/*
* Jopr Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation, and/or the GNU Lesser
* General Public License, version 2.1, also 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 and the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* and the GNU Lesser General Public License along with this program;
* if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.rhq.plugins.jbossas.util;
import java.util.List;
import java.lang.management.ManagementFactory;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jetbrains.annotations.Nullable;
import org.mc4j.ems.connection.bean.EmsBean;
import org.rhq.core.pluginapi.inventory.ResourceContext;
/**
* Utility methods for working with JBoss MBeans.
*
* @author Ian Springer
*/
public class JBossMBeanUtility {
private static final Log LOG = LogFactory.getLog(JBossMBeanUtility.class);
private JBossMBeanUtility() {
}
public static MBeanServer getJBossMBeanServer() {
List<MBeanServer> servers = MBeanServerFactory.findMBeanServer(null);
MBeanServer jbossServer = null;
for (MBeanServer server : servers) {
if ("jboss".equals(server.getDefaultDomain())) {
jbossServer = server;
}
}
if (jbossServer == null) {
jbossServer = ManagementFactory.getPlatformMBeanServer();
}
return jbossServer;
}
/**
* Returns true if the specified JBossAS EMS bean is deployed and in the Started state, or false otherwise.
*
* @param emsBean a JBossAS EMS bean
* @param resourceContext the resource context for the JON resource corresponding to the EMS bean
*
* @return true if the specified JBoss EMS bean is deployed and in the "Started" state, or false otherwise
*/
public static boolean isStarted(EmsBean emsBean, @Nullable
ResourceContext resourceContext) {
try {
return ("Started".equals(emsBean.getAttribute("StateString").refresh()));
} catch (NullPointerException npe) {
if (resourceContext != null) {
LOG.warn("Could not determine availability of unknown EMS bean for ["
+ resourceContext.getResourceType() + ":" + resourceContext.getResourceKey() + "]");
}
return false;
}
}
}