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/*
* 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.sca.core.invocation;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.apache.tuscany.sca.assembly.Binding;
import org.apache.tuscany.sca.core.assembly.RuntimeWireImpl;
import org.apache.tuscany.sca.core.context.CallableReferenceImpl;
import org.apache.tuscany.sca.core.conversation.ConversationState;
import org.apache.tuscany.sca.invocation.InvocationChain;
import org.apache.tuscany.sca.invocation.Message;
import org.apache.tuscany.sca.invocation.MessageFactory;
import org.apache.tuscany.sca.runtime.EndpointReference;
import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
import org.apache.tuscany.sca.runtime.RuntimeWire;
import org.osoa.sca.NoRegisteredCallbackException;
import org.osoa.sca.ServiceRuntimeException;
/**
* Responsible for dispatching to a callback through a wire. <p/> TODO cache
* target invoker
*
* @version $Rev$ $Date$
*/
public class JDKCallbackInvocationHandler extends JDKInvocationHandler {
private static final long serialVersionUID = -3350283555825935609L;
public JDKCallbackInvocationHandler(MessageFactory messageFactory, CallbackWireObjectFactory wireFactory) {
super(messageFactory, wireFactory);
this.fixedWire = false;
}
@Override
@SuppressWarnings( {"unchecked"})
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if (Object.class == method.getDeclaringClass()) {
return invokeObjectMethod(method, args);
}
// wire not pre-selected, so select a wire now to be used for the callback
Message msgContext = ThreadMessageContext.getMessageContext();
RuntimeWire wire = ((CallbackWireObjectFactory)callableReference).selectCallbackWire(msgContext);
if (wire == null) {
//FIXME: need better exception
throw new ServiceRuntimeException("No callback wire found for " + msgContext.getFrom().getURI());
}
// set the conversational state based on the interface that
// is specified for the reference that this wire belongs to
init(wire);
// set the conversation id into the conversation object. This is
// a special case for callbacks as, unless otherwise set manually,
// the callback should use the same conversation id as was received
// on the incoming call to this component
if (conversational) {
if (conversation == null || conversation.getState() == ConversationState.ENDED) {
conversation = null;
}
Object convID = conversation == null ? null : conversation.getConversationID();
// create a conversation id if one doesn't exist
// already, i.e. the conversation is just starting
if (convID == null) {
convID = msgContext.getTo().getReferenceParameters().getConversationID();
if (convID != null) {
conversation = ((RuntimeWireImpl)wire).getConversationManager().getConversation(convID);
if (callableReference != null) {
((CallableReferenceImpl)callableReference).attachConversation(conversation);
}
}
}
}
callbackID = msgContext.getTo().getReferenceParameters().getCallbackID();
((CallbackWireObjectFactory)callableReference).attachCallbackID(callbackID);
EndpointReference epr = msgContext.getTo().getReferenceParameters().getCallbackReference();
setEndpoint(epr);
// need to set the endpoint on the binding also so that when the chains are created next
// the sca binding can decide whether to provide local or remote invokers.
// TODO - there is a problem here though in that I'm setting a target on a
// binding that may possibly be trying to point at two things in the multi threaded
// case. Need to confirm the general model here and how the clone and bind part
// is intended to work
wire.getSource().getBinding().setURI(epr.getURI());
// also need to set the target contract as it varies for the sca binding depending on
// whether it is local or remote
RuntimeComponentReference ref = (RuntimeComponentReference)wire.getSource().getContract();
Binding binding = wire.getSource().getBinding();
wire.getTarget().setInterfaceContract(ref.getBindingProvider(binding).getBindingInterfaceContract());
//FIXME: can we use the same code as JDKInvocationHandler to select the chain?
InvocationChain chain = getInvocationChain(method, wire);
if (chain == null) {
throw new IllegalArgumentException("No matching operation is found: " + method);
}
try {
return invoke(chain, args, wire);
} catch (InvocationTargetException e) {
Throwable t = e.getCause();
if (t instanceof NoRegisteredCallbackException) {
throw t;
}
throw e;
}
}
}
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