CN110765209A - Data read-write processing method and device - Google Patents
Data read-write processing method and device Download PDFInfo
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Abstract
The embodiment of the invention provides a data read-write processing method and a device, wherein the method comprises the following steps: determining variables in a data table to be read, and reading all variables in the same data table as the data table to be read from a database; updating and storing current values corresponding to all variables in a shared memory; and after determining that the current value corresponding to the variable in the shared memory has write operation, updating the data table which is the same as the data table to be read according to the write value corresponding to the variable. Therefore, data interaction between the OPC UA Server and the SQL Server and between the OPC UA Server and the SQL database and between the OPC UA Server and the SQL Server and between the OPC UA Server and the MySQL database is realized, and an enterprise is helped to realize fusion of different levels of data in the same object. The method provides a low-cost and high-quality solution for data integration of a factory, and further provides an effective means for high-quality development of the manufacturing industry.
Description
Technical Field
The present invention relates to the field of data processing technologies, and in particular, to a data read-write processing method and apparatus.
Background
When an information model of an intelligent factory is established, fusion of bottom equipment state information and higher-level database data in the same object, namely reading and writing of data on the same data table, is often encountered. The database is typically a SQLServer, MySQL database.
In order to be suitable for the fusion of the state information of the bottom equipment and the data of a higher-level database in the same object, an OPC UA address space information model is designed based on a configuration file, can realize read-write operation with the data of MySQL and SQL Server databases, and can run in a Server of an X86 framework or an embedded equipment of an ARM platform.
However, the currently designed OPC UA address space information model cannot realize asynchronous operation of database reading and writing, and there is also a blockage of the OPC UA Server in the database operating process.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a data read-write processing method and device.
In a first aspect, the present invention provides a data read-write processing method, including:
determining variables in a data table to be read, and reading all variables in the same data table as the data table to be read from a database;
updating and storing current values corresponding to all variables in a shared memory;
and after determining that the current value corresponding to the variable in the shared memory has write operation, updating the data table which is the same as the data table to be read according to the write value corresponding to the variable.
Optionally, before determining the variable in the data table to be read, the method further includes:
determining the total length of read attribute variables and write attribute variables in a data table to be read according to a shared memory offset table, creating a shared memory, and finishing the initialization of a read data area and an FIFO (first in first out) write value queue in the shared memory;
constructing a first mapping relation in the shared memory according to a shared memory offset table, wherein the first mapping relation is a mapping relation between a variable name and address offset of a variable in the shared memory;
constructing a second mapping relation in the shared memory according to the database variable table, wherein the second mapping relation is the mapping relation between the variable name and the name of the database where the variable is located;
the shared memory offset table is an offset table sent by a model editor, and the database variable table is a variable table sent by a database.
Optionally, the updating and storing the current values corresponding to all the variables in the shared memory includes:
and updating the current values corresponding to all the variables into a read data area of the shared memory according to the first mapping relation, and rewriting corresponding zone bits in a read control area, wherein the read data area comprises the read data area and the read control area.
Optionally, after it is determined that there is a write operation on the current value corresponding to the variable in the shared memory, performing update processing in a data table that is the same as the data table to be read according to the write value corresponding to the variable, where the update processing includes:
and after determining that the length of the FIFO write value queue changes, acquiring a write value corresponding to a variable in the shared memory, and updating the write value into the same data table as the data table to be read according to a second mapping relation.
In a second aspect, an embodiment of the present invention provides a data read/write processing apparatus, including:
the reading operation module is used for determining variables in a data table to be read and reading all the variables in the same data table as the data table to be read from a database;
the updating module is used for updating and storing the current values corresponding to all the variables in the shared memory;
and the write operation module is used for updating the data table which is the same as the data table to be read according to the write value corresponding to the variable after determining that the current value corresponding to the variable in the shared memory has write operation.
Optionally, the system further comprises an initialization module, configured to:
determining the total length of read attribute variables and write attribute variables in a data table to be read according to a shared memory offset table, creating a shared memory, and finishing the initialization of a read data area and an FIFO (first in first out) write value queue in the shared memory;
constructing a first mapping relation in the shared memory according to a shared memory offset table, wherein the first mapping relation is a mapping relation between a variable name and address offset of a variable in the shared memory;
constructing a second mapping relation in the shared memory according to the database variable table, wherein the second mapping relation is the mapping relation between the variable name and the name of the database where the variable is located;
the shared memory offset table is an offset table sent by a model editor, and the database variable table is a variable table sent by a database.
Optionally, the update module is specifically configured to:
and updating the current values corresponding to all the variables into a read data area of the shared memory according to the first mapping relation, and rewriting corresponding zone bits in a read control area, wherein the read data area comprises the read data area and the read control area.
Optionally, the write operation module is specifically configured to:
and after determining that the length of the FIFO write value queue changes, acquiring a write value corresponding to a variable in the shared memory, and updating the write value into the same data table as the data table to be read according to a second mapping relation.
The data read-write processing method provided by the embodiment of the invention reads all variables in the same data table as the data table to be read from the database by setting the database operation middleware, updates and stores the current values corresponding to all the variables in the shared memory, and updates and processes the data table as the same as the data table to be read according to the written values corresponding to the variables after determining that the current values corresponding to the variables in the shared memory have write operation, thereby realizing data interaction between the OPC UA Server and the SQL Server as well as the MySQL database and helping enterprises realize the fusion of different levels of data in the same object. The method provides a low-cost and high-quality solution for data integration of a factory, and further provides an effective means for high-quality development of the manufacturing industry.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a data read-write processing method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a network topology provided by an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a read data area according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a FIFO write value queue according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a data read/write processing apparatus according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Fig. 1 shows a schematic flow chart of a data read-write processing method according to an embodiment of the present invention, and as can be seen from fig. 1, the method includes:
s11, determining variables in a data table to be read, and reading all variables in the same data table as the data table to be read from a database;
s12, updating and storing the current values corresponding to all the variables in the shared memory;
and S13, after determining that the current value corresponding to the variable in the shared memory has write operation, updating the data table to be read according to the write value corresponding to the variable.
With respect to the above steps S11-S13, it should be noted that, in the embodiment of the present invention, fusion of the state information of the underlying device and the data of the higher-level database in the same object, i.e. reading and writing of data on the same data table, is often encountered when the information model of the smart factory is established. The database is typically a SQL Server, MySQL database.
In order to be suitable for the fusion of the state information of the bottom equipment and the data of a higher-level database in the same object, an OPC UA address space information model is designed based on a configuration file, can realize read-write operation with the data of MySQL and SQL Server databases, and can run in a Server of an X86 framework or an embedded equipment of an ARM platform.
However, the currently designed OPC UA address space information model cannot realize asynchronous operation of database reading and writing, and there is also a blockage of the OPC UA Server in the database operating process.
In order to realize the asynchronous operation of database read-write, and simultaneously avoid the blocking of OPC UA Server by the database operation process. Fig. 2 is a schematic diagram of a network topology according to an embodiment of the present invention. As can be seen from FIG. 2, the method can set a database operation middleware, which is a virtual device, can provide an independent process, operate on the workstation of the backbone control network, and can also form a system with the simulation editor and the OPC UA Server, access the SQL Server and the MySQL database through the LAN, and provide the data read-write operation function in the form of c/. h, to implement the operation of the OPCUA Server operating in the same operating system on the data in the database.
The database operation middleware determines variables in a data table to be read, reads all variables in the data table which is the same as the data table to be read from a database (SQL Server, MySQL database), then updates and stores current values corresponding to all the variables in a shared memory, and updates and processes the data table which is the same as the data table to be read according to write values corresponding to the variables after determining that the current values corresponding to the variables in the shared memory have write operation.
The data read-write processing method provided by the embodiment of the invention reads all variables in the same data table as the data table to be read from the database by setting the database operation middleware, updates and stores the current values corresponding to all the variables in the shared memory, and updates and processes the data table as the same as the data table to be read according to the written values corresponding to the variables after determining that the current values corresponding to the variables in the shared memory have write operation, thereby realizing data interaction between the OPC UA Server and the SQL Server as well as the MySQL database and helping enterprises realize the fusion of different levels of data in the same object. The method provides a low-cost and high-quality solution for data integration of a factory, and further provides an effective means for high-quality development of the manufacturing industry.
In a further embodiment of the foregoing embodiment, before determining the variable in the data table to be read, the method further includes:
and the database operation middleware determines the total length of the read attribute variables and the write attribute variables in the data table to be read according to the shared memory offset table sent by the model editor, creates a shared memory, and completes the initialization of a read data area and an FIFO (first in first out) write value queue in the shared memory. Fig. 3 is a schematic diagram illustrating a structure of a read data area according to an embodiment of the present invention, and fig. 4 is a schematic diagram illustrating a structure of a FIFO write value queue according to an embodiment of the present invention.
Constructing a first mapping relation in the shared memory according to a shared memory offset table, wherein the first mapping relation is a mapping relation between a variable name and address offset of a variable in the shared memory;
and constructing a second mapping relation in the shared memory according to a database variable table sent by the database, wherein the second mapping relation is the mapping relation between the variable name and the name of the database where the variable is located.
In a further embodiment of the foregoing embodiment, the database operation middleware updates current values corresponding to all variables into a read data area of the shared memory according to the first mapping relationship, and rewrites corresponding flag bits in a read control area, where the read data area includes the read data area and the read control area.
In this embodiment, the database operation middleware reads all variables in the same data table in the database by taking the data table in the database as a unit according to the identified variable that needs to be read periodically from the database, queries the first mapping relationship, updates the read latest value to the "read data area" of the shared memory, and rewrites the corresponding flag bit in the "read control area".
In the embodiment of the invention, the OPC UA Server can read the variables in the data table from the shared memory according to the variable reading interface.
In a further embodiment of the foregoing embodiment, if the OPC UA Server performs a write operation on a variable, after determining that the length of the FIFO write value queue changes, the OPC UA Server obtains a write value corresponding to the variable in the shared memory, and updates the write value to a data table that is the same as the data table to be read according to the second mapping relationship.
The data read-write processing method provided by the embodiment of the invention establishes a connection bridge between the OPC UA Server and the database by setting a database operation middleware, reads all variables in the same data table as the data table to be read from the database, updates and stores current values corresponding to all the variables in a shared memory, and updates and processes the current values in the same data table as the data table to be read according to write values corresponding to the variables after determining that the current values corresponding to the variables in the shared memory have write operation, thereby realizing data interaction between the OPC UA Server and the SQL Server and realizing the fusion of different levels of data in the same object by enterprises. The method provides a low-cost and high-quality solution for data integration of a factory, and further provides an effective means for high-quality development of the manufacturing industry.
Fig. 5 shows a data read-write processing apparatus according to an embodiment of the present invention, which includes a read operation module 41, an update module 42, and a write operation module 43, where:
the read operation module 41 is configured to determine a variable in a data table to be read, and read all variables in the same data table as the data table to be read from a database;
the updating module 42 is configured to update and store current values corresponding to all variables in the shared memory;
and the write operation module 43 is configured to, after determining that there is a write operation on the current value corresponding to the variable in the shared memory, perform update processing in a data table that is the same as the data table to be read according to the write value corresponding to the variable.
In a further embodiment, the method further comprises an initialization module configured to:
determining the total length of read attribute variables and write attribute variables in a data table to be read according to a shared memory offset table, creating a shared memory, and finishing the initialization of a read data area and an FIFO (first in first out) write value queue in the shared memory;
constructing a first mapping relation in the shared memory according to a shared memory offset table, wherein the first mapping relation is a mapping relation between a variable name and address offset of a variable in the shared memory;
constructing a second mapping relation in the shared memory according to the database variable table, wherein the second mapping relation is the mapping relation between the variable name and the name of the database where the variable is located;
the shared memory offset table is an offset table sent by a model editor, and the database variable table is a variable table sent by a database.
In a further embodiment, the update module is specifically configured to:
and updating the current values corresponding to all the variables into a read data area of the shared memory according to the first mapping relation, and rewriting corresponding zone bits in a read control area, wherein the read data area comprises the read data area and the read control area.
In a further embodiment, the write operation module is specifically configured to:
and after determining that the length of the FIFO write value queue changes, acquiring a write value corresponding to a variable in the shared memory, and updating the write value into the same data table as the data table to be read according to a second mapping relation.
Since the principle of the apparatus according to the embodiment of the present invention is the same as that of the method according to the above embodiment, further details are not described herein for further explanation.
It should be noted that, in the embodiment of the present invention, the relevant functional unit may be implemented by a hardware processor (hardware processor).
The data read-write processing device provided by the embodiment of the invention establishes a connection bridge between the OPC UA Server and the database by setting a database operation middleware, reads all variables in the same data table as the data table to be read from the database, updates and stores current values corresponding to all the variables in the shared memory, and updates and processes the current values in the same data table as the data table to be read according to write values corresponding to the variables after determining that the current values corresponding to the variables in the shared memory have write operation, thereby realizing data interaction between the OPC UA Server and the SQL Server and realizing the fusion of different levels of data in the same object by enterprises. The method provides a low-cost and high-quality solution for data integration of a factory, and further provides an effective means for high-quality development of the manufacturing industry.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (8)
1. A data read-write processing method is characterized by comprising the following steps:
determining variables in a data table to be read, and reading all variables in the same data table as the data table to be read from a database;
updating and storing current values corresponding to all variables in a shared memory;
and after determining that the current value corresponding to the variable in the shared memory has write operation, updating the data table which is the same as the data table to be read according to the write value corresponding to the variable.
2. The data read-write processing method according to claim 1, before determining the variable in the data table to be read, further comprising:
determining the total length of read attribute variables and write attribute variables in a data table to be read according to a shared memory offset table, creating a shared memory, and finishing the initialization of a read data area and an FIFO (first in first out) write value queue in the shared memory;
constructing a first mapping relation in the shared memory according to a shared memory offset table, wherein the first mapping relation is a mapping relation between a variable name and address offset of a variable in the shared memory;
constructing a second mapping relation in the shared memory according to the database variable table, wherein the second mapping relation is the mapping relation between the variable name and the name of the database where the variable is located;
the shared memory offset table is an offset table sent by a model editor, and the database variable table is a variable table sent by a database.
3. The data read-write processing method according to claim 2, wherein the updating and storing the current values corresponding to all variables in the shared memory includes:
and updating the current values corresponding to all the variables into a read data area of the shared memory according to the first mapping relation, and rewriting corresponding zone bits in a read control area, wherein the read data area comprises the read data area and the read control area.
4. The data read-write processing method according to claim 3, wherein after determining that there is a write operation on the current value corresponding to the variable in the shared memory, performing update processing in a data table that is the same as the data table to be read according to the write value corresponding to the variable, includes:
and after determining that the length of the FIFO write value queue changes, acquiring a write value corresponding to a variable in the shared memory, and updating the write value into the same data table as the data table to be read according to a second mapping relation.
5. A data read/write processing apparatus, comprising:
the reading operation module is used for determining variables in a data table to be read and reading all the variables in the same data table as the data table to be read from a database;
the updating module is used for updating and storing the current values corresponding to all the variables in the shared memory;
and the write operation module is used for updating the data table which is the same as the data table to be read according to the write value corresponding to the variable after determining that the current value corresponding to the variable in the shared memory has write operation.
6. A data read-write processing apparatus according to claim 5, further comprising an initialization module configured to:
determining the total length of read attribute variables and write attribute variables in a data table to be read according to a shared memory offset table, creating a shared memory, and finishing the initialization of a read data area and an FIFO (first in first out) write value queue in the shared memory;
constructing a first mapping relation in the shared memory according to a shared memory offset table, wherein the first mapping relation is a mapping relation between a variable name and address offset of a variable in the shared memory;
constructing a second mapping relation in the shared memory according to the database variable table, wherein the second mapping relation is the mapping relation between the variable name and the name of the database where the variable is located;
the shared memory offset table is an offset table sent by a model editor, and the database variable table is a variable table sent by a database.
7. The data read-write processing device according to claim 6, wherein the update module is specifically configured to:
and updating the current values corresponding to all the variables into a read data area of the shared memory according to the first mapping relation, and rewriting corresponding zone bits in a read control area, wherein the read data area comprises the read data area and the read control area.
8. The data read-write processing device according to claim 7, wherein the write operation module is specifically configured to:
and after determining that the length of the FIFO write value queue changes, acquiring a write value corresponding to a variable in the shared memory, and updating the write value into the same data table as the data table to be read according to a second mapping relation.
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| CN108062253A (en) * | 2017-12-11 | 2018-05-22 | 北京奇虎科技有限公司 | The communication means of a kind of kernel state and User space, device and terminal |
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