CN101807204B - Dynamic creation method of processing Web service with remote sensing image - Google Patents
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Abstract
The invention provides a dynamic creation method of processing Web service with remote sensing image, comprising the following steps: when a service provider firstly publishes Web service, obtaining the name of Web service and related information of Web service according to the application program programming interface of Web service published by the service provider, generating the source code of Web service, compiling and generating the network service of Web service to describe language files, that is generating the Web service published by the service provider; when updating, just reading the API of Web service again, comparing the service name read by the API of Web service with the related information, judging whether the name of Web service and the related information are changed, generating the source code of Web service again if changing, and then generating the Web service again according to the source code. The method is capable of dynamically generating Web service automatically, thereby reducing the time of service generation, man power and material resource, and improving the efficiency when a large amount of Web services are generated.
Description
Technical field
The invention belongs to remote sensing image processing service technology field, particularly a kind of dynamic creation method of processing Web service with remote sensing image.
Background technology
Web service is a kind of new web application type, and a kind of self-contained, self-explanatory, modular application can be published, locate, and can call from any position on the Web.The ISP uses WSDL (Webservices description language; WSDL) service that they provide and how to call service is described; The unified description of utilization then, discovery and integrated (Universal description discovery integration, UDDI) with service registry in public registry.Service user or application program are found service and obtain to describe the WSDL of service that (Simple object access protocol SOAP) calls service under asynchronous message or far call pattern through Simple Object Access Protocol then in registration table.Web service and platform independence, programming language is irrelevant, but has intact encapsulation property, height integration capability, and has loosely-coupled characteristic.So Web service has received the attention and the application of each side.
The existing Web service all is static generally; Like ArcGIS Server is the service product of on the basis of ArcObject assembly, developing; Mainly comprise two parts: the GIS server and based on the ADF of .NET and Java exploitation (ArcGIS JavaWeb Application Developer Framework, ADF).Wherein, the GIS server is the set of many server objects, and these server objects have comprised and are connected to the G1S server and use the necessary ArcObjects of GIS server object; ADF is that .Net and Java developer provide the ArcObjects that adopts the GIS server end to come the framework of building network application program and network service respectively; GetIpUpDown has wherein encapsulated the details of bottom ArcObjects, but the embedding people develops in Visual Studio.net environment.Above-mentioned platform has been arranged, just can under certain translation and compiling environment, realize Web service by programming development, issued.The different Web services of ArcGIS Server all need manual programming to realize that the Web service of generation is fixed, and the interface parameters of the Web service of realization is also fixed.This is typical static Web service, and formation efficiency is low, particularly under the situation that the magnanimity Map Services generates.Pertinent literature: Kang Ling, Fu Junfeng, Wang Huaiqing, Cai Jingsong, based on the WebGIS application system development of ArcGIS Server, HYDROELECTRIC ENERGY science, 2007 Vol.25 No.1.
The dynamic exploitation of early stage Web service mainly is that the mode through dynamic generation web page realizes; Be that client browser sends the HTTP request to server; Server is through carrying out, explain certain application program; And operation result is transferred to client with the form of HTML, client is accepted, is explained and also shows the HTML that generates.Ripe in the above-mentioned development scheme have JSP (JavaServer Page be JSP) with the ASP and the ASP.NET of Java Servlet technology and Microsoft.
Java Servlet is based on the serve end program that Java writes, and is mainly used in interactively and browses and revise data, generates web content.Its generative process: (1) client sends a request to server end; (2) server is sent to Servlet with solicited message; (3) Servlet generates response contents and it is passed to server (response contents dynamically generates, and depends on the request of client usually); (4) server returns to client with response.Pertinent literature: sun is just complete, and Li Yan is with the method [J] of Java Servlet technology realization dynamic web page, Experiment Science&Technology, 2003 Vol.12 No.03.
The built-in script of the JSP page is based on Java's; And all be compiled as Java Servlet, be beneficial to, comprise the storage administration and the security of stalwartness so the JSP page has the institute of Java technology; The advantage of " once write, operation " everywhere and JavaServlet.The WEB server is at first carried out usability of program fragments wherein when running into the request of visit JSP webpage, then execution result is returned the client with HTML or XML form, and usability of program fragments can operating database, redirect webpage and send e-mail etc.Pertinent literature: Li Lei, look for Kang Shan, the brief introduction of Java Server Pages technology, scientific and technical information (Science Information), 2008No.20.
Active Server Pages (the dynamic state server homepage of Microsoft; ASP) be embedded among the Internet InformationServer (IIS); Can produce and carry out the application program of dynamic server in station interactive, expeditiously, also be one of main generating mode of current dynamic web page.ASP mainly is through with WWW (World Wide Web; The WWW) issue realizes dynamically generating the HTML homepage with database combination; Wherein often built-in with XML technology and ASP MDAC ActiveX Data Objects (ActiveX Data Objects, ADO) technology combines and sets up the page of database information, asks according to the user; In ASP, submit SQL statement to, receive Query Result and deal with data demonstration net result by specific interface to database.Pertinent literature: Liu Guangzhong, Wang Qiangbing utilizes the dynamic web page generation technique of ASP, and computer utility is in software, 2001Vol.18 No.4; Yang Jingjing utilizes XML and ASP technology to carry out the Web Data Dynamic and shows Fujian computer, 2004 No.9.
More than the purpose of these development technique mainly be to generate the webpage that can browse; Realized the constraint that separated, break away from hardware platform of dynamic page like JSP with static page; And mode such as compiling back operation, improve its execution efficient greatly and become the main flow developing instrument on the Internet gradually.Compare with it; But Web service is independently and the application component of self-description; This assembly can be used by other application program; And be not only the dynamic web page that can browse, so strictly speaking, above-mentioned development technique can not be regarded the dynamic generation that has realized Web service veritably as.
Also there are some to realize that client generates the technology of Web service dynamically, the method for a kind of automatic generation client that the Zhou Hongji of ZTE Co., Ltd proposes, the step of this invention is: the user initiates to obtain the request of Web service; System asks according to the user, obtains said Web service request corresponding uniform resource locator URL address according to the corresponding lists of storage in advance; According to said URL address; In the corresponding lists of storage in advance, find the relevant Web service description file; And the development environment generation corresponding Web service client source code predetermined according to system, on-the-flier compiler generates Web service client executing code, promptly generates the Web service client.This can only can not be applied to service end as the method for client service generation.
Pertinent literature: limited company of ZTE Corporation, Zhou Hongji, a kind of method of automatic generating network service client [P], Chinese patent, 200810098044.7,2009-11-25.
The generation of remote sensing image processing Web service; Needing the ISP to write Web service describes; The Web service generation method that present remote sensing image processing is used always is mostly through manually writing source code; Generate WSDL and Web service, writing of a secondary program need be manually carried out in service of every issue.Aspect remote sensing image processing, the deployment of service is often very many, if when hundreds of Web service is arranged, each service all need be carried out once manual coding, not only need spend great amount of manpower and material resources, and inefficiency.
Summary of the invention
Problem to be solved by this invention is that a kind of robotization means that can improve remote sensing image processing Web service formation efficiency are provided.
The present invention provides a kind of dynamic creation method of processing Web service with remote sensing image, and scheme is following:
When the ISP requires to issue Web service first, carry out following steps,
Step 1.1, according to the ISP to issue the API of Web service, obtain the Web service title;
Step 1.2 according to the Web service title, is read the Web service relevant information from the interface function that API provides;
Step 1.3 is created Web service, the Web service relevant information that the Web service title of reading according to step 1.1 and step 1.2 are read, generation Web service source code;
Step 1.4, according to the Web service source code that step 1.3 generates, compiling generates the web services definition language document of Web service, promptly generate the ISP the Web service that will issue;
When the ISP upgrade will issue the application program of Web service the time, carry out following steps,
Step 2.1 is obtained the Web service title again from API, and the Web service title of obtaining before upgrading with this compares, and after the reading Web service relevant information, gets into step 2.2 if the Web service title changes then again then; If the Web service title reading Web service relevant information again that do not change then, and the Web service relevant information of reading before this Web service relevant information and this upgraded compares, and do not change as if the Web service relevant information and then waits for next update; If the Web service relevant information changes and then gets into step 2.2;
Step 2.2, the Web service relevant information according to step 2.1 is read regenerates the Web service source code;
Step 2.3, the Web service source code according to step 2.2 generates recompilates the web services definition language document that generates Web service, promptly regenerate the ISP the Web service that will issue.
And said Web service relevant information comprises the parameter information of Web service, and said parameter information comprises property parameters title, type and the default value of Web service.
And said Web service source code is the source code under the development environment of being scheduled to, and realizes that under this development environment compiling generates the web services definition language document of Web service.
And said predetermined development environment is Visual Studio or JAVA development environment.
Method according to automatic generation remote sensing image processing provided by the present invention Web service generates Web service dynamically, does not need manual work to generate; And can change in application program the time,, regenerate Web service automatically through the renewal of API as the remote sensing image processing Web service.In a large amount of generation Web services, reduced time, man power and material that service generates, improved efficient.
Description of drawings
Fig. 1 is the process flow diagram of the embodiment of the invention when requiring the issue Web service first.
Fig. 2 for the embodiment of the invention upgrade the process flow diagram will issue the application program of Web service the time.
The practical implementation method
The key problem that the present invention will solve is: (Appiication Programming Interface API) generates the Web service source code to the API that dynamically provides according to the ISP, and compiling generates the WSDL document of Web service.When remote sensing image processing Web service application program changes, upgrade Web service.
Below in conjunction with accompanying drawing and embodiment, describe the method for dynamic generation remote sensing image processing of the present invention Web service in detail.
Referring to accompanying drawing 1, when the ISP requires to issue Web service first, carry out following steps,
Step 1.1, according to the ISP to issue the API of Web service, obtain the Web service title.
In order to support the dynamic generation of a large amount of Web services, present embodiment obtains its Web service title respectively from the API of each Web service.During practical implementation, can require the ISP to adopt the character string of consistent form that service name is provided, so that subsequent dynamic is discerned when generating Web service.Among the embodiment, form a character string after obtaining the Web service title of all Web services, the particular content of this character string comprises the title of the treatment of remote service that all ISPs provide, and form is with the different service name of same separator separation.For example: the title of service 1, the title of service 2 ..., the title of service n.
Step 1.2 according to the Web service title, is read the Web service relevant information from the interface function that API provides.
ISP's issue is about the API of information on services; Wherein provide interface function about the Web service relevant information; For the relevant information of Web service can completely be provided; Can set the parameter information that the Web service relevant information comprises the treatment of remote service, parameter information can be divided into property parameters title, type and default value again.Among the embodiment, the character string that at first obtains from step 1.1 parses the service name that is used to discern each treatment of remote service.Service name according to resolving gained further reads the attribute information character string that each Web service is used for characterising parameter information separately, comprises property parameters title, type and default value.Embodiment sets, and separates with unified character between each attribute of a service, uses the character that is different between the attribute as separator between the title of each attribute, type and the default value, and the necessary unanimity of the order of each attribute information is in order to avoid parse error.
For example:,, obtain to serve 1 attribute information character string: attribute 1, Class1, default value 1 according to the interface function that reads Service Properties that service name and API provide for service 1; Attribute 2, type 2; Attribute 3, type 2; Attribute 4, type 3, default value 2; Attribute 5, type 3, default value 3.Use between two attributes "; " separate, separate with ", " between the title of each attribute, type and the default value.
During practical implementation; The service name that reads may exist illegal service name variable (as to have the space; Or have an illegal symbol), after reading the service name that is used to the service of discerning, can carry out some handled (as removing space and replacement illegal symbol etc.) so to it; The typonym that reads also might be illegal (like float32), also can carry out some handled (like replacement operation); Default value for attribute also can carry out handled (as the situation of default value is not provided, can it be nullified).
During practical implementation, can programme by those skilled in the art and realize technical scheme of the present invention, offer user's practicality as software.Therefore, can design the title that on software interface, demonstrates all remote sensing image processing services, and corresponding attribute information, make things convenient for the Web service developer that the information of service is carried out visual operation.
Step 1.3 is created Web service, the Web service relevant information that the Web service title of reading according to step 1.1 and step 1.2 are read, generation Web service source code.
For the calling and realizing of API, and write the Web service source code, can be under any development environment, the language that use any service distribution person to need is write, is realized.The present invention is scheduled to development environment, generates the consistance that the Web service source code then helps each Web service issue based on this development environment.The development environment that present embodiment adopts is a Visual Studio development environment, and the Web service of under this development environment, creating is the ASP.NET Web service.Is the same based on the way of Java development environment with way based on Visual Studio development environment; The web services definition language document that corresponding compiling generates Web service during just based on the Java development environment adopts tomcat or apatch to act as agent, and adopts IIS during based on Visual Studio development environment.
During practical implementation, in the remote sensing image processing service that generates in batches, the Web title of different services is different with parameter information, only needs service name and parameter are write.The title of each service that obtains according to step 1.1 and the parameter information of each service of step 1.2 acquisition, the source code that dynamically generates each Web service gets final product.
Step 1.4, according to the Web service source code that step 1.3 generates, compiling generate Web service web services definition language (WebServices Description Language, WSDL) document, promptly generate the ISP the Web service that will issue.
Embodiment uses Visual Studio development environment to carry out the compiling of Web service source code, and the web services definition language that is generated is distributed on Internet information service (Internet Information Server, IIS) website.
Referring to Fig. 2, in order to tackle renewal, the present invention has designed the scheme of dynamic generation Web service, when the ISP upgrade will issue the application program of Web service the time,
Step 2.1 is obtained Web service title (consistent with step 1.1 practical implementation) again from API, and the Web service title of obtaining before upgrading with this compares, and judges whether the Web service title changes.The reading Web service relevant information again if the Web service title changes then directly gets into step 2.2 then.If the Web service title reading Web service relevant information again that do not change then,, and the Web service relevant information of reading before this Web service relevant information of reading and this renewal compared, judge whether the Web service relevant information changes.If the Web service relevant information does not change and then waits for next update; If having taken place to change, the Web service relevant information then gets into step 2.2.Again the embodiment of reading Web service relevant information is consistent with step 1.2 practical implementation, i.e. reading Web service relevant information from the interface function that API provides again.
Such as after issue first; When carrying out upgrading the first time; Be that the Web service title that this new Web service title of obtaining is obtained when issuing is first compared, if the different service related information of then this service related information of reading being read when issuing first compares; When carrying out upgrading the second time, be that the Web service title that this new Web service title of reading is read when upgrading is for the first time compared, if differently then this service related information of reading is read service related information when upgrading for the first time and compare.
Step 2.2 according to Web service title and the service related information that step 2.1 is read, regenerates Web service source code (consistent with step 1.3 practical implementation).
Step 2.3, the Web service source code according to step 2.2 generates recompilates the web services definition language document that generates Web service, promptly regenerate the ISP the Web service (consistent) that will issue with step 1.4 practical implementation.
That is to say; Web service is upgraded; Be that the remote sensing image processing attendant application is when changing; The descriptor of the remote sensing image processing service that the relevant API of the automatic update service of technical scheme of the present invention reads, renewal process embodiment detailed process when issuing first is consistent, and the present invention will not give unnecessary details.Can set, service distribution person only need ask and read API again, and the software that then provides according to technical scheme of the present invention is accomplished the generation of Web service source code automatically, the operation source program, and generate WSDL, can accomplish the renewal of service automatically.It is thus clear that adopt the present invention dynamically to generate Web service in batches, do not need manual intervention; And can, remote sensing image processing Web service application program, regenerate Web service automatically when changing through the renewal of API.Therefore the present invention is particularly suitable for applying to the remote sensing image processing service field, realizes a large amount of Web services that generate.
The embodiment that the above is merely among the present invention is not limited to the present invention.All within spirit of the present invention and principle, any modification of being made improves etc., all should be included within protection scope of the present invention.
Claims (4)
1. dynamic creation method of processing Web service with remote sensing image is characterized in that:
When the ISP requires to issue Web service first, carry out following steps,
Step 1.1, according to the ISP to issue the API of Web service, obtain the Web service title;
Step 1.2 according to the Web service title, is read the Web service relevant information from the interface function that API provides;
Step 1.3 is created Web service, the Web service relevant information that the Web service title of reading according to step 1.1 and step 1.2 are read, generation Web service source code;
Step 1.4, according to the Web service source code that step 1.3 generates, compiling generates the web services definition language document of Web service, promptly generate the ISP the Web service that will issue;
When the ISP upgrade will issue the application program of Web service the time, carry out following steps,
Step 2.1 is obtained the Web service title again from API, and the Web service title of obtaining before upgrading with this compares, and the reading Web service relevant information again if the Web service title changes then gets into step 2.2 then; If the Web service title reading Web service relevant information again that do not change then, and the Web service relevant information of reading before this Web service relevant information and this upgraded compares, and do not change as if the Web service relevant information and then waits for next update; If the Web service relevant information changes and then gets into step 2.2;
Step 2.2, the Web service relevant information according to step 2.1 is read regenerates the Web service source code;
Step 2.3, the Web service source code according to step 2.2 generates recompilates the web services definition language document that generates Web service, promptly regenerate the ISP the Web service that will issue.
2. dynamic creation method of processing Web service with remote sensing image as claimed in claim 1 is characterized in that: said Web service relevant information comprises the parameter information of Web service, and said parameter information comprises property parameters title, type and the default value of Web service.
3. according to claim 1 or claim 2 dynamic creation method of processing Web service with remote sensing image; It is characterized in that: said Web service source code is the source code under the development environment of being scheduled to, and realizes that under this development environment compiling generates the web services definition language document of Web service.
4. dynamic creation method of processing Web service with remote sensing image as claimed in claim 3 is characterized in that: said predetermined development environment is Visual Studio or JAVA development environment.
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| CN105159974A (en) * | 2015-08-27 | 2015-12-16 | 浪潮软件股份有限公司 | Method for automatically generating cross-data-source web service |
| CN106561030A (en) * | 2016-12-11 | 2017-04-12 | 天津汉铭科技发展有限公司 | Remote sensing image processing Web service dynamic generation method |
| CN106970948A (en) * | 2017-03-02 | 2017-07-21 | 努比亚技术有限公司 | The channel information management method and device of browser |
| CN110493067B (en) * | 2019-09-05 | 2022-02-18 | 中国银联股份有限公司 | Method and device for updating API gateway service |
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