/**
* 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.cxf.interceptor;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executor;
import java.util.concurrent.FutureTask;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.cxf.endpoint.Endpoint;
import org.apache.cxf.message.Exchange;
import org.apache.cxf.message.Message;
import org.apache.cxf.message.MessageContentsList;
import org.apache.cxf.message.MessageImpl;
import org.apache.cxf.phase.AbstractPhaseInterceptor;
import org.apache.cxf.phase.Phase;
import org.apache.cxf.phase.PhaseInterceptorChain;
import org.apache.cxf.service.Service;
import org.apache.cxf.service.invoker.Invoker;
/**
* Invokes a Binding's invoker with the <code>INVOCATION_INPUT</code> from
* the Exchange.
*/
public class ServiceInvokerInterceptor extends AbstractPhaseInterceptor<Message> {
public ServiceInvokerInterceptor() {
super(Phase.INVOKE);
}
public void handleMessage(final Message message) {
final Exchange exchange = message.getExchange();
final Endpoint endpoint = exchange.get(Endpoint.class);
final Service service = endpoint.getService();
final Invoker invoker = service.getInvoker();
Runnable invocation = new Runnable() {
public void run() {
Exchange runableEx = message.getExchange();
Object result = invoker.invoke(runableEx, getInvokee(message));
if (!exchange.isOneWay()) {
Endpoint ep = exchange.get(Endpoint.class);
Message outMessage = runableEx.getOutMessage();
if (outMessage == null) {
outMessage = new MessageImpl();
outMessage.setExchange(exchange);
outMessage = ep.getBinding().createMessage(outMessage);
exchange.setOutMessage(outMessage);
}
copyJaxwsProperties(message, outMessage);
if (result != null) {
MessageContentsList resList = null;
if (result instanceof MessageContentsList) {
resList = (MessageContentsList)result;
} else if (result instanceof List) {
resList = new MessageContentsList((List<?>)result);
} else if (result.getClass().isArray()) {
resList = new MessageContentsList((Object[])result);
} else {
outMessage.setContent(Object.class, result);
}
if (resList != null) {
outMessage.setContent(List.class, resList);
}
}
}
}
};
Executor executor = getExecutor(endpoint);
Executor executor2 = exchange.get(Executor.class);
if (executor2 == executor || executor == null
|| !(message.getInterceptorChain() instanceof PhaseInterceptorChain)) {
// already executing on the appropriate executor
invocation.run();
} else {
exchange.put(Executor.class, executor);
// The current thread holds the lock on PhaseInterceptorChain.
// In order to avoid the executor threads deadlocking on any of
// synchronized PhaseInterceptorChain methods the current thread
// needs to release the chain lock and re-acquire it after the
// executor thread is done
final PhaseInterceptorChain chain = (PhaseInterceptorChain)message.getInterceptorChain();
final AtomicBoolean contextSwitched = new AtomicBoolean();
final FutureTask<Object> o = new FutureTask<Object>(invocation, null) {
@Override
protected void done() {
super.done();
if (contextSwitched.get()) {
PhaseInterceptorChain.setCurrentMessage(chain, null);
message.remove(Message.THREAD_CONTEXT_SWITCHED);
}
chain.releaseChain();
}
@Override
public void run() {
if (PhaseInterceptorChain.setCurrentMessage(chain, message)) {
contextSwitched.set(true);
message.put(Message.THREAD_CONTEXT_SWITCHED, true);
}
synchronized (chain) {
super.run();
}
}
};
synchronized (chain) {
executor.execute(o);
// the task will already be done if the executor uses the current thread
// but the chain lock status still needs to be re-set
chain.releaseAndAcquireChain();
}
try {
o.get();
} catch (InterruptedException e) {
throw new Fault(e);
} catch (ExecutionException e) {
if (e.getCause() instanceof RuntimeException) {
throw (RuntimeException)e.getCause();
} else {
throw new Fault(e.getCause());
}
}
}
}
private Object getInvokee(Message message) {
Object invokee = message.getContent(List.class);
if (invokee == null) {
invokee = message.getContent(Object.class);
}
return invokee;
}
/**
* Get the Executor for this invocation.
* @param endpoint
* @return
*/
private Executor getExecutor(final Endpoint endpoint) {
return endpoint.getService().getExecutor();
}
private void copyJaxwsProperties(Message inMsg, Message outMsg) {
outMsg.put(Message.WSDL_OPERATION, inMsg.get(Message.WSDL_OPERATION));
outMsg.put(Message.WSDL_SERVICE, inMsg.get(Message.WSDL_SERVICE));
outMsg.put(Message.WSDL_INTERFACE, inMsg.get(Message.WSDL_INTERFACE));
outMsg.put(Message.WSDL_PORT, inMsg.get(Message.WSDL_PORT));
outMsg.put(Message.WSDL_DESCRIPTION, inMsg.get(Message.WSDL_DESCRIPTION));
}
}