001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.activemq.command;
018    
019    import java.io.DataInputStream;
020    import java.io.DataOutputStream;
021    import java.io.IOException;
022    import java.io.InputStream;
023    import java.io.OutputStream;
024    import java.util.HashMap;
025    import java.util.zip.DeflaterOutputStream;
026    import java.util.zip.InflaterInputStream;
027    
028    import javax.jms.JMSException;
029    import javax.jms.MessageNotWriteableException;
030    import javax.jms.TextMessage;
031    
032    import org.apache.activemq.ActiveMQConnection;
033    import org.apache.activemq.util.ByteArrayInputStream;
034    import org.apache.activemq.util.ByteArrayOutputStream;
035    import org.apache.activemq.util.ByteSequence;
036    import org.apache.activemq.util.JMSExceptionSupport;
037    import org.apache.activemq.util.MarshallingSupport;
038    import org.apache.activemq.wireformat.WireFormat;
039    
040    /**
041     * @openwire:marshaller code="28"
042     * @version $Revision$
043     */
044    public class ActiveMQTextMessage extends ActiveMQMessage implements TextMessage {
045    
046        public static final byte DATA_STRUCTURE_TYPE = CommandTypes.ACTIVEMQ_TEXT_MESSAGE;
047    
048        protected String text;
049    
050        public Message copy() {
051            ActiveMQTextMessage copy = new ActiveMQTextMessage();
052            copy(copy);
053            return copy;
054        }
055    
056        private void copy(ActiveMQTextMessage copy) {
057            super.copy(copy);
058            copy.text = text;
059        }
060    
061        public byte getDataStructureType() {
062            return DATA_STRUCTURE_TYPE;
063        }
064    
065        public String getJMSXMimeType() {
066            return "jms/text-message";
067        }
068    
069        public void setText(String text) throws MessageNotWriteableException {
070            checkReadOnlyBody();
071            this.text = text;
072            setContent(null);
073        }
074    
075        public String getText() throws JMSException {
076            if (text == null && getContent() != null) {
077                InputStream is = null;
078                try {
079                    ByteSequence bodyAsBytes = getContent();
080                    if (bodyAsBytes != null) {
081                        is = new ByteArrayInputStream(bodyAsBytes);
082                        if (isCompressed()) {
083                            is = new InflaterInputStream(is);
084                        }
085                        DataInputStream dataIn = new DataInputStream(is);
086                        text = MarshallingSupport.readUTF8(dataIn);
087                        dataIn.close();
088                        setContent(null);
089                    }
090                } catch (IOException ioe) {
091                    throw JMSExceptionSupport.create(ioe);
092                } finally {
093                    if (is != null) {
094                        try {
095                            is.close();
096                        } catch (IOException e) {
097                            // ignore
098                        }
099                    }
100                }
101            }
102            return text;
103        }
104    
105        public void beforeMarshall(WireFormat wireFormat) throws IOException {
106            super.beforeMarshall(wireFormat);
107    
108            ByteSequence content = getContent();
109            if (content == null && text != null) {
110                ByteArrayOutputStream bytesOut = new ByteArrayOutputStream();
111                OutputStream os = bytesOut;
112                ActiveMQConnection connection = getConnection();
113                if (connection != null && connection.isUseCompression()) {
114                    compressed = true;
115                    os = new DeflaterOutputStream(os);
116                }
117                DataOutputStream dataOut = new DataOutputStream(os);
118                MarshallingSupport.writeUTF8(dataOut, this.text);
119                dataOut.close();
120                setContent(bytesOut.toByteSequence());
121                //see https://issues.apache.org/activemq/browse/AMQ-2103
122                this.text=null;
123            }
124        }
125    
126        /**
127         * Clears out the message body. Clearing a message's body does not clear its
128         * header values or property entries. <p/>
129         * <P>
130         * If this message body was read-only, calling this method leaves the
131         * message body in the same state as an empty body in a newly created
132         * message.
133         * 
134         * @throws JMSException if the JMS provider fails to clear the message body
135         *                 due to some internal error.
136         */
137        public void clearBody() throws JMSException {
138            super.clearBody();
139            this.text = null;
140        }
141    
142        public int getSize() {
143            if (size == 0 && content == null && text != null) {
144                size = getMinimumMessageSize();
145                if (marshalledProperties != null) {
146                    size += marshalledProperties.getLength();
147                }
148                size = text.length() * 2;
149            }
150            return super.getSize();
151        }
152        
153        public String toString() {
154            try {
155                String text = getText();
156                    if (text != null && text.length() > 63) {
157                            text = text.substring(0, 45) + "..." + text.substring(text.length() - 12);
158                            HashMap<String, Object> overrideFields = new HashMap<String, Object>();
159                            overrideFields.put("text", text);
160                            return super.toString(overrideFields);
161                    }
162            } catch (JMSException e) {
163            }
164            return super.toString();
165        }
166    }