Mercurial > hg > release > thermostat-0.5
view vm-gc/agent/src/main/java/com/redhat/thermostat/vm/gc/agent/internal/VmGcBackend.java @ 895:ceb28ef8f9e8
Create VM GC agent and common bundles
This commit extracts VM GC data collection from SystemBackend and related
classes to a vm-gc-agent bundle. It also moves the VmGcStatDAO from
common-core to a vm-gc-common bundle that registers the DAO once Storage
is available. This also removes the DAO from DAOFactory.
Reviewed-by: omajid
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2013-January/004997.html
author | Elliott Baron <ebaron@redhat.com> |
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date | Mon, 07 Jan 2013 15:50:59 -0500 |
parents | |
children | 421d8a954893 6815308bb362 |
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/* * Copyright 2013 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat 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 Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.vm.gc.agent.internal; import java.net.URISyntaxException; import java.util.logging.Level; import java.util.logging.Logger; import sun.jvmstat.monitor.HostIdentifier; import sun.jvmstat.monitor.MonitorException; import sun.jvmstat.monitor.MonitoredHost; import com.redhat.thermostat.backend.Backend; import com.redhat.thermostat.backend.BackendID; import com.redhat.thermostat.backend.BackendsProperties; import com.redhat.thermostat.common.Version; import com.redhat.thermostat.common.utils.LoggingUtils; import com.redhat.thermostat.vm.gc.common.VmGcStatDAO; public class VmGcBackend extends Backend { private static final Logger LOGGER = LoggingUtils.getLogger(VmGcBackend.class); private VmGcStatDAO vmGcStats; private HostIdentifier hostId; private MonitoredHost host; private VmGcHostListener hostListener; private boolean started; public VmGcBackend(VmGcStatDAO vmGcStatDAO, Version version) { super(new BackendID("VM GC Backend", VmGcBackend.class.getName())); this.vmGcStats = vmGcStatDAO; setConfigurationValue(BackendsProperties.VENDOR.name(), "Red Hat, Inc."); setConfigurationValue(BackendsProperties.DESCRIPTION.name(), "Gathers garbage collection statistics about a JVM"); setConfigurationValue(BackendsProperties.VERSION.name(), version.getVersionNumber()); try { hostId = new HostIdentifier((String) null); host = MonitoredHost.getMonitoredHost(hostId); hostListener = new VmGcHostListener(vmGcStats, attachToNewProcessByDefault()); } catch (MonitorException me) { LOGGER.log(Level.WARNING, "Problems with connecting jvmstat to local machine", me); } catch (URISyntaxException use) { LOGGER.log(Level.WARNING, "Failed to create host identifier", use); } } @Override public boolean activate() { if (!started && host != null) { try { host.addHostListener(hostListener); started = true; } catch (MonitorException me) { LOGGER.log(Level.WARNING, "problems with connecting jvmstat to local machine", me); } } return started; } @Override public boolean deactivate() { if (started && host != null) { try { host.removeHostListener(hostListener); started = false; } catch (MonitorException me) { LOGGER.log(Level.INFO, "something went wrong in jvmstat's listening to this host"); } } return !started; } @Override public boolean isActive() { return started; } @Override protected void setDAOFactoryAction() { // No need for DAOFactory } @Override public String getConfigurationValue(String key) { return null; } @Override public boolean attachToNewProcessByDefault() { return true; } @Override public int getOrderValue() { return ORDER_MEMORY_GROUP + 20; } /* * For testing purposes only. */ void setHost(MonitoredHost host) { this.host = host; } }