AbstractMessageProcessor.java

/*
 * 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.PrintWriter;
import java.io.StringWriter;
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.JMSBindingConstants;
import org.apache.tuscany.sca.binding.jms.JMSBindingException;
import org.oasisopen.sca.ServiceRuntimeException;

/**
 * Base MessageProcessor for the JMSBinding.
 * 
 * @version $Rev$ $Date$
 */
public abstract class AbstractMessageProcessor implements JMSMessageProcessor {
    private static final Logger logger = Logger.getLogger(AbstractMessageProcessor.class.getName());

    protected String operationPropertyName;
    protected boolean xmlFormat = true;

    public AbstractMessageProcessor(JMSBinding jmsBinding) {
        this.operationPropertyName = jmsBinding.getOperationSelectorPropertyName();
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.tuscany.binding.jms.OperationAndDataBinding#getOperationName(javax.jms.Message)
     */
    public String getOperationName(Message message) {
        try {

            return message.getStringProperty(operationPropertyName);

        } catch (JMSException e) {
            throw new JMSBindingException("Exception retreiving operation name from message", e);
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.tuscany.binding.jms.OperationAndDataBinding#setOperationName(javax.jms.Message, java.lang.String)
     */
    public void setOperationName(String operationName, Message message) {
        try {

            message.setStringProperty(operationPropertyName, operationName);

        } catch (JMSException e) {
            throw new JMSBindingException("Exception setting the operation name on message", e);
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.tuscany.binding.jms.OperationAndDataBinding#extractPayload(javax.jms.Session, java.lang.Object)
     */
    public Message insertPayloadIntoJMSMessage(Session session, Object o) {
        return createJMSMessage(session, o);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.tuscany.binding.jms.OperationAndDataBinding#extractPayload(javax.jms.Message)
     */
    public Object extractPayloadFromJMSMessage(Message msg) {
        try {
            if (msg.getBooleanProperty(JMSBindingConstants.FAULT_PROPERTY)) {
                Object exc = ((ObjectMessage)msg).getObject();
                if (exc instanceof RuntimeException) {
                    throw new ServiceRuntimeException("remote service exception, see nested exception", (Throwable)exc);
                } else {
                    return new InvocationTargetException((Throwable) exc);
                }
            }
        } catch (JMSException e) {
            throw new JMSBindingException(e);
        }
        return extractPayload(msg);
    }

    public Message createFaultMessage(Session session, Throwable o) {
        if (session == null) {
            logger.fine("no response session to create fault message: " + String.valueOf(o));
            return null;
        }
        try {

            ObjectMessage message = session.createObjectMessage();
            if (o instanceof RuntimeException || o instanceof Error) {
                int recursionKlugeDetector = 20;
                Throwable rootCause = o;
                Throwable deepRootCause = rootCause.getCause();
                do {
                    if (rootCause == deepRootCause) {
                        break;
                    } else if (deepRootCause != null) {
                        rootCause = deepRootCause;
                    }

                    if (recursionKlugeDetector-- <= 0) {
                        break;
                    }
                } while (deepRootCause != null);

                final StringWriter sw = new StringWriter();
                final PrintWriter pw = new PrintWriter(sw);
                pw.print("Message = " + o.getMessage());
                StackTraceElement[] stackElements = o.getStackTrace();
                for (int i = 0; i < stackElements.length; i++) {
                        pw.print("\t>> \t at ");
                        pw.println(stackElements[i].toString());
                }
                pw.flush();

                message.setObject(new RuntimeException( sw.toString() ));
            } else {
                 message.setObject(o);
            }
            message.setBooleanProperty(JMSBindingConstants.FAULT_PROPERTY, true);
            return message;

        } catch (JMSException e) {
            throw new JMSBindingException(e);
        }
    }

    protected abstract Object extractPayload(Message msg);

    protected abstract Message createJMSMessage(Session session, Object o);

}