Web service (JAX-WS) in JDK 6

JSR 224: XML-Based Web Services (JAX-WS) 2.0
JAX-WS Reference Implementation
Web Services tutorial in JavaEE5 tutorial
Webservices in JDK 6 - Vivek Pandey's Blog

// Web service Endpoint
// -- $ vim src/test/Master.java --
package test;

import java.util.Collection;

public class Master {
  private String name;
  private Collection slaves;

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public Collection getSlaves() {
    return slaves;
  }

  public void setSlaves(Collection slaves) {
    this.slaves = slaves;
  }

}

// -- $ vim src/test/Slave.java --
package test;

import javax.xml.bind.annotation.XmlTransient;

public class Slave {
  private String name;

  private Master master;

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  @XmlTransient()
  public Master getMaster() {
    return master;
  }

  public void setMaster(Master master) {
    this.master = master;
  }

}

// -- $ vim src/test/EchoWeb.java --
package test;

import java.util.ArrayList;
import java.util.Collection;
import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebService;
import javax.xml.ws.Endpoint;

@WebService()
public class EchoWeb {

  @WebMethod(operationName = "echo")
  public Master echo(@WebParam(name = "name")
  String name) {
    Master master = new Master();
    Collection slaves = new ArrayList();
    master.setSlaves(slaves);
    master.setName(name);

    Slave slave1 = new Slave();
    slave1.setName("slave1");
    slaves.add(slave1);

    Slave slave2 = new Slave();
    slave2.setName("slave2");
    slaves.add(slave2);

    return master;
  }
    
  public static void main(String[] args) throws Exception {
    EchoWeb echoWebService = new EchoWeb();
    Endpoint.publish("http://localhost/EchoWebService", echoWebService);
  }

}

// compile and run server
$ apt -d classes -s generated-src src/test/*.java
$ java -cp ./classes test.EchoWeb
$ firefox http://localhost/EchoWebService?wsdl

// Web Services Client
$ wsimport -d classes -s src http://localhost/EchoWebService?wsdl

// -- $ vim src/test/Main.java --
package test;

import java.util.List;

public class Main {

  public static void main(String[] args) {
    EchoWebService echoWebService = new EchoWebService();
    Master master = echoWebService.getEchoWebPort().echo("Hello World");
    System.out.println("Master Name: " + master.getName());
    List slaves = master.getSlaves();
    for (Slave slave : slaves) {   
      System.out.println("Slave Name: " + slave.getName());
    }
  }

}

// compile and run client
$ javac -cp classes -d classes src/test/Main.java
$ java -cp classes test.Main
Master Name: Hello World
Slave Name: slave1
Slave Name: slave2