This tutorial will take you through the steps required in developing, deploying and testing a Web Service in Apache Geronimo. After completing this tutorial you should be able to understand how to develop simple JAX-RPC compliant Web services in Apache Geronimo using Eclipse development environment. We also wont be focusing very much on developing client for JAX-RPC services as the client stubs generated are very close to that of JAX-WS.

To run this tutorial, as a minimum you will be required to have installed the following prerequisite software.

1. Sun JDK 6.0+ (J2SE 1.6)
2. Eclipse IDE for Java EE Developers, which is platform specific
3. Apache Geronimo Eclipse Plugin 2.1.x
4. Apache Geronimo Server 2.1.x

   Geronimo version 2.1.x, Java 1.5 runtime, and Eclipse Ganymede are used is used in this tutorial but other versions can be used instead (e.g., Geronimo version 2.2, Java 1.6, Eclipse Europa)

Details on installing eclipse are provided in the Development environment section. This tutorial will take you through the following steps:

Setting up Eclipse for application development

1. Select File -> New -> Project.
   
   
2. In the popup window, Select Web -> Dynamic Web Project category and click Next
   
   
   
3. Type jaxrpc-converter as the Project Name and click Next two times.
   
   
   
4. Modify the Group Id to org.apache.geronimo.samples.jaxrpc and the artifact id to jaxrpc-converter.
   
   
   
   
   
5. Click Finish.

This completes the configuration of Eclipse for application development.

Creating the Web services implementation code

1. Right click on JavaRsources:src and select New -> Package.
   
   
   
2. Name the package to org.apache.geronimo.samples.jaxrpc and click Finish.
   
   
   
3. Right click on the new package and select New -> Interface.
   
   
   
4. Name the interface as Converter and click Finish.
   
   
   
5. Add the following code to the Converter interface class: solidConverter.java package org.apache.geronimo.samples.jaxrpc; import java.math.BigDecimal; import java.rmi.Remote; import java.rmi.RemoteException; public interface Converter extends Remote{ public BigDecimal dollarToRupees(BigDecimal dollars) throws RemoteException; public BigDecimal rupeesToEuro(BigDecimal rupees) throws RemoteException; }
6. Right click on the new package and select New -> Class.
   
   
   
   
   
7. Name the class as ConverterImpl and click Finish.
   
   
   
   
   
8. Add the following code to the ConverterImpl class: solidConverterImpl.java package org.apache.geronimo.samples.jaxrpc; import java.math.BigDecimal; import java.rmi.RemoteException; public class ConverterImpl implements Converter{ private BigDecimal rupeeRate = new BigDecimal("40.58"); private BigDecimal euroRate = new BigDecimal("0.018368"); public BigDecimal dollarToRupees(BigDecimal dollars) throws RemoteException { BigDecimal result = dollars.multiply(rupeeRate); return result.setScale(2, BigDecimal.ROUND_UP); } public BigDecimal rupeesToEuro(BigDecimal rupees) throws RemoteException { BigDecimal result = rupees.multiply(euroRate); return result.setScale(2, BigDecimal.ROUND_UP); } }

This completes the development of Web services implementation code.

Setting up the deployment descriptor and deployment plan

Setting up the deployment descriptor

Expand WEB-INF directory and add the following code to web.xml:

Now we need to create some additional files which will configure and describe the service.

Creating the WSDL file

1. Right-click the WEB-INF directory and select New -> Other
   
   
   
   
   
2. Select WSDL from the Web Services category in the popup box.
   
   
   
   
   
3. Name the file as Converter.wsdl and click Finish.
   
   
   
   
   
4. Add the following code to Converter.wsdl:

Creating jaxrpcmapping.xml

1. Right click the WEB-INF directory and select New -> Other
   
   
   
   
   
2. Select XML from the XML category in the popup box.
   
   
   
   
   
3. Name the file as jaxrpcmapping.xml and click Finish.
   
   
   
   
   
4. Add the following code to jaxrpcmapping.xml: solidjaxrpcmapping.xml <?xml version="1.0" encoding="UTF-8"?> <java-wsdl-mapping xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.1"> </java-wsdl-mapping>

Creating webservices.xml

1. Right-click the WEB-INF directory and select New -> Other
   
   
   
   
   
2. Select XML from the XML category in the popup box.
   
   
   
   
   
3. Name the file as webservices.xml and click Finish.
   
   
   
   
   
4. Add the following code to webservices.xml: solidwebservices.xml <?xml version="1.0" encoding="UTF-8"?> <webservices xmlns="http://java.sun.com/xml/ns/j2ee" version="1.1"> <webservice-description> <webservice-description-name>JAX-RPC Converter Service</webservice-description-name> <wsdl-file>WEB-INF/Converter.wsdl</wsdl-file> <jaxrpc-mapping-file>WEB-INF/jaxrpcmapping.xml</jaxrpc-mapping-file> <port-component> <port-component-name>ConverterPort</port-component-name> <wsdl-port>ConverterPort</wsdl-port> <service-endpoint-interface>org.apache.geronimo.samples.jaxrpc.Converter</service-endpoint-interface> <service-impl-bean> <servlet-link>JAXRPCConverterService</servlet-link> </service-impl-bean> </port-component> </webservice-description> </webservices> This completes the setting up of Deployment Descriptor and Deployment Plans.

Let us walk through the files that we created.

• Converter.wsdl - Here we specify the web methods which are exposed and what are the request parameters and return parameters. We also specify other details like targetNamespace, service name, binding, port name, port type.
• jaxrpcmapping.xml - Actually this file specifies the mapping between the java methods and WSDL messages. Here it is not required as we are mapping all the methods to WSDL. For Further reference here is a sample that how a method will be mapped from Java to WSDL. solidjaxrpcmapping.xml <?xml version="1.0" encoding="UTF-8"?> <java-wsdl-mapping xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:Converter="http://org.apache.geronimo.samples.jaxrpc/" version="1.1"> <package-mapping> <package-type>org.apache.geronimo.samples.jaxrpc</package-type> <namespaceURI>urn:geronimo-samples</namespaceURI> </package-mapping> <service-interface-mapping> <service-interface> org.apache.geronimo.samples.jaxrpc.Converter; </service-interface> <wsdl-service-name> Converter:ConverterService </wsdl-service-name> <port-mapping> <port-name>ConverterPort</port-name> <java-port-name>ConverterPort</java-port-name> </port-mapping> </service-interface-mapping> <service-endpoint-interface-mapping> <service-endpoint-interface> org.apache.geronimo.samples.jaxrpc.Converter </service-endpoint-interface> <wsdl-port-type>Converter:Converter</wsdl-port-type> <wsdl-binding>Converter:ConverterSOAPBinding</wsdl-binding> <service-endpoint-method-mapping> <java-method-name>dollarToRupees</java-method-name> <wsdl-operation>dollarToRupees</wsdl-operation> <method-param-parts-mapping> <param-position>0</param-position> <param-type>java.math.BigDecimal</param-type> <wsdl-message-mapping> <wsdl-message> Converter:dollarToRupeesRequest </wsdl-message> <wsdl-message-part-name>in</wsdl-message-part-name> <parameter-mode>IN</parameter-mode> </wsdl-message-mapping> </method-param-parts-mapping> <wsdl-return-value-mapping> <method-return-value> java.math.BigDecimal </method-return-value> <wsdl-message> Converter:dollarToRupeesResponse </wsdl-message> <wsdl-message-part-name>out</wsdl-message-part-name> </wsdl-return-value-mapping> </service-endpoint-method-mapping> </service-endpoint-interface-mapping> </java-wsdl-mapping>
• webservices.xml - This is the file necessary for deploying any web services (JAX-RPC or JAX-WS). But starting from Java EE 5 webservices.xml is no longer necessary. This file contains all the necessary components to describe web service and where to find them.

Deploy and test the Web service

Now, we will look into the steps involved in deploying and testing our web service without any clients.

Deploy

1. Right click on the Apache Geronimo Server Runtime present in the servers view and select Add or Remove Projects
   
   
2. In the popup dialog, select the jaxrpc-converter project and click Add
   
   
   
   
   
3. Make sure that jaxrpc-converter is in the configured projects list and then click Finish
   
   
   
   
   
4. Wait for some time till the server status is changed to synchronized.

Testing

1. Once the application is deployed on to the server, Launch a browser and go to the following url:
   http://localhost:8080/jaxrpc-converter/converter .
2. Now you should see the screen telling that this is Converter Web service.
   
   WSDL File

   You can also view the WSDL file generated by Geronimo based on the annotations specified by going to the following url:
   http://localhost:8080/jaxrpc-converter/converter?wsdl

Changes required in Client

The most important change that you need to do in your client is to use javax.xml.rpc.Service instead of javax.xml.ws.Service.

The change you are required to do in the client JSP's are:

EJB JAX-RPC Web Service

EJB JAX-RPC are very much similiar to POJO JAX-RPC we just implemented. Also the most important change between JAX-RPC and JAX-WS EJB Web service are the EJB anotations are not supported.

• The class files that are necessary for a EJB JAX-RPC Web Service are:
  • Service Endpoint Interface - Converter.java
  • Home Interface - ConverterHome.java
  • Remote Interface - ConverterRemote.java
  • Bean Implementation - ConverterBean.java EJB Classes

    These classes that are required by JAX-RPC are according to J2EE 1.4 standards (As JAX-RPC theoretically maps to J2EE 1.4).

• Also in ejb-jar.xml, one has to specify which class are you using as Home, Remote, SEI, Bean. A sample ejb-jar.xml may look like this: solidejb-jar.jsp <ejb-jar xmlns="http://java.sun.com/xml/ns/j2ee" version="2.1"> <enterprise-beans> <session> <ejb-name>Converter</ejb-name> <home>org.apache.geronimo.samples.jaxrpc.ConverterHome</home> <remote>org.apache.geronimo.samples.jaxrpc.ConverterRemote</remote> <service-endpoint>org.apache.geronimo.samples.jaxrpc.Converter</service-endpoint> <ejb-class>org.apache.geronimo.samples.jaxrpc.ConverterBean</ejb-class> <session-type>Stateless</session-type> <transaction-type>Container</transaction-type> </session> </enterprise-beans> </ejb-jar> This completes the development of JAX-RPC Web Services. After completing this tutorial you should have a understanding about how JAX-RPC Web Services are deployed.