Source Code Cross Referenced for JRepUtil.java in  » J2EE » JOnAS-4.8.6 » org » objectweb » jonas_ejb » container » 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_ejb.container 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * JOnAS: Java(TM) Open Application Server
003:         * Copyright (C) 2006 Bull S.A.S.
004:         * Contact: jonas-team@objectweb.org
005:         * Copyright (C) 2006 Distributed Systems Lab.
006:         * Universidad Polit??cnica de Madrid (Spain)
007:         * Contact: http://lsd.ls.fi.upm.es/lsd
008:         *
009:         * This library is free software; you can redistribute it and/or
010:         * modify it under the terms of the GNU Lesser General Public
011:         * License as published by the Free Software Foundation; either
012:         * version 2.1 of the License, or any later version.
013:         *
014:         * This library 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.  See the GNU
017:         * Lesser General Public License for more details.
018:         *
019:         * You should have received a copy of the GNU Lesser General Public
020:         * License along with this library; if not, write to the Free Software
021:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
022:         * USA
023:         *
024:         * --------------------------------------------------------------------------
025:         *
026:         * --------------------------------------------------------------------------
027:         */package org.objectweb.jonas_ejb.container;
028:
029:        import java.rmi.NoSuchObjectException;
030:        import java.rmi.Remote;
031:        import java.rmi.RemoteException;
032:
033:        import org.objectweb.carol.cmi.ClusterStub;
034:        import org.objectweb.carol.cmi.CmiOutputStream;
035:        import org.objectweb.carol.cmi.DistributedEquiv;
036:        import org.objectweb.carol.cmi.LowerOrb;
037:        import org.objectweb.carol.cmi.ObjectId;
038:        import org.objectweb.carol.cmi.ServerConfigException;
039:        import org.objectweb.carol.cmi.StubConfig;
040:        import org.objectweb.carol.cmi.StubConfigException;
041:        import org.objectweb.carol.cmi.StubData;
042:        import org.objectweb.carol.cmi.configuration.TraceCmi;
043:        import org.objectweb.carol.cmi.ha.EntityBeanReference;
044:        import org.objectweb.carol.cmi.ha.StatefulBeanReference;
045:        import org.objectweb.carol.cmi.ha.ReplicationManager;
046:        import org.objectweb.carol.cmi.ha.RequestId;
047:        import org.objectweb.carol.util.configuration.ConfigurationRepository;
048:        import org.objectweb.jonas.ha.EntityBeanRefImpl;
049:        import org.objectweb.jonas.ha.StatefulBeanRefImpl;
050:        import org.objectweb.jonas.ha.HaService;
051:        import org.objectweb.jonas.ha.interceptor.HACurrentDelegateImpl;
052:        import org.objectweb.jonas.service.ServiceException;
053:        import org.objectweb.jonas.service.ServiceManager;
054:        import org.objectweb.jonas_ejb.deployment.api.BeanDesc;
055:
056:        /**
057:         * This class implements common function for SFSB replication.
058:         * @author Francisco Perez-Sorrosal (fpsorrosal@no-spam@fi.upm.es)
059:         * @author Alberto Paz-Jimenez (apaz@no-spam@fi.upm.es)
060:         */
061:        class JRepUtil {
062:
063:            static boolean hasBackupResponse(RequestId requestId) {
064:                boolean result = false;
065:
066:                if (TraceCmi.isDebugCmiHA()) {
067:                    TraceCmi
068:                            .debugCmiHA("---------------------------------------");
069:                    TraceCmi.debugCmiHA("In hasBackupResponse for: "
070:                            + requestId);
071:                }
072:
073:                try {
074:                    // Only injects state during failover
075:                    if (HACurrentDelegateImpl.getCurrent().isOnFailover()) {
076:                        result = getRepMgr().hasBackupResponse(requestId);
077:                    }
078:                } catch (Exception e) {
079:                    TraceCmi.error("Unable to obtain the info", e);
080:                }
081:
082:                if (TraceCmi.isDebugCmiHA()) {
083:                    TraceCmi
084:                            .debugCmiHA("---------------------------------------");
085:                }
086:
087:                return result;
088:            }
089:
090:            /**
091:             * Injects the state of the bean if the cluster object id received in the
092:             * request is in the current node.
093:             * Only injects the state if we are on failover
094:             */
095:            static void injectState(ObjectId clusterOId, JStatefulSwitch bs) {
096:                if (TraceCmi.isDebugCmiHA()) {
097:                    TraceCmi
098:                            .debugCmiHA("---------------------------------------");
099:                    TraceCmi.debugCmiHA("In injectState for: " + clusterOId);
100:                }
101:
102:                try {
103:                    // Only injects state during failover
104:                    if (HACurrentDelegateImpl.getCurrent().isOnFailover()) {
105:                        StatefulBeanReference bean = new StatefulBeanRefImpl(bs);
106:                        getRepMgr().restoreBeanChanges(clusterOId, bean);
107:                    }
108:                } catch (Exception e) {
109:                    TraceCmi.error("Unable to replicate the state", e);
110:                }
111:
112:                if (TraceCmi.isDebugCmiHA()) {
113:                    TraceCmi
114:                            .debugCmiHA("---------------------------------------");
115:                }
116:            }
117:
118:            /**
119:             * Sets the clusterOId in the context, and if the bean does not implement 
120:             * isModifiedMethod stores the state in the context
121:             * @param bs the session switch
122:             * @param clusterOId the cluster object Id
123:             * @param rctx the request context
124:             */
125:            static void preInvokeHook(JSessionSwitch bs, ObjectId clusterOId,
126:                    RequestCtx rctx) {
127:                JRepUtil.setClusterOId(bs, clusterOId, rctx);
128:            }
129:
130:            static void postInvokeHook(RequestCtx rctx, ObjectId clusterOId,
131:                    JSessionSwitch bs, boolean remove) {
132:                if (TraceCmi.isDebugCmiHA()) {
133:                    TraceCmi
134:                            .debugCmiHA("---------------------------------------");
135:                    TraceCmi
136:                            .debugCmiHA("In PostInvoke hook for: " + clusterOId);
137:                }
138:
139:                // Create the rootId from the current HACtx/Thread association
140:                HACurrentDelegateImpl current = HACurrentDelegateImpl
141:                        .getCurrent();
142:                // Obtain the root request
143:                RequestId rootId = null;
144:                try {
145:                    rootId = (RequestId) current.getRequests().get(0);
146:
147:                    if (remove) {
148:                        JRepUtil.addRemovedBean(clusterOId, rootId);
149:                    } else {
150:                        JRepUtil.addModifiedBean((JStatefulSwitch) bs,
151:                                clusterOId, rootId);
152:                    }
153:                } catch (ArrayIndexOutOfBoundsException e) {
154:                    TraceCmi.debugCmiHA("Don't need to be replicate.");
155:                }
156:
157:                if (TraceCmi.isDebugCmiHA()) {
158:                    TraceCmi
159:                            .debugCmiHA("---------------------------------------");
160:                }
161:            }
162:
163:            /**
164:             * Adds a bean to the beans associated with rootId
165:             * @param bs the bean switch
166:             * @param clusterOId the cluster object id
167:             * @param rootId the root request id
168:             */
169:            static void addModifiedBean(JStatefulSwitch bs,
170:                    ObjectId clusterOId, RequestId rootId) {
171:                StatefulBeanReference bean = new StatefulBeanRefImpl(bs);
172:
173:                try {
174:                    getRepMgr().addModifiedBean(rootId, clusterOId, bean);
175:                } catch (Exception e) {
176:                    TraceCmi.error(
177:                            "Unable to add modified bean: " + clusterOId, e);
178:                }
179:            }
180:
181:            /**
182:             * Adds a bean to the beans associated with rootId marked for remove
183:             * @param clusterOId the cluster object id
184:             * @param rootId the root request id
185:             */
186:            public static void addRemovedBean(ObjectId clusterOId,
187:                    RequestId rootId) {
188:                try {
189:                    getRepMgr().addModifiedBean(rootId, clusterOId, null);
190:                } catch (Exception e) {
191:                    TraceCmi.error("Unable to add removed bean: " + clusterOId,
192:                            e);
193:                }
194:            }
195:
196:            /**
197:             * Adds an entity bean to the beans associated with rootId
198:             * @param bctx The entity context
199:             * @param rootId the root request id
200:             */
201:            public static void addEntityBean(JEntityContext bctx,
202:                    RequestId rootId) {
203:                EntityBeanReference bean = new EntityBeanRefImpl(bctx);
204:
205:                try {
206:                    getRepMgr().addEntityBean(rootId, bean);
207:                } catch (Exception e) {
208:                    try {
209:                        TraceCmi.error("Unable to add entity bean: "
210:                                + bean.getPrimaryKey(), e);
211:                    } catch (Exception e1) {
212:                        ;
213:                    }
214:                }
215:            }
216:
217:            /**
218:             * Get the remote object as a stub object for HA remote object LB
219:             * @param remote remote object
220:             * @param dd the deployment descriptor
221:             * @return get remote object
222:             * @throws RemoteException
223:             * @throws ServerConfigException
224:             * @throws NoSuchObjectException if the clustered object is not found in the
225:             *         CMI registry
226:             */
227:            public static Remote getHARemoteStub(Remote remote, BeanDesc dd)
228:                    throws RemoteException {
229:                String protocol = ConfigurationRepository
230:                        .getCurrentConfiguration().getProtocol().getName();
231:                if (protocol.equals("cmi")) {
232:                    StubData sd;
233:                    ClusterStub cs;
234:                    try {
235:                        Remote remObject = LowerOrb.getPRODelegate().toStub(
236:                                remote);
237:                        byte[] ser = CmiOutputStream.serialize(
238:                                dd.getJndiName(), remObject);
239:                        // Need to obtain an ObjectId from DistributedEquivSystem.
240:                        sd = new StubData(DistributedEquiv.getOidFactory()
241:                                .getId(), ser, 100);
242:                        sd.setKey(dd.getJndiName());
243:                        cs = StubConfig.instanciateClusterStub(remote
244:                                .getClass(), sd);
245:                    } catch (RemoteException e) {
246:                        e.printStackTrace();
247:                        throw e;
248:                    } catch (ServerConfigException e) {
249:                        e.printStackTrace();
250:                        throw new StubConfigException(e.getMessage());
251:                    }
252:                    return cs;
253:                }
254:
255:                return remote;
256:            }
257:
258:            /**
259:             * Replication manager
260:             */
261:            private static ReplicationManager repMgr = null;
262:
263:            /**
264:             * Get the replication manager
265:             * @return replication manager
266:             * @throws Exception if the replication manager is not set
267:             */
268:            static public ReplicationManager getRepMgr() throws Exception {
269:                // Get a reference to the replication manager from the HA service
270:                if (repMgr == null) {
271:                    try {
272:                        HaService svc = null;
273:                        try {
274:                            // Access the high-availability service (HA)
275:                            svc = (HaService) ServiceManager.getInstance()
276:                                    .getService("ha");
277:                        } catch (ServiceException se) {
278:                            se.printStackTrace();
279:                            throw se;
280:                        } catch (Exception e) {
281:                            e.printStackTrace();
282:                            throw e;
283:                        }
284:                        // Get the replication manager
285:                        repMgr = svc.getReplicationManager();
286:
287:                        if (repMgr == null) {
288:                            TraceCmi
289:                                    .error("unable to obtain Replication Manager (not set)");
290:                            throw new Exception(
291:                                    "unable to obtain Replication Manager");
292:                        }
293:                    } catch (Exception e) {
294:                        TraceCmi.error("unable to obtain Replication Manager",
295:                                e);
296:                        throw new Exception(
297:                                "unable to obtain Replication Manager");
298:                    }
299:                }
300:                return repMgr;
301:            }
302:
303:            /**
304:             * Sets the clusterOId in the context
305:             * @param bs the session switch
306:             * @param clusterOId the cluster object Id
307:             * @param rctx the request context
308:             */
309:            static private void setClusterOId(JSessionSwitch bs,
310:                    ObjectId clusterOId, RequestCtx rctx) {
311:                JRepStatefulContext jrsc;
312:                try {
313:                    jrsc = (JRepStatefulContext) bs.getICtx(rctx.currTx);
314:                    jrsc.setClusterOId(clusterOId);
315:                } catch (RemoteException e) {
316:                    e.printStackTrace();
317:                    TraceCmi.error("Unable to set clusterOId in context", e);
318:                }
319:            }
320:
321:        }
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