JP2010238114A - Communication system, server and communication control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain automatic creation of a look-ahead list to enhance the speed and efficiency of Web application execution processing while reducing the workload of a developer. <P>SOLUTION: The server 10 includes an access information generation and storage unit 13 which generates, for each Web application, user access information to a file name the transmission of which is requested and stores it; a look-ahead list generation unit 14 which generates a look-ahead list for each Web application; a look-ahead list transmission unit 16 which transmits, in response to a look-ahead list request for a certain Web application, a look-ahead list of the Web application to the requester. The look-ahead list generation unit 14 selects, in response to a look-ahead list request from a target user, files to be described on the look-ahead list based on the transmitting request frequency of each file, which is obtained from user access information of other users than the target user, and generates a look-ahead list describing the selected file names. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a communication system including a communication terminal and a server, a communication control method executed in the communication system, and a server configuring the communication system.

  While an application is being executed on a communication terminal, a process in which the application requests a file uniquely identified by a URL (Uniform Resource Locator) from the server via the network and downloads the file from the server is generally widely performed. It has been broken. Note that, as described above, an application that requests a server for a file required during execution is generally called a “web application”. However, since it takes a considerable amount of processing time to download a file from a server to a communication terminal via a network, in order to increase the processing speed and efficiency, a file that is expected to be used during execution of a web application is stored in advance. A process (so-called prefetch cache process) that is downloaded from a server to a communication terminal and stored in a cache memory is widely known.

  In the prefetch cache processing, a prefetch list in which identification information of a target file is described is prepared for each web application in advance, and the target file is read from the server based on the prefetch list of the web application when the web application is started. It was common to download to a communication terminal and store in a cache memory.

JP 2000-250803 A

  However, conventionally, the developer of each web application had to create a look-ahead list in anticipation of files that are expected to be frequently used during the execution of the web application. For this reason, the developer's workload required to create the look-ahead list was large.

  In addition, because the look-ahead list is created based on the predictions made by the developer, the files that are frequently used during web application execution do not match the files listed in the look-ahead list. In such a case, it is difficult to increase the speed and efficiency of the execution process of the web application.

  The present invention has been made to solve the above-mentioned problems, and realizes automatic creation of a prefetch list, speeding up and improving the efficiency of web application execution processing while reducing the workload of web application developers. It aims to plan.

  In order to achieve the above object, a communication system according to the present invention can be connected to a server storing and managing a plurality of files used when executing a web application and the server via a network. A communication system including one or more communication terminals, wherein the communication terminal is pre-read for execution of the web application at a predetermined timing during activation and execution of the cache memory and the web application. A prefetch list requesting unit for requesting the server a prefetch list in which file names to be received are received; a prefetch list receiving and storing unit for receiving and storing the prefetch list of the web application from the server; and a file described in the prefetch list A prefetch file request part for sending a transmission request to the server; A prefetch file reception storage unit that receives a file transmitted from a server in response to a transmission request by the prefetch file request unit and stores the file in the cache memory, and a file requested from the web application during execution of the web application is the cache memory. A determination unit that determines whether or not the requested file is stored, and if the requested file is stored, the requested file is read from the cache memory and passed to the web application, and the requested file is A cache control unit that, if not saved, sends a request to send the requested file to the server, receives the requested file from the server, stores it in the cache memory, and passes it to the web application; With the front The server is based on a reception unit that receives a transmission request for a file from the communication terminal, a transmission unit that transmits the file requested to be transmitted to a requesting communication terminal, and transmission requests from a plurality of received communication terminals. An access information generating / storing unit for generating and storing user access information for the requested file name for each web application, and a prefetch list for generating a prefetch list for each web application based on the stored user access information A generation unit, a storage unit that stores a prefetch list for each generated web application, and when a prefetch list for a web application is requested from the communication terminal, the prefetch list for the web application is read from the storage unit , A look-ahead squirrel to be transmitted to the communication terminal And a transmitter.

  As another aspect, the following communication system using a user ID for specifying a user of a communication terminal is also effective for achieving the above object. That is, a communication system according to the present invention includes a server that stores and manages a plurality of files used when executing a web application, and one or more communication terminals that can be connected to the server via a network. The communication terminal includes a cache memory and a file name to be pre-read for execution of the web application at a predetermined timing during activation and execution of the web application. A prefetch list requesting unit that requests a prefetch list from the server, a prefetch list reception storage unit that receives and stores the prefetch list of the web application from the server, and a transmission request for a file described in the prefetch list together with a user ID A prefetch file request section to be transmitted to the server; A prefetch file reception storage unit that receives a file transmitted from a server in response to a transmission request by the file request unit and stores the file in the cache memory, and a file requested from the web application during execution of the web application is stored in the cache memory. A determination unit that determines whether or not the requested file is stored, and if the requested file is stored, the requested file is read from the cache memory and passed to the web application, and the requested file is If not stored, the cache control transmits the requested file transmission request together with a user ID to the server, receives the requested file from the server, stores it in the cache memory, and passes it to the web application Part The server includes: a receiving unit that receives a file transmission request and a user ID from the communication terminal; a transmission unit that transmits the file requested to be transmitted to a requesting communication terminal; Based on a transmission request from a communication terminal, an access information generation / storage unit that generates and stores user access information in which a user ID is associated with a file name requested to be transmitted for each web application, and the stored user access information A prefetch list generation unit for generating a prefetch list for each web application, a storage unit for storing the prefetch list for each generated web application, and a prefetch list for a web application requested from the communication terminal. The pre-reading list for the web application A prefetch list transmission unit that reads from the communication unit and transmits to the communication terminal.

  In the above communication system, the server includes a prefetch list generation unit, and the prefetch list generation unit automatically generates a prefetch list for each web application based on the user access information. There are various variations of the prefetch list generation method as follows.

  For example, the prefetch list generation unit describes, in response to a prefetch list request from a certain target user, the prefetch list based on the transmission request frequency for each file obtained from user access information of other users other than the target user. A file to be selected is selected, and a prefetch list in which the selected file name is described can be generated.

  Further, the prefetch list generation unit, in response to a prefetch list request from a certain target user, the access tendency obtained from the user access information among other users other than the target user is the target user's access tendency according to a predetermined criterion. One or more other users similar to the above are identified, and the file to be listed in the prefetch list is selected and selected based on the transmission request frequency for each file for the one or more other similar users A look-ahead list describing file names can be generated.

  Further, the prefetch list generation unit, in response to a prefetch list request from a certain target user, a file to be described in the prefetch list based on the transmission request frequency for each file obtained from the past user access information of the target user. And a prefetch list in which the selected file name is described can be generated.

  By the way, the invention related to the communication system as described above can also be regarded as an invention related to a server, and can be described as follows.

  The server according to the present invention is a server that stores and manages a plurality of files used when executing a web application, the receiving unit receiving a file transmission request from a communication terminal, and the file requested to be transmitted Information is generated for each web application and stored for each web application based on a transmission request from a plurality of received communication terminals and a transmission unit that transmits the request to the requesting communication terminal. About a storage unit, a prefetch list generation unit that generates a prefetch list for each web application based on the stored user access information, a storage unit that stores a prefetch list for each generated web application, and a certain web application When the communication terminal requests a prefetch list of Read prefetch list for blanking the application from the storage unit, characterized in that it comprises a pre-read list transmitting unit that transmits to the communication terminal.

  Further, as another aspect, the following server using a user ID for specifying a user of a communication terminal is also effective for achieving the above object. That is, the server according to the present invention is a server that stores and manages a plurality of files used when executing a web application, and includes a receiving unit that receives a file transmission request and a user ID from a communication terminal, and a transmission User access information in which a transmission unit that transmits the requested file to a requesting communication terminal and a user ID and a file name requested to be transmitted are associated with each other based on the received transmission requests from a plurality of communication terminals Generating and storing an access information for each web application, a prefetch list generating unit for generating a prefetch list for each web application based on the stored user access information, and a prefetch for each generated web application Saver to save the list and prefetch list for a web application If requested by the communication terminal, reads out the read-ahead list for the web application from the storage unit, characterized in that it comprises a pre-read list transmitting unit that transmits to the communication terminal.

  There are various variations of the prefetching list generation method by the prefetching list generation unit provided in the server as described below.

  For example, the prefetch list generation unit describes, in response to a prefetch list request from a certain target user, the prefetch list based on the transmission request frequency for each file obtained from user access information of other users other than the target user. A file to be selected is selected, and a prefetch list in which the selected file name is described can be generated.

  Further, the prefetch list generation unit, in response to a prefetch list request from a certain target user, the access tendency obtained from the user access information among other users other than the target user is the target user's access tendency according to a predetermined criterion. One or more other users similar to the above are identified, and the file to be listed in the prefetch list is selected and selected based on the transmission request frequency for each file for the one or more other similar users A look-ahead list describing file names can be generated.

  Further, the prefetch list generation unit, in response to a prefetch list request from a certain target user, a file to be described in the prefetch list based on the transmission request frequency for each file obtained from the past user access information of the target user. And a prefetch list in which the selected file name is described can be generated.

  By the way, the invention relating to the server as described above can also be regarded as an invention relating to a communication control method executed by the server, and can be described as follows.

  A communication control method according to the present invention is a communication control method executed by a server that stores and manages a plurality of files used when executing a web application, and receives a file transmission request from a communication terminal. Based on the reception step, the transmission step of transmitting the requested file to the requesting communication terminal, and the received transmission requests from the plurality of communication terminals, the user access information for the requested file name is transmitted to the web. An access information generation and storage step for generating and storing for each application, a prefetch list generation step for generating a prefetch list for each web application based on the stored user access information, and a prefetch list for each generated web application. A save step to save and a web application A prefetch list transmission step of reading the prefetch list for the web application saved in the saving step and transmitting the prefetch list to the communication terminal when a prefetch list for the application is requested from the communication terminal. To do.

  As another aspect, the following communication control method using a user ID for specifying a user of a communication terminal is also effective for achieving the above object. That is, the communication control method according to the present invention is a communication control method executed by a server that stores and manages a plurality of files used when executing a web application, and includes a file transmission request from a communication terminal and Based on the reception step of receiving the user ID, the transmission step of transmitting the requested file to the requesting communication terminal, and the transmission request from the plurality of received communication terminals, the user ID and the transmission request are made. An access information generation and storage step for generating and storing user access information associated with a file name for each web application, and a prefetch list generation step for generating a prefetch list for each web application based on the stored user access information And a look-ahead list for each generated web application A pre-reading list for the web application stored in the storing step when the pre-reading list for the web application is requested from the communication terminal, and a pre-reading list transmission step for transmitting to the communication terminal; It is characterized by providing.

  According to the communication system, the server, and the communication control method according to the present invention described above, the server can automatically generate a prefetch list for each web application based on the user access information. It is possible to speed up and improve the efficiency of web application execution processing while reducing the workload of the user.

  According to the present invention, it is possible to automatically create a prefetch list and reduce the work load of a web application developer, while at the same time increasing the speed and efficiency of web application execution processing.

It is a system configuration figure of the 1st-3rd embodiment. It is a hardware block diagram of a server and a communication terminal. It is a flowchart which shows the process performed with the communication system of 1st Embodiment. It is a figure for demonstrating the process of FIG. It is a flowchart which shows the process performed with the communication system of 2nd Embodiment. It is a figure for demonstrating the process of FIG. It is a flowchart which shows the first half of the process performed with the communication system of 3rd Embodiment. It is a flowchart which shows the second half of the process performed with the communication system of 3rd Embodiment. It is a figure for demonstrating the process of FIG. 7 and FIG.

Hereinafter, Embodiments 1 to 3 according to the present invention will be described in order with reference to the drawings.
[Embodiment 1]
In the first embodiment, a mode in which a prefetch list is generated based on the transmission request frequency for each file obtained from user access information of other users than the target user will be described. In the following, a case where a user ID for specifying a user of a communication terminal is used is illustrated (the same applies to the second and third embodiments).

  As shown in FIG. 1, the communication system 1 according to the first embodiment includes a server 10 that stores and manages an enormous amount of files and a communication terminal 30, and these are mutually connected via a network 20. It is possible to connect to.

  First, the configuration of the communication terminal 30 will be described. The communication terminal 30 includes a cache memory 31, a prefetch list request unit 32, a prefetch list reception storage unit 33, a prefetch file request unit 34, a prefetch file reception storage unit 35, a determination unit 36, and a cache control unit 37.

  Among these, the prefetch list request unit 32 requests the server 10 for a prefetch list in which file names to be prefetched for executing the web application are described at predetermined timings when the web application is activated and being executed. The prefetch list reception storage unit 33 receives and stores the prefetch list of the web application from the server 10. The prefetch file request unit 34 sends a transmission request for a file described in the prefetch list to the server 10 together with the user ID.

  The prefetch file reception storage unit 35 receives a file transmitted from the server 10 in response to a transmission request from the prefetch file request unit 34 and stores it in the cache memory 31. The determination unit 36 determines whether a file requested by the web application is stored in the cache memory 31 during execution of the web application.

  The cache control unit 37 passes a file requested from the running web application to the web application. More specifically, when the file requested by the determination by the determination unit 36 is stored in the cache memory 31, the cache control unit 37 reads the requested file from the cache memory 31 and passes it to the web application. On the other hand, when the file requested by the determination by the determination unit 36 is not stored in the cache memory 31, the cache control unit 37 transmits a request for transmitting the requested file to the server 10 together with the user ID, and the requested The file is received from the server 10, stored in the cache memory 31, and passed to the web application.

  FIG. 2B shows an example of the hardware configuration of the communication terminal 30. The communication terminal 30 includes, as a hardware configuration, a CPU 30A, a RAM 30B, a ROM 30C, an input device 30D such as a keyboard and a mouse that are input devices, a communication device 30E that communicates with an external device, a cache memory 30F, An output device 30G such as a display or a printer as an output device is provided, and no special hardware configuration is required. The function of each functional block of the communication terminal 30 described above is to read a predetermined program into the RAM 30B, etc., operate the input device 30D, the communication device 30E, and the output device 30G under the control of the CPU 30A, and to the cache memory 30F etc. It is executed by reading and writing data. Such a hardware configuration of the communication terminal 30 is the same in Embodiments 2 and 3 described later.

  Next, the configuration of the server 10 will be described. As shown in FIG. 1, the server 10 receives a file database 17 that stores a huge amount of files, a file management unit 18 that manages file input / output to the file database 17, a file request from the communication terminal 30, and the like. A receiving unit 11 for receiving, a transmitting unit 12 for transmitting the requested file to the communication terminal 30, an access information generating and storing unit 13, a prefetch list generating unit 14, a storing unit 15, and a prefetch list transmitting unit 16, Is provided.

  Of these, the access information generation / save unit 13 generates, for each web application, user access information in which the user ID is associated with the file name requested to be transmitted based on the received transmission requests from the plurality of communication terminals. save. The prefetch list generation unit 14 generates a prefetch list for each web application based on the stored user access information. As described above, in the first embodiment, the prefetch list generation unit 14 generates a prefetch list based on the transmission request frequency for each file obtained from the user access information of users other than the target user.

  The storage unit 15 stores a prefetch list for each generated web application. When the prefetch list for a certain web application is requested from the communication terminal 30, the prefetch list transmission unit 16 reads the prefetch list for the web application from the storage unit 15 and transmits it to the communication terminal 30.

  FIG. 2A shows an example of the hardware configuration of the server 10. The server 10 includes, as a hardware configuration, a CPU 10A, a RAM 10B, a ROM 10C, an input device 10D such as a keyboard and a mouse that are input devices, a communication device 10E that communicates with an external device, and a huge amount of files. An auxiliary storage device 10F for storing and an output device 10G such as a display or a printer as an output device are provided, and no special hardware configuration is required. The function of each functional block of the server 10 described above is to read a predetermined program into the RAM 10B, etc., operate the input device 10D, the communication device 10E, and the output device 10G under the control of the CPU 10A, and to the auxiliary storage device 10F, etc. It is executed by reading and writing data. Such a hardware configuration of the server 10 is the same in the second and third embodiments described later.

  Then, the process performed in the communication system 1 of 1st Embodiment is demonstrated using FIG. Here, a communication terminal of user A (hereinafter referred to as “terminal A”), a communication terminal of user B (hereinafter referred to as “terminal B”), and a communication terminal of user C (hereinafter referred to as “terminal C”) In a situation where a prefetch list is requested from the server 10, the prefetch list generation unit 14 of the server 10 generates a prefetch list for the user C based on the transmission request frequency for each file obtained from the user access information of the users A and B. The case to do is explained. In FIG. 3, the web application is abbreviated as “application”.

  First, a certain web application (hereinafter referred to as “target web application”) is started in the terminal A, and the prefetch list requesting unit 32 generates a prefetch list in which the file name to be prefetched for executing the target web application is described. (Step T1 in FIG. 3).

  In the server 10, when the receiving unit 11 receives the request (step S1), the prefetch list transmission unit 16 reads the prefetch list of the target web application from the storage unit 15 and transmits it to the terminal A. However, here, it is assumed that the prefetch list of the target web application is not stored in the storage unit 15. Therefore, the prefetch list transmission unit 16 transmits an empty prefetch list to the terminal A (step S2).

  In the terminal A, when the prefetch list reception storage unit 33 receives an empty prefetch list (step T2), since the received prefetch list is empty, a file to be prefetched is not requested at this time.

  Thereafter, when the target web application being executed requests a file, the determination unit 36 determines whether the requested file is stored in the cache memory 31 (step T3). If the requested file is stored in the cache memory 31, the cache control unit 37 reads the file from the cache memory 31 and passes it to the target web application (step T6). However, here, the requested file is a file whose download source address is URL1 (hereinafter referred to as “URL1 file”) and a file whose download source address is URL2 (hereinafter referred to as “URL2 file”). 2), and these are not stored in the cache memory 31. Therefore, it is determined that the file is not stored in step T3, and the cache control unit 37 transmits a transmission request for the requested file (files of URL 1 and 2) to the server 10 together with the user ID of the user A (step T4).

  In the server 10, when the receiving unit 11 receives the transmission request (step S3), the file management unit 18 reads the files of the URLs 1 and 2 from the file database 17 and transmits them to the terminal A (step S4). Based on the transmission request, the access information generation / save unit 13 then transmits the user ID (user A) and the file name requested for transmission (here, “URL1”, which is the address of the download source for convenience of identification, User access information in association with “URL 2” is generated and stored (step S5). For example, as shown in FIG. 4A, user access information in which “user A” is associated with “URL1” and “URL2” is generated and stored.

  In the terminal A, the cache control unit 37 receives the requested files (files of URLs 1 and 2) from the server 10, stores the files of URLs 1 and 2 in the cache memory 31, and passes them to the running web application ( Step T5).

  Next, the processes of steps T1 to T6 and S1 to S5 described above are similarly executed between the terminal B and the server 10. Here, a duplicate description is omitted. However, it is assumed that the same web application (target web application) being executed on the terminal B requests the file of URL3 in addition to the files of URL1 and 2. Accordingly, in step S5, the access information generation / save unit 13 associates the user ID (user B) with the requested file name (URL1, URL2, URL3) based on the transmission request from the terminal B. Generate and store user access information. For example, as shown in FIG. 4B, user access information in which “user A” is associated with “URL1”, “URL2”, and “URL3” is generated and stored.

  As a result, as shown in FIG. 4B, user access information for a plurality of users (users A and B) is stored as user access information related to the target web application.

  Therefore, in the server 10, the prefetch list generation unit 14 generates a prefetch list based on the transmission request frequency for each file obtained from the user access information of a plurality of users (step S6). Here, in order to make the explanation easy to understand, the prefetch list generation unit 14 describes, in the prefetch list, the files (URLs 1 and 2 surrounded by a thick line in FIG. 4C) that are requested to be transmitted from all the plural users. Select as a file to be generated, and generate a prefetch list describing the selected files (URL1, 2). Then, the generated prefetch list is stored by the storage unit 15 (step S7).

  Thereafter, in the terminal C, the target web application is activated, and the prefetch list request unit 32 requests the server 10 for a prefetch list for executing the target web application (step T7).

  In the server 10, when the receiving unit 11 receives the request (step S8), the prefetch list transmitting unit 16 reads the prefetch list of the target web application (that is, the prefetch list in which the URLs 1 and 2 are described) from the storage unit 15. Transmit to terminal C (step S9).

  In the terminal C, the prefetch list reception storage unit 33 receives and stores the prefetch list (step T8). Since this time it is not an empty prefetch list, a file to be prefetched is requested as follows. That is, the prefetch file request unit 34 sends a transmission request for the files (here, URLs 1 and 2) described in the prefetch list to the server 10 together with the user ID (user C) (step T9).

  In the server 10, when the receiving unit 11 receives the transmission request (step S10), the file management unit 18 reads out the files of the URLs 1 and 2 requested for transmission from the file database 17 and transmits them to the terminal C (step S11). ).

  In the terminal C, the prefetch file reception storage unit 35 receives the files (files of URLs 1 and 2) transmitted from the server 10 in response to the transmission request by the prefetch file request unit 34 and stores them in the cache memory 31 (step T10). .

  According to the first embodiment described above, when viewed from the user C, the prefetch list can be automatically generated based on the transmission request frequency for each file obtained from the user access information of the other users A and B. . Further, the terminal C can automatically receive and store the generated prefetch list and the files described in the prefetch list.

[Embodiment 2]
In the second embodiment, a mode in which a prefetch list is generated based on the transmission request frequency for each file obtained from the past user access information of the target user will be described.

  Since the configuration of the communication system, the configuration of the server, and the communication terminal in the second embodiment are the same as the configuration of the first embodiment (FIG. 1), description thereof is omitted here.

  However, the prefetch list generation unit 14 of the server 10 generates a prefetch list based on the transmission request frequency for each file obtained from the past user access information of the target user. This point is different from the first embodiment.

  Then, the process performed in the communication system 1 of 2nd Embodiment is demonstrated using FIG. Here, in the communication terminal 30 of the user A (hereinafter referred to as “terminal A”), the prefetch list is sent to the server 10 three times in total at a predetermined timing when the same web application (target web application) is started or is being executed. Assume a situation that requires In this situation, a case where the prefetch list generation unit 14 of the server 10 generates a prefetch list based on the transmission request frequency for each file obtained from the user access information for the past two times for the user A will be described. In FIG. 5, the web application is abbreviated as “application”.

  First, in the terminal A, the target web application is activated, and the prefetch list requesting unit 32 requests the server 10 for a prefetch list in which file names to be prefetched for executing the target web application are requested (step T21 in FIG. 5). ).

  In the server 10, when the receiving unit 11 receives the request (step S21), the prefetch list transmission unit 16 reads the prefetch list of the target web application from the storage unit 15 and transmits it to the terminal A. However, here, it is assumed that the prefetch list of the target web application is not stored in the storage unit 15. Therefore, the prefetch list transmission unit 16 transmits an empty prefetch list to the terminal A (step S22).

  In the terminal A, when the prefetch list reception storage unit 33 receives an empty prefetch list (step T22), since the received prefetch list is empty, a file to be prefetched is not requested at this time.

  Thereafter, when the target web application being executed requests a file, the determination unit 36 determines whether the requested file is stored in the cache memory 31 (step T23). If the requested file is stored in the cache memory 31, the cache control unit 37 reads the file from the cache memory 31 and passes it to the target web application (step T26). However, here, the requested file is a file whose URL is the download source (URL1 file), a file whose URL is the download source (URL2 file), and the address of the download source is URL3. It is assumed that there are three files (URL3 file), and these are not stored in the cache memory 31. Therefore, it is determined that the file is not stored in step T23, and the cache control unit 37 transmits a request for transmitting the requested file (files of URLs 1, 2, and 3) to the server 10 together with the user ID of the user A (step T24). ).

  In the server 10, when the receiving unit 11 receives the transmission request (step S23), the file management unit 18 reads the files of the URLs 1, 2, and 3 from the file database 17 and transmits them to the terminal A (step S24). Based on the transmission request, the access information generation / save unit 13 then transmits the user ID and the number of requests and the file name requested to be transmitted (here, “URL1”, “URL1”, User access information that associates “URL2” and “URL3” is generated and stored (step S25). For example, as shown in FIG. 6A, user access information in which “user A (first time)” is associated with “URL1”, “URL2”, and “URL3” is generated and stored.

  In the terminal A, the cache control unit 37 receives the requested files (files of URLs 1, 2, and 3) from the server 10, stores the files of URLs 1, 2, and 3 in the cache memory 31, and executes the web being executed. It is passed to the application (step T25).

  Next, it is assumed that the target web application is activated again in the terminal A after a while. At this time, the prefetch list request unit 32 of the terminal A requests the prefetch list related to the target web application again to the server 10 (step T21 in FIG. 5). Thereafter, the processes of steps S21 to S25 and T22 to T26 described above are executed similarly. Here, a duplicate description is omitted.

  However, the second time, it is assumed that the target web application requests files of URLs 2, 3, and 4. Therefore, in step S25, the access information generation / save unit 13 generates user access information in which the user ID and the number of requests are associated with the file name requested for transmission based on the second transmission request from the terminal A. And save. For example, as shown in FIG. 6B, user access information in which “user A (second time)” is associated with “URL2”, “URL3”, and “URL4” is generated and stored.

  As a result, as shown in FIG. 6B, the user access information about the first time and the second time of the user A is stored as the user access information related to the target web application.

  Therefore, in the server 10, the prefetch list generation unit 14 generates a prefetch list based on the transmission request frequency for each file obtained from the user access information of the user A multiple times (step S26). Here, in order to make the explanation easy to understand, the prefetch list generation unit 14 should describe the files common to a plurality of transmission requests (URLs 2 and 3 surrounded by bold lines in FIG. 6C) in the prefetch list. Select as a file, and generate a prefetch list describing the selected files (URL2, 3). Then, the generated prefetch list is stored by the storage unit 15 (step S27).

  Thereafter, in the terminal A, the target web application is activated again, and the prefetch list request unit 32 requests the server 10 for a prefetch list for executing the target web application again (step T27).

  In the server 10, when the receiving unit 11 receives the request (step S28), the prefetch list transmitting unit 16 reads the prefetch list of the target web application (that is, the prefetch list in which the URLs 2 and 3 are described) from the storage unit 15. Transmit to terminal A (step S29).

  In terminal A, the prefetch list receiving / storing unit 33 receives and stores the prefetch list (step T28). Since this time it is not an empty prefetch list, a file to be prefetched is requested as follows. That is, the prefetch file request unit 34 sends a transmission request for the files (here, URLs 2 and 3) described in the prefetch list to the server 10 together with the user ID (user A) (step T29).

  In the server 10, when the receiving unit 11 receives the transmission request (step S30), the file management unit 18 reads the files of the URLs 2 and 3 requested to be transmitted from the file database 17 and transmits them to the terminal A (step S31). ).

  In the terminal A, the prefetch file reception storage unit 35 receives the files (files of URLs 2 and 3) transmitted from the server 10 in response to the transmission request by the prefetch file request unit 34 and stores them in the cache memory 31 (step T30). .

  According to the second embodiment described above, the prefetch list can be automatically generated based on the transmission request frequency for each file obtained from the past user access information of the same user A. Further, the terminal A can automatically receive and store the generated prefetch list and the files described in the prefetch list.

[Embodiment 3]
In the third embodiment, a mode in which a prefetch list is generated based on the transmission request frequency for each file related to similar users (other users whose access tendency is similar to the target user) will be described.

  The configuration of the communication system, the configuration of the server, and the communication terminal in the third embodiment are the same as the configuration of the first embodiment (FIG. 1), and thus the description thereof is omitted here.

  However, the prefetch list generation unit 14 of the server 10 generates a prefetch list based on the transmission request frequency for each file related to similar users (other users whose access tendency is similar to the target user). This point is different from the first and second embodiments.

  Then, the process performed in the communication system 1 of 3rd Embodiment is demonstrated using FIG. 7, FIG. Here, the communication terminal of user A (terminal A), the communication terminal of user B (terminal B), and the communication terminal of user C (terminal C) have already made file transmission requests to the server 10 in order, and FIG. It is assumed that the user access information shown in (a) is generated and stored by the access information generation / storage unit 13 of the server 10. In such a situation, the same web application (target web application) is activated in the communication terminal (terminal D) of the user D, the terminal D requests the server 10 for a prefetch list, and the prefetch list generation unit 14 of the server 10 A case will be described in which a prefetch list is generated based on a transmission request frequency for each file related to a similar user of user D (another user whose access tendency is similar to user D). In FIG. 7 and FIG. 8, the web application is abbreviated as “application”.

  First, in the terminal D, the target web application is activated, and the prefetch list requesting unit 32 requests the server 10 for a prefetch list in which file names to be prefetched for executing the target web application are requested (step T41 in FIG. 7). .

  In the server 10, when the receiving unit 11 receives the request (step S41), the prefetch list transmission unit 16 reads the prefetch list of the target web application from the storage unit 15 and transmits it to the terminal D. However, here, it is assumed that the prefetch list of the target web application is not stored in the storage unit 15. Therefore, the prefetch list transmission unit 16 transmits an empty prefetch list to the terminal D (step S42).

  In the terminal D, when the prefetch list reception storage unit 33 receives an empty prefetch list (step T42), since the received prefetch list is empty, a file to be prefetched is not requested at this time.

  Thereafter, it is assumed that the target web application being executed requests a file whose download source address is URL1 (hereinafter referred to as “file of URL1” or “file 1”). Here, the determination unit 36 determines whether or not the requested file 1 is stored in the cache memory 31 (step T43). If the file 1 is stored in the cache memory 31, the cache control unit 37 reads the file 1 from the cache memory 31 and passes it to the target web application (step T46). However, here, it is assumed that the file 1 is not stored in the cache memory 31. Therefore, it is determined that the file is not saved in step T43, and the cache control unit 37 transmits the transmission request for the file 1 to the server 10 together with the user ID of the user D (step T44).

  In the server 10, when the receiving unit 11 receives the transmission request (step S43), the file management unit 18 reads the file 1 from the file database 17 and transmits it to the terminal D (step S44). Then, the access information generation / save unit 13 generates and stores user access information in which the user ID (user D) is associated with the file name (file 1) requested to be transmitted based on the transmission request (step S1). S45). For example, as shown in FIG. 9B, user access information in which “user D” is associated with “URL 1” corresponding to file 1 is generated and stored.

  In the terminal D, the cache control unit 37 receives the file 1 from the server 10, stores the file 1 in the cache memory 31, and passes it to the target web application being executed (step T45).

  On the other hand, in the server 10, the prefetch list generation unit 14 generates a prefetch list based on the transmission request frequency for each file related to a similar user of the user D (another user whose access tendency is similar to the user D) (step S46). . Specifically, like the user D, another user who has requested the file 1 is set as a similar user to the user D. As shown in FIG. 9B, other users who have requested the file 1 include the user A and the user B, but here, as an example, the user 1 and the user B later on the file 1 later in time series. The user B who is the requesting user (that is, the user who requested the file 1 at a later time) is set as a similar user of the user D. Then, the prefetch list generation unit 14 selects the files 1 and 2 (URLs 1 and 2 in FIG. 9B) requested by the user B as files to be described in the prefetch list, and the selected files 1 and 2 are selected. Generate the look-ahead list described. The generated prefetch list is stored by the storage unit 15 (step S47).

  Thereafter, in the terminal D, when the target web application is started again, or when a predetermined prefetch list request timing arrives during execution of the target web application, the prefetch list request unit 32 performs prefetching for executing the target web application. A list is requested from the server 10 (step T47).

  In the server 10, when the receiving unit 11 receives the request (step S48), the prefetch list transmission unit 16 reads the prefetch list of the target web application (that is, the prefetch list in which the files 1 and 2 are described) from the storage unit 15. To terminal D (step S49).

  In the terminal D, the prefetch list reception storage unit 33 receives and stores the prefetch list (step T48). Since it is not an empty prefetch list this time, the prefetch file request unit 34 sends a transmission request for the files 1 and 2 described in the prefetch list to the server 10 together with the user ID (user D) (step T49).

  In the server 10, when the receiving unit 11 receives the transmission request (step S50), the file management unit 18 reads the files 1 and 2 requested to be transmitted from the file database 17 and transmits them to the terminal D (step S51).

  In the terminal D, the prefetch file reception storage unit 35 receives the files 1 and 2 transmitted from the server 10 in response to the transmission request from the prefetch file request unit 34 and stores them in the cache memory 31 (step T50).

  Thereafter, it is assumed that the target web application being executed requests a file whose download source address is URL3 (hereinafter referred to as “file of URL3” or “file 3”). Here, the determination unit 36 determines whether or not the requested file 3 is stored in the cache memory 31 (step T51). If the file 3 is stored in the cache memory 31, the cache control unit 37 reads the file 3 from the cache memory 31 and passes it to the target web application (step T54). However, here, it is assumed that the file 3 is not stored in the cache memory 31. Therefore, it is determined that the file is not stored in step T51, and the cache control unit 37 transmits the transmission request for the file 3 to the server 10 together with the user ID of the user D (step T52).

  In the server 10, when the receiving unit 11 receives the transmission request (step S52), the file management unit 18 reads the file 3 from the file database 17 and transmits it to the terminal D (step S53). Then, the access information generation / save unit 13 generates and stores user access information in which the user ID (user D) is associated with the file name (file 3) requested to be transmitted based on the transmission request (step S40). S54). For example, as shown in FIG. 9C, user access information in which “user D” is associated with “URL 3” corresponding to file 3 is generated and stored.

  In the terminal D, the cache control unit 37 receives the file 3 from the server 10, stores the file 3 in the cache memory 31, and passes it to the target web application being executed (step T53).

  On the other hand, in the server 10, the prefetch list generation unit 14 generates a prefetch list based on the transmission request frequency for each file related to a similar user of the user D (another user whose access tendency is similar to the user D) (step S55). . Specifically, similar to the user D, another user who has requested the file 3 is a similar user of the user D. Since only the user A is the other user who requested the file 3 as shown in FIG. 9C, the user A is a user similar to the user D. Then, the prefetch list generation unit 14 selects the files 1, 3, and 5 (URLs 1, 3, and 5 in FIG. 9C) requested by the user A as files to be written in the prefetch list, and selects the selected file. A prefetch list describing 1, 3, and 5 is generated. The generated prefetch list is stored by the storage unit 15 (step S56).

  Thereafter, in the terminal D, when the target web application is started again, or when a predetermined prefetch list request timing arrives during execution of the target web application, the prefetch list request unit 32 performs prefetching for executing the target web application. A list is requested from the server 10 (step T55).

  In the server 10, when the receiving unit 11 receives the request (step S57), the prefetch list transmitting unit 16 stores the prefetch list of the target web application (that is, the prefetch list in which the files 1, 3, and 5 are described). Are read out and transmitted to the terminal D (step S58).

  In the terminal D, the prefetch list reception storage unit 33 receives and stores the prefetch list (step T56). Since it is not an empty prefetch list again, the prefetch file request unit 34 sends a transmission request for the files 1, 3, 5 described in the prefetch list to the server 10 together with the user ID (user D) (step T57). ).

  In the server 10, when the receiving unit 11 receives the transmission request (step S59), the file management unit 18 reads the files 1, 3, and 5 requested to be transmitted from the file database 17 and transmits them to the terminal D (step S60). ).

  In the terminal D, the prefetch file reception storage unit 35 receives the files 1, 3, and 5 transmitted from the server 10 in response to the transmission request by the prefetch file request unit 34 and stores them in the cache memory 31 (step T58).

  According to the third embodiment described above, the prefetch list can be automatically generated based on the transmission request frequency for each file obtained from the user access information of the similar user viewed from the user D. Further, the terminal D can automatically receive and store the generated prefetch list and the files described in the prefetch list.

  As an effect common to the first to third embodiments, an effect that a prefetch list for each web application can be automatically generated based on user access information, and a web application can be realized by automatically creating a prefetch list. The effect is that it is possible to increase the speed and efficiency of web application execution processing while reducing the developer's workload.

  In the third embodiment, the prefetch list generation unit 14 defines one user as a similar user. However, a group of a plurality of users may be defined as a similar user. For example, in FIG. 9C, the prefetch list generation unit 14 determines a group including users (users A and B) who have requested transmission of at least one of the files 1 and 3, and the users A and B belonging to the group. Select one of the files 1, 2, 3, and 5 that are requested to be sent as a file to be written in the prefetch list, and generate a prefetch list that describes the selected files 1, 2, 3, and 5. Also good.

  Moreover, in said Embodiment 1-3, although the case using the user ID for specifying the user of a communication terminal was illustrated, this invention is effective also in the case where a user ID is not used. For example, the access frequency for the files constituting the web application is obtained without specifying the user, and a prefetch list is generated and stored based on the access frequency. When a pre-read list transmission request is received from an arbitrary user, the stored pre-read list can be returned in response to the transmission request. Even in such a case, the same effects as those of the first to third embodiments can be obtained.

DESCRIPTION OF SYMBOLS 1 ... Communication system, 10 ... Server, 10A ... CPU, 10B ... RAM, 10C ... ROM, 10D ... Input device, 10E ... Communication device, 10F ... Auxiliary storage device, 10G ... Output device, 11 ... Reception part, 12 ... Transmission , 13 ... access information generation and storage unit, 14 ... prefetch list generation unit, 15 ... storage unit, 16 ... prefetch list transmission unit, 17 ... file database, 18 ... file management unit, 20 ... network, 30 ... communication terminal, 30A ... CPU, 30B ... RAM, 30C ... ROM, 30D ... input device, 30E ... communication device, 30F ... cache memory, 30G ... output device, 31 ... cache memory, 32 ... prefetch list request section, 33 ... prefetch list reception storage section , 34 ... Prefetch file request section, 35 ... Prefetch file reception storage section, 36 ... Determination section, 37 ... Cache system Part.

Claims (12)

A communication system including a server that stores and manages a plurality of files used when executing a web application, and one or more communication terminals that are connectable to the server via a network. There,
The communication terminal is
Cache memory,
A prefetch list requesting unit that requests a prefetch list in which a file name to be prefetched for execution of the web application is requested to the server at a predetermined timing during startup and execution of the web application;
A prefetch list reception storage unit that receives and stores the prefetch list of the web application from the server;
A prefetch file request unit for sending a transmission request for a file described in the prefetch list to the server;
A prefetch file reception storage unit that receives a file transmitted from a server in response to a transmission request by the prefetch file request unit and stores the file in the cache memory;
A determination unit that determines whether a file requested by the web application during execution of the web application is stored in the cache memory;
If the requested file is saved, the requested file is read from the cache memory and passed to the web application, and if the requested file is not saved, the requested file transmission request A cache controller that receives the requested file from the server and stores it in the cache memory and passes it to the web application;
With
The server
A receiving unit that receives a file transmission request from the communication terminal;
A transmission unit for transmitting the requested file to the requesting communication terminal;
An access information generating / storing unit that generates and stores user access information for each requested file name based on transmission requests from a plurality of received communication terminals;
Based on the stored user access information, a prefetch list generation unit that generates a prefetch list for each web application;
A storage unit for storing a prefetch list for each generated web application;
When a prefetch list for a certain web application is requested from the communication terminal, the prefetch list for the web application is read from the storage unit and transmitted to the communication terminal;
A communication system comprising: A communication system including a server that stores and manages a plurality of files used when executing a web application, and one or more communication terminals that are connectable to the server via a network. There,
The communication terminal is
Cache memory,
A prefetch list requesting unit that requests a prefetch list in which a file name to be prefetched for execution of the web application is requested to the server at a predetermined timing during startup and execution of the web application;
A prefetch list reception storage unit that receives and stores the prefetch list of the web application from the server;
A prefetch file request unit for sending a transmission request for a file described in the prefetch list to the server together with a user ID;
A prefetch file reception storage unit that receives a file transmitted from a server in response to a transmission request by the prefetch file request unit and stores the file in the cache memory;
A determination unit that determines whether a file requested by the web application during execution of the web application is stored in the cache memory;
If the requested file is saved, the requested file is read from the cache memory and passed to the web application, and if the requested file is not saved, the requested file transmission request A cache control unit that transmits the requested file to the server together with the user ID, receives the requested file from the server, stores the file in the cache memory, and passes the file to the web application;
With
The server
A receiving unit for receiving a file transmission request and a user ID from the communication terminal;
A transmission unit for transmitting the requested file to the requesting communication terminal;
Based on the received transmission requests from a plurality of communication terminals, an access information generation and storage unit that generates and stores user access information for each web application in association with user IDs and file names requested to be transmitted;
Based on the stored user access information, a prefetch list generation unit that generates a prefetch list for each web application;
A storage unit for storing a prefetch list for each generated web application;
When a prefetch list for a certain web application is requested from the communication terminal, the prefetch list for the web application is read from the storage unit and transmitted to the communication terminal;
A communication system comprising: The prefetch list generation unit
In response to a request for the look-ahead list from a target user,
Based on the transmission request frequency for each file obtained from user access information of other users other than the target user, a file to be described in the prefetch list is selected, and a prefetch list in which the selected file name is described is generated. To
The communication system according to claim 1 or 2. The prefetch list generation unit
In response to a request for the look-ahead list from a target user,
Among other users other than the target user, one or more other users whose access tendency obtained from the user access information is similar to the target user's access tendency according to a predetermined standard are identified, and the similar 1 Selecting a file to be described in the prefetch list on the basis of the transmission request frequency for each file for more than one user, and generating a prefetch list in which the selected file name is described.
The communication system according to claim 1 or 2. The prefetch list generation unit
In response to a request for the look-ahead list from a target user,
Based on the transmission request frequency for each file obtained from the previous user access information of the target user, select a file to be described in the prefetch list, and generate a prefetch list describing the selected file name.
The communication system according to claim 1 or 2. A server that stores and manages multiple files used when executing web applications,
A receiving unit that receives a file transmission request from a communication terminal;
A transmission unit for transmitting the requested file to the requesting communication terminal;
An access information generating / storing unit that generates and stores user access information for each requested file name based on transmission requests from a plurality of received communication terminals;
Based on the stored user access information, a prefetch list generation unit that generates a prefetch list for each web application;
A storage unit for storing a prefetch list for each generated web application;
When a prefetch list for a certain web application is requested from the communication terminal, the prefetch list for the web application is read from the storage unit and transmitted to the communication terminal;
A server comprising A server that stores and manages multiple files used when executing web applications,
A receiving unit for receiving a file transmission request and a user ID from a communication terminal;
A transmission unit for transmitting the requested file to the requesting communication terminal;
Based on the received transmission requests from a plurality of communication terminals, an access information generation and storage unit that generates and stores user access information for each web application in association with user IDs and file names requested to be transmitted;
Based on the stored user access information, a prefetch list generation unit that generates a prefetch list for each web application;
A storage unit for storing a prefetch list for each generated web application;
When a prefetch list for a certain web application is requested from the communication terminal, the prefetch list for the web application is read from the storage unit and transmitted to the communication terminal;
A server comprising The prefetch list generation unit
In response to a request for the look-ahead list from a target user,
Based on the transmission request frequency for each file obtained from user access information of other users other than the target user, a file to be described in the prefetch list is selected, and a prefetch list in which the selected file name is described is generated. To
The server according to claim 6 or 7, wherein The prefetch list generation unit
In response to a request for the look-ahead list from a target user,
Among other users other than the target user, one or more other users whose access tendency obtained from the user access information is similar to the target user's access tendency according to a predetermined standard are identified, and the similar 1 Selecting a file to be described in the prefetch list on the basis of the transmission request frequency for each file for more than one user, and generating a prefetch list in which the selected file name is described.
The server according to claim 6 or 7, wherein The prefetch list generation unit
In response to a request for the look-ahead list from a target user,
Based on the transmission request frequency for each file obtained from the previous user access information of the target user, select a file to be described in the prefetch list, and generate a prefetch list describing the selected file name.
The server according to claim 6 or 7, wherein A communication control method executed by a server that stores and manages a plurality of files used when executing a web application,
A receiving step of receiving a file transmission request from the communication terminal;
A transmission step of transmitting the file requested to be transmitted to a requesting communication terminal;
Based on the received transmission requests from a plurality of communication terminals, an access information generation and storage step for generating and storing user access information for the file name requested for transmission for each web application;
A prefetch list generating step for generating a prefetch list for each web application based on the stored user access information;
A save step for storing a prefetch list for each generated web application;
When a prefetch list for a certain web application is requested from the communication terminal, a prefetch list transmission step for reading the prefetch list for the web application saved in the saving step and transmitting the prefetch list to the communication terminal;
A communication control method comprising: A communication control method executed by a server that stores and manages a plurality of files used when executing a web application,
A reception step of receiving a file transmission request and a user ID from the communication terminal;
A transmission step of transmitting the file requested to be transmitted to a requesting communication terminal;
Based on the received transmission requests from a plurality of communication terminals, an access information generation and storage step for generating and storing user access information in which the user ID and the requested file name are associated with each web application;
A prefetch list generating step for generating a prefetch list for each web application based on the stored user access information;
A save step for storing a prefetch list for each generated web application;
When a prefetch list for a certain web application is requested from the communication terminal, a prefetch list transmission step for reading the prefetch list for the web application saved in the saving step and transmitting the prefetch list to the communication terminal;
A communication control method comprising:

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