Concurrently Accessing Multiple Web Service Instances, by Joe Verzulli
WSJ Vol 02 Issue 03 - pg.63

	


Listing 1


IBookstore multiBookstore;
String urls =
 {"http://host1.com:8080/soap/servlet/rpcrouter",
 "http://host2.com:8080/soap/servlet/rpcrouter"}

multiBookstore =
 (IBookstore) MultiServiceProxy.newInstance(

Bookstore_ServiceProxy.class,

urls,

listener);

multiBookstore.getPrice("OOSC2");


Listing 2

class SampleIncrementalListener
 implements IIncrementalServiceListener
{
 public void result(ServiceResultEvent r)
 {
 System.out.println("Got result
"

+ r.getValue()

+ " from Web service "

+ "at URL " + r.getURL());
 }
}

 .
 .
 .

// The following code is in the client that will
// contact multiple web services.
IIncrementalServiceListener listener =

new SampleIncrementalListener();
multiBookstore =
 (IBookstore) MultiServiceProxy.newInstance(

Bookstore_ServiceProxy.class,

urls,

listener);

multiBookstore.getPrice("OOSC2");
System.out.println("Back from "

+ "multiBookstore.getPrice()");

Listing 3


public static synchronized Object newInstance(

Class webServiceProxyClass,

String urls[],

IServiceListener listeners[])
{
 return Proxy.newProxyInstance(
 webServiceProxyClass.getClassLoader(),
 webServiceProxyClass.getInterfaces(),
 new MultiServiceProxy(

webServiceProxyClass,

urls,

listeners));
}