Source Code Cross Referenced for NamingManager.java in  » J2EE » JOnAS-4.8.6 » org » objectweb » jonas » naming » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » JOnAS 4.8.6 » org.objectweb.jonas.naming 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         *
003:         * JOnAS: Java(TM) Open Application Server
004:         * Copyright (C) 1999-2005 Bull S.A.
005:         * Contact: jonas-team@objectweb.org
006:         *
007:         * This library is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU Lesser General Public
009:         * License as published by the Free Software Foundation; either
010:         * version 2.1 of the License, or any later version.
011:         *
012:         * This library is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
015:         * Lesser General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU Lesser General Public
018:         * License along with this library; if not, write to the Free Software
019:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
020:         * USA
021:         *
022:         * --------------------------------------------------------------------------
023:         * $Id: NamingManager.java 6893 2005-06-06 11:20:35Z benoitf $
024:         * --------------------------------------------------------------------------
025:         */package org.objectweb.jonas.naming;
026:
027:        import java.util.Hashtable;
028:
029:        import javax.ejb.spi.HandleDelegate;
030:        import javax.naming.Context;
031:        import javax.naming.InitialContext;
032:        import javax.naming.NamingException;
033:
034:        import org.omg.CORBA.ORB;
035:
036:        import org.objectweb.carol.jndi.ns.JacORBCosNaming;
037:
038:        import org.objectweb.jonas_ejb.container.JHandleDelegate;
039:
040:        import org.objectweb.jonas_lib.naming.ContainerNaming;
041:
042:        import org.objectweb.jonas.common.Log;
043:
044:        import org.objectweb.util.monolog.api.BasicLevel;
045:        import org.objectweb.util.monolog.api.Logger;
046:
047:        /**
048:         * Naming Manager for an EJB Server. this singleton class must exist in each
049:         * jonas server.
050:         * @author Philippe Durieux
051:         * @author Philippe Coq : Monolog
052:         * @author Florent Benoit & Ludovic Bert : Context for web container
053:         */
054:        public class NamingManager implements  ContainerNaming {
055:
056:            /**
057:             * Logger used for traces
058:             */
059:            private static Logger logger = Log
060:                    .getLogger(Log.JONAS_NAMING_PREFIX);
061:
062:            /**
063:             * Naming Context associated with the thread
064:             */
065:            private ThreadLocal threadContext = new ThreadLocal();
066:
067:            /**
068:             * Initial Context
069:             */
070:            private InitialContext ictx = null;
071:
072:            /**
073:             * Context of the server
074:             */
075:            private static Context serverContext = null;
076:
077:            /**
078:             * Environment
079:             */
080:            private Hashtable myEnv = null;
081:
082:            /**
083:             * Associate a context to a class loader
084:             */
085:            private Hashtable clBindings = null;
086:
087:            /**
088:             * Static context used by client container. One context for all the JVM.
089:             */
090:            private static Context clientCtx = null;
091:
092:            /**
093:             * Singleton management: - the constructor is private. - use static method
094:             * getInstance to retrieve/create the instance.
095:             */
096:            private static NamingManager unique = null;
097:
098:            /**
099:             * UserTransaction object, to be shared by all components.
100:             */
101:            private Object userTransaction = null;
102:
103:            /**
104:             * HandleDelegate implementation is shared by all component contexts
105:             */
106:            private HandleDelegate handleDelegate = null;
107:
108:            /**
109:             * Create the naming manager.
110:             * @throws NamingException if no initial context is built
111:             */
112:            private NamingManager() throws NamingException {
113:                try {
114:                    ictx = new InitialContext();
115:                    // there is a bug in carol that makes this not work.
116:                    //myEnv = ictx.getEnvironment();
117:                    clBindings = new Hashtable();
118:
119:                } catch (NamingException n) {
120:                    logger.log(BasicLevel.ERROR, "NamingManager: "
121:                            + n.getExplanation());
122:                    Throwable t = n.getRootCause();
123:                    if (t != null) {
124:                        if (t.getMessage().startsWith(
125:                                "Connection refused to host:")) {
126:                            logger
127:                                    .log(BasicLevel.ERROR,
128:                                            "NamingManager: rmi registry not started ?");
129:                        } else if (t.getMessage().startsWith(
130:                                "error during remote invocation")) {
131:                            logger
132:                                    .log(BasicLevel.ERROR,
133:                                            "NamingManager: jrmi registry not started ?");
134:                        } else {
135:                            logger.log(BasicLevel.ERROR, "NamingManager: "
136:                                    + t.getMessage());
137:                        }
138:                    }
139:                    throw n;
140:                }
141:
142:            }
143:
144:            /**
145:             * Return the unique instance of a NamingManager.
146:             * @return NamingManager the unique instance.
147:             * @throws NamingException if it failed.
148:             */
149:            public static NamingManager getInstance() throws NamingException {
150:                if (unique == null) {
151:                    unique = new NamingManager();
152:                }
153:                return unique;
154:            }
155:
156:            // ------------------------------------------------------------------
157:            // ContainerNaming implementation
158:            // ------------------------------------------------------------------
159:
160:            /**
161:             * Get the initialContext used in this jonas server.
162:             * @return InitialContext the initial context.
163:             */
164:            public InitialContext getInitialContext() {
165:                return ictx;
166:            }
167:
168:            /**
169:             * @return The HandleDelegate implementation for this server
170:             */
171:            public HandleDelegate getHandleDelegate() {
172:                if (handleDelegate == null) {
173:                    handleDelegate = new JHandleDelegate();
174:                }
175:                return handleDelegate;
176:            }
177:
178:            /**
179:             * Create Context for application and component environments. (formally
180:             * known as createComponentContext)
181:             * @param namespace namespace to used for the Context
182:             * @return a java: context with comp/ subcontext
183:             * @throws NamingException if the creation of the java: context failed.
184:             */
185:            public Context createEnvironmentContext(String namespace)
186:                    throws NamingException {
187:
188:                if (Log.isDebugNaming()) {
189:                    logger.log(BasicLevel.DEBUG, namespace);
190:                }
191:
192:                // Create a new environment
193:                CompNamingContext ctx = new CompNamingContext(namespace);
194:
195:                // Create subContext
196:                Context compCtx = ctx.createSubcontext("comp");
197:
198:                // Bind java:comp/UserTransaction
199:                if (userTransaction == null) {
200:                    try {
201:                        userTransaction = ictx
202:                                .lookup("javax.transaction.UserTransaction");
203:                    } catch (NamingException ne) {
204:                        if (Log.isDebugNaming()) {
205:                            logger.log(BasicLevel.DEBUG,
206:                                    "Cannot lookup UserTransaction.");
207:                        }
208:                    }
209:                }
210:                if (userTransaction != null) {
211:                    compCtx.rebind("UserTransaction", userTransaction);
212:                }
213:
214:                ORB orb = JacORBCosNaming.getOrb();
215:                if (orb != null) {
216:                    try {
217:                        // Bind the java:comp/ORB object instance
218:                        compCtx.rebind("ORB", orb);
219:                    } catch (NamingException e) {
220:                        String err = "Cannot create URL for java:comp/ORB object : "
221:                                + e;
222:                        logger.log(BasicLevel.ERROR, err);
223:                        throw new NamingException(err);
224:                    }
225:                }
226:
227:                // Bind java:comp/HandleDelegate
228:                compCtx.rebind("HandleDelegate", getHandleDelegate());
229:
230:                return ctx;
231:            }
232:
233:            /**
234:             * Get the Context associated with the current thread or to a class loader
235:             * @return Context the component context.
236:             * @throws NamingException When operation is not allowed
237:             */
238:            public Context getComponentContext() throws NamingException {
239:
240:                Context ctx = null;
241:
242:                // Check if there is a context to the local thread
243:                // For ejbs
244:                ctx = (Context) threadContext.get();
245:                if (ctx != null) {
246:                    if (Log.isDebugNaming()) {
247:                        logger.log(BasicLevel.DEBUG, "return Context for ejb");
248:                    }
249:                    return ctx;
250:                }
251:
252:                // Check if there is a context which match the currentThread
253:                // classLoader
254:                // For webapps
255:                ClassLoader cl = Thread.currentThread().getContextClassLoader();
256:                if ((cl != null) && (cl.getParent() != null)) {
257:                    ctx = (Context) clBindings.get(cl.getParent());
258:                    if (ctx != null) {
259:                        if (Log.isDebugNaming()) {
260:                            logger.log(BasicLevel.DEBUG,
261:                                    "return Context for webapp");
262:                        }
263:                        return ctx;
264:                    }
265:                }
266:
267:                // Check static context. use in client. One context per JVM.
268:                if (clientCtx != null) {
269:                    ctx = clientCtx;
270:                    if (ctx != null) {
271:                        if (Log.isDebugNaming()) {
272:                            logger.log(BasicLevel.DEBUG,
273:                                    "return Context for client");
274:                        }
275:                        return ctx;
276:                    }
277:                }
278:
279:                // No context found. This is outside of a j2ee component or server
280:                // component.
281:                if (ctx == null) {
282:                    ctx = getServerContext();
283:                    if (Log.isDebugNaming()) {
284:                        logger.log(BasicLevel.DEBUG,
285:                                "return default server Context");
286:                    }
287:                }
288:                return ctx;
289:            }
290:
291:            /**
292:             * Associate this CompNamingContext with the current thread. This method
293:             * should be called in preinvoke/postinvoke and when we build the bean
294:             * environment or web environment.
295:             * @param ctx the context to associate to the current thread.
296:             * @return Context the context of the thread
297:             */
298:            public Context setComponentContext(Context ctx) {
299:                Context ret = (Context) threadContext.get();
300:                threadContext.set(ctx);
301:                return ret;
302:            }
303:
304:            /**
305:             * Set back the context with the given value.
306:             * Don't return the previous context, use setComponentContext() method for this.
307:             * @param ctx the context to associate to the current thread.
308:             */
309:            public void resetComponentContext(Context ctx) {
310:                threadContext.set(ctx);
311:            }
312:
313:            /**
314:             * Associate the specified CompNamingContext with the given classloader.
315:             * @param ctx the context to associate to the classloader.
316:             * @param cl the classloader which is bind to the context.
317:             */
318:            public void setComponentContext(Context ctx, ClassLoader cl) {
319:                if (Log.isDebugNaming()) {
320:                    logger.log(BasicLevel.DEBUG, "class loader = " + cl);
321:                }
322:                clBindings.put(cl, ctx);
323:            }
324:
325:            /**
326:             * Set the context used by client container (per JVM instead of per thread)
327:             * @param ctx the context to set
328:             */
329:            public void setClientContainerComponentContext(Context ctx) {
330:                if (Log.isDebugNaming()) {
331:                    logger.log(BasicLevel.DEBUG, "");
332:                }
333:                clientCtx = ctx;
334:            }
335:
336:            /**
337:             * Return the CompNamingContext associated with the given classloader.
338:             * @param cl the classloader which is bind to the context.
339:             * @return the CompNamingContext associated with the given classloader.
340:             */
341:            public Context getComponentContext(ClassLoader cl) {
342:                if (Log.isDebugNaming()) {
343:                    logger.log(BasicLevel.DEBUG, "class loader = " + cl);
344:                }
345:                return (Context) clBindings.get(cl);
346:            }
347:
348:            /**
349:             * Remove the CompNamingContext associated with the given classloader.
350:             * @param cl the classloader which is bind to the context.
351:             */
352:            public void unSetComponentContext(ClassLoader cl) {
353:                if (Log.isDebugNaming()) {
354:                    logger.log(BasicLevel.DEBUG, "class loader = " + cl);
355:                }
356:                clBindings.remove(cl);
357:            }
358:
359:            /**
360:             * Return the environment for JNDI This is used only for handles today.
361:             * @return Hashtable the environment.
362:             */
363:            public Hashtable getEnv() {
364:                return myEnv;
365:            }
366:
367:            /**
368:             * Create Immutable Context. Not implemented !
369:             * @param namespace namespace to used for the Context
370:             * @return Context an immutable context
371:             * @throws NamingException if the creation of the java: context failed.
372:             */
373:            public Context createImmutableEnvironmentContext(String namespace)
374:                    throws NamingException {
375:                logger.log(BasicLevel.ERROR, "Not Implemented");
376:                return null;
377:            }
378:
379:            // ------------------------------------------------------------------
380:            // other proprietary methods
381:            // ------------------------------------------------------------------
382:
383:            /**
384:             * Get the server component context. This is used only internally in the
385:             * jonas NamingManager.
386:             * @return Context the server component context.
387:             */
388:            public Context getServerContext() {
389:                if (serverContext == null) {
390:                    try {
391:                        serverContext = createEnvironmentContext("server");
392:                    } catch (NamingException e) {
393:                        logger.log(BasicLevel.ERROR,
394:                                "cannot create serverContext:" + e);
395:                    }
396:                }
397:                return serverContext;
398:            }
399:
400:        }
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