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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tuscany.core.async.invocation;
import javax.resource.spi.work.Work;
import javax.resource.spi.work.WorkException;
import javax.resource.spi.work.WorkManager;
import org.apache.tuscany.core.message.Message;
import org.apache.tuscany.core.message.MessageFactory;
import org.apache.tuscany.core.wire.Interceptor;
import org.osoa.sca.CurrentModuleContext;
import org.osoa.sca.ModuleContext;
import org.osoa.sca.SCA;
import org.osoa.sca.ServiceRuntimeException;
/**
* A wire interceptor that uses a WorkManager to schedule asynchronous execution of invocations in Work instances.
*/
public class AsyncInterceptor implements Interceptor {
private static final ContextBinder BINDER = new ContextBinder();
private WorkManager workManager;
private MessageFactory messageFactory;
private Interceptor next;
/**
* Constructs a new instance
* @param workManager
*/
public AsyncInterceptor(WorkManager workManager, MessageFactory messageFactory) {
this.workManager=workManager;
this.messageFactory=messageFactory;
}
public Message invoke(final Message message) {
final ModuleContext currentModuleContext=CurrentModuleContext.getContext();
// Schedule the invocation of the next interceptor in a new Work instance
try {
workManager.scheduleWork(new Work() {
public void run() {
ModuleContext oldModuleContext=CurrentModuleContext.getContext();
try {
BINDER.setContext(currentModuleContext);
// Invoke the next interceptor
next.invoke(message);
} catch (Exception e) {
//FIXME How do we report exceptions?
e.printStackTrace();
} finally {
BINDER.setContext(oldModuleContext);
}
}
public void release() {
}
});
} catch (WorkException e) {
//FIXME Which exception should we throw here?
throw new ServiceRuntimeException(e);
}
// No return on a OneWay invocation.
return messageFactory.createMessage();
}
public void setNext(Interceptor next) {
this.next=next;
}
private static class ContextBinder extends SCA {
public void setContext(ModuleContext context) {
setModuleContext(context);
}
public void start() {
throw new AssertionError();
}
public void stop() {
throw new AssertionError();
}
}
}
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