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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.binding.sca.provider;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.core.invocation.AsyncResponseInvoker;
import org.apache.tuscany.sca.core.invocation.InterceptorAsyncImpl;
import org.apache.tuscany.sca.databinding.Mediator;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.invocation.InvocationChain;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.InvokerAsyncRequest;
import org.apache.tuscany.sca.invocation.InvokerAsyncResponse;
import org.apache.tuscany.sca.invocation.Message;
import org.apache.tuscany.sca.invocation.MessageFactory;
import org.apache.tuscany.sca.invocation.Phase;
import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
import org.apache.tuscany.sca.runtime.RuntimeEndpointReference;
/**
* @version $Rev$ $Date$
*/
public class SCABindingInvoker extends InterceptorAsyncImpl {
private InvocationChain chain;
private Mediator mediator;
private Operation sourceOperation;
private Operation targetOperation;
private boolean passByValue;
private RuntimeEndpointReference epr;
private RuntimeEndpoint ep;
private ExtensionPointRegistry registry;
/**
* Construct a SCABindingInvoker that delegates to the service invocation chain
*/
public SCABindingInvoker(InvocationChain chain, Operation sourceOperation, Mediator mediator,
boolean passByValue, RuntimeEndpointReference epr, ExtensionPointRegistry registry) {
super();
this.chain = chain;
this.mediator = mediator;
this.sourceOperation = sourceOperation;
this.targetOperation = chain.getTargetOperation();
this.passByValue = passByValue;
this.epr = epr;
this.ep = (RuntimeEndpoint)epr.getTargetEndpoint();
this.registry = registry;
}
/**
* @see org.apache.tuscany.sca.invocation.Interceptor#getNext()
*/
public Invoker getNext() {
return chain.getHeadInvoker(Phase.SERVICE_POLICY);
}
/**
* @see org.apache.tuscany.sca.invocation.Interceptor#setNext(org.apache.tuscany.sca.invocation.Invoker)
*/
public void setNext(Invoker next) {
// NOOP
}
public Message processRequest(Message msg){
if (passByValue) {
msg.setBody(mediator.copyInput(msg.getBody(), sourceOperation, targetOperation));
} // end if
ep.getInvocationChains();
if ( !ep.getCallbackEndpointReferences().isEmpty() ) {
RuntimeEndpointReference asyncEPR = (RuntimeEndpointReference) ep.getCallbackEndpointReferences().get(0);
// Place a link to the callback EPR into the message headers...
msg.getHeaders().put("ASYNC_CALLBACK", asyncEPR );
} // end if
if( ep.isAsyncInvocation() ) {
// Get the message ID
String msgID = (String)msg.getHeaders().get("MESSAGE_ID");
String operationName = msg.getOperation().getName();
// Create a response invoker and add it to the message headers
AsyncResponseInvoker<RuntimeEndpointReference> respInvoker =
new AsyncResponseInvoker<RuntimeEndpointReference>(ep, null, epr, msgID, operationName, getMessageFactory());
respInvoker.setBindingType("SCA_LOCAL");
msg.getHeaders().put("ASYNC_RESPONSE_INVOKER", respInvoker);
} // end if
return msg;
} // end method processRequest
/**
* Regular (sync) processing of response message
*/
public Message processResponse(Message msg){
if (passByValue) {
// Note source and target operation swapped so result is in source class loader
if (msg.isFault()) {
msg.setFaultBody(mediator.copyFault(msg.getBody(), sourceOperation, targetOperation));
} else {
if (sourceOperation.getOutputType() != null) {
msg.setBody(mediator.copyOutput(msg.getBody(), sourceOperation, targetOperation));
} // end if
} // end if
} // end if
return msg;
} // end method processResponse
public void invokeAsyncRequest(Message msg) throws Throwable {
try{
msg = processRequest(msg);
InvokerAsyncRequest theNext = (InvokerAsyncRequest)getNext();
if( theNext != null ) theNext.invokeAsyncRequest(msg);
postProcessRequest(msg);
} catch (Throwable e) {
postProcessRequest(msg, e);
} // end try
} // end method invokeAsyncRequest
public void invokeAsyncResponse(Message msg) {
msg = processResponse(msg);
// Handle async response Relates_To message ID value
@SuppressWarnings("unchecked")
AsyncResponseInvoker<RuntimeEndpointReference> respInvoker =
(AsyncResponseInvoker<RuntimeEndpointReference>)msg.getHeaders().get("ASYNC_RESPONSE_INVOKER");
// TODO - this deals with the Local case only - not distributed
if( respInvoker != null && "SCA_LOCAL".equals(respInvoker.getBindingType()) ) {
RuntimeEndpointReference responseEPR = respInvoker.getResponseTargetAddress();
msg.setFrom(responseEPR);
String msgID = respInvoker.getRelatesToMsgID();
msg.getHeaders().put("RELATES_TO", msgID);
} // end if
InvokerAsyncResponse thePrevious = (InvokerAsyncResponse)getPrevious();
if (thePrevious != null ) thePrevious.invokeAsyncResponse(msg);
} // end method invokeAsyncResponse
public boolean isLocalSCABIndingInvoker() {
return true;
}
private MessageFactory getMessageFactory() {
FactoryExtensionPoint modelFactories = registry.getExtensionPoint(FactoryExtensionPoint.class);
return modelFactories.getFactory(MessageFactory.class);
} // end method getMessageFactory
}
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