Java Web Service Simple Practicals..

Web Service Practical’s:

Open Eclipse :

Go File --> New --> Java Project :

Provide name and Click on Next..Then Finish..

    

In src folder create new package and classes as shown in Fig:

 

Code :

package com.demo.sayhello;

import javax.jws.WebMethod;

import javax.jws.WebService;

@WebService

public interface SayHello {

@WebMethod

public String sayhello(String name);

}

------------------------------------------------------------------------------ 

package com.demo.sayhello.impl;

import javax.jws.WebService;

@WebService(endpointInterface = "com.demo.sayhello.SayHello")

public class SayHelloImpl implements com.demo.sayhello.SayHello {

@Override

public String sayhello(String name) {

System.out.println("Hello "+ name);

return "Hello"+name;

}

}

---------------------------------------------------------------------------------- 

package com.demo.app;

import javax.xml.ws.Endpoint;

import com.demo.sayhello.impl.SayHelloImpl;

public class SayHelloApp {

/**

@param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

//http://localhost:9090/WS/sayHello?wsdl

Endpoint.publish("http://localhost:9090/WS/sayHello",

new SayHelloImpl());

}

}

Now run SayHelloApp.java  (Keeping it running.)

Jul 17, 2012 1:06:59 PM com.sun.xml.internal.ws.model.RuntimeModeler getRequestWrapperClass

INFO: Dynamically creating request wrapper Class com.demo.sayhello.jaxws.Sayhello

Jul 17, 2012 1:06:59 PM com.sun.xml.internal.ws.model.RuntimeModeler getResponseWrapperClass

INFO: Dynamically creating response wrapper bean Class com.demo.sayhello.jaxws.SayhelloResponse

And open url http://localhost:9090/WS/sayHello?wsdl

This is called WSDl file.This are web services hosted on http://localhost:9090/WS/sayHello?wsdl

Now we need to make available these services to client so client can use without knowing actual implementation.

Create new project WS-Client-Test

 

Now go to D:\GreatEasternProject\eclipse_Liferay_IDE_ws\WS-Client-Test\src from command prompt

D:\GreatEasternProject\eclipse_Liferay_IDE_ws\WS-Client-Test\src>wsimport -keep

 http://localhost:9090/WS/sayHello?wsdl

 

Now in Eclipse refresh folder src of WS-Client –Test.

 

So code to access web services is get generated.

wsimport command for JAX-WS applications

The wsimport command-line tool processes an existing Web Services Description Language (WSDL) file and generates the required artifacts for developing Java API for XML-Based Web Services (JAX-WS) Web service applications. see

Create new package com.demo.client and class Client.java

package com.demo.client;

import com.demo.sayhello.impl.SayHello;

import com.demo.sayhello.impl.SayHelloImplService;

public class Client {

/**

@param args

*/

public static void main(String[] args) {

SayHelloImplService  service = new SayHelloImplService();

SayHello sayhello = service.getSayHelloImplPort();

sayhello.sayhello("Darshan");

}

}

Run Clint.java and output: Hello Darshan

Now if u stops SayHelloApp.java, then http://localhost:9090/WS/sayHello?wsdl will not be available and Client.java will give following Exception.

Exception in thread "main" javax.xml.ws.WebServiceException: Failed to access the WSDL at: http://localhost:9090/WS/sayHello?wsdl. It failed with:

http://localhost:9090/WS/sayHello?wsdl.

at com.sun.xml.internal.ws.wsdl.parser.RuntimeWSDLParser.tryWithMex(Unknown Source)

at com.sun.xml.internal.ws.wsdl.parser.RuntimeWSDLParser.parse(Unknown Source)

at com.sun.xml.internal.ws.client.WSServiceDelegate.parseWSDL(Unknown Source)

at com.sun.xml.internal.ws.client.WSServiceDelegate.(Unknown Source)

at com.sun.xml.internal.ws.client.WSServiceDelegate.(Unknown Source)

at com.sun.xml.internal.ws.spi.ProviderImpl.createServiceDelegate(Unknown Source)

at javax.xml.ws.Service.(Unknown Source)

at com.demo.sayhello.impl.SayHelloImplService.(SayHelloImplService.java:46)

at com.demo.client.Client.main(Client.java:12)

Caused by: java.io.FileNotFoundException: http://localhost:9090/WS/sayHello?wsdl

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)

at java.net.URL.openStream(Unknown Source)

at com.sun.xml.internal.ws.wsdl.parser.RuntimeWSDLParser.createReader(Unknown Source)

at com.sun.xml.internal.ws.wsdl.parser.RuntimeWSDLParser.resolveWSDL(Unknown Source)

... 8 more

SO here we finish our web services.