Java tutorial
/* * NOTE: This copyright does *not* cover user programs that use HQ * program services by normal system calls through the application * program interfaces provided as part of the Hyperic Plug-in Development * Kit or the Hyperic Client Development Kit - this is merely considered * normal use of the program, and does *not* fall under the heading of * "derived work". * * Copyright (C) [2004, 2005, 2006], Hyperic, Inc. * This file is part of HQ. * * HQ is free software; you can redistribute it and/or modify * it under the terms version 2 of the GNU General Public License as * published by the Free Software Foundation. This program is distributed * in the hope that it will be useful, but WITHOUT ANY WARRANTY; without * even the implied warranty of MERCHANTABILITY or FITNESS FOR A * PARTICULAR PURPOSE. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA. */ package org.hyperic.hq.bizapp.server.mdb; import java.util.ArrayList; import java.util.Collection; import java.util.List; import javax.jms.JMSException; import javax.jms.Message; import javax.jms.MessageListener; import javax.jms.ObjectMessage; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.hyperic.hq.authz.server.shared.ResourceDeletedException; import org.hyperic.hq.events.AbstractEvent; import org.hyperic.hq.events.LoggableInterface; import org.hyperic.hq.events.server.session.EventLog; import org.hyperic.hq.events.shared.EventLogManager; import org.springframework.beans.factory.annotation.Autowired; /** * The LoggingDispatcher Message-Drive Bean is intended to be used * to log Events. * * Bound to topic/eventsTopic */ public class LoggingDispatcherImpl implements MessageListener { private final Log log = LogFactory.getLog(LoggingDispatcherImpl.class); private EventLogManager eventLogManager; @Autowired public LoggingDispatcherImpl(EventLogManager eventLogManager) { this.eventLogManager = eventLogManager; } @SuppressWarnings("unchecked") public void onMessage(Message inMessage) { if (!(inMessage instanceof ObjectMessage)) { return; } ObjectMessage om = (ObjectMessage) inMessage; try { Object obj = om.getObject(); if (obj instanceof AbstractEvent) { AbstractEvent event = (AbstractEvent) obj; logEvent(event); } else if (obj instanceof Collection<?>) { Collection<AbstractEvent> events = (Collection<AbstractEvent>) obj; logEvents(events); } } catch (JMSException e) { log.error("Cannot open message object", e); } } /** * Log the event if it supports logging. * * @param event The event. */ private void logEvent(AbstractEvent event) { try { if (event.isLoggingSupported()) { LoggableInterface le = (LoggableInterface) event; eventLogManager.createLog(event, le.getSubject(), le.getLevelString(), true); } } catch (ResourceDeletedException e) { log.debug(e); } } private void logEvents(Collection<AbstractEvent> events) { List<EventLog> loggableEvents = new ArrayList<EventLog>(); for (AbstractEvent event : events) { try { if (event.isLoggingSupported()) { LoggableInterface le = (LoggableInterface) event; EventLog eventLog = eventLogManager.createLog(event, le.getSubject(), le.getLevelString(), false); loggableEvents.add(eventLog); } } catch (ResourceDeletedException e) { log.debug(e); } } if (!loggableEvents.isEmpty()) { eventLogManager.insertEventLogs(loggableEvents.toArray(new EventLog[loggableEvents.size()])); } } }