Source Code Cross Referenced for SessionFactory.java in  » J2EE » ow2-easybeans » org » ow2 » easybeans » container » session » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » ow2 easybeans » org.ow2.easybeans.container.session 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * EasyBeans
003:         * Copyright (C) 2006 Bull S.A.S.
004:         * Contact: easybeans@ow2.org
005:         *
006:         * This library is free software; you can redistribute it and/or
007:         * modify it under the terms of the GNU Lesser General Public
008:         * License as published by the Free Software Foundation; either
009:         * version 2.1 of the License, or any later version.
010:         *
011:         * This library is distributed in the hope that it will be useful,
012:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014:         * Lesser General Public License for more details.
015:         *
016:         * You should have received a copy of the GNU Lesser General Public
017:         * License along with this library; if not, write to the Free Software
018:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
019:         * USA
020:         *
021:         * --------------------------------------------------------------------------
022:         * $Id: SessionFactory.java 1970 2007-10-16 11:49:25Z benoitf $
023:         * --------------------------------------------------------------------------
024:         */package org.ow2.easybeans.container.session;
025:
026:        import org.ow2.easybeans.api.EZBContainer;
027:        import org.ow2.easybeans.api.FactoryException;
028:        import org.ow2.easybeans.api.bean.EasyBeansSB;
029:        import org.ow2.easybeans.api.bean.info.IBeanInfo;
030:        import org.ow2.easybeans.api.container.EZBSessionContext;
031:        import org.ow2.easybeans.api.pool.PoolException;
032:        import org.ow2.easybeans.container.AbsFactory;
033:        import org.ow2.easybeans.container.info.SessionBeanInfo;
034:        import org.ow2.easybeans.rpc.api.EJBRequest;
035:        import org.ow2.easybeans.rpc.api.EJBResponse;
036:        import org.ow2.util.log.Log;
037:        import org.ow2.util.log.LogFactory;
038:
039:        /**
040:         * This class manages the session bean and its creation/lifecycle.
041:         * @param <PoolType> the type of bean instance.
042:         * @author Florent Benoit
043:         */
044:        public abstract class SessionFactory<PoolType extends EasyBeansSB<PoolType>>
045:                extends AbsFactory<PoolType> {
046:
047:            /**
048:             * Logger.
049:             */
050:            private static Log logger = LogFactory.getLog(SessionFactory.class);
051:
052:            /**
053:             * Session Desc (deployment info).
054:             */
055:            private SessionBeanInfo sessionBeanInfo = null;
056:
057:            /**
058:             * Builds a new factory with a given name and its container.
059:             * @param className name of this factory (name of class that is managed)
060:             * @param container the root component of this factory.
061:             * @throws FactoryException if class can't be loaded.
062:             */
063:            public SessionFactory(final String className,
064:                    final EZBContainer container) throws FactoryException {
065:                super (className, container);
066:            }
067:
068:            /**
069:             * Stops the factory.
070:             */
071:            @Override
072:            public void stop() {
073:                super .stop();
074:
075:                // remove pool
076:                try {
077:                    getPool().stop();
078:                } catch (PoolException e) {
079:                    logger.error("Problem when stopping the factory", e);
080:                }
081:
082:            }
083:
084:            /**
085:             * @return information of the current bean.
086:             */
087:            public IBeanInfo getBeanInfo() {
088:                return sessionBeanInfo;
089:            }
090:
091:            /**
092:             * @return information of the current bean.
093:             */
094:            public SessionBeanInfo getSessionBeanInfo() {
095:                return sessionBeanInfo;
096:            }
097:
098:            /**
099:             * Sets the information object for a session bean.
100:             * @param sessionBeanInfo information on the bean.
101:             */
102:            public void setSessionBeanInfo(final SessionBeanInfo sessionBeanInfo) {
103:                this .sessionBeanInfo = sessionBeanInfo;
104:            }
105:
106:            /**
107:             * Gets a new ID or a null value.
108:             * @param beanId given id.
109:             * @return new id
110:             */
111:            protected abstract Long getId(final Long beanId);
112:
113:            /**
114:             * Creates an instance with the given hint.
115:             * @param clue a clue given by the Pool. Could be null.
116:             * @throws PoolException if instance cannot be created.
117:             * @return the created instance.
118:             */
119:            public PoolType create(final Long clue) throws PoolException {
120:                PoolType instance = null;
121:                ClassLoader oldClassLoader = Thread.currentThread()
122:                        .getContextClassLoader();
123:                Thread.currentThread().setContextClassLoader(
124:                        getContainer().getClassLoader());
125:                try {
126:                    try {
127:                        instance = getBeanClass().newInstance();
128:                    } catch (InstantiationException e) {
129:                        throw new PoolException("Cannot create a new instance",
130:                                e);
131:                    } catch (IllegalAccessException e) {
132:                        throw new PoolException("Cannot create a new instance",
133:                                e);
134:                    } catch (Exception e) {
135:                        throw new PoolException("Cannot create a new instance",
136:                                e);
137:                    }
138:                } finally {
139:                    Thread.currentThread()
140:                            .setContextClassLoader(oldClassLoader);
141:                }
142:
143:                // Set the factory
144:                instance.setEasyBeansFactory(this );
145:
146:                // Init the session Context
147:                EZBSessionContext<PoolType> sessionContext = new EasyBeansSessionContext<PoolType>(
148:                        instance);
149:                instance.setEasyBeansContext(sessionContext);
150:
151:                oldClassLoader = Thread.currentThread().getContextClassLoader();
152:                Thread.currentThread().setContextClassLoader(
153:                        getContainer().getClassLoader());
154:                try {
155:                    // Call injection
156:                    injectResources(instance);
157:
158:                    // post construct callback
159:                    instance.postConstructEasyBeansLifeCycle();
160:                } finally {
161:                    Thread.currentThread()
162:                            .setContextClassLoader(oldClassLoader);
163:                }
164:
165:                return instance;
166:            }
167:
168:            /**
169:             * A request comes to the bean factory and needs to be handled.<br>
170:             * A response is done which contains the answer.
171:             * @param request the EJB request.
172:             * @return a response that have been processed by the factory.
173:             */
174:            @Override
175:            public EJBResponse rpcInvoke(final EJBRequest request) {
176:                // get hash of the request
177:                long hash = request.getMethodHash();
178:
179:                // Get Args (use context classloader for the Serialization)
180:                Object[] args = null;
181:                ClassLoader oldClassLoader = Thread.currentThread()
182:                        .getContextClassLoader();
183:                Thread.currentThread().setContextClassLoader(
184:                        getContainer().getClassLoader());
185:                try {
186:                    args = request.getMethodArgs();
187:                } finally {
188:                    Thread.currentThread()
189:                            .setContextClassLoader(oldClassLoader);
190:                }
191:
192:                // call the method
193:                return localCall(hash, args, request.getBeanId());
194:
195:            }
196:
197:            /**
198:             * Gets a bean for the given id.
199:             * @param beanId id of the expected bean.
200:             * @return a Stateless bean.
201:             * @throws IllegalArgumentException if bean is not found.
202:             */
203:            protected abstract PoolType getBean(final Long beanId)
204:                    throws IllegalArgumentException;
205:
206:            /**
207:             * Do a local call on a method of this factory.
208:             * @param hash the hash of the method to execute.
209:             * @param methodArgs the arguments of the method
210:             * @param beanId the id of the bean that we want (stateful).
211:             * @return response container new id (if any) and value.
212:             */
213:            public abstract EJBResponse localCall(final long hash,
214:                    final Object[] methodArgs, final Long beanId);
215:
216:        }
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