CN1968322A - Web service finding and integration proxy system - Google Patents
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Abstract
The invention relates to a Web service discover-integrated proxy system, used in work flow system, wherein the inventive system WSDIBroker is built on UDDI register center, uses public or private UDDI register center to store the web service and provided information; WSDIBroker provides service register and service search, and modify function and interfaces; WSDIBroker is formed by S-WSML interpreter, S-WSML/UDDI converter, service search engine and class comparer. The service search engine is formed by three filters, as name and context description filter, QoS weight filter and interface definition filter. The invention can combine the service of work flow system and web service.
Description
Technical field
The invention belongs to the Web service applied technical field, be specifically related to a kind of Web service discovery and Integrated Solution that is applied in the Workflow system.
Background technology
The basis of Web service is based upon on the open Internet Standard such as HTTP, XML, SOAP, WSDL.This technology allows all systems on the network to carry out alternately, their unified communication protocol that adopts SOAP as object reference, and XML is as the data format of standard.WSDL and UDDI obtain service describing agreement and the service discovery protocol that current industrial quarters is generally supported, HTTP supports transport layer protocol the most widely.Owing to be based upon on the open standard, respectively organize enterprise no matter the constructed system of which kind of technology of employing can both provide the service of self to the outside, thereby make the mutual possibility that becomes alternately.
Workflow is that the area of computer aided of operation flow realizes or realizes automatically.It transmits document, information or task or carries out according to a series of process rules between different executors.Workflow Management System is by the order of management work activity, for different activities distributes and calls relevant personnel or IT resource, provides the process automation of operation flow to carry out.
From the office automation system at the end of the seventies till now, Workflow Management System has developed considerable time.Nowadays, Workflow system is used in the various environment of paying no attention to, and from working environment is that associated treatment process automation of application data stream in the enterprise application integration field at center is handled with the document.At present, a lot of software development commercial cities provide the product of Workflow Management System, and the product that different software vendor provides is emphasized different functional characteristics respectively, and the user has also adopted different products to meet the different needs.
Support that the infrastructure and the solution of Web service are fast-developing, and ripe gradually.The more and more enterprises tissue is attracted in the many advantages aspect the application integration by Web service, begins Web service introduced their operation flow.Operation flow is the set of some business activities, and these business activities are connected together according to certain regular bidirection chain, and cooperation mutually is so that realize a complete function.Business activity then is an actual link can finishing specific function or task, and it is common at concrete applied logic in information system.
Workflow technology is as a modern enterprise implementation procedure management key technology with process control, for the business process of enterprise provides a complete frame from model analysis, foundation, management, emulation to operation.Simultaneously, Workflow Management System provides the support of overall process by cover Software tool integrated, interoperable for this framework.Through the development of decades, workflow technology moves to maturity gradually, be applied to so far bank, telecommunications, health care, the manufacturing, etc. numerous areas.
The development of Web service technology and maturation cause coming modeling Web service demands of applications more and more urgent with workflow, how the task in the workflow and Web service are combined to become extremely important.
Summary of the invention
The purpose of this invention is to provide a kind of Web service discovery and integration proxy system, this system can combine task in the Workflow system and Web service, better must satisfy business demand.
Technical scheme of the present invention is as follows: a kind of Web service discovery and integration proxy system, comprise workflow manager and UDDI registration center, and native system also comprises S-WSML interpreter, S-WSML/UDDI transducer, service search engine and class comparator;
The API that the S-WSML interpreter is based on Jena to be provided writes, and its function comprises the extraction to the attribute among the Profile of S-WSML;
The S-WSML/UDDI transducer is responsible for mutual with UDDI registration center;
The service search engine is responsible for obtaining from the S-WSML interpreter every attribute of service pattern, carries out search inquiry with these attributes as condition then, and the result is shown to the inquiry;
The API that the class comparator also is based on Jena to be provided writes, and its function is whether to judge class A and class B from same body, and judges the containment relationship of class A and class B.
Described UDDI registration center can be public or private, is used for preserving Web service and ISP's information.
Most important four functions of described S-WSML/UDDI transducer are respectively:
A. according to entity among the Java Object Creation UDDI of descriptor that comprises Web service and service message structure, call save_business () and the save_service () interface of UDDI then, with these information stores in the UDDI service register center:
B. according to the entity to be deleted and the index of service, call delete_business () and delete_service () interface deletion corresponding entity of UDDI registration center and the service of UDDI;
C. the get_registeredInfo () interface that calls UDDI obtains all by the brief information of the entity of certain specific user's registration and service from UDDI registration center;
D. call the find_service () interface of UDDI, search the service that all have S-WSML TModel, use for the service search engine from UDDI registration center.
The main composition of described service search engine partly is three filters: name and textual description filter (filter 1), QoS tolerance filter (filter 2) and interface semantic filtering device (filter 3).
The course of work of described service search engine is the every attribute that at first obtains the service pattern from the S-WSML interpreter, then with these attributes as condition, the S-WSML/UDDI transducer is provided, extract from registration center, all have the Service Instance that S-WSML TModel quotes and carry out three layer filtration, filter 1,2,3 carry out the coupling of service name and textual description respectively to Service Instance and service pattern, the coupling of QoS tolerance and the coupling of interface semanteme, obtain the grammer similarity respectively, the value of QoS similarity, if wherein any one similarity is less than or equal to bottom line, then this Service Instance is abandoned, do not return as Query Result, finally can be by all Service Instances of filter 3, after sorting according to the height of grammer similarity or QoS similarity or semantic similarity, be shown to the inquiry.
In the processing of described interface semantic filtering device, since input directly and the class in the body connect, so whether the coupling of parameter needs the class of comparative parameter correspondence at same body, whether the class that also will compare their correspondences has containment relationship and how many predicables is arranged.
The characteristics of system of the present invention are as follows:
1) proposed in Workflow system, to assist the integrated Web service of Web service to find scheme.
In this scheme, fully take into account Web service and be different from other general characteristics of using and Workflow system, search the Web service of satisfying business demand from following three aspects to the requirement of Web service:
● the title of Web service and textual description;
● the metric of Web service aspect service quality (QoS);
● the interface of Web service (input and output) semanteme.
2) defined a WSDL that satisfies the scheme demand.
In three aspects mentioning in the above, second aspect be consider Workflow system quality management and to the Web service requirement.Because the autonomy of Web service, Web service must have the ability of self-description QoS feature.The consideration of the 3rd aspect is that the self-description of Web service must provide the semantic information of interface at the integrated matter of semantics that faces of Web service.This is two requirements of the Web service discovery mechanism of this patent to the descriptive language proposition of Web service.
Description of drawings
Fig. 1 is the basic structure block diagram of system prototype WSDIBroker of the present invention;
Fig. 2 is the structured flowchart of service search engine;
Fig. 3 is the registration service flow chart;
Fig. 4 is the integrated morphology block diagram of WSDIBroker and Workflow Management System.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 1, WSDIBroker is Web service discovery and the Web service discovery in the Integrated Solution and the prototype system of integration proxy of this paper.WSDIBroker is based upon on the UDDI registration center, use UDDI public or private registration center as the physical store of preserving Web service and ISP's information, WSDIBroker externally provides the function and the interface of service registry and service search, modification.
WSDIBroker mainly is made of S-WSML interpreter, S-WSML/UDDI transducer, service search engine and 4 assemblies of class comparator.The main composition of service search engine partly is three filters: name and textual description filter, QoS tolerance filter and interface semantic filtering device.
The S-WSML/UDDI transducer is responsible for mutual with UDDI registration center.Most important four functions of S-WSML/UDDI transducer are respectively:
1. according to entity among the Java Object Creation UDDI of the descriptor that comprises Web service and service message structure, call save_business () and the save_service () interface of UDDI then, with these information stores in the UDDI service register center;
2. according to the entity to be deleted and the index of service, call delete_business () and delete_service () interface deletion corresponding entity of UDDI registration center and the service of UDDI;
3. the get_registeredInfo () interface that calls UDDI obtains all by the brief information of the entity of certain specific user's registration and service from UDDI registration center;
4. call the find_service () interface of UDDI, search the service that all have S-WSML TModel, use for the service search engine from UDDI registration center.
As shown in Figure 2, the service search engine obtains every attribute of service pattern from the S-WSML interpreter, then with these attributes as condition, the S-WSML/UDDI transducer is provided, extract from registration center, all have the Service Instance that S-WSML TModel quotes and carry out three layer filtration, filter 1,2,3 carry out the coupling of service name and textual description respectively to Service Instance and service pattern, the coupling of QoS tolerance and the coupling of interface semanteme, obtain the grammer similarity respectively, the value of QoS similarity, if wherein any one similarity is less than or equal to bottom line, then this Service Instance is abandoned, and does not return as Query Result.Finally can pass through all Service Instances of filter 3, after sorting according to the height of grammer similarity or QoS similarity or semantic similarity, be shown to the inquiry.The similarity bottom line is a parameter of user's appointment when service is searched in visit.It shows that the user wants to search the Service Instance of matching degree in what scope.Comprise three filters in the service search engine, be respectively name and textual description filter (filter 1), QoS tolerance filter (filter 2) and interface semantic filtering device (filter 3).Service Instance is according to 1,2, and 3 order is passed through the coupling and the screening of these three filters successively.Overall process speed is mainly considered in the selection of filter order.Change pass through in proper order of three filters, then search the needed time can change a lot.
In the processing of interface semantic filtering device, since input directly and the class in the body connect, so whether the coupling of parameter needs the class of comparative parameter correspondence at same body, whether the class that also will compare their correspondences has containment relationship and how many predicables is arranged.Require body all to adopt DAML+OIL to describe in the scheme of this patent.
The class comparator is write based on the API that Jena provides.Jean is a Java API bag with processing RDF of open source code, the function that has reading and writing, revises, browses and inquire about rdf model.The major function of class comparator comprises: judge that whether class A and class B are from same body 1.; 2. judge the containment relationship of class A and class B.
The S-WSML interpreter is write based on the API that Jena provides, and its function comprises the extraction to the attribute among the Profile of S-WSML.
Below in conjunction with the structure of Web service discovery and Integrated Solution in this Workflow system, description of drawings two application examples wherein.
Application example one:
As shown in Figure 3, have the user before the authority of visit registration service, must carry out UDDI user's registration.After the login service, the user can see all services of self registration and the brief information of corresponding entity.The user can carry out two kinds of operations: issue is service newly, perhaps browses, selects and nullify service listings.The issue action need provides the S-WSML interpreter of Web service to be released that the S-WSML file is explained and generates corresponding Java data object.The S-WSML/UDDI transducer is responsible for according to entity among the Java Object Creation UDDI of the descriptor that comprises Web service and service message structure, use save_business () and the save_service () interface of UDDI then, with these information stores in the UDDI service register center.When the user nullifies service operations, earlier selected service listings.Obtain the entity to be deleted and the index of service, give the S-WSML/UDDI transducer then and continue to handle, the S-WSML/UDDI transducer calls the delete_business () of UDDI and corresponding entity and the service in delete_service () the interface deletion UDDI registration center.
Application example two:
As shown in Figure 4, WSDIBroker is a new level between the ISFlow of UDDI registration center system, and all Web services are found and the registration operation is finished by WSDIBroker, a UDDI registration center physical store as WSDIBroker.WSDIBroker structure afterwards that figure below has shown the ISFlow system integration.After the integrated WSDIBroker, deployment of flow process Web service packing and Registering modules use the registration service of WSDIBroker will pack and dispose good flow process Web service and are registered to WSDIBroker, and the visible process defining tool meets the Web service of serving pattern by the service search of searching of WSDIBroker.Flow process Web service packing deployment and registration tool, visible process defining tool and system applies calling interface will provide the support to WSDIBroker, comprise: flow process Web service packing dispose and Registering modules in must increase the editor and the Core Generator of a S-WSML service description file and the wsdl document of having expanded, the visible process defining tool, the system applies calling interface must increase calling the Web service of S-WSML description, because S-WSML adopts WSDL as " base ", existing a large amount of WSDL interpretative tools can be reused.
Claims (6)
1, a kind of Web service discovery and integration proxy system comprise workflow manager and UDDI registration center, it is characterized in that native system also comprises S-WSML interpreter, S-WSML/UDDI transducer, service search engine and class comparator;
The API that the S-WSML interpreter is based on Jena to be provided writes, and its function comprises the extraction to the attribute among the Profile of S-WSML;
The S-WSML/UDDI transducer is responsible for mutual with UDDI registration center;
The service search engine is responsible for obtaining from the S-WSML interpreter every attribute of service pattern, carries out search inquiry with these attributes as condition then, and the result is shown to the inquiry;
The API that the class comparator also is based on Jena to be provided writes, and its function is whether to judge class A and class B from same body, and judges the containment relationship of class A and class B.
2, Web service discovery according to claim 1 and integration proxy system is characterized in that described UDDI registration center can be public or private, are used for preserving Web service and ISP's information.
3, Web service discovery according to claim 1 and 2 and integration proxy system is characterized in that most important four functions of described S-WSML/UDDI transducer are respectively:
A. according to entity among the Java Object Creation UDDI of descriptor that comprises Web service and service message structure, call save_business () and the save_service () interface of UDDI then, with these information stores in the UDDI service register center;
B. according to the entity to be deleted and the index of service, call delete_business () and delete_service () interface deletion corresponding entity of UDDI registration center and the service of UDDI;
C. the get_registeredInfo () interface that calls UDDI obtains all by the brief information of the entity of certain specific user's registration and service from UDDI registration center;
D. call the find_service () interface of UDDI, search the service that all have S-WSML TModel, use for the service search engine from UDDI registration center.
4, Web service discovery according to claim 1 and 2 and integration proxy system, the main composition that it is characterized in that described service search engine partly are three filters: name and textual description filter (filter 1), QoS tolerance filter (filter 2) and interface semantic filtering device (filter 3).
5, Web service discovery according to claim 4 and integration proxy system, the course of work that it is characterized in that described service search engine is the every attribute that at first obtains the service pattern from the S-WSML interpreter, then with these attributes as condition, the S-WSML/UDDI transducer is provided, extract from registration center, all have the Service Instance that S-WSML TModel quotes and carry out three layer filtration, filter 1,2,3 carry out the coupling of service name and textual description respectively to Service Instance and service pattern, the coupling of QoS tolerance and the coupling of interface semanteme, obtain the grammer similarity respectively, the value of QoS similarity, if wherein any one similarity is less than or equal to bottom line, then this Service Instance is abandoned, do not return as Query Result, finally can be by all Service Instances of filter 3, after sorting according to the height of grammer similarity or QoS similarity or semantic similarity, be shown to the inquiry.
6, Web service discovery according to claim 4 and integration proxy system, it is characterized in that in the processing of described interface semantic filtering device, since input directly and the class in the body connect, so whether the coupling of parameter needs the class of comparative parameter correspondence at same body, whether the class that also will compare their correspondences has containment relationship and how many predicables is arranged.
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| WO2010015131A1 (en) * | 2008-08-05 | 2010-02-11 | 天津大学 | A semantic-based web service relationship network system |
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| CN101697530B (en) * | 2009-11-16 | 2011-07-20 | 上海交通大学 | Service management system based on real-time dynamic service quality |
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| CN101833561B (en) * | 2010-02-12 | 2012-12-26 | 西安电子科技大学 | Natural language processing oriented Web service intelligent agent |
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