Easiest way to publish Java Web Services --how to

In a previous post I wrote about publishing a Web Service through an embeddable ejb3 implementation, which is good since @Stateless beans can have injected managed entityManagers, in some cases that is the way to go if you don't want to deploy your app in a full J2EE server or you need a more flexible environment.

Just days ago I found that the J2SE itself has an lightweight http server embedded into, and the API itself has an Endpoint class that allows you to publish a Web Service in a J2SE environment.

There is more than one way for doing this, but this is the more automatic I could found, the next is a working example. The JRE version I am using is 6 update 7, I am not sure since when it supports it

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import javax.jws.WebService;
import javax.jws.soap.SOAPBinding;
import javax.jws.soap.SOAPBinding.Style;
import javax.xml.ws.Endpoint;

@WebService

@SOAPBinding(style=Style.RPC) // without this it does not work automatically.

public class ASimpleTest {
public static class WebServiceTest {
public String callMe(String name) {
return "Hello "+name+" !";  
}
}
public static void main(String[] args) {
Endpoint.publish("http://localhost:8080/sayHello", 
new WebServiceTest());
// http://localhost:8080/sayHello?wsdl will be the 
// place for the wsdl generated on the fly

// remember to use the DNS address of your IP or 
// your IP itself if you want to expose so as to 
// be accessible not only from localhost or
// 127.0.0.1
}
}

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Now you wonder how does this work ? Well, as you publish(...) it starts its embedded http server and binds the webservice automatically generated from the WebServiceTest class to the ip:port you've specified. The threading configuration should be quite ok for most cases.

Have fun trying it !