001: /*--
002:
003: Copyright (C) 2002-2005 Adrian Price.
004: All rights reserved.
005:
006: Redistribution and use in source and binary forms, with or without
007: modification, are permitted provided that the following conditions
008: are met:
009:
010: 1. Redistributions of source code must retain the above copyright
011: notice, this list of conditions, and the following disclaimer.
012:
013: 2. Redistributions in binary form must reproduce the above copyright
014: notice, this list of conditions, and the disclaimer that follows
015: these conditions in the documentation and/or other materials
016: provided with the distribution.
017:
018: 3. The names "OBE" and "Open Business Engine" must not be used to
019: endorse or promote products derived from this software without prior
020: written permission. For written permission, please contact
021: adrianprice@sourceforge.net.
022:
023: 4. Products derived from this software may not be called "OBE" or
024: "Open Business Engine", nor may "OBE" or "Open Business Engine"
025: appear in their name, without prior written permission from
026: Adrian Price (adrianprice@users.sourceforge.net).
027:
028: THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
029: WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
030: OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
031: DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
032: INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
033: (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
034: SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
035: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
036: STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
037: IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
038: POSSIBILITY OF SUCH DAMAGE.
039:
040: For more information on OBE, please see
041: <http://obe.sourceforge.net/>.
042:
043: */
044:
045: package org.obe.server.j2ee.service;
046:
047: import org.apache.commons.logging.Log;
048: import org.apache.commons.logging.LogFactory;
049: import org.obe.server.j2ee.ejb.EJBHelper;
050: import org.obe.server.j2ee.ejb.JMSMessageProducerLocal;
051: import org.obe.spi.service.AsyncManager;
052: import org.obe.spi.service.ServiceManager;
053: import org.obe.spi.util.AsyncStartActivity;
054: import org.obe.spi.util.AsyncStartProcess;
055:
056: import javax.jms.Queue;
057:
058: /**
059: * Enqueues asynchronous execution requests via a JMS queue.
060: *
061: * @author Adrian Price
062: */
063: public final class JMSAsyncManager implements AsyncManager {
064: private static final Log _logger = LogFactory
065: .getLog(JMSAsyncManager.class);
066: private static final String ASYNC_QUEUE_JNDI = "java:comp/env/jms/AsyncRequestQueue";
067: private final ServiceManager _svcMgr;
068: private Queue ASYNC_QUEUE;
069:
070: public JMSAsyncManager(ServiceManager svcMgr) {
071: _svcMgr = svcMgr;
072: }
073:
074: public void asyncRequest(AsyncRequest target) {
075: try {
076: if (_logger.isDebugEnabled()) {
077: _logger.debug("Enqueuing request " + target);
078: }
079: JMSMessageProducerLocal msgProducer = EJBHelper
080: .getJMSMessageProducerHome().create();
081: msgProducer.send(ASYNC_QUEUE, target, null);
082: msgProducer.remove();
083: } catch (Exception e) {
084: _logger.error("Error enqueueing request", e);
085: }
086: }
087:
088: public void asyncStartActivity(String processInstanceId,
089: String activityInstanceId) {
090:
091: asyncRequest(new AsyncStartActivity(processInstanceId,
092: activityInstanceId));
093: }
094:
095: public void asyncStartProcess(String processInstanceId) {
096: asyncRequest(new AsyncStartProcess(processInstanceId));
097: }
098:
099: public ServiceManager getServiceManager() {
100: return _svcMgr;
101: }
102:
103: public String getServiceName() {
104: return SERVICE_NAME;
105: }
106:
107: public void init() {
108: ASYNC_QUEUE = (Queue) EJBHelper.getJndiObject(ASYNC_QUEUE_JNDI);
109: }
110:
111: public void exit() {
112: ASYNC_QUEUE = null;
113: }
114: }
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