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Query access method, apparatus and system based on CIM model

An access method and access device technology, applied in the field of data transmission, can solve problems such as excessive interaction and inability to release CIM objects, and achieve the effects of increasing the amount of cached data, reducing server queries, and balancing memory usage

Active Publication Date: 2018-04-13
GUANGDONG POWER GRID CO LTD INFORMATION CENT
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Problems solved by technology

[0004] The main purpose of the present invention is to propose a query and access method based on the CIM model, aiming at replacing the strong reference relationship between CIM objects with soft references, and forming a two-level stepped CIM object cache pool by the soft reference pool and the weak reference pool. Solved the problem of excessive interaction with the server when accessing CIM objects frequently in a short period of time and garbage collection cannot release the referenced CIM objects

Method used

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  • Query access method, apparatus and system based on CIM model
  • Query access method, apparatus and system based on CIM model

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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0048] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

The present invention discloses a query access method, apparatus and system based on a CIM model, and belongs to the technical field of data transmission. The method comprises: generating a CIM objectclass based on a CIM model, wherein the CIM object class comprises an ID that uniquely identifies the CIM object and a timestamp that records the current access time of the CIM object, and the ID ofthe CIM object is the value of a reference pool entry; creating a two-level ladder-type CIM object cache pool formed by a soft reference pool and a weak reference pool; receiving a query access request of a target object, and obtaining the target object ID; querying whether the ID of the target object is matched with the ID of the CIM object referenced by the CIM object cache pool; if the query issuccessful, accessing the queried CIM object; and if the query fails, returning to a server for query access. According to the technical scheme of the present invention, problems of excessive interaction with the server due to short-term frequent access to the CIM object and garbage collection failing to release the referenced CIM object are solved.

Description

technical field [0001] The invention relates to the technical field of data transmission, in particular to a query access method, device and system based on a CIM model. Background technique [0002] The Common Information Model (CIM) proposed by IEC 61970 series standards has been widely used in power systems. When using Java to develop client applications such as topology analysis and data quality overall inspection of large-scale power grid models, it is necessary to perform multiple rounds of traversal processing based on the hierarchical containment relationship of objects and the association relationship between objects, that is, it is necessary to classify the collection of objects As well as the network and tree relationships between objects (each object constitutes a node in the data structure), complete breadth-first or depth-first analysis as required. During the analysis process, some object data will be accessed repeatedly at a certain stage, and then when othe...

Claims

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Application Information

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IPC IPC(8): G06F9/50G06F9/455
CPCG06F9/45558G06F9/5016G06F9/5022G06F9/5083
Inventor 江疆邓楚然谢善益曾强萧展辉周珑黄剑文李林发梁成辉余益龙徐庆平
Owner GUANGDONG POWER GRID CO LTD INFORMATION CENT
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