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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.assembly.EndpointReference;
import org.apache.tuscany.sca.core.factory.InstanceWrapper;
import org.apache.tuscany.sca.core.scope.ScopeContainer;
import org.apache.tuscany.sca.core.scope.ScopedRuntimeComponent;
import org.apache.tuscany.sca.implementation.java.JavaImplementation;
import org.apache.tuscany.sca.interfacedef.ConversationSequence;
import org.apache.tuscany.sca.interfacedef.DataType;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.interfacedef.java.impl.JavaInterfaceUtil;
import org.apache.tuscany.sca.invocation.DataExchangeSemantics;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.Message;
import org.apache.tuscany.sca.runtime.RuntimeComponent;
import org.oasisopen.sca.ServiceRuntimeException;
/**
* Responsible for synchronously dispatching an invocation to a Java component
* implementation instance
*
* @version $Rev$ $Date$
*/
public class JavaImplementationInvoker implements Invoker, DataExchangeSemantics {
protected Operation operation;
protected Method method;
protected boolean allowsPBR;
@SuppressWarnings("unchecked")
protected final ScopeContainer scopeContainer;
public JavaImplementationInvoker(Operation operation, Method method, RuntimeComponent component) {
assert method != null : "Operation method cannot be null";
this.method = method;
this.operation = operation;
this.scopeContainer = ((ScopedRuntimeComponent)component).getScopeContainer();
this.allowsPBR = ((JavaImplementation)component.getImplementation()).isAllowsPassByReference(method);
}
public JavaImplementationInvoker(Operation operation, RuntimeComponent component) {
// used if the method can't be computed statically in advance
this.operation = operation;
this.scopeContainer = ((ScopedRuntimeComponent)component).getScopeContainer();
}
@SuppressWarnings("unchecked")
public Message invoke(Message msg) {
Operation op = msg.getOperation();
if (op == null) {
op = this.operation;
}
ConversationSequence sequence = op.getConversationSequence();
Object payload = msg.getBody();
Object contextId = null;
EndpointReference from = msg.getFrom();
try {
// The following call might create a new conversation, as a result, the msg.getConversationID() might
// return a new value
InstanceWrapper wrapper = scopeContainer.getWrapper(contextId);
Object instance = wrapper.getInstance();
// If the method couldn't be computed statically, or the instance being
// invoked is a user-specified callback object that doesn't implement
// the service interface from which the reflective method was obtained,
// compute the method object dynamically for this invocation.
Method imethod = method;
if (imethod == null || !imethod.getDeclaringClass().isInstance(instance)) {
try {
imethod = JavaInterfaceUtil.findMethod(instance.getClass(), operation);
} catch (NoSuchMethodException e) {
throw new IllegalArgumentException("Callback object does not provide method " + e.getMessage());
}
}
Object ret;
if (payload != null && !payload.getClass().isArray()) {
ret = imethod.invoke(instance, payload);
} else {
ret = imethod.invoke(instance, (Object[])payload);
}
scopeContainer.returnWrapper(wrapper, contextId);
msg.setBody(ret);
} 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;
}
}
if (sequence != ConversationSequence.CONVERSATION_NONE ){
try {
// // If the exception is not a business exception then end the conversation
// boolean businessException = false;
//
// for (DataType dataType : operation.getFaultTypes()){
// if ((dataType.getPhysical() == e.getCause().getClass()) &&
// (contextId != null) ){
// businessException = true;
// break;
// }
// }
if (!isChecked && contextId != null) {
scopeContainer.remove(contextId);
}
} catch (Exception ex){
// TODO - sure what the best course of action is here. We have
// a system exception in the middle of a business exception
}
}
if (!isChecked) {
if (cause instanceof RuntimeException) {
throw (RuntimeException)cause;
}
if (cause instanceof Error) {
throw (Error)cause;
} else {
throw new ServiceRuntimeException(cause.getMessage(), cause);
}
}
} catch (Exception e) {
msg.setFaultBody(e);
}
return msg;
}
public boolean allowsPassByReference() {
return allowsPBR;
}
}
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