001: /*
002: * JBoss, Home of Professional Open Source.
003: * Copyright 2006, Red Hat Middleware LLC, and individual contributors
004: * as indicated by the @author tags. See the copyright.txt file in the
005: * distribution for a full listing of individual contributors.
006: *
007: * This is free software; you can redistribute it and/or modify it
008: * under the terms of the GNU Lesser General Public License as
009: * published by the Free Software Foundation; either version 2.1 of
010: * the License, or (at your option) any later version.
011: *
012: * This software is distributed in the hope that it will be useful,
013: * but WITHOUT ANY WARRANTY; without even the implied warranty of
014: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015: * Lesser General Public License for more details.
016: *
017: * You should have received a copy of the GNU Lesser General Public
018: * License along with this software; if not, write to the Free
019: * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020: * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
021: */
022: package org.jboss.ejb.txtimer;
023:
024: // $Id: EJBTimerServiceLocator.java 57209 2006-09-26 12:21:57Z dimitris@jboss.org $
025:
026: import javax.ejb.TimerService;
027: import javax.management.MBeanServer;
028: import javax.management.ObjectName;
029:
030: import org.jboss.ejb.Container;
031: import org.jboss.logging.Logger;
032: import org.jboss.mx.util.MBeanProxyExt;
033: import org.jboss.mx.util.MBeanServerLocator;
034:
035: /**
036: * Locates the EJBTimerService, either as MBean or as local instance.
037: *
038: * It first checks if the EJBTimerServiceImpl is registered with the MBeanServer,
039: * if not it creates a singleton and uses that.
040: *
041: * @author Thomas.Diesler@jboss.org
042: * @author Dimitris.Andreadis@jboss.org
043: * @version $Revision: 57209 $
044: * @since 07-Apr-2004
045: */
046: public class EJBTimerServiceLocator {
047: // logging support
048: private static Logger log = Logger
049: .getLogger(EJBTimerServiceLocator.class);
050:
051: private static EJBTimerService ejbTimerService;
052:
053: /**
054: * Locates the EJBTimerService, first as MBean, then as singleton
055: */
056: public static EJBTimerService getEjbTimerService() {
057: try {
058: // First try the MBean server
059: MBeanServer server = MBeanServerLocator.locateJBoss();
060: if (server != null
061: && server.isRegistered(EJBTimerService.OBJECT_NAME))
062: ejbTimerService = new MBeanDelegate(server);
063: } catch (Exception ignore) {
064: }
065:
066: // This path can be used for standalone test cases
067: if (ejbTimerService == null) {
068: EJBTimerServiceImpl ejbTimerServiceImpl = new EJBTimerServiceImpl();
069: ejbTimerService = ejbTimerServiceImpl;
070: try {
071: ejbTimerServiceImpl.create();
072: ejbTimerServiceImpl.start();
073: } catch (Exception e) {
074: throw new RuntimeException(
075: "Cannot start EJBTimerService", e);
076: }
077: }
078: return ejbTimerService;
079: }
080:
081: /**
082: * Delegates method calls to the EJBTimerService to the MBean server
083: */
084: public static class MBeanDelegate implements EJBTimerService {
085: private EJBTimerService mbeanEjbTimerService;
086:
087: public MBeanDelegate(MBeanServer server) {
088: try {
089: mbeanEjbTimerService = (EJBTimerService) MBeanProxyExt
090: .create(EJBTimerService.class,
091: EJBTimerService.OBJECT_NAME, server);
092: } catch (Exception e) {
093: throw new IllegalStateException(
094: "Cannot create EJBTimerService proxy: "
095: + e.getMessage());
096: }
097: }
098:
099: public TimerService createTimerService(ObjectName containerId,
100: Object instancePk, Container container)
101: throws IllegalStateException {
102: try {
103: TimerService timerService = mbeanEjbTimerService
104: .createTimerService(containerId, instancePk,
105: container);
106: return timerService;
107: } catch (Exception e) {
108: log.error("Cannot createTimerService", e);
109: return null;
110: }
111: }
112:
113: public TimerService createTimerService(ObjectName containerId,
114: Object instancePk, TimedObjectInvoker invoker)
115: throws IllegalStateException {
116: try {
117: TimerService timerService = mbeanEjbTimerService
118: .createTimerService(containerId, instancePk,
119: invoker);
120: return timerService;
121: } catch (Exception e) {
122: log.error("Cannot createTimerService", e);
123: return null;
124: }
125: }
126:
127: public TimerService getTimerService(ObjectName containerId,
128: Object instancePk) throws IllegalStateException {
129: try {
130: TimerService timerService = mbeanEjbTimerService
131: .getTimerService(containerId, instancePk);
132: return timerService;
133: } catch (Exception e) {
134: log.error("Cannot getTimerService", e);
135: return null;
136: }
137: }
138:
139: public void removeTimerService(ObjectName containerId,
140: Object instancePk) throws IllegalStateException {
141: try {
142: mbeanEjbTimerService.removeTimerService(containerId,
143: instancePk);
144: } catch (Exception e) {
145: log.error("Cannot removeTimerService", e);
146: }
147: }
148:
149: public void removeTimerService(ObjectName containerId,
150: boolean keepState) throws IllegalStateException {
151: try {
152: mbeanEjbTimerService.removeTimerService(containerId,
153: keepState);
154: } catch (Exception e) {
155: log.error("Cannot removeTimerService", e);
156: }
157: }
158:
159: public void restoreTimers(ObjectName containerId,
160: ClassLoader loader) throws IllegalStateException {
161: try {
162: mbeanEjbTimerService.restoreTimers(containerId, loader);
163: } catch (Exception e) {
164: log.error("Cannot restoreTimer", e);
165: }
166: }
167: }
168: }
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