CN107995176B - SCADA system picture cache system - Google Patents
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- CN107995176B CN107995176B CN201711203883.6A CN201711203883A CN107995176B CN 107995176 B CN107995176 B CN 107995176B CN 201711203883 A CN201711203883 A CN 201711203883A CN 107995176 B CN107995176 B CN 107995176B
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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
- H04L67/561—Adding application-functional data or data for application control, e.g. adding metadata
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/70—Information retrieval; Database structures therefor; File system structures therefor of video data
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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
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- H—ELECTRICITY
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- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
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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
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
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Abstract
The invention discloses a SCADA system picture cache system, which comprises a server-side data query module, a server-side cache update module, a client-side cache module, a server-side picture processing main program module and a client-side picture processing module. In an actual service system, when a dispatcher selects to call a picture in a client-side HMI (human machine interface), the dispatcher searches for data required by matching in a client-side cache module and a server cache module, and when the cache data exists and is available, the client-side HMI can directly use the cache data to achieve the purpose of quickly calling the picture, so that the waiting time for calling the picture is reduced.
Description
Technical Field
The invention relates to the field of SCADA (supervisory control and data acquisition) systems, in particular to a picture caching system of an SCADA system.
Background
The SCADA system, i.e., a data acquisition and monitoring control system, is widely applied to a plurality of fields such as data acquisition and monitoring control in the fields of electric power, metallurgy, petroleum, chemical industry, gas, railways, and the like.
The real-time picture module is used as an important part of the SCADA system and is used for monitoring the operation condition of the service system in real time. In the SCADA system, the content of a real-time picture is configured by a configuration tool and then is stored in a background database, and the configuration content comprises two parts, namely primitive information and data binding.
In general, the SCADA dispatcher selects a call screen in the client HMI to be completely displayed in the HMI, and the whole call processing process is as follows: 1) the client receives user operation and sends the requested picture Id to a background server side picture processing program; 2) the server side picture processing program acquires and analyzes a picture configuration file from the real-time library through a data interface; 3) the server side picture processing program reads the real-time value of the data object bound by the picture from the real-time library through the data interface; 4) the server side picture processing program sends the picture configuration information and the real-time data to the client side picture processing module; 5) the client side picture processing module creates a picture element and a rendering generation canvas according to the picture configuration information, and displays the picture element and the rendering generation canvas in a picture window; 6) and the client picture processing module updates picture primitives according to the picture real-time data.
In order to ensure the real-time performance of a service system, each industry has strict requirements on the calling time of a picture. In practical application, however, with the continuous complication of a service system, more and more primitives and data information are contained in a single picture, so that the time for analyzing picture content, acquiring real-time picture data and rendering canvas is greatly prolonged; on the other hand, with the prevalence of the B/S architecture, program execution efficiency in a web environment is significantly reduced compared to the C/S architecture. For two reasons, in practical applications, the screen calling time often cannot meet the requirements of the specification file.
Disclosure of Invention
Aiming at the problems in the two aspects in the prior art, the invention discloses a SCADA system picture cache system which can greatly accelerate the picture calling speed of a SCADA system (especially a B/S architecture SCADA system).
In order to achieve the purpose of the invention, the invention adopts the technical scheme that: a SCADA system picture cache system is characterized in that: the system comprises a server side data query module, a server side cache update module, a client side cache module, a server side picture processing main program module and a client side picture processing module.
The server data query module is used for realizing query processing of the picture data, and comprises: acquiring picture configuration information from a real-time library according to the picture Id; verifying the configuration by using a verification algorithm and generating a picture verification code; and acquiring real-time values of all data objects bound in the picture information from the real-time library as picture real-time data.
The server-side cache module resides in the server, the cache module is used for storing the image information in the server background, and each image storage information comprises: a picture Id; picture configuration information; a picture check code; and (5) real-time data of pictures.
And the server side cache updating module is used for updating the data of the picture object in the server side cache module in real time. Specifically, the method comprises the following steps: monitoring real-time changes of the data objects bound in the picture information in real time, and updating the latest real-time value to a server-side cache module when the data changes each time; and monitoring the configuration modification of the user in real time, and when any picture in the cache module at the server end is subjected to configuration modification, acquiring the latest configuration information, the latest picture check code and the latest picture real-time data of the picture through the server data query module, and updating the latest configuration information, the latest picture check code and the latest picture real-time data to the cache module at the server end.
The server side picture processing main program module resides in the server and is in communication connection with the client side picture processing module, and is used for realizing that: receiving a picture request from a client; organizing the return data according to the request parameters; and sending the return data to the client picture processing module.
The client picture processing module is deployed at a client of the SCADA system, is in communication connection with the server picture processing main program module, and is used for realizing that: receiving a user picture calling request; sending a picture calling request; receiving server return data; the picture analysis processing is performed, the picture configuration information is analyzed, the canvas is created and rendered, the picture real-time data is analyzed, the primitive state in the canvas is updated, and the related information is added into the client cache module; and the client side picture processing module comprises a picture display window for accommodating and displaying rendered pictures, and the window can only display one canvas at a time.
The client cache module resides in the client memory and is used for storing the picture information at the client, and the cache module only takes effect on the current client. Each picture storage information includes: a picture Id; a picture check code; and the canvas is used for analyzing the picture configuration information and creating and rendering by the client picture processing module.
Based on the SCADA system picture cache system, an SCADA dispatcher calls a picture to completely display the picture on a client HMI through the HMI, and the whole calling processing process comprises the following steps:
s10: a client picture processing module receives a user picture calling request and extracts a requested picture Id;
s20: inquiring corresponding picture information in a client cache module according to the requested picture object Id, extracting a picture check code from the found picture information, and taking the picture check code and the picture Id as request parameters; when the picture information cannot be found in the client cache module, only using the picture Id as a request parameter;
s30: the client side picture processing module sends a request parameter to a server side picture processing main program;
s40: the main server-side picture processing program analyzes and extracts the request parameters, corresponding picture information is inquired and obtained from a server-side cache module according to the picture Id in the request parameters, and S501 is continuously executed if corresponding storage exists in the cache module; optionally, if no corresponding storage information exists in the cache module, S502 continues to be executed;
s501: and acquiring corresponding picture information from the server side cache module. Extracting necessary data from the request parameters and returning the data to the server side picture processing main program;
s502: acquiring picture information through a server data query module, storing the picture information to a server side cache module, extracting necessary data from the server side cache module according to request parameters, and returning the necessary data to a server side picture processing main program;
further, the data extraction processing procedures described in steps S501, S502: if the request parameter comprises a picture check code, extracting the picture check code contained in the picture information to compare with the picture check code, and if the comparison is consistent, only extracting the real-time picture data in the picture information; and if the comparison is inconsistent or the request parameters do not contain the picture check code, simultaneously extracting the picture configuration information, the picture check code and the picture real-time data in the picture information.
S60: the server side picture processing main program returns information and sends the information to the client side picture processing module;
s70: the client picture processing module analyzes data information returned by the server, and if the returned data only contains picture real-time data, the step S801 is continuously executed; optionally, if the returned data includes the screen configuration information, the screen check code, and the screen real-time data at the same time, continuing to execute S802;
s801: extracting canvas objects from the picture information found in the step S20, replacing the canvas objects into a picture display window for display, and updating primitive states in the canvas according to the picture real-time data analyzed in the step S70;
s802: creating and rendering a new canvas according to the picture configuration information analyzed in the step S70, replacing the canvas into a picture display window for display, forming a cache by the requested picture Id, the picture check code and the newly created canvas and correspondingly adding the cache into the client cache module, and finally updating the primitive state in the canvas according to the picture real-time data analyzed in the step S70.
The invention has the beneficial effects that:
the beneficial effects of the SCADA system picture caching system are as follows: the invention adds a client-side and a server-side cache module in the picture system, and designs a cache updating module for updating the data of the server-side cache module in real time. In an actual service system, when a dispatcher selects to call a picture in a client-side HMI (human machine interface), the dispatcher searches for data required by matching in a client-side cache module and a server cache module, and when the cache data exists and is available, the client-side HMI can directly use the cache data to achieve the purpose of quickly calling the picture, so that the waiting time for calling the picture is reduced. Meanwhile, the server side picture module is stored in a server memory and can be called by a plurality of client side picture requests at the same time, the aims of caching once and repeatedly calling for a plurality of times are achieved, and the occupation of memory space is greatly reduced.
Drawings
FIG. 1 is a system block diagram of the present invention.
Fig. 2 is a diagram illustrating an exemplary structure of a server-side cache module according to the present invention.
Fig. 3 is a diagram illustrating an exemplary structure of a client cache module according to the present invention.
FIG. 4 is a flowchart of a screen call based on the caching system of 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 and specific embodiments.
Fig. 1 is a system structure diagram of the present invention, and according to fig. 1, a frame cache system of the SCADA system of this embodiment can be divided into two parts, i.e., a client and a server.
Wherein the server portion includes:
the server data query module is used for realizing query processing of the picture data, and comprises: acquiring picture configuration information from a real-time library according to the picture Id; verifying the configuration by using a verification algorithm and generating a picture verification code; and acquiring real-time values of all data objects bound in the picture information from the real-time library as picture real-time data.
The server side cache module is used for storing the image information in the server background, and each image storage information comprises: a picture Id; picture configuration information; a picture check code; and (5) real-time data of pictures.
And the server side cache updating module is used for updating the data of the picture object in the server side cache module in real time. Specifically, the method comprises the following steps: monitoring real-time changes of the data objects bound in the picture information in real time, and updating the latest real-time value to a server-side cache module when the data changes each time; and monitoring the configuration modification of the user in real time, and when any picture in the cache module at the server end is subjected to configuration modification, acquiring the latest configuration information, the latest picture check code and the latest picture real-time data of the picture through the server data query module, and updating the latest configuration information, the latest picture check code and the latest picture real-time data to the cache module at the server end.
The server side picture processing main program module is in communication connection with the client side picture processing module and is used for realizing that: receiving a picture request from a client; organizing the return data according to the request parameters; and sending the return data to the client picture processing module.
The client portion includes:
a client screen processing module for: receiving a user picture calling request; sending a picture calling request; receiving server return data; the picture analysis processing is performed, the picture configuration information is analyzed, the canvas is created and rendered, the picture real-time data is analyzed, the primitive state in the canvas is updated, and the related information is added into the client cache module; and the client side picture processing module comprises a picture display window for accommodating and displaying rendered pictures, and the window can only display one canvas at a time.
And the client side caching module is used for storing the picture information at the client side, and the caching module only takes effect on the current client side. Each picture storage information includes: a picture Id; a picture check code; and the canvas is used for analyzing the picture configuration information and creating and rendering by the client picture processing module.
Fig. 2 is a diagram illustrating an exemplary structure of a server-side cache module according to the present invention. In the structure diagram of fig. 2, the cache structure includes two parts, namely SchematicIdList and SchematicInfoMap. The schema tic list is an array used for storing the Id of the picture object stored by the cache module, the sequence of elements in the array represents the sequence of adding each cache object to the cache module, and the number of cached objects can be obtained according to the length of the array; the schema information map is a Hash object and is used for storing the picture check Code schema MD5Code, the picture configuration information schema content and the picture real-time data schema data.
Based on the example graph, the process of searching the designated picture object in the server cache module comprises the following steps:
s101: and the corresponding storage information can be directly searched in the schema InfoMap through the picture Id, if the corresponding storage information exists, the information is directly returned, otherwise, the information does not exist.
On the other hand, adding a new picture cache object to the server side cache module processing process:
s201: searching whether a corresponding picture object exists in the schema InfoMap according to the picture Id, and if so, deleting the specified picture Id from the schema IdList array and deleting the found cache picture object from the schema InfoMap;
s202: adding the picture Id to be added into the schema IdList array from the tail part, and storing the picture object to be added into the schema InfoMap object;
s203: and checking the length of the schema IdList array, deleting a picture Id from the head of the schema IdList array when the length of the schema IdList array exceeds a limit value, and deleting a cache picture object corresponding to the picture Id from the schema InfoMap.
Fig. 3 is a diagram illustrating an exemplary structure of a client cache module according to the present invention. In the structure diagram shown in fig. 3, the cache structure includes two parts, namely SchematicIdList and SchematicInfoMap. The schema tic list is an array used for storing the Id of the picture object stored by the cache module, the sequence of elements in the array represents the sequence of adding each cache object to the cache module, and the number of cached objects can be obtained according to the length of the array; the schema information map is a Hash object for storing the screen check Code schema md5Code and the canvas object drawpomponent.
Based on the example diagram, the query processing procedure of the client-side cache module and the adding processing procedure of the new cache object are the same as the corresponding operation processing procedure of the server cache module, and are not described again here.
Fig. 4 is a flowchart of a picture call process based on the cache system of the present invention, and according to fig. 4, the picture call process starts at step S301 and ends at step S319, specifically:
s302: receiving a client picture calling request, acquiring a requested picture Id, and continuing to execute the step S303;
s303: searching a cache object corresponding to the request picture Id in the client cache module, if the cache object exists, continuing to execute the step S304, and if the cache object does not exist, jumping to execute the step S305;
s304: extracting the picture check code in the cache object, taking the picture check code and the picture Id as request parameters, and continuing to execute the step S306;
s305: taking the picture Id as a request parameter, and continuing to execute the step S306;
s306: the client side picture processing module sends the request parameter to the server side picture processing main program, and continues to execute step S307;
s307: the main server-side picture processing program analyzes and extracts the request parameters, and continues to execute step S308;
s308: searching a cache object corresponding to the request picture Id in a server-side cache module, if the cache object exists, continuing to execute the step S309, and if the cache object does not exist, jumping to execute the step S310;
s309: obtaining the server cache picture information, and continuing to execute step S312;
s310: sending the picture Id to a server data query module to acquire picture information, and continuing to execute the step S311;
s311: saving the acquired picture information to a server side cache module, and continuing to execute the step S312;
s312: executing the "extract return data from screen information sub-flow" to obtain return data, and continuing to execute step S313;
s313: the server side picture processing main program sends the return data to the client side picture processing module, and continues to execute the step S314;
s314: judging whether the returned data only contains the real-time image data, if so, continuing to execute the step S315, otherwise, skipping to execute the step S316;
s315: extracting a canvas object from the picture information found in the step S303, replacing the canvas object with a picture display window for display, and continuing to execute a step S318;
s316: creating and rendering a new canvas according to the picture configuration information in the analyzed return data, replacing the canvas into a picture display window for display, and continuing to execute the step S317;
s317: adding the picture Id, the picture check code and the new canvas object created in the step S316 in the returned data into the client cache module, and continuing to execute the step S318;
s318: and analyzing the picture real-time data in the returned data to update the primitive state of the current canvas of the picture display window.
The sub-flow processing procedure of "extracting return data from screen information" executed in step S312 described above starts at step S401 and ends at step S407, and specifically:
s402: judging whether the request parameter received by the server side contains a picture check code, if so, continuing to execute the step S403, and if not, skipping to execute the step S405;
s403: extracting a picture check code from the picture information and comparing the picture check code with the requested picture check code, if the comparison is the same, continuing to execute the step S404, and if the comparison is not the same, skipping to execute the step S405;
s404: extracting real-time picture data in the picture information as return data, and continuing to execute the step S406;
s405: extracting the picture configuration information, the picture check code and the picture real-time data in the picture information as return data, and continuing to execute the step S406;
s406: and sending the return data to a server side picture processing main program.
The technical idea of the present invention is described above only, and the scope of the present invention should not be limited thereby, and any modifications made on the basis of the technical solutions according to the technical idea of the present invention are within the scope of the present invention. The technology not related to the invention can be realized by the prior art.
Claims (4)
1. A SCADA system picture cache system is characterized in that: the system comprises a server side data query module, a server side cache update module, a client side cache module, a server side picture processing main program module and a client side picture processing module;
the server data query module is used for realizing query processing of the picture data, and comprises: acquiring picture configuration information from a real-time library according to the picture Id; verifying the configuration by using a verification algorithm and generating a picture verification code; acquiring real-time values of all data objects bound in the picture information from a real-time library to be used as picture real-time data;
the server side cache module resides in the server and is used for storing the image information in the server background; the server-side cache module comprises a schema IdList and a schema InfoMap, wherein the schema IdList is an array and is used for storing the Ids of the picture objects stored by the server-side cache module, the sequence of elements in the array represents the sequence of adding each cache object to the server-side cache module, and the number of cached objects can be obtained according to the length of the array; the schema information map is a Hash object and is used for storing a picture check Code schema MD5Code, a picture configuration information schema content and a picture real-time data schema data;
the server-side cache updating module is used for updating data of the picture object in the server-side cache module in real time, and specifically comprises the following steps: monitoring real-time changes of the data objects bound in the picture information in real time, and updating the latest real-time value to a server-side cache module when the data changes each time; monitoring the configuration modification of a user in real time, and when any picture in the server side cache module is subjected to configuration modification, acquiring the latest configuration information, picture check codes and picture real-time data of the picture through the server data query module, and updating the latest configuration information, the picture check codes and the picture real-time data to the server side cache module;
the server side picture processing main program module resides in the server and is in communication connection with the client side picture processing module, and is used for realizing that: receiving a picture request from a client; organizing the return data according to the request parameters; sending the return data to a client picture processing module;
the client side picture processing module is deployed at a client side of the SCADA system, is in communication connection with the server side picture processing main program module, and is used for realizing that: receiving a user picture calling request; sending a picture calling request; receiving server return data; the picture analysis processing is performed, the picture configuration information is analyzed, the canvas is created and rendered, the picture real-time data is analyzed, the primitive state in the canvas is updated, and the related information is added into the client cache module; the client side picture processing module comprises a picture display window for accommodating and displaying rendered pictures, and the window can only display one canvas each time;
the client cache module resides in the client memory and is used for storing the picture information at the client, and the client cache module only takes effect on the current client.
2. A SCADA system picture caching system as claimed in claim 1, wherein: each picture storage information in the server side cache module comprises: a picture Id; picture configuration information; a picture check code; and (5) real-time data of pictures.
3. A SCADA system picture caching system as claimed in claim 1, wherein: each picture storage information in the client cache module comprises: a picture Id; a picture check code; and the canvas is used for analyzing the picture configuration information and creating and rendering by the client picture processing module.
4. A picture calling display method in a SCADA system picture cache system is characterized in that:
s10: a client picture processing module receives a user picture calling request and extracts a requested picture Id;
s20: inquiring corresponding picture information in a client cache module according to the requested picture Id, extracting a picture check code from the found picture information, and taking the picture check code and the picture Id as request parameters; when the picture information cannot be found in the client cache module, only using the picture Id as a request parameter;
s30: the client side picture processing module sends a request parameter to a server side picture processing main program;
s40: the main server-side picture processing program analyzes and extracts the request parameters, corresponding picture information is inquired and obtained from a server-side cache module according to the picture Id in the request parameters, and S501 is continuously executed if corresponding storage exists in the cache module; optionally, if no corresponding storage information exists in the cache module, S502 continues to be executed;
s501: acquiring corresponding picture information from a server side cache module, extracting necessary data from the corresponding picture information according to the request parameters, and returning the extracted necessary data to a server side picture processing main program;
s502: acquiring picture information through a server data query module, storing the picture information to a server side cache module, extracting necessary data from the server side cache module according to request parameters, and returning the necessary data to a server side picture processing main program;
the data extraction processing procedures described in steps S501 and S502: if the request parameter comprises a picture check code, extracting the picture check code contained in the picture information to compare with the picture check code, and if the comparison is consistent, only extracting the real-time picture data in the picture information; if the comparison is inconsistent or the request parameters do not contain the picture check code, simultaneously extracting the picture configuration information, the picture check code and the picture real-time data in the picture information;
s60: the server side picture processing main program returns information and sends the information to the client side picture processing module;
s70: the client picture processing module analyzes data information returned by the server, and if the returned data only contains picture real-time data, the step S801 is continuously executed; optionally, if the returned data includes the screen configuration information, the screen check code, and the screen real-time data at the same time, continuing to execute S802;
s801: extracting canvas objects from the picture information found in the step S20, replacing the canvas objects into a picture display window for display, and updating primitive states in the canvas according to the picture real-time data analyzed in the step S70;
s802: creating and rendering a new canvas according to the picture configuration information analyzed in the step S70, replacing the canvas into a picture display window for display, forming a cache by the requested picture Id, the picture check code and the newly created canvas and correspondingly adding the cache into the client cache module, and finally updating the primitive state in the canvas according to the picture real-time data analyzed in the step S70.
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