CN109783204A - A kind of distributed transaction processing method, device and storage medium - Google Patents
A kind of distributed transaction processing method, device and storage medium Download PDFInfo
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- CN109783204A CN109783204A CN201811652896.6A CN201811652896A CN109783204A CN 109783204 A CN109783204 A CN 109783204A CN 201811652896 A CN201811652896 A CN 201811652896A CN 109783204 A CN109783204 A CN 109783204A
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Abstract
The embodiment of the present invention provides a kind of distributed transaction processing method and device, wherein the method is applied to coordinate equipment, the coordination equipment executes equipment for managing at least one, which comprises receives at least one described first affairs for executing equipment executed in equipment and participates in request；The affairs participate in request for indicating the first execution equipment in the state for being able to carry out local matter to the coordination equipment；It receives the affairs that the first execution equipment is sent and submits request；Wherein, the affairs submit request that the local matter is completed for characterizing the first execution equipment；The affairs for executing equipment based on described first submit request, and Xiang Suoshu first executes equipment transmission affairs and submits instruction.
Description
Technical field
The present invention relates to backstage distributed systems, and in particular to a kind of distributed transaction processing method, device and storage are situated between
Matter.
Background technique
In a distributed system, in order to guarantee the High Availabitities of data, it will usually data be retained multiple copies, these copies
It can be placed on the machine of different physics.In the case where data have multiple copies, if network, server or software go out
Existing failure, will lead to part copy and is written successfully, the write-in failure of part copy.The data that this is resulted between each copy are different
It causes, data content conflict causes actual data inconsistent.
In order to solve the problems, such as this distributed consensus, it has been proposed that two-phase commitment protocol (Two- as shown in Figure 1
Phase Commit Protocol, 2PC) and three-phase commitment protocol as shown in Figure 2 (Three-Phase Commit
Protocol, 3PC), but all there is respective defect in both committing protocols.The synchronous obstruction of two-phase commitment protocol presence,
The problems such as Single Point of Faliure；And three-phase commitment protocol can have data inconsistence problems.
Summary of the invention
In view of this, the main purpose of the present invention is to provide a kind of distributed transaction processing method, device and storages to be situated between
Matter, the Transaction Blocking problem being able to solve in distributed system, guarantees the consistency of data.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of distributed transaction processing method of the embodiment of the present invention is applied to coordinate equipment, and the coordination equipment is used for
It manages at least one and executes equipment, which is characterized in that the described method includes:
It receives at least one described first affairs for executing equipment executed in equipment and participates in request；Wherein, the affairs
Request is participated in for indicating the first execution equipment in the state for being able to carry out local matter to the coordination equipment；
It receives the affairs that the first execution equipment is sent and submits request；Wherein, the affairs submit request for characterizing
The local matter is completed in the first execution equipment；
The affairs for executing equipment based on described first submit request, and Xiang Suoshu first executes equipment transmission affairs submission and refers to
It enables.
In the above scheme, it is described to it is described first execute equipment send affairs submit instruction before, the method is also wrapped
It includes:
After determining that receiving the affairs that described first executes equipment transmission submits request, the first execution equipment is held
Capable log relevant to local matter and lock information are stored in database table.
In the above scheme, the method also includes:
Detect whether that receiving the affairs that at least one described whole execution equipment executed in equipment are sent submits confirmation
Message；
If so, confirmation global transaction is completed；Based on the identifier of the global transaction, at least one described execution is set
Standby corresponding database is cleared up；Wherein, global transaction sheet as performed by the execution equipment of coordination equipment management
Ground affairs composition.
The embodiment of the present invention also provides a kind of distributed transaction processing method, is applied to first and executes equipment, feature exists
In, which comprises
Affairs participation request is sent to equipment is coordinated；Wherein, the affairs participate in request for referring to the coordination equipment
Show that the first execution equipment is in the state for being able to carry out local matter；The coordination equipment is for managing at least one execution
Equipment, it is described at least one execute equipment in comprising first execute equipment；
Local matter is executed, affairs submission is sent to the coordination equipment when completing the processing of the local matter and asks
It asks；Wherein, it is the first execution equipment before receiving affairs and participating in request that the local matter, which is the coordination equipment,
The affairs of distribution；Wherein, the affairs submit request that the local matter is completed for characterizing the first execution equipment；
When receiving the affairs submission instruction that the coordination equipment is sent, the local matter is submitted.
In the above scheme, after the submission local matter, the method also includes:
Confirmation message is sent to equipment is coordinated, the confirmation message is for notifying the local matter to have been filed on.
In the above scheme, after the submission local matter, the method also includes:
Release participates in the connection resource of the database of the local matter.
The present invention also provides a kind of distributing real time system device, described device includes: the first receiving module, the second reception
Module and the first sending module, wherein
First receiving module is joined for receiving at least one described first affairs for executing equipment executed in equipment
With request；Wherein, the affairs participate in request for being in and can hold to coordination equipment instruction the first execution equipment
The state of row local matter；
Second receiving module submits request for receiving the affairs that the first execution equipment is sent；Wherein, described
Affairs submit request that the local matter is completed for characterizing the first execution equipment；
First sending module, the affairs for executing equipment based on described first submit request, and Xiang Suoshu first is held
Row equipment sends affairs and submits instruction.
The present invention also provides a kind of distributing real time system device, described device includes: request module, execution module and mentions
Hand over module, wherein
The request module participates in request for sending affairs to coordination equipment；Wherein, the affairs participate in requesting to be used for
Indicate the first execution equipment in the state for being able to carry out local matter to the coordination equipment；The coordination equipment is used for
It manages at least one and executes equipment, include the first execution equipment at least one described execution equipment；
The execution module is set when completing the processing of the local matter to the coordination for executing local matter
Preparation send affairs to submit request；Wherein, the local matter is that the coordination equipment is before receiving affairs and participating in request
Described first executes the affairs of equipment distribution；Wherein, the affairs submit request complete for characterizing the first execution equipment
At the local matter；
The submission module, for submitting described when receiving the affairs submission instruction that the coordination equipment is sent
Ground affairs.
The present invention also provides a kind of computer readable storage mediums, are stored thereon with computer program, wherein the calculating
The either step of machine program method described above when being executed by processor.
The present invention also provides a kind of distributing real time system devices, comprising: processor and for store can be in processor
The memory of the computer program of upper operation, wherein the processor is for executing above-mentioned institute when running the computer program
State the either step of method.
Distributed transaction processing method and device provided in an embodiment of the present invention, by each execution equipment respectively parallel to
Coordinate equipment and submit participation request, and the respectively autonomous mode for executing local task, waits other execution equipment without synchronous
It is confirmed whether that the receipt of affairs can be participated in, improves the efficiency of distributed transaction execution；Local has been executed in each execution equipment
It after affairs, is managed by coordination equipment is unified, executes and submit or rollback, the obstruction in very good solution distributed transaction is asked
Topic.Also, since distributed transaction processing method provided in an embodiment of the present invention uses local matter in global transaction submission
The mode with the cleaning of global transaction identifier is submitted, the data consistency of distributed transaction can be improved, reach distributed transaction
Maximum performance.
Detailed description of the invention
Fig. 1 is the information exchange figure of the distributed transaction processing method of two-phase commitment protocol；
Fig. 2 is the information exchange figure of the distributed transaction processing method of three-phase commitment protocol；
Fig. 3 is a kind of application scenarios of the embodiment of the present invention；
Fig. 4 is a kind of flow chart of distributed transaction processing method provided in an embodiment of the present invention；
Fig. 5 is the flow chart of another distributed transaction processing method provided in an embodiment of the present invention；
Fig. 6 is the interaction schematic diagram between coordination equipment provided in an embodiment of the present invention and execution equipment；
Fig. 7 is the structural schematic diagram one of distributing real time system device provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram two of distributing real time system device provided in an embodiment of the present invention；
Fig. 9 is a kind of hardware structural diagram of distributing real time system device of the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the specific technical solution of invention is described in further detail.The following examples are intended to illustrate the invention, but does not have to
To limit the scope of the invention.
Before embodiments of the present invention are described, the background context of distributed transaction is first learnt about in detail.
Distributed transaction refers to that primary big operation is made of different small operations, these small operations are distributed in different
On server, and belong to different applications, distributed transaction needs to guarantee these small operations or all success or all loses
It loses.Basically, distributed transaction is exactly the data consistency in order to guarantee disparate databases.But different small operation
It is executed by different nodes, and can not accurately know the affairs executive condition of other nodes between mutually independent node.For
Guarantee the data consistency in distributed system, the key of distributing real time system is that there must be a kind of method to be known that thing
Be engaged in the everything that is anywhere done, submit or decisions of rollback affairs must generate unified result (all submission or
Whole rollbacks).So conventional solution is exactly to introduce the component of one " coordinator " to carry out all distributed sections of United Dispatching
The execution of point.
In application scenarios shown in Fig. 3, when task comes interim, application system (AP, Application), i.e. business system
Delineation of activities can be multiple branch's affairs according to the concrete condition of business by system, and multiple branch's affairs of division are sent to
Task manager (TM, Transaction Manager), i.e. coordination equipment.Here, the operation system AP is by the multiple of division
Branch's affairs, which are sent to, coordinates equipment TM, realizes particular by the operation interface TX of distributed transaction is called.
Coordinate equipment TM after receiving above-mentioned multiple branch's affairs, multiple branches are parsed, determine each branch
Process object and corresponding resource, and accorded with to affairs allocation identification；After determining each branch's business, pass through resource manager
The operation interface XA that (RM, Resource Manager) is provided carrys out each resource manager RM of United Dispatching, i.e. execution equipment, with reality
Existing distributed transaction.Here, resource manager RM is usually database, is also possible to other resource managers, such as message team
It arranges (such as JMS data source).
It should be noted that then passing through the local interface of RM offer between operation system AP and execution equipment RM in Fig. 3
(Native API) carries out resources control；Here, local interface does not carry out the agreement of interface specification, be currently each manufacturer from
Oneself realizes the resources control of oneself.
Realize that the current of distributed transaction has two-phase commitment protocol, three-phase commitment protocol by XA interface specification.?
Find that two-stage submission has the problems such as synchronous obstruction, Single Point of Faliure and data are inconsistent in practice, and three stages submitted and solve
It has determined Single Point of Faliure problem, and obstruction can be reduced, once but since its interaction mechanism receive participant can not in time
After information from coordinator, it, which can default, executes submission (commit), without holding transaction resource always and in resistance
Plug-like state；On the one hand this mechanism can significantly reduce obstructing problem, but also result in Data Consistency: due to
Network cause, termination (abort) response for coordinating equipment TM transmission are not performed equipment RM in time and receive, set then executing
Standby RM performs submission (commit) operation after waiting time-out.Termination (abort) order thus is connected to other and is held
There is a situation where that data are inconsistent between the execution equipment RM of row rollback.
Based on this, the embodiment of the present invention provides a kind of distributed transaction processing method, is applied to coordinate equipment, the association
Equipment is adjusted to execute equipment for managing at least one, as shown in figure 4, this method comprises:
S101 receives at least one described first affairs for executing equipment executed in equipment and participates in request；Wherein, described
Affairs participate in request for indicating the first execution equipment in the state for being able to carry out local matter to the coordination equipment；
S102 receives the affairs that the first execution equipment is sent and submits request；Wherein, the affairs submit request to be used for
It characterizes the first execution equipment and the local matter is completed；
S103, the affairs for executing equipment based on described first submit request, and Xiang Suoshu first executes equipment transmission affairs and mentions
Interdigital order.
Here, the coordination equipment TM is executed and is set for all distributed nodes of United Dispatching in distributed system
The equipment that standby RM executes task, the determination for coordinating equipment TM can be and determine by the sequence of the execution of business, i.e., and first
The executor of business is to coordinate equipment TM, is also possible to be chosen according to the interrelated relationship between subservice each in business
The most execution equipment of incidence relation is to coordinate equipment TM, and certainly, the determination for coordinating equipment TM herein is also possible to other determinations
Mode.
The execution equipment RM is the equipment that local matter is executed in distributed system.In a distributed system, one
As only one coordinate equipment TM, but have multiple execution equipment RM." first ", " second " etc. are only used for distinguishing description, and
It cannot be understood as indicating or implying relative importance.
In step s101, coordinate the affairs for the first execution equipment that equipment TM is received at least one described execution equipment
Participate in request, specifically include: when business is come temporarily, delineation of activities is multiple points according to the concrete condition of business by operation system AP
Branch affairs, and multiple branch's affairs of division are sent to and coordinate equipment TM, coordinate equipment TM according to each branch's affairs situation, leads to
It crosses the registration of XA interface and executes equipment RM, that is, register the execution equipment RM of this business needs.Here, when the execution equipment being registered
It is described in the execution equipment RM for being able to carry out local matter state when some is in the state for being able to carry out local matter in RM
Actively to coordinate equipment TM send affairs participate in request, and coordinate equipment TM receive it is described first execution equipment affairs participation ask
It asks.
In step s 102, the affairs that the coordination equipment TM receives that the first execution equipment is sent submit request；This
In, the affairs submit request that the local matter is completed for characterizing the first execution equipment；
In step s 103, after coordinating equipment TM and receiving affairs submission request, the coordination equipment TM is based on described
First affairs for executing equipment submit request, and Xiang Suoshu first executes equipment transmission affairs and submits instruction, start formal submission
Process.
Here, before coordination equipment TM executes equipment transmission affairs submission instruction to described first, the distributed transaction
Processing method further include:
After determining that receiving the affairs that described first executes equipment transmission submits request, the first execution equipment is held
Capable log relevant to local matter and lock information are stored in database table.
Here, coordinate the affairs submission request that equipment TM receives the transmission of the first execution equipment, just execute and set by described first
The standby correlation log information for executing local task and lock information are stored.
It should be noted that the log information includes the undo log and redo log of local matter；The lock information
Refer to before the submission of affairs, lock resource.The undo log is for storing the value before data modification；It is redo days described
Will, for the data after record modification, journal.
It should also be noted that, generally, Relational DBMS is made of two files, a data
Library file and a journal file.Log is all first write when database carries out any write operation；Executing affairs
When, database will record down the local redo log of this affairs, i.e. data after record modification first, then just start
Real operating database；Disk can be written in journal file first before the procedure.So when unexpected power-off, even if behaviour
It does not complete, when restarting database, database can carry out undo rollback either according to the case where current data
It is rolled before redo, ensures that the strong consistency of data in this way.
When database makes an amendment data, data page is needed to read buffer zone (Buffer from disk
Pool in), the buffer zone is used to data cached and is indexed to memory, can be used to accelerate the read-write of data.In data page
After buffer zone is read from disk, if carrying out the modification of data in buffer zone, the data page in buffer zone is just
Inconsistent with the data page content on disk, the data page of buffer zone is known as containing dirty pages (dirty page) at this time.If this
When improper database service occur restart, then these data are not synchronized in disk file, that is, can send out
Raw loss of data.If this when, there can be a file, after the dirty page change in buffer zone,
Corresponding modification record is recorded in redo journal file, then after database service is collapsed, restore database when
It waits, disk file can be re-applied to, data are consistent according to the record content of redo journal file.
Further, in the distributed transaction processing method of the present embodiment, further includes:
Detect whether that receiving the affairs that at least one described whole execution equipment executed in equipment are sent submits confirmation
Message；
If so, confirmation global transaction is completed；Based on the identifier of the global transaction, at least one described execution is set
Standby corresponding database is cleared up；Wherein, global transaction sheet as performed by the execution equipment of coordination equipment management
Ground affairs composition；
Here, it should be noted that submit instruction according to the affairs that equipment is sent are coordinated when executing equipment, execute local appoint
The submission of business returns to confirmation (ACK) response to equipment is coordinated if the coordination equipment successfully performs submission operation,
The confirmation response correctly submits affairs for characterizing the execution equipment.
So, when coordination equipment, which receives the affairs that all execution equipment are sent, submits confirmation message, overall situation thing is indicated
Business is completed.At this moment, the identifier based on the global transaction carries out database corresponding at least one described execution equipment
Cleaning discharges total data base resource.
Here, unification is all assigned with to each subtransaction that entire affairs are related to due to when affairs are distributed, coordinating equipment
Identifier needs to discharge this occupied database resource of global transaction treatment process after affairs submission, with
Just this accessible database of other affairs.
As an example, when user A buys a commodity, the payment data library of user A, commodity information database are equal
It can update, when carrying out submitting operation, need to lock the database of operation, " user A buys a quotient to prevent
Other affairs except this affairs of product " operate above-mentioned commodity information database, whole " user A buys a commodity "
After the completion of a task is submitted, to the resource in Relational database such as payment data library, commodity information database that the affairs are related to
It is discharged, so as to this accessible payment data of other affairs (such as: " user B buy a commodity " this affairs)
Library, commodity information database.
In an alternative embodiment of the invention, after above-mentioned steps S103, the method may include:
Judge whether there is the execution equipment that local matter executes failure, and if it exists, hold to the relevant whole of global transaction
Row equipment sends rollback instruction；Wherein, global transaction local matter as performed by the execution equipment of coordination equipment management
Composition；
Here, when coordination equipment does not receive the submission request that a certain execution equipment is sent within a preset time, then it is assumed that
The a certain execution equipment local matter executes failure.When there are the execution equipment that local matter executes failure, the coordination
Equipment can send rollback instruction to the relevant equipment that all executes of global transaction；I.e. one execution equipment local task execution is lost
It loses, then whole execution equipment all carries out the rolling back action of data.
In another alternative embodiment of the invention, after above-mentioned steps S103, the method can also include:
Judge whether there is the second execution equipment that local matter executes failure, and if it exists, then execute and set to described second
Preparation sends rolling instruction back to.
Here, when only second, which executes equipment, executes local matter execution failure, coordinate equipment and only held to described second
Row equipment sends rollback instruction；
It cannot mistake to the number that the second execution equipment sends rollback instruction it should be noted that coordinating equipment herein
It is more, when be performed a plurality of times rolling back action it is also failed when, the coordination equipment to global transaction it is relevant all execute equipment send
Rollback instruction.Here, since the limitation of many affairs having time in operation will affect global thing when rollback number is excessive
The efficiency that business is submitted, the number that transmission rollback instruction can be set is no more than 3 times or the limit of other modes progress number
It is fixed.
For the content of clearer expression the present embodiment, it is illustrated here in conjunction with concrete application situation, with following industry
For business demand:
Transferred account service, account A transfers accounts 1000 yuan to account B, and during transferring accounts, account A, B all submits 10 to account C
The service charge of member.So this time distributed transaction can be divided into 6 branch's affairs, it may be assumed that " A-1000 ", " B+1000 ", " A-
10","B-10","C+10","C+10"；Before carrying out the present embodiment distributing real time system, operation system can be by division
6 branch's affairs, which are sent to, coordinates equipment TM, coordinates equipment TM according to the object and money of 6 branch's issued transactions
Source determines processing mode and dependence to resource, is set by 6 execution that XA interface registers this distributed transaction needs
Standby RM, notifies the RM to open the operation of each database.
When this 6, which execute some in equipment RM, is in the state for being able to carry out local matter, for example, executing " A-10 " behaviour
The execution equipment RM of work is in the state for being able to carry out affairs, at this point, the first step of the present embodiment distributing real time system is: institute
The affairs participation request for coordinating the execution equipment RM that equipment TM can receive " A-10 " operation is stated, operates and completes at its " A-10 "
Afterwards, the affairs submission request that the execution equipment of " A-10 " operation is sent can be received by coordinating equipment TM；At this moment, coordinate equipment TM meeting
It is requested based on the submission, the execution equipment operated to " A-10 " sends affairs and submits instruction.
Here, the determination can be the existing elder generation found out between affairs to the processing mode and dependence of resource
Afterwards can be with parallel processing between sequence or affairs the case where.Such as when " A-1000 " and " A-10 " can be with parallel processings.
Distributed transaction processing method provided in an embodiment of the present invention, the affairs that execution equipment is received by coordinating equipment are joined
It submits and requests with request, affairs, judge the successful execution for executing equipment local task, and then send affairs to equipment is executed
Submit instruction.Due to without waiting for the order for coordinating equipment, greatly improving the efficiency of execution, simultaneously after task is distributed
Rollback permission can be modified due to coordinating equipment, takes the initiative the mode of rollback to the execution equipment for executing mistake, guarantees to get over
The atomicity of business.
The embodiment of the present invention provides another distributed transaction processing method, is applied to first and executes equipment, such as Fig. 5 institute
Show, which comprises
S201 sends affairs participation request to equipment is coordinated；Wherein, the affairs participate in request for setting to the coordination
It is standby to indicate that the first execution equipment is in the state for being able to carry out local matter；The coordination equipment is for managing at least one
Equipment is executed, includes the first execution equipment at least one described execution equipment；
S202 executes local matter, sends affairs to the coordination equipment when completing the processing of the local matter and mentions
Hand over request；Wherein, it is first execution before receiving affairs and participating in request that the local matter, which is the coordination equipment,
The affairs of equipment distribution；Wherein, the affairs submit request that the local thing is completed for characterizing the first execution equipment
Business；
S203 submits the local matter when receiving the affairs submission instruction that the coordination equipment is sent.
In step s 201, when business is come temporarily, delineation of activities is more according to the concrete condition of business by operation system AP
A branch's affairs, and multiple branch's affairs of division are sent to and coordinate equipment TM, coordinate equipment TM according to each branch's affairs feelings
Condition is registered by XA interface and executes equipment RM, that is, registers the execution equipment RM of this business needs.Here, when what is be registered holds
It is described in the execution for being able to carry out local matter state when some is in the state for being able to carry out local matter in row equipment RM
Equipment RM actively sends affairs to coordination equipment TM and participates in request.
Here, the coordination equipment TM is to execute task for all RM for participating in affairs of United Dispatching in distributed system
Equipment, the execution equipment RM is the equipment that local matter is executed in distributed system, there is multiple execution equipment RM, it is above-mentioned extremely
Equipment is executed comprising first in few execution equipment；
In step S202, after the first execution equipment sends affairs participation request to coordination equipment TM, start execution certainly
Branch's affairs that oneself is assigned, i.e. local matter initiate affairs submission request to equipment TM is coordinated after the completion of local matter；
Here, the affairs submit request that the local matter is completed for characterizing the first execution equipment；
Here, when the first execution equipment executes local matter, the method also includes:
Store local log information.
The local log information includes the undo log and redo log of local matter；The undo log is for storing
Value before data modification；The redo log, for the data after record modification, journal.
It should be noted that first execute equipment execute local matter when, i.e., operating database when, first
It will record down the local redo log of this affairs, i.e. data after record modification, then just start real operating database；?
Disk can be written in journal file first before operation.So when unexpected power-off, even if operation is not completed, again
When log-on data library, database can thus be protected according to rolling before carrying out undo rollback either redo the case where current data
The strong consistency of data is demonstrate,proved.
In step S203, when receiving the affairs submission instruction that the coordination equipment is sent, the local thing is submitted
Business.
After submitting the local matter, the method also includes:
Confirmation message is sent to equipment is coordinated, the confirmation message is for notifying the local matter to have been filed on.
Here, instruction is submitted according to the affairs that equipment is sent are coordinated when the first execution equipment, successfully performs local thing
After the submission of business, confirmation (ACK) response can be returned to equipment is coordinated, the confirmation response executes equipment for characterizing described first
Correctly submit affairs.
After the submission local matter, the method also includes:
Release participates in the connection resource of the database of the local matter.
Here, due to being locked to database resource when operating to database, other affairs cannot be accessed
Database resource, then needing to release the occupied database resource of this local matter after the submission of local task
It puts, so as to this accessible database of other affairs.
As a kind of optional embodiment, the distributed transaction processing method is after submitting local matter, the side
Method further include:
It receives and coordinates the data rewind instruction that equipment is sent, execute data rewind.
Here, particularly directed to there is a situation where that local matter is not carried out successfully, the coordination equipment can send data and return
Rolling instruction, data rewind instructs based on the received, executes data rewind.
For the content of clearer expression the present embodiment, it is illustrated here in conjunction with concrete application situation, with following industry
For business demand:
Transferred account service, account A transfers accounts 1000 yuan to account B, and during transferring accounts, account A, B all submits 10 to account C
The service charge of member.So this time distributed transaction can be divided into 6 branch's affairs, it may be assumed that " A-1000 ", " B+1000 ", " A-
10","B-10","C+10","C+10"；Before carrying out the present embodiment distributing real time system, operation system can be by division
6 branch's affairs, which are sent to, coordinates equipment TM, coordinates equipment TM according to the object and money of 6 branch's issued transactions
Source determines processing mode and dependence to resource, is set by 6 execution that XA interface registers this distributed transaction needs
Standby RM, notifies the RM to open the operation of each database.
When this 6, which execute some in equipment RM, is in the state for being able to carry out local matter, for example, executing " A-10 " behaviour
The execution equipment RM of work is in the state for being able to carry out affairs, at this point, the first step of the present embodiment distributing real time system is: holding
The execution equipment RM of row " A-10 " operation voluntarily sends affairs to coordination equipment TM and participates in request, and voluntarily executes local task,
Execute " A-10 " operation；After completion " A-10 " operation, the submission request that " A-10 " is operated is sent to the coordination equipment TM；
When last basis receives the affairs submission instruction that coordination equipment is sent, the local matter " A-10 " is submitted to operate.
Distributed transaction processing method provided in an embodiment of the present invention, by each execution equipment respectively parallel to coordination equipment
It submits and participates in request, and the respective autonomous mode for executing local task, the affairs participant confirmation all without synchronous waiting is
The no receipt that can participate in affairs, the obstructing problem in very good solution distributed transaction.After the completion of respective local task,
Initiation task submits request, and according to submitting instruction to submit the local matter, is able to achieve discharging rapidly for database resource.
Fig. 6 is to realize distributed transaction processing method between coordination equipment provided in an embodiment of the present invention and execution equipment
Interaction schematic diagram, in Fig. 6, the transaction coordination person TM, which refers to, coordinates equipment TM, it is to adjust in distributed system for unified
All equipment for executing equipment are spent, the affairs participant, which refers to, executes equipment RM, in a distributed transaction, only one
Coordinate equipment TM, but there are multiple affairs participants, i.e., multiple execution equipment RM.The distributed transaction processing method includes:
S301, first, which executes equipment, sends affairs participation request to equipment is coordinated；Wherein, the affairs participate in requesting to be used for
Indicate the first execution equipment in the state for being able to carry out local matter to the coordination equipment；The coordination equipment is used for
It manages at least one and executes equipment, include the first execution equipment at least one described execution equipment；
S302, the affairs participation for coordinating the first execution equipment at least one described execution equipment of equipment reception are asked
It asks；Wherein, the affairs participate in request and are able to carry out this for being in coordination equipment instruction the first execution equipment
The state of ground affairs；
S303, described first, which executes equipment, executes local matter, when completing the processing of the local matter to the association
It adjusts equipment to send affairs and submits request；Wherein, the local matter is that the coordination equipment is receiving affairs participation request
The preceding affairs that equipment distribution is executed for described first；Wherein, the affairs submit request to execute equipment for characterizing described first
The local matter is completed；
S304, the equipment of coordinating receive the affairs submission request that the first execution equipment is sent；Wherein, the affairs
Submit request that the local matter is completed for characterizing the first execution equipment；
S305, the affairs for executing equipment based on described first submit request, and the coordination equipment is executed to described first and set
Preparation send affairs to submit instruction.
S306 submits institute when the first execution equipment, which receives the affairs that the coordination equipment is sent, submits instruction
State local matter.
Here, in step S303, when the first execution equipment executes local matter, local log information can be stored.
Before step S305, the equipment of coordinating is determining that receiving the affairs submission that the first execution equipment is sent asks
After asking, log relevant to local matter performed by the first execution equipment and lock information are stored in database table.
The local log information includes the undo log and redo log of local matter；The undo log is for storing data modification
Preceding value；The redo log, for the data after record modification, journal.Here, the relevant log of storage local matter
It is in order in emergency situations, database can be according to undo rollback either redo be carried out the case where current data before with lock information
Rolling, it is ensured that the strong consistency of data.
After step S306, the method also includes: the coordination equipment judges whether there is local matter and executes mistake
The execution equipment lost, and if it exists, send rollback instruction to the relevant equipment that all executes of global transaction；
It here, further include another implementation method, i.e., the described coordination equipment judges whether there is local matter and executes failure
Second execute equipment, and if it exists, then to it is described second execute equipment send rollback instruction.
After described first executes the equipment submission local matter, described first, which executes equipment, to send to equipment is coordinated
Confirmation message, the confirmation message is for notifying the local matter to have been filed on；The coordination equipment detects whether to receive institute
It states at least one and executes whole affairs submission confirmation messages for executing equipment and sending in equipment；If so, confirmation global transaction
It completes；Based on the identifier of the global transaction, the coordination equipment is to data corresponding at least one described execution equipment
Library is cleared up；The first execution equipment can discharge the connection resource for participating in the database of the local matter.Wherein, described
Local matter performed by execution equipment of the global transaction by coordination equipment management forms；
For the content of clearer expression the present embodiment, it is illustrated here in conjunction with concrete application situation, with following industry
For business demand:
Transferred account service, account A transfers accounts 1000 yuan to account B, and during transferring accounts, account A, B all submits 10 to account C
The service charge of member.So this time distributed transaction can be divided into 6 branch's affairs, it may be assumed that " A-1000 ", " B+1000 ", " A-
10","B-10","C+10","C+10"；Before carrying out the present embodiment distributing real time system, operation system can be by division
6 branch's affairs, which are sent to, coordinates equipment TM, coordinates equipment TM according to the object and money of 6 branch's issued transactions
Source determines processing mode and dependence to resource, is set by 6 execution that XA interface registers this distributed transaction needs
Standby RM, notifies the RM to open the operation of each database.
When this 6, which execute some in equipment RM, is in the state for being able to carry out local matter, for example, executing " A-10 " behaviour
The execution equipment RM of work is in the state for being able to carry out affairs, at this point, the first step of the present embodiment distributing real time system is: holding
The execution equipment RM of row " A-10 " operation voluntarily sends affairs to coordination equipment TM and participates in request, and voluntarily executes local task；
The affairs that the coordination equipment TM can receive the execution equipment RM of " A-10 " operation participate in request, complete executing equipment RM
After " A-10 " operation, the affairs that the execution equipment that the coordination equipment TM can receive " A-10 " operation is sent submit request, into
And requested based on the submission, coordinating the execution equipment RM that equipment TM is operated to " A-10 " sends affairs submission instruction, and execution is set
Standby RM according to receive coordinate the affairs that equipment TM is sent and submit instruction when, submit the local matter " A-10 " operation.
Distributed transaction processing method provided in an embodiment of the present invention, by each execution equipment respectively parallel to coordination equipment
It submits and participates in request, and the respective autonomous mode for executing local task, the affairs participant confirmation all without synchronous waiting is
The no receipt that can participate in affairs, the obstructing problem in very good solution distributed transaction.It has been executed in each execution equipment
After ground affairs, is finally managed by coordination equipment TM is unified, execute submission or rollback；Rollback power can be modified due to coordinating equipment
Limit takes the initiative the mode of rollback to the execution equipment for executing mistake, ensure that the atomicity of affairs.Also, due to the present invention
The distributed transaction processing method that embodiment provides is based on XA model, can put a variety of moneys such as support database just, message queue
Source manager RM.In data consistency, since distributed transaction processing method provided in an embodiment of the present invention is in global transaction
In submission in two steps, in such a way that local matter is submitted and global transaction identifier is cleared up, it can achieve distributed transaction
Maximum performance.
Based on the identical technical concept of previous embodiment, the embodiment of the present invention provides a kind of distributing real time system device
400, as shown in fig. 7, described device includes: the first receiving module 401, the second receiving module 402 and the first sending module 403,
Wherein,
First receiving module 401, for receiving at least one described execution equipment first thing for executing equipment
Business participates in request；Wherein, the affairs participate in request for being in energy to coordination equipment instruction the first execution equipment
Enough execute the state of local matter；
Second receiving module 402 submits request for receiving the affairs that the first execution equipment is sent；Wherein,
The affairs submit request that the local matter is completed for characterizing the first execution equipment；
First sending module 403, the affairs for executing equipment based on described first submit request, Xiang Suoshu first
It executes equipment and sends affairs submission instruction.
Wherein, first sending module 403 is also used to determining that receiving the affairs that the first execution equipment is sent mentions
After handing over request, log relevant to local matter performed by the first execution equipment and lock information are stored in database table
In.
Further, described device 400 further include: detection module, the detection module, for detecting whether receiving institute
It states at least one and executes whole affairs submission confirmation messages for executing equipment and sending in equipment；If so, confirmation global transaction
It completes；Based on the identifier of the global transaction, database corresponding at least one described execution equipment is cleared up；Its
In, local matter performed by execution equipment of the global transaction by coordination equipment management forms.
Described device 400 further include: first judgment module: the first judgment module, for judging whether there is local
Affairs execute the execution equipment of failure, and if it exists, send rollback instruction to the relevant equipment that all executes of global transaction；
Described device 400 further include: the second judgment module: second judgment module, for judging whether there is local
Affairs execute the second execution equipment of failure, and if it exists, then execute equipment to described second and send rollback instruction.
It should be noted that the principle and aforementioned applications that are solved the problems, such as due to the distributing real time system device 400 in
The distributed transaction processing method for coordinating equipment is similar, therefore, the specific implementation process of the distributing real time system equipment 400
And implementation principle may refer to the description of preceding method and implementation process and implementation principle, overlaps will not be repeated.
Distributing real time system device provided in an embodiment of the present invention, requested by the affairs participation that reception executes equipment,
Affairs submit request, judge the successful execution for executing equipment local task, and then refer to equipment transmission affairs submission is executed
It enables.Due to without waiting for the order for coordinating equipment, greatly improving the efficiency of execution after task is distributed, simultaneously because association
It adjusts equipment that can modify rollback permission, takes the initiative the mode of rollback to the execution equipment for executing mistake, ensure that the original of affairs
Sub- property.
Based on the identical technical concept of previous embodiment, the embodiment of the present invention provides another distributing real time system device
500, as shown in figure 8, described device includes: request module 501, execution module 502 and submission module 503, wherein
The request module 501 participates in request for sending affairs to coordination equipment；Wherein, the affairs participate in request
For indicating the first execution equipment in the state for being able to carry out local matter to the coordination equipment；The coordination equipment
Equipment is executed for managing at least one, includes the first execution equipment at least one described execution equipment；
The execution module 502, for executing local matter, when completing the processing of the local matter to the coordination
Equipment sends affairs and submits request；Wherein, the local matter is the coordination equipment before receiving affairs and participating in request
The affairs for executing equipment distribution for described first；Wherein, the affairs submit request to execute equipment for characterizing described first
Complete the local matter；
The submission module 503, for when receiving the affairs sent of coordination equipment and submitting instruction, described in submission
Local matter.
Wherein, the execution module 502, is also used to store local log information.
Described device 500 further include: the second sending module, second sending module, for true to equipment transmission is coordinated
Recognize message, the confirmation message is for notifying the local matter to have been filed on.
Described device 500 further include: release module, the release module, for discharging the number for participating in the local matter
According to the connection resource in library.
Described device 500 further include: third receiving module, the third receiving module are sent for receiving coordination equipment
Data rewind instruction, execute data rewind.
It should be noted that the principle and aforementioned applications that are solved the problems, such as due to the distributing real time system device 500 in
The distributed transaction processing method of first execution equipment is similar, therefore, the specific implementation of the distributing real time system equipment 500
Process and implementation principle may refer to the description of preceding method and implementation process and implementation principle, and it is no longer superfluous to repeat place
It states.
Distributing real time system device provided in an embodiment of the present invention, by each execution equipment respectively parallel to coordination equipment
It submits and participates in request, and the respective autonomous mode for executing local task, the affairs participant confirmation all without synchronous waiting is
The no receipt that can participate in affairs, the obstructing problem in very good solution distributed transaction.After the completion of respective local task,
Initiation task submits request, and according to submitting instruction to submit the local matter, is able to achieve discharging rapidly for database resource.
The embodiment of the present invention also provides a kind of computer readable storage medium, is stored thereon with computer program, the meter
The step of above method embodiment is realized when calculation machine program processor is executed by processor, and storage medium above-mentioned includes: to move
Dynamic storage equipment, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access
Memory), the various media that can store program code such as magnetic or disk.
The embodiment of the present invention also provides a kind of distributing real time system device, comprising: processor and can be for storing
The memory of the computer program run on processor, wherein the processor is for executing when running the computer program
The step of above method embodiment stored in memory.
Fig. 9 is a kind of hardware structural diagram of distributing real time system device of the embodiment of the present invention, the distributed transaction
Processing unit 600 includes: at least one processor 601, memory 602, the various components in distributing real time system device 600
It is coupled by bus system 603, it is appreciated that bus system 603 is for realizing the connection communication between these components.Always
Linear system system 603 further includes power bus, control bus and status signal bus in addition in addition to including data/address bus.But in order to clear
For the sake of Chu's explanation, various buses are all designated as bus system 603 in Fig. 9.
It is appreciated that memory 602 can be volatile memory or nonvolatile memory, may also comprise volatibility and
Both nonvolatile memories.Wherein, nonvolatile memory can be read-only memory (ROM, Read Only Memory),
Programmable read only memory (PROM, Programmable Read-Only Memory), Erasable Programmable Read Only Memory EPROM
(EPROM, Erasable Programmable Read-Only Memory), electrically erasable programmable read-only memory
The storage of (EEPROM, Electrically Erasable Programmable Read-Only Memory), magnetic random access
Device (FRAM, ferromagnetic random access memory), flash memory (Flash Memory), magnetic surface are deposited
Reservoir, CD or CD-ROM (CD-ROM, Compact Disc Read-Only Memory)；Magnetic surface storage can be
Magnetic disk storage or magnetic tape storage.Volatile memory can be random access memory (RAM, Random Access
Memory), it is used as External Cache.By exemplary but be not restricted explanation, the RAM of many forms is available, such as
Static random access memory (SRAM, Static Random Access Memory), synchronous static random access memory
(SSRAM, Synchronous Static Random Access Memory), dynamic random access memory (DRAM,
Dynamic Random Access Memory), Synchronous Dynamic Random Access Memory (SDRAM, Synchronous
Dynamic Random Access Memory), double data speed synchronous dynamic RAM (DDRSDRAM,
Double Data Rate Synchronous Dynamic Random Access Memory), enhanced synchronous dynamic random
Access memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), synchronized links
Dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), direct rambus
Random access memory (DRRAM, Direct Rambus Random Access Memory).Description of the embodiment of the present invention is deposited
Reservoir 602 is intended to include but is not limited to the memory of these and any other suitable type.
Memory 602 in the embodiment of the present invention is for storing various types of data to support distributing real time system to fill
Set 600 operation.The example of these data includes: any computer for operating on distributing real time system device 600
Program, such as local log information, the data rewind instruction of storage, realize that the program of present invention method may be embodied in
In memory 602.
The method that the embodiments of the present invention disclose can be applied in processor 601, or be realized by processor 601.
Processor may be a kind of IC chip, the processing capacity with signal.During realization, each step of the above method
It can be completed by the integrated logic circuit of the hardware in processor or the instruction of software form.Above-mentioned processor can be
General processor, digital signal processor (DSP, Digital Signal Processor) or other programmable logic devices
Part, discrete gate or transistor logic, discrete hardware components etc..Processor may be implemented or execute the embodiment of the present invention
In disclosed each method, step and logic diagram.General processor can be microprocessor or any conventional processor
Deng.The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in hardware decoding processor and execute completion, or
Hardware and software module combination in person's decoding processor execute completion.Software module can be located in storage medium, this is deposited
The step of storage media is located at memory, and processor reads the information in memory, completes preceding method in conjunction with its hardware.
In the exemplary embodiment, distributing real time system device 600 can be by the dedicated integrated electricity of one or more application
Road (ASIC, Application Specific Integrated Circuit), DSP, programmable logic device (PLD,
Programmable Logic Device), Complex Programmable Logic Devices (CPLD, Complex Programmable Logic
Device), field programmable gate array (FPGA, Field-Programmable Gate Array), general processor, control
Device, microcontroller (MCU, Micro Controller Unit), microprocessor (Microprocessor) or other electronics member
Part is realized, for executing the above method.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.Apparatus embodiments described above are merely indicative, for example, the division of the unit, only
A kind of logical function partition, there may be another division manner in actual implementation, such as: multiple units or components can combine, or
It is desirably integrated into another system, or some features can be ignored or not executed.In addition, shown or discussed each composition portion
Mutual coupling or direct-coupling or communication connection is divided to can be through some interfaces, the INDIRECT COUPLING of equipment or unit
Or communication connection, it can be electrical, mechanical or other forms.
Above-mentioned unit as illustrated by the separation member, which can be or may not be, to be physically separated, aobvious as unit
The component shown can be or may not be physical unit, it can and it is in one place, it may be distributed over multiple network lists
In member；Some or all of units can be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In addition, each functional unit in various embodiments of the present invention can be fully integrated in one processing unit, it can also
To be each unit individually as a unit, can also be integrated in one unit with two or more units；It is above-mentioned
Integrated unit both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned include: movable storage device, it is read-only
Memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or
The various media that can store program code such as person's CD.
If alternatively, the above-mentioned integrated unit of the present invention is realized in the form of software function module and as independent product
When selling or using, it also can store in a computer readable storage medium.Based on this understanding, the present invention is implemented
Substantially the part that contributes to existing technology can be embodied in the form of software products the technical solution of example in other words,
The computer software product is stored in a storage medium, including some instructions are used so that computer equipment (can be with
It is personal computer, server or network equipment etc.) execute all or part of each embodiment the method for the present invention.
And storage medium above-mentioned includes: that movable storage device, ROM, RAM, magnetic or disk etc. are various can store program code
Medium.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of distributed transaction processing method is applied to coordinate equipment, the coordination equipment is for managing at least one execution
Equipment, which is characterized in that the described method includes:
It receives at least one described first affairs for executing equipment executed in equipment and participates in request；Wherein, the affairs participate in
It requests for indicating the first execution equipment in the state for being able to carry out local matter to the coordination equipment；
It receives the affairs that the first execution equipment is sent and submits request；Wherein, the affairs submit request described for characterizing
The local matter is completed in first execution equipment；
The affairs for executing equipment based on described first submit request, and Xiang Suoshu first executes equipment transmission affairs and submits instruction.
2. the method according to claim 1, wherein described refer to the first execution equipment transmission affairs submission
Before order, the method also includes:
After determining that receiving the affairs that described first executes equipment transmission submits request, described first is executed performed by equipment
Log relevant to local matter and lock information are stored in database table.
3. the method according to claim 1, wherein the method also includes:
Detect whether that receiving the affairs that at least one described whole execution equipment executed in equipment are sent submits confirmation messages；
If so, confirmation global transaction is completed；Based on the identifier of the global transaction, at least one described execution equipment institute
Corresponding database is cleared up；Wherein, the global transaction local thing as performed by the execution equipment of coordination equipment management
Business composition.
4. a kind of distributed transaction processing method is applied to first and executes equipment, which is characterized in that the described method includes:
Affairs participation request is sent to equipment is coordinated；Wherein, the affairs participate in request for indicating institute to the coordination equipment
It states the first execution equipment and is in the state for being able to carry out local matter；The coordination equipment is set for managing at least one execution
It is standby, equipment is executed comprising first at least one described execution equipment；
Local matter is executed, affairs is sent to the coordination equipment when completing the processing of the local matter and submits request；Its
In, the local matter is that the coordination equipment is that the first execution equipment is distributed before receiving affairs and participating in request
Affairs；Wherein, the affairs submit request that the local matter is completed for characterizing the first execution equipment；
When receiving the affairs submission instruction that the coordination equipment is sent, the local matter is submitted.
5. according to the method described in claim 4, it is characterized in that, the method is also after the submission local matter
Include:
Confirmation message is sent to equipment is coordinated, the confirmation message is for notifying the local matter to have been filed on.
6. according to the method described in claim 4, it is characterized in that, the method is also after the submission local matter
Include:
Release participates in the connection resource of the database of the local matter.
7. a kind of distributing real time system device, described device includes: the first receiving module, the second receiving module and the first transmission
Module, wherein
First receiving module is asked for receiving at least one described affairs participation for executing the first execution equipment in equipment
It asks；Wherein, the affairs participate in request and are able to carry out this for being in coordination equipment instruction the first execution equipment
The state of ground affairs；
Second receiving module submits request for receiving the affairs that the first execution equipment is sent；Wherein, the affairs
Submit request that the local matter is completed for characterizing the first execution equipment；
First sending module, the affairs for executing equipment based on described first submit request, and the execution of Xiang Suoshu first is set
Preparation send affairs to submit instruction.
8. a kind of distributing real time system device, described device includes: request module, execution module and submission module, wherein
The request module participates in request for sending affairs to coordination equipment；Wherein, the affairs participate in request for institute
It states coordination equipment and indicates that the first execution equipment is in the state for being able to carry out local matter；The coordination equipment is for managing
At least one executes equipment, includes the first execution equipment at least one described execution equipment；
The execution module is sent out when completing the processing of the local matter to the coordination equipment for executing local matter
Affairs are sent to submit request；Wherein, it is described before receiving affairs and participating in request that the local matter, which is the coordination equipment,
First executes the affairs of equipment distribution；Wherein, the affairs submit request that institute is completed for characterizing the first execution equipment
State local matter；
The submission module, for submitting the local thing when receiving the affairs submission instruction that the coordination equipment is sent
Business.
9. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program quilt
The step of any one of claim 1 to 6 the method is realized when processor executes.
10. a kind of distributing real time system device characterized by comprising processor and for store can be on a processor
The memory of the computer program of operation, wherein the processor is for when running the computer program, perform claim to be required
The step of any one of 1 to 6 the method.
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| CN112181377A (en) * | 2020-10-12 | 2021-01-05 | 汇智点亮科技(北京)有限公司 | Transaction manager collaboration framework for service invocation, design method and cloud platform |
| CN112445860A (en) * | 2019-09-02 | 2021-03-05 | 北京京东振世信息技术有限公司 | Method and device for processing distributed transaction |
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