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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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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.activemq.artemis.jms.client;

import javax.jms.JMSException;
import javax.jms.MessageFormatException;
import javax.jms.ObjectMessage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import org.apache.activemq.artemis.api.core.ActiveMQException;
import org.apache.activemq.artemis.api.core.Message;
import org.apache.activemq.artemis.api.core.client.ClientMessage;
import org.apache.activemq.artemis.api.core.client.ClientSession;
import org.apache.activemq.artemis.utils.ObjectInputStreamWithClassLoader;

/**
 * ActiveMQ Artemis implementation of a JMS ObjectMessage.
 * 

 * Don't used ObjectMessage if you want good performance!
 * 
 * Serialization is slooooow!
 */
public class ActiveMQObjectMessage extends ActiveMQMessage implements ObjectMessage {
   // Constants -----------------------------------------------------

   public static final byte TYPE = Message.OBJECT_TYPE;

   // Attributes ----------------------------------------------------

   // keep a snapshot of the Serializable Object as a byte[] to provide Object isolation
   private byte[] data;

   // Static --------------------------------------------------------

   // Constructors --------------------------------------------------

   protected ActiveMQObjectMessage(final ClientSession session) {
      super(ActiveMQObjectMessage.TYPE, session);
   }

   protected ActiveMQObjectMessage(final ClientMessage message, final ClientSession session) {
      super(message, session);
   }

   /**
    * A copy constructor for foreign JMS ObjectMessages.
    */
   public ActiveMQObjectMessage(final ObjectMessage foreign, final ClientSession session) throws JMSException {
      super(foreign, ActiveMQObjectMessage.TYPE, session);

      setObject(foreign.getObject());
   }

   // Public --------------------------------------------------------

   @Override
   public byte getType() {
      return ActiveMQObjectMessage.TYPE;
   }

   @Override
   public void doBeforeSend() throws Exception {
      message.getBodyBuffer().clear();
      if (data != null) {
         message.getBodyBuffer().writeInt(data.length);
         message.getBodyBuffer().writeBytes(data);
      }

      super.doBeforeSend();
   }

   @Override
   public void doBeforeReceive() throws ActiveMQException {
      super.doBeforeReceive();
      try {
         int len = message.getBodyBuffer().readInt();
         data = new byte[len];
         message.getBodyBuffer().readBytes(data);
      }
      catch (Exception e) {
         data = null;
      }

   }

   // ObjectMessage implementation ----------------------------------

   public void setObject(final Serializable object) throws JMSException {
      checkWrite();

      if (object != null) {
         try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream(1024);

            ObjectOutputStream oos = new ObjectOutputStream(baos);

            oos.writeObject(object);

            oos.flush();

            data = baos.toByteArray();
         }
         catch (Exception e) {
            JMSException je = new JMSException("Failed to serialize object");
            je.setLinkedException(e);
            je.initCause(e);
            throw je;
         }
      }
   }

   // lazy deserialize the Object the first time the client requests it
   public Serializable getObject() throws JMSException {
      if (data == null || data.length == 0) {
         return null;
      }

      try {
         ByteArrayInputStream bais = new ByteArrayInputStream(data);
         ObjectInputStream ois = new ObjectInputStreamWithClassLoader(bais);
         Serializable object = (Serializable) ois.readObject();
         return object;
      }
      catch (Exception e) {
         JMSException je = new JMSException(e.getMessage());
         je.setStackTrace(e.getStackTrace());
         throw je;
      }
   }

   @Override
   public void clearBody() throws JMSException {
      super.clearBody();

      data = null;
   }

   @Override
   protected  T getBodyInternal(Class c) throws MessageFormatException {
      try {
         return (T) getObject();
      }
      catch (JMSException e) {
         throw new MessageFormatException("Deserialization error on ActiveMQObjectMessage");
      }
   }

   @Override
   public boolean isBodyAssignableTo(@SuppressWarnings("rawtypes") Class c) {
      if (data == null) // we have no body
         return true;
      try {
         return Serializable.class == c || Object.class == c || c.isInstance(getObject());
      }
      catch (JMSException e) {
         return false;
      }
   }
}