JPH11327997A - Integrated access system for multidata by decentralized object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate data use by providing integrated access environment for different data attribute or decentralized data operation. SOLUTION: A data provider 90 requests an integrated data access manager 12 which manages a data directory 70 to register data names, attribute names, and the contents of processes executed at a data operation request by data to be operated. The integrated data access manager 12 stores the registration contents in a data attribute table 71 in the data directory. The data provider 90 requests the integrated data access manager 12 to register attribute names as class names of objects, the numbers of elements, and the arrangements of the structures by the attributes of the data to be operated. The integrated data access manager 12 stores the registration contents in an object structure table 72. Here, the object structures of the respective registered data are made distinct by making the attribute names in the data attribute table 72 correspond to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling access to existing database data and multimedia data such as moving pictures, still pictures, and audio in a distributed object environment.

[0002]

2. Description of the Related Art Existing database data, moving images,
When handling multimedia data such as still images and audio,
The data user needs to be aware of the contents, attributes, location of the data, and the like, and handle the data using an access means unique to the data access system that handles the respective data. When dealing with various types of related data, unless a data is migrated to a dedicated multimedia database or an object-oriented database, etc., in order to synchronize updates between data, a UAP
It was necessary for the device to devise measures such as transaction recovery and processing sequence management.

[0003]

When a user who is building an existing relational database system migrates to a multimedia database, the database currently used supports those functions, or a new multimedia database is used. We needed to build a database system. In general, the amount of multimedia data such as moving images, still images, and sounds tends to be significantly larger than in the past, and it can be said that data distribution is essential. In the case of distributing data and updating related data over a plurality of sites, means for updating them synchronously is required.

An object of the present invention is to manage data having different types and attributes, such as data on an existing database and multimedia data on an object-oriented database, as objects, and to provide a meaningful data object set. By providing a means to operate the same object as a single object with a unified object interface, and by treating each object as a distributed object and enabling simultaneous control of simultaneous updating of each object, The purpose is to provide a means that can be accessed without being aware of the location.

[0005]

In order to achieve the above object, the invention of claim 1 provides a unified object interface which is a unified operation interface for data having a plurality of different attributes, and an attribute of each data is provided. / A data directory that stores object structures and operation processes, a unified data manager that manages the data directory, such as registration / reference of attributes / object structure and operation processes of this data, and an object divider that distributes operations to each data access system , The operation request and the acquisition of the access result are realized by a unified interface. Further, according to the invention of claim 2, when the management sources of each data are distributed to a plurality of systems, the unified data access manager stores the management sources and attributes of the data and manages the data directory using the distributed object function. By doing so, operations such as data registration and search can be performed in any system. Further, according to the third aspect of the present invention, when a plurality of related data are operated collectively, the unified data access manager performs commitment management for each data access system in cooperation with the distributed object management function and the TP monitor. Thus, the consistency between the data of each data access system is guaranteed. The invention according to claim 4 further comprises a legacy wrapper for wrapping data managed by the existing data access system in the non-object environment into the object environment, and maps non-object structure data to the object structure registered in the data directory. By doing so, existing data in the non-object environment can be operated from the object environment.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

First, an example of data directory registration will be described with reference to FIG.

For data to be operated in the present system, the attributes and object structure of the data are registered in the data directory in advance. The data provider 90 stores a data name, an attribute name, and the contents of each processing to be executed when a data operation request is made for each data to be operated, in the data directory 70.
A registration request is made to the unified data access manager 12 that manages The unified data access manager 12 stores the requested registration contents in the data attribute table 71 in the data directory. An object structure for mapping the access result to the object is also registered in the data directory. The data provider 90 requests the unified data access manager 12 that manages the data directory 70 to register the attribute name, which is the class name of the object, the number of elements, and the arrangement of the structure for each attribute of the data to be operated. The unified data access manager 12 stores the requested registration contents in the object structure table 72 in the data directory. Here, the attribute names in the data attribute table 71 and the attribute names in the object structure table 72 are associated with each other to clarify the object structure of each registered data.

Next, an example of a data operation request will be described with reference to FIG.

The data user 20 makes an operation request for data to be accessed using the unified object interface 11. Unified Object Interface 11
When an operation request is issued to the data access manager 12, the data access manager 12 acquires from the data directory 70 the management source system information of the target data and the processing content corresponding to the operation request, and notifies the object divider 13. The object divider 13 executes the processing contents acquired from the data directory 70 to the appropriate data access system 30. At this time, if the target data access system is located in the other system 2, the processing is requested to the distributed object access function 61 and to the data access system 40 of the other system 2 using the distributed object environment.

Next, an example of reception of a data access result will be described with reference to FIG.

The data access system 30 requested to access the data returns an access result to the object divider in the form of stream data 101 which is the data format of the own system. When the object divider 13 returns the result stream data 101 to the unified data access manager 12, the unified data access manager 12 acquires the object structure of the target data from the data directory, and requests the legacy wrapper 121 to wrap the data in the object format. The legacy wrapper 121 wraps the result stream data 101 into a result object 100 format and returns an access result to the data user 20 in the format of the result object 100 via the unified object interface 11.

An example of using a distributed object environment will be described with reference to FIG.

The data directory 70 and the distributed system management information 8 which is the location information of each data access system
1 is a distributed repository 8 under the distributed object environment 60.
It is managed with 0. The distributed system management information 81 includes a data name, an object name, and a property. The data name of the distributed system management information 81 is the data directory 70
It corresponds to the data name in. From data user 20,
When the data A operation request 201 is made, the unified data manager 12 requests the distributed repository management function 63 to access the distributed repository 80, and acquires the distributed system management information 81 of the data A310. The object divider 13
An object reference is acquired by a name service or the like based on the object name in the distributed system management information 81, and an object access request is issued to the distributed object access function 61 by designating the object reference. The distributed object access function 61 activates the access object 320 corresponding to the specified object reference in the other system 3 and executes the operation. Accordingly, since the data operation requests 201 and 202 from the data user 20 are executed using the distributed object environment, the same operation can be executed as one system environment from any system in the distributed object environment 60. Can be. In the case of data existing in the own system 1 such as the ABC data 510, when the data C operation request 203 is received, the object divider directly activates the access object 520 to execute the operation.
Accordingly, data operations in the own system 1 are executed without going through the distributed object environment, and thus performance degradation can be prevented.

An example of distributed transaction control will be described with reference to FIG.

A plurality of data access systems 300, 4
Transactions over 00 and 500 are controlled using the distributed transaction management 62 under the distributed object environment 60. The distributed transaction management 62 automatically performs the commitment control 62 for each data access system and executes a commit process in response to a commit request 205 of a transaction that spans the plurality of data access systems 300, 400, and 500 from the data user 20. As a result, consistency can be guaranteed even for data distributed to a plurality of systems 3, 4, and 5.

Finally, an embodiment of the overall flow of the present invention will be described with reference to FIG.

This system is an A access system 30 for storing / controlling data A310 which is text data.
0, B access system 400 for storing / controlling data B 410 as image data, data C as audio data
It has a C access system 500 that stores / controls 510. The data stored in each access system has an association with each other. In this example, by displaying the text of the data A and the image data of the data B together and reproducing the sound of the data C, the content 21 has one meaning for the data user. When the data user wants to reproduce a certain content 21, the data user makes a data acquisition request to the multi data broker 10. At this time, a data acquisition request is made using a unified object interface Query () without being aware of attributes such as whether each data is an image or a sound. When the multi data broker 10 receives a data acquisition request, the unified data manager 12 searches the data directory, acquires the attribute of the data, the system for storing the data, and the processing contents for data access, and acquires the data to the object divider 13. Request. The object divider 13 executes the data acquisition system from the data directory 70 and requests the data access system for the data acquisition processing. A access system 300 is an SQL-based system, and the object divider 13 uses the SQL acquired from the data directory.
Execute The B access system 400 is an image object-based system, and the object divider 13 executes an image search method acquired from the data directory. Since the acquired A data 310 acquired from the A access system 300 is a stream data in a non-object format, the unified data access manager 12 wraps the object data in the object structure registered in the data directory and sends the result to the data user 20 in the object format. Back. The acquired data can be reproduced without being aware of the contents of the data by executing the data reproduction method Play (). For example, the content 21 is defined as one object consisting of data A310, data B410, and data C510, and the data objects are aggregated, and an operation request is issued to the content 21 object to thereby obtain data A310, data B410, and data C510
Can be operated. When updating data, the A data access system 300 and the B data access system 40
By associating each of the data access systems 500 with the distributed transaction management function (TP monitor) 62, it is possible to guarantee the consistency among the data A 310, data B 410, and data C 510.

According to the present embodiment, various data such as text data, image data, audio data, etc. can be easily operated with a unified interface, so that it is necessary for a data user to master attributes and operations for each data to be written. Therefore, there is an effect of simplifying the use of data. Also, by cooperating with the distributed transaction management / TP monitor, it is possible to guarantee the consistency between related data.

[0020]

According to the present invention, various data managed by a plurality of data access systems can be easily operated with a unified interface, so that the data user does not need to learn the attributes and operations of each data, thereby simplifying data use. effective.

Further, according to the present invention, there is no need for the data user to know the target data access system and the location of the data, and there is no need for a user operation such as connection switching, so that there is an effect of reducing the user load. . Also, by unifying the data arrangement management, there is an effect of reducing data management costs.

Further, according to the present invention, there is no need for a recovery operation when a failure occurs by automatically guaranteeing the consistency between a plurality of related data, so that the cost required for the recovery operation can be reduced. . In addition, there is an effect of preventing data destruction.

Further, according to the present invention, since the data of the system in the non-object environment can be operated from the object environment, there is an effect of reducing the cost of rebuilding the data and the system when effectively utilizing the existing assets. .

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of the entire system of the present invention.

FIG. 2 is a diagram showing an example of data directory registration according to the present invention.

FIG. 3 is a diagram illustrating an example of a data operation request according to the present invention.

FIG. 4 is a diagram illustrating an example of receiving a data access result according to the present invention.

FIG. 5 is a diagram illustrating an example of using a distributed object environment according to the present invention.

FIG. 6 is a diagram illustrating an example of distributed transaction control according to the present invention.

FIG. 7 is a diagram showing an example of a multi-data access implementation according to the present invention.

[Explanation of symbols]

1 ... own system, 2, 3, 4, 5 ... other systems, 10 ...
The entire multi-data system according to the present invention, 11 ... Unified object interface, 12 ... Unified data access manager, 13 ... Object divider, 20 ... Data user, 21 ... Content, 30, 40, 50 ... Data access system, 31, 41, 51 ... data, 60
... distributed object environment, 61 ... distributed object access function, 62 ... distributed transaction management function (TP
Monitor), 63: distributed repository management function, 70: data directory, 71: data attribute table, 72: object structure table, 80: distributed repository, 81
... Distributed system management information, 90 ... Data provider, 100
... Result object, 101 ... Result stream data,
300 A (text data) access system, 31
0 ... text data A, 320 ... data A access object, 400 ... B (image data) access system, 410 ... image data B, 420 ... data B access object, 500 ... C (voice data) access system, 510 ... voice data C, 520: Data C access object

Claims (4)

[Claims] An object manages data of an existing database, multimedia data such as a moving image, a still image, and audio, etc., managed by a plurality of data management systems as one object. Unified data access manager that registers and manages operations (methods) in the data directory, defined attributes, object dividers that call data operation functions (methods) managed by each data management system for each location, and data users By providing a unified object interface function that provides a unified object access interface for data access to data users, by providing a unified access environment for operating multiple different data attributes or distributed data The contents of (genus ) Without being aware of the, unified operation,
A data access system characterized by being searchable and updateable by an interface. 2. A distributed object function is applied to the management of a data directory in which a management source of each data managed by a unified data access manager is registered, so that a user can manage each data on any system device. A data access system characterized in that it can be accessed without being aware of the data. 3. Even when handling complex data objects such as texts and images, when updating data managed by a plurality of different data management systems, the unified data access manager uses a distributed transaction management function and a TP.
A transaction operation request is issued to the monitor, and the distributed transaction management function and the TP monitor perform commitment control of each data management system, thereby performing synchronization control between respective data and guaranteeing consistency at the time of data update. Data access system. 4. A legacy wrapper for requesting existing data and operation in a non-object environment according to data operation processing contents registered in a data directory, mapping an access result to a previously registered object structure, and wrapping the object environment. A data access system characterized in that existing data in a non-object environment can be operated in a unified manner from a distributed object environment.