org.apache.activemq.artemis.jms.client.ActiveMQTextMessage Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS 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 jakarta.jms.JMSException;
import jakarta.jms.TextMessage;

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

import static org.apache.activemq.artemis.reader.TextMessageUtil.readBodyText;
import static org.apache.activemq.artemis.reader.TextMessageUtil.writeBodyText;

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

 * This class was ported from SpyTextMessage in JBossMQ.
 */
public class ActiveMQTextMessage extends ActiveMQMessage implements TextMessage {

   public static final byte TYPE = Message.TEXT_TYPE;


   // We cache it locally - it's more performant to cache as a SimpleString, the AbstractChannelBuffer write
   // methods are more efficient for a SimpleString
   private SimpleString text;


   public ActiveMQTextMessage(final ClientSession session) {
      super(ActiveMQTextMessage.TYPE, session);
   }

   public ActiveMQTextMessage(final ClientMessage message, final ClientSession session) {
      super(message, session);
   }

   /**
    * A copy constructor for non-ActiveMQ Artemis JMS TextMessages.
    */
   public ActiveMQTextMessage(final TextMessage foreign, final ClientSession session) throws JMSException {
      super(foreign, ActiveMQTextMessage.TYPE, session);

      setText(foreign.getText());
   }


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

   // TextMessage implementation ------------------------------------

   @Override
   public void setText(final String text) throws JMSException {
      checkWrite();

      if (text != null) {
         this.text = SimpleString.of(text);
      } else {
         this.text = null;
      }

      writeBodyText(message.getBodyBuffer(), this.text);
   }

   @Override
   public String getText() {
      if (text != null) {
         return text.toString();
      } else {
         return null;
      }
   }

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

      text = null;
   }

   // ActiveMQRAMessage override -----------------------------------------

   @Override
   public void doBeforeReceive() throws ActiveMQException {
      super.doBeforeReceive();

      text = readBodyText(message.getBodyBuffer());
   }

   @Override
   protected  T getBodyInternal(Class c) {
      return (T) getText();
   }

   @Override
   @SuppressWarnings("unchecked")
   public boolean isBodyAssignableTo(Class c) {
      if (text == null)
         return true;
      return c.isAssignableFrom(java.lang.String.class);
   }
}