Source Code Cross Referenced for DeployContainer.java in  » EJB-Server-resin-3.1.5 » resin » com » caucho » server » deploy » 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.server.deploy 
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.server.deploy;
031:
032:        import com.caucho.lifecycle.Lifecycle;
033:        import com.caucho.loader.Environment;
034:        import com.caucho.make.CachedDependency;
035:        import com.caucho.util.L10N;
036:        import com.caucho.vfs.Dependency;
037:
038:        import javax.annotation.PostConstruct;
039:        import java.util.*;
040:        import java.util.logging.Logger;
041:
042:        /**
043:         * A container of deploy objects.
044:         */
045:        public class DeployContainer<C extends DeployController> extends
046:                CachedDependency implements  Dependency {
047:            private static final L10N L = new L10N(DeployContainer.class);
048:            private static final Logger log = Logger
049:                    .getLogger(DeployContainer.class.getName());
050:
051:            private final DeployListGenerator<C> _deployListGenerator = new DeployListGenerator<C>(
052:                    this );
053:
054:            private final ArrayList<C> _controllerList = new ArrayList<C>();
055:
056:            private final Lifecycle _lifecycle = new Lifecycle();
057:
058:            /**
059:             * Creates the deploy container.
060:             */
061:            public DeployContainer() {
062:                setCheckInterval(Environment.getDependencyCheckInterval());
063:            }
064:
065:            /**
066:             * Adds a deploy generator.
067:             */
068:            public void add(DeployGenerator<C> generator) {
069:                Set<String> names = new TreeSet<String>();
070:                generator.fillDeployedKeys(names);
071:
072:                _deployListGenerator.add(generator);
073:
074:                if (_lifecycle.isActive())
075:                    update(names);
076:            }
077:
078:            /**
079:             * Removes a deploy.
080:             */
081:            public void remove(DeployGenerator<C> generator) {
082:                Set<String> names = new TreeSet<String>();
083:                generator.fillDeployedKeys(names);
084:
085:                _deployListGenerator.remove(generator);
086:
087:                if (_lifecycle.isActive())
088:                    update(names);
089:            }
090:
091:            /**
092:             * Returns true if the deployment has modified.
093:             */
094:            public boolean isModifiedImpl() {
095:                return _deployListGenerator.isModified();
096:            }
097:
098:            /**
099:             * Logs the reason for modification.
100:             */
101:            public boolean logModified(Logger log) {
102:                return _deployListGenerator.logModified(log);
103:            }
104:
105:            /**
106:             * Forces updates.
107:             */
108:            public void update() {
109:                _deployListGenerator.update();
110:            }
111:
112:            /**
113:             * Initialize the container.
114:             */
115:            @PostConstruct
116:            public void init() {
117:                if (!_lifecycle.toInit())
118:                    return;
119:            }
120:
121:            /**
122:             * Start the container.
123:             */
124:            public void start() {
125:                init();
126:
127:                if (!_lifecycle.toActive())
128:                    return;
129:
130:                _deployListGenerator.start();
131:
132:                HashSet<String> keys = new LinkedHashSet<String>();
133:
134:                _deployListGenerator.fillDeployedKeys(keys);
135:                for (String key : keys) {
136:                    startImpl(key);
137:                }
138:
139:                ArrayList<C> controllerList;
140:
141:                synchronized (_controllerList) {
142:                    controllerList = new ArrayList<C>(_controllerList);
143:
144:                    Collections.sort(controllerList,
145:                            new StartupPriorityComparator());
146:                }
147:
148:                for (int i = 0; i < controllerList.size(); i++) {
149:                    C controller = controllerList.get(i);
150:
151:                    controller.startOnInit();
152:                }
153:            }
154:
155:            /**
156:             * Returns the matching entry.
157:             */
158:            public C findController(String name) {
159:                C controller = findDeployedController(name);
160:
161:                if (controller != null)
162:                    return controller;
163:
164:                controller = generateController(name);
165:
166:                if (controller == null)
167:                    return null;
168:                // server/10tm
169:                else if (controller.isNameMatch(name)) {
170:                    return controller;
171:                } else {
172:                    return null;
173:                }
174:            }
175:
176:            /**
177:             * Returns the deployed entries.
178:             */
179:            public ArrayList<C> getControllers() {
180:                ArrayList<C> list = new ArrayList<C>();
181:
182:                synchronized (_controllerList) {
183:                    list.addAll(_controllerList);
184:                }
185:
186:                return list;
187:            }
188:
189:            /**
190:             * Updates all the names.
191:             */
192:            private void update(Set<String> names) {
193:                Iterator<String> iter = names.iterator();
194:                while (iter.hasNext()) {
195:                    String name = iter.next();
196:
197:                    update(name);
198:                }
199:            }
200:
201:            /**
202:             * Callback from the DeployGenerator when the deployment changes.
203:             * <code>update</code> is only called when a deployment is added
204:             * or removed, e.g. with a new .war file.
205:             *
206:             * The entry handles its own internal changes, e.g. a modification to
207:             * a web.xml file.
208:             */
209:            public C update(String name) {
210:                C newController = updateImpl(name);
211:
212:                if (_lifecycle.isActive() && newController != null)
213:                    newController.startOnInit();
214:
215:                return newController;
216:            }
217:
218:            /**
219:             * Callback from the DeployGenerator when the deployment changes.
220:             * <code>update</code> is only called when a deployment is added
221:             * or removed, e.g. with a new .war file.
222:             *
223:             * The entry handles its own internal changes, e.g. a modification to
224:             * a web.xml file.
225:             */
226:            C updateImpl(String name) {
227:                C oldController = null;
228:
229:                synchronized (_controllerList) {
230:                    oldController = findDeployedController(name);
231:
232:                    if (oldController != null)
233:                        _controllerList.remove(oldController);
234:                }
235:
236:                if (oldController != null)
237:                    oldController.destroy();
238:
239:                // destroy must be before generate because of JMX unregistration
240:
241:                C newController = generateController(name);
242:
243:                return newController;
244:            }
245:
246:            /**
247:             * Starts a particular controller.
248:             *
249:             * @param name the domain-specified name matching the controller, e.g. the
250:             *  hostname or the context-path.
251:             */
252:            private C startImpl(String name) {
253:                C oldController = null;
254:
255:                synchronized (_controllerList) {
256:                    oldController = findDeployedController(name);
257:                }
258:
259:                if (oldController != null)
260:                    return oldController;
261:
262:                return generateController(name);
263:            }
264:
265:            /**
266:             * Called to explicitly remove an entry from the cache.
267:             */
268:            public void remove(String name) {
269:                C oldController = null;
270:
271:                synchronized (_controllerList) {
272:                    oldController = findDeployedController(name);
273:
274:                    if (oldController != null)
275:                        _controllerList.remove(oldController);
276:                }
277:
278:                if (oldController != null)
279:                    oldController.destroy();
280:            }
281:
282:            /**
283:             * Generates the controller.
284:             */
285:            private C generateController(String name) {
286:                if (!_lifecycle.isActive())
287:                    return null;
288:
289:                C newController = _deployListGenerator.generateController(name);
290:
291:                // server/1h00,13g4
292:                // generated controller might match the name, e.g.
293:                // when webapps deploy has an overriding explicit <web-app>
294:                if (newController == null)
295:                    return null;
296:
297:                // the new entry might already be generated by another thread
298:                synchronized (_controllerList) {
299:                    C controller = findDeployedController(newController.getId());
300:
301:                    if (controller != null)
302:                        return controller;
303:
304:                    _controllerList.add(newController);
305:                }
306:
307:                init(newController);
308:
309:                return newController;
310:            }
311:
312:            private void init(C controller) {
313:                Thread thread = Thread.currentThread();
314:                ClassLoader oldLoader = thread.getContextClassLoader();
315:
316:                try {
317:                    thread.setContextClassLoader(controller
318:                            .getParentClassLoader());
319:
320:                    controller.init();
321:                } finally {
322:                    thread.setContextClassLoader(oldLoader);
323:                }
324:            }
325:
326:            /**
327:             * Returns an already deployed entry.
328:             */
329:            private C findDeployedController(String name) {
330:                synchronized (_controllerList) {
331:                    for (int i = 0; i < _controllerList.size(); i++) {
332:                        C controller = _controllerList.get(i);
333:
334:                        if (controller.isNameMatch(name)) {
335:                            return controller;
336:                        }
337:                    }
338:                }
339:
340:                return null;
341:            }
342:
343:            /**
344:             * Closes the stop.
345:             */
346:            public void stop() {
347:                if (!_lifecycle.toStop())
348:                    return;
349:
350:                ArrayList<C> controllers;
351:
352:                synchronized (_controllerList) {
353:                    controllers = new ArrayList<C>(_controllerList);
354:
355:                    Collections.sort(controllers,
356:                            new StartupPriorityComparator());
357:                }
358:
359:                for (int i = controllers.size() - 1; i >= 0; i--)
360:                    controllers.get(i).stop();
361:            }
362:
363:            /**
364:             * Closes the deploys.
365:             */
366:            public void destroy() {
367:                stop();
368:
369:                if (!_lifecycle.toDestroy())
370:                    return;
371:
372:                _deployListGenerator.destroy();
373:
374:                ArrayList<C> controllerList;
375:
376:                synchronized (_controllerList) {
377:                    controllerList = new ArrayList<C>(_controllerList);
378:                    _controllerList.clear();
379:
380:                    Collections.sort(controllerList,
381:                            new StartupPriorityComparator());
382:                }
383:
384:                for (int i = controllerList.size() - 1; i >= 0; i--) {
385:                    C controller = controllerList.get(i);
386:
387:                    controller.destroy();
388:                }
389:            }
390:
391:            public String toString() {
392:                return "DeployContainer$" + System.identityHashCode(this )
393:                        + "[]";
394:            }
395:
396:            public class StartupPriorityComparator implements  Comparator<C> {
397:                public int compare(C a, C b) {
398:                    if (a.getStartupPriority() == b.getStartupPriority())
399:                        return 0;
400:                    else if (a.getStartupPriority() < b.getStartupPriority())
401:                        return -1;
402:                    else
403:                        return 1;
404:                }
405:            }
406:        }
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