CN108494606B - WCF technology-based data service framework building method - Google Patents

WCF technology-based data service framework building method Download PDF

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Publication number
CN108494606B
CN108494606B CN201810351314.4A CN201810351314A CN108494606B CN 108494606 B CN108494606 B CN 108494606B CN 201810351314 A CN201810351314 A CN 201810351314A CN 108494606 B CN108494606 B CN 108494606B
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service
wcf
data
contract
data service
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CN108494606A (en
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方从刚
辜寄蓉
赵朋
陈翀
吕杨
刘光辉
王言
武椿江
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Sichuan Normal University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5041—Network service management, e.g. ensuring proper service fulfilment according to agreements characterised by the time relationship between creation and deployment of a service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • 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
    • H04L67/01—Protocols
    • 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
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
    • 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
    • H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services

Abstract

The invention discloses a WCF technology-based data service framework building method, which comprises the following steps: s1, defining a contract; s2, extracting configuration information; s3, loading data source configuration information; s4, initializing a channel; s5, binding initialization; s6, initializing a termination point; s7, describing an initialization service; s8, starting service; and S9, realizing the data service called by the client. The invention solves the problems of low portability, expansibility, universality and flexibility, single transmission protocol and low efficiency in the prior art, and fully utilizes the WCF technology to build a homeland resource data service framework and simultaneously support cross-platform data access and access of CS application, Web application, mobile terminal application and the like.

Description

WCF technology-based data service framework building method
Technical Field
The invention belongs to the technical field of WCF, and particularly relates to a method for building a data service framework based on WCF technology.
Background
Since the implementation of the 'land management method' on 1 st 1999, China depends on important projects such as land survey, digital national soil, 'gold-soil engineering' and 'one map' comprehensive supervision, and takes completion acceptance on 13 th 10 th 2010 'gold-soil engineering' as a mark, and China already masters the basic conditions such as position, boundary address, quantity, ownership and use of national soil resources, and accumulates abundant national soil resource management data. China always attaches importance to the application and exploration work of scientific and technological means in innovative homeland resource management, and is oriented to the normalized management and macro decision of homeland resources, a multi-level data service system and a multi-level management platform in China, such as China, provinces, cities, counties and the like are established, so that the method makes important contribution to the economic and social development.
The existing data service system and management platform have the following problems:
(1) the existing management platforms design and develop corresponding data service systems according to the construction needs of the systems, and have poor portability and expansibility;
(2) the existing data service system can only meet one type of requirements, and can not meet CS application, Web application and mobile terminal application at the same time;
(3) the existing data service system has strong pertinence, and the universality and the flexibility of the existing data service system are not enough to support the existing management requirements;
(4) the existing data service system has single data transmission protocol and low efficiency, and is not suitable for the current informatization construction.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method for building a data service framework based on the WCF technology, which solves the problems of poor portability, expansibility, universality and flexibility, single transmission protocol and low efficiency in the prior art, makes full use of the WCF technology, builds a homeland resource data service framework, and supports cross-platform data access and access of CS application, Web application, mobile terminal application and the like.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
a method for building a data service framework based on the WCF technology comprises the following steps:
s1: defining the contract: defining a service contract, describing an interface exposed to the outside, an operation supported by the service, a message exchange mode used, and a format of a message;
s2: extracting configuration information: extracting service configuration information and data source configuration information according to user requirements;
s3: loading data source configuration information: initializing and connecting a database according to the data source configuration information extracted in the step S2;
s4: initializing a channel: initializing the WCF channel according to the configuration information extracted in the step S2;
s5: and (3) initializing binding: loading the channel initialized in the step S4 into the binding, calling an interface provided by a development language, instantiating a class, and initializing the binding;
s6: initializing a termination point: combining the service configuration information extracted in the step S2 to obtain an address, and combining the binding obtained in the step S5 and the contract obtained in the step S1 to realize the combination of the address, the binding and the contract of the WCF service;
s7: describe the initialization service: extending or defining parameters or requirements of the WCF service at runtime, and event initialization describing the WCF service;
s8: and (3) starting service: starting the WCF service according to the configuration and initialization results from the step S1 to the step S7;
s9: and realizing the calling of the data service by the client.
The beneficial effect of this scheme does:
the invention provides a method for constructing a data service framework which has strong portability, expansibility, universality and flexibility, supports various transmission protocols and has high efficiency, fully utilizes the WCF technology, constructs a homeland resource data service framework, and supports cross-platform data access and access of CS application, Web application, mobile terminal application and the like.
Further, in step S1, the exposed interfaces are data service interfaces including a data source query and location interface, a data acquisition interface and a data storage interface, and the definitions of the interfaces include a description interface name, a list of required parameters and a return value.
Further, in step S2, the service configuration information includes an IP, a port number, a service name, and a transport protocol required by the data service; the data source configuration information includes the ID, type, user name, password, and data source connection information of the data source.
Further, in step S4, the WCF channel initialization includes initialization of transmission type, maximum connection number, buffer/pool size, and timeout setting.
Further, in step S4, the data of the channel is encrypted and decrypted by using an encryption algorithm during transmission, and is compressed and decompressed by using a compression algorithm.
Further, in step S7, the parameters or requirements of the WCF service at runtime include service throughput setting and channel throughput setting, where the service throughput setting and the channel throughput setting include the maximum number of processed messages, the maximum number of sessions, the maximum number of instances implementing the service contract, and the maximum number of items of transmission messages.
Further, in step S7, event initializations of the WCF service include an open event initialization, a failure event initialization, and a close event initialization.
Further, in step S7, each WCF service implements at least one service contract.
Further, in step S9, the client invokes the data service, including the following steps:
s9-1: acquiring data service access information, wherein the information refers to configuration parameters provided by a data service publishing system, and the configuration parameters comprise a server IP (Internet protocol), a port number, a service name, a database ID (identity) and an access type;
s9-2: creating a WCF client, and calling a program to create the WCF client corresponding to the contract according to the data service access configuration parameters acquired in the step S9-1 and the service contract defined by the server in the step S1;
s9-3: generating a contract agent: the client automatically generates a contract agent corresponding to the contract;
s9-4: and a server scheduling program.
Further, in step S9-4, the server scheduler includes the following steps:
s9-4-1: the server side monitors and extracts request content and requirements of the client side;
s9-4-2: analyzing the request content and the requirement in the step S9-4-1 and calling a corresponding data service interface;
s9-4-3: extracting or storing data according to the request content and the requirement of the client;
s9-4-4: and feeding back the result to the client.
Drawings
FIG. 1 is a flow chart of a method for building a data service framework based on WCF technology;
FIG. 2 is a flow chart of a method for a client to invoke a data service;
FIG. 3 is a flow chart of a method for a server scheduler.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
In the embodiment of the invention, a method for building a data service framework based on the WCF technology, as shown in FIG. 1, comprises the following steps:
s1: defining the contract: defining a service contract, describing an interface exposed to the outside, operation supported by the service, a used message exchange mode and a message format, wherein the interface exposed to the outside is a data service interface and comprises a data source query and positioning interface, a data acquisition interface and a data storage interface, and the definition of the service contract comprises description of an interface name, a required parameter list and a return value;
s2: extracting configuration information: extracting service configuration information and data source configuration information according to user requirements; the service configuration information comprises IP, port number, service name and transmission protocol required by the data service; the data source configuration information comprises ID, type, user name, password and data source connection information of the data source;
s3: loading data source configuration information: initializing and connecting a database according to the data source configuration information extracted in the step S2;
s4: initializing a channel: realizing WCF channel initialization according to the configuration information extracted in the step S2, wherein the WCF channel initialization comprises initialization of transmission type, maximum connection number, buffer/pool size and overtime setting, and the data of the channel adopts an encryption algorithm to encrypt and decrypt transmission content in the transmission process and adopts a compression algorithm to compress and decompress the transmission content;
s5: and (3) initializing binding: loading the channel initialized in the step S4 into the binding, calling an interface provided by a development language, instantiating a class, and initializing the binding;
s6: initializing a termination point: combining the service configuration information extracted in the step S2 to obtain an address, and combining the binding obtained in the step S5 and the contract obtained in the step S1 to realize the combination of the address, the binding and the contract of the WCF service;
s7: describe the initialization service: extending or defining parameters or requirements of the WCF service during operation and describing event initialization of the WCF service, wherein the parameters or requirements of the WCF service during operation comprise service throughput setting and channel throughput setting, the service throughput setting and the channel throughput setting comprise maximum processing message number, maximum session number, maximum instance number for realizing service contract and maximum item number of transmission message, the event initialization of the WCF service comprises opening event initialization, failure event initialization and closing event initialization, and each WCF service at least realizes one service contract;
s8: and (3) starting service: starting the WCF service according to the configuration and initialization results from the step S1 to the step S7;
s9: the implementation of the client invoking the data service, as shown in fig. 2, includes the following steps:
s9-1: acquiring data service access information, wherein the information refers to configuration parameters provided by a data service publishing system, and the configuration parameters comprise a server IP (Internet protocol), a port number, a service name, a database ID (identity) and an access type;
s9-2: and (4) establishing the WCF client, calling a DotNET program to establish the WCF client corresponding to the contract according to the data service access configuration parameters acquired in the step (S9-1) and the service contract defined by the server in the step (S1), and realizing the connection and communication between the client and the server. The client mainly comprises a CS application program, a WEB network program and a mobile terminal APP, and the access modes comprise a TCP and an HTTP, wherein the Web JavaScript application program acquires the server data in an HTTP mode, as shown in an application case (1), and the CS application program acquires the server data in a TCP mode, as shown in an application case (2);
s9-3: generating a contract agent: the client automatically generates a contract agent corresponding to the contract, the agent completely inherits and follows the content defined by the service contract, is a specific example of the service contract client, is a bridge for realizing and calling a data service system of the server by the client, and a user or a client program calls a method or an interface provided by the contract agent to perform the next steps;
s9-4: the server-side scheduler, which implements data extraction and storage services, as shown in fig. 3, includes the following steps:
s9-4-1: the server side monitors and extracts request content and requirements of the client side;
s9-4-2: analyzing the request content and the requirement in the step S9-4-1 and calling a corresponding data service interface;
s9-4-3: extracting or storing data according to the request content and the requirement of the client;
s9-4-4: and feeding back the result to the client.
(1) The Web JavaScript application program obtains server data in an HTTP mode:
the server side provides an HTTP mode, a WebDataSync method acquires data, the returned formats are unified into JSON, and the request information is as follows:
Figure BDA0001633438530000071
the returned information is as follows:
"mode ═ getfeatnfo & y ═ 3400035% 2E012512675& > GeoTable ═ V% 5 FJCDL% 5 FXZQ% 5FH & lyrName ═ E8% a 1% 8C% E6% 94% BF% E5% 8C% BA & x ═ 18413474% 2E 979487" { \\ "success \ tr \ usg \" \\\\\\ \ getable \ V _ JCDL _ 5632 \ H "," \ "Data [ \\\\\\\" title \ \ \ administrative region 5\ "\\\" \ "BD" \ "filterFillter \ urflag" \ idme "\\ \, { \\ "name \ consists of: \\ name of ownership unit \\\\\\\ \ and \ "value \": \\\\\\ \ "name \": \\\ land ownership type \\\\ \ value \ ": \\\\\\ \ "name \": \\ name of ownership unit \\\\\\\ \ and \ "value \": \\\\\\ \ "name \": \\\ value \ ": \\\\\\ \ "name \": \\ administrative area code \ and \ "value \": \\ 510108\ for "{ \\ name \ for": \\ administrative area name \\ "\" value \ ": \\ Chinese area \ "}, { \\ name \": \\ \ cadaver number \ value \ ": \\\\\\ \ "name \": \ "sitting unit code \", "value \": \\\\\\ \ "name \": \\ ownership unit code \ and \ "value \": \\\' } is used.
(2) The CS application program obtains server data in a TCP mode:
the server side provides a TCP mode, the GetData method acquires data, the returned format is unified into a DataTable object, and the server information is as follows:
name ═ LocalConnectInfo; // connection identification
ServerIP is "LocalHost"; // Server IP
ServerPort 8006; // Server Port
RemotingAppName ═ DataServer; // service name
ProtocalType ═ terraags. // transport protocol
The request code is:
DataServerClientcallBacks; // set of Server callback functions
Iro, dataServer, idataserver, dataServer; // set of service interfaces
System.Data.DataTable data＝null；
try{
// get WCF contract agent (service contract instantiation)
_ConnectAndRestartWCF(srvID,out callBacks,out dataServer)；
Acquiring data by invoking server GetData method through contract agent
The/parameter dbName refers to the name of the database, i.e. the data source
The/parameter Sql refers to the Sql statement that gets the data, such as: obtaining all table names in the database by select tname from tab
The parameter errMsg refers to that the server side obtains the error information returned when the data has errors, and the value is null when the server side executes the error information correctly
Figure BDA0001633438530000091
The invention provides a method for constructing a data service framework which supports various transmission protocols and has high efficiency, and provides a data service system which has strong universality, portability and expansibility, high efficiency, flexible use and diversity for the shared utilization of homeland resource data and the development and construction of an information system by introducing a WCF technology, thereby greatly reducing the difficulty of system construction, improving the utilization rate of data and fully exerting the data value of homeland resources.

Claims (9)

1. A method for building a data service framework based on the WCF technology is characterized by comprising the following steps:
s1: defining the contract: defining a service contract, describing an interface exposed to the outside, an operation supported by the service, a message exchange mode used, and a format of a message;
s2: extracting configuration information: extracting service configuration information and data source configuration information according to user requirements;
s3: loading data source configuration information: initializing and connecting a database according to the data source configuration information extracted in the step S2;
s4: initializing a channel: initializing the WCF channel according to the configuration information extracted in the step S2;
s5: and (3) initializing binding: loading the channel initialized in the step S4 into the binding, calling an interface provided by a development language, instantiating a class, and initializing the binding;
s6: initializing a termination point: combining the service configuration information extracted in the step S2 to obtain an address, and combining the binding obtained in the step S5 and the contract obtained in the step S1 to realize the combination of the address, the binding and the contract of the WCF service;
s7: describe the initialization service: extending or defining parameters or requirements of the WCF service at runtime, and event initialization describing the WCF service;
s8: and (3) starting service: starting the WCF service according to the configuration and initialization results from the step S1 to the step S7;
s9: the client side calls data service;
the client side calls the data service and comprises the following steps:
s9-1: acquiring data service access information, wherein the information refers to configuration parameters provided by a data service publishing system, and the configuration parameters comprise a server IP (Internet protocol), a port number, a service name, a database ID (identity) and an access type;
s9-2: creating a WCF client, and calling a program to create the WCF client corresponding to the contract according to the data service access configuration parameters acquired in the step S9-1 and the service contract defined by the server in the step S1;
s9-3: generating a contract agent: the client automatically generates a contract agent corresponding to the contract;
s9-4: and a server scheduling program.
2. The WCF technology-based data service framework building method of claim 1, wherein in step S1, the exposed interfaces are data service interfaces, including a data source query and location interface, a data acquisition interface and a data storage interface, and the definitions of which include description interface names, required parameter lists and return values.
3. The WCF technology-based data service framework building method of claim 1, wherein in step S2, the service configuration information includes IP, port number, service name, transport protocol required by data service; the data source configuration information comprises ID, type, user name, password and data source connection information of the data source.
4. The WCF technology-based data service framework building method of claim 1, wherein in said step S4, said WCF channel initialization includes initialization of transmission type, maximum connection number, buffer/pool size and timeout setting.
5. The WCF technology-based data service framework building method of claim 1, wherein in the step S4, the data of the channel is encrypted and decrypted by adopting an encryption algorithm during transmission, and is compressed and decompressed by adopting a compression algorithm.
6. The WCF technology-based data service framework building method of claim 1, wherein in the step S7, the parameters or requirements of the WCF service during operation include service throughput setting and channel throughput setting, and the service throughput setting and the channel throughput setting include a maximum number of processed messages, a maximum number of sessions, a maximum number of instances for realizing a service contract, and a maximum number of items for transmitting messages.
7. The WCF technology-based data service framework building method according to claim 1, wherein in the step S7, the event initialization of the WCF service includes an opening event initialization, a failure event initialization and a closing event initialization.
8. The WCF technology based data service framework building method of claim 1, wherein in the step S7, each WCF service implements at least one service contract.
9. The WCF technology-based data service framework building method of claim 1, wherein in the step S9-4, the server side scheduler comprises the following steps:
s9-4-1: the server side monitors and extracts request content and requirements of the client side;
s9-4-2: analyzing the request content and the requirement in the step S9-4-1 and calling a corresponding data service interface;
s9-4-3: extracting or storing data according to the request content and the requirement of the client;
s9-4-4: and feeding back the result to the client.
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