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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.jms.provider;
import java.io.Serializable;
import java.lang.reflect.InvocationTargetException;
import java.util.logging.Logger;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.ObjectMessage;
import javax.jms.Session;
import org.apache.tuscany.sca.binding.jms.JMSBinding;
import org.apache.tuscany.sca.binding.jms.JMSBindingException;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.oasisopen.sca.ServiceRuntimeException;
/**
* MessageProcessor for sending/receiving Serializable objects with the JMSBinding.
*
*/
public class ObjectMessageProcessor extends AbstractMessageProcessor {
private static final Logger logger = Logger.getLogger(ObjectMessageProcessor.class.getName());
public ObjectMessageProcessor(JMSBinding jmsBinding, ExtensionPointRegistry registry) {
super(jmsBinding);
}
@Override
protected Message createJMSMessage(Session session, Object o) {
if (session == null) {
logger.fine("no response session to create message: " + String.valueOf(o));
return null;
}
try {
ObjectMessage message = session.createObjectMessage();
if (o != null){
if (!(o instanceof Serializable)) {
throw new IllegalStateException("JMS ObjectMessage payload not Serializable: " + o);
}
message.setObject((Serializable)o);
}
return message;
} catch (JMSException e) {
throw new JMSBindingException(e);
}
}
@Override
public Object extractPayloadFromJMSMessage(Message msg) {
try {
Object o = ((ObjectMessage)msg).getObject();
if (o instanceof Throwable ) {
if (o instanceof RuntimeException) {
throw new ServiceRuntimeException("remote service exception, see nested exception", (RuntimeException)o);
} else {
return new InvocationTargetException((Throwable) o);
}
}
} catch (JMSException e) {
throw new JMSBindingException(e);
}
return extractPayload(msg);
}
@Override
protected Object extractPayload(Message msg) {
try {
return ((ObjectMessage)msg).getObject();
} catch (JMSException e) {
throw new JMSBindingException(e);
}
}
// special methods for handling operations with single parameters
public Message createJMSMessageForSingleParamOperation(Session session, Object o, boolean wrapSingleInput) {
if (session == null) {
logger.fine("no response session to create message: " + String.valueOf(o));
return null;
}
try {
ObjectMessage message = session.createObjectMessage();
if (o != null) {
if (!(o instanceof Serializable)) {
throw new IllegalStateException("JMS ObjectMessage payload not Serializable: " + o);
}
// If the user has specifically requests that single parameters
// be wrapped then leave is as is as it will have already been
// wrapped by Tuscany. Otherwise unwrap it.
if (wrapSingleInput) {
message.setObject((Serializable) o);
} else { // unwrap from array
message.setObject((Serializable) ((Object[]) o)[0]);
}
}
return message;
} catch (JMSException e) {
throw new JMSBindingException(e);
}
}
public Object extractPayloadFromJMSMessageForSingleParamOperation(Message msg, Class<?> argType, boolean wrapSingle) {
// We always have a one arg operation if this method is called so we need to
// decide if the data on the wire is wrapped or not. This is the algorithm.
//
// If the payload is null then create an empty array and pass it on
// If the payload is not an array then it must represent an unwrapped
// single arg. Wrap it up and pass it on
// If the payload is an array then determine if it's a wrapped single arg or not
// If the service interface arg type matches the type of the array and not it's contents
// then it's an unwrapped argument so wrap it and pass it on
// If the service interface arg type matches the type of the contents and not the type
// of the array then the parameter is already wrapped so pass it on as is
// If the service interface arg type matches both the type of the
// array and the type of its contents then assume that the whole array is the
// parameter and decide whether to unwrap it or pass it on as is based on the
// setting of the wrapSingle attribute
//
try {
Object payload = ((ObjectMessage) msg).getObject();
if (payload instanceof Throwable) {
if (payload instanceof RuntimeException) {
throw new ServiceRuntimeException("remote service exception, see nested exception", (RuntimeException) payload);
} else {
return new InvocationTargetException((Throwable) payload);
}
}
if (payload == null) {
// methodA(null) was not wrapped on wire so wrap it here in order
// that it passes through the rest of the Tuscany wire successfully
return new Object[] { payload };
}
boolean payloadIsArray = payload.getClass().isArray();
// Non-array payload is single arg
if (!payloadIsArray) {
// methodB(arg) wasn't wrapped on wire so wrap it here in order
// that it passes through the rest of the Tuscany wire successfully
return new Object[] { payload };
} else {
int size = ((Object[]) payload).length;
// An initial quick check to determine whether the payload is not
// wrapped. If the array has anything other than a single entry
// then it's not the result of reference side wrapping so wrap it
// here and pass it on
if (size != 1) {
return new Object[] { payload };
}
// we know the array has only one entry now so get it
Object arrayContents = ((Object[]) payload)[0];
// Is the operation argument the same type as the array itself?
if (argType.isAssignableFrom(payload.getClass())) {
// So we believe that the whole array is the argument but need
// to check what is in the array to be sure
if (arrayContents == null) {
// There is nothing in the array so it could be an accident that
// the array type matches the argument type, e.g. op(Object)
// so rely on the wrapSingle setting to choose
if (wrapSingle) {
return payload;
} else {
return new Object[] { payload };
}
} else if (argType.isAssignableFrom(arrayContents.getClass())) {
// We can't tell as the argument type matches both the array type and
// the array contents type so use the wrapSingle setting to choose
if (wrapSingle) {
return payload;
} else {
return new Object[] { payload };
}
} else {
// So by now we know the whole array is intended to be the
// parameter to wrap it and send it on
return new Object[] { payload };
}
} else {
// The array type doesn't match the argument type so assume that the
// array contents will match the argument type and that hence the
// parameter is already wrapped so just send it as is. If the contents
// type doesn't match the argument type a exception will be thrown further
// along the wire
return payload;
}
}
} catch (JMSException e) {
throw new JMSBindingException(e);
}
}
}
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