RPC Webservices Bea User's Group March 2004

Building WebLogic Server RPC Web Services 03/02/04

Roadmap
Definition of a WLS Web Service
WLS Web Service architecture
Ant Tasks for building WLS Web Services
web-services.xml
Example of a stateless session EJB converted to an RPC style webservice
Q & A
© 2002 BEA Systems, Inc.

Definition of a WLS Web Service
Service oriented technology or architecture
Web based and accessed over HTTP or HTTPS
Described and invoked by XML, WSDL, XML Schema, SOAP, JAX-RPC, UDDI
Service is implemented by a Java class or a stateless session EJB
Runtime is implemented by a servlet
Is not a WLW Web Service, yet

WLS Web Service Architecture
Implemented by a WLS provided servlet in front of the service
Servlet filter chains may be added to enhance the handling of the request and response
Service implementation is a Java class or a stateless session EJB created by the service provider
Leverages the WLS Web Container

Ant Tasks for Building WLS Web Services
BEA provides several Ant tasks that can be used to create a WLS Web Service
Some of the tasks also have command line equivalents
servicegen – builds the service from a Java class or stateless session EJB
autotype – generates the serializer/deserializer classes for non-built in datatypes
clientgen – builds the client side jar file
wsdlgen – generates WSDL from web service artifacts

servicegen Ant Task
Converts Java class or SS EJB into a web service
Creates web-services.xml, the web service deployment descriptor
May create serializer/deserializer classes for non-built-in datatypes
Packages the web service in a WAR file and adds it with the service implementation to an EAR file for deployment

autotype Ant Task
Used for support of non-built-in datatypes
Generates the serializer/deserializer class
Generates the holder class for the datatype
Generates the XML Schema datatype
Generates the datatype mapping information used in web-services.xml
Inputs can be a Java class file, an EJB jar file, URL of a WSDL, or XML Schema of the datatype
Output depends on input
Available as a command line utility

clientgen Ant Task
Used to build client side jar file for invoking the web service
Generates the client-side interface and stubs for JAX-RPC static invocation
Generates a client side WSDL
Generates the serializer/deserializer classes for parameters and return types
Available as a command line utility

wsdlgen Ant Task
Used to generate a WSDL file from a web service EAR file
Available as a command line utlility

web-services.xml DD
Found in WEB-INF in the web service WAR file
Configures the WLS Web Service runtime
Contains types, type-mapping, components, and operations for the web service
The existence of web-services.xml is recognized by WLS at deployment which maps the Context URI to the WLS Web Services Servlet

Web Service Example
Stateless Session EJB component
Uses non-built-in datatypes
Returns an array of abstract datatype
Codec and Holders built with autotype
Web service built with servicegen
Static client to invoke web service
Client side jar file built with clientgen
Example of using wsdlgen to create a WSDL file

RPC Webservices Bea User's Group March 2004

by Soaring Eagle L.L.C. on Feb 13, 2011

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RPC Webservices Bea User’s Group March 2004 — Presentation Transcript