Source Code Cross Referenced for TransactionMetaData.java in  » Database-JDBC-Connection-Pool » sequoia-2.10.9 » org » continuent » sequoia » controller » requestmanager » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database JDBC Connection Pool » sequoia 2.10.9 » org.continuent.sequoia.controller.requestmanager 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * Sequoia: Database clustering technology.
003:         * Copyright (C) 2002-2004 French National Institute For Research In Computer
004:         * Science And Control (INRIA).
005:         * Copyright (C) 2005 AmicoSoft, Inc. dba Emic Networks
006:         * Contact: sequoia@continuent.org
007:         * 
008:         * Licensed under the Apache License, Version 2.0 (the "License");
009:         * you may not use this file except in compliance with the License.
010:         * You may obtain a copy of the License at
011:         * 
012:         * http://www.apache.org/licenses/LICENSE-2.0
013:         * 
014:         * Unless required by applicable law or agreed to in writing, software
015:         * distributed under the License is distributed on an "AS IS" BASIS,
016:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017:         * See the License for the specific language governing permissions and
018:         * limitations under the License. 
019:         *
020:         * Initial developer(s): Emmanuel Cecchet.
021:         * Contributor(s): Peter Royal.
022:         */package org.continuent.sequoia.controller.requestmanager;
023:
024:        import java.io.Serializable;
025:        import java.util.HashMap;
026:        import java.util.LinkedList;
027:        import java.util.List;
028:        import java.util.Map;
029:
030:        import org.continuent.sequoia.common.locks.TransactionLogicalLock;
031:        import org.continuent.sequoia.controller.backend.DatabaseBackend;
032:
033:        /**
034:         * This class carry transaction metadata including the transaction state.
035:         * <p>
036:         * Metadata include a transaction id, a login and a timeout. The state is used
037:         * to track if a transaction is read-only or read-write and what kind of write
038:         * accesses have been made in the transaction in case invalidations are needed
039:         * at commit or rollback time.
040:         * <p>
041:         * The type is made serializable only for unlog messages that have to be sent
042:         * between controllers.
043:         * 
044:         * @author <a href="mailto:emmanuel.cecchet@emicnetworks.com">Emmanuel Cecchet</a>
045:         * @version 2.2
046:         */
047:        public class TransactionMetaData implements  Serializable {
048:            private static final long serialVersionUID = -5251053474824677394L;
049:
050:            private final long transactionId;
051:            private long timeout;
052:            private long timestamp;
053:            private String login;
054:            private final boolean isPersistentConnection;
055:            private final long persistentConnectionId;
056:            /** Recovery log id of the last commit/rollback operation on this transaction */
057:            private transient long logId;
058:            /** Map of Lists of locksMap taken by this task, indexed by backend */
059:            private transient Map locksMap = new HashMap();
060:            private transient boolean altersAggregateList = false;
061:            private transient boolean altersDatabaseCatalog = false;
062:            private transient boolean altersDatabaseSchema = false;
063:            private transient boolean altersMetadataCache = false;
064:            private transient boolean altersQueryResultCache = false;
065:            private transient boolean altersSomething = false;
066:            private transient boolean altersStoredProcedureList = false;
067:            private transient boolean altersUserDefinedTypes = false;
068:            private transient boolean altersUsers = false;
069:            private transient boolean isReadOnly = true;
070:
071:            /**
072:             * Creates a new <code>TransactionMetaData</code>.
073:             * 
074:             * @param transactionId the transaction identifier.
075:             * @param timeout the transaction timeout in seconds.
076:             * @param login the user login.
077:             * @param isPersistentConnection true if the transaction is started on a
078:             *          persistent connection
079:             * @param persistentConnectionId persistent connection id if the transaction
080:             *          must be started on a persistent connection
081:             */
082:            public TransactionMetaData(long transactionId, long timeout,
083:                    String login, boolean isPersistentConnection,
084:                    long persistentConnectionId) {
085:                this .transactionId = transactionId;
086:                this .timeout = timeout;
087:                this .login = login;
088:                this .isPersistentConnection = isPersistentConnection;
089:                this .persistentConnectionId = persistentConnectionId;
090:                this .timestamp = System.currentTimeMillis();
091:            }
092:
093:            /**
094:             * Add a lock to the list of locks acquired by the given backend on this
095:             * transaction
096:             * 
097:             * @param backend backend acquiring the lock
098:             * @param lock the lock that has been acquired
099:             */
100:            public synchronized void addAcquiredLock(DatabaseBackend backend,
101:                    TransactionLogicalLock lock) {
102:                LinkedList acquiredLocks = (LinkedList) locksMap.get(backend);
103:                if (acquiredLocks == null) {
104:                    acquiredLocks = new LinkedList();
105:                    locksMap.put(backend, acquiredLocks);
106:                }
107:                acquiredLocks.add(lock);
108:            }
109:
110:            /**
111:             * Add locks to the list of locks acquired by the given backend on this
112:             * transaction
113:             * 
114:             * @param backend backend acquiring the locks
115:             * @param locks the locks that have been acquired
116:             */
117:            public synchronized void addAcquiredLocks(DatabaseBackend backend,
118:                    List locks) {
119:                LinkedList acquiredLocks = (LinkedList) locksMap.get(backend);
120:                if (acquiredLocks == null) {
121:                    acquiredLocks = new LinkedList();
122:                    locksMap.put(backend, acquiredLocks);
123:                }
124:                acquiredLocks.addAll(locks);
125:            }
126:
127:            /**
128:             * Returns the altersAggregateList value.
129:             * 
130:             * @return Returns the altersAggregateList.
131:             */
132:            public final boolean altersAggregateList() {
133:                return altersAggregateList;
134:            }
135:
136:            /**
137:             * Returns the altersDatabaseCatalog value.
138:             * 
139:             * @return Returns the altersDatabaseCatalog.
140:             */
141:            public final boolean altersDatabaseCatalog() {
142:                return altersDatabaseCatalog;
143:            }
144:
145:            /**
146:             * Returns the altersDatabaseSchema value.
147:             * 
148:             * @return Returns the altersDatabaseSchema.
149:             */
150:            public final boolean altersDatabaseSchema() {
151:                return altersDatabaseSchema;
152:            }
153:
154:            /**
155:             * Returns the altersMetadataCache value.
156:             * 
157:             * @return Returns the altersMetadataCache.
158:             */
159:            public final boolean altersMetadataCache() {
160:                return altersMetadataCache;
161:            }
162:
163:            /**
164:             * Returns the altersQueryResultCache value.
165:             * 
166:             * @return Returns the altersQueryResultCache.
167:             */
168:            public final boolean altersQueryResultCache() {
169:                return altersQueryResultCache;
170:            }
171:
172:            /**
173:             * Returns the altersSomething value.
174:             * 
175:             * @return Returns the altersSomething.
176:             */
177:            public final boolean altersSomething() {
178:                return altersSomething;
179:            }
180:
181:            /**
182:             * Returns the altersStoredProcedureList value.
183:             * 
184:             * @return Returns the altersStoredProcedureList.
185:             */
186:            public final boolean altersStoredProcedureList() {
187:                return altersStoredProcedureList;
188:            }
189:
190:            /**
191:             * Returns the altersUserDefinedTypes value.
192:             * 
193:             * @return Returns the altersUserDefinedTypes.
194:             */
195:            public final boolean altersUserDefinedTypes() {
196:                return altersUserDefinedTypes;
197:            }
198:
199:            /**
200:             * Returns the altersUsers value.
201:             * 
202:             * @return Returns the altersUsers.
203:             */
204:            public final boolean altersUsers() {
205:                return altersUsers;
206:            }
207:
208:            /**
209:             * Return the list of locks acquired by the given backend for this transaction
210:             * or null if no lock has been acquired so far.
211:             * 
212:             * @param backend backend for which we want to retrieve to set of locks
213:             * @return the list of acquired locks for the given backend
214:             */
215:            public List getAcquiredLocks(DatabaseBackend backend) {
216:                return (List) locksMap.get(backend);
217:            }
218:
219:            /**
220:             * Returns the logId value.
221:             * 
222:             * @return Returns the logId.
223:             */
224:            public final long getLogId() {
225:                return logId;
226:            }
227:
228:            /**
229:             * Sets the logId value.
230:             * 
231:             * @param logId The logId to set.
232:             */
233:            public final void setLogId(long logId) {
234:                this .logId = logId;
235:            }
236:
237:            /**
238:             * Gets creation's timestamp of this TransactionMetaData.
239:             * 
240:             * @return the timestamp corresponding to the creation of this TransactionMetaData.
241:             */
242:            public long getTimestamp() {
243:                return timestamp;
244:            }
245:
246:            /**
247:             * Returns the login.
248:             * 
249:             * @return String
250:             */
251:            public String getLogin() {
252:                return login;
253:            }
254:
255:            /**
256:             * Returns the persistent connection id (only meaningful is
257:             * isPersistentConnection is true).
258:             * 
259:             * @return Returns the persistent connection id.
260:             * @see #isPersistentConnection()
261:             */
262:            public final long getPersistentConnectionId() {
263:                return persistentConnectionId;
264:            }
265:
266:            /**
267:             * Returns the timeout.
268:             * 
269:             * @return long
270:             */
271:            public long getTimeout() {
272:                return timeout;
273:            }
274:
275:            /**
276:             * Returns the transactionId.
277:             * 
278:             * @return int
279:             */
280:            public long getTransactionId() {
281:                return transactionId;
282:            }
283:
284:            /**
285:             * Returns true if at least one backend is holding locks for this
286:             * transactions.
287:             * 
288:             * @return true if a backend has locks for the transactions
289:             */
290:            public boolean isLockedByBackends() {
291:                return !locksMap.isEmpty();
292:            }
293:
294:            /**
295:             * Returns true if the transaction executes on a persistent connection
296:             * (retrieve the value using getPersistentConnectionId).
297:             * 
298:             * @return Returns true if transaction uses a persistent connection.
299:             * @see #getPersistentConnectionId()
300:             */
301:            public final boolean isPersistentConnection() {
302:                return isPersistentConnection;
303:            }
304:
305:            /**
306:             * Returns true if the transaction is read-only (true by default).
307:             * 
308:             * @return Returns the isReadOnly.
309:             */
310:            public final boolean isReadOnly() {
311:                return isReadOnly;
312:            }
313:
314:            /**
315:             * Remove and return the lock list belonging to a backend.
316:             * 
317:             * @param backend backend which locks should be removed
318:             * @return the lock list or null if no lock were found for this backend
319:             */
320:            public List removeBackendLocks(DatabaseBackend backend) {
321:                return (List) locksMap.remove(backend);
322:            }
323:
324:            /**
325:             * Sets the altersAggregateList value.
326:             * 
327:             * @param altersAggregateList The altersAggregateList to set.
328:             */
329:            public final void setAltersAggregateList(boolean altersAggregateList) {
330:                this .altersAggregateList = altersAggregateList;
331:            }
332:
333:            /**
334:             * Sets the altersDatabaseCatalog value.
335:             * 
336:             * @param altersDatabaseCatalog The altersDatabaseCatalog to set.
337:             */
338:            public final void setAltersDatabaseCatalog(
339:                    boolean altersDatabaseCatalog) {
340:                this .altersDatabaseCatalog = altersDatabaseCatalog;
341:            }
342:
343:            /**
344:             * Sets the altersDatabaseSchema value.
345:             * 
346:             * @param altersDatabaseSchema The altersDatabaseSchema to set.
347:             */
348:            public final void setAltersDatabaseSchema(
349:                    boolean altersDatabaseSchema) {
350:                this .altersDatabaseSchema = altersDatabaseSchema;
351:            }
352:
353:            /**
354:             * Sets the altersMetadataCache value.
355:             * 
356:             * @param altersMetadataCache The altersMetadataCache to set.
357:             */
358:            public final void setAltersMetadataCache(boolean altersMetadataCache) {
359:                this .altersMetadataCache = altersMetadataCache;
360:            }
361:
362:            /**
363:             * Sets the altersQueryResultCache value.
364:             * 
365:             * @param altersQueryResultCache The altersQueryResultCache to set.
366:             */
367:            public final void setAltersQueryResultCache(
368:                    boolean altersQueryResultCache) {
369:                this .altersQueryResultCache = altersQueryResultCache;
370:            }
371:
372:            /**
373:             * Sets the altersSomething value.
374:             * 
375:             * @param altersSomething The altersSomething to set.
376:             */
377:            public final void setAltersSomething(boolean altersSomething) {
378:                this .altersSomething = altersSomething;
379:            }
380:
381:            /**
382:             * Sets the altersStoredProcedureList value.
383:             * 
384:             * @param altersStoredProcedureList The altersStoredProcedureList to set.
385:             */
386:            public final void setAltersStoredProcedureList(
387:                    boolean altersStoredProcedureList) {
388:                this .altersStoredProcedureList = altersStoredProcedureList;
389:            }
390:
391:            /**
392:             * Sets the altersUserDefinedTypes value.
393:             * 
394:             * @param altersUserDefinedTypes The altersUserDefinedTypes to set.
395:             */
396:            public final void setAltersUserDefinedTypes(
397:                    boolean altersUserDefinedTypes) {
398:                this .altersUserDefinedTypes = altersUserDefinedTypes;
399:            }
400:
401:            /**
402:             * Sets the altersUsers value.
403:             * 
404:             * @param altersUsers The altersUsers to set.
405:             */
406:            public final void setAltersUsers(boolean altersUsers) {
407:                this .altersUsers = altersUsers;
408:            }
409:
410:            /**
411:             * Sets the isReadOnly value.
412:             * 
413:             * @param isReadOnly The isReadOnly to set.
414:             */
415:            public final void setReadOnly(boolean isReadOnly) {
416:                this .isReadOnly = isReadOnly;
417:            }
418:
419:            /**
420:             * Sets the login.
421:             * 
422:             * @param login the login to set.
423:             */
424:            public void setLogin(String login) {
425:                this .login = login;
426:            }
427:
428:            /**
429:             * Sets the timeout.
430:             * 
431:             * @param timeout the timeout to set.
432:             */
433:            public void setTimeout(long timeout) {
434:                this .timeout = timeout;
435:            }
436:
437:            /**
438:             * @see java.lang.Object#equals(java.lang.Object)
439:             */
440:            public boolean equals(Object obj) {
441:                if (obj instanceof  TransactionMetaData) {
442:                    TransactionMetaData tm = (TransactionMetaData) obj;
443:                    return tm.getTransactionId() == transactionId;
444:                }
445:                return false;
446:            }
447:
448:            /**
449:             * @see java.lang.Object#hashCode()
450:             */
451:            public int hashCode() {
452:                return (int) transactionId;
453:            }
454:        }
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