Source Code Cross Referenced for ENCManager.java in  » J2EE » ow2-easybeans » org » ow2 » easybeans » naming » interceptors » 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.naming.interceptors 
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: ENCManager.java 1970 2007-10-16 11:49:25Z benoitf $
023:         * --------------------------------------------------------------------------
024:         */package org.ow2.easybeans.naming.interceptors;
025:
026:        import javax.naming.Context;
027:
028:        import org.ow2.easybeans.api.Factory;
029:        import org.ow2.easybeans.api.naming.NamingInterceptor;
030:        import org.ow2.util.log.Log;
031:        import org.ow2.util.log.LogFactory;
032:
033:        /**
034:         * Detects the server type and return the correct interceptor to use depending
035:         * of the application server. It could be EasyBeans, JOnAS or Tomcat.
036:         * @author Florent Benoit
037:         */
038:        public final class ENCManager {
039:
040:            /**
041:             * Logger.
042:             */
043:            private static Log logger = LogFactory.getLog(ENCManager.class);
044:
045:            /**
046:             * Class used for the interceptor.
047:             */
048:            private static Class<? extends NamingInterceptor> encInterceptor = null;
049:
050:            /**
051:             * No public constructor (utility class).
052:             */
053:            private ENCManager() {
054:
055:            }
056:
057:            /**
058:             * Sets the ENC interceptor to use for the naming.
059:             * @param userEncInterceptor the interceptor class.
060:             */
061:            public static void setInterceptorClass(
062:                    final Class<? extends NamingInterceptor> userEncInterceptor) {
063:                if (encInterceptor != null) {
064:                    throw new IllegalStateException(
065:                            "The interceptor class has already been set with '"
066:                                    + encInterceptor
067:                                    + "', cannot update it with '"
068:                                    + userEncInterceptor + "'.");
069:                }
070:                encInterceptor = userEncInterceptor;
071:            }
072:
073:            /**
074:             * @return the class to use depending of the application server.
075:             */
076:            public static Class<? extends NamingInterceptor> getInterceptorClass() {
077:                if (encInterceptor == null) {
078:                    ClassLoader loader = Thread.currentThread()
079:                            .getContextClassLoader();
080:
081:                    // try to load JOnAS class.
082:                    try {
083:                        loader
084:                                .loadClass(JOnASENCInterceptor.JONAS_NAMING_MANAGER_CLASS);
085:                        encInterceptor = JOnASENCInterceptor.class;
086:                        logger
087:                                .info("Detecting JOnAS: using JOnAS ENC for the naming.");
088:                    } catch (ClassNotFoundException e) {
089:                        // not found, try with Tomcat
090:                        try {
091:                            loader
092:                                    .loadClass(TomcatENCInterceptor.TOMCAT_NAMING_CLASS);
093:                            encInterceptor = TomcatENCInterceptor.class;
094:                            logger
095:                                    .info("Detecting Tomcat: using Tomcat ENC for the naming.");
096:                        } catch (ClassNotFoundException e1) {
097:                            // Not found, try with Jetty
098:                            try {
099:                                loader
100:                                        .loadClass(JettyENCInterceptor.JETTY_CONTEXT_FACTORY_CLASS);
101:                                encInterceptor = JettyENCInterceptor.class;
102:                                logger
103:                                        .info("Detecting Jetty: using Jetty ENC for the naming.");
104:                            } catch (ClassNotFoundException e2) {
105:                                // Not found, use EZB.
106:                                encInterceptor = EZBENCInterceptor.class;
107:                                logger
108:                                        .debug("Using EasyBeans ENC for the naming.");
109:                            }
110:                        }
111:
112:                    }
113:
114:                }
115:                return encInterceptor;
116:            }
117:
118:            /**
119:             * Init the context for the given factory.
120:             * @param factory the given factory
121:             * @param context the context associated to the container URL.
122:             */
123:            public static void initContext(final Factory factory,
124:                    final Context context) {
125:                try {
126:                    encInterceptor.newInstance().initContext(factory.getId(),
127:                            context);
128:                } catch (InstantiationException e) {
129:                    throw new IllegalStateException(
130:                            "Cannot init the context for the factory '"
131:                                    + factory.getClassName()
132:                                    + "' of container '"
133:                                    + factory.getContainer().getName() + "'.",
134:                            e);
135:                } catch (IllegalAccessException e) {
136:                    throw new IllegalStateException(
137:                            "Cannot init the context for the factory '"
138:                                    + factory.getClassName()
139:                                    + "' of container '"
140:                                    + factory.getContainer().getName() + "'.",
141:                            e);
142:                }
143:            }
144:
145:            /**
146:             * Remove the context associated to a factory.
147:             * @param factory the given factory
148:             */
149:            public static void removeContext(final Factory factory) {
150:                try {
151:                    encInterceptor.newInstance().removeContext(factory.getId());
152:                } catch (InstantiationException e) {
153:                    throw new IllegalStateException(
154:                            "Cannot remove the context for the factory '"
155:                                    + factory.getClassName()
156:                                    + "' of container '"
157:                                    + factory.getContainer().getName() + "'.",
158:                            e);
159:                } catch (IllegalAccessException e) {
160:                    throw new IllegalStateException(
161:                            "Cannot remove the context for the factory '"
162:                                    + factory.getClassName()
163:                                    + "' of container '"
164:                                    + factory.getContainer().getName() + "'.",
165:                            e);
166:                }
167:            }
168:
169:        }
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