CN110324397A - Intelligent substation station level application service interface access method based on Dynamic link library - Google Patents
Intelligent substation station level application service interface access method based on Dynamic link library Download PDFInfo
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- CN110324397A CN110324397A CN201910219831.0A CN201910219831A CN110324397A CN 110324397 A CN110324397 A CN 110324397A CN 201910219831 A CN201910219831 A CN 201910219831A CN 110324397 A CN110324397 A CN 110324397A
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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
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
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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
- H04L67/14—Session management
- H04L67/143—Termination or inactivation of sessions, e.g. event-controlled end of session
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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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- Computer Networks & Wireless Communication (AREA)
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- Telephonic Communication Services (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a kind of intelligent substation station level application service interface access method based on Dynamic link library, intelligent substation station level applied function module externally provides access interface in the form that application service is acted on behalf of, service access person uses the method and application service session of Dynamic link library, i.e. service access person access service when, dynamic creation network connection, the network connection is destroyed after access.The method that the present invention describes is based on Dynamic link library mechanism, realize the dynamic creation and destruction of network session between service access person and application service, on the basis of not influencing service access efficiency, greatly reduce network flow, the load level of Node station is reduced simultaneously, to the stability and maintainability of enhancing system, have important practical significance.
Description
Technical field
The invention belongs to intelligent substation station level technical fields, become more particularly, to a kind of intelligence based on Dynamic link library
Power station station level application service interface access method.
Background technique
Intelligent substation station level applied function module provides function access interface, intelligent substation station in the form of services
The applied function module for controlling layer is more, and each applied function module can provide multiple service access interfaces, with service access person
Expansion to application function requirements for access, the service access interface that the application of intelligent substation station level provides can increase therewith, such as
What meets different service access persons to the processing speed in the case of the request of different services and reply high concurrent, becomes especially
It is important.
What is currently generallyd use is the method for " long connection ", i.e., after service access connection is established, by sending and replying
Test frame maintains linkage availability.With the increase of application service interface increased and service visitor, required network connects
Connect it is also more and more, and these network connection when there is no business demand, still need to regularly send network test frame, this is greatly
The load of network flow and Node station is aggravated.How on the basis of not influencing service access efficiency, unnecessary net is reduced
The spending of network flow, the load for reducing Node station, the operation level for improving system, have important practical significance.
It is the explanation of some proper nouns used herein arrived below:
Dynamic link library: for the network connection of application service access creation, destroying at the end of application service access,
Validity without long term maintenance link.
Service access person mark: service access person carries out the unique identification of a service access, during service access
It carries always, and in the forwarding of service access result, according to this mark person that accurately identifies service access.
Task pool: the task block memory headroom opened up in advance is the memory source in thread data sharing.Due to task pool
There is provided the caching mechanism to task, it is possible to reduce continually create and recycle the overhead that task object example generates, task
Recycling function can reuse memory source, save memory source consumption.
Summary of the invention
The technical problems to be solved by the invention are just to provide a kind of intelligent substation station level based on Dynamic link library and answer
With service interface access method, this method is visited in intelligent substation station level system according to the service that service access person sends
Ask request, dynamic establishes the network connection with application service, and the connection is destroyed after service access, greatly reduces net
Network flow reduces the load of Node station, improves the operation level of system simultaneously.
In order to solve the above technical problems, the technical solution adopted in the present invention is as follows:
A kind of intelligent substation station level application service interface access method based on Dynamic link library, comprising the following steps:
S1, service access person send service request order to application service and act on behalf of；
S2, application service agency receive and parse through the service request order, are forwarded to corresponding application service on demand；
S3, application service response dynamics connection request handle service request order, and service processing result are replied to and is answered
Use service broker；
S4, application service agency receive the service request result of application service reply, the person that is forwarded to service access, destroy and are
The network connection of this time service access creation；
S5, service access person receive service access request as a result, judging next flag of frame, to carry out subsequent processing or behaviour
Make.
Preferably, step S2 specifically includes the following steps:
S2-1, application service agency's pretreatment thread receive and parse through the service request order, generate task block and clothes are added
Business request task queue；
S2-2, application service proxy requests task processing thread take out task block from request task queue, according to service
Type queries service list and the location information for obtaining application service；
The location information of S2-3, application service agency according to application service, establishes net as client and the application service
Network Dynamic link library；
After S2-4, successful connection, the service request order in task block is sent to application service by application service agency.
Preferably, step S3 specifically includes the following steps:
S3-1, application service monitor designated port, and the connection request of response application service broker, agency builds with application service
Vertical network dynamic connection；
S3-2, application service receive service request order, carry out business processing, processing result is replied to application service
Agency.
Preferably, step S4 specifically includes the following steps:
S4-1, application service agency receive the service request handling of application service reply as a result, creation result task block adds
Enter service request result task queue；
S4-2, application service proxy requests result task processing thread take out service request result from queue, and according to
Service access person mark, is forwarded to corresponding service access person；
S4-3, application service act on behalf of next flag of frame in judging result task block, determine whether this service access is tied
Beam is broken as the network connection of this service access creation if terminating.
Beneficial effects of the present invention:
The present invention is proposed a kind of based on Dynamic link library mechanism based on intelligent substation station level application service access
Application service access method greatly reduce network flow while not influencing service access efficiency, while reducing section
The load level of point machine has important practical significance to the stability and maintainability of enhancing system.
Detailed description of the invention
Fig. 1 is the principle of the present invention schematic diagram；
Fig. 2 is the interaction diagrams of application service access.
Specific embodiment
With reference to the accompanying drawing, embodiments of the present invention are illustrated.As shown in Figure 1, being the principle of the present invention schematic diagram.
Service access person establishes long connect when accessing intelligent substation station level application service interface between application service agency first
Connect, according to service access person send service access request, application service agency be forwarded on demand corresponding application service and with
Dynamic link library is established between application service, and network dynamic connection is destroyed at the end of service access.
As shown in Fig. 2, for the interaction diagrams of application service access.A kind of intelligent substation station control based on Dynamic link library
Layer application service interface access method, comprising the following steps:
S1, service access person send service request order to application service and act on behalf of.
The described application service agency is service access portal, is message terminal, the access request of service access person and
The response results of application service are forwarded by application service agency.
The major function of application service agency is to carry out the forwarding of service access request and service response result, therefore, such as
What, which designs one clog-free, that forward efficiency is high application service agency, is very important.It is same to meet multiple service access persons
When accessing a certain application service interface, access efficiency is unaffected, and application service agency is main to consider following three in design
A technical point: when 1. application services agency docks multiple service access persons as client, multiple specification examples and service are established
Visitor carries out communication interaction, and each specification example is driven by an individual thread；2. service request and service response
Forwarding is by the way of task queue.Service request order and service access result establish different task queues, and by difference
Thread carry out driving processing.3. when multiple service access persons simultaneously access to a certain application service interface, using clothes
It establishes multiple Dynamic link libraries between business agency and the application service to interact, the quantity of Dynamic link library and the number of service access person
Amount is consistent, and each Dynamic link library is driven by different threads respectively.
S2, application service agency receive and parse through the service request order, are forwarded to corresponding application service on demand.Specifically
The following steps are included:
S2-1, application service agency's pretreatment thread receive and parse through the service request order, generate task block and clothes are added
Business request task queue；
S2-2, application service proxy requests task processing thread take out task block from request task queue, according to service
Type queries service list and the location information for obtaining application service；
The location information of S2-3, application service agency according to application service, establishes net as client and the application service
Network Dynamic link library；
After S2-4, successful connection, the service request order in task block is sent to application service by application service agency.
The location information of the application service mainly includes the IP address and the clothes of host where the application service
The monitored port numbers of business, application service agency initiate network connection to the application service and ask according to the location information got
It asks.
S3, application service response dynamics connection request handle service request order, and service processing result are replied to and is answered
Use service broker.Specifically includes the following steps:
S3-1, application service monitor designated port, and the connection request of response application service broker, agency builds with application service
Vertical network dynamic connection；
S3-2, application service receive service request order, carry out business processing, processing result is replied to application service
Agency.
The monitoring designated port, for what is set up when application service starting, the listening port flexibly configurable,
And it is consistent with the location information that application service agency gets, by monitoring the port numbers, application service response application services generation
The connection request that haircut is sent obtains the application request that the connection is sent in the connection valid period, and service request result is replied
It is acted on behalf of to application service, if not having valid data frame in certain time, the network connection is actively destroyed in application service.
S4, application service agency receive the service request result of application service reply, the person that is forwarded to service access, destroy and are
The network connection of this time service access creation.Specifically includes the following steps:
S4-1, application service agency receive the service request handling of application service reply as a result, creation result task block adds
Enter service request result task queue；
S4-2, application service proxy requests result task processing thread take out service request result from queue, and according to
Service access person mark, is forwarded to corresponding service access person；
S4-3, application service act on behalf of next flag of frame in judging result task block, determine whether this service access is tied
Beam is broken as the network connection of this service access creation if terminating.
The service access person mark, is unique identification of a service access person during service access, is taking
It is carried always in business request forwarding and result Recovery Process, service access result is forwarded to by application service agency according to this mark
Corresponding service access person；When application service request results are longer, framing is taken to send mechanism, application service is acted on behalf of according to next
Whether frame identification decision request result is sent completely, and disconnecting after the completion of last frame forwarding is this between application service
Access the network connection of creation.
S5, service access person receive service access request as a result, equally judging next flag of frame, to carry out subsequent processing
Or operation.If next flag of frame is true, service access person will continue to receive service access request result；If next flag of frame is
False, service access person can disconnect the connection acted on behalf of with application service according to self-demand or continue to access next application
Service interface.
Service request result described in service request described in step S2 and step S4 is distinguished using task pool mechanism
Task queue memory headroom is opened up in management in advance, from application task block in task pool and need to be added in task queue when creating task
Wait in line to execute；After the completion of execution, task block is given back to task pool, is recycled.
In the access of application in substations functional interface, it is mostly " one-time consumption " that serviceization interface, which calls, that is, accesses and do not have
There is persistence or frequent.This access mechanism provides application foundation for dynamic network connection, and service access person is as client
End, it is not necessary to send test frame periodically to keep link, application service replys test acknowledgement frame without to service access person.
Claims (10)
1. the intelligent substation station level application service interface access method based on Dynamic link library, which is characterized in that service access
Person establishes long connection when accessing intelligent substation station level application service interface between application service agency first, according to
The service access request of service access person transmission, application service agency are forwarded to corresponding application service on demand and take with application
Dynamic link library is established between business, and network dynamic connection is destroyed at the end of service access.
2. the intelligent substation station level application service interface access method according to claim 1 based on Dynamic link library,
Characterized by comprising the following steps:
S1, service access person send service request order to application service and act on behalf of；
S2, application service agency receive and parse through the service request order, are forwarded to corresponding application service on demand；
S3, application service response dynamics connection request handle service request order, and service processing result are replied to using clothes
Business agency；
S4, application service agency receive the service request result of application service reply, and the person that is forwarded to service access destroys as this
The network connection of service access creation；
S5, service access person receive service access request as a result, judging next flag of frame, to carry out subsequent processing or operation.
3. the intelligent substation station level application service interface access method according to claim 2 based on Dynamic link library,
It is characterized in that, the agency of application service described in step S1 is service access portal, is message terminal, the visit of service access person
Ask that the response results of request and application service are forwarded by application service agency.
4. the intelligent substation station level application service interface access method according to claim 2 based on Dynamic link library,
It is characterized in that, step S2 specifically includes the following steps:
S2-1, application service agency's pretreatment thread receive and parse through the service request order, generate task block addition service and ask
Ask task queue；
S2-2, application service proxy requests task processing thread take out task block from request task queue, according to service type
Query service list and the location information for obtaining application service；
It is dynamic to establish network as client and the application service for the location information of S2-3, application service agency according to application service
State connection；
After S2-4, successful connection, the service request order in task block is sent to application service by application service agency.
5. the intelligent substation station level application service interface access method according to claim 4 based on Dynamic link library,
It is characterized in that, the location information of the application service, IP address and the service including host where the application service
The port numbers monitored.
6. the intelligent substation station level application service interface access method according to claim 2 based on Dynamic link library,
It is characterized in that, step S3 specifically includes the following steps:
S3-1, application service monitor designated port, and the connection request of response application service broker, agency establishes net with application service
Network Dynamic link library；
S3-2, application service receive service request order, carry out business processing, processing result is replied to application service generation
Reason.
7. the intelligent substation station level application service interface access method according to claim 6 based on Dynamic link library,
It is characterized in that, the monitoring designated port, for what is set up when application service starting, which can flexibly match
It sets, and consistent with the location information that application service agency gets, by monitoring the port numbers, application service response application service
The connection request sent is acted on behalf of, and service request result is returned back into application service agency.
8. the intelligent substation station level application service interface access method according to claim 2 based on Dynamic link library,
It is characterized in that, step S4 specifically includes the following steps:
S4-1, application service agency receive the service request handling of application service reply as a result, clothes are added in creation result task block
Business request results task queue；
S4-2, application service proxy requests result task processing thread take out service request result from queue, and according to service
Visitor's mark, is forwarded to corresponding service access person；
S4-3, application service act on behalf of next flag of frame in judging result task block, determine whether this service access terminates, if
Terminate the network connection for being then broken as the creation of this service access.
9. the intelligent substation station level application service interface access method according to claim 8 based on Dynamic link library,
It is characterized in that, the service access person identifies, it is unique identification of a service access person during service access,
It is carried always in service request forwarding and result Recovery Process, application service agency forwards service access result according to this mark
To corresponding service access person；When application service request results are longer, framing is taken to send mechanism, application service agency is under
Whether one frame identification decision request result is sent completely, and disconnects between application service thus after the completion of last frame forwarding
The network connection of secondary access creation.
10. the intelligent substation station level application service interface access method according to claim 9 based on Dynamic link library,
It is characterized in that, service request result described in service request described in step S2 and step S4, using task pool mechanism
It manages respectively, opens up task queue memory headroom in advance, need to apply for task block from task pool when creating task and task team is added
Wait in line to execute in column；After the completion of execution, task block is given back to task pool, is recycled.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112988370A (en) * | 2019-12-13 | 2021-06-18 | 南京品尼科自动化有限公司 | Intelligent communication management machine |
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