Creating WSDL Extensions in Java

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CHAPTER 14 Creating WSDL Extensions
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http://eclipsewtporg/wsdl/soap/
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instead of the actual SOAP namespace:
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http://schemasxmlsoaporg/wsdl/soap/
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The W3C WSDL 11 Binding for SOAP 12 If you are ambitious, you might want to apply the following instructions to develop a realistic SOAP 12 binding as specified by the recent W3C Member Submission, WSDL 11 Binding Extension for SOAP 12 [WSDL11SOAP12] which defines the , namespace
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http://schemasxmlsoaporg/wsdl/soap12/
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Such an extension would be a welcome contribution to WTP You should send a note to the WTP developers list first to see if anyone else is already working on this The WTP developers mailing address is
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<wtp-dev@eclipseorg>
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Your goal is to support WSDL documents such as that for the echo service (see Example 143) Before diving into this chapter, take a minute to familiarize yourself with the WSDL tools so you ll better understand the changes you will make Launch a runtime workspace, create a new dynamic Web project, create the file Echowsdl in the project, and explore the WSDL editor, specifically the editor s representation of the WTP SOAP bindings Now that you ve explored the WSDL editor, in this chapter you will:
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Contribute binding extension elements for the WTP SOAP namespace to the WSDL editor Contribute a validator for the WTP SOAP namespace to the WSDL validator Contribute custom validation rules to enforce your organization s Web service naming conventions
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Example 143 Listing of Echowsdl
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< xml version="10" encoding="UTF-8" > <wsdl:definitions name="Echo" targetNamespace="http://wwwexampleorg/Echo/" xmlns:wtpsoap="http://eclipsewtporg/wsdl/soap/" xmlns:tns="http://wwwexampleorg/Echo/" xmlns:wsdl="http://schemasxmlsoaporg/wsdl/" xmlns:xsd="http://wwww3org/2001/XMLSchema">
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Creating WSDL Extensions
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<wsdl:types> <xsd:schema targetNamespace="http://wwwexampleorg/Echo/"> <xsd:element name="EchoResponse" type="xsd:string"/> <xsd:element name="EchoRequest" type="xsd:string"/> </xsd:schema> </wsdl:types> <wsdl:message name="EchoResponse"> <wsdl:part element="tns:EchoResponse" name="EchoResponse"/> </wsdl:message> <wsdl:message name="EchoRequest"> <wsdl:part element="tns:EchoRequest" name="EchoRequest"/> </wsdl:message> <wsdl:portType name="Echo"> <wsdl:operation name="EchoOperation"> <wsdl:input message="tns:EchoRequest"/> <wsdl:output message="tns:EchoResponse"/> </wsdl:operation> </wsdl:portType> <wsdl:binding name="EchoSOAP" type="tns:Echo"> <wtpsoap:binding style="document" transport="http://schemasxmlsoaporg/soap/http"/> <wsdl:operation name="EchoOperation"> <wtpsoap:operation soapAction="http://wwwexampleorg/Echo/NewOperation"/> <wsdl:input> <wtpsoap:body use="literal"/> </wsdl:input> <wsdl:output> <wtpsoap:body use="literal"/> </wsdl:output> </wsdl:operation> </wsdl:binding> <wsdl:service name="echo"> <wsdl:port binding="tns:EchoSOAP" name="EchoSOAP"> <wtpsoap:address location="http://wwweclipsewtporg/services/Echo"/> </wsdl:port> </wsdl:service> </wsdl:definitions>
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Warning: As of WTP 15, the WTP extension points and API shown in this chapter are not final These extension points and API may change in future versions of WTP
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Tip: The WS-I validator will produce warnings for the WTP SOAP namespace because the namespace is not defined in the WS-I profiles To remove these warnings, turn off the WS-I validator by navigating to the Web Services Profile Compliance and Validation preference page and setting both the WS-I AP and SSBP compliance levels to Ignore Compliance
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CHAPTER 14 Creating WSDL Extensions
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Creating the WSDL Extension Plug-in
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As when adding any function to Eclipse, to use the WSDL extensions required of the tasks in this chapter you need to create a plug-in to hold the extension definitions and the associated Java classes Create a new plug-in with the id
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orgeclipsewtpwsdlextensions
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and the name WSDL Extensions Plug-in using the New Plug-in Project wizard (see Figure 141) Ensure the options Generate an activator and This plug-in will make contributions to the UI are selected
Figure 141 Definition of the WSDL Extension Plug-in
Extending the WSDL Editor
Like many description languages, WSDL 11 is complex Taking the time to read and fully understand the specification and all of its intricacies is not always an option for developers who need to create Top-Down Web services (For more on Top-Down Web services, see 10) The WTP WSDL editor provides a way to visually author WSDL 11 documents The editor provides a design overview of a WSDL document and assists in the editing process
Extending the WSDL Editor
The WSDL editor comes with the logic for SOAP and HTTP bindings It is possible to author WSDL documents that specify other bindings without extending the editor, but the editor will not provide any assistance for these types of bindings In order for the editor to provide assistance and a non-generic visualization of other binding elements, it must be extended The WSDL editor consists of both source and design views The source view is the same XML source editor you used for DocBook in 13 The XML source editor is simply reused in the WSDL editor In order to extend the WSDL source editor to provide additional content assistance and context specific actions, you can provide extensions in the same way as for the XML source editor, or really for any Eclipse context menu, namely by contributing context actions for WSDL elements The design view (see Figure 142) is what you will extend in this section The design view can be extended to add first-class support for new namespaces First-class support encompasses custom icons for the namespace s extensibility elements, such as those for new binding types, new extensibility element options, and context sensitive actions In this section you will add a custom icon for the WTP SOAP binding, add the WTP SOAP extensibility elements to the editor s available list, and add a custom action to generate the WTP SOAP binding content