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WSDL in Mule Esb

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Anand kalla

WSDL is an XML language used to describe web services, defining operations provided by the service, data formats, and location. It describes what a service does via operations, how it is accessed via protocols and data formats, and where it is located via URLs. A WSDL document defines types, messages, operations, bindings and services. Translators can generate code from WSDL or derive WSDL from existing code.

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WSDL in Mule Esb
Web Service Definition Language Predecessors include • COM, CORBA IDLs • Network Accessible Service Specification Language (IBM) • SOAP Contract Language (Microsoft) • First submitted to W3C in Sep 2000 • Current version is 1.1
 Define a web service in WSDL by • Writing an XML document conforming to the WSDL specs  Describes three fundamental properties • What a service does  Operations (methods) provided by the service • How a service is accessed  Data format and protocol details • Where a service is located  Address (URL) details
types message portType binding service All the data types used by the Web service Parameters and messages used by method port Abstract interface definition – each operation element defines a method signatureoperation Binds abstract methods to specific protocols A service is a collection of ports. A port is a specific method and its URI definitions
<?xml version="1.0" encoding="UTF-8" ?> <definitions name="net.xmethods.services.stockquote.StockQuote" targetNamespace="http://www.themindelectric.com/wsdl/net.xmethods.services.stockquo te.StockQuote/" xmlns:tns="http://www.themindelectric.com/wsdl/net.xmethods.services.stockquote.Sto ckQuote/" xmlns:electric="http://www.themindelectric.com/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns="http://schemas.xmlsoap.org/wsdl/"> <message name="getQuoteResponse1"> <part name="Result" type="xsd:float" /> </message> <message name="getQuoteRequest1"> <part name="symbol" type="xsd:string" /> </message>
Sample WSDL: getQuote <portType name="net.xmethods.services.stockquote.StockQuotePortType"> <operation name="getQuote" parameterOrder="symbol"> <input message="tns:getQuoteRequest1" /> <output message="tns:getQuoteResponse1" /> </operation> </portType> <binding name="net.xmethods.services.stockquote.StockQuoteBinding“ type="tns:net.xmethods.services.stockquote.StockQuotePortType"> <soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http" /> <operation name="getQuote"> <soap:operation soapAction="urn:xmethods-delayed-quotes#getQuote" /> <input> <soap:body use="encoded" namespace="urn:xmethods-delayed-quotes" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" /> </input> <output> <soap:body use="encoded" namespace="urn:xmethods-delayed-quotes" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" /> </output> </operation> </binding>
Sample WSDL: getQuote <service name="net.xmethods.services.stockquote.StockQuoteService"> <documentation>net.xmethods.services.stockquote.StockQuote web service </documentation> <port name="net.xmethods.services.stockquote.StockQuotePort" binding="tns:net.xmethods.services.stockquote.StockQuoteBinding"> <soap:address location="http://64.39.29.211:9090/soap" /> </port> </service> </definitions>
Translators available that can • Convert WSDL document to code  IBM’s WSTK Toolkit  Apache AXIS WSDL2java program  Soapy.py in Python  Not perfect • Derive WSDL from Java classes  Apache WSDL program  Much work remains to be done
WSDL in Mule Esb
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WSDL in Mule Esb

  • 2. Web Service Definition Language Predecessors include • COM, CORBA IDLs • Network Accessible Service Specification Language (IBM) • SOAP Contract Language (Microsoft) • First submitted to W3C in Sep 2000 • Current version is 1.1
  • 3.  Define a web service in WSDL by • Writing an XML document conforming to the WSDL specs  Describes three fundamental properties • What a service does  Operations (methods) provided by the service • How a service is accessed  Data format and protocol details • Where a service is located  Address (URL) details
  • 4. types message portType binding service All the data types used by the Web service Parameters and messages used by method port Abstract interface definition – each operation element defines a method signatureoperation Binds abstract methods to specific protocols A service is a collection of ports. A port is a specific method and its URI definitions
  • 5. <?xml version="1.0" encoding="UTF-8" ?> <definitions name="net.xmethods.services.stockquote.StockQuote" targetNamespace="http://www.themindelectric.com/wsdl/net.xmethods.services.stockquo te.StockQuote/" xmlns:tns="http://www.themindelectric.com/wsdl/net.xmethods.services.stockquote.Sto ckQuote/" xmlns:electric="http://www.themindelectric.com/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns="http://schemas.xmlsoap.org/wsdl/"> <message name="getQuoteResponse1"> <part name="Result" type="xsd:float" /> </message> <message name="getQuoteRequest1"> <part name="symbol" type="xsd:string" /> </message>
  • 6. Sample WSDL: getQuote <portType name="net.xmethods.services.stockquote.StockQuotePortType"> <operation name="getQuote" parameterOrder="symbol"> <input message="tns:getQuoteRequest1" /> <output message="tns:getQuoteResponse1" /> </operation> </portType> <binding name="net.xmethods.services.stockquote.StockQuoteBinding“ type="tns:net.xmethods.services.stockquote.StockQuotePortType"> <soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http" /> <operation name="getQuote"> <soap:operation soapAction="urn:xmethods-delayed-quotes#getQuote" /> <input> <soap:body use="encoded" namespace="urn:xmethods-delayed-quotes" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" /> </input> <output> <soap:body use="encoded" namespace="urn:xmethods-delayed-quotes" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" /> </output> </operation> </binding>
  • 7. Sample WSDL: getQuote <service name="net.xmethods.services.stockquote.StockQuoteService"> <documentation>net.xmethods.services.stockquote.StockQuote web service </documentation> <port name="net.xmethods.services.stockquote.StockQuotePort" binding="tns:net.xmethods.services.stockquote.StockQuoteBinding"> <soap:address location="http://64.39.29.211:9090/soap" /> </port> </service> </definitions>
  • 8. Translators available that can • Convert WSDL document to code  IBM’s WSTK Toolkit  Apache AXIS WSDL2java program  Soapy.py in Python  Not perfect • Derive WSDL from Java classes  Apache WSDL program  Much work remains to be done