Mercurial > hg > release > thermostat-0.5
view vm-memory/agent/src/main/java/com/redhat/thermostat/vm/memory/agent/internal/VmMemoryHostListener.java @ 894:0ba74f790a8a
Create VM Memory agent and common bundles
This commit extracts VM Memory data collection from SystemBackend and
related classes into a vm-memory-agent bundle. It also moves the
VmMemoryStatDAO from common-core into a vm-memory-common bundle that
registers the DAO once Storage is available. This also removes the DAO
from DAOFactory.
This also temporarily adds the vm-memory-common bundle as a dependency
to client-cli until my later dynamic vm-stat patch.
Reviewed-by: omajid
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2013-January/004995.html
author | Elliott Baron <ebaron@redhat.com> |
---|---|
date | Mon, 07 Jan 2013 15:50:03 -0500 |
parents | system-backend/src/main/java/com/redhat/thermostat/backend/system/JvmStatHostListener.java@9e6bcfc40ea1 |
children |
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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.memory.agent.internal; import java.net.URISyntaxException; import java.util.HashMap; import java.util.Map; import java.util.Set; import java.util.concurrent.ConcurrentHashMap; import java.util.logging.Level; import java.util.logging.Logger; import sun.jvmstat.monitor.MonitorException; import sun.jvmstat.monitor.MonitoredHost; import sun.jvmstat.monitor.MonitoredVm; import sun.jvmstat.monitor.VmIdentifier; import sun.jvmstat.monitor.event.HostEvent; import sun.jvmstat.monitor.event.HostListener; import sun.jvmstat.monitor.event.VmListener; import sun.jvmstat.monitor.event.VmStatusChangeEvent; import com.redhat.thermostat.common.utils.LoggingUtils; import com.redhat.thermostat.vm.memory.common.VmMemoryStatDAO; public class VmMemoryHostListener implements HostListener { private static final Logger logger = LoggingUtils.getLogger(VmMemoryHostListener.class); private boolean attachNew; private final VmMemoryStatDAO vmMemoryStatDAO; private Map<Integer, MonitoredVm> monitoredVms = new HashMap<>(); private Map<MonitoredVm, VmMemoryVmListener> registeredListeners = new ConcurrentHashMap<>(); VmMemoryHostListener(VmMemoryStatDAO vmMemoryStatDAO, boolean attachNew) { this.vmMemoryStatDAO = vmMemoryStatDAO; this.attachNew = attachNew; } void removeAllListeners() { for (MonitoredVm vm : monitoredVms.values()) { VmListener listener = registeredListeners.get(vm); try { if (listener != null) { vm.removeVmListener(listener); } } catch (MonitorException e) { logger.log(Level.WARNING, "can't remove vm listener", e); } } } @Override public void disconnected(HostEvent event) { logger.warning("Disconnected from host"); } @SuppressWarnings("unchecked") // Unchecked casts to (Set<Integer>). @Override public void vmStatusChanged(VmStatusChangeEvent event) { MonitoredHost host = event.getMonitoredHost(); for (Integer newVm : (Set<Integer>) event.getStarted()) { try { logger.fine("New vm: " + newVm); sendNewVM(newVm, host); } catch (MonitorException e) { logger.log(Level.WARNING, "error getting info for new vm" + newVm, e); } catch (URISyntaxException e) { logger.log(Level.WARNING, "error getting info for new vm" + newVm, e); } } for (Integer stoppedVm : (Set<Integer>) event.getTerminated()) { try { logger.fine("stopped vm: " + stoppedVm); sendStoppedVM(stoppedVm, host); } catch (URISyntaxException e) { logger.log(Level.WARNING, "error getting info for stopped vm" + stoppedVm, e); } catch (MonitorException e) { logger.log(Level.WARNING, "error getting info for stopped vm" + stoppedVm, e); } } } private void sendNewVM(Integer vmId, MonitoredHost host) throws MonitorException, URISyntaxException { MonitoredVm vm = host.getMonitoredVm(host.getHostIdentifier().resolve( new VmIdentifier(vmId.toString()))); if (vm != null) { if (attachNew) { VmMemoryVmListener listener = new VmMemoryVmListener(vmMemoryStatDAO, vmId); vm.addVmListener(listener); registeredListeners.put(vm, listener); logger.finer("Attached VmListener for VM: " + vmId); } else { logger.log(Level.FINE, "skipping new vm " + vmId); } monitoredVms.put(vmId, vm); } } private void sendStoppedVM(Integer vmId, MonitoredHost host) throws URISyntaxException, MonitorException { VmIdentifier resolvedVmID = host.getHostIdentifier().resolve(new VmIdentifier(vmId.toString())); if (resolvedVmID != null) { MonitoredVm vm = monitoredVms.remove(vmId); VmMemoryVmListener listener = registeredListeners.remove(vm); try { if (listener != null) { vm.removeVmListener(listener); } } catch (MonitorException e) { logger.log(Level.WARNING, "can't remove vm listener", e); } vm.detach(); } } /* * For testing purposes only. */ Map<Integer, MonitoredVm> getMonitoredVms() { return monitoredVms; } /* * For testing purposes only. */ Map<MonitoredVm, VmMemoryVmListener> getRegisteredListeners() { return registeredListeners; } }