> -----Original Message----- > From: Eric Le Goff [mailto:[EMAIL PROTECTED] > Sent: 2007年11月28日 17:26 > To: cxf-user@incubator.apache.org > Subject: restful_jaxrs sample > > I was trying to understand to jaxrs frontend provided by CXF and the > restful_jaxrs demo helped a lot. > > Then I tried to write my own demo using the following ressource class : > > ==== > @javax.ws.rs.UriTemplate("/helloworld/{section}") > public class HelloWorldRessource { > > @javax.ws.rs.HttpMethod("GET") > @javax.ws.rs.UriTemplate("/{id}") > public String findBySectionAndId(@javax.ws.rs.UriParam("section") > String section, @javax.ws.rs.UriParam("id") > int id) { > return "Hello World - section is " + section + ", id is " + id + "\n"; > } > > } > ======= > > > If I hit the following url : http://localhost:9000/helloworld/main/23 > I get > <ns1:XMLFault> > <ns1:faultstring>java.lang.NullPointerException</ns1:faultstring> > </ns1:XMLFault> > > as a response. > > Here is the stack from the console : > > [java] Nov 28, 2007 10:01:47 AM > org.apache.cxf.phase.PhaseInterceptorChain doIntercept > [java] INFO: Interceptor has thrown exception, unwinding now > [java] java.lang.NullPointerException > [java] at > org.apache.cxf.jaxrs.interceptor.JAXRSDispatchInterceptor.handleMessage(J > AXRSDispatchInterceptor.java:101) > [java] at > org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorC > hain.java:207) > [java] at > org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiation > Observer.java:74) > [java] at > org.apache.cxf.transport.http_jetty.JettyHTTPDestination.serviceRequest(Jet > tyHTTPDestination.java:284) > [java] at > org.apache.cxf.transport.http_jetty.JettyHTTPDestination.doService(JettyHT > TPDestination.java:240) > [java] at > org.apache.cxf.transport.http_jetty.JettyHTTPHandler.handle(JettyHTTPHand > ler.java:54) > [java] at > org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:722) > [java] at > org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandler > Collection.java:206) > [java] at > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139) > [java] at org.mortbay.jetty.Server.handle(Server.java:324) > [...] > > > After a look at the source code, the class > org.apache.cxf.jaxrs.interceptor.JAXRSDispatchInterceptor doesn't > throw a Fault in its handleMessage method when no > OperationResourceInfo could be found > (the line is actually commented ) > > [...] > OperationResourceInfo ori = findTargetResource(resources, path, > httpMethod, values); > > if (ori == null) { > //throw new Fault(new > org.apache.cxf.common.i18n.Message("NO_OP", BUNDLE, method, path)); > } > [...] > > So my questions are : > > - Why is the handleMessage() method not controlling whether the > findTargetResource() returns null and give the newbie user like me an > explicit explanation of the problem ? ;)
There is still a lot of on-going work on the JAX-RS frontend. I started the exception part, but have not got this finished yet. See JIRA: http://issues.apache.org/jira/browse/CXF-1012 > - Why in my specific demo the findTargetResource had returned null ? > (I guess I will have to investigate with a step by step debug) ? > I believe this is because you don’t have following lines in your demo: //FIXME: wont work if remove this method, has to set hasSubResource to true @UriTemplate("/anyURLWilldo") public String anyMethodNameWillDo() { return null; } Actually this is a bug, just have not found time to fix it. Basically at the moment you need to have a resource method only marked with @UriTemplate (no @HttpMethod("") annotation). This tells jax-rs runtime this resource class has subResources. I hope I can have these hacks fixed next week. > > In the restful_jaxrs examples (CustomerService class), we have the use > of a JAXBElementProvider and of a JSONProvider. > I wonder if my above problem is not related to a missing > EntityProvider implementation since my method is returning a String ? > String type can be handled by JAX-RS runtime by default. > Thanks for your help > > > > > > -- > Eric Le Goff ---------------------------- IONA Technologies PLC (registered in Ireland) Registered Number: 171387 Registered Address: The IONA Building, Shelbourne Road, Dublin 4, Ireland
