Source Code Cross Referenced for Jotm.java in  » Database-JDBC-Connection-Pool » jotm-2.0.10 » org » objectweb » jotm » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database JDBC Connection Pool » jotm 2.0.10 » org.objectweb.jotm 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * @(#) Jotm.java
003:         *
004:         * JOTM: Java Open Transaction Manager 
005:         *
006:         *
007:         * This module was originally developed by 
008:         *
009:         *  - Bull S.A. as part of the JOnAS application server code released in 
010:         *    July 1999 (www.bull.com)
011:         * 
012:         * --------------------------------------------------------------------------
013:         *  The original code and portions created by Bull SA are 
014:         *  Copyright (c) 1999 BULL SA  
015:         *  All rights reserved.
016:         *  
017:         * Redistribution and use in source and binary forms, with or without 
018:         * modification, are permitted provided that the following conditions are met:
019:         *
020:         * -Redistributions of source code must retain the above copyright notice, this
021:         * list of conditions and the following disclaimer. 
022:         *
023:         * -Redistributions in binary form must reproduce the above copyright notice, 
024:         * this list of conditions and the following disclaimer in the documentation 
025:         * and/or other materials provided with the distribution. 
026:         *
027:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
028:         * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
029:         * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
030:         * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
031:         * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
032:         * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
033:         * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
034:         * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
035:         * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
036:         * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
037:         * POSSIBILITY OF SUCH DAMAGE.
038:         * 
039:         * --------------------------------------------------------------------------
040:         * $Id: Jotm.java,v 1.6 2003/12/05 18:14:44 trentshue Exp $
041:         * --------------------------------------------------------------------------
042:         */
043:        package org.objectweb.jotm;
044:
045:        import java.rmi.NoSuchObjectException;
046:        import java.rmi.RemoteException;
047:
048:        import javax.naming.Context;
049:        import javax.naming.InitialContext;
050:        import javax.naming.NamingException;
051:        import javax.rmi.PortableRemoteObject;
052:        import javax.transaction.UserTransaction;
053:
054:        import org.objectweb.carol.util.configuration.ConfigurationRepository;
055:        import org.objectweb.carol.util.configuration.ConfigurationException;
056:        import org.objectweb.transaction.jta.TMService;
057:        import org.objectweb.transaction.jta.TransactionManager;
058:
059:        /**
060:         *  This  class represents an instance of JOTM.
061:         * 
062:         * @author jeff mesnil
063:         */
064:        public class Jotm implements  TMService {
065:
066:            /**
067:             * Current instance
068:             */
069:            Current current = null;
070:
071:            /**
072:             * TransactionRecovery instance
073:             */
074:            TransactionRecovery transactionrecovery = null;
075:
076:            /** 
077:             * JNDI name of the TransactionFactory
078:             */
079:            private static final String TMFACTORY_NAME = "TMFactory";
080:
081:            /**
082:             * TransactionFactory
083:             */
084:            private TransactionFactory tf = null;
085:
086:            /**
087:             * is the TransactionFactory is local or not
088:             */
089:            private boolean local;
090:
091:            /**
092:             * is the TransactionFacotory bound to JNDI or not
093:             */
094:            private boolean bound;
095:
096:            /**
097:             * has binding of TransactionFactory fails
098:             */
099:            private boolean boundFailed = false;
100:
101:            /**
102:             * Public constructor for Jotm.
103:             *
104:             * If Jotm is created with a <code>local</code> transaction factory which is
105:             * not <code>bound</code> to a registry, Jotm would be able to manage
106:             * transactions only inside the same JVM.
107:             * @param local <code>true</code> to create an instance of JOTM with a
108:             * local transaction factory, <code>false</code> else
109:             * @param bound <code>true</code> if the transaction factory is to be
110:             *  bound in a registry, <code>false</code> else (ignored if 
111:             * <code>local<code> is <code>false</code>)
112:             * 
113:             * @throws NamingException thrown if the transaction factory can't be bound
114:             * or looked up in a registry
115:             */
116:            public Jotm(boolean local, boolean bound) throws NamingException {
117:                if (TraceTm.jotm.isInfoEnabled()) {
118:                    TraceTm.jotm.info("JOTM started with a "
119:                            + (local ? "local" : "remote")
120:                            + " transaction factory" + " which is "
121:                            + (bound ? "" : "not") + " bound.");
122:                }
123:
124:                this .local = local;
125:                this .bound = bound;
126:                // CAROL initialization
127:                TraceTm.jotm.info("CAROL initialization");
128:
129:                try {
130:                    ConfigurationRepository.init();
131:                } catch (ConfigurationException e) {
132:                    TraceTm.jotm.error("CAROL initialization failed", e);
133:                }
134:
135:                if (local) {
136:                    try {
137:                        tf = new TransactionFactoryImpl();
138:                    } catch (RemoteException e) {
139:                        // should not happen: TransactionFactoryImpl throws 
140:                        // RemoteException only because it extends Remote interface
141:                        TraceTm.jotm
142:                                .error(
143:                                        "Instanciation of TransactionFactory failed",
144:                                        e);
145:                    }
146:
147:                    if (bound) {
148:                        Context ictx;
149:                        try {
150:                            ictx = new InitialContext();
151:                            ictx.rebind(TMFACTORY_NAME, tf);
152:
153:                            if (TraceTm.jotm.isDebugEnabled()) {
154:                                TraceTm.jotm
155:                                        .debug("TransactionFactory bound with name "
156:                                                + TMFACTORY_NAME);
157:                            }
158:                        } catch (NamingException e) {
159:                            TraceTm.jotm.error(
160:                                    "TransactionFactory rebind failed", e);
161:                            boundFailed = true;
162:                            throw e;
163:                        }
164:                    }
165:                } else {
166:                    Context ictx;
167:
168:                    try {
169:                        ictx = new InitialContext();
170:                        tf = (TransactionFactory) ictx.lookup(TMFACTORY_NAME);
171:                    } catch (NamingException e) {
172:                        TraceTm.jotm.error("TransactionFactory lookup failed",
173:                                e);
174:                        throw e;
175:                    }
176:                }
177:
178:                try {
179:                    current = new Current(tf);
180:                } catch (Exception e) {
181:                    ;
182:                }
183:
184:            }
185:
186:            /**
187:             * @see org.objectweb.transaction.jta.TMService#getTransactionManager()
188:             */
189:            public TransactionManager getTransactionManager() {
190:                if (TraceTm.jotm.isDebugEnabled()) {
191:                    TraceTm.jotm.debug("TransactionManager=" + current);
192:                }
193:                return (TransactionManager) current;
194:            }
195:
196:            /**
197:             * @see org.objectweb.transaction.jta.TMService#getTransactionManager()
198:             */
199:            public TransactionRecovery getTransactionRecovery() {
200:                transactionrecovery = (TransactionRecovery) Current
201:                        .getTransactionRecovery();
202:                if (TraceTm.jotm.isDebugEnabled()) {
203:                    TraceTm.jotm.debug("TransactionRecovery="
204:                            + transactionrecovery);
205:                }
206:                return transactionrecovery;
207:            }
208:
209:            /**
210:             * @see org.objectweb.transaction.jta.TMService#getUserTransaction()
211:             */
212:            public UserTransaction getUserTransaction() {
213:                if (TraceTm.jotm.isDebugEnabled()) {
214:                    TraceTm.jotm.debug("UserTransaction=" + current);
215:                }
216:                return (UserTransaction) current;
217:            }
218:
219:            /**
220:             * @see org.objectweb.transaction.jta.TMService#stop()
221:             */
222:            public void stop() {
223:                TraceTm.jotm.info("stop JOTM");
224:                // remove current transaction if there's still one in ThreadLocal
225:
226:                try {
227:                    current.forget();
228:                } catch (Exception e) {
229:                    ;
230:                }
231:
232:                try {
233:                    transactionrecovery.forget();
234:                } catch (Exception e) {
235:                    ;
236:                }
237:
238:                // unexport remote objects
239:                if (local) {
240:                    if (bound && !boundFailed) {
241:                        try {
242:                            InitialContext ictx = new InitialContext();
243:                            ictx.unbind(TMFACTORY_NAME);
244:
245:                            if (TraceTm.jotm.isDebugEnabled()) {
246:                                TraceTm.jotm
247:                                        .debug("TransactionFactory unbound");
248:                            }
249:                        } catch (Exception e) {
250:                            TraceTm.jotm.warn(
251:                                    "an exception has prevented the TransactionFactory"
252:                                            + " to be unbound", e);
253:                        }
254:                    }
255:
256:                    if (tf != null) {
257:                        try {
258:                            PortableRemoteObject.unexportObject(tf);
259:
260:                            if (TraceTm.jotm.isDebugEnabled()) {
261:                                TraceTm.jotm
262:                                        .debug("TransactionFactory unexported");
263:                            }
264:                        } catch (NoSuchObjectException e) {
265:                            TraceTm.jotm.warn(
266:                                    "an exception has prevented the TransactionFactory"
267:                                            + " to be unbound", e);
268:                        }
269:                    }
270:                }
271:                tf = null;
272:            }
273:        }
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