CN114095568A - Message transmission device and method based on middleware technology - Google Patents
Message transmission device and method based on middleware technology Download PDFInfo
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Abstract
The invention provides a message transmission device and method based on middleware technology, comprising the following steps: determining that the communication interface module is a server side or a client side, and initializing; reading and analyzing the content in the configuration script to obtain a server configuration element and a client configuration element; starting a server and a client; and creating a link between the server and the client according to the obtained server configuration element and the client configuration element, and starting message transmission. According to the invention, through a lightweight middleware technology, the small component code amount is realized, the processing logic is simple, and the real-time performance of communication is improved; the data receiving and transmitting are filtered, the targeted transmission of the message is realized, the safety of data communication is ensured, and the reliability of communication is improved.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a message transmission device and method based on a middleware technology.
Background
The vehicle-mounted weapon platform has the characteristics of large platform and multiple independent devices. In the process of data communication among all devices in the platform, a bus technology communication mode or a network communication mode is generally adopted; the traditional internal network communication of the vehicle-mounted weapon platform mostly adopts a point-to-point Ethernet communication mode facing unreliable connection based on UDP protocol or adopts an Ethernet communication mode facing reliable connection based on TCP protocol, and protocols need to be established separately among devices needing communication and communication interface function development is needed. With the increasing development of the demand on the vehicle-mounted weapon platform, the complexity of the system is increased, the number of devices participating in network communication in the system is increased, and the information flow in the platform is more complicated; in the process of developing or optimizing the system, the requirement of adding equipment or forwarding interfaces can be met, so that a software communication interface needs to be developed for a specific interface and equipment, and the workload and the labor cost are increased.
The middleware technology is an asynchronous transmission mechanism data communication technology, and is mainly applied to data communication integration of a high-complexity step-type system. The middleware realizes decoupling between applications in the system, including intercepting request call, being responsible for finding out objects capable of realizing the request, transmitting parameters, calling response methods, returning results and the like, and shielding the difference between an operating system and a network protocol. At present, the existing open source middleware is more, the application scene of the general middleware is complex, the function is strong, and the introduction of the middleware can improve the complexity of the system. And the middleware code body is comparatively huge, the development language is various, bring higher working cost for the developer to customize and reform the corresponding source code according to the concrete use scene, and open source middleware also has slow grade disadvantage of responding to on technical support and maintenance.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a message transmission device and method based on middleware technology. The scheme of the invention can solve the problems in the prior art.
The technical solution of the invention is as follows:
according to a first aspect, a message transmission device based on middleware technology is provided, which comprises a communication interface module and a configuration script, wherein all information of clients and services is stored in the configuration script; the communication interface module comprises a running thread module and a client/server identification, and realizes data receiving or sending processing of the client or the server, the client/server identification is used for identifying the module as a client or a server for communication, and the running thread module acquires information of the client and/or the service from a configuration script to realize data receiving and sending of the client and/or the server; the running thread module is a data interface module, comprises a client running thread and a service running thread, and provides a running thread environment for a client or a server; the data interface module comprises a client data interface module and a server data interface module which are respectively connected with the client and the server to complete the initialization of the client or the service, the subscription and the registration of the message and the matching of the corresponding client or the service.
Further, the data interface module comprises a cache processing module, a message registration information list, a matching client or service information list, a communication link list and a communication socket.
Preferably, the cache processing module includes a queue container and a mutex lock, and implements the buffer processing of the received and transmitted data and thread security assurance.
Further, the configuration script is a descriptive language script.
Further, the configuration script includes: the system comprises a service port number, a service keep-alive period, a service publishing information list, a service subscribing information list, a locked client, data which the client allows to send and receive, a client service communication address, a backup service communication address, a service port number, a client keep-alive period, a client publishing information list and a client subscribing information list.
According to a second aspect, there is provided the above message transmission method based on middleware technology, including the following steps:
determining that the communication interface module is a server side or a client side, and initializing;
reading and analyzing the content in the configuration script to obtain a server configuration element and a client configuration element;
starting a server and a client;
and creating a link between the server and the client according to the obtained server configuration element and the client configuration element, and starting message transmission.
Further, the server configuration element includes: the method comprises the steps of service port number, service keep-alive period, service publishing information list, service subscribing information list, locking client and data allowed to be sent and received by the client.
Further, the client configuration element includes: the service communication address, the backup service communication address, the service port number, the client keep-alive period, the client publishing information list and the client subscribing information list.
Further, the functions of the server include: the network port interception is to judge the client terminal appointed by the server terminal and store the information of the client terminal; keep-alive check, namely the server detects the connection state of the corresponding client according to the keep-alive period, and if the connection state is invalid, the client is deleted from the stored information list; receiving data, namely receiving the registered client connection and the registered message of the client, and performing receiving and logic processing; and data sending, namely, checking the message cache processing module of the server and sending the data to be sent to the client.
Further, the method for transmitting the information of the server side comprises the following steps:
according to the connection request of the client, when the client is judged to be the client registered in the configuration elements, the information of the client is stored;
judging the state of the client, if the connection state of the client is valid, performing the next step, and if the connection state of the client is invalid, deleting the information of the client from the storage list, and performing the previous step;
the server receives the information transmitted by the client or sends the information to the client.
Further, the functions of the client include: the network port interception is to judge the server appointed by the server and store the information of the server; keep-alive check, namely the server detects the connection state of the corresponding server according to the keep-alive period, if the connection state is invalid, the server is deleted from the stored information list and a reconnection mechanism is triggered; receiving data, namely receiving the registered server connection and the registered information of the server, and performing receiving and logic processing; and data sending, namely, checking the client message cache processing module and sending the data to be sent to the server.
Further, the method for transmitting the client information comprises the following steps:
according to the connection request of the server, when the server is judged to be the server registered in the configuration elements, the information of the server is stored;
judging the state of the server, if the connection state of the server is valid, carrying out the next step, and if the connection state of the server is invalid, deleting the information of the server from the storage list, starting a reconnection mechanism, and carrying out the previous step;
the client receives the information transmitted by the server or sends the information to the server.
Further, the reconnection mechanism is as follows: and when the client finds that the link with the server is disconnected, performing a re-link request with the server, and traversing all backup servers during the link until the link is successful.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, through a lightweight middleware technology, the small component code amount is realized, the processing logic is simple, and the real-time performance of communication is improved;
(2) the invention filters the receiving and sending data through the registration and subscription mechanism of the message, realizes the targeted transmission of the message and ensures the safety of data communication;
(3) the invention adopts a mode of server backup redundancy, thereby improving the reliability of communication;
(4) the invention filters the received and transmitted data through the registration and subscription mechanism of the message, realizes the targeted transmission of the message and ensures the safety of data communication.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments 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. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic diagram illustrating a message transmitting apparatus based on middleware technology according to an embodiment of the present invention;
FIG. 2 illustrates a messaging device deployment diagram of middleware techniques provided in accordance with an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a message transmission method based on a middleware technology according to the middleware technology provided in an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1, a message transmitting apparatus based on middleware technology according to an embodiment of the present invention includes a communication interface module and a configuration script, where all information of a client and a server is stored in the configuration script; the communication interface module comprises a running thread module and a client/server identification, and realizes data receiving or sending processing of the client or the server, the client/server identification is used for identifying whether the module is used as a client or a server for communication, and the running thread module acquires information of a client and/or a service from a configuration script and realizes data receiving and sending of the client and/or the server; the operation thread module is a data interface module, comprises a client operation thread and a service operation thread, and provides an operation thread environment for a client or a server; the data interface module comprises a client data interface module and a server data interface module which are respectively connected with the client and the server to complete the initialization of the client or the service, the subscription and the registration of the message and the matching of the corresponding client or the service. The received and transmitted data are filtered through a message registration and subscription mechanism of the middleware technology, the targeted transmission of the message is realized, and the safety of data communication is ensured.
Further in one embodiment, the data interface module comprises a cache processing module, a message registration information list, a matching client or service information list, a communication link list and a communication socket. Preferably, in an embodiment, the cache processing module includes a queue container and a mutex lock, and implements buffering processing of the received and transmitted data and thread security assurance, where the queue container is used to store data to be transmitted, and the mutex lock is used to ensure the order and security of the threads. Preferably, the matching client or service information list is used for storing matching information of the client and the service; the communication link list is used for storing the client and the server with effective link states; the communication socket is used for realizing transceiving communication of data.
Further in one embodiment, the configuration script is a descriptive language script, which in one embodiment may be in xml format.
Further in one embodiment, the content of the configuration script includes: the system comprises a service port number, a service keep-alive period, a service publishing information list, a service subscribing information list, a locked client, data which the client allows to send and receive, a client service communication address, a backup service communication address, a service port number, a client keep-alive period, a client publishing information list and a client subscribing information list. Preferably, the service port number is a network port for communication, a time period for the server to check whether a client link is valid is set in a keep-alive period of the server, the server stores information sent by the server in a publishing information list, the server registers and receives information in a subscription information list, whether the server is stored in the client for establishing connection with a fixed client is locked, the client allows the sent and received data to store a client publishing message ID number and a subscription message ID number for communicating with the service, the client service communication address stores communication addresses of the client and the server, the backup service communication address stores a server communication address for backing up the client, the service port number is a port number of the server linked with the client, the time period for the server to link with the client to be valid is set in the keep-alive period of the client, and if the period exceeds the period, the client and the server are re-linked, the information sent by the client is stored in the client release information list, and the information registered by the client is stored in the client subscription information list. Through configuration scripts, message registration and subscription and client locking modes are set, messages and communication opposite terminals are filtered, and the pertinence and correct receiving processing of the messages are guaranteed.
According to a second embodiment, as shown in fig. 3, there is provided the above-mentioned message transmission method based on middleware technology, including the following steps:
step one, determining a communication interface module as a server or a client, and initializing;
reading and analyzing the content in the configuration script to obtain the content required by the server and the content required by the client;
further, in one embodiment, the content required by the server includes: the method comprises the steps of service port number, service keep-alive period, service publishing information list, service subscribing information list, locking client and data allowed to be sent and received by the client.
Further in one embodiment, the content required by the client includes: the service communication address, the backup service communication address, the service port number, the client keep-alive period, the client publishing information list and the client subscribing information list.
Step three, starting a server and a client;
further in one embodiment, the functions of the server include: the network port interception is to judge the client terminal appointed by the server terminal and store the information of the client terminal; keep-alive check, namely the server detects the connection state of the corresponding client according to the keep-alive period, and if the connection state is invalid, the client is deleted from the stored information list; receiving data, namely receiving the registered client connection and the registered message of the client, and performing receiving and logic processing; and data sending, namely, checking the message cache processing module of the server and sending the data to be sent to the client.
Further in one embodiment, the client functions include: the network port interception is to judge the server appointed by the server and store the information of the server; keep-alive check, namely the server detects the connection state of the corresponding server according to the keep-alive period, if the connection state is invalid, the server is deleted from the stored information list and a reconnection mechanism is triggered; receiving data, namely receiving the registered server connection and the registered information of the server, and performing receiving and logic processing; and data sending, namely, checking the client message cache processing module and sending the data to be sent to the server.
And step four, creating a link between the server and the client according to the obtained content of the server, the content of the client, the server thread and the client thread, and starting message transmission.
In a further embodiment, the method for transmitting the information at the server side includes the following steps:
judging the client appointed by the server according to the request of the client, and storing the information of the client;
judging the state of the client, if the connection state of the client is valid, performing the next step, and if the connection state of the client is invalid, deleting the information of the client from the storage list, and performing the previous step;
receiving information transmitted by the client or sending information to the client.
In a further embodiment, the method for client information transmission includes the following steps:
according to the connection request of the server, when the server is judged to be the server registered in the configuration elements, the information of the server is stored;
judging the state of the server, if the connection state of the server is valid, carrying out the next step, and if the connection state of the server is invalid, deleting the information of the server from the storage list, starting a reconnection mechanism, and carrying out the previous step;
the client receives the information transmitted by the server or sends the information to the server.
For better illustration of the invention, the invention will be further explained and illustrated with reference to the drawings and the specific embodiments.
In an embodiment, taking network communication between four computers as an example, the four computers are used as carriers of the message transmission device in the present invention, wherein two computers are used as service terminals, one is used as a main service terminal, the other is used as a backup service terminal, two computers are used as client terminals, and the network communication uses a TCP/IP protocol, as shown in fig. 2 specifically.
For the following description of the configuration script on each computer, the xml files of the configurations of the two computers at the server are the same, because the two computers play a role of backup redundancy, and the specific configuration script is shown in table 1:
table 1 server configuration script example parsing
The configuration scripts of the two computers at the client are also the same, and both the clients use the server 1 as the main server and the server 2 as the backup server, and the specific configuration scripts are shown in table 2:
table 2 client configuration script example parsing
The client 1, the client 2 and the server 1 communicate with the data 1, the data 2, the data 3 and the data 4 by deploying the middleware and configuring script files at the server and the client, and when the connection of the client 1 and the client 2 to the server 1 fails, the client 1 and the client 2 are connected back to the server 2, so that the redundant backup of the server is realized.
In summary, compared with the prior art, the invention has at least the following advantages:
(1) according to the invention, through a lightweight middleware technology, the small component code amount is realized, the processing logic is simple, and the real-time performance of communication is improved;
(2) the invention filters the receiving and sending data through the registration and subscription mechanism of the message, realizes the targeted transmission of the message and ensures the safety of data communication;
(3) the invention adopts a mode of server backup redundancy, thereby improving the reliability of communication;
(4) the invention filters the received and transmitted data through the registration and subscription mechanism of the message, realizes the targeted transmission of the message and ensures the safety of data communication.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. 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 (10)
1. A message transmission device based on middleware technology is characterized by comprising a communication interface module and a configuration script, wherein all information of clients and services is stored in the configuration script; the communication interface module comprises a running thread module and a client/server identification, and realizes data receiving or sending processing of the client or the server, the client/server identification is used for identifying the module as a client or a server for communication, and the running thread module acquires information of the client and/or the service from a configuration script to realize data receiving and sending of the client and/or the server; the running thread module is a data interface module, comprises a client running thread and a service running thread, and provides a running thread environment for a client or a server; the data interface module comprises a client data interface module and a server data interface module which are respectively connected with the client and the server to complete the initialization of the client or the service, the subscription and the registration of the message and the matching of the corresponding client or the service.
2. The message transmission apparatus based on middleware technology as claimed in claim 1, wherein the data interface module comprises a cache processing module, a message registration information list, a matching client or service information list, a communication link list and a communication socket.
3. The message transmission apparatus according to claim 2, wherein the buffer processing module comprises a queue container and a mutex lock, and implements buffering of the received and transmitted data and thread security assurance.
4. A middleware-based messaging device as in claim 1, wherein said configuration script is a descriptive language script.
5. The message transmitting apparatus based on middleware technology according to claim 4, wherein the configuration script comprises: the system comprises a service port number, a service keep-alive period, a service publishing information list, a service subscribing information list, a locked client, data which the client allows to send and receive, a client service communication address, a backup service communication address, a service port number, a client keep-alive period, a client publishing information list and a client subscribing information list.
6. A method of messaging for a messaging device based on middleware technology according to any of claims 1 to 6, characterised in that the method comprises the steps of:
determining that the communication interface module is a server side or a client side, and initializing;
reading and analyzing the content in the configuration script to obtain a server configuration element and a client configuration element;
starting a server and a client;
and creating a link between the server and the client according to the obtained server configuration element and the client configuration element, and starting message transmission.
7. The method as claimed in claim 6, wherein the server configuration element comprises: the method comprises the steps of a service port number, a service keep-alive period, a service publishing information list, a service subscription information list, a locked client and data allowed to be sent and received by the client; the client configuration element comprises: the service communication address, the backup service communication address, the service port number, the client keep-alive period, the client publishing information list and the client subscribing information list.
8. The message transmission method based on the middleware technology as claimed in claim 6, wherein the functions of the server side include: the network port interception is to judge the client terminal appointed by the server terminal and store the information of the client terminal; keep-alive check, namely the server detects the connection state of the corresponding client according to the keep-alive period, and if the connection state is invalid, the client is deleted from the stored information list; receiving data, namely receiving the registered client connection and the registered message of the client, and performing receiving and logic processing; data transmission, namely, checking a message cache processing module of a server and transmitting data to be transmitted to a client; the functions of the client comprise: the network port interception is to judge the server appointed by the server and store the information of the server; keep-alive check, namely the server detects the connection state of the corresponding server according to the keep-alive period, if the connection state is invalid, the server is deleted from the stored information list and a reconnection mechanism is triggered; receiving data, namely receiving the registered server connection and the registered information of the server, and performing receiving and logic processing; and data sending, namely, checking the client message cache processing module and sending the data to be sent to the server.
9. The message transmission method based on the middleware technology as claimed in claim 8, wherein the method for transmitting the server-side information comprises the following steps:
according to the connection request of the client, when the client is judged to be the client registered in the configuration elements, the information of the client is stored;
judging the state of the client, if the connection state of the client is valid, performing the next step, and if the connection state of the client is invalid, deleting the information of the client from the storage list, and performing the previous step;
the server receives the information transmitted by the client or sends the information to the client;
the method for transmitting the client information comprises the following steps:
according to the connection request of the server, when the server is judged to be the server registered in the configuration elements, the information of the server is stored;
judging the state of the server, if the connection state of the server is valid, carrying out the next step, and if the connection state of the server is invalid, deleting the information of the server from the storage list, starting a reconnection mechanism, and carrying out the previous step;
the client receives the information transmitted by the server or sends the information to the server.
10. A messaging method based on middleware technology as claimed in claim 9, wherein said reconnection mechanism is: and when the client finds that the link with the server is disconnected, performing a re-link request with the server, and traversing all backup servers during the link until the link is successful.
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