Mercurial > hg > release > thermostat-1.0
view thread/harvester/src/main/java/com/redhat/thermostat/thread/harvester/ThreadBackend.java @ 1412:a0592d702416
Update copyright year in release branch.
reviewed-by: neugens
review-thread: http://icedtea.classpath.org/pipermail/thermostat/2014-June/009965.html
PR1821
author | Jon VanAlten <jon.vanalten@redhat.com> |
---|---|
date | Tue, 03 Jun 2014 11:55:56 -0600 |
parents | f7961cf1e440 |
children |
line wrap: on
line source
/* * Copyright 2012-2014 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.thread.harvester; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.logging.Logger; import com.redhat.thermostat.agent.VmStatusListener; import com.redhat.thermostat.agent.VmStatusListenerRegistrar; import com.redhat.thermostat.agent.command.ReceiverRegistry; import com.redhat.thermostat.backend.BaseBackend; import com.redhat.thermostat.common.Pair; import com.redhat.thermostat.common.Version; import com.redhat.thermostat.common.utils.LoggingUtils; public class ThreadBackend extends BaseBackend implements VmStatusListener { private static final Logger logger = LoggingUtils.getLogger(ThreadBackend.class); private final ReceiverRegistry registry; private final ThreadHarvester harvester; private boolean active = false; private VmStatusListenerRegistrar vmListener; private final List<Pair<String, Integer>> vmsToHarvestOnEnable = new ArrayList<>(); public ThreadBackend(Version version, VmStatusListenerRegistrar registrar, ReceiverRegistry registry, ThreadHarvester harvester) { super("VM Thread Backend", "Gathers thread information about a JVM", "Red Hat, Inc", version.getVersionNumber()); this.vmListener = registrar; this.registry = registry; this.harvester = harvester; } @Override public int getOrderValue() { return ORDER_THREAD_GROUP; } @Override public boolean activate() { if (active) { return true; } // bring back all harvesters that were active Iterator<Pair<String, Integer>> iter = vmsToHarvestOnEnable.iterator(); while (iter.hasNext()) { Pair<String, Integer> saved = iter.next(); harvester.startHarvester(saved.getFirst(), saved.getSecond()); iter.remove(); } vmListener.register(this); registry.registerReceiver(harvester); active = true; return true; } @Override public boolean deactivate() { if (!active) { return true; } vmListener.unregister(this); registry.unregisterReceivers(); // stop all currently active harvesters vmsToHarvestOnEnable.addAll(harvester.stopAndRemoveAllHarvesters()); active = false; return true; } @Override public boolean isActive() { return active; } @Override public void vmStatusChanged(Status newStatus, String vmId, int pid) { switch (newStatus) { case VM_STARTED: case VM_ACTIVE: /* this is blocking */ harvester.saveVmCaps(vmId, pid); harvester.addThreadHarvestingStatus(vmId); break; case VM_STOPPED: harvester.stopHarvester(vmId); break; default: logger.warning("Unexpected VM state: " + newStatus); } } }