JP3792343B2 - I / O destination switching system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an input / output destination switching system capable of switching an input / output control process functioning as a user interface of an application process at any time without affecting the application process side.
[0002]
[Prior art]
As a technique related to switching of the user interface, for example, there is a remote control described in JP-A-2-21354 and application program (AP) sharing described in JP-A-5-274240. With remote control, a computer can be operated from another computer, and the target screen is output to the computer that is the operation source. On the other hand, in AP sharing, the calculation result of an AP operating on a certain computer is output to a plurality of computers, so that collaborative work among a plurality of users is possible.
[0003]
In the switching system of Japanese Patent Application No. 8-229691, the screen display size can be enlarged or reduced and the input contents can be changed in accordance with the output destination computer.
[0004]
[Problems to be solved by the invention]
However, in the conventional switching system, since the input / output destination of the AP is specified when the AP is started, it is necessary to restart the AP when changing the input / output destination computer in the middle.
[0005]
For example, when a plant operation monitoring screen is displayed on a certain computer, when an abnormality occurs in the window system of the computer and the screen cannot be displayed, the operation monitoring AP is normal in the conventional switching system. In spite of the operation, it is necessary to restart the AP in order to display the subsequent operation monitoring screen. In this case, the plant monitoring process by the AP is temporarily interrupted.
[0006]
Also, in a system configuration in which the number of APs that can be output and displayed on a computer is limited to one, when an output display request from another AP is generated during the output display of one AP, It was necessary to temporarily disconnect the AP and the user interface part of the computer and connect another AP to this user interface part. In other words, even though the output destination computer is the same, every time the AP for output display is switched, the connection of the AP has to be performed again.
[0007]
Thus, the conventional switching system has a problem that the input / output destination cannot be changed while the AP is normally operated.
[0008]
In view of such problems, the present invention provides an input / output destination switching system capable of switching an input / output control process functioning as a user interface of an application process at any time without affecting the application process side. It is in.
[0009]
[Means for Solving the Problems]
According to one aspect of the present invention for achieving the above object, at least one application process and at least two input / output control processes (input / output control processes A and B) functioning as a user interface of the application process. In an input / output destination switching system used in a computer system including one or more computers capable of operating
A conversion table;
Means for connecting to both the input / output control process A and the application process to realize message exchange between them;
Means for referring to the message to be exchanged when the message exchange is being performed and determining whether the referenced message includes data specific to the input / output control process A;
Means for reading the data and registering it in the conversion table when it is determined that the referenced message contains data specific to the input / output control process A;
Means for receiving a switching instruction, connecting to both the input / output control process B and the application process, and transmitting a message for initial processing to the input / output control process B;
The response message of the message for initial processing issued from the input / output control process B is acquired, and the data unique to the input / output control process B corresponding to the data specific to the input / output control process A in the acquired message Means for determining whether or not
Means for reading out this data and registering it in the conversion table when it is determined that the acquired message contains data specific to the input / output control process B;
A message is exchanged between the input / output control process B and the application process. At this time, data unique to the input / output control process B is included in a message issued from the input / output control process B to the application process. Is included, the input / output control process A specific data corresponding to the input / output control process B specific data is stored in the message with reference to the conversion table, and the application process When data specific to the input / output control process A is included in the message issued to the input / output control process B, the conversion table is referred to correspond to the data specific to the input / output control process A. I / O control process B specific data is stored in the message The destination switching system is provided.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, some embodiments of the present invention will be described with reference to the drawings.
[0011]
<First Embodiment>
FIG. 1 is a configuration diagram of a computer system to which the input / output destination switching system of the first embodiment is applied.
[0012]
In the figure, a plurality of computers (computer # 1 10a, computer # 2 10b, program server # 1 14a, program server # 2 14b) are connected via a communication network 15. In the following text, the term “computer 10a” refers to the computer 10a itself, and the term “computer 10” refers to both the computers 10a and 10b. This description method is also used in the description of other components.
[0013]
The computer 10 includes a display device 11, a keyboard 12, and a mouse 13 in addition to a main body incorporating a CPU and a memory. The program server 14 may be configured only from the main body.
[0014]
FIG. 2 is a diagram showing a functional configuration of each device constituting the computer system of FIG.
[0015]
The computer 10 and the program server 14 each have an operating system (OS) 203 that performs process control, timer management, communication control, and the like. The input / output destination switching system (input / output destination switching system 200) of this embodiment is placed in the program server 14b. An application program (target AP 201) targeted by the input / output destination switching system 200 is placed in the program server 14a. Input / output of the target AP 201 is performed through the computer 10, and this input / output computer is changed at an arbitrary time. In this embodiment, the instruction program 204 issues this change instruction. There may be a plurality of instruction programs 204. Here, the instruction program 204a is placed in the computer 10a, and the instruction program 204b is placed in the program server 14a. Note that the program is generally called a process when placed under the management of the OS, but in the present embodiment, these are treated as synonymous because it is not necessary to clearly distinguish them. For example, the input / output destination switching system is, in other words, an input / output destination switching process, and a program for realizing this is placed in the program server 14b. A program for realizing the input / output destination switching system can be stored and carried in a storage medium such as a floppy disk in the same manner as a normal program.
[0016]
The computer 10 has an input / output control process. In the present embodiment, as an input / output control process, in accordance with a display command from the target AP 201, a window is displayed on the display device 11 or an input operation using the keyboard 12 or the mouse 13 is accepted for the window generated on the display screen. A window system 202 that transmits this as input data to the target AP 201 is used.
[0017]
The overall configuration of the computer system has been described above with reference to FIGS. 1 and 2, but this computer system limits the number of computers that are the input / output destinations of the target AP 201 to one. Therefore, when the computer 10a is selected as the input / output destination computer of the target AP 201, the computer 10b is put in a standby state or performs a process unrelated to the target AP 201. At this time, the target AP 201 assumes the display device 11a, the keyboard 12a, and the mouse 13a with respect to display screen design and input data.
[0018]
For example, it is assumed that the input / output destination computer of the target AP 201 is desired to be changed from the computer 10a to the computer 10b under such a situation setting. The reason for the change may be anything such as a system management schedule or a window system failure.
[0019]
In such a case, the input / output destination switching system 200 changes the input / output destination computer of the target AP 201 from the computer 10a to the computer 10b using various functions described below.
[0020]
When the input / output destination computer is changed, the output data of the target AP 201 is displayed on the display device 11b, and an input operation using the keyboard 12b and the mouse 13b is performed. This is different from what AP201 originally assumed.
[0021]
Therefore, the input / output destination switching system 200 absorbs the difference in the input / output environment associated with the switching of the input / output destination computer so that the operating AP 201 does not need to recognize that the input / output destination has been changed. Yes.
[0022]
FIG. 3 is a diagram showing the configuration of the input / output destination switching system 200 by function.
[0023]
The input / output destination switching system 200 is logically coupled to both the target AP 201 and the window system 202 and serves as an intermediary between these. Specifically, the output message acquisition unit functions as an interface on the target AP 201 side. 301, an input message transmission unit 303, an output message transmission unit 302 and an input message acquisition unit 304 that function as an interface on the window system 202 side, and a conversion table (output environment data conversion table 309) in which data specific to each window system is registered. And the input environment data conversion table 310), the data conversion means 307 for performing data conversion with reference to the output environment data conversion table 309, and the data conversion with reference to the input environment data conversion table 310. With a chromatography data conversion unit 308, a switching instruction receiving means 305 for receiving a switching instruction output from the instruction program 204, and a connection destination switching means 306 for switching the window system upon receipt of the switching instruction. In the output environment data conversion table 309, information related to windows displayed on the screen is mainly registered. In the input environment data conversion table 310, information related to input devices such as a keyboard and a mouse is mainly registered. The instruction program 204 is a separate program from the target AP 201, but these may be the same program. Further, an input / output destination switching instruction may be issued within the input / output destination switching system 200.
[0024]
When the output message acquisition unit 301 acquires a message (for example, a display command) from the target AP 201, it passes this to the conversion unit 307. If necessary, the conversion unit 307 converts the contents of the display command using the conversion table 309 and passes this to the output message transmission unit 302. The output message transmission unit 302 transmits the passed display command to the window system 202.
[0025]
When the input message acquisition unit 304 acquires a message (for example, input data) from the window system 202, it passes this to the conversion unit 308. If necessary, the conversion unit 308 converts the contents of the input data using the conversion table 310 and passes this to the conversion unit 307. If necessary, the conversion unit 307 converts the contents of the input data passed using the conversion table 309, and passes this to the input message transmission unit 303. The input message transmission unit 303 transmits the passed input data to the target AP 201.
[0026]
There are two types of instruction messages received by the switching instruction receiving unit 305. One is a disconnection instruction message for requesting release of the connection with the current input / output destination window system, and the other is a connection instruction message for requesting connection with the new input / output destination window system. The connection destination switching unit 306 executes processing according to the instruction.
[0027]
FIG. 4 shows a configuration example of the conversion table 309.
[0028]
In the conversion table 309, the data type 401, the window system data (temporary data) 402 to which the target AP first connected, and the window system data (actual data) 403 newly connected by switching the window system are registered. The The data type 401 represents the type of data and includes, for example, a window identifier, a pixel value, a font ID, and the like. The window identifier is an identifier given to a window when the window is created. The pixel value is a value assigned to the color to be drawn. The font ID is an identifier returned when the font is loaded. These values are likely to be different depending on the window system.
[0029]
The provisional data 402 is registered while the target AP makes an initial connection with the window system after activation, and messages are exchanged between the window system and the AP. Registered when connecting to the new window system in response to a switching instruction. These registrations are performed by the connection destination switching means 306. Although not shown, the input environment conversion table 310 has a similar structure. The data type of the input environment conversion table includes, for example, mapping that represents the correspondence between each key of the keyboard and its key code, mapping that represents the correspondence between each button of the mouse button and the generated code, and the like. These are also likely to differ depending on the window system.
[0030]
FIG. 5 is a diagram showing a flow of overall processing of the input / output destination switching system 200.
[0031]
In the target AP 201, one of the window systems 202a and 202b is defined in advance as a data input / output destination. The target AP 201 first outputs a connection request with a window system that is defined in advance as a data input / output destination.
[0032]
When the input / output destination switching system 200 receives a connection request from the target AP 201 (step 501), the input / output destination switching system 200 and the window system for which the connection is requested are issued. Logically connect (step 502). Logical connection means establishment of a connection in a communication protocol (for example, TCP / IP). When the connection is completed, the input / output destination switching system 200 waits for a message from the target AP 201, the instruction program 204, and the window system (step 503).
[0033]
When a message is received (step 504), the type of the received message is determined (step 505). There are three message types: a switching instruction message sent from the instruction program 204, an output message sent from the target AP 201, and an input message sent from the window system. In the input / output destination switching system 200, any of the input / output destination switching processing 506, the output message transmission processing 507, and the input message transmission processing 508 is executed according to the type of message. After performing the processing for the received message, the message reception waiting state is again entered (step 503).
[0034]
The above is the overall processing flow of the input / output destination switching system 200. According to this flow, for example, in step 501, if the target AP 201 in FIG. , The target AP 201, the input / output destination switching system 200, and the window system 202 a are connected. Thereafter, in step 507 and step 508, message exchange between the target AP 201 and the window system 202 a via the input / output destination switching system 200 is performed. Will be performed. At the time of this message exchange, the input / output destination switching system 200 refers to the message to be exchanged, determines whether or not a predetermined type of data is included in the referenced message, and includes the referenced message. If a predetermined type of data is included, this data is read out and registered in the conversion tables 309 and 310 as temporary data. The predetermined type of data is data unique to the window system 202a such as the window identifier, pixel value, font ID, and key code mapping described above, and these are registered in the conversion tables 309 and 310 as temporary data. .
[0035]
FIG. 6 is a flowchart showing details of the input / output destination switching processing 506. In the input / output destination switching process 506, the window system is switched.
[0036]
When the connection destination switching unit 306 receives the switching instruction message received by the switching instruction receiving unit 305 (step 601), the connection destination switching unit 306 determines the instruction content (step 602). If disconnection from the currently connected window system is instructed, it is first determined whether or not a window erase instruction has been issued to this window system (step 603). The window deletion instruction is a message issued by the target AP 201 as necessary. If there is a window deletion instruction, information about the window to be deleted is stored in a window information storage table (not shown) (step 604). When it is necessary to display the display contents of the deleted window again in the window system of the switching destination, the information in this storage table is used. Thereafter, the connection destination switching unit 306 gives a window deletion instruction to the currently connected window system, deletes the window of the window system (step 605), and disconnects the window system and the input / output destination switching system 200. (Step 606).
[0037]
If it is determined in step 603 that there is no window deletion instruction, the window being output is not deleted and the connection with the window system is left as it is. Even if the connection with the window system is maintained, the input / output destination switching system 200 does not accept an input message from the window system and does not perform an output message transmission process for the window system.
[0038]
On the other hand, if a connection instruction with a new window system is received in step 601, this is determined in step 602, and the processing described below is executed. If it is determined in step 603 that there is no window deletion instruction and step 606 is skipped, the connection with the old window system is maintained in this process as well.
[0039]
The connection destination switching unit 306 first determines whether or not the message for initial processing sent from the target AP 201 is stored in a message storage table (not shown) (step 607). When the target AP 201 is connected to the window system via the input / output destination switching system 200, first, the target AP 201 transmits a message for initial processing to the window system. The message for initial processing includes, for example, a window generation instruction, a mapping instruction for making the window actually visible on the screen, and a font load instruction. The connection destination switching unit 306 sequentially stores these messages in the message storage table while transferring the initial processing messages sent from the target AP 201 to the window system. In step 607, the connection destination switching unit 306 stores the messages in the window system before switching. Check whether the message for initial processing sent to the message storage table exists.
[0040]
If the message for initial processing is not stored, the connection destination switching unit 306 generates a message for initial processing using the library and sends it to the window system to be connected this time (step 609). On the other hand, if a message for initial processing is stored, this message is directly or processed and sent to the window system (step 608). In this way, the connection destination switching unit 306 transmits a message for initial processing to the window system to be connected instead of the target AP 201.
[0041]
After performing any of the processing in steps 608 and 609, it is determined whether or not there is a request to display the display contents of the window output by the window system before switching on the screen of the newly connected window system. (Step 610). If there is this request, a message is transmitted to the target AP 201 so as to output a redisplay instruction (step 611).
[0042]
Note that when a specific event occurs and automatic switching of the window system is executed, the switching destination window system is registered in the input / output destination switching system 200 in advance. When a specific event (for example, a timeout when a timer is applied) occurs, connection processing (steps 607 to 611) to the registered output destination is executed after disconnection processing (steps 603 to 606).
[0043]
FIG. 7 is a flowchart showing details of the initial process message transmission process.
[0044]
As described above, the initial processing message stored in the message storage table is a message transmitted when the target AP 201 first connects to the window system, but the initial processing message stored in the message storage table. Most of them are created for a window system to be connected first (that is, a window system defined in advance for the target AP).
[0045]
Therefore, when the newly connected window system has a different environment from the window system assumed by the target AP 201, it is necessary to convert the content of the message for the new window system.
[0046]
Therefore, the connection destination switching unit 306 sequentially reads the initial processing messages stored in the message storage table (step 701), and whether or not the read messages include data to be converted regarding the output environment. (Step 702), if there is data to be converted, the conversion table 309 is referred to (step 703), and the data in the message is overwritten with the actual data in the conversion table 309 (step 704). Is transmitted to the newly connected window system (step 705). It is assumed that the actual data used in step 704 is registered in the conversion table 309 in advance. The processing from step 701 to step 705 is repeated as long as there is a storage message (step 706). If it can be determined on the window system side, in step 704, the actual data of the conversion table 309 may be added to the message instead of being overwritten.
[0047]
After transmitting all the stored messages, the connection destination switching unit 306 waits for a response from the window system to the transmitted messages (step 707). When a response message from the window system is received (step 708), whether or not the response message includes the same type of data (specifically, data specific to the window system 202b) as described above. (Step 709), if data specific to the window system 202b is included, it is registered in the data conversion tables 309 and 310 as actual data (step 710). The received response message is discarded (step 711). Steps 707 to 711 are repeated until all response messages to the message transmitted to the window system are received (step 712).
[0048]
FIG. 8 is a flowchart showing details of the output message transmission processing 507.
[0049]
Here, description will be given by taking as an example a state before switching in which the input / output destination of the target AP 201 is the window system 202a and a state after switching in which the input / output destination is changed from the window system 202a to the window system 202b.
[0050]
First, the state before switching will be described.
[0051]
When receiving the message from the target AP 201 (step 801), the input / output destination switching system 200 determines whether or not the data to be converted is included in the message (step 802). The data to be converted is data specific to the window system 202a that must be converted for the window system 202b, but here, since the input / output destination is still the window system 202a, step 805 follows step 802. Is executed. In step 805, the message received in step 801 is transmitted to the window system 202a as it is. Note that sending a received message as it is means sending without performing data conversion, and in detail, a destination change process or the like is executed.
[0052]
Next, the state after switching will be described.
[0053]
The input / output destination switching system 200 receives the message from the target AP 201 (step 801), and includes the data to be converted (specifically, the same data as the temporary data in the conversion table 309) in the same manner as before. It is discriminated whether or not (step 802). Here, since the input / output destination is the window system 202b, there is a possibility that data to be converted is included in the message. When data to be converted is included in the message, the conversion table 309 is referred to (step 803), the data to be converted in the message is converted into the corresponding actual data (step 804), and this message is displayed in the window. Transmit to the system (step 805). The actual data may be overwritten on the data to be converted, but the actual data may be added to the message as long as the window system can handle it.
[0054]
By executing the output message transmission process as described above, the target AP 201 can perform normal message transmission without being aware of switching of the window system.
[0055]
FIG. 9 is a flowchart showing the input message transmission process 508. Here, conversion in the opposite direction to the conversion process described above is performed.
[0056]
When the input / output destination switching system 200 receives the message transmitted from the window system (step 901), the input / output destination switching system 200 determines whether the message contains data relating to the input environment to be converted (step 902). When data to be converted is included, the conversion table 309 is referred to (step 903), and the data in the message is converted into corresponding temporary data (step 904). Further, it is determined whether or not the received message contains data relating to the output environment to be converted (step 905). When data to be converted is included, the conversion table 310 is referred to (step 906), and the data in the message is converted into corresponding temporary data (step 907). Thereafter, the message subjected to the conversion process or the received message itself is transmitted to the target AP 201 (step 908). Note that sending the received message itself means sending without performing data conversion, and in detail, destination change processing or the like is executed.
[0057]
By executing the input message transmission process as described above, the target AP 201 can perform a normal reception process even if the window system is switched.
[0058]
As described above, according to this input / output destination switching system, the data in the message is converted in accordance with the window system of the switching destination, so that the target AP 201 performs processing without being aware of the change of the input / output destination. You can continue.
[0059]
For example, when the operation monitoring program for the target AP is placed in the program server # 1 and the operation monitoring is performed by the display device of the computer # 1, any of the window system, OS, and other programs of the computer # 1 When a failure occurs, an instruction to switch the input / output destination computer is issued from the instruction program of the program server # 1. When the switching instruction is issued, the input / output destination switching system of the program server # 2 stops the transmission of the display command to the computer # 1, ends the monitoring work on the computer # 1, and outputs it to the computer # 2. Change the destination. At this time, the target AP of the program server # 1 transmits a display command to the computer # 2 without stopping the operation, and a display corresponding to the display command is made on the window system of the computer # 2. Therefore, the user can continue to perform monitoring work on the computer # 2.
[0060]
<Second Embodiment>
A modification of the first embodiment of the present invention is shown in FIG. Here, the target AP 201a, the window system 202a, and the input / output destination switching system 200a, which are arranged in separate computers in FIG. 2, are arranged in the same computer (computer # 1 10a). These perform intra-computer communication without going through a communication network. Further, the target AP 201b and the input / output destination switching system 200b are arranged in the computer # 2 10b. The configuration of the input / output destination switching system is the same as that of the first embodiment. In the present embodiment, the number of APs connected to the window system 202a is limited to one.
[0061]
Initially, in this computer system, display output of the target AP 201a is permitted, and the target AP 201a, the input / output destination switching system 200a, and the window system 202a are mutually connected to exchange messages, and the computer 10a performs the target exchange. The output display of the AP 201a is performed. The permission of display output is issued by the instruction program 204a.
[0062]
In the middle, when the display permission of the target AP 201b is issued, the target AP 201b, the input / output destination switching system 200b, and the window system 202a are connected to each other, and the window system 202a and the input / output destination switching system 200a are disconnected. . At this time, the target AP 201a and the input / output destination switching system 200a are not disconnected. Thereafter, messages are exchanged among the target AP 201b, the input / output destination switching system 200b, and the window system 202a, and the output of the target AP 201b is displayed on the computer 10a.
[0063]
When the display permission of the target AP 201a is issued again, the window system 202a and the input / output destination switching system 200b are disconnected, and the input / output destination switching system 200a is connected to the window system 202a.
[0064]
As described above, according to the present embodiment, even if the target AP is disconnected from the window system, the input / output destination switching system is the counterpart of the disconnected target AP. There is no problem of interrupting operation.
[0065]
<Third Embodiment>
According to the third embodiment, the input / output destination switching system is virtually an input / output system.
[0066]
In FIG. 2, connection of the computer # 1 to the input / output system (window system 202a) becomes possible when the instruction program 204a of the computer # 1 permits, and the target AP 201 is connected to the window system for the subsequent processing. When the specification program 204a of the computer # 1 issues a connection permission to the window system 202a, the input / output destination switching system 200 becomes a virtual input / output window system before the computer # 1 instruction program 204a issues a connection permission to the target AP. Connect with. When the instruction program 204a of the computer # 1 permits the connection, the input / output destination switching system 200 connects to the window system 202a of the computer # 1, and transmits the output of the target AP to the window system 202a.
[0067]
FIG. 11 is a flowchart showing processing of the entire input / output destination switching system when temporary connection processing is performed.
[0068]
The difference from the flow of the first embodiment shown in FIG. 5 is that after receiving a connection request from the target AP 201 (step 501), it is confirmed whether or not connection permission for the window system as the input / output destination has been issued. (Step 111). If the connection is permitted, normal connection processing (step 502) is performed. If connection is not permitted, temporary connection request acceptance processing (step 112) is performed. The process after the connection is the same as the overall process of FIG. 5 (steps 503 to 508).
[0069]
FIG. 12 shows a flowchart of the temporary connection request acceptance process 112.
[0070]
Waiting for a message from the target AP 201 (step 121), receiving the message (step 122), determining the type of the message (step 123), and if the message is a message for initial processing related to the connection from the target AP, The message is stored (step 124). Thereafter, it is determined whether or not a response to the message is necessary (step 125). If necessary, a response message is created by the input / output destination switching system (step 126) and transmitted to the target AP 201 (step 125). 127). These processes (step 121 to step 127) are repeated until the connection permission message is received and connection is established with the input / output destination window system.
[0071]
On the other hand, if the received message is a connection permission message, an initial process message transmission process (a process similar to 608 in FIG. 7) is executed to connect to the input / output destination window system.
[0072]
As described above, since the input / output destination switching system of this embodiment functions as a substitute for the window system, the target AP can proceed without waiting for the connection with the actual window system.
[0073]
【The invention's effect】
As described above, according to the input / output destination switching system of the present invention, the input / output destination of the AP can be changed without stopping the operation of the application program (AP).
[0074]
If there are a plurality of APs and the number of APs that can be connected to the input / output destination is limited to one, the input / output destination switching system of the present invention is not connected to the input / output destination. Since the response process is executed by connecting to the AP, in this case as well, the AP can continue the operation without being aware of the connection and disconnection with the input / output destination.
[0075]
If the connection with the input / output destination is not allowed until the connection with the input / output destination is permitted, the input / output destination switching system of the present invention first connects to the AP until the connection permission is issued. When the connection permission is issued, the I / O destination switching system connects to the I / O destination. In this case, the AP operates without being aware of the connection or disconnection with the I / O destination. Will be able to continue. Since the AP is already in operation, there is an effect that it can be immediately displayed and output.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a hardware configuration of a computer system according to a first embodiment of this invention.
FIG. 2 is a configuration diagram showing a software configuration of the computer system according to the first embodiment of this invention.
FIG. 3 is a configuration diagram illustrating a functional configuration of the switching system according to the first embodiment of this invention.
FIG. 4 is a configuration diagram of a conversion table according to the first embodiment of this invention.
FIG. 5 is a flowchart of overall processing in the first embodiment of the present invention.
FIG. 6 is a flowchart of input / output destination switching processing according to the first embodiment of the present invention.
FIG. 7 is a flowchart of message transmission processing for initial processing according to the first embodiment of the present invention.
FIG. 8 is a flowchart of output message transmission processing according to the first embodiment of the present invention.
FIG. 9 is a flowchart of an input message transmission process according to the first embodiment of the present invention.
FIG. 10 is a configuration diagram showing a software configuration of a computer system according to a second embodiment of this invention.
FIG. 11 is a flowchart of overall processing in a third embodiment of the present invention.
FIG. 12 is a flowchart of temporary connection request reception processing in the third embodiment of the present invention.
[Explanation of symbols]
10: computer, 11: display device, 12: keyboard, 13: mouse, 14: program server, 15: communication network, 201: target AP, 202: window system, 203: OS, 204: instruction program, 301: output message Acquisition means, 302: Output message transmission means, 303: Input message transmission means, 304: Input message acquisition means, 305: Switching instruction reception means, 306: Connection destination switching means, 307, 308: Conversion means, 309, 310: Conversion Table

Claims (7)

Used in a computer system including at least one application process and one or more computers capable of operating at least two input / output control processes (input / output control processes A and B) functioning as a user interface of the application process Input / output destination switching system
A conversion table;
Means for connecting to both the input / output control process A and the application process to realize message exchange between them;
Means for referring to the message to be exchanged when the message exchange is being performed and determining whether the referenced message includes data unique to the input / output control process A;
Means for reading out and registering this data in the conversion table when it is determined that the referenced message includes data unique to the input / output control process A;
Means for receiving a switching instruction;
Means for connecting to both the input / output control process B and the application process when receiving the switching instruction, and transmitting a message for initial processing to the input / output control process B;
The response message of the message for initial processing issued from the input / output control process B is acquired, and the data unique to the input / output control process B corresponding to the data specific to the input / output control process A in the acquired message Means for determining whether or not
Means for reading out this data and registering it in the conversion table when it is determined that the acquired message contains data specific to the input / output control process B;
A message is exchanged between the input / output control process B and the application process. At this time, data unique to the input / output control process B is included in a message issued from the input / output control process B to the application process. Is included, the input / output control process A specific data corresponding to the input / output control process B specific data is stored in the message with reference to the conversion table, and the application process When data specific to the input / output control process A is included in the message issued to the input / output control process B, the conversion table is referred to correspond to the data specific to the input / output control process A. I / O control process B specific data is stored in the message Output destination switching system. In the input / output destination switching system according to claim 1,
Means for connecting to both the input / output control process A and the application process to realize message exchange between them,
After connecting to the application process, it waits for connection permission given from the outside. While waiting for connection permission, it determines whether or not a response is required for the message issued from the application process, and the response is necessary. If it is determined that there is, means for creating a response message and executing response processing to send to the application process;
And a means for connecting to the input / output control process A after receiving the connection permission. In the input / output destination switching system according to claim 1,
The message sent from the application process toward the input / output control process A includes an initial processing message for the input / output control process A.
Means for connecting to both the input / output control process A and the application process to realize message exchange between them,
Means for storing at least the message for initial processing among messages sent from the application process to the input / output control process A;
The means for transmitting the initial processing message is configured to perform the input / output by converting a part or all of the stored initial processing message in a state where the data part is left as it is or in the part. An input / output destination switching system, wherein the input / output control process B is transmitted to the input / output control process B as an initial processing message for the control process B. In an input / output destination switching system used in a computer system including at least one application process and one or more computers capable of operating at least two input / output control processes functioning as a user interface of the application process,
Means for accepting a connection request message, logically combining one of the two input / output control processes, the input / output destination switching system, and the application process;
A conversion table;
After the logical connection is performed by accepting the connection request message, a message transmitted and received between the one input / output control process and the application process is referred to, and a predetermined type of message is referred to. Means for determining whether data is included;
Means for registering the data in the conversion table as pre-switching data when it is determined that the referenced message includes data of a predetermined type;
Means for receiving a switching instruction;
When the switching instruction is received, the logical connection between the one input / output control process and the input / output destination switching system is released or left as it is, and the input / output destination switching system and the input / output destination switching system Means for logically coupling the other input / output control process of the two input / output control processes and the input / output destination switching system, while maintaining a logical connection with the application process;
After the logical combination by the switching request message is performed, a message transmitted from the other input / output control process to the application process is acquired, and the message is referred to. Means for determining whether data of the same type as the determined type is included;
Means for registering the data in the conversion table as post-switching data when the referenced message contains the same type of data as the predetermined type;
After registration of the post-switch data, a message sent from the application process to the other input / output control process is obtained, referenced, and the same message as the pre-switch data is referenced. Means for determining whether data is included;
When it is determined that the same data as the pre-switching data is included in the referenced message, the post-switching data corresponding to the pre-switching data is read from the conversion table, and the acquired message is the read post-switching data. And a means for adding the read post-switching data to the message and transmitting the message to the other input / output control process as the destination. Input / output switching system. One or a plurality of windows are displayed on the display screen, and a plurality of computers having an input / output control process for controlling data input / output with respect to the windows displayed on the display screen are connected via a communication network. In an input / output destination switching system used in a computer system in which a message is transmitted / received between an application process installed in another computer connected to a communication network and an input / output control process of any of the plurality of computers ,
A conversion table;
When transmitting / receiving a message between one input / output control process (input / output control process A) of the plurality of input / output control processes and the application process, and when the transmission / reception is performed The message to be transmitted / received is referred to, and it is determined whether or not the data referred to by the input / output control process A is included in the referred message, and the data referred to by the input / output control process A is included in the referred message. A first process for registering this data in the conversion table when it is determined that
Realizing message exchange between the application process and an input / output control process (referred to as input / output control process B) other than the input / output control process A among the plurality of input / output control processes, When a message issued from the input / output control process B to the application process includes data unique to the input / output control process B, the data is registered in the conversion table and the conversion is performed. Referring to the table, data specific to input / output control process A corresponding to data specific to input / output control process B is stored in the message, and issued from the application process to input / output control process B The message contains data specific to I / O control process A. If it is, the conversion table can be referenced to execute the second process of storing the data specific to the input / output control process B corresponding to the data specific to the input / output control process A in the message Means,
An input / output destination switching system comprising: means for selectively executing the first process and the second process in response to a given instruction. In the input / output destination switching system according to claim 5,
An input / output destination switching system further comprising means for displaying the same content as the display content of the window before switching in the window after switching when switching between the first processing and the second processing. One or a plurality of windows are displayed on the display screen, and a plurality of computers having an input / output control process for controlling data input / output with respect to the windows displayed on the display screen are connected via a communication network. An input / output destination switching program used in a computer system in which a message is transmitted and received between an application process installed in another computer connected to a communication network and an input / output control process of any of the plurality of computers A recorded recording medium,
The input / output destination switching program includes a conversion table,
When transmitting / receiving a message between one input / output control process (input / output control process A) of the plurality of input / output control processes and the application process, and when the transmission / reception is performed The message to be transmitted / received is referred to, and it is determined whether or not the data referred to by the input / output control process A is included in the referred message, and the data referred to by the input / output control process A is included in the referred message. A first process for registering this data in the conversion table when it is determined that
Realizing message exchange between the application process and an input / output control process (referred to as input / output control process B) other than the input / output control process A among the plurality of input / output control processes, When a message issued from the input / output control process B to the application process includes data unique to the input / output control process B, the data is registered in the conversion table and the conversion is performed. Referring to the table, data specific to input / output control process A corresponding to data specific to input / output control process B is stored in the message, and issued from the application process to input / output control process B The message contains data specific to I / O control process A. The second table for storing the data specific to the input / output control process B corresponding to the data specific to the input / output control process A with reference to the conversion table. Recording medium on which an input / output destination switching program for selectively executing in accordance with the received instruction is recorded.

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