JP2007012057A - Image forming device, and communication method between processes - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming device and a communication method between processes capable of achieving variable architecture and various functions, and improving software development efficiency. <P>SOLUTION: The image forming device having a hardware resource and a program, is provided with an agent processing means for receiving an agent including one or a plurality of service requests, selecting one or a plurality of control services for every service request of the agent, and performing a service request to the selected control service. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image forming apparatus and an interprocess communication method, and more particularly to an image forming apparatus and an interprocess communication method in which a plurality of processes perform interprocess communication as a server process or a client process.

  2. Description of the Related Art In recent years, an image forming apparatus (hereinafter, referred to as “multifunction machine”) in which functions of apparatuses such as a printer, a copy machine, a facsimile machine, and a scanner are housed in a single housing is generally known.

  This multifunction device is provided with a display unit, a printing unit, an imaging unit, and the like in one casing, and is provided with three types of software respectively corresponding to a printer, a copying machine, and a facsimile machine. It operates as a copy, scanner or facsimile machine.

  A conventional multi-function machine has a configuration in which software (including a general-purpose OS) corresponding to a printer, a copy, a scanner, and a facsimile machine is provided separately, and development of each software requires a lot of time.

  For this reason, the applicant can use the software group called the driver that drives the hardware interface, the manager software group for efficiently using the common hardware assets such as the memory / timer, and each application. A multi-function machine comprising a system utility software group and an actual application such as a printer / scanner / fax transmission / fax reception using these driver software group, manager software group, utility software group -51398 and JP-A-9-91102).

  However, the multifunction peripherals described in JP-A-9-51398 and JP-A-9-91102 have a driver software group, a manager software group, and a utility software group configured by a library. It could not be a subject that controls the execution of resources.

  Accordingly, the applicant has a plurality of applications that have hardware resources used in image forming processing such as a display unit, a printing unit, and an imaging unit, and perform processing unique to each user service such as a printer, copy, or facsimile. When installing and providing user services by interposing between these applications and hardware resources, management, execution control and image formation processing of hardware resources that are shared by at least two of the applications are performed. A multi-function machine (see Japanese Patent Application Laid-Open No. 2002-82806) equipped with a platform comprising various control services to be invented.

  The user service is a service related to image formation provided to the user. The control service refers to a service that provides hardware resources related to image formation to an application.

According to this multi-function peripheral, it is possible to improve the efficiency of software development by providing a platform for performing management, execution control, and image formation processing of hardware resources commonly required by at least two applications. As a result, the productivity of the entire apparatus can be improved.
JP-A-9-51398 JP-A-9-91102 JP 2002-82806 A

  Such a multi-function peripheral has a control service that provides services that are commonly required by at least two of the applications. Therefore, it is possible to change functions, add functions, or add or change hardware resources in the future. It is desirable to be able to easily add or change for each application or control service in order to respond flexibly to the above. Further, when providing a user service, it is necessary to smoothly exchange services and data between each application and each control service or between each control service.

  In other words, a multifunction device has a variety of functions such as printers, copiers, facsimiles, scanners, etc., but if some of the functions fail or specification changes occur, all applications or all control services If you have to modify these modules, the work effort will be excessive.

  Also, even if new functions are added to the MFP in the future, if it is necessary to change all control services and all application modules to add some functions, the program development effort will be excessive. End up. For this reason, it is necessary for each application and each control service module operating on the multifunction peripheral to maintain the independence between the modules while realizing the transmission and reception of services and data with each other.

  In other words, if there is no independence for each application and each control service, it will be difficult to provide only the necessary applications and necessary control services, and a multifunction device that can flexibly respond to function changes and additions. There is a problem that the configuration cannot have variability.

  Also, if there is no independence for each application or each control service, it will be difficult to develop a method for realizing data transmission / reception between modules. Furthermore, it becomes difficult to design and construct each application and control service, and as a result, there is a problem that a wide variety of functions cannot be provided.

  In particular, since a multifunction peripheral is equipped with a multi-function such as a printer, a copy, a scanner, and a fax machine, there are cases where it is desired to use a plurality of functions continuously from a PC (Personal Computer) connected to a network. However, it is necessary for a conventional multifunction device to make a separate request with a command for each function.

  In addition, all the services that can be provided for a multifunction device are not unified. For example, there are multifunction devices that can provide only a printer function and a copy function, and multifunction devices that can provide a fax transmission function. When multiple MFPs with different provision functions are connected to the network, for example, when a fax transmission request is made to a certain MFP and the MFP does not have a fax transmission function, the user Needs to send a fax transmission request to another multifunction device.

  As described above, when a conventional multi-function peripheral is connected to a network and used, there is a problem that various functions cannot be efficiently provided.

  The present invention has been made in view of the above, and provides an image forming apparatus and an interprocess communication method capable of realizing a variable architecture and various functions and improving software development efficiency. The main purpose.

  Another object of the present invention is to provide an image forming apparatus and an interprocess communication method capable of efficiently providing a wide variety of functions when the image forming apparatus is connected to a network.

  In order to solve the above-mentioned problem, an invention according to claim 1 is an image forming system including hardware resources used in image forming processing and one or a plurality of programs for processing user services and control services related to image forming. A device that receives an agent including one or more service requests, selects one or more control services for each service request of the agent, and makes a service request to the selected control services Agent processing means is provided.

  According to the first aspect of the present invention, if a service receiving side makes a plurality of service requests at a time, a necessary control service is autonomously determined, so that continuous service provision is efficiently performed. be able to.

  Further, since a continuous service can be provided once a plurality of service requests are made, it is not necessary to occupy the network for each service request, and the load on the network can be reduced.

  In the first aspect of the invention, the configuration of the image forming apparatus on which the control service is operating is not limited as long as the user service and the control service can be installed.

  That is, the image forming apparatus only needs to have at least one control service for providing a service, and an image forming apparatus with no user service installed or an image forming apparatus with only one control service installed is also available. included.

  In the invention according to claim 2, the agent processing means determines whether or not the control service required for the service request is operating normally, and is connected via a network when the service is not operating normally. The agent is transmitted to another image forming apparatus.

  According to the second aspect of the present invention, the control service necessary for the service request is autonomously determined not only from the own image forming apparatus but also from the image forming apparatus on the network. If a service request is made to one image forming apparatus, it is not necessary to access a plurality of image forming apparatuses on the network, and an efficient service can be provided.

  In addition, the side receiving the service provision does not need to repeatedly send and receive messages to and from the image forming apparatus via the network, so the load on the network can be reduced.

  According to a third aspect of the present invention, the agent processing means further selects one or a plurality of the user services for each service request and makes a service request for the selected user services. Features.

  According to the third aspect of the present invention, if a service receiving side makes a plurality of service requests at a time, a necessary user service is autonomously determined, so that continuous service provision is efficiently performed. be able to.

  Further, since continuous service can be provided, it is not necessary to occupy the network for each service request, and the load on the network can be reduced.

  According to a fourth aspect of the present invention, the agent processing means determines whether or not the user service required for the service request is operating normally. If the user service is not operating normally, the agent processing means connects via the network. The agent is transmitted to the other image forming apparatus.

  According to the fourth aspect of the present invention, the user service required for the service request is autonomously determined not only from the own image forming apparatus but also from the image forming apparatus on the network. If a service request is made to one image forming apparatus, it is not necessary to access a plurality of image forming apparatuses on the network, and an efficient service can be provided.

  In addition, the side receiving the service provision does not need to repeatedly send and receive messages to and from the image forming apparatus via the network, so the load on the network can be reduced.

  The invention according to claim 5 further includes an agent application included in the user service and operating as the agent processing means.

  According to the fifth aspect of the present invention, inter-process communication between the control service and the agent application can be performed using the application interface, and the software development effort of the agent application can be reduced.

  According to a sixth aspect of the present invention, the control service operates as a server process for a client process operating on another image forming apparatus connected via a network, and is provided to the client process of the other image forming apparatus. It is an object having a method that defines one or a plurality of services.

  According to the invention of claim 6, the control service can realize inter-process communication by providing a service by executing a method as a server process using a process operating on another image forming apparatus on the network as a client. Service can be provided not only to the processes in the image forming apparatus but also to the image forming apparatuses on the network, and various functions can be realized.

  In the invention according to claim 7, each process of the control service generates one or a plurality of threads for executing a method defining a service provided to a client process of the other image forming apparatus. It is characterized by.

  According to the seventh aspect of the present invention, services provided to a user service process such as an application running on another image forming apparatus on the network can be executed in parallel.

  For this reason, for example, even when there is a service request simultaneously from client processes of a plurality of different image forming apparatuses on the network, the service is executed in parallel with a thread with fast switching of execution control. It is possible to provide services to

  The invention according to claim 8 is characterized in that the control service operates as a server process using a user service operating on the other image forming apparatus as a client process.

  According to the eighth aspect of the present invention, it is possible to provide a control service function to a user service process operating on another image forming apparatus on the network.

  Even when the control service does not exist in the image forming apparatus on the network or cannot be used, the function of the control service can be provided to the image forming apparatus on the network by executing the method. It becomes possible to share control service functions between devices.

  The invention according to claim 9 is characterized in that the control service operates as a server process using a control service operating on the other image forming apparatus as a client process.

  According to the ninth aspect of the present invention, the function of the control service can be provided to the control service that operates on another image forming apparatus on the network.

  Even when a certain control service does not exist in the image forming apparatus on the network or cannot be used, the function of the control service can be provided to the image forming apparatus on the network by executing the method. It becomes possible to share the function of the control service between the forming apparatuses.

  The invention according to claim 10 is characterized in that the control service operates as a client process in which the control service operating in the other image forming apparatus is a server process.

  According to the invention of claim 10, the control service can receive the service from the control service on the network. Further, even when the control service cannot be used in the image forming apparatus on the network, the service can be provided from the control service of the image forming apparatus on the network by interprocess communication called message transmission by method execution. It becomes possible to share the function of the control service among a plurality of image forming apparatuses using the.

  According to an eleventh aspect of the present invention, process communication is performed by an image forming apparatus having hardware resources used in image forming processing and one or a plurality of programs for processing user services and control services related to image forming. An inter-process communication method for performing an agent reception step of receiving an agent including one or more service requests, selecting one or more processes of the control service for each service request of the agent, and selecting the selected And an agent processing step for making a service request to the control service process.

  According to the eleventh aspect of the present invention, if a service receiving side makes a plurality of service requests at a time, a necessary control service process is autonomously determined. Can be done well.

  Further, since a continuous service can be provided once a plurality of service requests are made, it is not necessary to occupy the network for each service request, and the load on the network can be reduced.

  According to the present invention, it is possible to realize a variable architecture and various functions, and to improve software development efficiency. In addition, according to the present invention, when an image forming apparatus is connected to a network and used, various functions can be efficiently provided.

Exemplary embodiments of an image forming apparatus and an interprocess communication method according to the present invention will be explained below in detail with reference to the accompanying drawings.
(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of an image forming apparatus (hereinafter referred to as “multifunction machine”) according to Embodiment 1 of the present invention. As shown in FIG. 1, a multi-function device 100 includes a monochrome line printer (B & W LP) 101, a color line printer (Color LP) 102, a scanner 103, a facsimile 104, a hard disk device (HDD) 105, and a network interface. The software group 110 includes hardware resources such as 106, and includes a platform 120 and an application 130.

  The platform 120 interprets a processing request from the application 130 and generates a hardware resource acquisition request, and a system resource that manages one or a plurality of hardware resources and arbitrates the acquisition request from the control service. A manager (SRM) 123 and a general-purpose OS 121 are included.

  The control service is formed of a plurality of service modules, and includes an SCS (system control service) 122, an ECS (engine control service) 124, an MCS (memory control service) 125, an OCS (operation panel control service) 126, and an FCS. (Fax Control Service) 127 and NCS (Network Control Service) 128.

  The platform 120 has an application program interface (API) that can receive a processing request from the application 130 by a predefined method.

  The general-purpose OS 121 is a general-purpose operating system such as UNIX (registered trademark), and executes the software of the platform 120 and the application 130 in parallel as processes.

  The SRM 123, together with the SCS 122, controls the system and manages resources, and includes engines such as a scanner unit and a printer unit, memory, HDD files, host I / O (Centro I / F, network I / F, IEEE 1394 I / O). (F, RS232C I / F, etc.) arbitration is performed according to a request from a higher layer using hardware resources, and execution control is performed.

  Specifically, the SRM 123 determines whether the requested hardware resource is available (whether it is not used by another request), and if it is available, the requested hardware resource is used. Tell the upper layer that it is possible. The SRM 123 also schedules the use of hardware resources in response to requests from higher layers, and directly implements the request contents (for example, paper conveyance and image forming operation, memory allocation, file generation, etc. by the printer engine). .

  The SCS 122 performs application management, operation unit control, system screen display, LED display, resource management, and interrupt application control. The ECS 124 controls a hardware resource engine including a monochrome line printer (B & W LP) 101, a color line printer (Color LP) 102, a scanner 103, and a facsimile 104.

  The MCS 125 acquires and releases an image memory, uses an HDD, compresses and decompresses image data, and the like. The OCS 126 is a module that controls an operation panel serving as information transmission means between the operator and the main body control.

  FCS 127 performs facsimile transmission / reception using the PSTN / ISDN network from each application layer of the system controller, registration / quotation of various facsimile data managed by BKM (backup SRAM), facsimile reading, facsimile reception printing, and fusion transmission / reception. API is provided. In the FCS 127, an FCU handler (FCUH) 129, which is a subprocess thereof, is activated. The FCUH 129 controls a device driver of the facsimile engine when a facsimile is transmitted / received by a command from the FCS 127.

  The NCS 128 is a module group for providing a service that can be commonly used for the applications 130 that require network I / O. The NCS 128 distributes data received from the network side according to each protocol to the applications 130, Mediates when sending data to the network side.

  The application 130 includes a printer application 111 that is a printer application having a page description language (PDL), PCL, and postscript (PS), a copy application 112 that is a copy application, and a fax application 113 that is a facsimile application. A scanner application 114 as a scanner application, a network file application 115 as a network file application, and a process inspection application 116 as a process inspection application.

  Each of these control services, the SRM 123, and each application 130 is an object having one or a plurality of methods, and is generated and executed as a process on the general-purpose OS 121 by activating this object. A plurality of threads are activated in each process, and parallel execution is realized by switching the CPU occupation time of these threads under the management of the general-purpose OS 121. For this reason, compared with parallel execution by process switching, the processing speed at the time of parallel execution is improved.

  Messages are transmitted and received between each application process and each control service process by inter-process communication by executing a method. FIG. 2 is a block diagram illustrating a relationship between a server process and a client process that operate on the multifunction peripheral according to the first embodiment. Here, the server process 202 refers to a process that provides a service to the client process 201 in response to a request from the client process 201. The client process 201 is a process that receives a service from the server process 202 by making a request to the server process 202.

  In the MFP 100 according to the first embodiment, the processes of the application 130 such as the copy application 112, the printer application 111, the scanner application 114, and the fax application 113 and the process of the control service such as the ECS 124, the MCS 125, the FCS 127, and the NCS 128 are mainly used. The client process 201 and the process of the control service and SRM 123 are mainly the server process 202.

  That is, when each application 130 is provided with a service from the control service, the process of each application 130 operates as the client process 201 and the control service operates as the server process 202. Further, when requesting and providing a service between control services, the control service that performs the service request operates as the client process 201, and the control service that provides the service operates as the server process 202.

  Not limited to these examples, the process of each application 130, the process of the control service, and the SRM process 123 can all be the server process 202 and the client process 201.

  That is, these processes operate as the client process 201 when a service is requested from any other process, and operate as the server process 202 when a service is provided by a request from another process. Become.

  A plurality of threads are activated in all the processes of the application 130, the control service, and the SRM 123. For this reason, when a request is received from another process, it operates as a server process 202 with the other process as a client process 201. At the same time, when a service is requested from another process. It operates as a client process 201 with the other process as the server process 202.

  Each process can also be a server process 202 having a plurality of processes as client processes 201 at the same time. Further, each process can be a client process 201 that receives services from a plurality of server processes 202 at the same time.

  As shown in FIG. 2, the client process 201 executes a service request method for transmitting a service request message from a thread in the client process 201 to the server process 202 in order to request the service of the server process 202.

  The server process 202 that has received this service request message executes the service execution method. This service execution method is a method for executing a service requested by the client process 201 and transmitting the execution result to the requesting client process 201 as an execution result message.

  In the example of FIG. 2, the client process 201 executes a service A request method and transmits a service A request message to the server process 202 in order to receive provision of the service A. When the server process 202 receives this service A request message, the service A execution method is executed. The server process 202 executes (1) the process of service A by executing the service A execution method, and then (2) transmits the execution result of service A to the client process 201 as a service A execution result message.

  As described above, the inter-process communication between the server process 202 and the client process 201 is realized by a series of processes of transmitting a service request message by executing a method, providing a service by executing a method, and transmitting a service execution result message.

  FIG. 3 is an explanatory diagram showing methods defined in advance for each application and each control service object. As shown in FIG. 3, each object mainly includes a service request method for sending a service request message to the server process 202 when the client process 201 becomes a service process, and a request from the client process 201. A service execution method is defined which executes a service providing process when receiving a service request message and operates as the server process 202 and transmits the execution result message to the requesting client process 201.

  For example, in the ECS 124 object, a memory image information acquisition request method, a memory allocation request method, a resource acquisition request method, and the like are registered as service request methods, while a job operation mode setting method and a job start method are registered as service execution methods. Job open method and job close method are registered.

  The job operation mode setting method, job start method, job open method, and job close method received the job operation mode setting request message, job start request message, job open request message, and job close request message from the client process 201, respectively. When executed.

  In the object of the printer application 111, a job operation setting request method, a job start request method, and the like are registered as service request methods. The service request method and the service execution method are registered in the same manner for each of the other control services, SRM 123, and other applications 130 shown in FIG.

  Next, an example of a printer operation that is actually performed in the multifunction peripheral 100 according to the first embodiment will be described. FIG. 4 is an explanatory diagram illustrating a data sequence between processes of the printer application, ECS, MCS, and SRM when the printer operation is performed by the multifunction peripheral according to the first embodiment.

  In the multifunction device 100, the printer application process 111, the ECS process 124, the MCS process 125, and the SRM process 123 are operating. These processes are generated when the multifunction peripheral 100 is activated.

  In the printer application process 111, a plurality of threads are activated in the process. The printer application process 111 is a client process 201 that uses the ECS process 124 as the server process 202. The ECS process 124 becomes a server process 202 having the printer application process 111 as the client process 201 during the printer operation, and also becomes a client process 201 having the MCS process 125 and the SRM process 123 as the server process 202, respectively.

  The MCS process 125 becomes a server process 202 using the ECS process 124 as the client process 201 during the printer operation, and also becomes a client process 201 using the SRM process 123 as the server process 202. The SRM process 123 is a server process 202 that uses the ECS process 124 or the MCS process 125 as a client process 201 during printer operation.

  When there is a print request from a host such as a PC via a Centro I / F, USB I / F, network I / F, etc., the NCS process 128 receives the print request and transfers it to the printer application process 111 (step S401). ).

  Upon receiving a print request from the NCS process 128, the printer application process 111 generates a new printer job, executes a job operation mode setting request method, and transmits a job operation mode setting request message to the ECS process 124 ( Step S402). Here, the job operation mode is a group of parameters necessary for operating the scanner, plotter, finisher, and the like. The operation conditions of the job generated from the printer conditions such as the print paper size, the number of copies, and the paper feed tray are set. It is determined.

  When receiving the job operation mode setting request message from the printer application process 111, the ECS process 124 executes the job operation mode setting execution method, sets the above-described job operation mode for the newly generated printer job, and The execution result message is transmitted to the printer application process 111.

  Upon receiving the job operation mode setting execution result message from the ECS process 124, the printer application process 111 executes a job start request method and sends a job start request message to the ECS process 124 in order to make a job start request. (Step S403).

  When the ECS process 124 receives a job start request message from the printer application process 111, the ECS process 124 activates a job start execution method, performs job start processing, and transmits the execution result message to the printer application process 111. The printer application process 111 receives a job start execution result message from the ECS process 124.

  Next, the ECS process 124 executes a memory image information request method to acquire print data stored in the memory, and transmits a memory image information request message to the MCS process 125 (step S404).

  Upon receiving the memory image information request message from the ECS process 124, the MCS process 125 activates the memory image information execution method. Then, the MCS process 125 acquires the image data stored in the memory, and transmits the image data together with the execution result message to the ECS process 124 (step S405). The ECS process 124 repeatedly transmits the memory image information request message and receives the image data until the print page is completed (steps S408 and S409).

  After transmitting the image data to the ECS process 124, the MCS process 125 executes a memory acquisition request method in order to secure an image memory, and transmits a memory acquisition request message to the SRM process 123 (step S406). When the SRM process 123 receives a memory acquisition request message from the MCS process 125, it executes a memory acquisition execution method, reserves an image memory for printing, and transmits the execution result message to the MCS process 125.

  After receiving the print data of the first page from the MCS process 125, the ECS process 124 executes a resource acquisition request method and acquires a resource acquisition request message to the SRM process 123 in order to acquire a printer engine resource. (Step S407). When the SRM process 123 receives the resource acquisition request message from the ECS process 124, the SRM process 123 executes the resource acquisition execution method, occupies the printer engine, and transmits the execution result message to the ECS process 124.

  When the ECS process 124 receives a “no image” response as an execution result message in response to the memory image information request (step S411) (step S412), the ECS process 124 determines that printing of all the printed pages has been completed. The notification method is executed, and a job end notification message is transmitted to the printer application process 111 (step S413). The printer application process 111 detects the end of printing by receiving this job end notification message.

  Next, an example of a scanner operation that is actually performed in the multifunction peripheral 100 according to the first embodiment will be described. FIG. 5 is an explanatory diagram showing a data sequence between each process of the scanner application, ECS, MCS, and SRM when the scanner operation is performed in the multifunction machine of the first embodiment.

  In the multifunction device 100, a scanner application process 114, an ECS process 124, an MCS process 125, and an SRM process 123 are operating. These processes are generated when the MFP is started.

  In the scanner application process 114, a plurality of threads are activated in the process. The scanner application process 114 is a client process 201 that uses the ECS process 124 as a server process 202. The ECS process 124 becomes a server process 202 using the scanner application process 114 as the client process 201 during the scanner operation, and also becomes a client process 201 using the MCS process 125 and the SRM process 124 as the server process 202, respectively. The MCS process 125 becomes a server process 202 using the scanner application process 114 and the ECS process 124 as the client process 201 during the scanner operation. The SRM process 123 becomes a server process 202 with the ECS process 124 as a client process 201.

  When there is a scan request to the scanner application process 114, the scanner application process 114 generates a new scanner job, executes a job open request method, and transmits a job open request message to the ECS process 124 (step S1). S501).

  When the ECS process 124 receives a job open request message from the scanner application process 114, it executes a job open execution method, performs job open processing, and transmits the execution result message to the scanner application process 114.

  Upon receiving the job open execution result message from the ECS process 124, the scanner application process 114 executes the file generation request method and transmits a file generation request message to the MCS process 125 (step S502). Upon receiving the file generation request message from the scanner application process 114, the MCS process 125 executes a file generation execution method, generates a file for temporarily storing the scanned image on the HDD, and outputs the execution result message to the scanner. Send to application process 114.

  Upon receiving the file generation execution result message, the scanner application process 114 executes a job operation mode setting request method to set a job operation mode, and transmits a job operation mode setting request message to the ECS process 124 ( Step S503).

  Upon receiving the job operation mode setting request message from the scanner application process 114, the ECS process 124 executes the job operation mode setting execution method, sets the above-described job operation mode in the scanner job, and sends the execution result message to the scanner application. Send to process 114.

  Next, the scanner application process 114 executes a job start request method and transmits a job start request message to the ECS process 124 (step S504). When the ECS process 124 receives the job start request message, the ECS process 124 executes the job start request execution method, performs job start processing, and transmits the execution result message to the scanner application process 114.

  On the other hand, the ECS process 124 executes a resource acquisition request method for acquiring resources of the scanner engine, and transmits a resource acquisition request message to the SRM process 123 (step S505). Upon receiving the resource acquisition request message, the SRM process 123 executes the resource acquisition execution method, occupies the scanner engine, and transmits the execution result message to the ECS process 124.

  Next, the ECS process 124 executes a page generation request method to secure a memory for storing the scanned image in units of pages, and transmits a page generation request message to the MCS process 125 (step S506). When receiving the page generation request message, the MCS process 125 executes the page generation execution method to secure one page of memory, opens the reserved page, and transmits the execution result message to the ECS process 124.

  Upon receiving the page generation execution result message, the ECS process 124 executes a document feed-in request method, transmits a document feed-in instruction message to the scanner engine (step S507), and reads the document by the scanner. To start.

  When the document reading operation for one page is completed, a scan end notification message is transmitted from the scanner engine to the ECS process 124 (step S508), and the ECS process 124 receives this scan end notification message. When receiving the scan end notification message, the ECS process 124 executes a page close request method and transmits a page close request message to the MCS process 124 (step S509).

  Upon receiving the page close request message, the MCS process 125 executes the page close execution method, closes the image memory for one page opened on the memory, and transmits the execution result message to the ECS process 124. .

  The ECS process 124 repeats the above-described processing from the transmission of the page generation request message to the transmission of the page close request message (steps S506 to S509) for the number of documents. When scanning of the last page of the document is completed, a scan processing completion notification message is transmitted from the scanner engine to the ECS process 124 (step S510).

  When receiving the scan processing completion notification message, the ECS process 124 transmits a scan completion notification message to the scanner application process 114 (step S511), and further executes a job end notification method to transmit a job end notification message (step S511). Step S512).

  The scanner application process 114 sequentially receives a scan processing completion notification message and a job end notification message from the ECS process 124. On the other hand, the scanner application process 114 executes a file information registration request method and transmits a file information registration request message to the MCS process 125 (step S513).

  When the MCS process 125 receives the file information registration request message, the MCS process 125 executes the file information registration execution method to store the file name and storage destination for all temporarily generated scanned images of the originals. Etc., and the execution result message is transmitted to the scanner application process 114.

  Upon receiving the file information registration execution result message, the scanner application process 114 executes a file close request method and transmits a file close request message to the MCS process 125 (step S514). Upon receiving the file close request message, the MCS process 125 executes a file close execution method, closes the scanned image file, and transmits the execution result message to the scanner application process 114. The scanner application process 114 ends the scanning process by receiving the file close execution result message.

  Next, the scanner application process 114 performs the following processing to read out the stored scan image. First, the scanner application process 114 executes a file open request method, and transmits a file open request message for opening a scan image file to the MCS process 125. In addition, the scanner application process 114 sequentially transmits a work area securing request message for securing work memory by executing the work area securing request method, and a page open request message by executing the page open request method (step S515). S517).

  The MCS process 125 sequentially receives a file open request message, a work area securing request message, and a page open request message from the scanner application process 114, and executes a scan image file open process and a work area securing execution method by executing the file open execution method. The process of securing the working memory by executing the page and the page opening process by executing the page open execution method are performed, and an execution result message of each process is transmitted to the scanner application process 114.

  The scanner application process 114 executes a read request method for reading image data from the scanned image file, and transmits a read request message to the MCS process 125 (step S518).

  Further, the scanner application process 114 executes a page close request method and transmits a page close request message to the MCS process 125 (step S519).

  After the page opening process is completed, the MCS process 125 receives a read request message from the scanner application process 114, executes a read execution method to read image data from the scanner image file, and sends the execution result message together with the image data to the scanner application. Send to process 114. When the scanner application process 114 receives an execution result message related to reading of image data, the scanner application process 114 transmits a next read request message to the MCS 125 and receives the execution result message.

  When the MCS process 125 receives the page close request message from the scanner application process 114 after the end of the last reading process, the MCS process 125 executes the page close execution method, performs the close process of the open page data, and executes the execution result message. Is transmitted to the scanner application process 114.

  Upon receiving the page close execution result message, the scanner application process 114 sequentially transmits a page delete request message, a work area delete request message, a file close request message, and a file delete request message to the MCS 125 (steps S520 to S523). .

  The MCS process 125 receives a page deletion request message, a work area deletion request message, a file close request message, and a file deletion request message in order, and deletes page data, deletes working memory, Each process of closing the scan image file and deleting the scan image file is performed, and an execution result message of each process is transmitted to the scanner application process 114. When the scanner application process 114 receives the execution result message of each process from the MCS process 125, the scan image reading process is completed.

  Next, an example of a copy operation that is actually performed in the multifunction peripheral 100 according to the first embodiment will be described. FIG. 6 is an explanatory diagram showing a data sequence between processes of the copy application, ECS, MCS, and SRM when a copy operation is performed in the multifunction machine of the first embodiment.

  In the MFP 100, a copy application process 112, an ECS process 124, an MCS process 125, and an SRM process 123 are operating. These processes are generated when the multifunction peripheral 100 is activated. These processes are in a state where a plurality of threads are activated in the process.

  The copy application process 112 is a client process 201 using the ECS process 124 as the server process 202. The ECS process 124 becomes a server process 202 using the copy application process 112 as the client process 201 during the copy operation, and becomes a client process 201 using the MCS process 125 and the SRM process 123 as the server process 202, respectively.

  The MCS process 125 becomes a server process 202 using the ECS process 124 as the client process 201 during the copy operation, and becomes a client process 201 using the SRM process 123 as the server process 202. The SRM process 123 becomes a server process 202 using the ECS process 124 and the MCS process 125 as the client process 201.

  When there is a copy request, the copy application process 112 generates a new copy job, and similarly to the scanner operation, the ECS process 124 receives a job open request message, a job operation mode setting request message, and a job start request message. Is transmitted (steps S601 to S603). The operation of the ECS process 124 that has received these request messages is the same as in the case of the scanner operation described above, and a description thereof will be omitted.

  In the ECS process 124, when a job start execution result message is transmitted to the copy application process 112, a memory allocation request method is then executed in order to allocate a memory for storing the scanned image, which is necessary for the MCS process 125. A memory allocation request message designating an appropriate size is transmitted (step S604).

  Upon receipt of the memory allocation request message, the MCS process 125 executes a memory allocation execution method, executes a memory acquisition request method for allocating an area on the memory of a specified size, and acquires memory from the SRM 123. A request message is transmitted (step S605). When the SRM 123 receives the memory acquisition request message, the SRM 123 executes a memory acquisition execution method, occupies an area of a specified size on the memory, and transmits the execution result message to the MCS process 125.

  The MCS process 125 that has received the execution result message for acquiring the memory transmits the received execution result message to the ECS process 124 as an execution result message for securing the memory. Next, the ECS process 124 that has received the memory allocation execution result message executes a resource acquisition request method to acquire the resources of the scanner engine and printer engine, and transmits a resource acquisition request message to the SRM process 123 ( Step S606).

  When the SRM process 123 receives the resource acquisition request message, the SRM process 123 executes the resource acquisition execution method to occupy the scanner engine and the printer engine, and transmits the execution result message to the ECS process 124.

  When the ECS process 124 receives the resource acquisition execution result message from the SRM process 123 and occupies the scanner engine and the printer engine in the copy job, the ECS process 124 executes the document feed-in request method and feeds the document to the scanner engine. Is sent (step S607), and the document scanning process is started.

  When the scan process of the document is completed, the scanner engine transmits a scan end notification message to the ECS process 124 (step S608), and causes the printer engine to start the scan image print process. When the print processing of the scanned image is completed, the printer engine transmits a print end notification message to the ECS process 124 (step S610).

  When receiving the scan end notification message from the scanner engine, the ECS process 124 executes a job end notification method and transmits a job end notification message to the copy application process 112 to the effect that the scan has ended (step S609). When the ECS process 124 receives the print end notification message from the printer engine, the ECS process 124 executes the job end notification method and transmits a job end notification message indicating the end of printing to the copy application process 112 (step S611). The copy application process 112 receives two job end notification messages, thereby completing the copy operation for one page of the document.

  When copying a plurality of documents, a job start request message is further transmitted to the ECS process 124 (step S612). As a result, operations similar to those described above are performed by the ECS process 124, the MCS process 125, the SRM process 123, the scanner engine, and the printer engine (steps S613 to S616). When copying of all the originals is completed and the copy application process 112 receives the final job end notification message (step S617), the copy application process 112 executes a job close request method and requests the ECS process 124 to close the job. A message is transmitted (step S618).

  When receiving the job close request message, the ECS process 124 executes the job close execution method, closes the copy job in the open state, and transmits the execution result message to the copy application process 112. When the copy application process 112 receives the job close execution result message from the ECS process 124, the copy operation is completed.

  Next, an example of a facsimile transmission operation that is actually performed in the MFP 100 according to the first embodiment will be described. FIG. 7 is an explanatory diagram showing a data sequence between processes of the fax application, FCS, ECS, MCS, and SRM when the facsimile transmission operation is performed in the multifunction machine of the first embodiment.

  In the multifunction machine 100, a fax application process 113, an FCS process 127, an FCUH process 129, an ECS process 124, an MCS process 125, and an SRM process 123 are operating. These processes are generated when the MFP 100 is activated. These processes are in a state where a plurality of threads are activated in the process.

  The fax application process 113 is a client process 201 in which the FCS process 127 is the server process 202. The FCS process 127 becomes a server process 202 using the fax application process 113 as the client process 201 during a facsimile transmission operation, and becomes a client process 201 using the ECS process 124 and the FCUH process 129 as the server process 202.

  The FCUH process 129 is a sub-process of the FCS process 127 and becomes a server process 202 using the SRM process 123 and the FCS 127 as the client process 201 during facsimile transmission operation. The ECS process 124 becomes a server process 202 having the FCS process 127 as the client process 201 during the facsimile transmission operation, and becomes a client process 201 having the MCS process 125 and the SRM process 123 as the server process 202, respectively.

  The MCS process 125 becomes a server process 202 having the ECS process 124 as the client process 201 and a client process 201 having the SRM process 123 as the server process 202 during the facsimile transmission operation. The SRM process 123 becomes a server process 202 using the ECS process 124 and the MCS process 125 as the client process 201, and becomes a client process 201 using the FCUH process 129 as the server process 202.

  When there is a facsimile transmission request, the fax application process 113 generates a new facsimile transmission job, executes a transmission start request method, and transmits a transmission start request message to the FCS process 127 (step S701).

  When the FCS process 127 receives a transmission start request message from the fax application process 113, the FCS process 127 executes a transmission start execution method. This transmission start execution method executes the job operation mode setting request method and transmits a job operation mode setting request message to the ECS process 124 (step S702). The transmission start execution method executes the job start request method and transmits a job start request message to the ECS process 124 (step S703).

  Note that the operation of the ECS process 124 that has received the job operation mode setting request message and the job start request message is the same as that of the scanner operation described above, and a description thereof will be omitted.

  The ECS process 124 that has received the job start request message and performed the job start processing then executes the memory reservation request method and transmits the memory reservation request message to the MCS 125 (step S704). The MCS process 125 that has received this memory allocation request message executes the memory acquisition request method and transmits the memory acquisition request message to the SRM process 123 (step S705).

  Further, the ECS process 124 executes a resource acquisition request method to acquire a scanner engine and a facsimile engine, and transmits a resource acquisition request message to the SRM process 123 (step S706).

  The processing of the MCS process 125 and SRM process 123 that have received these messages and the processing of the ECS process 124 are the same as the processing during the copy operation, and thus description thereof is omitted.

  In the ECS process 124, when the execution result message of the scanner engine resource acquisition is received, the scan parameter confirmation request method is executed, and the scan parameter confirmation request message is transmitted to the FCS process 127 (step S707).

  Here, the scan parameters are, for example, fine and normal scan densities, document sizes, and the like. When the FCS process 127 receives this scan parameter confirmation request message, the FCS process 127 executes a scan parameter confirmation execution method, and transmits the scan parameter as a message to the ECS process 124 (step S708).

  Upon receiving the scan parameter message, the ECS process 124 executes the scan / feed-in process instruction method and transmits the scan / feed-in process instruction message to instruct the SRM process 123 to generate the scan / feed-in process. (Step S709).

  Upon receiving the scan / feed-in process instruction message, the SRM process 123 executes the scan / feed-in process execution method to generate a scan / feed-in process (step S710). Next, a feed-in start request method is executed to send a document feed-in start request message to the FCUH process 129 (step S711). When the FCUH process 129 receives a feed-in start request message, document feed-in is started, and scanning of a document and transmission to a specified destination are started.

  When scanning of a document is started, a next page document presence / absence notification message indicating whether or not there is a document of the next page is transmitted from the scanner engine to the ECS process 124. In FIG. 7, a next page document presence notification message is notified (step S712). When scanning of the document is completed, a scan end message is transmitted from the scanner engine to the ECS process 124 (step S713).

  The ECS process 124 transmits the received scan end message to the FCS process 127 together with the presence of the next page document (step S714). On the other hand, when the document scan ends, the SRM process 123 executes a feed-in end request method, instructs the FCUH process 129 to end the feed-in (step S715), and ends the document feed-in.

  When the fax application process 113 executes a transmission mode change request method and transmits a transmission mode change request message to the FCS process 127 according to a user instruction or the like (step S716), the ECS process 124 determines the scan parameters. The request method is executed to send a scan parameter confirmation request message to the FCS process 127. On the other hand, as described above, the FCS process 127 transmits a scan parameter message to the ECS process 124 (step S718).

  Upon receiving the scan parameter message, the ECS process 124 executes the scan / feed-in process instruction method, instructs the SRM process 123 to execute the scan / feed-in process for the next page, and starts the scan / feed-in process. (Steps S719 and S720).

  On the other hand, when the facsimile transmission to the designated destination of one page is completed, the FCS process 127 transmits an EOM message (there is a next page in a different transmission mode) to the FCUH process 129 (step S721), and the FCUH process 129 that has received this message. Transmits EOM to the designated destination (step S722).

When the FCUH process 129 receives a notification of normal reception from the designated destination (step S723), it transmits a transmission success message to the SRM process 123 (step S724). A process normal end message is transmitted to (step S725).
Further, the ECS process 124 that has received the process normal end message executes the scan process completion notification method and transmits a scan process completion notification message for the first page to the FCS process 127 (step S726).

  Then, the SRM process 123 that has received the successful transmission message executes the stamp execution request method, and instructs the scanner engine to transmit the stamp such as the transmission date and time and the transmission source to the designated destination (step S727).

  The SRM process 123 executes a feed-in start request method in order to start feed-in of the second page document, and transmits a document feed-in start request message to the FCUH process 129 (step S728). The FCUH process 129 receives the feed-in start request message and starts document feed-in, whereby the document on the second page is scanned and transmitted to the designated destination.

  When scanning of a document is started, a next page document presence / absence notification message is transmitted from the scanner engine to the ECS process 124. In FIG. 7, the next page document non-notification message is notified and notified to the ECS process 124 (step S729). When scanning of the document is completed, a scan end message is transmitted from the scanner engine to the ECS process 124 (step S730).

  The ECS process 124 transmits the received scan end message to the FCS process 127 together with the fact that there is no next page document (step S731). On the other hand, when the scan is completed, the SRM process 123 executes a feed-in end request method and transmits a feed-in end message to the FCUH process 129 (step S732), thereby ending the document feed-in.

  When the facsimile transmission to the designated destination on page 2 is completed, the FCS process 127 sends an EOP message (no next page) to the FCUH process 129 (step S733), and the FCUH process 129 that has received this sends the EOP to the designated destination. (Step S734).

  When a normal reception notification is received from the designated destination (step S735), the FCUH process 129 transmits a transmission success message to the SRM process 123 (step S736), and the SRM process 123 that has received this message sends it to the ECS process 124. A process normal end message is transmitted to the server (step S737).

  Further, the ECS process 124 that has received the process normal end message transmits a scan processing completion notification message for the second page to the FCS process 127 (step S738). In addition, the SRM process 123 that has received the transmission success message executes the stamp execution request method, and issues a transmission instruction to the designated destination of the stamp such as the transmission date and time and the transmission source (step S739). Then, the ECS process 124 executes the job end notification method and transmits a job end notification message to the FCS process 127 (step S740). The FCS process 127 completes the facsimile transmission operation for all originals by receiving this job end notification message.

  As described above, in the MFP 100 according to the first embodiment, the process that becomes the client process 201 such as each application process is executed by the method execution with respect to the process that becomes the server process 202 such as the ECS process 124, the MCS process 125, and the SRM process 123. Since the server process 202 provides a service by sending a message and the server process 202 provides the service by executing the method and sends an execution result message to the client process 201, the inter-process communication is realized. In the MFP 100 having the special configuration, a variety of user service functions can be provided by a simple method.

  Each application 130, each control service, and each SRM 123 is an object having a method. Therefore, when there is a change in only some modules of the application 130 or the control service, or when a message is received on the module side serving as the server process 202 even if the control service and the application 130 are added as necessary. If the interface that implements the method for executing the service processing and the method for sending the service request message on the module side serving as the client process 201 is secured, the service and data can be exchanged. Software development efficiency such as addition or change of applications and control services can be improved, and the image forming apparatus can be configured to have variability.

Furthermore, since each control service is an object having a method, it is possible to conceal the data of each object. Even when the development of the application 130 is outsourced to a third vendor or the like, the contents of the control service It can be in a concealed state.
(Embodiment 2)
In the MFP 100 according to the first embodiment, the relationship between the server process and the client process has been conceptually described. Therefore, in the second embodiment, the server process and the client process will be described more specifically. Note that the configuration of the MFP 100 according to the second embodiment is the same as that in FIG.

  FIG. 8 is a block diagram illustrating in detail the relationship between a server process and a client process that operate on the multifunction peripheral 100 according to the second embodiment. Here, the client process 1600 refers to a process such as the SCS 122 that receives a service from the server processes 1610 and 1620 by making a request to the server processes 1610 and 1620.

  The server processes 1610 and 1620 are processes such as ECS 124 that provide services to the client process 1600 in response to a request from the client process 1600.

  As shown in FIG. 8, a plurality of threads 1601 are activated in the client process 1600. Since the client process 1600 has a plurality of threads 1601, a plurality of server processes 1610 and 1620 can request services simultaneously.

  Further, the client process 1600 performs a function call from the thread 1601 to the server processes 1610 and 1620 in order to request the services of the server processes 1610 and 1620, and performs inter-process communication by receiving the function return values. .

  The thread 1601 of the client process 1600 calls a function provided from the server processes 1610 and 1620 in advance. The function is defined in the client stub 1602. The client dispatcher 1603 is a thread that monitors reception of a function return value.

  The client process 1600 starts the client dispatcher 1603 for each of the server processes 1610 and 1620 and communicates with the server processes 1610 and 1620. Then, the server processes 1610 and 1620 that have received the function call execute processing corresponding to the requested function as follows.

  For example, the server dispatcher 1611 of the server process 1610 selects a thread 1613 corresponding to the requested function from a plurality of threads 1613 coded in the server skeleton 1612. The thread 1613 selected here corresponds to the function handler 403 described in the first embodiment. The thread 1613 of the server process 1610 executes the requested processing and transmits the execution result to the client process 1600 as a function return value.

  Next, a generation method for generating the client process 1600 and the server processes 1610 and 1620 according to the second embodiment will be described. FIG. 9 is a block diagram illustrating a functional configuration of a communication program generation device for an image forming apparatus (hereinafter referred to as “stub generator”) that generates a client process and a server process according to the second embodiment. The stub generator automatically generates a header, a client stub, and a server skeleton from a message file.

  As shown in FIG. 9, the stub generator generates an header from an input unit 1702 that inputs a message file 1701, a syntax analysis unit 1703 that checks the syntax of the content described in the message file 1701, and the description content of the message file 1701. 1706, a client stub 1707, and a code generator 1704 that generates a server skeleton 1705 and stores it in a storage medium such as a hard disk.

  First, the message file 1701 input to the stub generator, the header 1706 generated by the stub generator, the client stub 1707, and the server skeleton 1705 will be described.

  A message file 1701 is a source file in which communication contents of inter-process communication are described in a source code such as C language. FIG. 10 is an explanatory diagram of a description example of a message file. As shown in FIG. 10, the message file 1701 includes another message file, an include declaration that declares an include header of a C language description, a message description that describes a message that is transmitted and received between the server process and the client process, The declaration of the function issued from the client process to the server process is described.

A message is issued mainly when an event or notification is performed between a server process and a client process. As a message description of the message file 1701, a message name, a message ID, a message direction, and a message content are described. It is supposed to be.

  The message direction includes “IN”, “OUT”, and “SELF”. “IN” means a message transmitted from the client process to the server process. “OUT” means a message transmitted from the server process to the client process. “SELF” means a message to be transmitted to its own process.

The function is issued when a processing request or a setting request is issued from the client process to the server process. In the function declaration of the message file 1701, only the function name, function type, and argument are described, and the processing contents of the function are not described.

  The client stub 1707 is a source file describing the issuance of a function called from the client program to the server process. By compiling the client stub 1707 into a library and linking with the client program, a function call from the client program is issued to the server process via the client stub 1707.

  FIG. 11 is an explanatory diagram showing an example of a client stub 1707 generated by the stub generator. As shown in FIG. 11, a function call is performed on the client stub 1707 by calling a function handler registered in a server skeleton 1705 described later. The server skeleton 1705 is a source file in which a function handler called from the client stub 1707 and a message handler are registered.

  FIG. 12 is an explanatory diagram showing an example of the server skeleton 1705 generated by the stub generator. As shown in FIG. 12, a function handler corresponding to the function described in the client stub 1707 is registered in the server skeleton 1705.

  In the function handler, only the argument passing part is described, and the implementation description part describing the processing contents is generated in a blank state. In this implementation description section, the processing contents of the function issued from the client program via the client stub 1707 can be freely described by the developer of the server program. The header 1706 is a source file describing definitions and declarations common to the server skeleton 1705 and the client stub 1707.

  FIG. 13 is an explanatory diagram showing an example of the header 1706 generated by the stub generator. As shown in FIG. 13, the header 1706 is generated in a state where an include declaration described in the message file 1701, a message ID, a message declaration such as a message structure, a function declaration, a function handler declaration, and the like are described. It is like that.

  Next, generation processing of the server skeleton 1705, the client stub 1707, and the header 1706 by the stub generator will be described. FIG. 14 is a flowchart of a server skeleton, client stub, and header generation process.

  The syntax analysis unit 1703 of the stub generator performs a grammar check on the function declaration, message definition, include declaration, and C language description described in the message file 1701 (step S1801), and further, the function name and the function name defined in the message file 1701 The uniqueness of the message ID and message name in the message definition is determined (step S1802).

  If there is a syntax error in the description of the function declaration, message definition, or include declaration, or if any of the function name, message ID, or message name is duplicated, a message to the user that it is a syntax error And the process ends (steps S1803 and S1804).

  After the syntax analysis, the code generation unit 1704 generates a header 1706, a server skeleton 1705, and a client stub 1707 from the description content of the message file 1701. Specifically, the include declaration and C language description of the message file 1701 are transferred as they are to the header 1706, and the message structure described in the message definition of the message file 1701 is copied to the header 1706 (step S1805).

  In addition, the code generation unit 1704 automatically generates a function handler name from the function declaration of the message file 1701 (for example, in the case of the function name abc, the function handler name is generated as abc_handler), and the generated function handler name is the server skeleton. Register in 1705.

  In the function handler process, argument passing is described and issue of a return value area generation system call is described. The field of the implementation description part describing the actual processing contents of the function handler is left blank, and after the implementation description part, the issue of each system call for return value transmission and return value area release is described (step S1806).

  In addition, the code generation unit 1704 registers the function name and argument description in the client stub 1707 for each function declaration described in the message file 1701, and includes the function call message generation call and the function handler in the processing of the function. Each system call for calling and return value release is described (step S1807). A function return value waiting system call that waits for a return value of the issued function is internally issued for the function handler call.

  When the client stub 1707, the server skeleton 1705, and the header 1706 are generated by the stub generator in this manner, the server object and the client object are then completed.

  The developer of the server program describes the processing contents to be performed by the function handler in the function handler implementation description section (blank) of the server skeleton 1705 using an editor or the like, and compiles the server skeleton 1705 together with the header 1706 to Create a stub object. In addition, a function handler registered in the server skeleton 1705 is declared, a message handler that transmits / receives a message described in the message file 1701 to / from a client process, an error handler that performs error processing, server initialization, a server dispatcher Create and compile a server source file that describes the issuance of system calls such as startup, and link with the server stub object to complete the server program.

  On the other hand, the client stub 1707 is compiled with the header 1706 to generate a client stub object. A client stub object is generated for each server process, and the plurality of generated client stub objects are used as a library.

  Also, function issuance, function handler declaration, error handler declaration for error handling, message handler for sending and receiving messages described in the message file 1701 with the client process, and initialization of the client process and client dispatcher A client program describing the issuance of system calls such as activation is created and compiled, and the client program is completed by linking with a stub library.

  FIG. 15 is an explanatory diagram showing a call and response sequence with the server program when a function call is made from the client program. Note that the server program and the client program are actually executable object files, but in FIG. 15, both are displayed in source code for convenience of explanation.

  For example, when an Open function is called from the client program to the server program, Open defined in the client stub object is called (step S1901). Then, in the stub Open process, the Open function handler Open_handler is called to the server program (step S1902).

  The server program receives the issuance of the function handler Open_handler from the client stub object, executes the process described in the implementation description part of the Open_handler registered in the server stub object (step S1903), and outputs the execution result to the client stub. Is returned as a return value (step S1904). The client program receives this return value from the client stub (step S1905), and proceeds to the next processing.

  As described above, the stub generator of the second embodiment can easily generate the client stub 1707 and the server skeleton 1705 by describing the function declaration in the message file 1701. In addition, since the implementation description part of the generated server skeleton 1705 is blank, the program developer can easily change the processing contents of the function as necessary.

  For this reason, the multifunction device 100 can be provided with variability and various functions can be realized. In addition, even when a third-party vendor or other company develops a client program, inter-process communication is possible simply by describing the function call provided in the client program, so the internal communication protocol is concealed. Is possible.

In the stub generator of the second embodiment, since inter-process communication is realized by function calls, high-speed inter-process communication is possible even when parallel execution of jobs is realized by threads. Further, since the threads can be synchronized by the return value from the function, it is not necessary to separately create a processing program for synchronization, and the labor for program development can be reduced.
(Embodiment 3)
In the MFP 100 according to the first embodiment, the inter-process communication using the object method is performed. However, the MFP 100 according to the third embodiment further uses the function of the agent. .

  FIG. 16 is a block diagram of the configuration of the multifunction machine according to the third embodiment. As illustrated in FIG. 16, the MFP 100 according to the third embodiment is different from the MFP 100 according to the first embodiment in that an agent application 117 is provided in the application layer. For this reason, description is abbreviate | omitted about another structure. Note that the MFP 100 according to the third embodiment is connected to a network such as a LAN by the network interface 106.

  The agent application 117 is an application that interprets and executes the contents of the agent received via the network, and constitutes an agent processing means in the present invention. Here, the agent is a program that acts autonomously on behalf of the user and operates actively or moves through a network.

  By using an agent, it is not necessary to reduce the load on the network or always occupy the network. Moreover, continuous processing can be performed efficiently. Note that the operation and advantages of the agent will be described in detail in the following example. As the agent application 117, for example, a telescript engine that can interpret a telescript command can be used.

  Specifically, the agent application 117 receives an agent transmitted from another multifunction device or PC connected to the network via the NCS 128, and the content includes one or more service requests. The control service and application 130 necessary for each requested service are determined and selected from the contents, and a service request is made to the selected control service and application 130.

  Further, the agent application 117 determines whether or not the control service or application 130 necessary for the service request included in the received agent is operating normally in the MFP 100, and if the service is not operating normally ( In other cases, the MFP 100 autonomously searches for another MFP 100 on the network and transmits an agent to the other MFP 100.

  The other MFP 100 that has received the agent uses the agent application 117 to select a control service or application 130 required for each service and request a service, and to check the normal operation of the required control service or application 130. For this reason, unless the control service or application 130 necessary for the service is operating normally, the agent sequentially moves the multifunction peripherals in the network.

  Here, the modules necessary for the service request are, for example, the printer application 111, ECS 124, MCS 125, and SRM 123 for the print request, and the fax application 113, FCS 127, ECS 124, MCS 125, and SRM 123 for the facsimile transmission request.

  Next, inter-process communication using the agent function by the multifunction peripheral 100 according to the third embodiment will be described. In the MFP 100 according to the third embodiment, communication between processes operating in the MFP 100 is realized by message transmission by executing an object method, as in the MFP 100 according to the first embodiment. .

  FIG. 17 is a schematic diagram showing an example of interaction between the user's PC and the multifunction device when this agent function is applied to the multifunction device. FIG. 19 is an explanatory diagram showing the flow of inter-process communication in the multifunction peripheral 100a. Here, it is assumed that a PC 900 and a plurality of multifunction peripherals 100a, 100b, and 100c are connected to a network 901 such as a LAN. Each of the multifunction peripherals 100a, 100b, and 100c has the configuration shown in FIG.

  The PC 900 is equipped with an agent engine 902 that performs agent transmission. In the multifunction peripherals 100a, 100b, and 100c, the agent application 117 corresponds to the agent engine 902.

  As shown in FIG. 17, the agent is transmitted to the multifunction peripheral 100a by the agent engine 902 of the PC 900. A plurality of service requests can be described in this agent. In this way, an agent in which a plurality of service requests are described is sent to the multifunction device that receives the agent (or, if the agent has moved to another multifunction device on the network, the destination multifunction device) It is instructed to continuously execute a plurality of described service requests.

  In the example of FIG. 17, two service requests “file transfer X to PC” and “print X” are described in one agent in a program format. Here, “file transfer X to PC” indicates a file transfer request to the PC 900 for the file X stored in the HDD 105 of the multifunction peripheral 100a. “Print X” indicates a print request for the file X. Accordingly, the agent in the example shown in FIG. 17 instructs the multi-function peripheral that receives the agent to “transfer the file X to the PC 900 and then print the file X”.

  In the multifunction peripheral 100a, the agent from the PC 900 is received by the NCS 128 (step S1101) and transmitted to the agent application 117 (step S1102).

  The agent application 117 first selects the net file application 115 and MCS 125 necessary for file transfer from the contents of the service request described in the received agent. Further, the agent application 117 selects the printer application 111, ECS 124, MCS 125, and SRM 123 necessary for the print function from the contents of the received agent.

  Then, the agent application 117 makes a service request for transferring the file X stored in the HDD 105 to the PC 900 to the net file 115 for file transfer (step S1103).

  Upon receiving this service request, the net file application 115 accesses the HDD 105 from the MCS 125 (steps S1104 and S1105), reads the file X, and temporarily stores it in a memory or the like. The net file application 115 notifies the read execution result to the agent application 117 (step S1111).

  Also, the agent application 117 requests the printer application 111 to print the read file X by the color line printer 102 or the monochrome printer 101 (step S1106).

  Upon receiving this print request, the printer application 111 performs inter-process communication between the ECS 124, the MCS 125, and the SRM 123 (steps S1107, S1108, and S1109) according to the procedure described in the printing operation in the first embodiment. Printing is performed (step S1110). Then, the printer application 111 notifies the agent application 117 of the print execution result (step S1112).

  Next, the agent application 117 transmits the agent added with the two execution results and the file X temporarily stored in the memory to the PC 900 on the network by the NCS 128 (steps S1113 and S1114).

  Here, processing when the agent application 117 is not used will be described. FIG. 18 is a schematic diagram showing an example of the exchange between the user's PC and the multifunction machine when the agent function is not used.

  As shown in FIG. 18, when the agent application 117 is not provided, the user must separately send two requests “file X file transfer” and “file X print” from the PC 900 to the multi-function peripheral 100a. . A response to each request is also received separately. For this reason, not only can an efficient service be provided, but the number of accesses to the network increases to four times.

  On the other hand, when the agent is used as shown in FIG. 17, if the user of the PC 900 makes two requests “file transfer and print of file X” with one agent, the agent application 117 needs to do the necessary. The app and control service are autonomously determined, and the service for each request can be efficiently received. For this reason, the number of times of accessing the network is only two times when the first service request is transmitted and when the last execution result notification and file transfer are performed, so the load on the network is reduced.

  Next, a case where inter-process communication is performed between a plurality of multifunction peripherals connected to a network using an agent will be described. FIG. 20 is a schematic diagram illustrating an example of interaction between the user's PC and the multifunction device when the agent function is applied to a plurality of multifunction devices.

  As shown in FIG. 20, a PC 900 and a plurality of multifunction peripherals 100a, 100b, and 100c are connected to a network such as a LAN. Each of the multifunction peripherals 100a, 100b, and 100c has the configuration shown in FIG. 16, and therefore includes an agent application 117. Also, the PC 900 is equipped with an agent engine 902 that performs agent transmission.

  As shown in FIG. 20, a service request command is described in the agent. The agent in which the service request command is described in this manner checks whether or not the service request of the service request command described in the MFP that has received the agent is executable. In the case where execution is impossible, the agent is moved (transmitted) to another multi-function peripheral connected to the network, and it is checked whether or not a service request can be executed in the target multi-function peripheral.

  In the example of the agent in FIG. 20, since “facsimile transmission” is designated as the service request command, it is checked whether or not “facsimile transmission” can be executed by the MFP 100a that has received the agent. Makes a "facsimile transmission" service request, and if it cannot be executed, sends an agent to the other multifunction devices 100b, 100c connected to the network, and the destination multifunction device is the same as the multifunction device 100a. Is instructed to perform processing.

  In the example of the agent in FIG. 20, only one service request command is specified, but a plurality of service request commands may be specified. In this case, the same processing as described above is sequentially performed on a plurality of designated service request commands.

  In the example of the agent in FIG. 20, only the service request command is described. In this case, when it is determined that the service request cannot be executed, the agent autonomously moves to another multifunction device in the network. In the agent, below the line of the service request command, for example, “network address of multifunction device 100a → network address of multifunction device 100b → network address of multifunction device 100c” or the like is further described in the network. The order in which the multifunction peripherals and agents move with may be designated.

  In this case, when the service request cannot be executed by the multifunction device 100a, the agent autonomously moves to the multifunction device 100b and then to the multifunction device 100c.

  The agent is transmitted to the multi-function peripheral 100a by executing a telescript GO command by the agent engine 902 of the PC 900, for example.

  The multi-function device 100 a receives this agent by the NCS 128 and transmits it to the agent application 117. Upon receiving the agent, the agent application 117 interprets the contents of the agent, and first checks whether or not the processes of the fax application 113, FCS 127, ECS 124, MCS 125, and SRM 123 necessary for facsimile transmission are operating normally.

  Here, the normal operation investigation may be configured such that, for example, each process is accessed from the agent application 117 and it is determined that the normal operation is performed when there is a response to the access.

  If all of the fax application 113, FCS 127, ECS 124, MCS 125, and SRM 123 are operating normally, these processes are selected and a facsimile transmission request is transmitted to the fax application 113. In this case, processing similar to the procedure of the facsimile transmission operation described in the first embodiment is performed.

  However, if any of the fax application 113, FCS 127, ECS 124, MCS 125, and SRM 123 is determined to be abnormal, the following processing is performed. Here, a case where the ECS process 124 is abnormal is considered.

  At this time, the agent application 117 adds information such as the process name of the process whose operation is abnormal and its own network address to the agent. Then, the MFP 901 autonomously searches for the MFP in the network 901, and transmits the agent to the MFP first discovered (the MFP 100b in the example of FIG. 12).

  In the multifunction device 100b, the agent transmitted from the multifunction device 100a by the agent application 117 is received. Then, in the same manner as the agent application 117 of the multifunction peripheral 100a, the contents of the agent are interpreted, and a process that is necessary for facsimile transmission and that is described in the agent and that operates abnormally in the multifunction peripheral 100a and is called from the process. It is investigated whether ECS 124, MCS 125, and SRM 123, which are processes to be operated, are operating normally. If all of the ECS 124, MCS 125, and SRM 123 are normal, a message to that effect is added to the agent and transmitted to the multifunction peripheral 100a.

  When the agent application 117 of the multifunction device 100a receives the agent from the multifunction device 100b, the agent application 117 selects the fax application 113 and FCS 127 in the multifunction device 100a, and selects the ECS 124, MCS 125, and SRM 123 in the multifunction device 100b. To do. As a result, facsimile transmission is performed from the multifunction peripheral 100b in which the ECS process 124 is operating normally.

  When the selection of the process is completed in the multifunction peripheral 100a, the facsimile transmission process is executed as follows. FIG. 22 is a data sequence diagram illustrating a flow of inter-process communication in the multifunction peripheral 100a and the multifunction peripheral 100b.

  The agent application 117 of the multifunction peripheral 100a transmits a fax transmission request message to the fax application 127 in the multifunction peripheral 100a (step S1400). Upon receiving the fax transmission request message, the fax application 127 executes a transmission start request method and transmits a transmission start request message to the FCS process 127 (step S1401).

  When the FCS process 127 of the multifunction peripheral 100a receives a transmission start request message from the fax application process 113, it executes a transmission start method and adds a job operation mode setting request message to the agent. Then, the agent application 117 transmits the agent to the network address of the multifunction peripheral 100b (step S1402). Accordingly, the job operation mode setting message is transmitted to the multi-function peripheral 100b designated by the network address by the agent.

  In the multifunction peripheral 100b, the agent application 117 receives the agent, and transmits a job operation mode setting request message described in the agent to the ECS process 124 (step S1403). Upon receiving the job operation mode setting request message, the ECS process 124 of the multifunction peripheral 100b executes the job operation mode setting method to set the operation mode of the printer job, adds the execution result message to the agent, and uses the agent application 117. The agent is transmitted to the multifunction peripheral 100a (step S1404).

  The multi-function device 100a receives the agent from the multi-function device 100b by the agent application 117, and transmits an execution result message described in the agent to the FCS process 127 (step S1405). When the FCS process 127 receives the execution result message, it executes the job start request method and adds the job start request message to the agent. The agent application 117 transmits an agent to the multifunction peripheral 100b (step S1406).

  In the multifunction peripheral 100b, the agent application 117 receives the agent, and transmits a job start request message described in the agent to the ECS process 124 (step S1407). When receiving the job start request message, the ECS process 124 of the multifunction peripheral 100b executes the job start method to start the printer job, adds the execution result message to the agent, and the agent application 117 adds the agent to the multifunction peripheral. It transmits to 100a (step S1408).

  In the MFP 100a, the agent application 117 receives the agent from the MFP 100b, and transmits an execution result message described in the agent to the FCS process 127 (step S1409).

  On the other hand, in the MFP 100b, the ECS process 124 executes the memory allocation request method and transmits a memory allocation request message to the MCS process 125 in the MFP 100b (step S1410). Further, in order to acquire resources of the scanner engine, a resource acquisition request method is executed, and a resource acquisition request message is transmitted to the SRM process 123 in the multi-function peripheral 100b (step S1411). The processing of the MCS process 125 and the SRM process 123 with respect to the reception of the message is the same as the operation described in the first embodiment, and thus the description thereof is omitted. Upon receiving the resource acquisition execution result message, the ECS process 124 of the multifunction device 100b executes the scan parameter confirmation request method to add the scan parameter confirmation request message to the agent, and the agent application 117 causes the agent to the multifunction device 100a. Transmit (step S1412).

  In the MFP 100a, the agent application 117 receives the agent, and transmits a scan parameter confirmation request message described in the agent to the FCS process 127 (step S1413). When the FCS process 127 receives this scan parameter confirmation request message, the FCS process 127 adds a scan parameter message to the agent, and transmits the agent to the multifunction peripheral 100b by the agent application 117 (step S1414). The multifunction device 100b receives the agent transmitted from the multifunction device 100a by the agent application 117, and transmits the scan parameter message described in the agent to the ECS process 124 (step S1415).

  The subsequent inter-process communication is performed within the same multi-function peripheral 100b and is the same as the facsimile transmission operation described in the first embodiment, and thus the description thereof is omitted. Thus, in response to the facsimile transmission start request in the multifunction device 100a, the multifunction device 100b performs facsimile transmission.

  When the scanning and facsimile transmission processing in the multifunction device 100b is completed, the ECS process 124 of the multifunction device 100b adds a scan completion notification message to the agent, and the agent application 117 transmits the agent to the multifunction device 100a (step S1416). In the MFP 100a, the agent application 117 receives this agent, and transmits a scan end notification message described in the agent to the FCS process 127 (step S1417).

  In the multifunction device 100a, the agent application 117 adds the execution result of facsimile transmission to the agent, and transmits this agent to the multifunction device 100b (step S1418). The agent application 117 of the multifunction peripheral 100b receives this agent and transfers it to the PC 900 (step S1419). When the agent is received by the PC 900, the facsimile transmission operation is completed.

  In the third embodiment, the case where a necessary process is operating normally in the multifunction device 100b has been described. However, if there is an abnormality in a necessary process in the multifunction device 100b, the agent application 117 It is transmitted to another multifunction device on the network, for example, the multifunction device 100c, and the same processing as the processing in the multifunction device 100b is performed.

  Further, in the MFPs 100a and 100b according to the third embodiment, the case where the ECS process 124 is not operating normally has been described as an example. However, when there is an abnormality in another control service or application process, there is no existence. In this case, the same processing is performed. In this case, the MFP may be a multi-function peripheral in which a control service exists but no application other than the agent application 117 exists.

  Here, processing when the agent application 117 is not used will be described. FIG. 21 is a schematic diagram illustrating an example of a fax transmission request exchange from the user's PC to the multifunction peripherals 100a and 100b when the agent function is not used.

  As shown in FIG. 21, when a user makes a fax transmission request from the PC 900 to the multifunction peripheral 100a and a necessary process such as the ECS 124 is not operating normally, the multifunction peripheral 100a to the PC 900 In response to this, (2) a response message indicating that fax transmission is not possible is transmitted.

  Therefore, the user needs to make a (3) fax transmission request from the PC 900 to another multifunction peripheral 100b. When all processes necessary for fax transmission are operating normally in the multifunction device 100b, fax transmission is performed and (4) a completion notification is transmitted from the multifunction device 100b to the PC 900. If fax transmission is impossible even with 100b, the user needs to make a fax transmission request to another multifunction device, and the user's operation becomes extremely complicated. Further, if the fax transmission request is repeated, the network 901 is occupied between the PC 900 and the multifunction peripherals 100a and 100b, and the network load becomes excessive.

  On the other hand, when the agent and the agent application 117 are used as in the MFP 100a according to the third embodiment shown in FIG. 20, the user of the PC 900 assigns one agent in which a fax transmission request is described to the MFP 100a. Even if the multifunction device 100a cannot send a fax, the agent application 117 can autonomously send a multifunction device in the network that can send a fax as described above. Thus, the searched multifunction device 100b performs fax transmission, so that services of various multifunction devices can be efficiently provided to the user.

  In addition, since the number of times of network access between the PC 900 and the multifunction peripherals 100a and 100b is only two times when the first service request is transmitted and the last completion notification, the load on the network is also reduced.

  In the MFPs 100a and 100b of the third embodiment, the agent application 117 is provided as the agent processing means of the present invention. However, a process corresponding to the agent processing means may be provided in the control service layer instead of the application layer. good. In this case, separately from the existing control service, for example, an agent control service is provided to configure the agent processing means, and for example, an existing control service process such as the SCS 122 may be provided with a thread for performing an agent process. .

  Further, in the third embodiment, the contents of the agent shown in FIGS. 17 and 20 show an example, and can be arbitrarily described by the configuration and function of the multifunction peripheral 100 or the configuration of the network 901. It is. Further, the description format of the agent is not limited to the agent example of the third embodiment, and any format may be used depending on the type of the agent engine 902 or the agent application 117 of the PC 900.

  The present invention is not limited to the specifically disclosed embodiments, and various modifications and changes can be made within the scope of the present invention.

1 is a block diagram illustrating a configuration of a multifunction machine according to an embodiment of the invention. FIG. 3 is a block diagram illustrating a relationship between a server process and a client process that operate on the multifunction peripheral according to the first embodiment. FIG. 7 is an explanatory diagram illustrating methods that are defined in advance in each object of each application and each control service in the multifunction peripheral according to the first embodiment. 6 is an explanatory diagram illustrating a data sequence between processes of a printer application, ECS, MCS, and SRM when a printer operation is performed by the multifunction peripheral according to the first embodiment. FIG. 4 is an explanatory diagram illustrating a data sequence between processes of a scanner application, ECS, MCS, and SRM when a scanner operation is performed in the multifunction peripheral according to the first embodiment. FIG. 6 is an explanatory diagram showing a data sequence between processes of a copy application, ECS, MCS, and SRM when a copying operation is performed in the multifunction peripheral according to the first embodiment. FIG. 6 is an explanatory diagram illustrating a data sequence between processes of a fax application, FCS, ECS, MCS, and SRM when a facsimile transmission operation is performed in the multifunction peripheral according to the first embodiment. FIG. 6 is a block diagram illustrating in detail a relationship between a server process and a client process operating on the multifunction peripheral according to the second embodiment. FIG. 10 is a block diagram illustrating a functional configuration of a communication program generation apparatus (stub generator) for an image forming apparatus that generates a client process and a server process according to Embodiment 2. FIG. It is explanatory drawing which shows the example of description of a message file. It is explanatory drawing which shows an example of the client stub produced | generated by the stub generator. It is explanatory drawing which shows an example of the server skeleton produced | generated by a stub generator. It is explanatory drawing which shows an example of the header produced | generated by a stub generator. It is a flowchart of a production | generation process of a server skeleton, a client stub, and a header. It is explanatory drawing which shows the sequence of a call and a response with a server program when a function call is performed from a client program. FIG. 6 is a block diagram illustrating a configuration of a multifunction machine according to a third embodiment. FIG. 10 is a schematic diagram illustrating an example of an exchange between a user's PC and a multifunction machine in a third embodiment. FIG. 5 is a schematic diagram illustrating an example of an exchange between a user's PC and a multifunction peripheral when an agent function is not used. FIG. 10 is an explanatory diagram illustrating a flow of inter-process communication in a multifunction machine according to a third embodiment. FIG. 10 is a schematic diagram illustrating an example of an exchange between a user's PC and a multifunction machine in a third embodiment. FIG. 10 is a schematic diagram illustrating an example of exchange of a fax transmission request from a user's PC to a multifunction device when an agent function is not used. FIG. 10 is a data sequence diagram illustrating a flow of inter-process communication in the multifunction machine according to the third embodiment and other multifunction machines.

Explanation of symbols

100, 100a, 100b, 100c MFP 101 Monochrome line printer 102 Color line printer 103 Scanner 104 Facsimile 105 Hard disk (HDD)
106 Network interface 110 Software group 111 Printer application 112 Copy application 113 Fax application 114 Scanner application 115 Net file application 116 Process inspection application 120 Platform 121 General-purpose OS
122 SCS
123 SRM
124 ECS
125 MCS
126 OCS
127 FCS
128 NCS
129 FCUH
130 Application 201, 1600 Client process 202, 1610, 1620 Server process 900 PC
901 Network 902 Agent engine 1601, 1613, 1623 Thread 1602 Client stub 1603 Client dispatcher 1611, 1621 Server dispatcher 1612, 1622 Server skeleton

Claims (11)

An image forming apparatus having hardware resources used in image forming processing, and one or a plurality of programs for performing processing of user service and control service related to image formation,
Agent processing means for receiving an agent including one or a plurality of service requests, selecting one or a plurality of the control services for each service request of the agent, and making a service request for the selected control services An image forming apparatus.   The agent processing means determines whether or not a control service required for the service request is operating normally. If the service is not operating normally, the agent processing unit sends the agent to another image forming apparatus connected via a network. The image forming apparatus according to claim 1, wherein the image forming apparatus transmits the image.   The agent processing means further selects one or a plurality of the user services for each service request, and makes a service request for the selected user services. Image forming apparatus.   The agent processing means determines whether or not the user service required for the service request is operating normally. If the user service is not operating normally, the agent processing means is connected to another image forming apparatus connected via a network. The image forming apparatus according to claim 3, wherein:   The image forming apparatus according to claim 1, further comprising an agent application included in the user service and operating as the agent processing unit.   The control service operates as a server process for a client process that operates in another image forming apparatus connected via a network, and defines one or a plurality of services provided to the client process of the other image forming apparatus The image forming apparatus according to claim 1, wherein the image forming apparatus is an object having   7. The image according to claim 6, wherein each process of the control service generates one or a plurality of threads for executing a method defining a service provided to a client process of the other image forming apparatus. Forming equipment.   8. The image forming apparatus according to claim 6, wherein the control service operates as a server process using a user service operating on the other image forming apparatus as a client process.   9. The image forming apparatus according to claim 6, wherein the control service operates as a server process using a control service operating on the other image forming apparatus as a client process.   The image forming apparatus according to claim 6, wherein the control service operates as a client process using a control service that operates on the other image forming apparatus as a server process. There is an inter-process communication method for performing process communication in an image forming apparatus having hardware resources used in image forming processing and one or a plurality of programs for processing user service and control service related to image forming,
An agent receiving step for receiving an agent including one or more service requests;
And an agent processing step of selecting one or a plurality of control service processes for each service request of the agent and making a service request for the selected control service process. Communication method.

Images