Source Code Cross Referenced for CciLocalTransactionManager.java in  » J2EE » spring-framework-2.5 » org » springframework » jca » cci » connection » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » spring framework 2.5 » org.springframework.jca.cci.connection 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2002-2007 the original author or authors.
003:         *
004:         * Licensed under the Apache License, Version 2.0 (the "License");
005:         * you may not use this file except in compliance with the License.
006:         * You may obtain a copy of the License at
007:         *
008:         *      http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         * Unless required by applicable law or agreed to in writing, software
011:         * distributed under the License is distributed on an "AS IS" BASIS,
012:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         * See the License for the specific language governing permissions and
014:         * limitations under the License.
015:         */
016:
017:        package org.springframework.jca.cci.connection;
018:
019:        import javax.resource.NotSupportedException;
020:        import javax.resource.ResourceException;
021:        import javax.resource.cci.Connection;
022:        import javax.resource.cci.ConnectionFactory;
023:        import javax.resource.spi.LocalTransactionException;
024:
025:        import org.springframework.beans.factory.InitializingBean;
026:        import org.springframework.transaction.CannotCreateTransactionException;
027:        import org.springframework.transaction.TransactionDefinition;
028:        import org.springframework.transaction.TransactionException;
029:        import org.springframework.transaction.TransactionSystemException;
030:        import org.springframework.transaction.support.AbstractPlatformTransactionManager;
031:        import org.springframework.transaction.support.DefaultTransactionStatus;
032:        import org.springframework.transaction.support.TransactionSynchronizationManager;
033:        import org.springframework.transaction.support.ResourceTransactionManager;
034:
035:        /**
036:         * {@link org.springframework.transaction.PlatformTransactionManager} implementation
037:         * that manages local transactions for a single CCI ConnectionFactory.
038:         * Binds a CCI Connection from the specified ConnectionFactory to the thread,
039:         * potentially allowing for one thread-bound Connection per ConnectionFactory.
040:         *
041:         * <p>Application code is required to retrieve the CCI Connection via
042:         * {@link ConnectionFactoryUtils#getConnection(ConnectionFactory)} instead of a standard
043:         * J2EE-style {@link ConnectionFactory#getConnection()} call. Spring classes such as
044:         * {@link org.springframework.jca.cci.core.CciTemplate} use this strategy implicitly.
045:         * If not used in combination with this transaction manager, the
046:         * {@link ConnectionFactoryUtils} lookup strategy behaves exactly like the native
047:         * DataSource lookup; it can thus be used in a portable fashion.
048:         *
049:         * <p>Alternatively, you can allow application code to work with the standard
050:         * J2EE lookup pattern {@link ConnectionFactory#getConnection()}, for example
051:         * for legacy code that is not aware of Spring at all. In that case, define a
052:         * {@link TransactionAwareConnectionFactoryProxy} for your target ConnectionFactory,
053:         * which will automatically participate in Spring-managed transactions.
054:         *
055:         * @author Thierry Templier
056:         * @author Juergen Hoeller
057:         * @since 1.2
058:         * @see ConnectionFactoryUtils#getConnection(javax.resource.cci.ConnectionFactory)
059:         * @see ConnectionFactoryUtils#releaseConnection
060:         * @see TransactionAwareConnectionFactoryProxy
061:         * @see org.springframework.jca.cci.core.CciTemplate
062:         */
063:        public class CciLocalTransactionManager extends
064:                AbstractPlatformTransactionManager implements 
065:                ResourceTransactionManager, InitializingBean {
066:
067:            private ConnectionFactory connectionFactory;
068:
069:            /**
070:             * Create a new CciLocalTransactionManager instance.
071:             * A ConnectionFactory has to be set to be able to use it.
072:             * @see #setConnectionFactory
073:             */
074:            public CciLocalTransactionManager() {
075:            }
076:
077:            /**
078:             * Create a new CciLocalTransactionManager instance.
079:             * @param connectionFactory CCI ConnectionFactory to manage local transactions for
080:             */
081:            public CciLocalTransactionManager(
082:                    ConnectionFactory connectionFactory) {
083:                setConnectionFactory(connectionFactory);
084:                afterPropertiesSet();
085:            }
086:
087:            /**
088:             * Set the CCI ConnectionFactory that this instance should manage local
089:             * transactions for.
090:             */
091:            public void setConnectionFactory(ConnectionFactory cf) {
092:                if (cf instanceof  TransactionAwareConnectionFactoryProxy) {
093:                    // If we got a TransactionAwareConnectionFactoryProxy, we need to perform transactions
094:                    // for its underlying target ConnectionFactory, else JMS access code won't see
095:                    // properly exposed transactions (i.e. transactions for the target ConnectionFactory).
096:                    this .connectionFactory = ((TransactionAwareConnectionFactoryProxy) cf)
097:                            .getTargetConnectionFactory();
098:                } else {
099:                    this .connectionFactory = cf;
100:                }
101:            }
102:
103:            /**
104:             * Return the CCI ConnectionFactory that this instance manages local
105:             * transactions for.
106:             */
107:            public ConnectionFactory getConnectionFactory() {
108:                return this .connectionFactory;
109:            }
110:
111:            public void afterPropertiesSet() {
112:                if (getConnectionFactory() == null) {
113:                    throw new IllegalArgumentException(
114:                            "Property 'connectionFactory' is required");
115:                }
116:            }
117:
118:            public Object getResourceFactory() {
119:                return getConnectionFactory();
120:            }
121:
122:            protected Object doGetTransaction() {
123:                CciLocalTransactionObject txObject = new CciLocalTransactionObject();
124:                ConnectionHolder conHolder = (ConnectionHolder) TransactionSynchronizationManager
125:                        .getResource(getConnectionFactory());
126:                txObject.setConnectionHolder(conHolder);
127:                return txObject;
128:            }
129:
130:            protected boolean isExistingTransaction(Object transaction) {
131:                CciLocalTransactionObject txObject = (CciLocalTransactionObject) transaction;
132:                // Consider a pre-bound connection as transaction.
133:                return (txObject.getConnectionHolder() != null);
134:            }
135:
136:            protected void doBegin(Object transaction,
137:                    TransactionDefinition definition) {
138:                CciLocalTransactionObject txObject = (CciLocalTransactionObject) transaction;
139:
140:                Connection con = null;
141:
142:                try {
143:                    con = getConnectionFactory().getConnection();
144:                    if (logger.isDebugEnabled()) {
145:                        logger.debug("Acquired Connection [" + con
146:                                + "] for local CCI transaction");
147:                    }
148:
149:                    txObject.setConnectionHolder(new ConnectionHolder(con));
150:                    txObject.getConnectionHolder()
151:                            .setSynchronizedWithTransaction(true);
152:
153:                    con.getLocalTransaction().begin();
154:                    int timeout = determineTimeout(definition);
155:                    if (timeout != TransactionDefinition.TIMEOUT_DEFAULT) {
156:                        txObject.getConnectionHolder().setTimeoutInSeconds(
157:                                timeout);
158:                    }
159:                    TransactionSynchronizationManager.bindResource(
160:                            getConnectionFactory(), txObject
161:                                    .getConnectionHolder());
162:                }
163:
164:                catch (NotSupportedException ex) {
165:                    ConnectionFactoryUtils.releaseConnection(con,
166:                            getConnectionFactory());
167:                    throw new CannotCreateTransactionException(
168:                            "CCI Connection does not support local transactions",
169:                            ex);
170:                } catch (LocalTransactionException ex) {
171:                    ConnectionFactoryUtils.releaseConnection(con,
172:                            getConnectionFactory());
173:                    throw new CannotCreateTransactionException(
174:                            "Could not begin local CCI transaction", ex);
175:                } catch (ResourceException ex) {
176:                    ConnectionFactoryUtils.releaseConnection(con,
177:                            getConnectionFactory());
178:                    throw new TransactionSystemException(
179:                            "Unexpected failure on begin of CCI local transaction",
180:                            ex);
181:                }
182:            }
183:
184:            protected Object doSuspend(Object transaction) {
185:                CciLocalTransactionObject txObject = (CciLocalTransactionObject) transaction;
186:                txObject.setConnectionHolder(null);
187:                return TransactionSynchronizationManager
188:                        .unbindResource(getConnectionFactory());
189:            }
190:
191:            protected void doResume(Object transaction,
192:                    Object suspendedResources) {
193:                ConnectionHolder conHolder = (ConnectionHolder) suspendedResources;
194:                TransactionSynchronizationManager.bindResource(
195:                        getConnectionFactory(), conHolder);
196:            }
197:
198:            protected boolean isRollbackOnly(Object transaction)
199:                    throws TransactionException {
200:                CciLocalTransactionObject txObject = (CciLocalTransactionObject) transaction;
201:                return txObject.getConnectionHolder().isRollbackOnly();
202:            }
203:
204:            protected void doCommit(DefaultTransactionStatus status) {
205:                CciLocalTransactionObject txObject = (CciLocalTransactionObject) status
206:                        .getTransaction();
207:                Connection con = txObject.getConnectionHolder().getConnection();
208:                if (status.isDebug()) {
209:                    logger
210:                            .debug("Committing CCI local transaction on Connection ["
211:                                    + con + "]");
212:                }
213:                try {
214:                    con.getLocalTransaction().commit();
215:                } catch (LocalTransactionException ex) {
216:                    throw new TransactionSystemException(
217:                            "Could not commit CCI local transaction", ex);
218:                } catch (ResourceException ex) {
219:                    throw new TransactionSystemException(
220:                            "Unexpected failure on commit of CCI local transaction",
221:                            ex);
222:                }
223:            }
224:
225:            protected void doRollback(DefaultTransactionStatus status) {
226:                CciLocalTransactionObject txObject = (CciLocalTransactionObject) status
227:                        .getTransaction();
228:                Connection con = txObject.getConnectionHolder().getConnection();
229:                if (status.isDebug()) {
230:                    logger
231:                            .debug("Rolling back CCI local transaction on Connection ["
232:                                    + con + "]");
233:                }
234:                try {
235:                    con.getLocalTransaction().rollback();
236:                } catch (LocalTransactionException ex) {
237:                    throw new TransactionSystemException(
238:                            "Could not roll back CCI local transaction", ex);
239:                } catch (ResourceException ex) {
240:                    throw new TransactionSystemException(
241:                            "Unexpected failure on rollback of CCI local transaction",
242:                            ex);
243:                }
244:            }
245:
246:            protected void doSetRollbackOnly(DefaultTransactionStatus status) {
247:                CciLocalTransactionObject txObject = (CciLocalTransactionObject) status
248:                        .getTransaction();
249:                if (status.isDebug()) {
250:                    logger.debug("Setting CCI local transaction ["
251:                            + txObject.getConnectionHolder().getConnection()
252:                            + "] rollback-only");
253:                }
254:                txObject.getConnectionHolder().setRollbackOnly();
255:            }
256:
257:            protected void doCleanupAfterCompletion(Object transaction) {
258:                CciLocalTransactionObject txObject = (CciLocalTransactionObject) transaction;
259:
260:                // Remove the connection holder from the thread.
261:                TransactionSynchronizationManager
262:                        .unbindResource(getConnectionFactory());
263:                txObject.getConnectionHolder().clear();
264:
265:                Connection con = txObject.getConnectionHolder().getConnection();
266:                if (logger.isDebugEnabled()) {
267:                    logger.debug("Releasing CCI Connection [" + con
268:                            + "] after transaction");
269:                }
270:                ConnectionFactoryUtils.releaseConnection(con,
271:                        getConnectionFactory());
272:            }
273:
274:            /**
275:             * CCI local transaction object, representing a ConnectionHolder.
276:             * Used as transaction object by CciLocalTransactionManager.
277:             * @see ConnectionHolder
278:             */
279:            private static class CciLocalTransactionObject {
280:
281:                private ConnectionHolder connectionHolder;
282:
283:                public void setConnectionHolder(
284:                        ConnectionHolder connectionHolder) {
285:                    this .connectionHolder = connectionHolder;
286:                }
287:
288:                public ConnectionHolder getConnectionHolder() {
289:                    return connectionHolder;
290:                }
291:            }
292:
293:        }
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