JP2012230694A - Data processor and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accelerate display in a client device by efficiently using a cache memory even if a place or a time zone, where the client device is used, changes, about screen data frequently changing when executing an application program, in a server based computing system.SOLUTION: A server device stores and manages data given with priority according to a use frequency in each identifier of screen information by use places and use time zones of a client device as a screen cache priority table together with a screen cache, and controls such that synchronization with the screen cache of the client device is performed. The client device determines deletion data in the screen cache according to the priority of the screen information, and deletes them.

Description

  According to the present invention, a client device that makes a service request to a server device that operates an application program and a server device that operates an application program based on a service request from the client device can be connected to each other via a network. The present invention relates to a configured server-based computing system.

  In a server-based computing system, a server device executes an application program for a client device to create display data and sends it to the client device. In the client device, operation information such as a user's key and mouse device is sent to the server device via the network, and the display data for the client device created on the server device side is received and displayed. The client device only needs to include an input device such as a network device, a display device, a mouse device, and a keyboard. Since no data is stored in the client device, a storage device such as a hard disk is not required, and an application program is executed. Since this is not performed, the processing load required for the client device is light.

  However, since the client device waits for the display data of the screen transmitted from the server device, if the frequently displayed screen data is not in the cache in the memory of the client device, it takes longer time than usual to display the screen. It was. Therefore, frequently used screens from the client device or server device are registered in advance in the cache of the client device, and the registered screens are frequently used by managing the cache so that they are not deleted from the cache of the client device. The screen is read from the cache of the client device to reduce the network traffic and speed up the display of the screen (for example, see Patent Document 1).

JP 2002-251373 A

  In the method of Patent Document 1, it is necessary to select and register in advance screen data for cache designation on the server device side in units of screens. Then, the cache data deletion process in the client device is performed according to the deletion flag set on the server device side. As a result, if there is a lot of cache data that cannot be deleted, it will be difficult to register new cache data. If there is a lot of cache data that can be deleted, the cache data that can be used will decrease after the cache is deleted to secure memory. As a result, there is a problem that the cache usage efficiency is poor.

  In particular, when executing an application program for browsing a Web page, various screen data are displayed with reference to various URLs (Uniform Resource Locators), and thus such frequently changing screen data is limited. There has been a demand for efficient and automatic caching within the memory capacity and speeding up the display using the cache data efficiently.

  In addition, there are portable types of client devices, and the user moves to various places with the client device, for example, in the morning, head office A and B operations, and in the afternoon to branch offices C business However, there are cases where it is used for various business operations, and it has been demanded to increase the probability of cache data hitting even in such a usage form.

  An object of the present invention is to display screen data that changes frequently during execution of an application program on the client device by efficiently using the cache memory even if the location or time zone in which the client device is used changes. It is to speed up.

  The server device according to claim 1 is a server device that operates a program based on a service request from a client device via a network and transmits screen information corresponding to the service request to the client device. Screen cache storage means for storing the screen information as a screen cache for each identifier of the screen information for each client device, and data with a priority according to the usage frequency for each identifier of the screen information as a screen cache priority table Priority table storage means for storing each client device according to usage location and usage time zone, receiving means for receiving operation data from the client device, and a program for executing the program according to the received operation data and generating screen information Execution means and the screen information in the screen information. Screen cache generation means for generating screen cache data to which an identifier is added, and a screen cache priority with a priority according to the frequency of use for each identifier of the screen information for each usage location and usage period of the client device A priority table generating means for generating table data, and if the screen information does not exist in the screen cache, the screen information is generated by the priority table generating means corresponding to the identifier of the screen information and the identifier. And a transmission means for adding the priority of the screen cache priority table to the client apparatus.

  The server apparatus according to claim 2, wherein the priority table storage unit stores data of the screen cache priority table by date, and the priority table generation unit performs the previous day prior to the processing of the current day. The screen cache priority table data and the screen cache priority table data used on the previous day are prioritized according to a total value.

  The client device according to claim 3 is a client device that makes a service request to a server device connected via a network and receives screen information in accordance with an operation of a program corresponding to the service request. A screen cache storage unit that stores the screen information as a screen cache for each identifier of information, and a priority table that stores data with a priority according to the use frequency for each identifier of the screen information as a screen cache priority table Storage means; transmission means for transmitting operation data to the server apparatus; reception means for receiving the screen information, the identifier of the screen information and the priority of the screen information from the server apparatus; and the received screen information If the identifier of the screen cache is new, the screen cache identifier in which the identifier of the screen information is added to the screen information. Screen cache generation means for generating data, and if the received identifier of the screen information is new, a screen cache priority table in which priority is given to each identifier of the screen information according to the priority of the received screen information In this addition, if the storage capacity for generating the screen cache data is insufficient, the screen cache data is deleted in ascending order of priority and the screen cache priority is added. Priority table updating means for deleting the corresponding data in the degree table, and if the received identifier of the screen information exists in the screen cache, the screen information corresponding to the identifier of the screen information is extracted from the screen cache If the identifier of the received screen information does not exist in the screen cache, the received image is displayed. It is characterized by comprising display means for displaying information.

  5. The client device according to claim 4, wherein when the location or time zone of the client device changes, the priority table update unit sets the data priority of the screen cache priority table to the lowest value. It is characterized by that.

  According to a fifth aspect of the present invention, there is provided a server-based computing system comprising: a client device that makes a service request to a server device that operates a program; and a server device that operates a program based on a service request from the client device. In the server-based computing system configured to be mutually connectable via the screen, the server device stores the screen information for each client device as a screen cache for each identifier of the screen information, and the screen Priority table storage means for storing data with priority according to usage frequency for each identifier of information as a screen cache priority table for each usage location and usage time zone of the client device, and operation data from the client device Receive Receiving means; program executing means for executing the program according to the received operation data to generate screen information; screen cache generating means for generating screen cache data in which an identifier of screen information is added to the screen information; Priority table generation means for generating data of a screen cache priority table with a priority according to the usage frequency for each identifier of the screen information for each usage location and usage time zone of the client device, and the screen information is a screen cache If the screen information does not exist, the screen information is added with the identifier of the screen information and the priority of the screen cache priority table generated by the priority table generation unit corresponding to the identifier, and transmitted to the client device And the client device is arranged for each identifier of the screen information. Screen cache storage means for storing screen information as a screen cache, priority table storage means for storing data with a priority according to usage frequency for each identifier of the screen information as a screen cache priority table, and the server Transmitting means for transmitting operation data to the apparatus, receiving means for receiving the screen information, the identifier of the screen information, and the priority of the screen information from the server apparatus; and if the identifier of the received screen information is new Screen cache generation means for generating the data of the screen cache with the screen information identifier added to the screen information, and if the received identifier of the screen information is new, according to the priority of the received screen information, When adding screen cache priority table data with priorities assigned to each screen information identifier In addition, when the storage capacity for generating the screen cache data is insufficient, the screen cache data is deleted in ascending order of priority, and the corresponding data in the screen cache priority table is deleted. When the identifier of the received screen information exists in the screen cache, the screen information corresponding to the identifier of the screen information is extracted from the screen cache and displayed, and the received screen information When the identifier does not exist in the screen cache, display means for displaying the received screen information is provided.

  The server device program according to claim 6 is a server device computer that operates a program based on a service request from a client device via a network and transmits screen information corresponding to the service request to the client device. Screen cache storage means for storing the screen information for each client device as a screen cache for each identifier of the screen information, and a screen cache priority table for assigning a priority according to the frequency of use for each identifier of the screen information Priority table storage means for storing the client device according to usage location and usage time zone, receiving means for receiving operation data from the client device, program execution for executing the program according to the received operation data and generating screen information Means, said screen information Screen cache generation means for generating screen cache data to which an identifier of screen information is added, screen cache priority with a priority according to the frequency of use for each identifier of the screen information for each usage location and usage period of the client device Priority table generating means for generating data of the degree table, and when the screen information does not exist in the screen cache, the screen information is generated by the priority table generating means corresponding to the identifier of the screen information and the identifier. It is characterized by functioning as transmission means for adding the priority of the screen cache priority table to the client apparatus.

  The client device program according to claim 7 makes a service request to a server device connected via a network, and receives a screen information in accordance with the operation of the program corresponding to the service request. Screen cache storage means for storing the screen information as a screen cache for each identifier of the screen information, a priority for storing data with a priority according to the usage frequency for each identifier of the screen information as a screen cache priority table Table storage means, transmission means for transmitting operation data to the server device, receiving means for receiving the screen information, the identifier of the screen information, and the priority of the screen information from the server device, the identifier of the received screen information If the screen information is new, the screen information identifier is added to the screen information. Screen cache generation means for generating cache data, and if the received identifier of the screen information is new, a screen cache priority table that assigns a priority to each identifier of the screen information according to the priority of the received screen information In this addition, if the storage capacity for generating the screen cache data is insufficient, the screen cache data is deleted in ascending order of priority and the screen cache priority is added. Priority table updating means for deleting the corresponding data in the degree table, and when the received identifier of the screen information exists in the screen cache, the screen information corresponding to the identifier of the screen information is extracted from the screen cache. If the identifier of the received screen information does not exist in the screen cache, it is received. It is characterized in that to function as a display means for displaying the screen information.

  According to the present invention, for screen data that frequently changes during the execution of an application program, even if the location and time zone in which the client device is used change, it is possible to speed up the display on the client device, The cache memory can be used efficiently.

1 is a block diagram showing the overall configuration of a server-based computing system according to an embodiment of the present invention. The block diagram which shows the principal part structure of the server apparatus 1 which concerns on this embodiment. The block diagram which shows the principal part structure of the client apparatus 2 which concerns on this embodiment. The figure which shows an example of the time zone table memorize | stored in RAM14 of the server apparatus 1, and RAM24 of the client apparatus 2. FIG. The figure which shows an example of screen cache 14b, 24b memorize | stored in RAM14 of the server apparatus 1 and RAM24 of the client apparatus 2. FIG. The figure which shows an example of the screen cache priority table 14c memorize | stored in RAM14 of the server apparatus 1. FIG. The figure which shows an example of the screen cache priority table 24c memorize | stored in RAM24 of the client apparatus 2. FIG. The figure which shows an example of the content of the screen cache priority table 14c in the screen cache priority table preparation process of the server apparatus 1. FIG. 5 is a flowchart showing details of screen data transmission control processing executed in the server device 1; 4 is a flowchart showing details of a subroutine “priority order calculation process” executed in the server apparatus 1; 5 is a flowchart showing details of a subroutine “screen data transmission process” executed in the server apparatus 1; 5 is a flowchart showing details of a cache deletion process executed in the server device 1; 5 is a flowchart showing details of a screen cache priority table preparation process executed in the server apparatus 1; 5 is a flowchart showing details of screen display processing executed in the client apparatus 2; 6 is a flowchart showing details of a subroutine “deletion data determination process” executed in the client apparatus 2; 6 is a flowchart showing details of a location time zone change handling process executed in the client device 2;

  Embodiments of the present invention will be described below with reference to the drawings. First, the configuration in the present embodiment will be described.

  FIG. 1 is a block diagram showing the overall configuration of a server-based computing system according to an embodiment of the present invention.

  This server-based computing system includes a server device 1 and a plurality of client devices 2 connected on a network 3 composed of a LAN (Local Area Network) or a WAN (Wide Area Network). The client device 2 is also called a thin client.

  The server device 1 has a plurality of application programs such as a document creation processing program, a spreadsheet processing program, a presentation material creation program, a mail processing program, an Internet connection processing program, and a Web browser, and is connected to the server device 1 It is activated in response to an operation input (input event) signal from the apparatus 2 and executes its processing.

  In this server device 1, for display output generated on the access source area for the client device 2 in the frame buffer 14 a for the client device 2 in accordance with the execution of the application program according to the operation input signal from the client device 2. After being compressed, the screen data is transmitted (transferred) to the client device 2 that is the access source.

  In the client device 2, the drawing data transferred from the server device 1 is decompressed and expanded in the frame buffer 25 and displayed on the display unit. That is, each client device 2 in this server-based computing system has an input function according to a user operation such as a keyboard and a mouse and an output function to an LCD display unit and a printer as main functions. The server device 1 does not have various application functions and data file management functions.

  FIG. 2 is a block diagram illustrating a configuration of main parts of the server device 1 according to the present embodiment. The server device 1 includes a CPU 11 as a computer, and a ROM 13, a RAM 14, a frame buffer RAM 15, and a display device 16 are connected to the CPU 11 via a bus 12.

  Further, an input device 17 such as a keyboard and a mouse, an external storage device 18 such as a hard disk, and a communication I / F (interface) 19 are connected to the CPU 11 via a bus 12.

  The CPU 11 controls the operation of each part of the circuit using the RAM 14 as a working memory in accordance with a system program or various application programs stored in advance in the ROM 13, and via a key input signal from the input device 17 or a communication I / F 19. The various programs are started and executed in response to a processing command signal corresponding to a user operation (input event) from the client apparatus 2 received.

  In this server device 1, various data generated in accordance with an application program activated and executed in response to an input event signal from the client device 2 is stored in the external storage device 18 in association with the user ID, for example, The display screen data is generated for each client device 2 using the terminal frame buffer 14a in the RAM 14, and after being compressed, is transferred from the communication I / F 19 to the client device 2 that is the access source. Display output.

  Note that drawing data to be displayed on the display device 16 of the server device 1 itself is generated on the frame buffer RAM 15.

  In order to speed up the display of the screen component data in the client device 2, the RAM 14 stores the screen cache 14b and the screen cache priority table 14c.

  FIG. 3 is a block diagram illustrating a configuration of main parts of the client device 2 according to the present embodiment. The client apparatus 2 includes a CPU 21 as a computer, and a ROM 23, a RAM 24, and a frame buffer RAM 25 are connected to the CPU 21 via a bus 22. The screen data written in the frame buffer RAM 25 is output to the display device 26 and displayed.

  Further, an input device 27 such as a keyboard, a mouse, a microphone, and an optical sensor, an external storage device 28 such as a hard disk, and a communication I / F (interface) 29 with the server device 1 are connected to the CPU 21 via the bus 22. The Further, the RFID reader 30 is provided, and the location information of the location where the client device 2 is used is placed in an RFID (Radio Frequency Identification) tag at the location where the client device 2 is used. The RFID reader 30 recognizes and acquires the location.

  The CPU 21 controls the operation of each part of the circuit using the RAM 24 as a working memory in accordance with a system program stored in advance in the ROM 23, and is a server device received via a key input signal from the input device 27 and the communication I / F 29. The system program is activated and executed in accordance with the application response signal from 1 and the transfer drawing data.

  In the client device 2, various data generated by executing the application program in the server device 1 is appropriately read and stored in the external storage device 28, and the display screen data generated and transferred is After the compression is decompressed, it is written in the frame buffer RAM 25 and displayed on the display device 26.

  Normally, the screen data displayed on one screen is composed of a plurality of screen component data, and is displayed for each screen component data.

  In order to speed up the display of the screen component data in the client device 2, the RAM 24 stores a screen cache 24b and a screen cache priority table 24c. The screen cache 24b of the client device 2 is managed so as to be synchronized with the screen cache 14b of the server device 1. The size of the screen cache 24b of the client device 2 is set in advance according to the usage status of the client device 2.

  Next, data used in the present embodiment will be described.

  FIG. 4 is a diagram illustrating an example of a time zone table stored in the RAM 14 of the server device 1 and the RAM 24 of the client device 2. A time zone name is assigned to each arbitrarily set time range.

  FIG. 5 is a diagram illustrating an example of screen caches 14 b and 24 b of screen component data stored in the RAM 14 of the server device 1 and the RAM 24 of the client device 2. An identifier for identifying the screen component data (cache data) is attached to each screen component data, and the identifier and the cache data are linked by a pointer. The screen cache 14b of the server apparatus 1 is managed for each client apparatus 2 in the same manner as the client frame buffer RAM 14a.

  The identifier of the screen component data, for example, uses a hash function such as MD5 (Message Digest 5), generates a fixed-length “hash value” based on the screen component data, and is unique to the screen component data. It is an identifier.

  First, the server device 1 creates screen component data, registers it in the screen cache 14 b, and transmits it to the client device 2. The screen component data received by the client device 2 is registered in the screen cache 24b. The registered screen component data is deleted by determining the screen component data to be deleted by management of the client device 2 and notifying the server device 1 of the identifier of the deleted screen component data, so that the server device 1 side and the client The screen cache on the device 2 side is synchronized.

  FIG. 6 is a diagram illustrating an example of the screen cache priority table 14 c stored in the RAM 14 of the server device 1.

  A hash value, which is an identifier of the screen component data, is registered for each time zone and place, and the usage frequency and priority are recorded for each identifier. (A) is an identifier belonging to the time zone “TimeG1” and the place name is “100”, (B) is an identifier belonging to the time zone “TimeG1” and the place name is “200”, and (C) is an identifier belonging to the time zone “ (TimeG2), identifier whose location name belongs to “100”, (D) is an identifier belonging to time zone “TimeG3” and location name is “400”, (E) is time zone “TimeG4”, and location name is “100” ”Indicates an identifier belonging to“ ”.

  FIG. 7 is a diagram illustrating an example of the screen cache priority table 24 c stored in the RAM 24 of the client device 2. A hash value that is an identifier of screen component data is registered, and a priority order is recorded for each identifier.

  Next, the operation of the server device 1 in this embodiment will be described.

  FIG. 9 is a flowchart showing details of the screen data transmission control process executed in the server device 1. The procedure until the server apparatus 1 transmits the created screen component data to the client apparatus 2 using the screen cache 14b and the screen cache priority table 14c is shown.

  First, in step S01, the location information acquired by the RFID reader 30 by the client device 2 that has requested the service is received from the client device 2. Next, it is determined whether there is screen component data to be transmitted to the client device 2 among the created screen component data. When there is no screen component data to be transmitted (step S02: No), the screen data transmission control process is terminated.

  If there is screen component data to be transmitted to the client device 2 (step S02: Yes), it is confirmed in step S03 whether the screen component data to be transmitted already exists in the screen cache 14b.

  As a result of the confirmation, if the screen component data to be transmitted does not exist in the screen cache 14b of the screen component data (step S03: No), an identifier is added to the screen component data to be transmitted to display the screen component data. Is registered in the screen cache 14b (step S04), and if the screen component data to be transmitted exists in the screen cache 14b of the screen component data (step S03: Yes), the process proceeds to the next step.

  In step S05, the time zone name is determined based on the current time and the time zone table shown in FIG. 4, and the location of the client apparatus 2 is determined based on the location information acquired in step S01.

  In step S06, the usage frequency in the screen cache priority table 14c of FIG. 6 is updated. 1 is added to the value of the use frequency of data corresponding to the determined place and time zone and having the same identifier of the screen component data to be transmitted.

  Next, the priority order in the screen cache priority table 14c of FIG. 6 is updated by a priority order calculation processing subroutine described later (step S07). Then, the screen component data, identifier, priority or identifier and priority are transmitted to the client apparatus 2 by a screen data transmission processing subroutine described later (step S08), the process returns to step S02, and the processes after step S02 are repeated. .

  FIG. 10 is a flowchart showing details of the subroutine “priority calculation processing” executed in the server device 1.

  As an example of the screen cache priority table 14c, reference is made to FIG. That is, the location of the client device 2 is “100”, the time zone name is “TimeG1”, and the identifier values are “hash value 1”, “hash value 2”, “hash value 3”, “hash value 4”. It is assumed that the data arranged in order is the target of priority calculation processing.

  First, in step S21, data having a place “100” and a time zone name “TimeG1” is extracted. As a result, data in which the identifier values are arranged in the order of “hash value 1”, “hash value 2”, “hash value 3”, and “hash value 4” is extracted.

  Next, the use frequency values of the extracted data are compared, and the data is rearranged in descending order of use frequency (step S22). Priorities are added in ascending order from 1 to data arranged in descending order of use frequency (step S23). As a result, the identifier values are arranged in the order of “hash value 3”, “hash value 1”, “hash value 2”, and “hash value 4”, so the screen cache priority table 14c is updated (step S24).

  FIG. 11 is a flowchart showing details of a subroutine “screen data transmission process” executed in the server apparatus 1. First, in step S31, it is confirmed whether or not the screen component data to be transmitted exists in the screen cache 14b. When the screen component data exists in the screen cache 14b (step S31: Yes), only the identifier and the priority order are transmitted to the client device 2 (step S32).

  If the screen component data does not exist in the screen cache 14b (step S31: No), the screen component data is compressed and converted into transmission screen component data (step S33), and the transmission screen is displayed. The identifier and priority are added to the component data and transmitted to the client device 2 (step S34).

  Since the screen cache 14b in the server device 1 has insufficient capacity if it is registered just like the screen cache 24b in the client device 2, unnecessary data is deleted while synchronizing with the screen cache 24b in the client device 2. There is a need.

  FIG. 12 is a flowchart showing details of the cache deletion process executed in the server device 1. When the server apparatus 1 receives the identifier of the cache data to be deleted from the client apparatus 2 (step S41), the server apparatus 1 searches for the cache data with the corresponding identifier (step S42), and deletes the cache data with the corresponding identifier from the screen cache 14b. (Step S43).

  Thereby, the screen cache 14b of the server apparatus 1 is kept in the same content as the screen cache 24b of the client apparatus 2 in accordance with the timing at which the cache data of the screen cache 24b of the client apparatus 2 is deleted. As a method of determining the priority order of the screen cache priority table 14c, not only the current day but also the previous day and the previous day can be reflected.

  The server cache 1 performs the screen cache priority table preparation process before the first time zone. Thereby, the usage frequency of the data for the previous day and the data for the previous day is reflected before the start of the day. The data for the past three days, the past one week, or the past one month may be reflected in addition to the previous day and the previous day.

  FIG. 13 is a flowchart showing details of the screen cache priority table preparation process executed in the server device 1.

  FIG. 8 shows an example of the contents of the screen cache priority table 14c in the screen cache priority table preparation process of the server device 1 used in this process. That is, the location of the client device 2 is “100”, the time zone name is “TimeG1”, and the identifier values are “hash value 1”, “hash value 2”, “hash value 3”, “hash value 4”. It is assumed that the data arranged in order is the target of priority calculation processing.

  First, (A) in FIG. 8 which is data for the previous day of the screen cache priority table 14c and (B) in FIG. 8 which is data for the day before are read into the work memory (step S51). Next, the usage frequency of the data for the previous day and the data for the previous day is added. As a result, the data shown in FIG. 8C is obtained (step S53).

  Here, the data is rearranged in the order of use frequency, and the priority is added in ascending order from 1 according to the rearranged order. As a result, the data shown in FIG. 8D is obtained (step S55). Returning to step S52, the processes from step S53 to S55 are repeated until there is no remaining place / time zone.

  Next, the operation of the client device 2 in this embodiment will be described.

  FIG. 14 is a flowchart showing details of screen display processing executed in the client apparatus 2. The client apparatus 2 receives the screen component data, identifier, and priority from the server apparatus 1 and uses the screen cache 24b and the screen cache priority table 24c to display the screen component data. Show.

  First, in step C01, transmission of screen data from the server apparatus 1 is waited, and the transmitted screen component data, identifier, and priority are received. When the received data is only the identifier and the priority (step C02: Yes), the cache data of the corresponding identifier is extracted from the screen cache 24b (step C03), and the usage frequency value of the screen cache priority table 24c is extracted. 1 is added and updated (step C04), and the extracted cache data is written to the frame buffer RAM 25 and displayed on the display device 26 (step C05).

  In step C02, when the received data is not only the identifier and the priority order (step C12: No), the screen component data to be newly registered is received, so there is a free area to be written to the screen cache 24b. It is confirmed whether there is any (step C06).

  If there is no free area in step C06 (step C06: No), it is necessary to secure the area, so the cache data to be deleted is determined by the deletion data determination processing subroutine described later (step C07), and the deletion is determined. The cache data with the lower priority is deleted from the screen cache 24b using the identifier as a key (step C08).

  Then, in order to synchronize with the screen cache 14b of the server apparatus 1, the deleted cache data identifier is transmitted to the server apparatus 1 (step C09).

  Next, the received screen component data is decompressed and registered in the screen cache 24b together with the identifier (step C10), and the identifier and the priority order are recorded in the screen cache priority table 24d (step C11). The component data is displayed on the display device 26 (step C12).

  If there is an empty area in step C06 (step C06: Yes), it is not necessary to secure the area, and the processing after step C10 is performed.

  FIG. 15 is a flowchart showing details of a subroutine “deleted data determination process” executed in the client apparatus 2.

  First, in step C21, the capacity of a necessary area is set based on the capacity of screen component data to be written. Next, in order to determine the screen component data to be deleted from the lowest priority, the priority order is set to the lowest as the first candidate to be deleted (step C22).

  The drawing data having the set priority order is registered in the list to be deleted (step C23). Next, the capacity of the drawing data to be deleted is added to obtain the total capacity to be deleted (step C24). Then, the capacity of the necessary area is compared with the capacity to be deleted, and it is confirmed whether or not the area has been secured (step C25).

  In step C25, if the area can be secured (step C25: Yes), the process ends. If the area cannot be secured yet (step C25: No), the priority of the candidate to be deleted is increased by one. The processes after C23 are repeated.

  When the client apparatus 2 is a portable type, the location may change depending on time. Therefore, it is necessary to confirm the location of the client device 2 and the current time zone every predetermined time.

  FIG. 16 is a flowchart showing details of the location time zone change handling process executed in the client device 2. The client device 2 stores location information in the RAM 24 when processing is started and when the location changes. Then, the change of the time zone is monitored every predetermined time by comparing the current time with the time zone table of FIG.

  First, in step C31, the location information read by the RFID reader 30 is compared with the stored location information to confirm a change in location information. Next, the change of the time zone is confirmed by comparing the current time with the time zone table of FIG. 4 (step C32).

  If the location information or time zone has changed (step C33: Yes), the priority value in the screen cache priority table 24c is set to the lowest (largest value) (step C34).

  As described above, the server apparatus 1 controls the screen cache 14b and the screen cache priority table 14c, and the client apparatus 2 controls the screen cache 24b and the screen cache priority table 24c, so that the server apparatus 1 and the client By coordinating with the device 2, it is possible to speed up the display on the client device 2 and to efficiently use the cache memory even if the place or time zone in which the client device 2 is used changes. It becomes possible.

  The processes of the server apparatus 1 and the client apparatus 2 described in the embodiment, that is, the processes shown in the flowcharts of FIGS. Has been. These programs may be stored in a recording medium such as a semiconductor memory (ROM, RAM, etc.), a magnetic disk (floppy (registered trademark) disk, hard disk, etc.), and an optical disk (CD-ROM, DVD, etc.). A part or all of the program may be stored in a recording medium provided in the server device 1 or the client device 2 and received and read via the network 3.

  The present invention is not limited to the embodiment described above, and can take various configurations or shapes without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Server apparatus 2 ... Client apparatus 3 ... Communication network 11, 21 ... CPU
12, 22 ... Bus 13, 23 ... ROM
14, 24 ... RAM
14a ... Client frame buffer 14b, 24b ... Screen cache 14c, 24c ... Screen cache priority table 15, 25 ... Frame buffer RAM
16, 26 ... Display device 17, 27 ... Input device 18, 28 ... External storage device 19, 29 ... Communication I / F
30 ... RFID reader

The present invention relates to a data processing apparatus and program for storing screen cache data .

An object of the present invention is to speed up the display of the data processing apparatus by using the key Yasshumemori efficiently.

The invention according to claim 1 is a data processing apparatus for storing screen cache data for a plurality of screens in a cache storage means, the priority storage means for storing the priority of each screen cache data, and the priority storage. A priority update means for updating the priority stored in the means according to the current use environment of the data processing device, and a screen cache for the new screen when updating the cache storage means when displaying a new screen. Cache updating means for adding data to the cache storage means, determining cache data to be deleted based on the priority of each screen cache data in the current environment, and deleting the cache data from the cache storage means It is characterized by.

The invention according to claim 4 is a data processing device for storing screen cache data for a plurality of screens in the cache storage means, the management means for managing the priority of each screen cache data for each use environment, and the management means Priority update means for updating the priority managed in accordance with the current use environment, and when controlling the update of the cache storage means when displaying a new screen, the priority of each screen cache data in the current environment Update control means for controlling to delete screen cache data having a low priority from the cache storage means based on the degree .

The invention according to claim 8 is a data processing device that receives and displays screen data, and receives cache storage means for storing screen cache data for a plurality of screens and priority information of each screen cache data. And when storing the cache data stored in the cache storage unit after receiving the screen data of the new screen, the priority storage unit is deleted based on the priority information stored in the priority storage unit. Cache update means for determining and deleting and updating the screen cache data to be deleted.

According to the present invention, the display speed of the data processing apparatus can be increased, and the cache memory can be used efficiently.

Claims (7)

A server device that operates a program based on a service request from a client device via a network and transmits screen information corresponding to the service request to the client device,
Screen cache storage means for storing the screen information for each client device as a screen cache for each identifier of the screen information;
Priority table storage means for storing data with a priority according to usage frequency for each identifier of the screen information as a screen cache priority table for each usage location and usage time zone of the client device;
Receiving means for receiving operation data from the client device;
Program execution means for executing the program according to the received operation data and generating screen information;
Screen cache generation means for generating screen cache data in which an identifier of screen information is added to the screen information;
A priority table generating means for generating data of a screen cache priority table with a priority according to the frequency of use for each identifier of the screen information for each usage location and usage time zone of the client device;
If the screen information does not exist in the screen cache, an identifier of the screen information and a priority of the screen cache priority table generated by the priority table generation unit corresponding to the identifier are added to the screen information. Transmitting means for transmitting to the client device;
A server device comprising: The priority table storage means stores data of the screen cache priority table by date,
Prior to the processing of the current day, the priority table generation means sets the priority by a total value obtained by summing up the frequency of use of the screen cache priority table data of the previous day and the data of the screen cache priority table of the previous day. wear,
The server apparatus according to claim 1. A client device that makes a service request to a server device connected via a network and receives screen information according to the operation of a program corresponding to the service request,
Screen cache storage means for storing the screen information as a screen cache for each identifier of the screen information;
A priority table storage means for storing data with a priority according to the usage frequency for each identifier of the screen information as a screen cache priority table;
Transmitting means for transmitting operation data to the server device;
Receiving means for receiving the screen information, the identifier of the screen information, and the priority of the screen information from the server device;
If the received identifier of the screen information is new, screen cache generation means for generating data of the screen cache with the screen information identifier added to the screen information;
If the received identifier of the screen information is new, the screen cache priority table data with priority given to each identifier of the screen information is added according to the priority of the received screen information. If the storage capacity for generating the screen cache data is insufficient, the priority is to delete the screen cache data in ascending order of priority and delete the corresponding data in the screen cache priority table. Table updating means;
When the received identifier of the screen information exists in the screen cache, the screen information corresponding to the identifier of the screen information is extracted from the screen cache and displayed, and the received identifier of the screen information is the screen cache Display means for displaying the received screen information,
A client device comprising: The priority table update unit sets the data priority of the screen cache priority table to the lowest value when the location or time zone of the client device changes. Client device. A server-based computer configured such that a client device that makes a service request to a server device that operates a program and a server device that operates a program based on a service request from the client device can be connected to each other via a network. Operating system,
The server device
Screen cache storage means for storing the screen information for each client device as a screen cache for each identifier of the screen information;
Priority table storage means for storing data with a priority according to usage frequency for each identifier of the screen information as a screen cache priority table for each usage location and usage time zone of the client device;
Receiving means for receiving operation data from the client device;
Program execution means for executing the program according to the received operation data and generating screen information;
Screen cache generation means for generating screen cache data in which an identifier of screen information is added to the screen information;
A priority table generating means for generating data of a screen cache priority table with a priority according to the frequency of use for each identifier of the screen information for each usage location and usage time zone of the client device;
If the screen information does not exist in the screen cache, an identifier of the screen information and a priority of the screen cache priority table generated by the priority table generation unit corresponding to the identifier are added to the screen information. Transmitting means for transmitting to the client device;
With
The client device is
Screen cache storage means for storing the screen information as a screen cache for each identifier of the screen information;
A priority table storage means for storing data with a priority according to the usage frequency for each identifier of the screen information as a screen cache priority table;
Transmitting means for transmitting operation data to the server device;
Receiving means for receiving the screen information, the identifier of the screen information, and the priority of the screen information from the server device;
If the received identifier of the screen information is new, screen cache generation means for generating data of the screen cache with the screen information identifier added to the screen information;
If the received identifier of the screen information is new, the screen cache priority table data with priority given to each identifier of the screen information is added according to the priority of the received screen information. If the storage capacity for generating the screen cache data is insufficient, the priority is to delete the screen cache data in ascending order of priority and delete the corresponding data in the screen cache priority table. Table updating means;
When the received identifier of the screen information exists in the screen cache, the screen information corresponding to the identifier of the screen information is extracted from the screen cache and displayed, and the received identifier of the screen information is the screen cache Display means for displaying the received screen information,
A server-based computing system comprising: A computer of a server device that operates a program based on a service request from a client device via a network and transmits screen information corresponding to the service request to the client device.
Screen cache storage means for storing the screen information as a screen cache for each client device for each identifier of the screen information;
Priority table storage means for storing data with a priority according to the frequency of use for each identifier of the screen information as a screen cache priority table for each usage location and usage time zone of the client device;
Receiving means for receiving operation data from the client device;
Program execution means for generating screen information by executing the program according to the received operation data;
Screen cache generation means for generating screen cache data in which an identifier of screen information is added to the screen information;
Priority table generating means for generating data of a screen cache priority table with a priority according to the frequency of use for each identifier of the screen information for each usage location and usage time zone of the client device;
If the screen information does not exist in the screen cache, an identifier of the screen information and a priority of the screen cache priority table generated by the priority table generation unit corresponding to the identifier are added to the screen information. Means for transmitting to the client device;
Program to function as. A client device computer that makes a service request to a server device connected via a network and receives screen information in accordance with the operation of a program corresponding to the service request.
Screen cache storage means for storing the screen information as a screen cache for each identifier of the screen information;
A priority table storage means for storing data with a priority according to the usage frequency for each identifier of the screen information as a screen cache priority table;
Transmitting means for transmitting operation data to the server device;
Receiving means for receiving the screen information, the identifier of the screen information, and the priority of the screen information from the server device;
If the received identifier of the screen information is new, a screen cache generating means for generating data of the screen cache in which the identifier of the screen information is added to the screen information;
If the received identifier of the screen information is new, the screen cache priority table data with priority given to each identifier of the screen information is added according to the priority of the received screen information. If the storage capacity for generating the screen cache data is insufficient, the priority is to delete the screen cache data in ascending order of priority and delete the corresponding data in the screen cache priority table. Table update means,
When the received identifier of the screen information exists in the screen cache, the screen information corresponding to the identifier of the screen information is extracted from the screen cache and displayed, and the received identifier of the screen information is the screen cache Display means for displaying the received screen information,
Program to function as.

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