Source Code Cross Referenced for AbstractDestination.java in  » EJB-Server-resin-3.1.5 » resin » com » caucho » jms » queue » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server resin 3.1.5 » resin » com.caucho.jms.queue 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003:         *
004:         * This file is part of Resin(R) Open Source
005:         *
006:         * Each copy or derived work must preserve the copyright notice and this
007:         * notice unmodified.
008:         *
009:         * Resin Open Source is free software; you can redistribute it and/or modify
010:         * it under the terms of the GNU General Public License as published by
011:         * the Free Software Foundation; either version 2 of the License, or
012:         * (at your option) any later version.
013:         *
014:         * Resin Open Source is distributed in the hope that it will be useful,
015:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
016:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017:         * of NON-INFRINGEMENT.  See the GNU General Public License for more
018:         * details.
019:         *
020:         * You should have received a copy of the GNU General Public License
021:         * along with Resin Open Source; if not, write to the
022:         *
023:         *   Free Software Foundation, Inc.
024:         *   59 Temple Place, Suite 330
025:         *   Boston, MA 02111-1307  USA
026:         *
027:         * @author Scott Ferguson
028:         */
029:
030:        package com.caucho.jms.queue;
031:
032:        import java.util.logging.*;
033:
034:        import javax.jms.*;
035:
036:        import java.io.Serializable;
037:        import java.util.Collection;
038:        import java.util.Iterator;
039:        import java.util.concurrent.BlockingQueue;
040:        import java.util.concurrent.TimeUnit;
041:
042:        import com.caucho.jms.JmsRuntimeException;
043:        import com.caucho.jms.message.*;
044:        import com.caucho.jms.connection.*;
045:
046:        import com.caucho.util.*;
047:        import com.caucho.webbeans.component.*;
048:
049:        /**
050:         * Implements an abstract queue.
051:         */
052:        abstract public class AbstractDestination extends
053:                java.util.AbstractQueue implements  javax.jms.Destination,
054:                BlockingQueue, java.io.Serializable, HandleAware {
055:            private static final L10N L = new L10N(AbstractDestination.class);
056:            private static final Logger log = Logger
057:                    .getLogger(AbstractDestination.class.getName());
058:
059:            private static long _idRandom;
060:            private static long _idCount;
061:
062:            private String _name = "default";
063:
064:            protected MessageFactory _messageFactory = new MessageFactory();
065:
066:            // queue api
067:            private ConnectionFactoryImpl _connectionFactory;
068:            private Connection _conn;
069:
070:            private Object _readLock = new Object();
071:            private Object _writeLock = new Object();
072:
073:            private JmsSession _writeSession;
074:            private JmsSession _readSession;
075:            private MessageConsumerImpl _consumer;
076:
077:            // serialization
078:            private Object _serializationHandle;
079:
080:            protected AbstractDestination() {
081:                synchronized (AbstractDestination.class) {
082:                    if (_idRandom == 0 || Alarm.isTest()) {
083:                        _idRandom = RandomUtil.getRandomLong();
084:                        _idCount = Alarm.getCurrentTime() << 16;
085:                    }
086:                }
087:            }
088:
089:            public void setName(String name) {
090:                _name = name;
091:            }
092:
093:            public String getName() {
094:                return _name;
095:            }
096:
097:            public String getQueueName() {
098:                return getName();
099:            }
100:
101:            public String getTopicName() {
102:                return getName();
103:            }
104:
105:            /**
106:             * Serialization callback to set the handle
107:             */
108:            public void setSerializationHandle(Object handle) {
109:                _serializationHandle = handle;
110:            }
111:
112:            //
113:            // JMX configuration data
114:            //
115:
116:            /**
117:             * Returns a descriptive URL for the queue.
118:             */
119:            public String getUrl() {
120:                return getClass().getSimpleName() + ":";
121:            }
122:
123:            //
124:            // runtime methods
125:            //
126:
127:            public void addConsumer(MessageConsumerImpl consumer) {
128:                throw new UnsupportedOperationException(getClass().getName());
129:            }
130:
131:            public void removeConsumer(MessageConsumerImpl consumer) {
132:                throw new UnsupportedOperationException(getClass().getName());
133:            }
134:
135:            abstract public void send(JmsSession session, MessageImpl msg,
136:                    long timeout) throws JMSException;
137:
138:            /**
139:             * Polls the next message from the store.  Returns null if no message
140:             * is available.
141:             *
142:             * @param isAutoAcknowledge if true, automatically acknowledge the message
143:             */
144:            public MessageImpl receive(boolean isAutoAcknowledge)
145:                    throws JMSException {
146:                return null;
147:            }
148:
149:            public boolean hasMessage() {
150:                return false;
151:            }
152:
153:            /**
154:             * Acknowledge receipt of the message.
155:             */
156:            public void acknowledge(String msgId) {
157:            }
158:
159:            /**
160:             * Rollback the message read.
161:             */
162:            public void rollback(String msgId) {
163:            }
164:
165:            public final String generateMessageID() {
166:                StringBuilder cb = new StringBuilder();
167:
168:                cb.append("ID:");
169:                generateMessageID(cb);
170:
171:                return cb.toString();
172:            }
173:
174:            protected void generateMessageID(StringBuilder cb) {
175:                long id;
176:
177:                synchronized (AbstractDestination.class) {
178:                    id = _idCount++;
179:                }
180:
181:                Base64.encode(cb, _idRandom);
182:                Base64.encode(cb, id);
183:            }
184:
185:            public Destination getJMSDestination() {
186:                return new DestinationHandle(toString());
187:            }
188:
189:            //
190:            // BlockingQueue api
191:            //
192:
193:            public int size() {
194:                return 0;
195:            }
196:
197:            public Iterator iterator() {
198:                throw new UnsupportedOperationException(getClass().getName());
199:            }
200:
201:            /**
202:             * Adds the item to the queue, waiting if necessary
203:             */
204:            public boolean offer(Object value, long timeout, TimeUnit unit) {
205:                try {
206:                    synchronized (_writeLock) {
207:                        JmsSession session = getWriteSession();
208:
209:                        Message msg = session
210:                                .createObjectMessage((Serializable) value);
211:
212:                        session.send(this , msg, 0, 0, Integer.MAX_VALUE);
213:
214:                        return true;
215:                    }
216:                } catch (RuntimeException e) {
217:                    throw e;
218:                } catch (Exception e) {
219:                    throw new JmsRuntimeException(e);
220:                }
221:            }
222:
223:            public Object poll(long timeout, TimeUnit unit) {
224:                try {
225:                    synchronized (_readLock) {
226:                        MessageConsumerImpl consumer = getReadConsumer();
227:
228:                        long msTimeout = unit.toMillis(timeout);
229:
230:                        Message msg = consumer.receive(msTimeout);
231:
232:                        if (msg instanceof  ObjectMessage) {
233:                            return ((ObjectMessage) msg).getObject();
234:                        } else if (msg instanceof  TextMessage) {
235:                            return ((TextMessage) msg).getText();
236:                        } else if (msg == null)
237:                            return null;
238:                        else
239:                            throw new JmsRuntimeException(
240:                                    L
241:                                            .l(
242:                                                    "'{0}' is an unsupported message for the BlockingQueue API.",
243:                                                    msg));
244:                    }
245:                } catch (RuntimeException e) {
246:                    throw e;
247:                } catch (Exception e) {
248:                    throw new JmsRuntimeException(e);
249:                }
250:            }
251:
252:            public boolean offer(Object value) {
253:                return offer(value, 0, TimeUnit.SECONDS);
254:            }
255:
256:            public void put(Object value) {
257:                offer(value, Integer.MAX_VALUE, TimeUnit.SECONDS);
258:            }
259:
260:            public int remainingCapacity() {
261:                return Integer.MAX_VALUE;
262:            }
263:
264:            public Object peek() {
265:                throw new UnsupportedOperationException(getClass().getName());
266:            }
267:
268:            public Object poll() {
269:                return poll(0, TimeUnit.MILLISECONDS);
270:            }
271:
272:            public Object take() {
273:                return poll(Integer.MAX_VALUE, TimeUnit.SECONDS);
274:            }
275:
276:            public int drainTo(Collection c) {
277:                throw new UnsupportedOperationException();
278:            }
279:
280:            public int drainTo(Collection c, int max) {
281:                throw new UnsupportedOperationException();
282:            }
283:
284:            protected JmsSession getWriteSession() throws JMSException {
285:                if (_conn == null) {
286:                    _connectionFactory = new ConnectionFactoryImpl();
287:                    _conn = _connectionFactory.createConnection();
288:                    _conn.start();
289:                }
290:
291:                if (_writeSession == null) {
292:                    _writeSession = (JmsSession) _conn.createSession(false,
293:                            Session.AUTO_ACKNOWLEDGE);
294:                }
295:
296:                return _writeSession;
297:            }
298:
299:            protected MessageConsumerImpl getReadConsumer() throws JMSException {
300:                if (_conn == null) {
301:                    _connectionFactory = new ConnectionFactoryImpl();
302:                    _conn = _connectionFactory.createConnection();
303:                    _conn.start();
304:                }
305:
306:                if (_readSession == null) {
307:                    _readSession = (JmsSession) _conn.createSession(false,
308:                            Session.AUTO_ACKNOWLEDGE);
309:                }
310:
311:                if (_consumer == null) {
312:                    _consumer = (MessageConsumerImpl) _readSession
313:                            .createConsumer(this );
314:                }
315:
316:                return _consumer;
317:            }
318:
319:            /**
320:             * Serialization handle
321:             */
322:            private Object writeReplace() {
323:                return _serializationHandle;
324:            }
325:
326:            public void close() {
327:            }
328:
329:            public String toString() {
330:                return getClass().getSimpleName() + "[" + getName() + "]";
331:            }
332:        }
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