CN106547537B - Method for realizing assembled electric power application software based on QML technology - Google Patents
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Abstract
The invention discloses a method for realizing assembled electric power application software based on QML technology, which mainly comprises the following steps: realizing dynamic expansion of the attribute describing the power equipment; associating specific function extension modules for the attributes of the extended power equipment; therefore, the attribute of the power equipment in the dynamic extension software can be realized, the attribute of the power equipment is associated with the functional module, the association of the software and the newly added functional module is realized, the effect of extending the function is achieved under the condition that the source program is not changed, and the operation of the power equipment is more stable.
Description
Technical Field
The invention relates to the technical field of automatic software monitoring of power systems, in particular to a method for realizing assembling power application software based on a QML (quality metric language) technology.
Background
In the field of automatic monitoring of power systems, computer software is widely applied, wherein software developed by c/c + + language accounts for most of the software, and the advantage of using c/c + + development is that the language is easy to understand, high in execution efficiency, full in hardware resource utilization and capable of being transplanted on various hardware platforms. However, there is a requirement for c/c + +, that is, a program must be compiled to produce executable code before being run on a target machine, which has a direct effect that any modification to c + + software needs to be recompiled and deployed before being run again. The modifications comprise software bug correction and function increase, and are inevitable in the development and use process of application software. The current method for solving the problem is to modularize software, develop and deploy the software by adopting a main program and a dynamic library, and communicate among modules through a pre-designed interface.
In the process of implementing the invention, the inventor finds that the prior art at least has the mode of modularizing software and adding a dynamic library into a main program, thereby solving the problem to a certain extent. If a change happens to be in one or more modules forming the software, only the relevant modules are modified, and then recompilation is carried out to replace the modules. However, most of the modifications we encounter are beyond this limit, involving not only several modules but also interfaces between modules, which results in that the changes cannot be limited to a small range, and the changes can spread to a larger range through the changes of the interfaces, resulting in an increase of the parts that need to be compiled for replacement. Not only increases the work, but also increases the risk after the software update.
Disclosure of Invention
The present invention aims to provide a method for implementing an assembled power application software based on the QML technology to dynamically expand the attributes of power devices in software, and to associate the device attributes with new function modules based on the QML technology, so as to achieve the effect of expanding functions without changing the source program.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for realizing assembled electric power application software based on QML technology mainly comprises the following steps:
step 1: realizing dynamic expansion of the attribute describing the power equipment;
step 2: and (3) associating a specific function expansion module for the attribute of the power equipment expanded in the step (1).
Further, the step 1 comprises:
step 11: constructing a universal class description for all the electric power equipment, and stabilizing a part written by a specific language of the computer software of the electric power system;
step 12: one QML file is created for each power device, and different attributes of all power devices are placed into the respective QML files.
Further, in step 11, the generic classes include a method addDynamicPro () for recording the attributes QML file to be loaded QML, a method loadQml () for reading the QML file, a method propertydecs () for parsing the QML file and registering the attributes recorded therein into the device description class, which constitutes a method addDynamicPro () for describing a unique device and a method propertyDescs () for generating chinese explanations for various attributes.
Further, the step 2 comprises:
step 21: establishing a functional module ModelPlugin, loading dynamic attributes through a QML file and registering the dynamic attributes, and registering an external interface type ModelInterface of the functional module ModelPlugin as an object which can be directly used by the QML file, so that all methods for directly using the external interface type ModelInterface in any QML file are realized;
step 22: the ModelPlugin of the functional module is associated with the newly added dynamic attribute of the equipment, so that the purpose of expanding the software function is achieved;
step 23: in the electrical equipment class of the main program, a QML file with the same name of dynamic property is loaded, then a method of the QML object is used for calling a function invokeMethod (), and an interface function interfaceFunc () disclosed to the main program in the QML file is directly called, so that the association between the main program and the extended function module is realized through the QML file without modifying the main program.
Further, the method for loading and registering dynamic attributes through QML files in step 21 includes the following steps:
step 211: judging whether the QML file pointed by the qmlurl exists, if so, executing a step 212, otherwise, ending the loading and registering process;
step 212: checking the format of the QML file through a QML engine, converting the QML file into an object in a memory, if the conversion is successful, executing a step 213, otherwise, prompting a user that an error exists in the QML file, and ending the loading and registering process;
step 213: all attributes of the QML object are added into the power equipment object written by C + + one by one;
step 214: and setting Chinese notes for each new dynamic attribute, and ending the loading and registering process.
The method for realizing the assembled electric power application software based on the QML technology in the embodiments of the invention mainly comprises the following steps: realizing dynamic expansion of the attribute describing the power equipment; associating specific function extension modules for the attributes of the extended power equipment; therefore, the attribute of the electric power equipment in the dynamic extension software can be realized, the attribute of the electric power equipment is associated with the functional module, the association of the software and the newly added functional module is realized, and the effect of extending the function is achieved under the condition that the source program is not changed.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a partial relationship diagram of the C + + portion and QML of the power device software in the method for implementing the assembled power application software based on the QML technology according to the embodiment of the present invention;
fig. 2 is a diagram illustrating QML file loading and dynamic attribute registration processes in a method for implementing an assembled power application software based on QML technology according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Specifically, a method for implementing an assembled power application software based on QML technology mainly includes:
step 1: realizing dynamic expansion of the attribute describing the power equipment;
step 2: and (3) associating a specific function expansion module for the attribute of the power equipment expanded in the step (1).
Further, the step 1 comprises:
step 11: constructing a universal class description for all the electric power equipment, and stabilizing a part written by a specific language of the computer software of the electric power system;
step 12: one QML file is created for each power device, and different attributes of all power devices are placed into the respective QML files.
In step 11, the generic classes include a method addDynamicPro () for describing a unique device and a method propertyDescs () for generating chinese explanations for various attributes, which are used to record attributes QML files to be loaded QML, a method loadQml () for reading QML files, a method loadQml () for parsing QML files and registering the attributes recorded therein into the device description classes.
The step 2 comprises the following steps:
step 21: establishing a functional module ModelPlugin, and registering an external interface ModelInterface of the functional module ModelPlugin as an object which can be directly used by a QML (quality metric language) file through a QML file loading and dynamic attribute registration method, so that all methods for directly using the external interface ModelInterface in any QML file are realized;
step 22: the ModelPlugin of the functional module is associated with the newly added dynamic attribute of the equipment, so that the purpose of expanding the software function is achieved;
step 23: in the electrical equipment class of the main program, the same name QML file measyc.qml of the dynamic attribute is loaded, and then the invokeMethod () method of the QML object is used to directly call the interface func () method in the qml.qml, so that the association between the main program and the extended function module is realized through the QML file without modifying the main program.
The method for loading and registering dynamic attributes through a QML file in step 21 includes the following steps:
step 211: judging whether the QML file pointed by the qmlurl exists, if so, executing a step 212, otherwise, ending the loading and registering process;
step 212: checking the format of the QML file by the QML engine, converting the QML file into an object in a memory, if the conversion is successful, executing the step 213, otherwise, prompting a user that an error exists in the QML file, and ending the loading and registering processes;
step 213: all attributes of the QML object are added into the power equipment object written by C + + one by one;
step 214: and setting Chinese notes for each new dynamic attribute, and ending the loading and registering process.
In the method, the power application software still follows the modular design principle, but when the modules are assembled, the traditional interface design method is not used, but the connection between each functional module and the main program is designed based on the QML technology, and the connections do not need to be compiled. By applying the method, when the functional module is added to the software, the updating range can be effectively controlled.
To implement the power application software that can be assembled, two points need to be implemented: firstly, the power equipment described in the software can dynamically expand the attribute; and secondly, associating a specific extension module for the new attribute. The method realizes the two points as follows.
(1) Dynamically extending attributes of power devices
In order to stabilize the part written in C + + in the software, a universal class description is constructed for all power equipment; in order to reveal the different properties of various devices, an qml file is established for each device, and the different properties of the devices are put into respective qml files. Thus, no matter what kind of attribute is added to the device later, the part written in C + + does not need to be changed, and only the corresponding attribute needs to be added to the qml file of the device.
The relationship between the C + + portion and the qml portion in the software is shown in fig. 1. In FIG. 1, there is an important attribute in the generic description class: qmlurl, and three important methods: loadQml (), addDynamicPro () and propertyDescs (). The attribute qmlurl is used for recording qml files needing to be loaded; method loadQml () is used to read qml files; the method addDynamicPro () is used for analyzing qml files and registering the attributes recorded in the files into the device description class, so that a description of unique devices can be formed; since all English characters are used in the programming process, we use the method propertyDescs () to generate Chinese explanations for various attributes, which is convenient for Chinese users to use. The entire qml file loading and dynamic attribute registration process is illustrated in figure 2,
(2) dynamic attribute association extension module
The first part of the method realizes the function of dynamically adding attributes to the power equipment, but only adding some attributes is not enough, and the software expansion is functional expansion, so the second part is realized as a new functional module related to the new attributes. To realize the function, the qml is used as a basis, and the specific steps are divided into three steps.
Firstly, a function module ModelPlugin is developed, and an external interface type ModelInterface of the ModelPlugin is registered as an object which can be directly used by qml files through a plug-in registration method provided by qml, so that all methods of the ModelInterface can be directly used in any qml file.
And secondly, associating the ModelPlugin with the newly added dynamic attribute of the equipment to achieve the purpose of expanding the software function. Here we take as an example the "telemetry" attribute of the transformer in fig. 1, which is a dynamic attribute defined in the qml file, and its unique flag is measyc, and this flag can be freely defined, and after the flag is determined, we create a qml file measyc. qml of the same name, and define an interface function interfaceFunc () that can be used by the main program, or the power device class, and the method provided by model interface can be arbitrarily called in the interfaceFunc (), so that the association between the measyc. qml file and the functional module modelplug is established.
Thirdly, loading a homonymous qml file measyc.qml of dynamic attributes in the electrical equipment class of the main program, and then directly calling an interfaceFunc () method in the measyc.qml by using an invokeMethod () method of a qml object, so that the association between the main program and the extended function module is realized through the qml file without modifying the main program at all.
Generally, interfaces between c + + software modules need to be designed in advance, and the interfaces are fixed inside the program or are part of the program. Any modifications, once an interface is involved, must be reproduced compiling all parts using and implementing the interface. The invention not only aims at the problem, extracts the interface from the c + + program and realizes the interface by the QML configuration file which does not need to be compiled, thereby reducing the influence of modification on the whole software as much as possible, and expanding the functions of the original software by using the method.
The innovation points of the invention are as follows:
(1) based on the qml technology, the attributes of the power equipment in the software are dynamically expanded.
(2) Based on the qml technique, device attributes are associated with the new function module.
(3) Based on (1) and (2), the association between the software and the newly added module is realized, and the effect of expanding the functions is achieved under the condition that the source program is not changed.
At least the following beneficial effects can be achieved: when partial functions of large-scale software need to be changed or functions are added, the method can avoid recompiling and deploying the whole software, and limits the change within a small range, thereby greatly reducing the operation risk after the change and improving the operation stability of the power system.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A method for realizing assembled electric power application software based on QML technology is characterized by comprising the following steps:
step 1: realizing dynamic expansion of the attribute describing the power equipment;
step 2: associating specific function extension modules for the attributes of the power equipment extended in the step 1;
the step 1 comprises the following steps:
step 11: constructing a universal class description for all the electric power equipment, and stabilizing a part written by a specific language of the computer software of the electric power system;
step 12: establishing a QML file for each type of electric power equipment, and placing different attributes of all the electric power equipment into the respective QML files;
in step 11, the generic classes include a method addDynamicPro () for recording the attributes QML files to be loaded, a method loadQml (), which is used to read the QML files, a method propertydecs () for parsing the QML files and registering the recorded attributes in the device description classes, so as to form a method addDynamicPro () for describing unique devices and a method propertyDescs (), which is used to generate chinese interpretations for various attributes;
the step 2 comprises the following steps:
step 21: establishing a functional module ModelPlugin, loading dynamic attributes through a QML file and registering the dynamic attributes, and registering an external interface type ModelInterface of the functional module ModelPlugin as an object which can be directly used by the QML file, so that all methods for directly using the external interface type ModelInterface in any QML file are realized;
step 22: the ModelPlugin of the functional module is associated with the newly added dynamic attribute of the equipment, so that the purpose of expanding the software function is achieved;
step 23: in the electrical equipment class of the main program, loading a QML file measyc.qml with the same name and dynamic attributes, then calling a function invokeMethod () by using a method of the QML object, and directly calling an interface function intrefactive () disclosed to the main program in the measyc.qml, thereby realizing the association between the main program and the extended function module through an QML file without modifying the main program;
the method for loading dynamic attributes through a QML file and registering the dynamic attributes in step 21 includes the following steps:
step 211: judging whether the QML file pointed by the qmlurl exists, if so, executing a step 212, otherwise, ending the loading and registering process;
step 212: checking the format of the QML file through a QML engine, converting the QML file into an object in a memory, if the conversion is successful, executing a step 213, otherwise, prompting a user that an error exists in the QML file, and ending the loading and registering process;
step 213: all attributes of the QML object are added into the power equipment object written by C + + one by one;
step 214: and setting Chinese notes for each new dynamic attribute, and ending the loading and registering process.
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| CN108491202A (en) * | 2018-03-15 | 2018-09-04 | 南京智格电力科技有限公司 | A kind of implementation method of the graphics engine based on QML |
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