JP2010009091A - Data management device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mechanism, capable of acquiring necessary search restriction information by one processing even in a data search extending over a plurality of storage devices. <P>SOLUTION: A search restriction storage part 45 stores two or more pieces of search restriction information covering different object storage devices 53-56 while assigning a common restriction definition name thereto. Upon receipt of a data search request, an archive search part 31 determines, based on the attribute of a user that is the data search request source, a restriction definition name to be applied to the user, and an access management part 40 collectively acquires two or more pieces of search restriction information to which the determined restriction definition name is assigned from the search restriction storage part. An archive management part 51 searches data from the storage devices 53-56 according to search restrictions shown in the acquired two or more pieces of search restriction information. Since the two or more pieces of search restriction information to which the common restriction definition name is assigned are collectively acquired, acquisition of search restriction information can be performed by one communication processing, and the speed of data search can be enhanced. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to, for example, an access management technique for stored data, and more particularly to an access management technique for stored electronic mail.

In recent years, with the spread of the Internet, it has become common to use e-mails in business activities, and e-mail systems are used as enterprise backbone systems.
Electronic mail is widely used for distribution of business information because it can immediately distribute information between physically separated locations and can distribute information to a plurality of people at once.
E-mail can refer to e-mails that have been sent and received in the past, and e-mail archiving systems that store and store e-mails that have been sent and received in connection with internal control are spreading.
At this time, as a technique for restricting data that can be accessed for each user who executes search / acquisition processing for e-mail archive data in which e-mail data transmitted / received between a plurality of client terminals is centrally stored There is one.
JP 2005-293196 A

In Patent Document 1, an access authority is individually given to each user who accesses data.
The access authority is determined for each user by creating a record describing access restrictions using the user ID (Identification) as a key in the access permission table and the access prohibition table.
In Patent Document 1, a data search request from a user is accepted, and in response to this data search request, the data within a range that matches the search condition and is permitted to be accessed by the user specified by the access permission table. In addition, only data that is not in a range where the user is prohibited from accessing according to the specification of the access prohibition table is returned to the user as a search result.
However, the e-mail archiving system uses e-mail data as a header information accumulator, text information accumulator, mail body accumulator in order to reduce storage capacity, facilitate header information management, and streamline header information search. The index information storage unit manages them separately.
In the case of Patent Document 1, the access restriction indicates the user ID and the access restriction condition. The access restriction condition for the information storage unit is defined, and the access restriction condition is acquired when a data search request is received from the user. Therefore, there is a problem that a plurality of communication processes occur.
That is, the access restriction condition is defined for each of the header information storage unit, text information storage unit, mail body storage unit, and index information storage unit, and when searching for data across a plurality of storage units, the storage unit Each access restriction condition needs to be acquired, and a plurality of communication processes occur in order to acquire the access restriction conditions for a plurality of storage units.

  One of the main objects of the present invention is to solve the above-described problems, and a mechanism for acquiring necessary search restriction information in a single process even in the case of data search across a plurality of storage devices is realized. The main purpose is to do.

The data management apparatus according to the present invention is
A plurality of data storage units for storing data to be searched;
A search restriction storage unit that stores a plurality of search restriction information in which a restriction in data search is indicated in units of data storage units;
When there is a data search request, select any search restriction information, a search restriction acquisition unit that acquires the selected search restriction information from the search restriction storage unit,
A data search unit that searches for data according to the data search restriction indicated in the search restriction information from the data storage unit targeted by the search restriction information acquired by the search restriction acquisition unit;
The search restriction storage unit
Two or more specific search restriction information among a plurality of search restriction information is stored in association with each other as joint search restriction information,
The search restriction acquisition unit
When the joint search restriction information is selected when there is a data search request, each of the joint structure search restriction information constituting the joint search restriction information is collectively acquired from the search restriction storage unit,
The data search unit
A data search is performed according to the data search restriction indicated in each joint configuration search restriction information from the data storage unit targeted by each joint configuration search restriction information collectively acquired by the search restriction acquisition unit. .

  According to the present invention, two or more pieces of search restriction information are associated with each other, and when there is a data search request, two or more pieces of associated search restriction information are obtained in a lump. The communication process for this is only required once, and the data search speed can be increased.

Embodiment 1 FIG.
In this embodiment, the access restriction condition is managed by dividing it into a restriction definition and a search restriction, and when the access restriction condition is acquired, the restriction definition including a plurality of search restrictions is used as a keyword to obtain the access restriction condition. Solve the above problems.

  Hereinafter, the present embodiment will be described with reference to the accompanying drawings.

First, the overall configuration of the system according to the present embodiment will be described with reference to FIG.
FIG. 1 is a functional block diagram of the entire system according to the present embodiment.
The system according to the present embodiment includes an email archive client 10 and an email archive server 30 which are a plurality of information processing devices connected to a network. The email archive server 30 is an example of a data management device.

The e-mail archive client 10 transmits an e-mail search command to the e-mail archive server 30 in response to a request from the e-mail management application 20 that accepts a request from an end user, and provides the search result to the user. .
Further, the email archive client 10 issues a command to register, edit, and delete user information of a user who uses the email archive server 30 via the email archive client 10 in response to a request from the email management application 20. The result is transmitted to the email archive server 30 and the result is provided to the user.
The email archive client 10 is, for example, one or more information processing apparatuses in which an execution environment of an application created in Java (registered trademark) or C language is installed.
The e-mail management application 20 transmits a search command to one or a plurality of e-mail archive servers 30 and acquires the search results.
The e-mail archive server 30 stores e-mail as e-mail archive data (hereinafter also referred to as e-mail data), receives a search command from an e-mail client, and searches and acquires the accumulated e-mail archive data Is returned to the e-mail archive client 10.
The e-mail archive client 10 and the e-mail archive server 30 each have a hardware configuration (CPU, memory, a hard disk on which a program is installed), which is necessary for executing a program for realizing each function. LAN (communication interface such as Local Area Network).

Next, the functional configuration of the e-mail archive client 10 will be described.
The e-mail archive client 10 includes an e-mail management application 20 in which an end user performs e-mail management processing, and a management client library 24 for the e-mail management application 20 to operate the e-mail archive server 30.

The e-mail management application 20 includes a search unit 21 and a user management unit 22.
The search unit 21 acquires e-mail search conditions from the end user, and performs e-mail data search processing on the e-mail archive server 30 via the management client library 24.
The user management unit 22 receives an end user registration, editing, deletion, and acquisition command for executing an e-mail search from the end user, and sends the user information of the user to the e-mail archive server 30 via the management client library 24. To operate.
The management client library 24 holds programs for realizing notification of email search processing and user management processing processed by the email archive server 30.

Next, the functional configuration of the e-mail archive server 30 will be described.
The email archive server 30 includes an archive search unit 31, an access management unit 40, a user information storage unit 41, an archive management unit 51, and a storage area unit 52.

The archive search unit 31 performs the main processing of the present embodiment (e-mail archive data search processing and user management processing).
The archive search unit 31 executes the communication unit 311 that receives a processing command (data search request) from the e-mail archive client 10 via the network, and the search processing information received by the communication unit 311 and the access management unit 40 to acquire the processing command. The search condition formula (search condition description) of the email archive data is generated based on the information held in the user information storage unit 41 to be notified, the generated search condition formula is notified to the archive management unit 51, and the result is received. An e-mail search processing unit 312 and a user management processing unit 313 that operates information in the user information storage unit 41 using the access management unit 40 based on the user management operation information received by the communication unit 311.
The archive search unit 31 functions as a data search request accepting unit and part of the function of the data search unit.

  The user information storage unit 41 is a DBMS (Database Management System) that can use the SQL language, and as shown in FIG. 1, a user storage unit 42 that holds user identification information and the like, and a type storage unit that holds user type information 43, a restriction definition storage unit 44 that holds information for identifying a search restriction to the storage area unit 52, a search restriction storage unit 45 that holds a search restriction condition for the storage area unit 52, and a plurality of search restrictions. A role storage unit 46 that holds information to be managed as a role, a role definition storage unit 47 that manages a relationship between a role and a plurality of search restriction pairs, and a relationship between a search restriction group managed by the role definition storage unit 47 and a user And a role grant storage unit 48 for managing information.

Although details will be described later, the user information shown in FIG. 2 is stored in the user storage unit 42.
Further, the type storage unit 43 stores user type information shown in FIG.
The restriction definition storage unit 44 stores restriction definition information shown in FIG.
The search restriction storage unit 45 stores search restriction information shown in FIG.
The roll information shown in FIG. 6 is stored in the roll storage unit 46.
The role definition storage unit 47 stores role definition information shown in FIG.
The role grant storage unit 48 stores role grant information shown in FIG.
The restriction definition storage unit 44 is an example of a target storage area information storage unit and attribute search restriction correspondence information storage unit, and the role storage unit 46, role definition storage unit 47, and role grant storage unit 48 are attribute search restriction correspondence information storage. It is an example of a part.

The access management unit 40 performs registration, editing, deletion, and acquisition processing of user management information accumulated in the user information storage unit 41. The access management unit 40 executes a SELECT command, an INSERT command, an UPDATE command, and a DELETE command for the DBMS by using standardized driver software corresponding to the DBMS.
More specifically, when there is a data search request, the access management unit 40 selects any search restriction information stored in the search restriction storage unit 45 and stores the selected search restriction information in the search restriction storage. Obtained from the unit 45.
The access management unit 40 functions as a search restriction acquisition unit.

The archive management unit 51 performs processing for specifying e-mail archive data stored in the storage area unit 52 based on the search condition formula.
More specifically, the archive management unit 51 is a storage device (mail storage device 53, header storage device 54, text storage device 55, index storage device 56) targeted by the search restriction information acquired by the access management unit 40. The e-mail data is searched according to the data search restriction indicated in the search restriction information.
The archive management unit 51 performs a part of the function of the data search unit.

The storage area unit 52 includes a mail storage device 53, a header storage device 54, a text storage device 55, and an index storage device 56.
The mail storage device 53 is a DB for storing the mail data main body in a recoverable format.
The header storage device 54 is a DB for cutting out the text information of the header of the mail data and storing it in a recoverable format.
The text storage device 55 is a DB for cutting out parts other than the header of the mail data into text information and storing it in a recoverable format.
The index storage device 56 stores a full-text search index for searching text information of mail data at high speed.
The mail storage device 53, the header storage device 54, the text storage device 55, and the index storage device 56 are examples of data storage units that store data to be searched for data.
Further, only one storage area unit 52 is shown in FIG. 1, but a plurality of storage area units 52 may exist.

  With the functional configuration described above, the e-mail archive server 30 uses the user management information held by the e-mail archive server 30 according to the e-mail search command and user management command transmitted from the e-mail archive client 10. A search condition formula is generated, and e-mail data managed in the storage area unit 52 is specified and acquired via the archive management unit 51, and the acquired e-mail data is returned to the e-mail archive client 10. In the e-mail archive client 10, the e-mail management application 20 acquires the result of the e-mail search process and the operation process of the user management information with respect to the management client library 24, and presents it to the end user.

  Here, an outline of the operation of the e-mail archive server 30 according to the present embodiment will be described.

In the search restriction information stored in the search restriction storage unit 45, a restriction in data search is indicated in units of storage devices (units of data storage units).
The search restriction information is information illustrated in FIG.
Each record of the search restriction information includes a restriction definition name (restriction definition identifier) 451, an individual DB name 452, a range item 453, a range condition 454, and a text search condition 455.
The value of the restriction definition name 451 matches any value of the restriction definition name 441 shown in the restriction definition information of FIG.
The individual DB name 452 indicates one of the storage devices 53 to 56. A range item 453, a range condition 454, and a body text search condition 455 indicate restrictions in data search.
Further, two or more specific search restriction information among the plurality of search restriction information are stored in association with each other as joint search restriction information. Further, each search restriction information constituting the joint search restriction information is referred to as joint structure search restriction information.
In the example of FIG. 5, the search restriction information on the third line and the search restriction information on the fourth line in which the same restriction definition name: project_mng is set are joint search restriction information. The search restriction information on the third line and the search restriction information on the fourth line that constitute the joint search restriction information are joint structure search restriction information. Further, each of the solid-state structure search restriction information targets different storage devices.

Then, when there is a data search request from the e-mail archive client 10, the access management unit 40 searches for the restriction definition name extracted based on the user attribute of the data search request source user and the designation from the user. Restriction information (record) is selected, and the selected search restriction information (record) is acquired from the search restriction storage unit 45.
At this time, when the joint search restriction information is selected, the access management unit 40 acquires each piece of joint structure search restriction information constituting the joint search restriction information from the search restriction storage unit 45 in a lump. In the example of FIG. 5, a record on the third line and a record on the fourth line in which the same restriction definition name: project_mng is set are acquired at once.
Then, the archive management unit 51 limits the data search indicated by the search restriction information (range item, range condition, text search) from the storage devices 53 to 56 targeted by the search restriction information acquired by the access management unit 40. Search e-mail data according to (condition).
Further, when the solid-state configuration search restriction information is acquired at once by the access management unit 40, the archive management unit 51 starts from the storage devices 53 to 56 to which the solid-state configuration search restriction information acquired collectively is targeted. The electronic mail data is searched according to the data search restrictions (range items, range conditions, and text search conditions) indicated in each solidarity structure search restriction information.
Although details will be described later, the individual DB name, the range item, the range condition, and the text search condition indicated in the search restriction information are the data search condition formula (data search condition description used when the archive management unit 51 performs data search). The archive search unit 31 generates a data search condition expression by combining these descriptions. The archive management unit 51 searches for e-mail data using the data search condition formula generated by the archive search unit 31.
Then, the search result is transmitted from the email archive server 30 to the email archive client 10.

  Next, information that the user information storage unit 41 has will be described.

As described above, the user storage unit 42 stores the user information shown in FIG.
The user information includes a user name 421 that uniquely identifies the user, a creator 422 that indicates the person who performed the record creation process, a creation date 423 that indicates the date on which the creation process was performed, and the update of record information An updater 424 indicating who executed the process, an update date 425 indicating the date when the record information update process was executed, a password update date 426 indicating the date when the password update process was executed, and the user The field includes a password 427 in which information for authenticating the password is stored and a remark 428 in which arbitrary information regarding the record is stored.

The type storage unit 43 stores user type information shown in FIG.
The user type information includes a user name 431 that uniquely identifies the user and a user type 432 that restricts a process that can be executed by the user in four stages.

Further, the restriction definition storage unit 44 stores restriction definition information shown in FIG.
The restriction definition information includes a restriction definition name 441 in which information for identifying the access range of the email archive data is stored, a storage area name 442 in which information for identifying a storage area to be restricted is stored, and record creation processing The creator 443 indicating the person who executed the record, the creation date 444 storing the date when the creation process was executed, the updater 445 indicating the person who performed the record update process, and the record update process are executed. The update date 446 for storing the recorded date and the remark 447 for storing an arbitrary character string related to the record are provided as fields.
FIG. 4 shows an example of restriction definition information in the case where there are a plurality of storage area portions 52, and therefore there is a field for the storage area name 442.
As described above, when a plurality of storage area units 52 exist, the restriction definition information indicates the target storage area unit 52, and the restriction definition information is an example of the target storage area information.
Further, the restriction definition information is defined by the restriction definition name 441, through the restriction definition name 472 of the role definition information (FIG. 7), the role as the user attribute and the restriction definition name 451 (restriction definition identifier) of the search restriction information (FIG. 5). Is also an example of attribute search restriction support information.

The search restriction storage unit 45 stores the search restriction information shown in FIG.
The search restriction information includes a restriction definition name 451 in which information associated with the restriction definition name 441 in FIG. 4 is stored, and the application target of the search restriction character string is a mail storage device 53, a header storage device 54, a text storage device 55, In the individual DB name 452 in which information to be identified from the index storage device 56 is stored, the range item 453 in which item information acquired as a search result from the storage area unit 52 is stored, and the storage device designated in the individual DB name 452 A field condition 454 in which a search condition character string to be applied is stored and a text search condition 455 in which a unique search condition character string to be applied to the storage device specified in the individual DB name 452 is stored as fields.
The search condition stored in the text search condition 455 may be expressed by a regular expression.
I shown in the item of the individual DB name 452 represents the index storage device 56, h represents the header storage device 54, and t represents the text storage device 55.
Further, the range item 453, the range condition 454, and the text search condition 455 are described corresponding to the description rule of the data search condition description used when the archive management unit 50 searches for data.

Further, the roll storage unit 46 stores the roll information shown in FIG.
The role information includes a role name 461, a creator 462, a creation date 463, an updater 464, an update date 465, and a remark 466 as fields.

The role definition storage unit 47 stores role definition information shown in FIG.
The role definition information includes a role name 471, a restriction definition name 472, and a creation date 473 as fields.

Moreover, the role grant storage part 48 memorize | stores the role grant information shown in FIG.
The role grant information includes a role name 481, a role recipient 482, a role granter 483, and a setting date 484 as fields.
The person shown in the role recipient 482 is the person who has been granted the role shown in the role name 481, and the person shown in the role granter 483 assigns the role shown in the role name 481 to the person shown in the role recipient 482. It is the person who gave it.

  Role information, role definition information, and role grant information are information that associates a role that is a user attribute with search restriction information, and are examples of attribute search restriction correspondence information.

When there is a data search request from the e-mail archive client 10, the user name of the data search request source user is compared with the value of the role recipient 482 of the role grant information in FIG. Can be extracted from the value of the role name 481, and by comparing the extracted role with the role name 471 of FIG. 7, the restriction definition corresponding to the role can be extracted from the value of the restriction definition name 472. it can.
Further, by comparing the extracted restriction definition with the value of the restriction definition name 441 in FIG. 4, the storage area part targeted by the restriction definition can be extracted from the value of the storage area name 442.
Further, by comparing the extracted restriction definition with the value of the restriction definition name 451 in FIG. 5, the storage device and the data search restriction targeted by the restriction definition are identified as the individual DB name 452, the range item 453, and the range condition 454. , And can be extracted from the value of the text search condition 455.

Next, processing procedures of the email archive client 10 and the email archive server 30 will be described with reference to FIGS.
10 to 12 show a flow in which the processing procedures of the email archive client 10 and the email archive server 30 are described including the processing of the email management application 20, the access management unit 40, and the archive management unit 51.

First, the e-mail management application 20 receives a user name and password from a user.
The e-mail management application 20 includes a search unit 21 and a user management unit 22, and the user selects the search unit 21 or the user management unit 22 according to the processing content, and sets a user type necessary for the user who executes the processing. To do. When searching e-mail data stored in each storage device of the storage area unit 52, the search unit 21 is selected, and when registering or updating user information, user definition information, role information, etc., a user management unit 22 is selected.
Next, the email management application 20 inputs the user name, password, and user type received from the user to the connection unit of the management client library 24, and transmits a login request to the email archive server 30 (s200).
At this time, the connection destination e-mail archive server 30 is designated by designating the host name of the e-mail archive server 30 as the connection destination in the management client library 24.

  In the email archive server 30, the communication unit 311 receives a request from the email archive client 10 and generates a new process for executing the archive search unit 31 in the email archive server 30. When the e-mail archive server 30 receives a processing request from the e-mail archive client 10, a new process for executing the archive search unit 31 is always generated.

The archive search unit 31 inputs the received user name, password, and user type to the access management unit 40 and calls a user authentication command (s210).
Specifically, the access management unit 40 acquires the password 427 of the record whose user name 421 matches the received user name from the user information (FIG. 2) in the user storage unit 42.
The acquired password 427 is encrypted by a known technique.
The access management unit 40 performs a process of decrypting the password of the record, and verifies whether or not it matches the password transmitted from the e-mail archive server. If the passwords match, a record in which the received user name matches the user name 431 is acquired from the user type information (FIG. 3) in the type storage unit 43 (s231).
Next, the access management unit 40 compares the user type 432 of the acquired record with the received user type. There are four user types: SYSTEM, MANAGER, OPERATOR, and USER. SYSTEM has authority of SYSTEM in addition to authority of SYSTEM, MANAGER has authority of OPERATOR, USER in addition to authority of MANAGER. OPERATOR holds USER authority in addition to OPERATOR authority, and USER only has USER authority.
The access management unit 40 compares the user type of the record acquired from the type storage unit 43 with the received user type, and if the type is the same or the authority of the user type of the record is greater than the received user type, the user information Is matched, and the determination result is returned to the archive search unit 31 (s232).
The archive search unit 31 returns the determination result to the email archive client 10 via the communication unit 311 (s211).

The e-mail archive client 10 receives the determination result of the login request, and receives a request for a user search process from the user if it is normal. In the case of abnormality determination, the process of accepting the user name and password is repeated and accepted from the user (s201).
If the login request is determined to be normal, the e-mail management application 20 acquires a searchable range from the e-mail archive server 30 by the user.
Specifically, the e-mail management application 20 transmits a search range acquisition request with the user name of the user who has successfully logged in as an input value to the e-mail archive server 30 (s202).

The archive search unit 31 that has received the search range acquisition request executes the restriction definition list acquisition of the access management unit 40 using the received user name as a keyword (s212).
The access management unit 40 acquires one or more records from the role granting information (FIG. 8) in the role granting storage unit 48 in which the person who matches the received user name is described in the role recipient 482. Next, the role name 481 of each acquired record is extracted, and a record in which the role name 481 and the role name 471 match is acquired for the role definition information (FIG. 7) in the role definition storage unit 47 (s233).
The archive search unit 31 matches the role name 471 from the role definition information (FIG. 7) of the role definition storage unit 47 for all role names 481 acquired from the role grant information (FIG. 8) of the role grant storage unit 48. Records to be acquired, and a list in which the restriction definition names 472 of the records are extracted is created.
The archive search unit 31 returns the list as a list of restriction definitions that can be used by the user (s213).

The e-mail management application 20 presents all, a part, or a plurality of restriction definitions of the restriction definition list returned as an e-mail search range usable by the user as a set.
Next, the email management application 20 receives an email search request from the user.
Next, the e-mail management application 20 transmits information necessary for the search received from the user as a search request to the e-mail archive server 30 (s203).
Specifically, an acquisition item acquired as a search result, a search condition expression, and a restriction definition name are received from the user. Items that can be acquired from the archive management unit 51 include e-mail transmission and reception dates, e-mail To, Cc, and e-mail addresses described in the From, subject, number of e-mail attachments, e-mail file size, There are e-mail extensions, identifiers for identifying e-mail acquisition sources, and the like.
The email management application 20 receives one or more of the items specified by the user as acquisition items.
Further, the email management application 20 presents the restriction definition acquired from the email archive server 30 and receives one or more restriction definitions selected by the user.
Furthermore, the e-mail management application 20 acquires one or more condition items for searching e-mail archive data.
The search conditions that can be used by the archive management unit 51 include, for example, an e-mail transmission and reception date, the number of files attached to the e-mail, an e-mail file size, and an identifier for characterizing the e-mail acquisition source. A source address of an error mail transmitted when an e-mail delivery error occurs, a route to which the e-mail is delivered, a MIME (Multipurpose Internet Mail Extension) version, a source e-mail address, and a destination e-mail address And the email address of the carbon copy destination, the subject of the email, and an arbitrary character string in the body of the email.

The archive search unit 31 that has received the search request calls the restriction definition list command of the access management unit 40 (s214).
Specifically, the search restriction list acquisition of the access management unit 40 is executed using the user name as a keyword.
The access management unit 40 acquires one or a plurality of records having the same user name received from the role grant information (FIG. 8) in the role grant storage unit 48.
Next, the role name 481 of each acquired record is extracted, and a record in which the role name and the role name 471 match is acquired for the role definition storage unit 47 (s234).
The archive search unit 31 matches the role name 471 from the role definition information (FIG. 7) of the role definition storage unit 47 for all role names 481 acquired from the role grant information (FIG. 8) of the role grant storage unit 48. Records to be acquired, and a list in which the restriction definition names of the records are extracted is created. The list is compared with the received one or a plurality of restriction definitions, and it is confirmed whether or not a restriction definition not set in the role held by the user is received (s215).
When a restriction definition that is not set in the role held by the user is received (NO in s215), an error is returned as an abnormal search request.
In s234, the restriction definition list is reacquired. However, the restriction definition list acquired in s233 is stored in a memory, and the process of s215 is performed with reference to the stored restriction definition list. You may make it perform.

  When the e-mail management application 20 receives a search request error from the archive search unit 31, the e-mail management application 20 displays the received error content for the user and returns to the process of s202 (s204).

When it is confirmed that only the restriction definition set for the role held by the user has been received (YES in s215), the archive search unit 31 acquires search restriction information using the received restriction definition name as a keyword. (S216).
Specifically, the archive search unit 31 inputs the received restriction definition name to the access management unit 40 and executes restriction definition acquisition.
The access management unit 40 acquires a record in which the received restriction definition name matches the restriction definition name 441 from the search restriction information (FIG. 5) in the search restriction storage unit 45.
Next, the access management unit 40 acquires all records with matching received restriction definition names from the search restriction storage unit 45 and returns them to the archive search unit 31 in a lump (s235).
For example, if the received restriction definition name is project_mng, the access management unit 40 obtains the records on the third line and the record on the fourth line that match the value of the restriction definition name 451 in FIG. Return to the archive search unit 31 in a batch.

  Since the archive search unit 31 generates a search condition expression, the field phrase of one or more search restriction records associated with the acquired restriction definition record (FIG. 4), the restriction definition record, and the restriction definition name is normal. (S217).

FIG. 9 is an example of a search condition description executed by the archive management unit 51.
The archive management unit 51 describes an individual DB name to be searched in a SELECT clause and a WHERE clause as [storage area name] and [individual DB name] in order to search electronic mail archive data at high speed.
The restriction definition record (FIG. 4) and the search restriction record (FIG. 5) returned from the access management unit 40 are elements of the search condition description that can be executed by the archive management unit 50 (acquired item, storage area name, individual DB name, It consists of fields corresponding to the search condition expression.
The archive search unit 31 confirms that the acquired items received from the e-mail management application 20 match the storage area names of all the restriction definition records acquired from the access management unit 40 (s217).
If all the storage area names of the restriction definition record do not match (NO in s217), an error is returned to the e-mail management application 20 as an invalid restriction definition designation (s204).
The archive search unit 31 compares the acquired item received from the e-mail management application 20 with the range item 453 of the search restriction record acquired from the access management unit 40, and the acquired item not described in the range item 453 is e-mail managed. Confirm that it is not included in the acquisition items received from the application 20.
If an acquisition item not described in the range item 453 is included in the acquisition item received from the email management application 20, the archive search unit 31 returns an error to the email management application 20 as an invalid search specification.
At this time, the archive search unit 31 may ignore an acquisition item that is not described in the range item 453 without returning an error.
When a normal item is acquired (YES in s217), the archive search unit 31 acquires the values of the range item 453, the range condition 454, and the text search condition 455 of the search restriction record acquired from the access management unit 40. Then, a restriction condition expression 502 is created by concatenating the storage area name 442 of the restriction definition record linked with the restriction definition name and the individual DB name 452 of the search restriction record.
Specifically, a logical sum of the restriction condition expressions 502 for all search restriction records acquired from the access management unit 40 is generated. This process is performed for all search restriction records acquired from the access management unit 40. After generating a logical loop of the restriction condition formulas 502 of all search restriction records acquired from the access management unit 40, the search condition expression received from the user by the e-mail management application, the storage area name 442 of the restriction definition record, and the individual DB name The specified conditional expression 503 is generated on the basis of 452. Next, a condition description expression is generated by concatenating the restriction condition expression 502 and the specified condition expression 503 with a logical product (s218).

The archive search unit 31 inputs the condition description formula to the archive management unit 51 and calls a search command (s219).
The archive management unit 51 performs syntax analysis on the input search expression, and returns an error identifier to the archive search unit 31 when there is an error in the syntax.
If there is no error in the syntax, a search result is obtained from the storage device (the mail storage device 53 or the header storage device 54, the text storage device 55, and the index storage device 56) specified in the individual DB name 452 in the storage area unit 52. The record is specified, and the normal execution identifier is returned to the archive search unit 31.
At this time, the archive management unit 51 simultaneously returns an identifier for identifying the search execution state (s241).
The archive search unit 31 returns the normal execution or abnormal execution identifier notification returned from the archive management unit 51 to the e-mail management application 20 (s220).
At this time, the archive search unit 31 returns an identifier for identifying the search execution state.

  When receiving the normal execution identifier, the electronic mail management application 20 inputs an identifier for identifying the search state to the archive search unit 31 and transmits a search result acquisition request (s205). When the error identifier is received, the error content determined from the error identifier is presented to the user.

The archive search unit 31 inputs an identifier for identifying the search being executed by the archive management unit 51 from the search state identifier input from the email management application 20 to the archive management unit 51, and calls a search result acquisition command (s221). ).
The archive management unit 51 determines the search result being executed from the search state identifier input from the archive search unit 31, and returns the search result to the archive search unit 31 (s242).
The archive search unit 31 returns the search result returned from the archive management unit 51 to the e-mail management application 20 (s222).
The email management application 20 presents the search results returned from the archive search unit 31 to the user (s206).

As described above, according to the present embodiment, the archive search unit 31 uses a restriction definition name stored in the search restriction storage unit 45 by using the restriction definition name in the restriction definition storage unit 44. By obtaining the search restriction information at once, the access management unit 40 can reduce the number of communication processes for obtaining the search restriction record from the user information storage unit 41. In addition, power consumption can be suppressed by reducing the number of times of communication processing.
Further, the user information storage unit 41 has a field configuration corresponding to the syntax of the search expression executed by the archive management unit 51 in the record of the search limit storage unit 45, so that the search limit storage unit 45 does not perform parsing. The search condition formula to be input to the archive management unit 51 can be generated simply by concatenating the field items stored in.

As described above, conventionally, when receiving a data search request from a user, it is necessary to acquire access restriction conditions for each storage device constituting the storage area unit 52 in which the e-mail archive data is accumulated one by one. However, according to the present embodiment, the search restriction storage unit for the storage device constituting the storage area unit 52 is obtained only by performing the access restriction acquisition process specifying the restriction definition name 441 defined for the storage area unit 52. 45 multiple records can be acquired at once. Therefore, when a plurality of users use the electronic mail archive server, it is possible to reduce the processing time required for access management for the search processing designated by the user.
Therefore, according to the present embodiment, a storage capacity is reduced, header information management is facilitated, header information and the like are searched in an email archive server in which a large amount of email data transmitted and received at a plurality of user terminals is accumulated. In order to improve efficiency, when e-mail data is managed separately in a header storage device, a text storage device, a mail storage device, and an index storage device, the electronic data can be obtained without acquiring search limit records corresponding to each storage device one by one. It is possible to limit the scope of the search / acquisition processing according to the user who uses the electronic mail archive server that stores the mail archive data.

  Each function of the electronic mail archive server 30 according to this embodiment shown in FIG. 1 may be realized by an individual dedicated processor. Each function may be realized by the same hardware, or may be realized by a plurality of different hardware connected via a network.

  Moreover, although the example which searches e-mail data was demonstrated in this Embodiment, the data made into object are not restricted to e-mail data, What kind of data may be sufficient.

As described above, in the present embodiment, a large amount of e-mail data transmitted and received in a plurality of client terminals is accumulated and stored, the accumulated e-mail data is searched, and all or part of the e-mail is acquired, and an e-mail archiving system An e-mail archiving system that accepts conditions for searching e-mail data stored in a user from a user has been described.
More specifically, the email archive system according to the present embodiment is:
A storage area unit comprising a header storage device, a text storage device, an electronic mail storage device, and one or a plurality of storage devices that accumulate all or part of electronic mail data such as an index storage device;
An archive management unit that executes a search condition description described by a syntax rule that specifies an identifier of the storage device that constitutes a storage area unit in each element of a SELECT phrase, a FROM phrase, and a WHERE phrase when performing an e-mail search;
A search unit that receives search conditions from the user,
A search restriction storage unit that records a search range for each storage device;
A restriction definition storage unit that records a set of a plurality of search restriction records;
A search condition in which an e-mail search processing unit for generating a search expression description is designated by a user by providing an access management unit that acquires a plurality of records of a related search limit storage unit from a record of a limit definition storage unit at a time An e-mail archiving system that can reduce the time required to retrieve search restriction records applied to is described.

The restriction definition storage unit
Further, a value that associates a plurality of search restriction records and a value that specifies the storage area part are managed as a set,
The search restriction storage unit
Further, it has been described that the value associated with the search restriction record and the value divided into the individual syntax elements of the search condition description executed by the archive management unit are managed as a set.

The e-mail search processing unit
Furthermore, by providing means for generating a search expression description by concatenating the attribute value of the restriction definition storage unit, the attribute value of the search restriction storage unit, and the value acquired by the search unit,
Explained how to reduce the time to generate new search expression description.

The e-mail search processing unit
Furthermore, the value that identifies the storage area part of the records of a plurality of restriction definition storage parts is compared,
When the value specifying the storage area part stored in all the records of the restriction definition storage part specified when generating the search expression description is the same,
It is determined that a valid restriction definition storage record has been specified,
It has been described that the search expression description is generated by concatenating the attribute value of the restriction definition storage unit, the attribute value of the search restriction storage unit, and the value acquired by the search unit.

The e-mail archiving system includes:
A user storage unit that identifies a user performing a search of the email archive system;
A role storage unit that manages a plurality of restriction definition records as a batch,
A role definition storage unit for recording the relationship between the role storage unit and the restriction definition storage unit;
A role grant storage unit that records the association between the user and the role;
When the e-mail search processing unit applies the search restriction record to the search condition, the user who performs the search, the role and the management of the restriction definition are confirmed, and the search restriction record that the user is not related to is set as the search condition. Explained preventing the application.

Embodiment 2. FIG.
In the first embodiment described above, the e-mail archiving system is configured by the e-mail archiving server and the e-mail archiving client. Next, when the e-mail archiving client is configured on the Web server. 1 shows an embodiment for realizing an electronic mail archive system as a Web system.

FIG. 13 is a functional block diagram of the entire network system in such a case.
The network system according to the present embodiment includes an application client terminal 601, an email archive application server 603, and an email archive server 30, which are one or a plurality of information processing devices connected to the network.

The application client terminal 601 is one or more information processing apparatuses in which a WWW browser 602 is installed, and includes a desktop computer, a mobile phone, a PDA (Personal Digital Assistants) (registered trademark), and the like.
The e-mail archive application server 603 transmits an e-mail search command to the e-mail archive server 30 in response to a request from the WWW browser 602 that is a client, and the search result information acquired from the e-mail archive server 30 is sent to the WWW. Provide to browser 602.
The application client terminal 601 receives a search command for email archive data from an end user. Specifically, the web page of the email archive application 607 is requested to the communication unit 604 of the email archive application server 603 from the WWW browser 602.
The email archive application server 603 registers user information for using the email archive server 30 via the email archive application 607 in the email archive server 30 in response to a request from the WWW browser 602 as a client. A command for editing and deletion is transmitted, and the result information is provided to the WWW browser 602 via the communication unit 604.
The e-mail application server 603 transmits a search command to one or a plurality of e-mail archive servers 30 and acquires the search result.
Since the email archive server 30 has the same configuration as that of the first embodiment, description thereof is omitted here.
The application client terminal 601, the e-mail archive application server 603, and the e-mail archive server 30 have a hardware configuration (CPU, memory) included in a normal information processing apparatus necessary for executing a program for realizing each function. , A hard disk on which the program is installed, and a communication interface such as a LAN (Local Area Network).

  Next, the functional configuration of the e-mail application server 603 will be described.

The e-mail application server 603 relates to an e-mail archive application 607 that performs e-mail management processing, a management client library 24 for the e-mail archive application 607 to operate the e-mail archive server 30, and requests transmitted from the WWW browser 602. A communication unit 604 that acquires request information, which is information, and executes an e-mail archive application 607.
The communication unit 604 generates an HTML (HyperText Markup Language) document for accepting input from the user, and inputs a search condition for the email archive server using the email archive application 607. A screen for doing so is presented to the user.
As described above, when the user inputs a desired operation to the form on the HTML document generated by the communication unit 604, the request parameter is set. The communication unit 604 acquires request parameters input to the form by the user, and executes the search unit 605 and the user management unit 606 of the email archive application 607.
Since the processing of the search unit 605 and the user management unit 606 is the same as that of the first embodiment, the description thereof is omitted here.

  According to the present embodiment, since the access management method in the e-mail archive system realized by the first embodiment can be provided to the user in the form of a Web system, special software is installed in the application client terminal 601. Therefore, since the e-mail search for the e-mail archive server 30 can be performed, the application client terminal 601 that uses the e-mail archive server 30 can be easily added.

Finally, the hardware of the e-mail archive client 10, e-mail archive server 30, application client terminal 601, e-mail archive application server 603 (hereinafter referred to as e-mail archive server 30 or the like) shown in the first and second embodiments. A hardware configuration example will be described.
FIG. 14 is a diagram illustrating an example of hardware resources such as the email archive server 30 described in the first and second embodiments.
The configuration in FIG. 14 is merely an example of the hardware configuration of the e-mail archive server 30 or the like, and the hardware configuration of the e-mail archive server 30 or the like is not limited to the configuration illustrated in FIG. It may be a configuration.

14, the e-mail archive server 30 or the like includes a CPU 911 (also referred to as a central processing unit, a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, or a processor) that executes a program.
The CPU 911 is connected to, for example, a ROM (Read Only Memory) 913, a RAM (Random Access Memory) 914, a communication board 915, a display device 901, a keyboard 902, a mouse 903, and a magnetic disk device 920 via a bus 912. Control hardware devices.
Further, the CPU 911 may be connected to an FDD 904 (Flexible Disk Drive), a compact disk device 905 (CDD), a printer device 906, and a scanner device 907. Further, instead of the magnetic disk device 920, a storage device such as an optical disk device or a memory card (registered trademark) read / write device may be used.
The RAM 914 is an example of a volatile memory. The storage media of the ROM 913, the FDD 904, the CDD 905, and the magnetic disk device 920 are an example of a nonvolatile memory. These are examples of the storage device.
A communication board 915, a keyboard 902, a mouse 903, a scanner device 907, an FDD 904, and the like are examples of input devices.
The communication board 915, the display device 901, the printer device 906, and the like are examples of output devices.

  The communication board 915 is connected to the network. For example, the communication board 915 may be connected to a LAN (local area network), the Internet, a WAN (wide area network), or the like.

The magnetic disk device 920 stores an operating system 921 (OS), a window system 922, a program group 923, and a file group 924.
The programs in the program group 923 are executed by the CPU 911 using the operating system 921 and the window system 922.
For example, the magnetic disk device 920 constitutes the storage area unit 52.

The RAM 914 temporarily stores at least part of the operating system 921 program and application programs to be executed by the CPU 911.
The RAM 914 stores various data necessary for processing by the CPU 911.

The ROM 913 stores a BIOS (Basic Input Output System) program, and the magnetic disk device 920 stores a boot program.
When the e-mail archive server 30 or the like is started, the BIOS program in the ROM 913 and the boot program for the magnetic disk device 920 are executed, and the operating system 921 is started by the BIOS program and the boot program.

  The program group 923 stores programs that execute the functions described as “˜units” in the description of the first and second embodiments. The program is read and executed by the CPU 911.

In the file group 924, in the description of the first and second embodiments, “determination of”, “confirmation of”, “comparison of”, “acquisition of”, “update of”, and “setting of” ”,“ Registration of ”,“ Selection of ”,“ Generation of ”, etc. Information, data, signal values, variable values, and parameters indicating the results of the processing are represented by“ ˜file ”and“ ˜ It is stored as each item of “Database”.
The “˜file” and “˜database” are stored in a recording medium such as a disk or a memory. Information, data, signal values, variable values, and parameters stored in a storage medium such as a disk or memory are read out to the main memory or cache memory by the CPU 911 via a read / write circuit, and extracted, searched, referenced, compared, and calculated. Used for CPU operations such as calculation, processing, editing, output, printing, and display.
Information, data, signal values, variable values, and parameters are stored in the main memory, registers, cache memory, and buffers during the CPU operations of extraction, search, reference, comparison, calculation, processing, editing, output, printing, and display. It is temporarily stored in a memory or the like.
In addition, the arrows in the flowcharts described in the first and second embodiments mainly indicate input / output of data and signals, and the data and signal values are the RAM 914 memory, the FDD 904 flexible disk, the CDD 905 compact disk, and the magnetic field. Recording is performed on a recording medium such as a magnetic disk of the disk device 920, other optical disks, mini disks, DVDs, and the like. Data and signals are transmitted online via a bus 912, signal lines, cables, or other transmission media.

  In addition, what is described as “˜unit” in the description of the first and second embodiments may be “˜circuit”, “˜device”, “˜device”, and “˜step”, It may be “to procedure” or “to process”. That is, what is described as “˜unit” may be realized by firmware stored in the ROM 913. Alternatively, it may be implemented only by software, or only by hardware such as elements, devices, substrates, and wirings, by a combination of software and hardware, or by a combination of firmware. Firmware and software are stored as programs in a recording medium such as a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, and a DVD. The program is read by the CPU 911 and executed by the CPU 911. That is, the program causes the computer to function as “to part” in the first and second embodiments. Alternatively, the computer executes the procedure and method of “to unit” in the first and second embodiments.

  As described above, the electronic mail archive server 30 or the like shown in the first and second embodiments includes a CPU as a processing device, a memory as a storage device, a magnetic disk, a keyboard as an input device, a mouse, a communication board, and a display device as an output device. The computer includes a communication board and the like, and realizes the functions indicated as “˜unit” as described above using these processing devices, storage devices, input devices, and output devices.

FIG. 3 is a diagram illustrating an example of a system configuration according to the first embodiment. FIG. 5 shows an example of user information according to the first embodiment. FIG. 5 is a diagram showing an example of user type information according to the first embodiment. FIG. 6 is a diagram showing an example of restriction definition information according to the first embodiment. FIG. 6 is a diagram showing an example of search restriction information according to the first embodiment. FIG. 6 is a diagram illustrating an example of roll information according to the first embodiment. FIG. 6 is a diagram illustrating an example of role definition information according to the first embodiment. The figure which shows the example of the role provision information which concerns on Embodiment 1. FIG. FIG. 5 is a diagram showing an example of a data search condition description according to the first embodiment. FIG. 4 is a flowchart showing an operation example according to the first embodiment. FIG. 4 is a flowchart showing an operation example according to the first embodiment. FIG. 4 is a flowchart showing an operation example according to the first embodiment. FIG. 4 is a diagram illustrating an example of a system configuration according to a second embodiment. The figure which shows the hardware structural examples, such as an email archive server which concerns on Embodiment 1 and 2. FIG.

Explanation of symbols

  10 Email Archive Client, 20 Email Management Application, 21 Search Unit, 22 User Management Unit, 24 Management Client Library, 30 Email Archive Server, 31 Archive Search Unit, 40 Access Management Unit, 41 User Information Storage Unit, 42 User Storage unit, 43 type storage unit, 44 restriction definition storage unit, 45 search restriction storage unit, 46 roll storage unit, 47 roll definition storage unit, 48 roll grant storage unit, 51 archive management unit, 52 storage area unit, 53 mail storage Device, 54 header storage device, 55 text storage device, 56 index storage device, 311 communication unit, 312 e-mail search processing unit, 313 user management processing unit, 601 application client terminal, 602 WWW browser, 603 e-mail Archive application server, 604 communication unit, 605 the search unit, 606 user management section, 607 e-mail archive application.

Claims (9)

A plurality of data storage units for storing data to be searched;
A search restriction storage unit that stores a plurality of search restriction information in which a restriction in data search is indicated in units of data storage units;
When there is a data search request, select any search restriction information, a search restriction acquisition unit that acquires the selected search restriction information from the search restriction storage unit,
A data search unit that searches for data according to the data search restriction indicated in the search restriction information from the data storage unit targeted by the search restriction information acquired by the search restriction acquisition unit;
The search restriction storage unit
Two or more specific search restriction information among a plurality of search restriction information is stored in association with each other as joint search restriction information,
The search restriction acquisition unit
When the joint search restriction information is selected when there is a data search request, each of the joint structure search restriction information constituting the joint search restriction information is collectively acquired from the search restriction storage unit,
The data search unit
A data search is performed according to the data search restriction indicated in each joint configuration search restriction information from the data storage unit targeted by each joint configuration search restriction information collectively acquired by the search restriction acquisition unit. Data management device. The search restriction storage unit
2. The data management apparatus according to claim 1, wherein two or more pieces of search restriction information having different target data storage units are stored in association with each other as joint search restriction information. The search restriction storage unit
A plurality of search restriction information in which a target data storage unit and a restriction in data search are described corresponding to a description rule of a data search condition description used at the time of data search are stored,
The data search unit
The data search condition description is generated by combining the description of the data storage unit and the description of the data search restriction included in the search restriction information acquired by the search limit acquisition unit, and the generated data search condition description is used. The data management apparatus according to claim 1 or 2, wherein data search is performed. The data management device further includes:
A plurality of storage area units each including a plurality of data storage units;
A target storage area information storage unit for storing target storage area information describing the storage area part targeted for the search restriction information in correspondence with the description rule of the data search condition description;
The search restriction acquisition unit
Retrieve search restriction information and its target storage area information,
The data search unit
Data search is performed by combining the description of the storage area part included in the target storage area information acquired by the search restriction acquisition part, the description of the data storage part included in the search restriction information, and the description of the restriction on data search. The data management apparatus according to claim 3, wherein a condition description is generated, and data search is performed using the generated data search condition description. The data search unit
When a plurality of target storage area information is acquired by the search restriction acquisition unit, it is determined whether the same storage area part is described in all of the acquired plurality of target storage area information, and all the target storage areas 5. The data management apparatus according to claim 4, wherein data search is performed when the same storage area portion is described in the information. The data management device further includes:
An attribute search restriction correspondence information storage unit for storing attribute search restriction correspondence information for associating user attributes with search restriction information;
A data search request receiving unit that receives a data search request including identification information of the user of the data search request source,
The search restriction acquisition unit
The user attribute of the user of the data search request source is determined based on the identification information included in the data search request, and the search restriction information is selected based on the determined user attribute and the attribute search restriction correspondence information. Item 6. The data management device according to any one of Items 1 to 5. The search restriction storage unit
Each search restriction information is stored in association with a restriction definition identifier,
The attribute search restriction correspondence information storage unit includes:
Store attribute search restriction correspondence information that associates user attributes with restriction definition identifiers,
The search restriction acquisition unit
The search restriction information is selected based on the determined user attribute, the association between the user attribute and the restriction definition identifier in the attribute search restriction correspondence information, and the association between the search restriction information and the restriction definition identifier. The data management apparatus according to claim 6. The search restriction storage unit
8. The data management apparatus according to claim 7, wherein each of the joint configuration search restriction information constituting the joint search restriction information is stored in association with a restriction definition identifier common to the joint structure search restriction information. The search restriction acquisition unit
When a plurality of user attributes are determined for the user of the data search request source, based on the determined plurality of user attributes and the association between the user attribute and the search limit information in the attribute search limit corresponding information, the search limit information is The data management device according to claim 6, wherein the data management device is selected.

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