001: /*
002: * $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/naming/factory/TyrexFactory.java,v 1.1 2002/06/28 12:44:41 remm Exp $
003: * $Revision: 1.1 $
004: * $Date: 2002/06/28 12:44:41 $
005: *
006: * ====================================================================
007: *
008: * The Apache Software License, Version 1.1
009: *
010: * Copyright (c) 1999 The Apache Software Foundation. All rights
011: * reserved.
012: *
013: * Redistribution and use in source and binary forms, with or without
014: * modification, are permitted provided that the following conditions
015: * are met:
016: *
017: * 1. Redistributions of source code must retain the above copyright
018: * notice, this list of conditions and the following disclaimer.
019: *
020: * 2. Redistributions in binary form must reproduce the above copyright
021: * notice, this list of conditions and the following disclaimer in
022: * the documentation and/or other materials provided with the
023: * distribution.
024: *
025: * 3. The end-user documentation included with the redistribution, if
026: * any, must include the following acknowlegement:
027: * "This product includes software developed by the
028: * Apache Software Foundation (http://www.apache.org/)."
029: * Alternately, this acknowlegement may appear in the software itself,
030: * if and wherever such third-party acknowlegements normally appear.
031: *
032: * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
033: * Foundation" must not be used to endorse or promote products derived
034: * from this software without prior written permission. For written
035: * permission, please contact apache@apache.org.
036: *
037: * 5. Products derived from this software may not be called "Apache"
038: * nor may "Apache" appear in their names without prior written
039: * permission of the Apache Group.
040: *
041: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
042: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
043: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
044: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
045: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
046: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
047: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
048: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
049: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
050: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
051: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
052: * SUCH DAMAGE.
053: * ====================================================================
054: *
055: * This software consists of voluntary contributions made by many
056: * individuals on behalf of the Apache Software Foundation. For more
057: * information on the Apache Software Foundation, please see
058: * <http://www.apache.org/>.
059: *
060: * [Additional notices, if required by prior licensing conditions]
061: *
062: */
063:
064: package org.apache.naming.factory;
065:
066: import java.net.URL;
067: import javax.naming.InitialContext;
068: import javax.naming.NamingException;
069: import javax.naming.spi.ObjectFactory;
070: import tyrex.tm.TransactionDomain;
071: import tyrex.tm.DomainConfigurationException;
072: import tyrex.tm.RecoveryException;
073:
074: /**
075: * Abstract superclass of any factory that creates objects from Tyrex.<br>
076: *
077: * Subclasses can use getTransactionDomain() to handle the retrieval and
078: * creation of the TransactionDomain.
079: *
080: * Tyrex is an open-source transaction manager, developed by Assaf Arkin and
081: * exolab.org. See the <a href="http://tyrex.exolab.org/">Tyrex homepage</a>
082: * for more details about Tyrex and downloads.
083: *
084: * @author David Haraburda
085: * @version $Revision: 1.1 $ $Date: 2002/06/28 12:44:41 $
086: */
087:
088: public abstract class TyrexFactory implements ObjectFactory {
089:
090: // ----------------------------------------------------------- Constructors
091:
092: // -------------------------------------------------------------- Constants
093:
094: // ----------------------------------------------------- Instance Variables
095:
096: // ------------------------------------------------------ Protected Methods
097:
098: /**
099: * Get (and if necessary, create) the active TransactionDomain
100: *
101: * This class checks to see if there is already a TransactionDomain
102: * setup and instantiated. If so, it is returned, otherwise one is
103: * created and initialized using properties obtained from JNDI.
104: */
105: protected TransactionDomain getTransactionDomain()
106: throws NamingException {
107: TransactionDomain domain = null;
108: InitialContext initCtx = new InitialContext();
109: String config = initCtx.lookup(
110: "java:comp/env/" + Constants.TYREX_DOMAIN_CONFIG)
111: .toString();
112: String name = initCtx.lookup(
113: "java:comp/env/" + Constants.TYREX_DOMAIN_NAME)
114: .toString();
115: if (config != null && name != null) {
116: try {
117: domain = TransactionDomain.getDomain(name);
118: } catch (Throwable t) {
119: // Tyrex throws exceptions if required classes aren't found.
120: log("Error loading Tyrex TransactionDomain", t);
121: throw new NamingException(
122: "Exception loading TransactionDomain: "
123: + t.getMessage());
124: }
125: if ((domain == null)
126: || (domain.getState() == TransactionDomain.TERMINATED)) {
127: URL configURL = Thread.currentThread()
128: .getContextClassLoader().getResource(config);
129: if (configURL == null)
130: throw new NamingException(
131: "Could not load Tyrex domain config file");
132: try {
133: domain = TransactionDomain.createDomain(configURL
134: .toString());
135: } catch (DomainConfigurationException dce) {
136: throw new NamingException(
137: "Could not create TransactionDomain: "
138: + dce.getMessage());
139: }
140: }
141:
142: } else {
143: throw new NamingException(
144: "Specified config file or domain name "
145: + "parameters are invalid.");
146: }
147:
148: if (domain.getState() == TransactionDomain.READY) {
149: try {
150: domain.recover();
151: } catch (RecoveryException re) {
152: throw new NamingException(
153: "Could not activate TransactionDomain: "
154: + re.getMessage());
155: }
156: }
157:
158: return domain;
159: }
160:
161: // -------------------------------------------------------- Private Methods
162:
163: private void log(String message) {
164: System.out.print("TyrexFactory: ");
165: System.out.println(message);
166: }
167:
168: private void log(String message, Throwable exception) {
169: log(message);
170: exception.printStackTrace(System.out);
171: }
172:
173: }
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