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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.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.apache.tuscany.sca.assembly.Endpoint;
import org.apache.tuscany.sca.assembly.EndpointReference;
import org.apache.tuscany.sca.context.CompositeContext;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.invocation.Invoker;
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.node.NodeFactory;
import org.apache.tuscany.sca.provider.EndpointAsyncProvider;
import org.apache.tuscany.sca.runtime.DomainRegistryFactory;
import org.apache.tuscany.sca.runtime.EndpointRegistry;
import org.apache.tuscany.sca.runtime.ExtensibleDomainRegistryFactory;
import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
import org.apache.tuscany.sca.runtime.RuntimeEndpointReference;
import org.oasisopen.sca.ComponentContext;
/**
* A class that wraps the mechanics for sending async responses
* and hides the decision about whether the response will be processed
* natively or non-natively
*
* This class is generic, based on the type of targetAddress information required by
* the Binding that creates it
*/
public class AsyncResponseInvoker<T> implements InvokerAsyncResponse, Serializable {
/**
*
*/
private static final long serialVersionUID = -7992598227671386588L;
private RuntimeEndpoint requestEndpoint;
private RuntimeEndpointReference responseEndpointReference;
private T responseTargetAddress;
private String relatesToMsgID;
private String operationName;
private MessageFactory messageFactory;
private String bindingType = "";
private boolean isNativeAsync;
public AsyncResponseInvoker(RuntimeEndpoint requestEndpoint,
RuntimeEndpointReference responseEndpointReference,
T responseTargetAddress, String relatesToMsgID,
String operationName, MessageFactory messageFactory) {
super();
this.requestEndpoint = requestEndpoint;
this.responseEndpointReference = responseEndpointReference;
this.responseTargetAddress = responseTargetAddress;
this.relatesToMsgID = relatesToMsgID;
this.operationName = operationName;
this.messageFactory = messageFactory;
if ((requestEndpoint.getBindingProvider() instanceof EndpointAsyncProvider) &&
(((EndpointAsyncProvider)requestEndpoint.getBindingProvider()).supportsNativeAsync())){
isNativeAsync = true;
} else {
isNativeAsync = false;
} // end if
} // end constructor
/**
* If you have a Tuscany message you can call this
*/
public void invokeAsyncResponse(Message responseMessage) {
responseMessage.getHeaders().put(Constants.ASYNC_RESPONSE_INVOKER, this);
responseMessage.getHeaders().put(Constants.RELATES_TO, relatesToMsgID);
if (isNativeAsync){
// process the response as a native async response
requestEndpoint.invokeAsyncResponse(responseMessage);
} else {
// process the response as a non-native async response
responseEndpointReference.invoke(responseMessage);
}
} // end method invokeAsyncReponse(Message)
public T getResponseTargetAddress() {
return responseTargetAddress;
}
public void setResponseTargetAddress(T responseTargetAddress) {
this.responseTargetAddress = responseTargetAddress;
}
public String getRelatesToMsgID() {
return relatesToMsgID;
}
public void setRelatesToMsgID(String relatesToMsgID) {
this.relatesToMsgID = relatesToMsgID;
}
/**
* Invokes the async response where the parameter is Java bean(s)
* - this method creates a Tuscany message
*
* @param args the response data
*/
public void invokeAsyncResponse(Object args) {
Message msg = messageFactory.createMessage();
msg.setOperation(getOperation( args ));
// If this is not native async, then any Throwable is being passed as a parameter and
// requires wrapping
if( !isNativeAsync && args instanceof Throwable ) {
args = new AsyncFaultWrapper( (Throwable) args );
} // end if
// If this is not native async, then the message must contain an array of args since
// this is what is expected when invoking an EPR for the async response...
if( !isNativeAsync ) {
Object[] objs = new Object[1];
objs[0] = args;
args = objs;
} // end if
msg.setTo(requestEndpoint);
msg.setFrom(responseEndpointReference);
if( args instanceof Throwable ) {
msg.setFaultBody(args);
} else {
msg.setBody(args);
} // end if
invokeAsyncResponse(msg);
} // end method invokeAsyncResponse(Object)
private Operation getOperation( Object args ) {
if( isNativeAsync ) {
List<Operation> ops = requestEndpoint.getService().getInterfaceContract().getInterface().getOperations();
for (Operation op : ops) {
if( operationName.equals(op.getName()) ) return op;
} // end for
return null;
} else {
operationName = "setResponse";
if( args instanceof Throwable ) { operationName = "setWrappedFault"; }
List<Operation> ops = responseEndpointReference.getReference().getInterfaceContract().getInterface().getOperations();
for (Operation op : ops) {
if( operationName.equals(op.getName()) ) return op;
} // end for
return null;
} // end if
} // end getOperation
public void setBindingType(String bindingType) {
this.bindingType = bindingType;
} // end method setBindingType
public String getBindingType() {
return bindingType;
} // end method getBindingType
public RuntimeEndpoint getRequestEndpoint() {
return this.requestEndpoint;
}
public RuntimeEndpointReference getResponseEndpointReference() {
return this.responseEndpointReference;
}
public void setResponseEndpointReference(
RuntimeEndpointReference responseEndpointReference) {
this.responseEndpointReference = responseEndpointReference;
}
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException
{
in.defaultReadObject();
// find the real endpoint
ExtensionPointRegistry extensionPointRegistry = NodeFactory.getInstance().getExtensionPointRegistry();
DomainRegistryFactory domainRegistryFactory = ExtensibleDomainRegistryFactory.getInstance(extensionPointRegistry);
Collection<EndpointRegistry> endpointRegistries = domainRegistryFactory.getEndpointRegistries();
EndpointRegistry endpointRegistry = endpointRegistries.iterator().next();
List<Endpoint> endpoints = endpointRegistry.findEndpoint(requestEndpoint.getURI());
requestEndpoint = (RuntimeEndpoint)endpoints.get(0);
if (responseTargetAddress instanceof EndpointReference){
// fix the target as in this case it will be an EPR
EndpointReference epr = (EndpointReference)responseTargetAddress;
List<EndpointReference> endpointReferences = endpointRegistry.getEndpointReferences();
for (EndpointReference endpointReference : endpointReferences){
if (endpointReference.getURI().equals(epr.getURI())){
responseTargetAddress = (T)endpointReference;
}
}
}
}
} // end class
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