CN109117432A - A kind of method and device obtaining data - Google Patents
A kind of method and device obtaining data Download PDFInfo
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- CN109117432A CN109117432A CN201710481038.9A CN201710481038A CN109117432A CN 109117432 A CN109117432 A CN 109117432A CN 201710481038 A CN201710481038 A CN 201710481038A CN 109117432 A CN109117432 A CN 109117432A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/48—Program initiating; Program switching, e.g. by interrupt
- G06F9/4806—Task transfer initiation or dispatching
- G06F9/4843—Task transfer initiation or dispatching by program, e.g. task dispatcher, supervisor, operating system
- G06F9/4881—Scheduling strategies for dispatcher, e.g. round robin, multi-level priority queues
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- General Engineering & Computer Science (AREA)
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- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
The invention discloses a kind of method and devices for obtaining data, are related to field of computer technology.One specific embodiment of this method includes executing following steps: receiving the scheduling request for obtaining each data from the database；According to the scheduling request, the attribute information of each data is stored in red black tree, wherein the attribute information includes: the time-out time and the Data Identification；Judge whether the corresponding time-out time of the data exceeds preset threshold, and scheduling is executed to the database according to judging result and is appointed.The Data Identification of timeout datum because using the technological means into red black tree is stored by the embodiment, so overcome the prior art using document data bank storage timeout datum Data Identification so as to cause acquisition from database the slower technical problem of data return times, and then reach improve obtain data processing speed technical effect.
Description
Technical field
The present invention relates to field of computer technology, and in particular to a kind of method and device for obtaining data.
Background technique
In the prior art, complete primary database it is synchronous with from the data between database, referred to as primary database and from
Principal and subordinate's data duplication between database, the purpose of this method be that so that the data that are stored in primary database with from data
The data stored in library are consistent.However, can be because of principal and subordinate's data during carrying out interface calling to master data from database
It replicates and there are latency issues.Due to needing to carry out the duplication of principal and subordinate's data from database and being somebody's turn to do the data reality from database lookup
Be on border it is existing, the data only searched are synchronized to this from database, so as to cause calling from number not yet
It is sky according to the information returned after the interface in library.
In order to obtain accurate data from database from this in time, a kind of acquisition data are proposed in the prior art
Method, i.e., obtain data from database interface but in the absence of finding the data, another file type just arrived into number storage
In database, periodically (worker) scheduling poll then is carried out to from database to the data in this document type database, thus
It again attempts to obtain corresponding data from database from this according to the data stored in this document type database.
However, at least there are the following problems in the prior art for inventor's discovery in realizing process of the present invention:
As the growth of index times is presented in the data volume of leader follower replication, and due to according to the acquisition number being periodically polled
It according to mode, does not simply fail to obtain corresponding data in time from database from this, and because to from the regular of database
(worker) poll is dispatched, so that the load abruptly increase of database in the present case, more affects the timeliness of data acquisition,
It moves in circles and falls into vicious circle.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of method and device for obtaining data, return is effectively improved to reach
The real-time of data.
To achieve the above object, according to an aspect of the invention, there is provided a kind of method for obtaining data, wherein institute
Stating data in the database has uniqueness Data Identification, and the data have corresponding surpass in principal and subordinate's data reproduction process
When the time, which is characterized in that the method includes execute following steps:
Receive the scheduling request for obtaining each data from the database；
According to the scheduling request, the attribute information of each data is stored in red black tree, wherein the attribute is believed
Breath includes: the time-out time and the Data Identification；
Judge whether the corresponding time-out time of the data exceeds preset threshold, and according to judging result to the number
Scheduling is executed according to library to appoint.
Optionally, this method further include: according to the increasing or decreasing sequence of the time-out time successively by each number
According to the attribute information save on each node into the red black tree.
Optionally, this method further include: if the time-out time be more than or equal to preset threshold, will with it is described time-out when
Between the corresponding Data Identification delete；
If the time-out time be less than the preset threshold, by the data according to the time-out time be incremented by or
Sequence of successively decreasing executes scheduler task to the database, obtains the corresponding data of the Data Identification.
According to another aspect of the present invention, a kind of device for obtaining data is additionally provided, wherein the data are in data
There is uniqueness Data Identification in library, and the data have corresponding time-out time in principal and subordinate's data reproduction process, it is special
Sign is that described device includes:
Receiving module, for receiving the scheduling request for obtaining each data from the database；
Memory module, for according to the scheduling request, the attribute information of each data to be stored in red black tree,
Described in attribute information include: the time-out time and the Data Identification；
Execution module, for judging whether the corresponding time-out time of the data exceeds preset threshold, and according to sentencing
Disconnected result executes scheduling to the database and appoints.
Optionally, the memory module is also used to: successively will be each according to the increasing or decreasing sequence of the time-out time
The attribute information of the data saves on each node into the red black tree.
Optionally, the execution module is also used to: if the time-out time be more than or equal to preset threshold, will with it is described
The corresponding Data Identification of time-out time is deleted；
If the time-out time be less than the preset threshold, by the data according to the time-out time be incremented by or
Sequence of successively decreasing executes scheduler task to the database, obtains the corresponding data of the Data Identification.
According to an aspect of the present invention, a kind of electronic equipment for obtaining data is additionally provided, wherein the electronic equipment packet
It includes: one or more processors；Storage device, for storing one or more programs, when one or more of programs are by institute
One or more processors execution is stated, so that one or more of processors are realized such as the side provided by the invention for obtaining data
Method.
According to an aspect of the present invention, a kind of computer-readable medium is additionally provided, wherein described program is by processor
It is realized when execution such as the method provided by the invention for obtaining data.
One embodiment in foregoing invention have the following advantages that or the utility model has the advantages that
Because storing the technological means into red black tree using by the Data Identification of timeout datum, existing skill is overcome
Art using document data bank storage timeout datum Data Identification so as to cause acquisition from database data return times compared with
Slow technical problem, and then reach the technical effect for improving the processing speed for obtaining data.
Further effect possessed by above-mentioned non-usual optional way adds hereinafter in conjunction with specific embodiment
With explanation.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.In the accompanying drawings:
Fig. 1 is the schematic diagram of the main flow of the method according to an embodiment of the present invention for obtaining data；
Fig. 2 is the structural schematic diagram according to an embodiment of the present invention by data deposit red black tree；
Fig. 3 is the schematic diagram of the main modular of the device according to an embodiment of the present invention for obtaining data；
Fig. 4 is adapted for the structural schematic diagram for the computer system for realizing the terminal device of the embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing, an exemplary embodiment of the present invention will be described, including the various of the embodiment of the present invention
Details should think them only exemplary to help understanding.Therefore, those of ordinary skill in the art should recognize
It arrives, it can be with various changes and modifications are made to the embodiments described herein, without departing from scope and spirit of the present invention.Together
Sample, for clarity and conciseness, descriptions of well-known functions and structures are omitted from the following description.
Herein, it is to be understood that in related term:
One, primary database generally refers to real-time service database；
Two, from database, it is generally used for establishing one and the duplicate database environment of primary database, and from database
Effect and use occasion generally have it is following several:
1, it can switch to and work on from database after main database server breaks down as post data library；
2, the work such as backup and data statistics can made from database, is not influencing the performance of primary database in this way.
Illustrative methods
Fig. 1 is the schematic diagram of the main flow of the method according to an embodiment of the present invention for obtaining data.Wherein, the data
There is uniqueness Data Identification in the database, and when the data have corresponding time-out in principal and subordinate's data reproduction process
Between, which is characterized in that the method includes executing following steps:
Step S101: the scheduling request for obtaining each data from the database is received；
Step S102: according to the scheduling request, the attribute information of each data is stored in red black tree, wherein institute
Stating attribute information includes: the time-out time and the Data Identification；
Step S103: judging whether the corresponding time-out time of the data exceeds preset threshold, and is tied according to judgement
Fruit executes scheduling to the database and appoints.
Optionally, this method further include: according to the increasing or decreasing sequence of the time-out time successively by each number
According to the attribute information save on each node into the red black tree.
Optionally, this method further include: if the time-out time be more than or equal to preset threshold, will with it is described time-out when
Between the corresponding Data Identification delete；
If the time-out time be less than the preset threshold, by the data according to the time-out time be incremented by or
Sequence of successively decreasing executes scheduler task to the database, obtains the corresponding data of the Data Identification.
Embodiment
The present invention is specifically described below with reference to the specific embodiment of a practical application scene, however is worth noting
Be the specific embodiment merely to better describing the present invention, do not constitute improper limitations of the present invention.
For the logistics attribute project of electric business, content is substantially are as follows: upstream ERP (primary database) needs downstream each
A service database (from database) pushes (push) information attribute value.Each service database is needed through each business number
The corresponding ownership storehouse list of each commodity is obtained according to the special interface in library, and according to commodity code (SKU), but due to industry
Business database (from database) needs to carry out principal and subordinate's data duplication, and is carried out searching corresponding ownership storehouse according to commodity code
When list, storehouse ownership list may be synchronized to from database not yet, although storehouse ownership list is to exist,
It is that calling interface return information can occur for above situation for sky.
In realizing process of the present invention, successively time-out is had not been obtained by the incremental order according to time-out time by the present invention
To commodity code (SKU) be stored in respectively into a red-black tree construction, as shown in Figure 2.
Specifically, time-out time is specified by system, and each node includes following four data:
1, time-out time (time)
2, commodity code (sku)
3, whether time-out (overtime, 0 represent have not timed out, 1 represents time-out)
4, the millisecond number (atime) of record addition time, millisecond number when storage records.
In time-out calculates, a variable time_min_intl is had, for storing the time-out of current red black tree minimum unit
Duration.
For example, a length of 50 when minimum, then the value of time_min_intl is 50 in Fig. 2；Its effect is that traversal is current red
Black tree minimum unit, and the value (time-out time time) of minimum unit is assigned to time_min_intl, wherein time_min_
Intl is the basic unit of each training in rotation.
It is also desirable to have a time_max_overtime, for setting max-timeout unit.
When the time of poll being more than time_max_overtime, knot removal is fallen.
When the time of traversal be more than setting times when, and be greater than time_max_overtime when, will be in entity
Overtime is set as 1, indicates to have timed, out.
For the task that time-out calculates, it is related to 3 altogether
One is used to be inserted into timeout datum to red black tree；
One is used to training in rotation red black tree and finds training in rotation minimum unit and execute scheduler task；
One is used to training in rotation timeout datum and deletes data；
In addition, additionally providing the method to cooperate between multiple methods below with reference to Fig. 2.
Ot_insert_event_process method is defined, for indicating that the merchandise news by time-out is inserted into red black tree
In；
Ot_time_intl_process method is defined, for searching the time interval data of minimum unit in red black tree；
Time_event_process method is defined, warehouse information is called for handling the commodity of the condition of satisfaction, updates library
It leaves and is dealt into storehouse operation；
Ot_event_process method is defined, for handling the data of time-out, and is proposed from red black tree.
Ot_wait_process method is defined, for carrying out waiting operation.
(1) information attribute value of time-out can be inserted into red black tree by ot_insert_event_process first；
(2) it is then polled, calls time_event_process method, realization process is as follows in method, and checking is
It is no that there are minimum interval unit time_intl, if it does not, minimum training in rotation unit is defined,
(3) time-out is judged whether by ot_wait_process ().
If had not timed out, sku is updated, is called update_sku ()；It checks whether storehouse finds data simultaneously, does not find,
Then carry out the calling of next round.If it is found, redefining minimum unit and deleting the node；
If overtime, it was demonstrated that still do not acquire data in storehouse within the unit time, data are deleted from node.
Fig. 3 is the schematic diagram of the main modular of the device according to an embodiment of the present invention for obtaining data.Wherein, the data
There is uniqueness Data Identification in the database, and when the data have corresponding time-out in principal and subordinate's data reproduction process
Between, which is characterized in that described device 2 includes:
Receiving module 31, for receiving the scheduling request for obtaining each data from the database；
Memory module 32, for according to the scheduling request, the attribute information of each data to be stored in red black tree,
Wherein the attribute information includes: the time-out time and the Data Identification；
Execution module 33, for judging whether the corresponding time-out time of the data exceeds preset threshold, and according to
Judging result executes scheduling to the database and appoints.
Optionally, the memory module 32 is also used to: successively will be each according to the increasing or decreasing sequence of the time-out time
The attribute information of a data saves on each node into the red black tree.
Optionally, the execution module 33 is also used to:, will be with institute if the time-out time is more than or equal to preset threshold
The corresponding Data Identification of time-out time is stated to delete；
If the time-out time be less than the preset threshold, by the data according to the time-out time be incremented by or
Sequence of successively decreasing executes scheduler task to the database, obtains the corresponding data of the Data Identification.
Since the device provided by the invention for obtaining data is the corresponding device of the above method, therefore, not repeat them here.
Below with reference to Fig. 4, it illustrates the computer systems 400 for the terminal device for being suitable for being used to realize the embodiment of the present invention
Structural schematic diagram.Terminal device shown in Fig. 4 is only an example, function to the embodiment of the present invention and should not use model
Shroud carrys out any restrictions.
As shown in figure 4, computer system 400 includes central processing unit (CPU) 401, it can be read-only according to being stored in
Program in memory (ROM) 402 is loaded into the program in random access storage device (RAM) 403 from storage section 408
And execute various movements appropriate and processing.In RAM 403, also it is stored with system 400 and operates required various program sum numbers
According to.CPU 401, ROM 402 and RAM 403 are connected with each other by bus 404.Input/output (I/O) interface 405 also connects
To bus 404.
I/O interface 405 is connected to lower component: the importation 406 including keyboard, mouse etc.；It is penetrated including such as cathode
The output par, c 407 of spool (CRT), liquid crystal display (LCD) etc. and loudspeaker etc.；Storage section 408 including hard disk etc.；
And the communications portion 409 of the network interface card including LAN card, modem etc..Communications portion 409 via such as because
The network of spy's net executes communication process.Driver 410 is also connected to I/O interface 405 as needed.Detachable media 411, such as
Disk, CD, magneto-optic disk, semiconductor memory etc. are mounted on as needed on driver 410, in order to read from thereon
Computer program be mounted into storage section 408 as needed.
Particularly, disclosed embodiment, the process described above with reference to flow chart may be implemented as counting according to the present invention
Calculation machine software program.For example, embodiment disclosed by the invention includes a kind of computer program product comprising be carried on computer
Computer program on readable medium, the computer program include the program code for method shown in execution flow chart.?
In such embodiment, which can be downloaded and installed from network by communications portion 409, and/or from can
Medium 411 is dismantled to be mounted.When the computer program is executed by central processing unit (CPU) 401, executes and of the invention be
The above-mentioned function of being limited in system.
It should be noted that computer-readable medium shown in the present invention can be computer-readable signal media or meter
Calculation machine readable storage medium storing program for executing either the two any combination.Computer readable storage medium can be for example but not limited to
Electricity, magnetic, optical, electromagnetic, infrared ray or semiconductor system, device or device, or any above combination.It is computer-readable
The more specific example of storage medium can include but is not limited to: have electrical connection, the portable computing of one or more conducting wires
Machine disk, hard disk, random access storage device (RAM), read-only memory (ROM), erasable programmable read only memory (EPROM
Or flash memory), optical fiber, portable compact disc read-only memory (CD-ROM), light storage device, magnetic memory device or above-mentioned
Any appropriate combination.In the present invention, computer readable storage medium can be it is any include or storage program it is tangible
Medium, the program can be commanded execution system, device or device use or in connection.And in the present invention,
Computer-readable signal media may include in a base band or as the data-signal that carrier wave a part is propagated, wherein carrying
Computer-readable program code.The data-signal of this propagation can take various forms, and including but not limited to electromagnetism is believed
Number, optical signal or above-mentioned any appropriate combination.Computer-readable signal media can also be computer-readable storage medium
Any computer-readable medium other than matter, the computer-readable medium can be sent, propagated or transmitted for being held by instruction
Row system, device or device use or program in connection.The program code for including on computer-readable medium
It can transmit with any suitable medium, including but not limited to: wireless, electric wire, optical cable, RF etc. or above-mentioned any conjunction
Suitable combination.
Flow chart and block diagram in attached drawing are illustrated according to the system of various embodiments of the invention, method and computer journey
The architecture, function and operation in the cards of sequence product.In this regard, each box in flowchart or block diagram can generation
A part of one module, program segment or code of table, a part of above-mentioned module, program segment or code include one or more
Executable instruction for implementing the specified logical function.It should also be noted that in some implementations as replacements, institute in box
The function of mark can also occur in a different order than that indicated in the drawings.For example, two boxes succeedingly indicated are practical
On can be basically executed in parallel, they can also be executed in the opposite order sometimes, and this depends on the function involved.Also it wants
It is noted that the combination of each box in block diagram or flow chart and the box in block diagram or flow chart, can use and execute rule
The dedicated hardware based systems of fixed functions or operations is realized, or can use the group of specialized hardware and computer instruction
It closes to realize.
Being described in module involved in the embodiment of the present invention can be realized by way of software, can also be by hard
The mode of part is realized.Described module also can be set in the processor, for example, can be described as: a kind of processor packet
Include receiving module 31, memory module 32, execution module 33.Wherein, the title of these units under certain conditions constitute pair
The restriction of the unit itself.
As on the other hand, the present invention also provides a kind of computer-readable medium, which be can be
Included in equipment described in above-described embodiment；It is also possible to individualism, and without in the supplying equipment.Above-mentioned calculating
Machine readable medium carries one or more program, when said one or multiple programs are executed by the equipment, makes
Obtaining the equipment includes:
Step S101: the scheduling request for obtaining each data from the database is received；
Step S102: according to the scheduling request, the attribute information of each data is stored in red black tree, wherein institute
Stating attribute information includes: the time-out time and the Data Identification；
Step S103: judging whether the corresponding time-out time of the data exceeds preset threshold, and is tied according to judgement
Fruit executes scheduling to the database and appoints.
The method and device of the acquisition data provided according to embodiments of the present invention, by depositing the Data Identification of timeout datum
The technological means into red black tree is stored up, so overcoming the prior art using the Data Identification of document data bank storage timeout datum
So as to cause acquisition from database the slower technical problem of data return times, and then reach improve obtain data place
Manage the technical effect of speed.
Above-mentioned specific embodiment, does not constitute a limitation on the scope of protection of the present invention.Those skilled in the art should be bright
It is white, design requirement and other factors are depended on, various modifications, combination, sub-portfolio and substitution can occur.It is any
Made modifications, equivalent substitutions and improvements etc. within the spirit and principles in the present invention, should be included in the scope of the present invention
Within.
Claims (8)
1. a kind of method for obtaining data, wherein the data have uniqueness Data Identification, and the data in the database
There is corresponding time-out time in principal and subordinate's data reproduction process, which is characterized in that the method includes executing following steps:
Receive the scheduling request for obtaining each data from the database；
According to the scheduling request, the attribute information of each data is stored in red black tree, wherein the attribute information packet
It includes: the time-out time and the Data Identification；
Judge whether the corresponding time-out time of the data exceeds preset threshold, and according to judging result to the database
Scheduling is executed to appoint.
2. the method according to claim 1, wherein further include:
Successively the attribute information of each data is saved to institute according to the increasing or decreasing sequence of the time-out time
It states on each node in red black tree.
3. the method according to claim 1, wherein further include:
If the time-out time is more than or equal to preset threshold, the Data Identification corresponding with the time-out time is deleted
It removes；
If the time-out time is less than the preset threshold, by the data according to the increasing or decreasing of the time-out time
Sequence executes scheduler task to the database, obtains the corresponding data of the Data Identification.
4. a kind of device for obtaining data, wherein the data have uniqueness Data Identification, and the data in the database
There is corresponding time-out time in principal and subordinate's data reproduction process, which is characterized in that described device includes:
Receiving module, for receiving the scheduling request for obtaining each data from the database；
Memory module, for the attribute information of each data being stored in red black tree, wherein institute according to the scheduling request
Stating attribute information includes: the time-out time and the Data Identification；
Execution module is tied for judging whether the corresponding time-out time of the data exceeds preset threshold, and according to judgement
Fruit executes scheduling to the database and appoints.
5. device according to claim 4, which is characterized in that the memory module is also used to:
Successively the attribute information of each data is saved to institute according to the increasing or decreasing sequence of the time-out time
It states on each node in red black tree.
6. device according to claim 4, which is characterized in that the execution module is also used to:
If the time-out time is more than or equal to preset threshold, the Data Identification corresponding with the time-out time is deleted
It removes；
If the time-out time is less than the preset threshold, by the data according to the increasing or decreasing of the time-out time
Sequence executes scheduler task to the database, obtains the corresponding data of the Data Identification.
7. a kind of electronic equipment for obtaining data characterized by comprising
One or more processors；
Storage device, for storing one or more programs,
When one or more of programs are executed by one or more of processors, so that one or more of processors are real
Now such as method as claimed in any one of claims 1-3.
8. a kind of computer-readable medium, is stored thereon with computer program, which is characterized in that described program is executed by processor
Shi Shixian method for example as claimed in any one of claims 1-3.
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Application publication date: 20190101 |