CN114040018A - Data receiving and transmitting method and device based on JSON data format - Google Patents
Data receiving and transmitting method and device based on JSON data format Download PDFInfo
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- 238000004891 communication Methods 0.000 claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 238000007726 management method Methods 0.000 claims description 13
- 238000013506 data mapping Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000007405 data analysis Methods 0.000 claims description 4
- 238000013507 mapping Methods 0.000 claims description 3
- 230000011664 signaling Effects 0.000 claims description 3
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- 230000002452 interceptive effect Effects 0.000 abstract description 3
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- 238000007906 compression Methods 0.000 description 3
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- 230000006837 decompression Effects 0.000 description 2
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- G—PHYSICS
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
Abstract
The invention relates to a data receiving and transmitting method and a device based on JSON data format, which encapsulates application service data required by different protocols accessed to a communication manager into different objects according to JSON data format according to the standard requirements of the different protocols on various information, and converts the complex data structure of the objects into JSON format character strings through an interface function provided by a JSON library, thereby realizing the unified management of the data receiving and transmitting of the communication manager. The invention fully utilizes the advantages of JSON data format, encapsulates the message structures of different information (such as four remote) in the current different protocols into the lightweight JSON data format in advance according to a uniform, concise and convenient mode for interactive processing, users and engineering personnel face JSON format data with self-description, the data content is clear and convenient for analysis and reading, and the network transmission efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of data transmission of power systems, in particular to a data receiving and transmitting method and device based on a JSON data format.
Background
The diversification problems of communication modes and communication protocols in the existing electric power communication management machine exist all the time, and the problems that the quantity of data is large, the information is large, the receiving frequency is high, a large amount of memory resources are occupied in the analyzing and forwarding process and the thread processing time is occupied in the transmission of the common four-remote information, information blockage is easily caused, and the business process is easily processed without the preset priority. Meanwhile, engineering technicians need to invest a great deal of time and energy to master the interconnection communication and protocol specifications among heterogeneous systems, the data contents of different protocols are difficult to understand and are not intuitive, and the corresponding specifications need to be analyzed by means of different tools, so that the problem is not easy to quickly position; the expansibility of the personalized protocol is not strong, the processing logic and flow of the code need to be increased again, and the customization requirement cannot be met quickly.
Disclosure of Invention
Based on the above situation in the prior art, an object of the present invention is to provide a data transceiving method and apparatus based on JSON data format, which encapsulate application service data required by different protocols accessing a communication manager into different objects according to JSON data format according to specification requirements for various types of information in the different protocols, and convert a complex data structure of the object into a JSON format character string through an interface function provided by a JSON library, thereby implementing unified management of data transceiving of the communication manager.
In order to achieve the above object, according to an aspect of the present invention, there is provided a data transmission method based on JSON data format, including the steps of:
the power communication management machine acquires source data to be sent;
analyzing the source data, and converting the source data into data in a JSON data format according to a JSON data mapping relation;
and converting the data in the JSON data format into a JSON sending character string, and sending the JSON sending character string to a message queue.
Further, the JSON data mapping relationship includes mapping relationships between different protocols and message types and the JSON general structure model.
Further, the JSON universal structure model includes a protocol name, a packet type identifier, a packet data length, a packet data value structure, and a packet data check value.
Further, the specifications include a 101 specification, a 103 specification, and a 104 specification.
Further, the message types include remote signaling, remote measuring, remote controlling, remote adjusting, time setting, SOE and electric degree.
Further, the message data value structure includes a data value number, a data value name, a data quantity value, and a data expansion reserved bit.
Further, the sending further includes:
and if the length of the JSON sending character string to be sent is greater than a preset first length threshold, compressing the JSON sending character string.
According to a second aspect of the present invention, there is provided a data receiving method based on JSON data format, comprising the steps of:
a data receiving party receives a message queue sent by the power communication management machine;
acquiring a message identifier in the message queue, judging whether the message identifier is an effective message in a JSON data format or not according to the message identifier, and if so, performing the next step; if not, the data is put into a cache;
judging whether the data length of the message queue is greater than a preset second length threshold value or not, and if so, decompressing the message queue; if not, the next step is carried out;
and performing display processing on the received data.
According to a third aspect of the present invention, a data sending device based on JSON data format is provided, where the data sending device is disposed at an electric power communication manager, and includes a source data obtaining module, a source data parsing module, and a data conversion module; wherein the content of the first and second substances,
the source data acquisition module is used for acquiring source data to be sent;
the source data analysis module is used for analyzing the source data and converting the source data into data in a JSON data format according to a JSON data mapping relation;
and the data conversion module is used for converting the data in the JSON data format into a JSON sending character string and sending the JSON sending character string to a message queue.
According to a fourth aspect of the present invention, a data receiving apparatus based on JSON data format is provided, the data receiving apparatus is disposed at a data receiving end, and is characterized by comprising a message queue receiving module, a message identifier determining module, a data length determining module, and a data display processing module;
the message queue receiving module is used for receiving a message queue sent by the power communication management machine;
the message identifier judging module is used for acquiring the message identifier in the message queue and judging whether the message identifier is an effective message in a JSON data format or not according to the message identifier;
the data length judging module is used for judging whether the data length of the message queue is greater than a preset second length threshold value or not when the message queue is an effective message in a JSON data format;
the data display processing module is used for displaying the received data.
In summary, the present invention provides a data transceiving method and device based on JSON data format, which encapsulates the required application service data into different objects according to the JSON data format according to the specification requirements for various types of information in different protocols for different protocols accessing to the communication manager, and converts the complex data structure of the object into the JSON format character string through the interface function provided by the JSON library, thereby implementing the unified management of data transceiving of the communication manager. The invention adopts JSON data format to transmit and receive data, and has the following advantages:
(1) JSON is used as a lightweight data exchange format, is completely independent of a text format of a language, has simple data format, is easy to read and write, has visible information, is compressed in format and occupies small bandwidth;
(2) the object, array and the like of the client can be directly generated into a JSON format, so that the client can conveniently request the generation of data information;
(3) the JSON data format inherits the C language programming habit, supports various server end languages, can be directly used for server end codes, and is convenient for the server end to analyze;
(4) the universality is strong, almost all new systems support, the code development amount of a server and a client is greatly simplified, and the maintenance is easy;
(5) historical protocols may be backwards compatible out of the field order relationship, e.g., the first defined protocol has field A, B, the server is upgraded later, upgrade add support C, D, and old clients may coexist with new clients.
The invention fully utilizes the advantages of the JSON data format, encapsulates the message structures of different information (such as four remote) in the current different protocols into the lightweight JSON data format in advance according to a uniform, concise and convenient mode for interactive processing, users and engineering personnel face JSON format data with self-description, the data content is clear and convenient for analysis and reading, and the network transmission efficiency is greatly improved.
Drawings
FIG. 1 is a flow chart of a data transmission method based on JSON data format according to the present invention;
fig. 2 is a flow chart of a data receiving method based on JSON data format in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. According to an embodiment of the present invention, a data transmission method based on JSON data format is provided, and a flowchart of the method is shown in fig. 1, and includes the following steps:
the power communication management machine acquires source data to be sent.
And analyzing the source data, and converting the source data into data in a JSON data format according to a JSON data mapping relation, wherein a fixed message identifier is placed at the front end of a data message, and the fixed message identifier occupies 5 bytes, such as EB 99EB 9945. The JSON data mapping relation comprises a mapping relation between different protocols and message types and a JSON general structure model, for example, telemetry in 104 protocols corresponds to a JSON _ yc general structure template; 104, corresponding to json _ yx general structure template. The JSON general structure model comprises a protocol name, a message type identifier, a message data length, a message data value structure, a message data check value and the like; the related protocols comprise the types of the commonly used protocols of the power system, such as a 101 protocol, a 103 protocol, a 104 protocol and the like, and can also comprise custom protocol protocols; the related message types comprise remote signaling, remote measuring, remote controlling, remote adjusting, time setting, SOE, electric degree and other message types; the related message data value structure comprises the number of data values, the name of the data value, the data quantity value, the data expansion reserved bit and the like. In the step, a universal data format is defined for data types under different protocols by using the compatibility of the JSON format, and a data receiving party can clearly know the content of each data according to the description in the JSON. Keywords can be predefined in advance for various message types in different conventions, for example, "protocol _ type" represents a convention name; "value _ ident" indicates a packet type, and "value _ type" indicates a packet type identifier. The contents in different keywords can be enumerated in an enumerated value form, so that the expanded use is facilitated. The following is a specific example: taking the remote measurement value as an example, an object obj has the following effective data part content:
var obj＝
{ "protocol _ type": 104' (representing the 104 specification), "value _ ident":9 (representing the message type, such as telemetry),
"value _ type": telemetric '(representing a message type identifier such as a telemetry identifier), "value _ num":100 (representing the number of data), "value _ num _1_ addr": 0x4001' (representing the address of the first data), "value _ num _1_ cval ': 200.0' (representing the value of the first data)," value _ num _1_ q ': 00' (representing the quality of the first data), "value _ num _2_ addr": 0x4002 '(representing the address of the second data), "value _ num _2_ cval': 300.0 '(representing the value of the second data)," value _ num _2_ c': 01 '(representing the quality of the second data), "value _ num _2_ q': FC _ check message (representing the value of FC) } data.
And converting the data in the JSON data format into a JSON sending character string, and sending the JSON sending character string to a message queue. After the object of each kind of information is converted into a JSON sending character string, the JSON sending character string is cached in a data buffer, and related starting characters, frame lengths, check codes, end symbol identifications and the like are automatically added before and after the data buffer before data packing and sending.
If the amount of the service data required to be transmitted is large, the data can be compressed or decompressed. The method can also comprise the following steps: and if the length of the JSON sending character string to be sent is greater than a preset first length threshold, compressing the JSON sending character string. In this embodiment, for example, a gzip method is used to compress and decompress data, gzip is a common mature compression algorithm, and corresponding software may be installed on different platforms, and its command is directly invoked when a gzip operation is executed. Since the data in this embodiment is finally converted into a JSON format string, the gzip compression and decompression process is described by taking the string as an example. The step of gzip compressing the character string comprises:
s1, creating a new byte array output stream;
s2, creating a new output stream object by using the size of the default buffer area, and associating the new output stream object to the byte array output stream;
s3, starting a write command of the output stream object, and writing the received valid data into a buffer area by taking bytes as units;
s4, converting the buffer content into character strings through decoding bytes and putting the character strings into an array output stream;
and S5, closing all input and output flows.
According to a second embodiment of the present invention, there is provided a data receiving method based on JSON data format, the flow chart of the method is shown in fig. 2, and the method includes the following steps:
and the data receiving party receives the message queue sent by the power communication management machine. The data receiving party is, for example, a server or a device, and includes a telecontrol master station, a monitoring master station, a front-end processor, and the like.
Acquiring a message identifier in the message queue, judging whether the message identifier is an effective message in a JSON data format or not according to the message identifier, and if so, performing the next step; if not, the data is put into a cache. The message identifier is fixedly arranged at the front end of the data message and fixedly occupies 5 bytes, such as EB 99EB 9945.
Because the character strings in the JSON format are transmitted between the networks or programs, after receiving the data, the receiver can analyze the data one by one according to the character string content and the JSON data syntax format. As an example of the JSON object obj created by telemetry, the data receiver converts into a string by JSON.
Var obj { "protocol _ type": 104', "value _ ident":9 (representing telemetry), "value _ type": telemetry ', "value _ num ': 100," value _ num _1_ addr ': 0x4001', "value _ num _1_ cval ': 200.0'," value _ num _1_ q ': 00', "value _ num _2_ addr ': 0x4002'," value _ num _2_ cval ': 200.0', "value _ num _2_ q ': 01', '01' };
due to the self-contained parsing mode of the JSONObject system, a receiver can directly use the JSONObject (class of the system) to parse and read related keywords and values for use.
Judging whether the data length of the message queue is greater than a preset second length threshold value or not, and if so, decompressing the message queue; if not, the next step is carried out. Similarly, when the received data is long, the data can be decompressed by gzip decompression similar to the compression. The step of gzip decompressing the character string comprises:
s1, creating a new byte array output stream;
s2, creating a byte array input stream to store received data;
s3, creating an input stream object and associating the input stream object with the byte array input stream;
s4, starting a read command of the input stream object, and reading the input stream of the byte array into a buffer zone;
s5, converting the buffer content into character strings through decoding bytes and putting the character strings into an array output stream;
and S6, closing all input and output flows.
And performing display processing on the received data.
According to the embodiment provided by the invention, in the data transmission process, all data are converted into the JSON format and transmitted in the form of text, namely character strings, and the format can be kept unchanged.
According to a third embodiment of the present invention, a data transmission device based on JSON data format is provided, where the data transmission device is disposed at a power communication manager, and includes a source data acquisition module, a source data parsing module, and a data conversion module; wherein the content of the first and second substances,
the source data acquisition module is used for acquiring source data to be sent;
the source data analysis module is used for analyzing the source data and converting the source data into data in a JSON data format according to a JSON data mapping relation;
and the data conversion module is used for converting the data in the JSON data format into a JSON sending character string and sending the JSON sending character string to a message queue.
According to a fourth embodiment of the present invention, a data receiving apparatus based on JSON data format is provided, the data receiving apparatus is disposed at a data receiving end, and is characterized by including a message queue receiving module, a message identifier determining module, a data length determining module, and a data display processing module;
the message queue receiving module is used for receiving a message queue sent by the power communication management machine;
the message identifier judging module is used for acquiring the message identifier in the message queue and judging whether the message identifier is an effective message in a JSON data format or not according to the message identifier;
the data length judging module is used for judging whether the data length of the message queue is greater than a preset second length threshold value or not when the message queue is an effective message in a JSON data format;
the data display processing module is used for displaying the received data.
The specific steps of the devices provided in the third and fourth embodiments for implementing the corresponding functions of each module are the same as those of the methods provided in the first and second embodiments of the present invention, and are not described herein again.
In summary, the present invention relates to a data transceiving method and apparatus based on JSON data format, which encapsulates application service data required by different protocols accessed to a communication manager into different objects according to the specification requirements for various types of information in the different protocols, and converts the complex data structure of the object into a JSON format character string by using an interface function provided by a JSON library, thereby implementing unified management of data transceiving of the communication manager. The invention fully utilizes the advantages of JSON data format, encapsulates the message structures of different information (such as four remote) in the current different protocols into the lightweight JSON data format in advance according to a uniform, concise and convenient mode for interactive processing, users and engineering personnel face JSON format data with self-description, the data content is clear and convenient for analysis and reading, and the network transmission efficiency is greatly improved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A data transmission method based on JSON data format is characterized by comprising the following steps:
the power communication management machine acquires source data to be sent;
analyzing the source data, and converting the source data into data in a JSON data format according to a JSON data mapping relation;
and converting the data in the JSON data format into a JSON sending character string, and sending the JSON sending character string to a message queue.
2. The method of claim 1, wherein the JSON data mapping comprises a mapping between different conventions and packet types and a JSON generic structure model.
3. The method of claim 2, wherein the JSON generic structure model includes a protocol name, a packet type identifier, a packet data length, a packet data value structure, and a packet data check value.
4. The method of claim 3, wherein the specifications comprise a 101 specification, a 103 specification, and a 104 specification.
5. The method of claim 4, wherein the message types include remote signaling, telemetry, remote control, remote tuning, time synchronization, SOE, and electrical degrees.
6. The method of claim 5, wherein the message data value structure comprises a number of data values, a data value name, a data magnitude value, and a data extension reserved bit.
7. The method of claim 6, wherein the sending further comprises:
and if the length of the JSON sending character string to be sent is greater than a preset first length threshold, compressing the JSON sending character string.
8. A data receiving method based on JSON data format is characterized by comprising the following steps:
a data receiving party receives a message queue sent by the power communication management machine;
acquiring a message identifier in the message queue, judging whether the message identifier is an effective message in a JSON data format or not according to the message identifier, and if so, performing the next step; if not, the data is put into a cache;
judging whether the data length of the message queue is greater than a preset second length threshold value or not, and if so, decompressing the message queue; if not, the next step is carried out;
and performing display processing on the received data.
9. A data sending device based on JSON data format is arranged at a power communication manager and is characterized by comprising a source data acquisition module, a source data analysis module and a data conversion module; wherein the content of the first and second substances,
the source data acquisition module is used for acquiring source data to be sent;
the source data analysis module is used for analyzing the source data and converting the source data into data in a JSON data format according to a JSON data mapping relation;
and the data conversion module is used for converting the data in the JSON data format into a JSON sending character string and sending the JSON sending character string to a message queue.
10. A data receiving device based on JSON data format is arranged at a data receiving end and is characterized by comprising a message queue receiving module, a message identification judging module, a data length judging module and a data display processing module;
the message queue receiving module is used for receiving a message queue sent by the power communication management machine;
the message identifier judging module is used for acquiring the message identifier in the message queue and judging whether the message identifier is an effective message in a JSON data format or not according to the message identifier;
the data length judging module is used for judging whether the data length of the message queue is greater than a preset second length threshold value or not when the message queue is an effective message in a JSON data format;
the data display processing module is used for displaying the received data.
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