CN110347749A - A kind of method and system that the distributed class JSON data based on CRDT merge automatically - Google Patents
A kind of method and system that the distributed class JSON data based on CRDT merge automatically Download PDFInfo
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Abstract
The method and system that the distributed class JSON data based on CRDT that the invention discloses a kind of merge automatically.Wherein, the method that a kind of distributed class JSON data based on CRDT of the present invention merge automatically, comprising steps of the first back end of S11. sends data synchronization request information to the second back end；S12. the information that the request data that second back end receives that first back end is sent synchronizes；S13. second back end executes merging movement.The present invention can allow the independent progress data change of one group of equipment being under weak net environment, it is synchronized until restoring other nodes in network connection Shi Zaiyu network, the more new record of this node can be sent in synchronizing process, and the modification operation note of other nodes during suspension can be received, these records can all carry out data merging and Conflict solving automatically.
Description
Technical field
The present invention relates to field of computer technology more particularly to a kind of distributed class JSON data based on CRDT from dynamic circuit connector
And method and system.
Background technique
With the arrival of time of cell-phone, more and more equipment are integrated into network, including mobile phone, sensor, insertion
Terminal, household electrical appliance etc..But to be not so good as wired connection always with timeliness secure for the stability of wireless transmission, especially works as
Equipment is in special environment, such as the place that basement, field wireless signal do not cover.This just needs a kind of method
Enable these equipment work at the same time have net and environment without net in, and with the change of central server data during suspension
More, the change of equipment data itself just forms data difference among this, these differences have simple annexable difference, can also
Can occur that complicated there are the differences that conflict can not merge.
If the patent of Publication No. CN109408589A discloses a kind of method of data synchronization and device, for by source data
Data in library are synchronized to MPP database, and method includes: to obtain preset quantity item operation language from the journal file of source database
Sentence, every action statement includes the version information of the action statement；The cancel statement in preset quantity action statement is searched, and
When finding cancel statement, the version information object run older than the cancel statement is determined in preset quantity action statement
Sentence, and the insertion sentence for the deletion condition for meeting the cancel statement is searched in object run sentence as sentence to be deleted；
The sentence to be deleted is deleted from preset quantity action statement, and the insertion sentence in remaining action statement is merged,
And the data of MPP database are updated according to the action statement after merging.So, it is possible to reduce the operation time executed when more new data
Number, so that the time delay of more new data is reduced, to improve the consistency of source database and the data in MPP database.Above-mentioned side
Method, which discloses, merges the insertion sentence in remaining action statement, but for during suspension with central server
The change of data still cannot carry out data merging in the case where there is net in period.
In the prior art, centralized server is mostly used for using the similar product based on CRDT algorithm to handle more piece
Conflict between point.Wherein, tradable replicate data Type C RDT method is consistency maintaining method emerging in recent years.Mainly
Thought can be tieed up being mapped in internal data structure for operation object total order by distributing to the unique global ID of operation object
The consistency that shield operation is intended to, and converge on the result of consistency.Compared with the method for traditional consistency maintenance, CRDT method
Computational efficiency it is higher, have well operation responsiveness.
But the prior art use centralized server is mostly used for based on the product of CRDT algorithm to handle multinode
Between conflict, and be not self synchronizing between multinode.It or is designed based on JSON similar data structure
Method, for example designed with XML.Some only support simple basic data type such as number or character again, to embedding
The unordered pair of set as or ordered list can not completely support.In order to solve the problems present invention propose it is a kind of based on CRDT's
The method and system that distributed class JSON data merge automatically.
Summary of the invention
The purpose of the present invention is in view of the drawbacks of the prior art, provide a kind of distributed class JSON data based on CRDT
Automatically the method and system merged can allow one group of independent progress data change of the equipment being under weak net environment,
It is synchronized until restoring other nodes in network connection Shi Zaiyu network, the update note of this node can be sent in synchronizing process
Record, and can receive the modification operation note of other nodes during suspension, these records can all carry out data automatically and merge and conflict
It solves.
In order to achieve the goal above, the invention adopts the following technical scheme:
A method of the distributed class JSON data based on CRDT merge automatically, comprising steps of
S1. the first back end sends data synchronization request information to the second back end；
S2. the information that the request data that second back end receives that first back end is sent synchronizes；
S3. second back end executes merging movement.
Further, before the step S1 further include:
Modify the data in first back end；
According to the data of the modification, the synchronous preparation of data is carried out.
Further, before the step S1 further include:
Judge in the first back end with the presence or absence of the network information；If it exists, S1 is thened follow the steps.
Further, before the step S2 further include:
In the second back end, it is synchronous that it is ready for data in real time；
Judge in the second back end with the presence or absence of the network information；If it exists, S2 is thened follow the steps.
Further, before the step S3 further include:
The information synchronous to the request data received merges test.
Further, the data in the first back end of the modification include addition, modification, delete, insertion, push, close
And it old version inquiry, cumulative, regressive, one of cancels or a variety of.
The system that the distributed class JSON data based on CRDT merge automatically correspondingly, the present invention also provides a kind of, comprising:
Sending module sends data synchronization request information to the second back end for the first back end；
Receiving module receives what the request data that first back end is sent synchronized for second back end
Information；
Execution module executes merging movement for second back end.
Further, further includes:
Modified module, for modifying the data in first back end；
First prepares synchronization module, for the data according to the modification, carries out the synchronous preparation of data；
First judgment module, for judging in the first back end with the presence or absence of the network information.
Further, further includes:
Second prepares synchronization module, synchronous in the second back end, being ready for data in real time；
Second judgment module, for judging in the second back end with the presence or absence of the network information.
Further, further include
Test module merges test for the information synchronous to the request data received.
Compared with prior art, the present invention can allow one group of equipment being under weak net environment is independent to count
According to change, is synchronized until restoring other nodes in network connection Shi Zaiyu network, this node can be sent in synchronizing process
More new record, and the modification operation note of other nodes during suspension can be received, these records can all carry out data conjunction automatically
And and Conflict solving.
Detailed description of the invention
Fig. 1 is a kind of process for distributed automatic merging method of class JSON data based on CRDT that embodiment one provides
Figure；
Fig. 2 is a kind of structure for distributed automatic combination system of class JSON data based on CRDT that embodiment three provides
Figure；
Fig. 3 is that the present embodiment one provides a kind of signal of method that the distributed class JSON data based on CRDT merge automatically
Figure；
Fig. 4 is Conflict solving schematic diagram when concurrently modifying same key assignments that the present embodiment two provides；
Fig. 5 is Conflict solving schematic diagram when concurrently modifying same ordered list that the present embodiment two provides；
Fig. 6 is the concurrently modification Conflict solving schematic diagram for the complicated nested object that the present embodiment two provides；
Fig. 7 is the timestamp algorithm that the present embodiment two provides；
Fig. 8 is timing derivation algorithm between the multinode that the present embodiment two provides；
Fig. 9 is the storage for the atomic operation that the present embodiment one provides；
Figure 10 is the method branch that a kind of distributed class JSON data based on CRDT that the present embodiment two provides merge automatically
The data structure held；
Figure 11 is the method branch that a kind of distributed class JSON data based on CRDT that the present embodiment two provides merge automatically
The data manipulation method held；
Figure 12 is the operating method that the number that provides of the present embodiment two, character, unordered pair are supported as, ordered-object.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
The purpose of the present invention is in view of the drawbacks of the prior art, provide a kind of distributed class JSON data based on CRDT
Automatically the method and system merged.
Embodiment one
The method that the distributed class JSON data based on CRDT that the present embodiment provides a kind of merge automatically, as shown in Figure 1, packet
Include step:
S11. the first back end sends data synchronization request information to the second back end；
S12. the information that the request data that second back end receives that first back end is sent synchronizes；
S13. second back end executes merging movement.
In the present embodiment, it is further comprised the steps of: before step S11
Modify the data in first back end；
First back end can be number, character, unordered pair as, ordered-object etc..
In the present embodiment, the data modified in the first back end include being added, modifying to data, deleting, inserting
Enter, push, merging, old version inquiry, cumulative, regressive, cancelling etc..
In the present embodiment, the method that atomic operation can be used of modifying to data modifies to data.
Atomic operation, which refers to, not to be needed to synchronize, the operation that will not be interrupted by thread scheduling mechanism；This operation is once opened
Begin, just run to ends always, it is intermediate do not have it is any be switched to another thread, and it can be a step, can also be with
It is multiple operating procedures, but its sequence cannot be disturbed, and cannot also be cut and only carry out a part therein.
In the present embodiment, the storage definition of atomic operation is such as shown such as Fig. 9, the algorithm define an atomic operation and
Thus the storage of the one group of atomic operation formed defines.
According to the data of the modification, the synchronous preparation of data is carried out.
In the present embodiment, it modifies in the first back end to data, and modified data is entered into data
The synchronous preparation stage.
Judge in the first back end with the presence or absence of the network information；If it exists, S11 is thened follow the steps.
Whether the first back end real-time judge is currently in the state for having network, if so, thening follow the steps S11；If it is not,
Then continue to modify to data in the first back end.
The first back end in the present embodiment be synchronized in the state of having network, if without network, can be into
Row independent operation.
In step s 11, the first back end sends data synchronization request information to the second back end.
Specifically, the data of modification are synchronized, the first data section when the first back end is in the state for having net
Point obtains the data of modification, and the data of the modification of acquisition are transmitted to the second back end by Web broadcast.Wherein, it obtains
What is obtained in the data of modification is historical data, i.e., by repairing under no net state to the data in the first back end
Change, after having network, the data that history is modified are synchronized.
In step s 12, what the request data that second back end receives that first back end is sent synchronized
Information.
It is further comprised the steps of: before step S12
In the second back end, it is synchronous that it is ready for data in real time；
In the present embodiment, the second back end is prepared to enter into data synchronization phase in real time.
Judge in the second back end with the presence or absence of the network information；If it exists, S12 is thened follow the steps.
Whether the second back end real-time judge is currently in the state for having network, if so, thening follow the steps S12；If it is not,
It then returns and is ready for data synchronization phase.
The second back end in the present embodiment be synchronized in the state of having network, if without network, can be into
Row independent operation.
In step s 12, it is same to receive the data that the first back end is sent in the state of having network for the second back end
Walk solicited message.
In the present embodiment, the second back end also judge to receive the synchronous information of data whether with the second back end
In data synchronization information be overlapped or the data synchronization information that whether is contained in the second back end.
In step s 13, second back end executes merging movement.
In the present embodiment, if in data synchronization information in the first back end received and the second back end
Data synchronization information be overlapped or the data synchronization information that is contained in the second back end in, then the first data section for will receiving
Data synchronization information in point merges with the data synchronization information in the second back end, and by the data synchronization information after merging
It is added to synchronous list.Wherein, list is synchronized as the task list of wanted synchrodata.
If the data synchronization information letter not synchronous with the data in the second back end in the first back end received
In breath coincidence or the data synchronization information being not included in the second back end, then by the number in the first back end received
Merge according to synchronizing information with the data synchronization information in the second back end, and the data synchronization information after merging is added to together
Walk list.Wherein, list is synchronized as the task list of wanted synchrodata.
In the present embodiment, it is further comprised the steps of: before the step S13
The information synchronous to the request data received merges test.
In the present embodiment, to the data in the data information and the second back end in the first back end received
Information merges test, if being successfully tested, executes merging；If test crash, retests or receive first again
Data information in back end.
As shown in figure 3, being a kind of method that the distributed class JSON data based on CRDT merge automatically provided by the present application
Schematic diagram.
The present embodiment can allow the independent progress data change of one group of equipment being under weak net environment, until extensive
Other nodes being connected to the network in Shi Zaiyu network again synchronize, and the more new record of this node can be sent in synchronizing process, and
The modification operation note of other nodes during suspension can be received, these records can all carry out data merging and Conflict solving automatically.
Embodiment two
The method and embodiment one that a kind of distributed class JSON data based on CRDT provided in this embodiment merge automatically
The difference is that:
The present embodiment is illustrated with different situations.
It is illustrated with concurrently modifying Conflict solving when same key assignments.
As shown in figure 4, the data of node A are { key 1: " value 1 " }, the data of node B are { key 1: " value 1 " }.
It is { key 1: " value 3 " } by the data modification of node B, if working as if the data of node A need to be changed to { key 1: " value 2 " }
Before be in net state, then the data of the data of node A and node B are subjected to Network Synchronization, then be key 1: " value 2 ",
" value 3 " }.
It is illustrated with concurrently modifying Conflict solving when same ordered list.
As shown in figure 5, the data of node A are [" value 1 "], the data of node B are [" value 3 "].
It is [" value 3 ", " value 4 "] by the data modification of node B if the data of node A need to be changed to [" value 1 ", " value 2 "],
If being currently in net state, the data of node A and the data of node B are subjected to Network Synchronization, then be [" value 1 ",
" value 2 ", " value 3 ", " value 4 "].
It is illustrated with the concurrently modification Conflict solving of complicated nested object.
As shown in fig. 6, the data of node A are { " object 1 ": [{ " key 1 ": " value 1 ", " key 2 ": " value 2 " }] }, node B's
Data are { " object 1 ": [{ " key 1 ": " value 1 ", " key 2 ": " value 2 " }] }.
It is { " object 1 ": [{ " key by the data modification of node B if the data of node A need to be changed to { " object 1 ": [] }
2 ": " value 2 " }] }, if being currently in net state, the data of node A and the data of node B are subjected to Network Synchronization, then
It is { " object 1 ": [{ " key 2 ": " value 2 " }] }.
The present embodiment using a kind of method that the distributed class JSON data based on CRDT merge automatically by may be implemented
One group of distribution can concurrent operations, and the data storage network being finally consistent simultaneously can be used for setting under weak net environment
Standby endpoint is synchronous with the residual quantity between central server, and solves the conflict merging during suspension automatically.
In the present embodiment, one kind being established by the distribution of CRDT and timestamp algorithm lamport timestamps
The data structure of class JSON, this data structure support the nested structure of unordered dictionary and ordered list, while devising corresponding
Atomization operating method such as adds, modifies, deleting, being inserted into, pushing, merging, old version inquiry, adds up, regressive, cancels.
The method of atomic operation is distributed in each node by the present embodiment, and each node is made to have the concurrent operations of independent parallel, and
Without the policy of Central Government node of a holding real-time synchronization.Therefore it is suitable for the differences such as traditional central site network, point to point network
Network environment, while it is insensitive to the timeliness of network connection, support the residual quantity under weak net environment synchronous.The present embodiment utilizes original
The order of sub-operation makes the data of different nodes keep final consistent effect after irregularly synchronizing.
In the present embodiment, timestamp algorithm lamport timestamps, the algorithm define in distributed network
Concurrent atomic operation timing confirmation, it is as shown in Figure 7 that key derives definition.
In the present embodiment, algorithm is also derived using timing between multinode, which is used to determine one between multiple nodes
The successive timing of group atomic operation, as shown in Figure 8.
The data that the method that a kind of distributed class JSON data based on CRDT provided in this embodiment merge automatically is supported
Structure includes number, character, unordered pair as, ordered-object etc..As shown in Figure 10.
The data that the method that a kind of distributed class JSON data based on CRDT provided in this embodiment merge automatically is supported
Operating method includes initialization, executes modification, execute change, performance variable, connection, obtain conflict, obtain modification history, execute
Merge, restore, reforming, broadcasting, obtaining, whether can restore, compare.As shown in figure 11.
In the present embodiment, as shown in figure 12, the operating method point that number, character, unordered pair are supported as, ordered-object
Do not include:
Number: increase, reduce；
Character: designated position insertion, designated position are deleted, splicing, are obtained；
Unordered list: addition, rows, all keys are obtained, according to key value, total amount, screening, superposition；
Ordered list: it is added, interception, designated position insertion, designated position deletion, cutting, total amount.
The present embodiment can allow the independent progress data change of one group of equipment being under weak net environment, until extensive
Other nodes being connected to the network in Shi Zaiyu network again synchronize, and the more new record of this node can be sent in synchronizing process, and
The modification operation note of other nodes during suspension can be received, these records can all carry out data merging and Conflict solving automatically.
Embodiment three
The system that the distributed class JSON data based on CRDT that the present embodiment provides a kind of merge automatically, as shown in Fig. 2, packet
It includes:
Sending module 11 sends data synchronization request information to the second back end for the first back end；
It is synchronous to receive the request data that first back end is sent for second back end for receiving module 12
Information；
Execution module 13 executes merging movement for second back end.
In the present embodiment, further includes:
Modified module, for modifying the data in first back end；
First back end can be number, character, unordered pair as, ordered-object etc..
In the present embodiment, the data modified in the first back end include being added, modifying to data, deleting, inserting
Enter, push, merging, old version inquiry, cumulative, regressive, cancelling etc..
In the present embodiment, the method that atomic operation can be used of modifying to data modifies to data.
Atomic operation, which refers to, not to be needed to synchronize, the operation that will not be interrupted by thread scheduling mechanism；This operation is once opened
Begin, just run to ends always, it is intermediate do not have it is any be switched to another thread, and it can be a step, can also be with
It is multiple operating procedures, but its sequence cannot be disturbed, and cannot also be cut and only carry out a part therein.
First prepares synchronization module, for the data according to the modification, carries out the synchronous preparation of data.
In the present embodiment, it modifies in the first back end to data, and modified data is entered into data
The synchronous preparation stage.
First judgment module, for judging in the first back end with the presence or absence of the network information.
Whether the first back end real-time judge is currently in the state for having network, if so, sending out to the second back end
Send data synchronization request information；If it is not, then continuing to modify to data in the first back end.
The first back end in the present embodiment be synchronized in the state of having network, if without network, can be into
Row independent operation.
In sending module 11, the first back end sends data synchronization request information to the second back end.
Specifically, the data of modification are synchronized, the first data section when the first back end is in the state for having net
Point obtains the data of modification, and the data of the modification of acquisition are transmitted to the second back end by Web broadcast.Wherein, it obtains
What is obtained in the data of modification is historical data, i.e., by repairing under no net state to the data in the first back end
Change, after having network, the data that history is modified are synchronized.
In receiving module 12, it is synchronous that second back end receives the request data that first back end is sent
Information.
In the present embodiment, further includes:
Second prepares synchronization module, synchronous in the second back end, being ready for data in real time；
In the present embodiment, the second back end is prepared to enter into data synchronization phase in real time.
Second judgment module, for judging in the second back end with the presence or absence of the network information.
Whether the second back end real-time judge is currently in the state for having network, if so, receiving the first back end
The data synchronization request information of transmission；Data synchronization phase is ready for if it is not, then returning.
The second back end in the present embodiment be synchronized in the state of having network, if without network, can be into
Row independent operation.
In receiving module 12, the second back end receives the data of the first back end transmission in the state of having network
Synchronization request information.
In the present embodiment, the second back end also judge to receive the synchronous information of data whether with the second back end
In data synchronization information be overlapped or the data synchronization information that whether is contained in the second back end.
In execution module 13, second back end executes merging movement.
In the present embodiment, if in data synchronization information in the first back end received and the second back end
Data synchronization information be overlapped or the data synchronization information that is contained in the second back end in, then the first data section for will receiving
Data synchronization information in point merges with the data synchronization information in the second back end, and by the data synchronization information after merging
It is added to synchronous list.Wherein, list is synchronized as the task list of wanted synchrodata.
If the data synchronization information letter not synchronous with the data in the second back end in the first back end received
In breath coincidence or the data synchronization information being not included in the second back end, then by the number in the first back end received
Merge according to synchronizing information with the data synchronization information in the second back end, and the data synchronization information after merging is added to together
Walk list.Wherein, list is synchronized as the task list of wanted synchrodata.
In the present embodiment, further includes:
Test module merges test for the information synchronous to the request data received.
In the present embodiment, to the data in the data information and the second back end in the first back end received
Information merges test, if being successfully tested, executes merging；If test crash, retests or receive first again
Data information in back end.
The present embodiment can allow the independent progress data change of one group of equipment being under weak net environment, until extensive
Other nodes being connected to the network in Shi Zaiyu network again synchronize, and the more new record of this node can be sent in synchronizing process, and
The modification operation note of other nodes during suspension can be received, these records can all carry out data merging and Conflict solving automatically.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (10)
1. a kind of method that the distributed class JSON data based on CRDT merge automatically, which is characterized in that comprising steps of
S1. the first back end sends data synchronization request information to the second back end；
S2. the information that the request data that second back end receives that first back end is sent synchronizes；
S3. second back end executes merging movement.
2. the method that a kind of distributed class JSON data based on CRDT according to claim 1 merge automatically, feature
It is, before the step S1 further include:
Modify the data in first back end；
According to the data of the modification, the synchronous preparation of data is carried out.
3. the method that a kind of distributed class JSON data based on CRDT according to claim 1 or 2 merge automatically, special
Sign is, before the step S1 further include:
Judge in the first back end with the presence or absence of the network information；If it exists, S1 is thened follow the steps.
4. the method that a kind of distributed class JSON data based on CRDT according to claim 3 merge automatically, feature
It is, before the step S2 further include:
In the second back end, it is synchronous that it is ready for data in real time；
Judge in the second back end with the presence or absence of the network information；If it exists, S2 is thened follow the steps.
5. the method that a kind of distributed class JSON data based on CRDT according to claim 4 merge automatically, feature
It is, before the step S3 further include:
The information synchronous to the request data received merges test.
6. the method that a kind of distributed class JSON data based on CRDT according to claim 2 merge automatically, feature
It is, the data in the first back end of the modification include addition, modification, delete, insertion, push, merge, old version looks into
It askes, is cumulative, regressive, one of cancelling or a variety of.
7. a kind of system that the distributed class JSON data based on CRDT merge automatically characterized by comprising
Sending module sends data synchronization request information to the second back end for the first back end；
Receiving module receives the letter that the request data that first back end is sent synchronizes for second back end
Breath；
Execution module executes merging movement for second back end.
8. the system that a kind of distributed class JSON data based on CRDT according to claim 7 merge automatically, feature
It is, further includes:
Modified module, for modifying the data in first back end；
First prepares synchronization module, for the data according to the modification, carries out the synchronous preparation of data；
First judgment module, for judging in the first back end with the presence or absence of the network information.
9. the system that a kind of distributed class JSON data based on CRDT according to claim 7 or 8 merge automatically, special
Sign is, further includes:
Second prepares synchronization module, synchronous in the second back end, being ready for data in real time；
Second judgment module, for judging in the second back end with the presence or absence of the network information.
10. the system that a kind of distributed class JSON data based on CRDT according to claim 9 merge automatically, feature
It is, further includes
Test module merges test for the information synchronous to the request data received.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111124384A (en) * | 2019-12-23 | 2020-05-08 | 中国航发控制***研究所 | JSON-based IO and control logic configuration integration method |
| CN112685326A (en) * | 2021-01-26 | 2021-04-20 | 政采云有限公司 | Software testing method, system, equipment and readable storage medium |
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