001: /*
002: * ====================================================================
003: *
004: * XFLOW - Process Management System
005: * Copyright (C) 2003 Rob Tan
006: * All rights reserved.
007: *
008: * Redistribution and use in source and binary forms, with or without
009: * modification, are permitted provided that the following conditions
010: * are met:
011: *
012: * 1. Redistributions of source code must retain the above copyright
013: * notice, this list of conditions, and the following disclaimer.
014: *
015: * 2. Redistributions in binary form must reproduce the above copyright
016: * notice, this list of conditions, and the disclaimer that follows
017: * these conditions in the documentation and/or other materials
018: * provided with the distribution.
019: *
020: * 3. The name "XFlow" must not be used to endorse or promote products
021: * derived from this software without prior written permission. For
022: * written permission, please contact rcktan@yahoo.com
023: *
024: * 4. Products derived from this software may not be called "XFlow", nor
025: * may "XFlow" appear in their name, without prior written permission
026: * from the XFlow Project Management (rcktan@yahoo.com)
027: *
028: * In addition, we request (but do not require) that you include in the
029: * end-user documentation provided with the redistribution and/or in the
030: * software itself an acknowledgement equivalent to the following:
031: * "This product includes software developed by the
032: * XFlow Project (http://xflow.sourceforge.net/)."
033: * Alternatively, the acknowledgment may be graphical using the logos
034: * available at http://xflow.sourceforge.net/
035: *
036: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
037: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
038: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
039: * DISCLAIMED. IN NO EVENT SHALL THE XFLOW AUTHORS OR THE PROJECT
040: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
041: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
042: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
043: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
044: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
045: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
046: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
047: * SUCH DAMAGE.
048: *
049: * ====================================================================
050: * This software consists of voluntary contributions made by many
051: * individuals on behalf of the XFlow Project and was originally
052: * created by Rob Tan (rcktan@yahoo.com)
053: * For more information on the XFlow Project, please see:
054: * <http://xflow.sourceforge.net/>.
055: * ====================================================================
056: */
057: package xflow.messaging;
058:
059: import java.util.*;
060: import java.io.*;
061: import java.net.*;
062: import javax.jms.*;
063: import javax.naming.*;
064: import org.apache.log4j.Logger;
065:
066: import xflow.common.*;
067:
068: public class JMSTopicConnection {
069:
070: private static InitialContext iniCtx;
071: private static TopicConnection conn = null;
072: private static boolean initialized = false;
073:
074: private static Logger log = Logger
075: .getLogger(JMSTopicConnection.class);
076:
077: static {
078:
079: try {
080: // Tomcat doesn't seem to find jndi.properties -- so we might have to load manually
081: boolean jndiFileFound = true;
082: File f = new File("jndi.properties");
083: try {
084: FileReader fr = new FileReader(f);
085: } catch (FileNotFoundException e) {
086: jndiFileFound = false;
087: }
088:
089: if (jndiFileFound) {
090: System.out.println("Loading from jndi.properties file");
091: Properties props = new Properties();
092: props.load(new FileInputStream("jndi.properties"));
093: String namingFactory = (String) props
094: .get("java.naming.factory.initial");
095: String providerUrl = (String) props
096: .get("java.naming.provider.url");
097: String factoryUrlPkg = (String) props
098: .get("java.naming.factory.url.pkgs");
099: Hashtable env = new Hashtable();
100: env.put("java.naming.factory.initial", namingFactory);
101: env.put("java.naming.provider.url", providerUrl);
102: env.put("java.naming.factory.url.pkgs", factoryUrlPkg);
103: iniCtx = new InitialContext(env);
104: } else {
105: iniCtx = new InitialContext();
106: }
107:
108: Object tmp = iniCtx
109: .lookup(XflowConstants.XFLOW_CONNECTION_FACTORY);
110: TopicConnectionFactory tcf = (TopicConnectionFactory) tmp;
111: conn = tcf.createTopicConnection();
112: } catch (Exception e) {
113: e.printStackTrace();
114: }
115: }
116:
117: public static void initialize() throws JMSException {
118:
119: if (initialized) {
120: return;
121: }
122: initialized = true;
123: JMSShutdownHook shook = new JMSShutdownHook();
124: Runtime.getRuntime().addShutdownHook(shook);
125: start();
126: }
127:
128: public static TopicConnection getConnection() {
129: return conn;
130: }
131:
132: public static InitialContext getInitialContext() {
133: return iniCtx;
134: }
135:
136: public static void start() throws JMSException {
137: log.info("Starting connection");
138: conn.start();
139: }
140:
141: public static void stop() throws JMSException {
142: log.info("Stopping connection");
143: conn.stop();
144: }
145:
146: public static void close() throws JMSException {
147: log.info("Closing connection");
148: conn.close();
149: }
150: }
|