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3947

answers:

3

I want to share an object between my servlets and my webservice (JAX-WS) by storing it as a servlet context attribute. But how can I retrieve the servlet context from a web service?

+8  A: 

The servlet context is made available by JAX-WS via the message context, which can be retrieved using the web service context. Inserting the following member will cause JAX-WS to inject a reference to the web service context into your web service:

@Resource
private WebServiceContext context;

Then, you can access the servlet context using:

ServletContext servletContext =
    (ServletContext) context.getMessageContext().get(MessageContext.SERVLET_CONTEXT);
Jens Bannmann
If you're trying this on a JBoss EAP stack, and you start by creating a Seam project using the New Project Wizard in JBoss Developer Studio, you end up with a commons-annotations.jar file in your WEB-INF/lib (containing, among others, the @Resource annotation). The end result is that your WebServiceContext is not getting filled, and you get a NullPointerException. For us, the solution was simply to remove the commons-annotations.jar, to make sure that the JBoss-included version was used. After that, things went swimmingly. Thanks for the great answer, a real lifesaver!
László van den Hoek
A: 

Perfect Answer Thanks a lot

You should put this as a comment to an answer rather than as a separate answer
Ryan Fernandes
A: 

Saved my day.

But note, that it is accessible just after the ctor finished :(

So don't know how to figure out the applicationContext with not much boilerplate code...

Any ideas how to shorten this?

import javax.annotation.Resource;
import javax.jws.WebService;
import javax.servlet.ServletContext;
import javax.xml.ws.WebServiceContext;
import javax.xml.ws.handler.MessageContext;

import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

@WebService
public class MyWebService {


    // boilerplate code begins :(

    @Resource
    private WebServiceContext context;
    private WebApplicationContext webApplicationContext = null;

    /**
     * @return
     * @throws IllegalStateException
     */
    private WebApplicationContext getWebApplicationContext()
      throws IllegalStateException {
     if (webApplicationContext != null)
      return webApplicationContext;
     ServletContext servletContext =
       (ServletContext) context.getMessageContext().get(
         MessageContext.SERVLET_CONTEXT);
     webApplicationContext =
       WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext);
     return webApplicationContext;
    }
}
pihentagy
maybe you can use @PostConstruct to get the WebApplicationContext,so you getWebApplicationContext() is just one line.
Titi Wangsa bin Damhore