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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.implementation.java.invocation;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.apache.tuscany.sca.core.factory.InstanceWrapper;
import org.apache.tuscany.sca.core.factory.ObjectCreationException;
import org.apache.tuscany.sca.core.invocation.AsyncResponseException;
import org.apache.tuscany.sca.interfacedef.DataType;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.interfacedef.java.JavaOperation;
import org.apache.tuscany.sca.invocation.InterceptorAsync;
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.runtime.RuntimeComponent;
import org.apache.tuscany.sca.runtime.RuntimeComponentService;
import org.oasisopen.sca.ResponseDispatch;
import org.oasisopen.sca.ServiceRuntimeException;
/**
* Responsible for asynchronously dispatching an invocation to a Java component
* implementation instance
*
*/
public class JavaAsyncImplementationInvoker extends JavaImplementationInvoker implements InterceptorAsync {
public JavaAsyncImplementationInvoker(Operation operation, Method method, RuntimeComponent component, RuntimeComponentService service) {
super( operation, method, component, service);
assert method != null : "Operation method cannot be null";
assert ((JavaOperation) operation).isAsyncServer() : "Operation must be async";
} // end constructor
public Message invoke(Message msg) {
Operation op = this.operation;
Object payload = msg.getBody();
// Save the current thread context classloader
ClassLoader tccl = Thread.currentThread().getContextClassLoader();
try {
// The following call might create a new conversation, as a result, the msg.getConversationID() might
// return a new value
InstanceWrapper wrapper = scopeContainer.getWrapper(null);
Object instance = wrapper.getInstance();
// Set the TCCL to the classloader used to load the implementation class
Thread.currentThread().setContextClassLoader(instance.getClass().getClassLoader());
// For an async server method, there is an extra input parameter, which is a DispatchResponse instance
// which is typed by the type of the response
Class<?> responseType = op.getOutputType().getPhysical();
ResponseDispatch<?> dispatch = ResponseDispatchImpl.newInstance(responseType, msg );
Object ret;
Object[] payload2;
if (payload != null && !payload.getClass().isArray()) {
payload2 = new Object[2];
payload2[0] = payload;
} else {
payload2 = new Object[ ((Object[])payload).length + 1 ];
for( int i = 0; i < ((Object[])payload).length; i++) {
payload2[i] = ((Object[])payload)[i];
} // end for
}
payload2[ payload2.length - 1 ] = dispatch;
ret = method.invoke(instance, (Object[])payload2);
throw new InvocationTargetException( new AsyncResponseException("AsyncResponse") );
} catch (InvocationTargetException e) {
Throwable cause = e.getTargetException();
boolean isChecked = false;
for (DataType<?> d : operation.getFaultTypes()) {
if (d.getPhysical().isInstance(cause)) {
isChecked = true;
msg.setFaultBody(cause);
break;
}
} // end for
if (!isChecked) {
if (cause instanceof RuntimeException) {
throw (RuntimeException)cause;
}
if (cause instanceof Error) {
throw (Error)cause;
} else {
throw new ServiceRuntimeException(cause.getMessage(), cause);
}
} // end if
} catch (ObjectCreationException e) {
throw new ServiceRuntimeException(e.getMessage(), e);
} catch (Exception e) {
msg.setFaultBody(e);
} finally {
// set the tccl
Thread.currentThread().setContextClassLoader(tccl);
}
return msg;
} // end method invoke
protected Invoker next;
protected InvokerAsyncResponse previous;
public void setNext(Invoker next) {
this.next = next;
}
public Invoker getNext() {
return next;
}
public void invokeAsyncRequest(Message msg) throws Throwable {
processRequest(msg);
} // end method invokeAsyncRequest
public void invokeAsyncResponse(Message msg) {
msg = processResponse(msg);
InvokerAsyncResponse thePrevious = (InvokerAsyncResponse)getPrevious();
if (thePrevious != null ) thePrevious.invokeAsyncResponse(msg);
} // end method invokeAsyncResponse
public void setPrevious(InvokerAsyncResponse previous) {
this.previous = previous;
}
public InvokerAsyncResponse getPrevious() {
return previous;
}
public Message processRequest(Message msg) {
Operation op = this.operation;
Object payload = msg.getBody();
// Replace TCCL with the class loader used to load the java class as per SCA Spec
ClassLoader tccl = Thread.currentThread().getContextClassLoader();
try {
InstanceWrapper wrapper = scopeContainer.getWrapper(null);
Object instance = wrapper.getInstance();
// Set the TCCL to the classloader used to load the implementation class
Thread.currentThread().setContextClassLoader(instance.getClass().getClassLoader());
// For an async server method, there is an extra input parameter, which is a DispatchResponse instance
// which is typed by the type of the response
Class<?> responseType = op.getOutputType().getPhysical();
ResponseDispatch<?> dispatch = ResponseDispatchImpl.newInstance(responseType, msg );
Object[] payload2;
if (payload != null && !payload.getClass().isArray()) {
payload2 = new Object[2];
payload2[0] = payload;
} else {
payload2 = new Object[ ((Object[])payload).length + 1 ];
for( int i = 0; i < ((Object[])payload).length; i++) {
payload2[i] = ((Object[])payload)[i];
} // end for
}
payload2[ payload2.length - 1 ] = dispatch;
method.invoke(instance, (Object[])payload2);
} catch (InvocationTargetException e) {
Throwable cause = e.getTargetException();
boolean isChecked = false;
for (DataType<?> d : operation.getFaultTypes()) {
if (d.getPhysical().isInstance(cause)) {
isChecked = true;
// Ignore these errors since they should be returned asynchronously
break;
}
} // end for
if (!isChecked) {
if (cause instanceof RuntimeException) {
throw (RuntimeException)cause;
} // end if
if (cause instanceof Error) {
throw (Error)cause;
} else {
throw new ServiceRuntimeException(cause.getMessage(), cause);
} // end if
} // end if
} catch (Exception e) {
throw new ServiceRuntimeException(e.getMessage(), e);
} finally {
// set the tccl
Thread.currentThread().setContextClassLoader(tccl);
}
return msg;
} // end method processRequest
public Message postProcessRequest(Message msg) {
return msg;
}
public Message postProcessRequest(Message msg, Throwable e)
throws Throwable {
throw e;
}
public Message processResponse(Message msg) {
return msg;
} // end method processResponse
} // end class JavaAsyncImplementationInvoker
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