001: /*
002: * The Apache Software License, Version 1.1
003: *
004: *
005: * Copyright (c) 2002 The Apache Software Foundation. All rights
006: * 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 following disclaimer in
017: * the documentation and/or other materials provided with the
018: * distribution.
019: *
020: * 3. The end-user documentation included with the redistribution,
021: * if any, must include the following acknowledgment:
022: * "This product includes software developed by the
023: * Apache Software Foundation (http://www.apache.org/)."
024: * Alternately, this acknowledgment may appear in the software itself,
025: * if and wherever such third-party acknowledgments normally appear.
026: *
027: * 4. The names "WSIF" and "Apache Software Foundation" must
028: * not be used to endorse or promote products derived from this
029: * software without prior written permission. For written
030: * permission, please contact apache@apache.org.
031: *
032: * 5. Products derived from this software may not be called "Apache",
033: * nor may "Apache" appear in their name, without prior written
034: * permission of the Apache Software Foundation.
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 APACHE SOFTWARE FOUNDATION OR
040: * ITS 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 Apache Software Foundation and was
052: * originally based on software copyright (c) 2001, 2002, International
053: * Business Machines, Inc., http://www.apache.org. For more
054: * information on the Apache Software Foundation, please see
055: * <http://www.apache.org/>.
056: */
057:
058: package org.apache.wsif.util;
059:
060: import javax.naming.Context;
061: import javax.naming.InitialContext;
062:
063: import org.apache.wsif.WSIFConstants;
064: import org.apache.wsif.WSIFCorrelationService;
065: import org.apache.wsif.base.WSIFDefaultCorrelationService;
066: import org.apache.wsif.logging.MessageLogger;
067: import org.apache.wsif.logging.Trc;
068:
069: /**
070: * WSIFCorrelationServiceLocator is a helper class for locating
071: * the WSIFCorrelationService. This may either be the WSIF provided
072: * WSIFDefaultCorrelationService, or, when running in a managed
073: * container the container may provide its own implementation which
074: * this will locate by doing a JNDI lookup.
075: * @author Ant Elder <antelder@apache.org>
076: */
077: public class WSIFCorrelationServiceLocator {
078:
079: private static WSIFCorrelationService correlationService = findCorrelationService();
080:
081: /**
082: * Returns the WSIFCorrelationService to be used for persisting
083: * asynchronous requests. This attempts to locate a CorrelationService
084: * with a JNDI lookup for "java:comp/wsif/WSIFCorrelationService",
085: * if that fails then the WSIFDefaultCorrelationService is returned.
086: * @return a WSIFCorrelationService
087: */
088: static public WSIFCorrelationService getCorrelationService() {
089: Trc.entry(null);
090: Trc.exit(correlationService);
091: return correlationService;
092: }
093:
094: static private WSIFCorrelationService findCorrelationService() {
095: Trc.entry(null);
096: WSIFCorrelationService cs = null;
097: ;
098: try {
099: Context ctx = new InitialContext();
100: Object o = ctx
101: .lookup(WSIFConstants.CORRELATION_SERVICE_NAMESPACE);
102: if (o != null && o instanceof WSIFCorrelationService) {
103: cs = (WSIFCorrelationService) o;
104: }
105: } catch (Exception ex) {
106: Trc.ignoredException(ex);
107: } finally {
108: if (cs == null) {
109: cs = new WSIFDefaultCorrelationService();
110: }
111: }
112:
113: MessageLogger.log("WSIF.0009I", cs.getClass().getName());
114:
115: Trc.exit(cs);
116: return cs;
117: }
118: }
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