Source Code Cross Referenced for ConsumerRegistryService.java in  » Portal » jboss-portal-2.6.4 » org » jboss » portal » wsrp » consumer » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Portal » jboss portal 2.6.4 » org.jboss.portal.wsrp.consumer 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /******************************************************************************
002:         * JBoss, a division of Red Hat                                               *
003:         * Copyright 2006, Red Hat Middleware, LLC, and individual                    *
004:         * contributors as indicated by the @authors tag. See the                     *
005:         * copyright.txt in the distribution for a full listing of                    *
006:         * individual contributors.                                                   *
007:         *                                                                            *
008:         * This is free software; you can redistribute it and/or modify it            *
009:         * under the terms of the GNU Lesser General Public License as                *
010:         * published by the Free Software Foundation; either version 2.1 of           *
011:         * the License, or (at your option) any later version.                        *
012:         *                                                                            *
013:         * This software is distributed in the hope that it will be useful,           *
014:         * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
015:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU           *
016:         * Lesser General Public License for more details.                            *
017:         *                                                                            *
018:         * You should have received a copy of the GNU Lesser General Public           *
019:         * License along with this software; if not, write to the Free                *
020:         * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA         *
021:         * 02110-1301 USA, or see the FSF site: http://www.fsf.org.                   *
022:         ******************************************************************************/package org.jboss.portal.wsrp.consumer;
023:
024:        import org.hibernate.HibernateException;
025:        import org.hibernate.Session;
026:        import org.hibernate.SessionFactory;
027:        import org.jboss.portal.common.util.ParameterValidation;
028:        import org.jboss.portal.core.event.PortalEventListenerRegistry;
029:        import org.jboss.portal.jems.as.system.AbstractJBossService;
030:        import org.jboss.portal.portlet.PortletInvoker;
031:        import org.jboss.portal.portlet.PortletInvokerException;
032:        import org.jboss.portal.portlet.federation.FederatedPortletInvoker;
033:        import org.jboss.portal.portlet.federation.FederatingPortletInvoker;
034:        import org.jboss.portal.wsrp.WSRPConsumer;
035:
036:        import javax.naming.InitialContext;
037:        import java.util.Collection;
038:        import java.util.Collections;
039:        import java.util.Iterator;
040:        import java.util.SortedMap;
041:        import java.util.TreeMap;
042:
043:        /**
044:         * @author <a href="mailto:chris.laprun@jboss.com">Chris Laprun</a>
045:         * @version $Revision: 9864 $
046:         * @since 2.6
047:         */
048:        public class ConsumerRegistryService extends AbstractJBossService
049:                implements  ConsumerRegistry {
050:            /** Gives access to the Portal's portlet invokers */
051:            private FederatingPortletInvoker federatingPortletInvoker;
052:
053:            private SortedMap<String, WSRPConsumer> consumers;
054:
055:            private SessionFactory sessionFactory;
056:
057:            private String sessionFactoryJNDIName;
058:
059:            private PortalEventListenerRegistry portalEventListenerRegistry;
060:
061:            private static final String CONSUMER_WITH_ID = "Consumer with id '";
062:            private static final String RELEASE_SESSIONS_LISTENER = "release_sessions_listener_";
063:
064:            public FederatingPortletInvoker getFederatingPortletInvoker() {
065:                return federatingPortletInvoker;
066:            }
067:
068:            public void setPortalEventListenerRegistry(
069:                    PortalEventListenerRegistry portalEventListenerRegistry) {
070:                this .portalEventListenerRegistry = portalEventListenerRegistry;
071:            }
072:
073:            public WSRPConsumer createConsumer(String id,
074:                    Integer expirationCacheSeconds) {
075:                ParameterValidation.throwIllegalArgExceptionIfNullOrEmpty(id,
076:                        "Consumer identifier", "Creating a Consumer");
077:
078:                if (getConsumer(id) != null) {
079:                    throw new ConsumerException(CONSUMER_WITH_ID + id
080:                            + "' already exists!");
081:                }
082:
083:                ProducerInfo info = new ProducerInfo();
084:                info.setId(id);
085:                info.setRegistry(this );
086:                info.setExpirationCacheSeconds(expirationCacheSeconds);
087:
088:                try {
089:                    Session session = sessionFactory.getCurrentSession();
090:
091:                    session.persist(info);
092:                } catch (HibernateException e) {
093:                    throw new ConsumerException("Couldn't create Consumer '"
094:                            + id + "'", e);
095:                }
096:
097:                log.info(CONSUMER_WITH_ID + id + "' created");
098:                return createConsumerFrom(info);
099:            }
100:
101:            public void destroyConsumer(String id) {
102:                ParameterValidation.throwIllegalArgExceptionIfNullOrEmpty(id,
103:                        "Consumer identifier", "Destroying a Consumer");
104:
105:                WSRPConsumer consumer = getConsumer(id);
106:                if (consumer != null) {
107:                    ProducerInfo info = consumer.getProducerInfo();
108:
109:                    try {
110:                        consumer.releaseSessions();
111:                    } catch (PortletInvokerException e) {
112:                        log
113:                                .debug("releaseSessions failed when attempting to destroy "
114:                                        + CONSUMER_WITH_ID + id + "'");
115:                    }
116:
117:                    // if the consumer is registered, deregister it
118:                    if (info.isRegistered()) {
119:                        registerOrDeregisterConsumerWith(id, false);
120:                    }
121:
122:                    deactivateConsumerWith(id);
123:                    consumers.remove(id);
124:
125:                    Session session = sessionFactory.getCurrentSession();
126:
127:                    session.delete(info);
128:                } else {
129:                    throw new ConsumerException(CONSUMER_WITH_ID + id
130:                            + "' doesn't exist!");
131:                }
132:
133:                log.info(CONSUMER_WITH_ID + id + "' destroyed");
134:            }
135:
136:            public void persistConsumer(WSRPConsumer consumer) {
137:                ParameterValidation.throwIllegalArgExceptionIfNull(consumer,
138:                        "Consumer");
139:
140:                ProducerInfo info = consumer.getProducerInfo();
141:
142:                try {
143:                    Session session = sessionFactory.getCurrentSession();
144:                    session.persist(info);
145:                } catch (HibernateException e) {
146:                    throw new ConsumerException(CONSUMER_WITH_ID + info.getId()
147:                            + "' couldn't be persisted!");
148:                }
149:
150:                createConsumerFrom(info);
151:            }
152:
153:            public void setFederatingPortletInvoker(
154:                    FederatingPortletInvoker federatingPortletInvoker) {
155:                this .federatingPortletInvoker = federatingPortletInvoker;
156:            }
157:
158:            public String getSessionFactoryJNDIName() {
159:                return sessionFactoryJNDIName;
160:            }
161:
162:            public void setSessionFactoryJNDIName(String sessionFactoryJNDIName) {
163:                this .sessionFactoryJNDIName = sessionFactoryJNDIName;
164:            }
165:
166:            private WSRPConsumer createConsumerFrom(ProducerInfo producerInfo) {
167:                WSRPConsumer consumer = new WSRPConsumerImpl(producerInfo);
168:                consumers.put(producerInfo.getId(), consumer);
169:
170:                return consumer;
171:            }
172:
173:            public void activateConsumerWith(String id)
174:                    throws ConsumerException {
175:                ParameterValidation.throwIllegalArgExceptionIfNullOrEmpty(id,
176:                        "Consumer identifier", "Activating a Consumer");
177:
178:                // if the consumer associated with the given id is already registered, don't do anything
179:                if (federatingPortletInvoker.getFederatedInvoker(id) == null) {
180:                    startOrStopConsumer(id, true);
181:                } else {
182:                    // todo: fix-me federated portlet invoker gets desynchronized...
183:                    WSRPConsumer consumer = getConsumer(id);
184:                    if (consumer != null && !consumer.isActive()) {
185:                        federatingPortletInvoker.unregisterInvoker(id);
186:                        startOrStopConsumer(id, true);
187:                    }
188:                }
189:            }
190:
191:            public void deactivateConsumerWith(String id)
192:                    throws ConsumerException {
193:                ParameterValidation.throwIllegalArgExceptionIfNullOrEmpty(id,
194:                        "Consumer identifier", "Deactivating a Consumer");
195:
196:                // only process if there is a registered Consumer with the specified id
197:                if (federatingPortletInvoker.getFederatedInvoker(id) != null) {
198:                    startOrStopConsumer(id, false);
199:                } else {
200:                    // todo: fix-me federated portlet invoker gets desynchronized...
201:                    WSRPConsumer consumer = getConsumer(id);
202:                    if (consumer != null && consumer.isActive()) {
203:                        federatingPortletInvoker.registerInvoker(id, consumer);
204:                        startOrStopConsumer(id, false);
205:                    }
206:                }
207:            }
208:
209:            public void updateProducerInfo(ProducerInfo producerInfo) {
210:                ParameterValidation.throwIllegalArgExceptionIfNull(
211:                        producerInfo, "ProducerInfo");
212:
213:                Session session = sessionFactory.getCurrentSession();
214:                try {
215:
216:                    // Retrieve the previous id of the given ProducerInfo to update local consumers map if needed
217:                    String oldId = (String) session
218:                            .createQuery(
219:                                    "select pi.persistentId from ProducerInfo pi where pi.id = :key")
220:                            .setParameter("key", producerInfo.getKey())
221:                            .uniqueResult();
222:                    if (producerInfo.getId().equals(oldId)) {
223:                        oldId = null; // reset oldId as the ProducerInfo's id hasn't been modified
224:                    }
225:
226:                    // merge old producer info with new data
227:                    session.update(producerInfo);
228:
229:                    // if we updated and oldId is not null, we need to update the local consumers map
230:                    if (oldId != null) {
231:                        WSRPConsumer consumer = consumers.remove(oldId);
232:                        consumers.put(producerInfo.getId(), consumer);
233:                    }
234:                } catch (HibernateException e) {
235:                    throw new ConsumerException(
236:                            "Couldn't update ProducerInfo for Consumer '"
237:                                    + producerInfo.getId() + "'", e);
238:                }
239:            }
240:
241:            protected void startService() throws Exception {
242:                InitialContext initialContext = new InitialContext();
243:                sessionFactory = (SessionFactory) initialContext
244:                        .lookup(sessionFactoryJNDIName);
245:
246:                // load the configured consumers
247:                consumers = new TreeMap<String, WSRPConsumer>();
248:
249:                Session session = sessionFactory.getCurrentSession();
250:
251:                Iterator producerInfos = session.createQuery(
252:                        "from ProducerInfo pi order by pi.persistentId")
253:                        .iterate();
254:
255:                // load the configured producers
256:                ProducerInfo producerInfo;
257:                while (producerInfos.hasNext()) {
258:                    producerInfo = (ProducerInfo) producerInfos.next();
259:
260:                    // need to set the registry after loading from DB since registry is not persisted.
261:                    producerInfo.setRegistry(this );
262:
263:                    createConsumerFrom(producerInfo);
264:
265:                    try {
266:                        // if the producer is marked as active, activate it fo' real! :)
267:                        if (producerInfo.isActive()) {
268:                            activateConsumerWith(producerInfo.getId());
269:                        }
270:                    } catch (Exception e) {
271:                        producerInfo.setActive(false);
272:                        updateProducerInfo(producerInfo);
273:                    }
274:
275:                }
276:            }
277:
278:            protected void stopService() throws Exception {
279:                sessionFactory = null;
280:
281:                for (WSRPConsumer consumer : consumers.values()) {
282:                    // if producer is not active, it shouldn't be registered with the federating portlet invoker, hence do not
283:                    // unregister it.
284:                    if (consumer.getProducerInfo().isActive()) {
285:                        federatingPortletInvoker.unregisterInvoker(consumer
286:                                .getProducerId());
287:                    }
288:
289:                    try {
290:                        consumer.stop();
291:                    } catch (Exception e) {
292:                        // ignore and continue
293:                    }
294:                }
295:
296:                consumers.clear();
297:                consumers = null;
298:            }
299:
300:            public Collection getConfiguredConsumers() {
301:                return Collections.unmodifiableCollection(consumers.values());
302:            }
303:
304:            public WSRPConsumer getConsumer(String id) {
305:                ParameterValidation.throwIllegalArgExceptionIfNullOrEmpty(id,
306:                        "consumer id", null);
307:                return consumers.get(id);
308:            }
309:
310:            public void registerOrDeregisterConsumerWith(String id,
311:                    boolean register) {
312:                ParameterValidation.throwIllegalArgExceptionIfNullOrEmpty(id,
313:                        "Consumer identifier",
314:                        "Registering or deregistering a Consumer");
315:
316:                WSRPConsumer consumer = getConsumer(id);
317:
318:                if (consumer == null) {
319:                    throw new ConsumerException(CONSUMER_WITH_ID + id
320:                            + "' doesn't exist!");
321:                }
322:
323:                try {
324:                    if (register) {
325:                        consumer.getProducerInfo().register();
326:                    } else {
327:                        consumer.getProducerInfo().deregister();
328:                    }
329:                } catch (Exception e) {
330:                    // unexpected exception: deactivate the consumer
331:                    deactivateConsumerWith(id);
332:                    Throwable cause = e.getCause();
333:                    throw new ConsumerException("Couldn't "
334:                            + (register ? "register" : "deregister")
335:                            + CONSUMER_WITH_ID + id + "'",
336:                            cause != null ? cause : e);
337:                }
338:            }
339:
340:            private void startOrStopConsumer(String id, boolean start) {
341:                WSRPConsumer consumer;
342:
343:                try {
344:                    if (start) {
345:                        consumer = getConsumer(id);
346:
347:                        if (consumer == null) {
348:                            throw new IllegalArgumentException(CONSUMER_WITH_ID
349:                                    + id + "' doesn't exist!");
350:                        }
351:
352:                        consumer.activate();
353:                        federatingPortletInvoker.registerInvoker(id, consumer);
354:                        portalEventListenerRegistry.registerListener(
355:                                getListenerIdFrom(id), consumer);
356:                    } else {
357:                        FederatedPortletInvoker fedInvoker = federatingPortletInvoker
358:                                .getFederatedInvoker(id);
359:                        if (fedInvoker != null) {
360:                            PortletInvoker invoker = fedInvoker
361:                                    .getPortletInvoker();
362:                            if (invoker instanceof  WSRPConsumer) {
363:                                consumer = (WSRPConsumer) invoker;
364:                                consumer.deactivate();
365:                                federatingPortletInvoker.unregisterInvoker(id);
366:                                portalEventListenerRegistry
367:                                        .unregisterListener(getListenerIdFrom(id));
368:                            } else {
369:                                throw new IllegalArgumentException(
370:                                        "PortletInvoker with id '" + id
371:                                                + "' is not a WSRPConsumer!");
372:                            }
373:                        } else {
374:                            throw new IllegalArgumentException(
375:                                    "There is no registered PortletInvoker with id '"
376:                                            + id + "'");
377:                        }
378:                    }
379:                } catch (Exception e) {
380:                    throw new ConsumerException("Couldn't "
381:                            + (start ? "start" : "stop")
382:                            + " Consumer service '" + id + "'", e);
383:                }
384:
385:                // update ProducerInfo
386:                updateProducerInfo(consumer.getProducerInfo());
387:            }
388:
389:            private String getListenerIdFrom(String id) {
390:                return RELEASE_SESSIONS_LISTENER + id;
391:            }
392:        }
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