/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.wire;
import org.osoa.sca.CompositeContext;
import org.osoa.sca.CurrentCompositeContext;
import org.osoa.sca.SCA;
import org.osoa.sca.ServiceRuntimeException;
import org.apache.tuscany.spi.component.WorkContext;
import org.apache.tuscany.spi.services.work.WorkScheduler;
import org.apache.tuscany.spi.wire.Interceptor;
import org.apache.tuscany.spi.wire.Message;
import org.apache.tuscany.spi.wire.TargetInvoker;
/**
* Bridges interceptors in a non-blocking fashion between an {@link org.apache.tuscany.spi.wire.InboundInvocationChain}
* and an {@link org.apache.tuscany.spi.wire.OutboundInvocationChain} by using a {@link
* org.apache.tuscany.spi.component.WorkContext}.
*
* @version $$Rev: 462707 $$ $$Date: 2006-10-10 23:23:16 -0700 (Tue, 10 Oct 2006) $$
*/
public class NonBlockingBridgingInterceptor implements BridgingInterceptor {
private static final ContextBinder BINDER = new ContextBinder();
private static final Message RESPONSE = new ImmutableMessage();
private WorkScheduler workScheduler;
private WorkContext workContext;
private Interceptor next;
public NonBlockingBridgingInterceptor(WorkScheduler workScheduler, WorkContext workContext) {
this.workScheduler = workScheduler;
this.workContext = workContext;
}
public NonBlockingBridgingInterceptor(WorkScheduler workScheduler, WorkContext workContext, Interceptor next) {
this.workScheduler = workScheduler;
this.workContext = workContext;
this.next = next;
}
public Message invoke(final Message msg) {
final CompositeContext currentContext = CurrentCompositeContext.getContext();
// Schedule the invocation of the next interceptor in a new Work instance
try {
workScheduler.scheduleWork(new Runnable() {
public void run() {
workContext.setCurrentMessageId(null);
workContext.setCurrentCorrelationId(null);
CompositeContext oldContext = CurrentCompositeContext.getContext();
try {
BINDER.setContext(currentContext);
next.invoke(msg);
} catch (Exception e) {
// REVIEW uncomment when it is available
// monitor.executionError(e);
e.printStackTrace();
} finally {
BINDER.setContext(oldContext);
}
}
});
} catch (Exception e) {
throw new ServiceRuntimeException(e);
}
return RESPONSE;
}
public Interceptor getNext() {
return next;
}
public void setNext(Interceptor next) {
this.next = next;
}
public boolean isOptimizable() {
return true;
}
private static class ContextBinder extends SCA {
public void setContext(CompositeContext context) {
setCompositeContext(context);
}
public void start() {
throw new AssertionError();
}
public void stop() {
throw new AssertionError();
}
}
/**
* A dummy message passed back on an invocation
*/
private static class ImmutableMessage implements Message {
public Object getBody() {
return null;
}
public void setBody(Object body) {
throw new UnsupportedOperationException();
}
public void setTargetInvoker(TargetInvoker invoker) {
throw new UnsupportedOperationException();
}
public TargetInvoker getTargetInvoker() {
return null;
}
public Message getRelatedCallbackMessage() {
return null;
}
public Object getFromAddress() {
return null;
}
public void setFromAddress(Object fromAddress) {
throw new UnsupportedOperationException();
}
public Object getMessageId() {
return null;
}
public void setMessageId(Object messageId) {
throw new UnsupportedOperationException();
}
public Object getCorrelationId() {
return null;
}
public void setCorrelationId(Object correlationId) {
throw new UnsupportedOperationException();
}
public boolean isFault() {
return false;
}
public void setBodyWithFault(Object fault) {
throw new UnsupportedOperationException();
}
}
}