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.transport.stomp;
018
019 import java.io.DataOutputStream;
020 import java.io.IOException;
021 import java.util.HashMap;
022 import java.util.Map;
023
024 import javax.jms.Destination;
025 import javax.jms.JMSException;
026
027 import org.apache.activemq.advisory.AdvisorySupport;
028 import org.apache.activemq.command.ActiveMQBytesMessage;
029 import org.apache.activemq.command.ActiveMQDestination;
030 import org.apache.activemq.command.ActiveMQMessage;
031 import org.apache.activemq.command.ActiveMQTextMessage;
032 import org.apache.activemq.command.DataStructure;
033 import org.apache.activemq.util.ByteArrayOutputStream;
034 import org.apache.activemq.util.ByteSequence;
035
036 import com.thoughtworks.xstream.XStream;
037 import com.thoughtworks.xstream.io.json.JsonHierarchicalStreamDriver;
038
039 /**
040 * Implements ActiveMQ 4.0 translations
041 */
042 public class LegacyFrameTranslator implements FrameTranslator {
043
044
045 public ActiveMQMessage convertFrame(ProtocolConverter converter, StompFrame command) throws JMSException, ProtocolException {
046 final Map<?, ?> headers = command.getHeaders();
047 final ActiveMQMessage msg;
048 /*
049 * To reduce the complexity of this method perhaps a Chain of Responsibility
050 * would be a better implementation
051 */
052 if (headers.containsKey(Stomp.Headers.AMQ_MESSAGE_TYPE)) {
053 String intendedType = (String)headers.get(Stomp.Headers.AMQ_MESSAGE_TYPE);
054 if(intendedType.equalsIgnoreCase("text")){
055 ActiveMQTextMessage text = new ActiveMQTextMessage();
056 try {
057 //text.setText(new String(command.getContent(), "UTF-8"));
058 ByteArrayOutputStream bytes = new ByteArrayOutputStream(command.getContent().length + 4);
059 DataOutputStream data = new DataOutputStream(bytes);
060 data.writeInt(command.getContent().length);
061 data.write(command.getContent());
062 text.setContent(bytes.toByteSequence());
063 } catch (Throwable e) {
064 throw new ProtocolException("Text could not bet set: " + e, false, e);
065 }
066 msg = text;
067 } else if(intendedType.equalsIgnoreCase("bytes")) {
068 ActiveMQBytesMessage byteMessage = new ActiveMQBytesMessage();
069 byteMessage.writeBytes(command.getContent());
070 msg = byteMessage;
071 } else {
072 throw new ProtocolException("Unsupported message type '"+intendedType+"'",false);
073 }
074 }else if (headers.containsKey(Stomp.Headers.CONTENT_LENGTH)) {
075 headers.remove(Stomp.Headers.CONTENT_LENGTH);
076 ActiveMQBytesMessage bm = new ActiveMQBytesMessage();
077 bm.writeBytes(command.getContent());
078 msg = bm;
079 } else {
080 ActiveMQTextMessage text = new ActiveMQTextMessage();
081 try {
082 //text.setText(new String(command.getContent(), "UTF-8"));
083 ByteArrayOutputStream bytes = new ByteArrayOutputStream(command.getContent().length + 4);
084 DataOutputStream data = new DataOutputStream(bytes);
085 data.writeInt(command.getContent().length);
086 data.write(command.getContent());
087 text.setContent(bytes.toByteSequence());
088 } catch (Throwable e) {
089 throw new ProtocolException("Text could not bet set: " + e, false, e);
090 }
091 msg = text;
092 }
093 FrameTranslator.Helper.copyStandardHeadersFromFrameToMessage(converter, command, msg, this);
094 return msg;
095 }
096
097 public StompFrame convertMessage(ProtocolConverter converter, ActiveMQMessage message) throws IOException, JMSException {
098 StompFrame command = new StompFrame();
099 command.setAction(Stomp.Responses.MESSAGE);
100 Map<String, String> headers = new HashMap<String, String>(25);
101 command.setHeaders(headers);
102
103 FrameTranslator.Helper.copyStandardHeadersFromMessageToFrame(converter, message, command, this);
104
105 if (message.getDataStructureType() == ActiveMQTextMessage.DATA_STRUCTURE_TYPE) {
106
107 if (!message.isCompressed() && message.getContent() != null) {
108 ByteSequence msgContent = message.getContent();
109 if (msgContent.getLength() > 4) {
110 byte[] content = new byte[msgContent.getLength() - 4];
111 System.arraycopy(msgContent.data, 4, content, 0, content.length);
112 command.setContent(content);
113 }
114 } else {
115 ActiveMQTextMessage msg = (ActiveMQTextMessage)message.copy();
116 String messageText = msg.getText();
117 if (messageText != null) {
118 command.setContent(msg.getText().getBytes("UTF-8"));
119 }
120 }
121
122 } else if (message.getDataStructureType() == ActiveMQBytesMessage.DATA_STRUCTURE_TYPE) {
123
124 ActiveMQBytesMessage msg = (ActiveMQBytesMessage)message.copy();
125 msg.setReadOnlyBody(true);
126 byte[] data = new byte[(int)msg.getBodyLength()];
127 msg.readBytes(data);
128
129 headers.put(Stomp.Headers.CONTENT_LENGTH, Integer.toString(data.length));
130 command.setContent(data);
131 } else if (message.getDataStructureType() == ActiveMQMessage.DATA_STRUCTURE_TYPE &&
132 AdvisorySupport.ADIVSORY_MESSAGE_TYPE.equals(message.getType())) {
133
134 FrameTranslator.Helper.copyStandardHeadersFromMessageToFrame(
135 converter, message, command, this);
136
137 String body = marshallAdvisory(message.getDataStructure());
138 command.setContent(body.getBytes("UTF-8"));
139 }
140 return command;
141 }
142
143 public String convertDestination(ProtocolConverter converter, Destination d) {
144 if (d == null) {
145 return null;
146 }
147 ActiveMQDestination activeMQDestination = (ActiveMQDestination)d;
148 String physicalName = activeMQDestination.getPhysicalName();
149
150 String rc = converter.getCreatedTempDestinationName(activeMQDestination);
151 if( rc!=null ) {
152 return rc;
153 }
154
155 StringBuilder buffer = new StringBuilder();
156 if (activeMQDestination.isQueue()) {
157 if (activeMQDestination.isTemporary()) {
158 buffer.append("/remote-temp-queue/");
159 } else {
160 buffer.append("/queue/");
161 }
162 } else {
163 if (activeMQDestination.isTemporary()) {
164 buffer.append("/remote-temp-topic/");
165 } else {
166 buffer.append("/topic/");
167 }
168 }
169 buffer.append(physicalName);
170 return buffer.toString();
171 }
172
173 public ActiveMQDestination convertDestination(ProtocolConverter converter, String name, boolean forceFallback) throws ProtocolException {
174 if (name == null) {
175 return null;
176 } else if (name.startsWith("/queue/")) {
177 String qName = name.substring("/queue/".length(), name.length());
178 return ActiveMQDestination.createDestination(qName, ActiveMQDestination.QUEUE_TYPE);
179 } else if (name.startsWith("/topic/")) {
180 String tName = name.substring("/topic/".length(), name.length());
181 return ActiveMQDestination.createDestination(tName, ActiveMQDestination.TOPIC_TYPE);
182 } else if (name.startsWith("/remote-temp-queue/")) {
183 String tName = name.substring("/remote-temp-queue/".length(), name.length());
184 return ActiveMQDestination.createDestination(tName, ActiveMQDestination.TEMP_QUEUE_TYPE);
185 } else if (name.startsWith("/remote-temp-topic/")) {
186 String tName = name.substring("/remote-temp-topic/".length(), name.length());
187 return ActiveMQDestination.createDestination(tName, ActiveMQDestination.TEMP_TOPIC_TYPE);
188 } else if (name.startsWith("/temp-queue/")) {
189 return converter.createTempDestination(name, false);
190 } else if (name.startsWith("/temp-topic/")) {
191 return converter.createTempDestination(name, true);
192 } else {
193 if (forceFallback) {
194 try {
195 ActiveMQDestination fallback = ActiveMQDestination.getUnresolvableDestinationTransformer().transform(name);
196 if (fallback != null) {
197 return fallback;
198 }
199 } catch (JMSException e) {
200 throw new ProtocolException("Illegal destination name: [" + name + "] -- ActiveMQ STOMP destinations "
201 + "must begin with one of: /queue/ /topic/ /temp-queue/ /temp-topic/", false, e);
202 }
203 }
204 throw new ProtocolException("Illegal destination name: [" + name + "] -- ActiveMQ STOMP destinations "
205 + "must begin with one of: /queue/ /topic/ /temp-queue/ /temp-topic/");
206 }
207 }
208
209 /**
210 * Return an Advisory message as a JSON formatted string
211 * @param ds
212 * @return
213 */
214 protected String marshallAdvisory(final DataStructure ds) {
215 XStream xstream = new XStream(new JsonHierarchicalStreamDriver());
216 xstream.setMode(XStream.NO_REFERENCES);
217 xstream.aliasPackage("", "org.apache.activemq.command");
218 return xstream.toXML(ds);
219 }
220 }