I LOVE OPEN SOURCE
It worked :)
just need to call following from service implementation when another
response needs to be sent (as long as you keep calling this your
method will get reinvoked to handle this incoming request; so you can
send as many responses to each request as you want)
JMSDestination.abrStatus.set(new Boolean(true));
modified code from JMSDestination:
-----------------------------------------------------------------------------------------
public static ThreadLocal<Boolean> abrStatus = new ThreadLocal<Boolean>() {
@Override
protected synchronized Boolean initialValue() {
return new Boolean(false);
}
};
protected class JMSExecutor implements Runnable {
javax.jms.Message message;
JMSExecutor(javax.jms.Message m) {
message = m;
}
public void run() {
long abrCount = 0;
do {
getLogger().log(Level.INFO, "run the incoming message
in the threadpool");
JMSDestination.abrStatus.set(new Boolean(false));
getLogger().log(Level.INFO, "abr count for
message("+Thread.currentThread()+"): "+abrCount);
abrCount++;
try {
incoming(message);
} catch (IOException ex) {
// TODO: Decide what to do if we receive the exception.
getLogger().log(Level.WARNING, "Failed to process
incoming message : ", ex);
break;
}
} while(JMSDestination.abrStatus.get().booleanValue());
}
}
-----------------------------------------------------------------------------------------
Regards
Mayank
On 1/15/08, Mayank Thakore <[EMAIL PROTECTED]> wrote:
> Well, it didn't work. The interceptors mutate the message and won't process
> the mutated one.
>
> So I am going to try changing the JMSDestination.incoming code to resend the
> message as many times as required.
>
> Any thoughts?
>
> Regards
> Mayank
>
> -----Original Message-----
> From: Mayank Thakore [mailto:[EMAIL PROTECTED]
> Sent: Sunday, January 13, 2008 23:09
> To: [email protected]
> Subject: ABR Communication Pattern
>
> Hi,
>
> I was trying to achieve Asynchronous Batch Response (ABR) pattern with
> CXF for JMS transport. ABR means user can send multiple responses to a
> single request.
>
> Please read this and let me know what you think.
>
> Hazard info: I haven't finished the client for this yet, so don't know
> wheather it is working. It does print the cxf logs correctly.
>
> Below is my interceptor code. It attaches to the end of the
> interceptor chain and executes the previous two interceptors which
> invoke the service implementation and send the out message
> respectively.
> ======================================================
>
> package ws.v1.tmf854;
>
> import java.util.ListIterator;
>
> import org.apache.cxf.interceptor.Fault;
> import org.apache.cxf.interceptor.Interceptor;
> import org.apache.cxf.message.Message;
> import org.apache.cxf.phase.AbstractPhaseInterceptor;
> import org.apache.cxf.phase.Phase;
>
> public class ABRInterceptor extends AbstractPhaseInterceptor<Message> {
>
> public ABRInterceptor() {
> super(Phase.POST_INVOKE);
> getAfter().add(
>
> org.apache.cxf.interceptor.OutgoingChainInterceptor.class
> .getName());
> }
>
> @Override
> public void handleMessage(Message message) throws Fault {
> System.out.println("ABRInterceptor invoked");
> if (ABRSession.isEnabled()) {
> executeReRuns(message);
> }
> }
>
> private void executeReRuns(Message message) {
> ListIterator<Interceptor<? extends Message>> iterator =
> prepareReRunIterator(message);
> while (ABRSession.isEnabled()) {
> ABRSession.disable();
> for (int i = 0; i < 2; i++) {
> iterator.previous();
> }
> for (int i = 0; i < 2; i++) {
> Interceptor currentInterceptor =
> iterator.next();
> currentInterceptor.handleMessage(message);
> }
> }
> }
>
> private ListIterator<Interceptor<? extends Message>>
> prepareReRunIterator(
> Message message) {
> ListIterator<Interceptor<? extends Message>> iterator =
> message
> .getInterceptorChain().getIterator();
> while (iterator.hasNext()) {
> iterator.next();
> }
> iterator.previous();
> return iterator;
> }
>
> }
>
>
>
> ======================================================
>
>
>
> Below is the session control device. It uses a thread local variable
> to remember if ABR session is enabled or disabled.
> ======================================================
>
> package ws.v1.tmf854;
>
> public class ABRSession {
>
> private static ThreadLocal<Boolean> status = new
> ThreadLocal<Boolean>() {
> @Override
> protected synchronized Boolean initialValue() {
> return new Boolean(false);
> }
> };
>
> public static synchronized boolean isEnabled() {
> return status.get().booleanValue();
> }
>
> public static synchronized void disable() {
> System.out.println("Disabling ABRSession");
> status.set(new Boolean(false));
>
> }
>
> public static synchronized void enable() {
> System.out.println("Enabling ABRSession");
> status.set(new Boolean(true));
>
> }
>
> }
>
>
>
> ======================================================
>
> So, if user wants ABR mode, they just need to invoke
> ABRSession.enable() inside the service implementation.
>
> Here is the server main for completion:
> ======================================================
>
> package ws.v1.tmf854;
>
> import javax.xml.ws.Endpoint;
>
> import org.apache.cxf.jaxws.EndpointImpl;
>
> /**
> * This class was generated by Apache CXF (incubator) 2.0.3-incubator Sat
> Jan 12
> * 11:10:39 IST 2008 Generated source version: 2.0.3-incubator
> *
> */
>
> public class AlarmRetrieval_AlarmRetrievalJms_Server {
>
> protected AlarmRetrieval_AlarmRetrievalJms_Server() throws Exception
> {
> System.out.println("Starting Server");
> Object implementor = new AlarmRetrievalImpl();
> String address = "jms://";
> EndpointImpl ep = (EndpointImpl) Endpoint.publish(address,
> implementor);
> ep.getServer().getEndpoint().getInInterceptors().add(
> new ABRInterceptor());
> }
>
> public static void main(String args[]) throws Exception {
> new AlarmRetrieval_AlarmRetrievalJms_Server();
> System.out.println("Server ready...");
>
> }
> }
>
>
> =========================================================
>
>
> So, what do you think?
>
> Thanks for any and all comments. Feel free to be critical.
>
> Mayank
>
>
>
