CN107770258A - A kind of asynchronous call turns the implementation method of synchronization call - Google Patents
A kind of asynchronous call turns the implementation method of synchronization call Download PDFInfo
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- CN107770258A CN107770258A CN201710936510.3A CN201710936510A CN107770258A CN 107770258 A CN107770258 A CN 107770258A CN 201710936510 A CN201710936510 A CN 201710936510A CN 107770258 A CN107770258 A CN 107770258A
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- call
- proxy function
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- service end
- synchronization
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
Abstract
The present invention relates to the implementation method that a kind of asynchronous call turns synchronization call, this method can be by creating proxy function in client, need to be called mode change when, call request message is initiated from proxy function to service end, and lock proxy function, proxy function is set to enter wait state, when service end is called and returned, release proxy function locking, realize client and service end or other flows for needing to use asynchronous call mode to interact, it can be handled in the way of synchronization call, simplify the design of flow, introduce overtime design simultaneously, avoid process lock.
Description
Technical field
The invention belongs to the communication technical field in direct current transportation monitoring system, and in particular to a kind of asynchronous call turns synchronous
The implementation method of calling.
Background technology
It is general to use the customer end/server mode based on network connection in the monitoring system of direct current transportation, and in visitor
When family end needs to call the function of service end to perform some functions, generally there are two kinds of method of calling, asynchronous call or synchronization call.
So-called synchronization call, exactly when sending One function calling, before result is not obtained, the calling is not just returned
Return.Fig. 1 is the schematic flow sheet for the synchronization call that a client obtains data from server end.In this synchronization call flow
In, after client sends call request, the content of request performs in service end, and in this implementation procedure, client exists always
Implementing result is waited, only after the request of service end terminates simultaneously returning result, client just continues downward execution.
Asynchronous concept and synchronization is relative.After an asynchronous procedure call is sent, result is not immediately available in caller.
The part of this calling of actual treatment in the completed, caller is notified by state, notice and readjustment.Fig. 2 is a client
Hold the schematic flow sheet for the asynchronous call that data are obtained from server end.In this asynchronous call flow, client sends tune
After request, request content performs in service end, but client is not to wait for implementing result, and is to continue with performing downwards, services
When the request of device performs end and returning result, client is continued executing with other processing function returning part.
The advantage of synchronization call is clear process, and logic is clear and definite, and asynchronous call is because can be in client and service end
Perform simultaneously, therefore efficiency is higher.
In the monitoring system of direct current transportation, due to network call be in itself based on asynchronous system, therefore client and
During server interaction, acquiescence is all asynchronous system.In most application scenarios, this mode be all it is proper,
The acquisition and refreshing of such as data, asynchronous system execution efficiency is high, and does not wait mutually, and Consumer's Experience is good.But there are some should
With scene, the execution such as ordered, because these application scenarios need to get implementing result at once, further according to implementing result not
With the implementation procedure for judging next step, complex using flow during asynchronous call, Fig. 3 is an order in asynchronous mode
Perform schematic flow sheet.It was found from from flow chart, in asynchronous mode, next step behaviour is just carried out after needing calling to be finished
The step of making, be required for restarting a loop body, ceaselessly judge call execution state, cause in flow occur circulation and
Branch, complex, if considering further that the failure possibility of each execution step, flow chart can be more complicated.Fig. 4 is synchronous mould
Order under formula performs flow, from flow diagram, flow relative simplicity, and is all that order performs, and does not circulate and branch.
Therefore, how synchronization call is realized in asynchronous network, is worth discussion.
The content of the invention
The technical problems to be solved by the invention be just carried out after some application scenarios need calling to be finished it is next
It is complex using flow during asynchronous call during step operation, it is then desired to obtain realizing synchronization in a kind of asynchronous call network
Method.
In order to solve the above technical problems, the invention provides the implementation method that a kind of asynchronous call turns synchronization call, including
Step：
1) a proxy function is created in client；
2) need to be called mode change when, asynchronous function call proxy function, sent out from proxy function to service end
Call request message is played, proxy function is locked, proxy function is entered wait state；
3) when client monitors to service end, which are called, to be returned, proxy function locking is released, and records service end return
Implementing result.
In step 2), while proxy function is locked, start timing, timing time-out is returned without receiving service end calling
Proxy function locking is directly released when returning, and returns to the return value of acquiescence.
When network error causes funcall to malfunction, release proxy function and lock and return to the return value of acquiescence.
The return value of the acquiescence malfunctions to call.
The present invention sets proxy function using in client, initiates call request by proxy function, and initiating request
Proxy function is locked simultaneously, proxy function is entered wait state, until when the calling that client receives service end returns,
Release proxy function locking, the calling under script asynchronous mode, switch to synchronization call so that client and service end or its
He needs to use the flow that asynchronous call mode interacts, and can be designed in the way of synchronization call, so as to simple flow
Implementation procedure, meanwhile, by time-out processing, avoid process lock.
Brief description of the drawings
Fig. 1 is synchronization call schematic flow sheet；
Fig. 2 is asynchronous call schematic flow sheet；
Fig. 3 is the order execution flow chart under asynchronous mode；
Fig. 4 is the order execution flow chart under synchronous mode；
Fig. 5 is transition diagram of the asynchronous call of the present invention to synchronization call.
Embodiment
Technical scheme is described further below in conjunction with the accompanying drawings：
Handed over as shown in figure 5, being used for client in direct current transportation monitoring system the invention provides one kind with service end
Mutual asynchronous call turns the implementation method of synchronization call, and this method comprises the following steps：
Step 101：A proxy function is created in client (function call side), for all asynchronous function calls；
Step 102：When need to be called mode change when, by this proxy function complete call, this function is taking
It is engaged in before the implementing result return at end, all without return, i.e., locks proxy function；
The function call of service end is carried out in proxy function, and after calling initiation to terminate, will according to corresponding mark
Proxy function locks, for making proxy function enter wait state；
Step 103：When service end is called and returned, client is notified by state, notice and readjustment, now releases generation
Function locking is managed, and returns to implementing result.
, can not in order to prevent client to be absorbed in endless loop because the real-time of network transmission is limited by communication condition
The mandatory restarting of client caused by response system message, and possibility, also add while proxy function is locked
Clocking capability, and control agent function is jumped out after timing time-out.
Thus as the further improvement to this programme, while proxy function locks, this calling timing is given, is being counted
When at the end of, if do not receive still service end call return, directly release proxy function locking, and return call out
It is wrong.When preventing funcall error (such as network error, service end do not return abnormal), function will not deadlock, it is unlimited etc. to cause
Treat.
Asynchronous call turns synchronization call embodiment：
Assuming that there is the mode of an asynchronous transmission order, but this subcommand is needed to carry out next life after being finished
Order, the proxy function for needing during execution to be created using client are sent instruction " sendcmd+ spaces+command number " and arrive service end, and
Proxy function is locked while sending and instructing, is waited for proxy function, service end, which receives, orders and verify success
After can return to " receivecmd+ spaces+command number+check results ", after client receives return command, release proxy function
Locking, while record the implementing result of return.The command number for once needing to perform is 10001, then the realization side of proxy function
Formula and the data step sent are：
1) instruction " sendcmd 10001 " is sent；
2) proxy function is locked, into wait state；
3) timing is started while step 2)；
4) judge whether to return, return value is recorded if returning and releases proxy function locking；
5) judge whether time-out, proxy function locking is released if time-out, while return to calling error；
6) 4-5 is repeated；
7) returned after unlocking.
In above-mentioned flow, as server successfully returns, then proxy function locking is released when performing step 4, is remembered simultaneously
The return value of service end is recorded, as server returns not successfully, then proxy function locking, function return are released when performing step 5
The return value (be traditionally arranged to be time-out error or call error) of acquiescence.
The implementation method for turning synchronization call to a kind of asynchronous call of the present invention above is described in detail, and
A specific embodiment is applied to be illustrated the principle and embodiment of the present invention, but the present invention be not limited to it is described
Embodiment.The basic ideas of the present invention are above-mentioned basic scheme, for those of ordinary skill in the art, according to the present invention
Teaching, design the models of various modifications, flow, method etc. and creative work need not be spent.The present invention is not being departed from
Principle and spirit in the case of to embodiment carry out change, modification, replacement and modification still fall within the present invention protection model
In enclosing.
Claims (4)
1. a kind of asynchronous call turns the implementation method of synchronization call, it is characterised in that including step：
1) a proxy function is created in client；
2) need to be called mode change when, asynchronous function call proxy function, initiate to adjust from proxy function to service end
With request message, proxy function is locked, proxy function is entered wait state；
3) when client monitors to service end, which are called, to be returned, proxy function locking is released, and record the execution of service end return
As a result.
2. asynchronous call according to claim 1 turns the implementation method of synchronization call, it is characterised in that in step 2),
While locking proxy function, start timing, timing time-out acts on behalf of letter without receiving directly to release when service end is called and returned
Number locking, and return to the return value of acquiescence.
3. asynchronous call according to claim 2 turns the implementation method of synchronization call, it is characterised in that when network error is made
Call out and stagger the time into function, release proxy function and lock and return to the return value of acquiescence.
4. the asynchronous call according to Claims 2 or 3 turns the implementation method of synchronization call, it is characterised in that the acquiescence
Return value for call malfunction.
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| CN201710936510.3A CN107770258A (en) | 2017-10-10 | 2017-10-10 | A kind of asynchronous call turns the implementation method of synchronization call |
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Cited By (3)
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| CN109067669A (en) * | 2018-09-06 | 2018-12-21 | 华泰证券股份有限公司 | Synchronization call method and application based on asynchronous interface |
| CN111435314A (en) * | 2019-01-11 | 2020-07-21 | 武汉瓯越网视有限公司 | Method, system, server and storage medium for waiting asynchronous message without blocking thread |
| CN113347151A (en) * | 2021-04-28 | 2021-09-03 | 厦门海迈科技股份有限公司 | Data interaction method based on socket shared memory |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109067669A (en) * | 2018-09-06 | 2018-12-21 | 华泰证券股份有限公司 | Synchronization call method and application based on asynchronous interface |
| CN111435314A (en) * | 2019-01-11 | 2020-07-21 | 武汉瓯越网视有限公司 | Method, system, server and storage medium for waiting asynchronous message without blocking thread |
| CN113347151A (en) * | 2021-04-28 | 2021-09-03 | 厦门海迈科技股份有限公司 | Data interaction method based on socket shared memory |
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Application publication date: 20180306 |