JP5698011B2 - Data sharing apparatus, program and method - Google Patents

Description

  The present invention relates to a data sharing apparatus, a program, and a method.

  The e-mail system has become widespread in every scene such as work place, school, home, etc., and is becoming a central means of communication. The form of use is no longer limited to the form of accessing a mail account from a specific terminal, but has evolved to a form of accessing the same account from terminals placed in a plurality of places. With such a form, the convenience of being able to access the same electronic mail wherever the user is located is enhanced. Another advantage is that multiple users use the same account and use a common file.

  In Patent Document 1, a proxy server that performs content matching between a mail list held by each terminal and a mail list of the mail server is installed between a plurality of terminals that are mail clients and the mail server 101. Discloses a method for sharing mail data.

  Patent Document 2 discloses a method of providing a mechanism for matching contents between a plurality of terminals and a mail server, and matching each mail data.

JP-A-2002-244979 JP2007-102301A

  The problem to be solved by the present invention is to share mail data even in a system using a mail server that provides only the POP3 protocol, as in a system using the IMAP4 protocol. Neither the method of patent document 1 nor the method of patent document 2 mentions a means for avoiding a situation in which a plurality of terminals simultaneously access the mail server. Therefore, in a system using these methods, a situation occurs in which operations from a plurality of mail clients occur at the same time. Therefore, when mail data is shared, a failure occurs.

  An object of the present invention is to solve the above problems and share mail data even in a system using a mail server that provides only the POP3 protocol, as in a system using the IMAP4 protocol.

  According to the present invention, the shared data storage means for storing the file, the file acquired by the POP protocol from the mail device is stored in the shared data storage means, and the request data received from each of a plurality of terminals is acquired. A data sharing apparatus having synchronization control means for transmitting the file stored in the shared data storage means to the transmission source terminal of the request data is obtained.

According to the present invention, a shared data storage process for storing a file in a shared data storage unit;
When the file acquired from the mail device by the POP protocol is stored in the shared data storage unit and the request data received from each of a plurality of terminals is acquired, the file stored in the shared data storage unit is transmitted from the request data transmission source. A data sharing program for causing the computer to execute the synchronization control processing to be transmitted to the terminal is obtained.

According to the present invention, the file is stored in the shared data storage unit,
When the file acquired from the mail device by the POP protocol is stored in the shared data storage unit and the request data received from each of a plurality of terminals is acquired, the file stored in the shared data storage unit is transmitted from the request data transmission source. A data sharing method can be obtained that is sent to the terminal.

  According to the present invention, even in a system using a mail server that provides only the POP3 protocol, mail data can be shared as in a system using the IMAP4 protocol.

FIG. 1 is a diagram showing the configuration of the first exemplary embodiment of the present invention. FIG. 2 is a diagram illustrating the operation of the synchronization control unit according to the first embodiment of this invention. FIG. 3 is a diagram illustrating an example of the synchronization management table according to the first embodiment of this invention. FIG. 4 is a diagram illustrating an example of a reference time management table according to the first embodiment of this invention. FIG. 5 is a diagram illustrating an example of a list table according to the first embodiment of this invention. FIG. 6 is a diagram illustrating a relationship between a folder and a file in the list table according to the first embodiment of this invention. FIG. 7 is a flowchart showing the processing of the first exemplary embodiment of the present invention. FIG. 8 is a flowchart showing the process of the second embodiment of the present invention. FIG. 9 is a flowchart showing the process of the third embodiment of the present invention. FIG. 10 is a diagram showing the configuration of the fourth exemplary embodiment of the present invention.

(First embodiment)
FIG. 1 shows the configuration of the first embodiment of the present invention. In FIG. 1, the mail sharing apparatus includes a synchronization control unit 102, a communication control unit 103, a file control unit 104, a shared data storage unit 105, and a synchronization data storage unit 106.

  The mail server 101 and the mail client 107 exchange mail data via the communication control unit 103 and the file control unit 104, respectively.

  Here, the mail data is data constituting the contents of the mail. For example, text data and image data constituting the mail body are included in the mail data. In addition, what saved the mail data in the format of the data which each has is called a mail file.

  The mail server 101 transmits the mail file designated by the mail client 107 to the address designated by the mail client 107. Further, the storage status of the mail sent and received by the mail server 101 is displayed on the display unit of the mail client 107 by a mail display unit (not shown).

  The mail client 107 is a user terminal that is directly operated by a user who requests transmission / reception of mail and reference of a file including a mail file. The mail client 107 issues a mail transmission / reception request to the mail server 101 via the communication control unit 103, specifying its own address, destination or source address, mail file name, and mail file storage location. .

  The mail client 107 can load the list table of the shared data storage unit 105 into a memory (not shown) and display it on the screen. The mail client 107 can designate a mail file designated by referring to the list table as a mail file to be transmitted.

  In addition, the mail client 107 can take a list of sent and received mails (not shown) of the mail server 101 into a memory (not shown) and display it on the screen. The mail client 107 can designate a mail file designated by referring to a list of sent and received mails as a mail file to be received. Here, the transmission / reception list displays the mail file name and destination address transmitted by the mail server 101, and the received mail file name and source address.

  Further, the mail client 107 can instruct the communication control unit 103 to store in the shared data storage unit 105 a mail file newly created by the user and a mail file updated after editing. In addition, the mail client 107 can instruct the communication control unit 103 to delete the mail file designated by the user from the shared data storage unit 105. When the communication control unit 103 receives an instruction to store or delete instructions from the mail client 107, the synchronization control unit 102 executes these instructions via the file control unit 104 by synchronization control.

  Each mail client 107 asynchronously requests the communication control unit 103 for updates including POP3 / SMTP, including mail transmission / reception, mail file reference, deletion, and new storage. POP3 is Post Office Protocol Version 3, and SMTP is Simple Mail Transfer Protocol.

  The shared data storage unit 105 centrally stores received mail, outgoing mail, address book data, and other files of mail accounts shared by a plurality of mail clients 107. The shared data storage unit 105 stores received mails and transmitted mails in predetermined folders (also referred to as storage areas or storage locations), and stores various mails in arbitrarily created folders. Further, the shared data storage unit 105 has a list table indicating these mails and their storage areas. FIG. 5 shows an example of the list table. The list table shows the folders in the shared data storage unit 105, the files stored in the folders, and the number thereof. FIG. 6 is a diagram illustrating the contents of the list table together with the structure of the shared data storage unit 105. The shared data storage unit 105 has a hierarchical structure, and has a structure capable of having a folder in each hierarchy.

  The synchronous data storage unit 106 stores connection information to the mail server 101, processing request contents from each mail client 107, and terminal information of each mail client 107 including an IP address (IP: Internet Protocol). Among these, the processing request contents are stored in a synchronization management table and a reference time management table described later. The synchronization data storage unit 106 stores synchronization control information including a synchronization time and a synchronization time interval.

  The synchronization control unit 102 has a built-in clock, measures the time, and executes an operation including a mail transmission / reception process for each request transmitted in a certain period (also referred to as a synchronization period). And the operation of the file control unit 104 is controlled. Based on the synchronization control information stored in the synchronization data storage unit 106, the synchronization control unit 102 executes a process of processing the request data and a synchronization period in which the request data acquired by the communication control unit 103 is recorded in the synchronization management table. Repeat with the period. A request received from the mail client 107 by the communication control unit 103 is notified from the communication control unit 103 to the synchronization control unit 102.

  The execution period is a period for instructing the communication control unit 103 and the file control unit 104 to process the request from the mail client 107 received during the synchronization period in the order in which the requests are received after the synchronization period ends.

  The synchronization control unit 102 can acquire a file including a mail file from the shared data storage unit 105 via the file control unit 104. Further, the synchronization control unit 102 has a memory cache, and can temporarily store a file including the acquired mail file in the memory cache.

  The synchronization control unit 102 can record a request received during the synchronization period in a synchronization management table, which will be described later, and refer to it.

  The synchronization control unit 102 records the name of the referenced mail client 107 and the referenced time in the reference time management table, and can refer to this. Here, the mail file subjected to the transmission request and reception request via the communication control unit 103 is regarded as being referred to and recorded in the reference time management table.

  The synchronization control unit 102 can compare the last update time, which is the time when the data related to the requested mail is last updated, with the last reference time.

  When the last update time of the request target mail data is after the last reference time, the synchronization control unit 102 can interrupt the process of instructing the request received by the communication control unit 103 to the file control unit 104.

  The synchronization control unit 102 can notify the requesting mail client 107 via the communication control unit 103 of the request rejection or the reason. The mail client 107 that has received the request rejection refers to the latest information (display update) and makes a request again as necessary.

  The communication control unit 103 transmits a processing request including mail transmission / reception from the mail client 107 to the mail server 101 under the instruction of the synchronization control unit 102.

  In response to an instruction from the synchronization control unit 102, the communication control unit 103 sends a mail file designated by the mail client 107 in response to the mail transmission request via the synchronization control unit 102 and the file control unit 104. Obtained from the storage unit 105.

  The communication control unit 103 instructs the mail server 101 to transmit the mail file to the transmission destination address designated by the mail client 107 under the instruction of the synchronization control unit 102.

  In response to an instruction from the synchronization control unit 102, the communication control unit 103 receives a mail file specified from the mail client 107 in response to a mail reception request from a transmission source address specified from the mail client 107. The mail server 101 is instructed.

  In addition, the communication control unit 103 stores the acquired mail file in the shared data storage unit 105 via the file control unit 104.

  The file control unit 104 acquires a mail file from the shared data storage unit 105 based on an instruction from the synchronization control unit 102 and provides the mail file to the communication control unit 103 via the synchronization control unit 102.

  Further, the file control unit 104 stores the mail file in the shared data storage unit 105 under the instruction of the synchronization control unit 102.

  Further, the file control unit 104 provides the mail file acquired from the shared data storage unit 105 to the mail client 107 of the instructed IP address based on an instruction to the synchronization control unit 102.

  Further, the file control unit 104 stores the mail file in the shared data storage unit 105 and the stored mail file in response to a request from each mail client 107 under the instruction of the synchronization control unit 102. Perform the deletion. When receiving an instruction to delete any mail file or store a new mail file, the file control unit 104 deletes or stores the mail file and updates a list table to be described later.

  Further, in response to a file access request from each mail client 107, the file control unit 104 provides the data in the shared data storage unit 105 to each client 107 based on an instruction from the synchronization control unit 102. This data is provided to each mail client 107 through the same interface as the local data used by each mail client 107.

  The synchronous data control unit 102, the communication control unit 103, and the file control unit 104 may be configured by hardware using a logic circuit, or may be configured by a computer program executed by software application software. .

  FIG. 2 is a diagram for explaining the function of the synchronization control unit 102. The synchronization control unit 102 includes a synchronization management table (FIG. 3) that records the operations of the communication control unit 103 and the file control unit 104 in the synchronization control data storage unit 106, and a reference time management table that records the last reference time of each mail client 107. Control based on (FIG. 4). This control is privilege control in which a priority is set for a request and processing is executed from a request with a high priority. The method of performing processing in order from the request data at the top of the synchronization management table is an example of a privilege control method. Usually, since the request data is stored in the synchronization management table from the top (in the direction of the arrow in FIG. 3) in the order of receiving the request data, the priority of this privilege control is determined by the reception time. The IP addresses of the respective mail clients 107 are IP address 1, IP address 2, IP address 3, IP address 4, and IP address 5.

  The synchronization management table shown in FIG. 3 stores request content data indicating the distinction between mail transmission, reception, reference, and update for each request source indicating the IP address of the mail client 107 that issued the request. Here, the update includes reorganization, new creation, and deletion. In addition, the synchronization management table stores, for each request source, the destination address indicating the transmission destination address, and the request target data indicating the name of the mail file stored in the shared data storage unit 105 that is the target of the request. ing.

  In addition, the synchronization management table stores data on the target file storage location indicating the storage location of the mail file, the reception time of the request data, and the privilege indicating the presence or absence of the privilege for each request source. The target file storage location indicates a storage location of a request target in a list table described later.

  When the request content is mail transmission, a set of data composed of a destination address (also called a transmission destination address), a request target, and a target file storage location is called request data. When the request content is mail reception, the target file storage location is called request data. When the request content requests reference or editing, a set of data composed of a request target and a target file storage location is called request data.

  Privilege is a symbol for performing privilege control. The privilege is given to the earliest request received by the synchronization control unit 102 for each request content. For a request source having the privilege to receive processing first, this is indicated by a symbol, and in the case of FIG. 3, this symbol is a black circle. The synchronization control unit 102 starts processing from a privileged request.

  The reference time management table in FIG. 4 is created for each file to be processed in the shared data storage unit 105, and stores the request source, the last reference time, and the process at the last reference time for each request source. The last reference time is updated to the time when the file is closed each time the file is referenced. The process at the time of the last reference time indicates a distinction between a process in which a file is simply referred to (reference) and a case where an update is performed by editing at the time of reference (update). Here, the process of “reference” includes not only simple browsing but also a transmission operation performed without editing. The process of “update” includes, in addition to editing, a new storage operation at the time of reception and a storage operation for a newly created file.

  FIG. 7 is a flowchart showing mail sharing processing. In the example of FIG. 7, for the sake of simplicity, the request contents of the mail client 107 are limited to transmission / reception of mail. The synchronization control unit 102 starts the synchronization period. 0 is input to the synchronization period elapsed time T (S1). When request data is input from the mail client 107 to the communication control unit 103 (S2), the synchronization control unit 102 stores this request data in the synchronization management table of the synchronization data storage unit 106 (S3). The synchronization control unit 102 determines whether or not the time has reached the synchronization time Ts (S4). While the synchronization period has not been reached (S4: NO), the synchronization control unit 102 causes the communication control unit 103 to accept the next request data and repeatedly stores the received request data in the synchronization management table. When the synchronization time Ts is reached (S4: YES), the synchronization control unit 102 reads the request data in the stored order from the synchronization management table (S5). The uppermost row of the synchronization management table is the earliest stored request data, and the mail client 107, which is the request data source, has the privilege to receive the earliest processing. It is determined whether or not the request content of the read request data is mail transmission (S6).

  If the request content is email transmission (S6 YES), the synchronization control unit 102 acquires the requested mail file from the shared data storage unit 105 via the file control unit 104, and stores it in the memory cache. (S7). Next, the synchronization control unit 102 outputs the mail file to the communication control unit 103, and instructs the mail server 101 to send the mail file to the transmission destination indicated by the request data (S8). After the communication control unit 103 issues a mail transmission instruction, the synchronization control unit 102 deletes the request data from the synchronization management table (S9). In addition, the synchronization control unit 102 inputs a request source, a time when the mail file is transmitted to the mail server 101 as the last reference time, and a reference as processing at the last reference time, respectively. The synchronization control unit 102 determines whether or not there is data in the synchronization management table (S14). If there is (S13: YES), the synchronization control table 102 returns to S5 and reads the synchronization management table. If not (S14: NO), the synchronization control unit 102 starts the next synchronization period (S1).

  When the request content is not mail transmission (NO in S6), the synchronization control unit 102 instructs the communication control unit 103 to acquire the received mail from the mail server 101 using the POP3 protocol (S10). Subsequently, the synchronization control unit 102 acquires the mail file of the received mail from the communication control unit 103 and writes it in the shared data storage unit 105 via the file control unit 104 (S11). The file control unit 104 records the file name in the folder name field written in the list table, and adds one to the number of files. The synchronization control unit 102 causes the communication control unit 103 to transmit this mail file to the requesting mail client 107 (S12). After issuing a mail file transmission instruction to the communication control unit 103, the synchronization control unit 102 deletes the request data from the synchronization management table (S13). In addition, the synchronization control unit 102 inputs the request source, the time when the mail file is transmitted to the mail client 107 as the last reference time, and the reference as the process at the last reference time, respectively. The synchronization control unit 102 determines whether there is data in the synchronization management table (S14). If there is data (S14: YES), the synchronization control table 102 returns to S5 and reads the synchronization management table. If not (S14: NO), the synchronization control unit 102 starts the next synchronization period (S1).

  In this flowchart, it has been described that the synchronization control unit 102 processes the request data in the order stored in the synchronization management table. Here, it is assumed that request data is arranged in the synchronization management table from the top in the stored order. However, even when request data is not arranged in the synchronization management table in order from the top, the synchronization control unit 102 can process the request. For example, the joint / synchronization control unit 102 can start processing from request data having a privilege mark shown in FIG. The joint / synchronization control unit 102 records the reception time of the request data in the synchronization management table, and when there are a plurality of request contents, the process starts from the request data received earliest among the privileged request data. To do.

In addition, the privilege may be set not only by the reception time, but also by the request source.
In this case, when the processing of privileged request data is completed, the request data can be changed in the order received. Alternatively, the next request data may be determined at random when the processing of privileged request data is completed.

  In this flowchart, the request contents are limited to mail transmission and mail reception, but mail data can be shared in the same manner when there are other mail file references and updates as the request contents. When the request content is reference or update, the request data of the mail client 107 may be received by the file control unit 104.

  The file control unit 104 can be placed on the same local network as the mail client 107 in order to quickly access the file from the mail client 107. However, the file control unit 104 may be divided into a network on the mail client 107 side and a network on the mail sharing apparatus side. With this configuration, a remote mail client 107 can access the same file control unit 104. In this case, data is transmitted and received between the file control units 104 arranged separately by communication using an arbitrary protocol, for example, HTTP. With this method, there is no restriction on the arrangement of the mail sharing device, and mail data can be synchronized and shared between mail clients in a wide area.

  The file control unit 104 is not necessarily provided separately from the communication control unit 103. The communication control unit 103 may have the function of the file control unit 104.

  In the present embodiment, the case where the request target is a mail file has been described, but the request target is not limited to a mail file. The request target may be a file other than a mail file. For example, as for a document file and a presentation file including files saved in Word, Ichitaro, text, and PowerPoint formats, a graphic file is a request target.

  In this embodiment, a synchronization control method is employed in which the synchronization control unit 102 processes requests acquired at a certain time in the order stored in the synchronization data storage unit 106. However, the synchronization control method is not the only method for realizing this embodiment. After the synchronization control unit 102 processes one request acquired from the communication control unit 103, a method may be used in which the next request is processed without a particular time.

  Further, the synchronization control unit 102 may be implemented including the functions of the communication control unit 103 and the file control unit 104.

According to this embodiment, the IMAP4 protocol is used even in a system using a mail server that provides only the POP3 protocol by processing the requests of the mail client 107 in the order stored in the synchronous data storage unit by the synchronization control. You can share email data as you would on your system.
(Second Embodiment)
In the second embodiment, processing for confirming whether or not a mail file has been updated using a reference time management table is added to the first embodiment. FIG. 8 is a flowchart showing the processing of the second embodiment. The only difference from the first embodiment is that S6A and S6B are added, and the others are the same as in the first embodiment. When it is determined in S6 that the request content is transmission, the synchronization control unit 102 refers to the reference time management table. The synchronization control unit 102 determines whether the update date / time of the mail file to be requested (the last reference date / time of the line whose final reference time processing is “update”) is before or after the last reference date / time of the request source. (S6A). When the update date / time of the request target mail file is before the last reference date / time of the request source, the synchronization control unit 102 performs the process of S7 as in the first embodiment. If the update date / time of the request target mail file is later than the last reference date / time of the request source, the synchronization control unit 102 notifies the request source mail client 107 that the mail file has been updated (S6B). The determination of S14 is performed without performing the processes after S7.

  The following is an explanation of an example in which transmission is executed as the request content with the IP address 1 (mail client-1) being the request source and the request target being the mail 1. In S6A, the synchronization control unit 102 refers to the reference time management table, the last reference date and time of the IP address 1 is “January 13th 05:00”, and the reference date and time “1” accompanying the update by the IP address 2 It is determined that it is before “05:00 on March 14”. The synchronization control unit 102 notifies the mail client-1 that the file of the mail 1 has been updated by displaying a comment or symbol indicating this on the screen of the mail client-1. Upon receiving this notification, the mail client-1 refers to the mail 1, changes it if necessary, updates it, and then sends a transmission request again.

In the second embodiment, since the process of referring to the reference time management table is added, in addition to the effect of the first embodiment, there is an effect that the latest information can be selected.
(Third embodiment)
If the same request data except for the request source is input to the communication control unit 103 from a plurality of request sources in the same synchronization period, the mail data is more efficiently processed by collectively processing the same request data. Can be handled. The processing in this case is shown in the flowchart of FIG. In the example of FIG. 9, the request contents of the mail client 107 are limited to mail transmission / reception in order to simplify the description.

  The flowchart of the third embodiment is the same as the flowchart of the first embodiment, except that the processes of S4A, S4B, S6C, and S7A are added to the flowchart of the first embodiment. The following description will be given with respect to the additional portions and the related portions.

  Before the synchronization control unit 102 reads the synchronization management table, the synchronization management table is sorted, and the request data, the request target, and the request destination address are all equal to each other while maintaining the order in the vertical direction. Arrange (S4A). The synchronization control unit 102 sets memories A, B, and C for temporarily storing destination addresses, which are destination addresses of the synchronization management table, and request targets, respectively. The synchronization control unit 102 stores and initializes invalid values in each of these memories (S4B). Next, the synchronization management table is read (S5).

  After the synchronization control unit 102 determines that the request content is transmission (S6), “the destination address of the request data is equal to the data stored in the memory A, and the request target is stored in the memory B. It is determined whether or not it is equal to existing data (S6C). When it is determined in S6C that they are equal, the synchronization control unit 102 outputs the mail file stored in the memory cache in the mail server 101 to the communication control unit 103. Next, the synchronization control unit 102 instructs the communication control unit 103 to transmit this mail file to the mail server 101 (S8). If it is determined in S6C that they are different, the synchronization control unit 102 acquires the mail file and stores it in the memory cache (S7). Thereafter, the destination address of the synchronization management table read in S5 is stored in the memory A, and the mail file name is stored in the memory B (S7A). Next, the mail file stored in the memory cache is output to the communication control unit 103. Next, the synchronization control unit 102 instructs the communication control unit 103 to transmit this mail file to the mail server 101 (S8). The subsequent processing is the same as in the first embodiment.

  When the synchronization control unit 102 determines that the request content is not transmitted (S6: NO), the processing of S10 to S12 is performed as in the first embodiment.

  Sorting is not always necessary.

In the third embodiment, since the synchronization management table is sorted and the same request data is continuously processed, the number of mail file acquisition and writing is reduced. In addition to the effects of the first embodiment, It is possible to obtain the effect of improving the efficiency of the processing of request data as a whole.
(Fourth embodiment)
FIG. 10 is a configuration diagram illustrating the fourth embodiment. In the fourth embodiment, a shared data storage unit 105 that stores files and a file acquired from the mail server 101 by the POP protocol are stored in the shared data storage unit 105, and request data received from each of a plurality of terminals is acquired. Then, the data sharing apparatus 100 includes the synchronization control unit 102 that transmits the file stored in the shared data storage unit 105 to the transmission source terminal of the request data.

  According to this embodiment, mail data is shared in a system using a mail server that provides only the POP3 protocol by processing requests from user terminals one by one, as in a system using the IMAP4 protocol. be able to.

DESCRIPTION OF SYMBOLS 100 Data sharing apparatus 101 Mail server 102 Synchronization control part 103 Communication control part 104 File control part 105 Shared data storage part 106 Synchronization data storage part 107 Mail client

Claims (6)

A shared data storage means for storing a file newly created by a user, a file updated after editing, and a file acquired from a mail device by a POP protocol in a shared data storage unit including a plurality of storage locations;
Communication control means for receiving data requesting transmission of the file, which specifies the name of the file, the storage location of the file, and the transmission destination address of the file, from each of a plurality of terminals;
The requested data is acquired one by one from the communication control means, and the file having the file name specified by the requested data is acquired from the storage location specified by the requested data, and the communication is performed. If it is determined that the file is not updated based on a reference time management table that is output to the control unit and records whether the file is updated or not, the requested data is designated to the communication control unit. wherein said file instructs a process of transmitting the destination address of, if it is determined that there is an update to the file, to the requesting data for the request, and synchronization control means for notifying the update of the file A data sharing apparatus comprising:   The synchronization control means counts a certain period, stores the requested data acquired in the certain period in the synchronization data storage unit, and stores the requested data from the synchronization data storage unit when the certain period has elapsed. The file having the name of the file specified by the requested data is acquired from the specified storage location, stored in the memory cache, acquired from the memory cache, and output to the communication control means. When a plurality of requested data (identical request data) specifying the same file name and the same storage location are stored in the synchronous data storage unit, the same request data is collectively and continuously Read the first read file having the file name specified by the same request data (same file) from the specified storage location, and store the memory Instructing the communication control means to transmit the same file to the destination address designated by the same request data, and outputting the file from the memory cache to the communication control means. The same file specified by the same request data read after the th is acquired from the memory cache, and the same file acquired from the memory cache is read by the communication control means after the second The data sharing apparatus according to claim 1, wherein an instruction to transmit to the transmission destination address designated by the same request data is issued. A shared data storage process for storing a file newly created by a user, a file updated after editing, and a file acquired from a mail device by a POP protocol in a shared data storage unit including a plurality of storage locations;
A communication control process in which a communication control unit receives data requesting transmission of the file, specifying a name of the file, a storage location of the file, and a transmission destination address of the file;
The requested data is acquired one by one from the communication control unit, and the file having the name of the file specified by the requested data is acquired from the storage location specified by the requested data, and the communication is performed. When it is determined that the file is not updated based on a reference time management table that is output to the control unit and records whether the file is updated or not, the requested data is designated to the communication control unit. wherein said file instructs a process of transmitting the destination address of, if it is determined that there is an update to the file, to the requesting data for the request, and the synchronization control processing for notifying update of the file A data sharing program for causing a computer to execute. In the synchronization control process, the computer measures a certain period, stores the requested data acquired in the certain period in a synchronization data storage unit, and when the certain period has elapsed, the synchronization data Acquire one by one from the storage unit, acquire a file having the name of the file specified by the requested data from the specified storage location, store it in the memory cache, and acquire from the memory cache in the communication control process A plurality of pieces of requested data (identical requested data) designating the same file name and the same storage location are sent to the synchronous data. When stored in the storage unit, the same request data is read continuously in a batch, and read first. A file having the same file name specified by the same request data (same file) is acquired from the specified storage location and stored in the memory cache, and the same file acquired from the memory cache is stored in the memory cache in the communication control process. Sending an instruction to send to the destination address specified by the request data, obtaining the same file specified by the same request data read after the second from the memory cache,
4. The data sharing according to claim 3, wherein, in the communication control process, an instruction to send the same file acquired from the memory cache to the destination address specified by the same request data read after the second is issued. 5. program. A file newly created by the user, a file updated after editing, and a file acquired from the mail device by the POP protocol are stored in a shared data storage unit including a plurality of storage locations,
The communication control unit receives data requesting transmission of the file, specifying the name of the file, the storage location of the file, and the transmission destination address of the file,
The requested data is acquired one by one from the communication control unit, and the file having the name of the file specified by the requested data is acquired from the storage location specified by the requested data, and the communication is performed. When it is determined that the file is not updated based on a reference time management table that is output to the control unit and records whether the file is updated or not, the requested data is designated to the communication control unit. wherein the destination address indicates the processing for transmitting the file, if it is determined that there is an update to the file, to the requesting data for the request, the data sharing method for notifying the update of the file to be .   Timing a certain period, storing the requested data acquired in the certain period in the synchronization data storage unit, and when the certain period has elapsed, obtaining one by one from the synchronization data storage unit, The file having the name of the file specified by the requested data is acquired from the specified storage location and stored in the memory cache, and the file acquired from the memory cache is stored in the destination address specified by the requested data. When a plurality of requested data (same request data) specifying the same file name and the same storage location are stored in the synchronous data storage unit, the same request data is Read the data in batches and specify the file (same file) with the file name specified by the same request data that was read first. An instruction to transmit the same file acquired from the memory cache to the destination address designated by the same request data, and read from the second and subsequent times. The same file specified by the same request data is acquired from the memory cache, and the same file acquired from the memory cache is read to the destination address specified by the same request data read after the second time. 6. The data sharing method according to claim 5, wherein an instruction for transmission is issued.

Images