Mercurial > hg > release > thermostat-0.5
view vm-classstat/agent/src/main/java/com/redhat/thermostat/vm/classstat/agent/internal/VmClassStatBackend.java @ 929:ccac9bcabaa0
Update copyright year of source code
review-thread: http://icedtea.classpath.org/pipermail/thermostat/2013-January/005295.html
reviewed-by: vanaltj
author | Mario Torre <neugens.limasoftware@gmail.com> |
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date | Wed, 23 Jan 2013 16:49:27 +0100 |
parents | 259c60624174 |
children |
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/* * Copyright 2012, 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.classstat.agent.internal; import java.net.URISyntaxException; import java.util.HashMap; import java.util.Map; 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 sun.jvmstat.monitor.MonitoredVm; import sun.jvmstat.monitor.VmIdentifier; import sun.jvmstat.monitor.event.VmListener; import com.redhat.thermostat.agent.VmStatusListener; import com.redhat.thermostat.agent.VmStatusListenerRegistrar; import com.redhat.thermostat.backend.Backend; import com.redhat.thermostat.backend.BackendID; import com.redhat.thermostat.backend.BackendsProperties; import com.redhat.thermostat.common.Pair; import com.redhat.thermostat.common.Version; import com.redhat.thermostat.common.utils.LoggingUtils; import com.redhat.thermostat.vm.classstat.common.VmClassStatDAO; public class VmClassStatBackend extends Backend implements VmStatusListener { private static final Logger LOGGER = LoggingUtils.getLogger(VmClassStatBackend.class); private final VmClassStatDAO vmClassStats; private final VmStatusListenerRegistrar registrar; private final Map<Integer, Pair<MonitoredVm, ? extends VmListener>> pidToVmAndListener = new HashMap<>(); private MonitoredHost host; private boolean started; public VmClassStatBackend(VmClassStatDAO vmClassStatDAO, Version version, VmStatusListenerRegistrar registrar) { super(new BackendID("VM Classes Backend", VmClassStatBackend.class.getName())); this.vmClassStats = vmClassStatDAO; this.registrar = registrar; setConfigurationValue(BackendsProperties.VENDOR.name(), "Red Hat, Inc."); setConfigurationValue(BackendsProperties.DESCRIPTION.name(), "Gathers class loading statistics about a JVM"); setConfigurationValue(BackendsProperties.VERSION.name(), version.getVersionNumber()); try { HostIdentifier hostId = new HostIdentifier((String) null); host = MonitoredHost.getMonitoredHost(hostId); } 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); } } /* * Methods from Backend */ @Override public boolean activate() { if (!started && host != null) { registrar.register(this); started = true; } return started; } @Override public boolean deactivate() { if (started) { registrar.unregister(this); started = false; } return !started; } @Override public boolean isActive() { return started; } @Override public String getConfigurationValue(String key) { return null; } @Override public boolean attachToNewProcessByDefault() { return true; } @Override public int getOrderValue() { return ORDER_MEMORY_GROUP + 30; } /* * Methods from VmStatusListener */ @Override public void vmStatusChanged(Status newStatus, int pid) { switch (newStatus) { case VM_STARTED: /* fall-through */ case VM_ACTIVE: vmStarted(pid); break; case VM_STOPPED: vmStopped(pid); break; } } private void vmStarted(int pid) { if (attachToNewProcessByDefault()) { try { MonitoredVm vm = host.getMonitoredVm(host.getHostIdentifier().resolve(new VmIdentifier(String.valueOf(pid)))); VmClassStatVmListener listener = new VmClassStatVmListener(vmClassStats, pid); vm.addVmListener(listener); pidToVmAndListener.put(pid, new Pair<>(vm, listener)); LOGGER.finer("Attached VmListener for VM: " + pid); } catch (MonitorException | URISyntaxException e) { LOGGER.log(Level.WARNING, "Could not attach to new vm " + pid, e); } } else { LOGGER.log(Level.FINE, "skipping new vm " + pid); } } private void vmStopped(Integer pid) { Pair<MonitoredVm, ? extends VmListener> data = pidToVmAndListener.remove(pid); // if there is no data, we must never have attached to the vm. Nothing to do. if (data == null) { return; } MonitoredVm vm = data.getFirst(); VmListener listener = data.getSecond(); try { vm.removeVmListener(listener); } catch (MonitorException e) { LOGGER.log(Level.WARNING, "can't remove vm listener", e); } vm.detach(); } /* * For testing purposes only. */ void setHost(MonitoredHost host) { this.host = host; } /* * For testing purposes only. */ Map<Integer, Pair<MonitoredVm, ? extends VmListener>> getPidToDataMap() { return pidToVmAndListener; } }