Mercurial > hg > release > thermostat-1.0
view storage/core/src/main/java/com/redhat/thermostat/storage/monitor/internal/HostMonitorImpl.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 | 7a0ff324a833 |
children |
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/* * 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.storage.monitor.internal; import java.util.ArrayList; import java.util.Collection; import java.util.List; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.TimeUnit; import com.redhat.thermostat.common.ActionListener; import com.redhat.thermostat.common.ActionNotifier; import com.redhat.thermostat.common.Filter; import com.redhat.thermostat.common.Pair; import com.redhat.thermostat.common.Timer; import com.redhat.thermostat.common.TimerFactory; import com.redhat.thermostat.storage.core.HostRef; import com.redhat.thermostat.storage.core.VmRef; import com.redhat.thermostat.storage.dao.VmInfoDAO; import com.redhat.thermostat.storage.monitor.HostMonitor; public class HostMonitorImpl implements HostMonitor { static final long DELAY = 200; private VmInfoDAO vmDao; private TimerFactory timerFactory; private Map<HostRef, Pair<Timer, ActionNotifier<HostMonitor.Action>>> listeners; public HostMonitorImpl(TimerFactory timerFactory, VmInfoDAO vmDao) { this.vmDao = vmDao; this.timerFactory = timerFactory; listeners = new ConcurrentHashMap<>(); } Map<HostRef, Pair<Timer, ActionNotifier<HostMonitor.Action>>> getListeners() { return listeners; } @Override public List<VmRef> getVirtualMachines(HostRef host, Filter<VmRef> matcher) { List<VmRef> vms = new ArrayList<>(); Collection<VmRef> _vms = vmDao.getVMs(host); for (VmRef vm : _vms) { if (matcher.matches(vm)) { vms.add(vm); } } return vms; } @Override public void addHostChangeListener(HostRef host, ActionListener<Action> listener) { Pair<Timer, ActionNotifier<HostMonitor.Action>> payload = listeners.get(host); if (payload == null) { ActionNotifier<Action> notifier = new ActionNotifier<>(this); Timer timer = timerFactory.createTimer(); timer.setTimeUnit(TimeUnit.MILLISECONDS); timer.setDelay(DELAY); timer.setSchedulingType(Timer.SchedulingType.FIXED_RATE); timer.setAction(new HostMonitorAction(notifier, vmDao, host)); timer.start(); payload = new Pair<>(timer, notifier); listeners.put(host, payload); } payload.getSecond().addActionListener(listener); } @Override public void removeHostChangeListener(HostRef host, ActionListener<Action> listener) { Pair<Timer, ActionNotifier<HostMonitor.Action>> payload = listeners.get(host); if (payload != null) { ActionNotifier<HostMonitor.Action> notifier = payload.getSecond(); notifier.removeActionListener(listener); if (notifier.listenersCount() == 0) { payload.getFirst().stop(); listeners.remove(host); } } } }