org.apache.activemq.command.ActiveMQTextMessage Maven / Gradle / Ivy
Show all versions of activemq-osgi Show documentation
/**
* 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.command;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.InflaterInputStream;
import javax.jms.JMSException;
import javax.jms.MessageNotWriteableException;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.util.ByteArrayInputStream;
import org.apache.activemq.util.ByteArrayOutputStream;
import org.apache.activemq.util.ByteSequence;
import org.apache.activemq.util.JMSExceptionSupport;
import org.apache.activemq.util.MarshallingSupport;
import org.apache.activemq.wireformat.WireFormat;
/**
* @openwire:marshaller code="28"
*
*/
public class ActiveMQTextMessage extends ActiveMQMessage implements TextMessage {
public static final byte DATA_STRUCTURE_TYPE = CommandTypes.ACTIVEMQ_TEXT_MESSAGE;
protected String text;
@Override
public Message copy() {
ActiveMQTextMessage copy = new ActiveMQTextMessage();
copy(copy);
return copy;
}
private void copy(ActiveMQTextMessage copy) {
super.copy(copy);
copy.text = text;
}
@Override
public byte getDataStructureType() {
return DATA_STRUCTURE_TYPE;
}
@Override
public String getJMSXMimeType() {
return "jms/text-message";
}
@Override
public void setText(String text) throws MessageNotWriteableException {
checkReadOnlyBody();
this.text = text;
setContent(null);
}
@Override
public String getText() throws JMSException {
ByteSequence content = getContent();
if (text == null && content != null) {
text = decodeContent(content);
setContent(null);
setCompressed(false);
}
return text;
}
private String decodeContent(ByteSequence bodyAsBytes) throws JMSException {
String text = null;
if (bodyAsBytes != null) {
InputStream is = null;
try {
is = new ByteArrayInputStream(bodyAsBytes);
if (isCompressed()) {
is = new InflaterInputStream(is);
}
DataInputStream dataIn = new DataInputStream(is);
text = MarshallingSupport.readUTF8(dataIn);
dataIn.close();
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
} finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {
// ignore
}
}
}
}
return text;
}
@Override
public void beforeMarshall(WireFormat wireFormat) throws IOException {
super.beforeMarshall(wireFormat);
storeContentAndClear();
}
@Override
public void storeContentAndClear() {
storeContent();
text=null;
}
@Override
public void storeContent() {
try {
ByteSequence content = getContent();
String text = this.text;
if (content == null && text != null) {
ByteArrayOutputStream bytesOut = new ByteArrayOutputStream();
OutputStream os = bytesOut;
ActiveMQConnection connection = getConnection();
if (connection != null && connection.isUseCompression()) {
compressed = true;
os = new DeflaterOutputStream(os);
}
DataOutputStream dataOut = new DataOutputStream(os);
MarshallingSupport.writeUTF8(dataOut, text);
dataOut.close();
setContent(bytesOut.toByteSequence());
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
// see https://issues.apache.org/activemq/browse/AMQ-2103
// and https://issues.apache.org/activemq/browse/AMQ-2966
@Override
public void clearUnMarshalledState() throws JMSException {
super.clearUnMarshalledState();
this.text = null;
}
@Override
public boolean isContentMarshalled() {
return content != null || text == null;
}
/**
* Clears out the message body. Clearing a message's body does not clear its
* header values or property entries.
*
* If this message body was read-only, calling this method leaves the
* message body in the same state as an empty body in a newly created
* message.
*
* @throws JMSException if the JMS provider fails to clear the message body
* due to some internal error.
*/
@Override
public void clearBody() throws JMSException {
super.clearBody();
this.text = null;
}
@Override
public int getSize() {
String text = this.text;
if (size == 0 && content == null && text != null) {
size = getMinimumMessageSize();
if (marshalledProperties != null) {
size += marshalledProperties.getLength();
}
size += text.length() * 2;
}
return super.getSize();
}
@Override
public String toString() {
try {
String text = this.text;
if( text == null ) {
text = decodeContent(getContent());
}
if (text != null) {
text = MarshallingSupport.truncate64(text);
HashMap overrideFields = new HashMap();
overrideFields.put("text", text);
return super.toString(overrideFields);
}
} catch (JMSException e) {
}
return super.toString();
}
@SuppressWarnings("unchecked")
public boolean isBodyAssignableTo(Class c) throws JMSException {
/*
* If null the JMS spec says this method always returns true
* regardless of the passed in class type.
*/
if (getText() == null) {
return true;
}
return c.isAssignableFrom(java.lang.String.class);
}
@SuppressWarnings("unchecked")
protected T doGetBody(Class asType) throws JMSException {
return (T) getText();
}
}