CN108427689A - Information acquisition method and device - Google Patents
Information acquisition method and device Download PDFInfo
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- CN108427689A CN108427689A CN201710081656.4A CN201710081656A CN108427689A CN 108427689 A CN108427689 A CN 108427689A CN 201710081656 A CN201710081656 A CN 201710081656A CN 108427689 A CN108427689 A CN 108427689A
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- metadata
- configuration information
- data source
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/25—Integrating or interfacing systems involving database management systems
- G06F16/252—Integrating or interfacing systems involving database management systems between a Database Management System and a front-end application
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/28—Databases characterised by their database models, e.g. relational or object models
- G06F16/283—Multi-dimensional databases or data warehouses, e.g. MOLAP or ROLAP
Abstract
The embodiment of the invention discloses a kind of information acquisition method and information acquisition device, the metadata for accurately and real-time obtaining data source.Present invention method includes：The connection configuration information that OLAP is sent is obtained, the connection configuration information includes and connect the relevant information of data source；It is sent to the data source according to the connection configuration information and obtains request, so that the data source asks feedback metadata according to the acquisition；Obtain the metadata that the data source is sent；The metadata is sent to the OLAP.In this way, OLAP can obtain the metadata in data source in real time, if change to the metadata of data source, OLAP can also be accurately obtained the metadata after variation, avoid that the metadata caused by time-lag effect is inaccurate when on miscellaneous equipment by meta-data preservation.
Description
Technical field
The present invention relates to data processing field more particularly to a kind of information acquisition methods and device.
Background technology
In big data field, olap analysis is the weight of data analysis (based on the Ad Hoc query analysis in multi-dimensional data)
Want one of means.The data source category of OLAP has very much, such as：Relational database, NoSQL databases, csv (Comma-
Separated Values；Comma separated value) file etc..
The method that existing OLAP obtains the metadata of data source is to pass through similar SQL (Structured Query
Language；Structured query language) inquiry mode, take out the metadata of target data source, be stored in external storage system
In the metadata table of (such as MySQL), that is, store the metadata of these different types of data sources by external storage system.
When OLAP is needed using metadata, the metadata information preserved in this storage system is inquired, is obtained corresponding as a result, being protected with this
Card OLAP is accurately analyzed.Specific operational process, as shown in Figure 1.
But it because being the meta-data preservation that will inquire in metadata table, is provided by intermediate metadata table
Service, if updated to the structure of data source in viability, needs through monitoring objective data source or notice
Metadata storage system, to carry out relevant updates to metadata table.Not so the mistakes such as data mismatch can be caused.Such side
Case will generate the resource overhead to the real time monitoring of data source, and can additionally depend on the storage system of storage metadata information
System.
Invention content
An embodiment of the present invention provides a kind of information acquisition method and devices, for accurately and real-time obtaining data source
Metadata.
In order to solve the above-mentioned technical problem, an embodiment of the present invention provides following technical schemes：
A kind of information acquisition method, the method includes：
The connection configuration information that OLAP is sent is obtained, the connection configuration information includes and connect the relevant letter of data source
Breath；
It is sent to the data source according to the connection configuration information and obtains request, so that the data source is obtained according to
Take request feedback metadata；
Obtain the metadata that the data source is sent；
The metadata is sent to the OLAP.
In order to solve the above-mentioned technical problem, the embodiment of the present invention additionally provides following technical scheme：
A kind of information acquisition device, including：
First acquisition unit, the connection configuration information for obtaining OLAP transmissions, the connection configuration information include and connect
Connect the relevant information of data source；
First transmission unit obtains request, so that institute for being sent to the data source according to the connection configuration information
It states data source and feedback metadata is asked according to the acquisition；
Second acquisition unit, the metadata sent for obtaining the data source；
Second transmission unit, for sending the metadata to the OLAP.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages：
The connection configuration information that OLAP is sent is obtained, connection configuration information includes and connect the relevant information of data source.Root
It is sent to data source according to connection configuration information and obtains request, so that data source asks feedback metadata according to acquisition；To obtain
After the metadata that data source is sent, metadata is sent to OLAP.In this way, when OLAP will obtain the metadata of data source, as long as to
Information acquisition device sends connection configuration information, and then information acquisition device can obtain in real time according to the connection configuration information
The metadata of corresponding data source, to feed back to OLAP, because being the real-time metadata obtained in data source, to the member of data source
If data change, OLAP can also be accurately obtained the metadata after variation, avoid and set meta-data preservation other
The metadata caused by time-lag effect is inaccurate when standby upper.
Description of the drawings
Fig. 1 is the schematic diagram of the existing method for the metadata that OLAP obtains data source；
Fig. 2 is a kind of method flow diagram for information acquisition method that one embodiment of the invention provides；
Fig. 3 is a kind of method flow diagram for information acquisition method that another embodiment of the present invention provides；
Fig. 4 is the metadata structure schematic diagram that the method for embodiment illustrated in fig. 3 is related to；
Fig. 5 is a kind of structural schematic diagram for information acquisition device that another embodiment of the present invention provides.
Specific implementation mode
An embodiment of the present invention provides a kind of information acquisition method and information acquisition devices, for accurately and real-time obtaining
The metadata of data source.
Fig. 2 is a kind of method flow diagram of information acquisition method provided in an embodiment of the present invention.The side of the embodiment of the present invention
Method can be used on information acquisition device, referring to Fig.2, the method for the embodiment of the present invention includes：
Step 201：Obtain the connection configuration information that OLAP is sent, connection configuration information includes and to connect data source relevant
Information；
Step 202：It is sent to data source according to connection configuration information and obtains request, so that data source please negate according to acquisition
Present metadata；
Step 203：Obtain the metadata that data source is sent；
Step 204：Metadata is sent to OLAP.
Optionally,
After obtaining the metadata that data source is sent, method further includes：
Metadata is packaged into target object according to the data definition pre-established, data definition Column, Table and
The definition of Schema, target object are and the relevant object of Column, Table and Schema；
Metadata is sent to OLAP, including：
Target object is sent to OLAP.
Optionally,
After obtaining the connection configuration information that OLAP is sent, method further includes：
Judge locally whether prestore metadata corresponding with connection configuration information；
If local prestore metadata corresponding with connection configuration information, the metadata locally to prestore is sent to OLAP；
If local do not prestore metadata corresponding with connection configuration information, execute according to connecting configuration information to data
Source sends the step of obtaining request；
After obtaining the metadata that data source is sent, method further includes：
Establish the correspondence of connection configuration information and metadata；
Store correspondence.
Optionally,
Metadata is packaged into target object according to the data definition pre-established, including：
By dynamic binding, metadata is packaged into target object corresponding with the data definition pre-established.
Optionally,
Data source includes database and file system.
In conclusion obtaining the connection configuration information that OLAP is sent, connection configuration information includes related to connection data source
Information.It is sent to data source according to connection configuration information and obtains request, so that data source asks feedback metadata according to acquisition；
To which after obtaining the metadata that data source is sent, metadata is sent to OLAP.In this way, OLAP will obtain the metadata of data source
When, as long as sending connection configuration information to information acquisition device, then information acquisition device is according to the connection configuration information
The metadata for obtaining corresponding data source in real time, to feed back to OLAP, because being the real-time metadata obtained in data source, to
If the metadata of data source changes, OLAP can also be accurately obtained the metadata after variation, avoid and protect metadata
The metadata caused by time-lag effect is inaccurate when there are on miscellaneous equipment.
Fig. 3 is a kind of method flow diagram of information acquisition method provided in an embodiment of the present invention.The side of the embodiment of the present invention
Method is illustrated so that information acquisition device executes as an example, and refering to Fig. 3, the method for the embodiment of the present invention includes：
Step 301：Obtain the connection configuration information that OLAP is sent.
Wherein, connection configuration information includes and connect the relevant information of data source, the data source may include database with
File system.
When OLAP will obtain the metadata of data source, by recalls information acquisition device, one is sent to the information acquisition device
Configuration information is connected, to which information acquisition device gets connection configuration information.In the embodiment that the present invention has, which matches
Confidence breath can be carried by call request, i.e. OLAP sends call request to information acquisition device, which includes connection
Configuration information.
Olap analysis is one of the important means of data analysis i.e. based on the Ad Hoc query analysis in multi-dimensional data.
Wherein, connection configuration information includes and connect the relevant information of data source, and the connection configuration information is according to different
Data source has different concrete forms.
If for example, being database in data source, the concrete form for connecting configuration information is as follows：
Wherein, OLAP can generate the connection configuration information according to the specific requirement for the metadata to be obtained.
Wherein, data source (Data Source)：The source of data, the device or original media of data required for being to provide.
Metadata (Metadata)：The data for describing data, to the descriptive information of data and information resources.
Step 302：Judge locally whether prestore metadata corresponding with connection configuration information；If local prestore and connect
The corresponding metadata of configuration information is connect, thens follow the steps 303, it is no to then follow the steps 304.
It is appreciated that information acquisition device may be provided in a variety of different systems, which can also collect
At in equipment, in order to improve the efficiency that OLAP obtains metadata, metadata can be prestored on the device, these metadata can
For OLAP before send connection configuration information when, information acquisition device according to the connection configuration information execute hereafter the step of, from
And after getting corresponding metadata, the correspondence of the connection configuration information and the metadata can be established out, and in local
The correspondence is stored in the memory module of equipment, to which information acquisition device, can after getting connection configuration information later
Judge whether the connection configuration information subsequently obtained is identical as the connection configuration information in the correspondence of storage, if identical,
Information acquisition device can read metadata corresponding with the connection configuration information according to the correspondence from being locally stored in module,
It is i.e. local to prestore metadata corresponding with connection configuration information.
Wherein, local memory module for example can be caching.
It is appreciated that the embodiment of the present invention is not especially limited the quantity of the metadata in the correspondence that prestores, it can
Can also be multiple to be one, you can be collection of metadata.
It is appreciated that local can prestore multiple correspondences, it can be to these by different connection configuration informations
Correspondence distinguishes.
Step 303：The metadata locally to prestore is sent to OLAP.
If local prestore metadata corresponding with connection configuration information, information acquisition device can prestore the local
Metadata be sent to OLAP.In this way, by the correspondence in the connection configuration information and metadata that locally prestore, acquisition of information
Device can be not necessarily to obtain metadata to data source according to connection configuration information every time, if local prestore and connect with confidence
Corresponding metadata is ceased, local metadata can be sent to OLAP, present invention side can be improved in this way by information acquisition device
The execution efficiency of method.
Step 304：It is sent to data source according to connection configuration information and obtains request.
If local do not prestore metadata corresponding with connection configuration information, information acquisition device matches confidence according to connection
It ceases to send to data source and obtains request.
After information acquisition device gets connection configuration information, because the connection configuration information includes related to connection data source
Information, to information acquisition device can according to connection configuration information to data source send obtain request so that data source root
Feedback metadata is asked according to obtaining；
In an embodiment of the present invention, the model structure of the information acquisition device may include four parts：Interface layer is abstracted
Layer realizes layer and adaptation layer.The concrete function of these structures is as follows：
Interface layer：Define the common interfaces such as Column, Table, Schema.
Level of abstraction：Interface layer is abstracted, realizes part public method.
Realize layer：Class and immutable class are can be changed including realizing, is Adaptation Layer Service.
Adaptation layer：The variable class of layer or immutable class are realized by succession, are fitted to different data source storage systems.
Specifically, adaptation layer is to be adapted to different types of data-storage system, such as relational database, file etc..
After information acquisition device gets connection configuration information, the adaptation layer of information acquisition device is according to connection configuration information, such as root
It is sent to corresponding database or file system according to the address information in connection configuration information and obtains request.
After corresponding data source gets acquisition request, asked to trigger by the acquisition, to which data source obtains the data source
On the corresponding metadata of data, then, data source sends the metadata to the information acquisition device.
Step 305：Obtain the metadata that data source is sent；
Data source is asked according to acquisition to after information acquisition device feedback metadata, and information acquisition device can obtain this yuan
Data.The metadata is that OLAP needs the metadata obtained.
Step 306：Metadata is packaged into target object according to the data definition pre-established.
Wherein, the definition of data definition Column, Table and Schema, target object be and Column, Table and
The relevant objects of Schema.
The definition of Column, Table and Schema are pre-established on the information acquisition device, information acquisition device can
The metadata got is packaged into corresponding target object according to the data definition.
Wherein, in information acquisition device includes interface layer, level of abstraction, realizes the embodiment of layer, the step 306 is then main
By interface layer, level of abstraction, realize that layer is realized.
Specifically, metadata is packaged by target object according to the data definition pre-established, including：By dynamically tying up
It is fixed, metadata is packaged into target object corresponding with the data definition pre-established.That is, information acquisition device gets first number
According to rear, the actual type of cited object is judged according to interface layer and level of abstraction dynamic binding, is then packaged.
Wherein, in an embodiment of the present invention, the metadata structure of data definition can be with as shown in figure 4, i.e. foundation includes pass
System, is followed successively by Column, Table and Schema from the inside to the outside.
Step 307：Target object is sent to OLAP.
After information acquisition device obtains target object, you can the target object is sent to OLAP, so that OLAP is obtained
Get the metadata of needs.
It is appreciated that in the embodiment that has of the present invention, information acquisition device can not execute step 304, and directly to
OLAP sends the metadata obtained.
Step 308：Establish the correspondence of connection configuration information and metadata.
Information acquisition device can also establish connection configuration information and metadata after obtaining the metadata that data source is sent
Correspondence as execute step 302 to which the connection configuration information subsequently sent for OLAP does matched preparation and do standard
It is standby.After information acquisition device establishes the correspondence, the correspondence can be stored in the memory module of local device.
Optionally, in order to enable can reflect the variation of metadata in database in time in the correspondence locally to prestore,
There are one timers in information acquisition device, and according to the timing of the timer, the verification in information acquisition device meeting period is local
Whether the metadata in the correspondence of storage is consistent with the metadata in corresponding database, if inconsistent, acquisition of information
Device can update the metadata to prestore, it is unmatched so as to avoid data the occurrence of.
It is appreciated that in the embodiment that the present invention has, information acquisition device can not execute step 302, correspondingly, step
Rapid 303 and step 308 can not also execute, information acquisition device get OLAP transmission connection configuration information after, direct root
Metadata is obtained from database according to the connection configuration information, and the metadata is fed back into OLAP.
In this way, the method for the embodiment of the present invention, by information acquisition device to OLAP feedback metadatas, independent of additional
Storage system, reduce dependence and the expense of system.Also, only when OLAP proposes query metadata request, i.e., to information
It, just can be by obtaining first number under current state in information acquisition device to data source when acquisition device sends connection configuration information
It is believed that breath, the metadata obtained in this way will be more accurate.Also, the information acquisition device can accomplish that part is general, and adaptation is big
Partial data source storage system.The program has been evaded to the resource overhead of the real time monitoring of data source with additional dependent on storage member
The storage system of data information, and the metadata information of data source is directly acquired in real time, it is ensured that the standard of metadata information
True property and real-time provide accurate foundation for OLAP data analysis.
In conclusion on information acquisition device, the connection configuration information that OLAP is sent is obtained, connection configuration information includes
With connect the relevant information of data source.Then, it is sent to data source according to connection configuration information and obtains request, so that data source root
Feedback metadata is asked according to obtaining.To which after obtaining the metadata that data source is sent, metadata is sent to OLAP.In this way, OLAP
When obtaining the metadata of data source, configuration information is connected as long as being sent to information acquisition device, then information acquisition device root
The metadata that corresponding data source can be obtained in real time according to the connection configuration information, to feed back to OLAP, because being to obtain in real time
Metadata in data source, if the metadata to data source changes, OLAP can also be accurately obtained the member after variation
It is inaccurate to avoid meta-data preservation the metadata caused by time-lag effect when on miscellaneous equipment for data.
Fig. 5 is a kind of structural schematic diagram of information acquisition device provided in an embodiment of the present invention.Refering to Fig. 5, the present invention is real
The information acquisition device for applying example includes：
First acquisition unit 501, the connection configuration information for obtaining OLAP transmissions, connection configuration information include and connect
The relevant information of data source；
First transmission unit 502 obtains request, so that data source root for being sent to data source according to connection configuration information
Feedback metadata is asked according to obtaining；
Second acquisition unit 503, the metadata for obtaining data source transmission；
Second transmission unit 504, for sending metadata to OLAP.
Optionally,
Device further includes：
Encapsulation unit 505, for metadata to be packaged into target object, data definition according to the data definition pre-established
For the definition of Column, Table and Schema, target object is and the relevant object of Column, Table and Schema；
Second transmission unit 504 is additionally operable to send target object to OLAP.
Optionally,
Device further includes judging unit 506,
Judging unit 506, for judging locally whether prestore metadata corresponding with connection configuration information；
Second transmission unit 504, if being additionally operable to locally prestore metadata corresponding with connection configuration information, to OLAP
Send the metadata locally to prestore；
If local do not prestore metadata corresponding with connection configuration information, the first transmission unit 502 is executed according to even
It connects configuration information and sends the step of obtaining request to data source；
Device further includes：
Unit 507 is established, the correspondence for establishing connection configuration information and metadata；
Storage unit 508, for storing correspondence.
Optionally,
Encapsulation unit 505 is additionally operable to, by dynamic binding, metadata is packaged into corresponding with the data definition pre-established
Target object.
Optionally,
Data source includes database and file system.
In conclusion obtaining the connection configuration information that OLAP is sent, connection configuration information includes related to connection data source
Information.It is sent to data source according to connection configuration information and obtains request, so that data source asks feedback metadata according to acquisition；
To which after obtaining the metadata that data source is sent, metadata is sent to OLAP.In this way, OLAP will obtain the metadata of data source
When, as long as sending connection configuration information to information acquisition device, then information acquisition device is according to the connection configuration information
The metadata for obtaining corresponding data source in real time, to feed back to OLAP, because being the real-time metadata obtained in data source, to
If the metadata of data source changes, OLAP can also be accurately obtained the metadata after variation, avoid and protect metadata
The metadata caused by time-lag effect is inaccurate when there are on miscellaneous equipment.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be the indirect coupling by some interfaces, device or unit
It closes or communicates to connect, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can be stored in a computer read/write memory medium.Based on this understanding, technical scheme of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to before
Stating embodiment, invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to preceding
The technical solution recorded in each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
Modification or replacement, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of information acquisition method, which is characterized in that the method includes：
The connection configuration information that OLAP is sent is obtained, the connection configuration information includes and connect the relevant information of data source；
It is sent to the data source according to the connection configuration information and obtains request, so that the data source is asked according to the acquisition
Seek feedback metadata；
Obtain the metadata that the data source is sent；
The metadata is sent to the OLAP.
2. according to the method described in claim 1, it is characterized in that,
After the metadata for obtaining the data source transmission, the method further includes：
The metadata is packaged into target object according to the data definition pre-established, the data definition be Column,
The definition of Table and Schema, the target object are and the relevant object of Column, Table and Schema；
It is described to send the metadata to the OLAP, including：
The target object is sent to the OLAP.
3. according to the method described in claim 1, it is characterized in that,
After the connection configuration information for obtaining OLAP transmissions, the method further includes：
Judge locally whether prestore metadata corresponding with the connection configuration information；
If local metadata corresponding with the connection configuration information is prestored, sends and described locally prestore to the OLAP
Metadata；
Do not prestore metadata corresponding with the connection configuration information if local, execute it is described according to the connection with confidence
It ceases to the data source and sends the step of obtaining request；
After the metadata for obtaining the data source transmission, the method further includes：
Establish the correspondence of the connection configuration information and the metadata；
Store the correspondence.
4. according to the method described in claim 2, it is characterized in that,
The metadata is packaged into target object by the data definition that the basis pre-establishes, including：
By dynamic binding, the metadata is packaged into target object corresponding with the data definition pre-established.
5. method according to any one of claims 1 to 4, which is characterized in that
The data source includes database and file system.
6. a kind of information acquisition device, which is characterized in that including：
First acquisition unit, the connection configuration information for obtaining OLAP transmissions, the connection configuration information include and connect number
According to the relevant information in source；
First transmission unit obtains request, so that the number for being sent to the data source according to the connection configuration information
Feedback metadata is asked according to the acquisition according to source；
Second acquisition unit, the metadata sent for obtaining the data source；
Second transmission unit, for sending the metadata to the OLAP.
7. device according to claim 6, which is characterized in that
Described device further includes：
Encapsulation unit, for the metadata to be packaged into target object according to the data definition pre-established, the data are fixed
Justice is the definition of Column, Table and Schema, and the target object is and Column, Table and Schema are relevant right
As；
Second transmission unit is additionally operable to send the target object to the OLAP.
8. device according to claim 6, which is characterized in that
Described device further includes judging unit,
The judging unit, for judging locally whether prestore metadata corresponding with the connection configuration information；
Second transmission unit, if being additionally operable to locally prestore metadata corresponding with the connection configuration information, to institute
It states OLAP and sends the metadata locally to prestore；
If local do not prestore metadata corresponding with the connection configuration information, first transmission unit executes described
According to the connection configuration information the step of obtaining request is sent to the data source；
Described device further includes：
Unit is established, the correspondence for establishing the connection configuration information and the metadata；
Storage unit, for storing the correspondence.
9. device according to claim 7, which is characterized in that
The encapsulation unit is additionally operable to the data definition pair for by dynamic binding, the metadata being packaged into and being pre-established
The target object answered.
10. according to claim 6 to 9 any one of them device, which is characterized in that
The data source includes database and file system.
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