jdk/src/jdk.jvmstat.rmi/share/classes/sun/jvmstat/perfdata/monitor/protocol/rmi/RemoteMonitoredVm.java
--- a/jdk/src/jdk.jvmstat.rmi/share/classes/sun/jvmstat/perfdata/monitor/protocol/rmi/RemoteMonitoredVm.java Wed Apr 27 20:18:49 2016 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,300 +0,0 @@
-/*
- * Copyright (c) 2004, 2014, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code 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
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package sun.jvmstat.perfdata.monitor.protocol.rmi;
-
-import sun.jvmstat.monitor.*;
-import sun.jvmstat.monitor.event.*;
-import sun.jvmstat.monitor.remote.*;
-import sun.jvmstat.perfdata.monitor.*;
-import java.lang.reflect.*;
-import java.util.*;
-import java.io.*;
-import java.nio.ByteBuffer;
-import java.rmi.*;
-
-/**
- * Concrete implementation of the AbstractMonitoredVm class for the
- * <em>rmi:</em> protocol for the HotSpot PerfData monitoring implementation.
- * <p>
- * This class provides the ability to acquire to the instrumentation buffer
- * of a live, remote target Java Virtual Machine through an RMI server.
- *
- * @author Brian Doherty
- * @since 1.5
- */
-public class RemoteMonitoredVm extends AbstractMonitoredVm {
-
- private ArrayList<VmListener> listeners;
- private NotifierTask notifierTask;
- private SamplerTask samplerTask;
- private Timer timer;
-
- private RemoteVm rvm;
- private ByteBuffer updateBuffer;
-
- /**
- * Create a RemoteMonitoredVm instance.
- *
- * @param rvm the proxy to the remote MonitoredVm instance.
- * @param vmid the vm identifier specifying the remot target JVM
- * @param timer the timer used to run polling tasks
- * @param interval the sampling interval
- */
- public RemoteMonitoredVm(RemoteVm rvm, VmIdentifier vmid,
- Timer timer, int interval)
- throws MonitorException {
- super(vmid, interval);
- this.rvm = rvm;
- pdb = new PerfDataBuffer(rvm, vmid.getLocalVmId());
- this.listeners = new ArrayList<VmListener>();
- this.timer = timer;
- }
-
- /**
- * Method to attach to the remote MonitoredVm.
- */
- public void attach() throws MonitorException {
- updateBuffer = pdb.getByteBuffer().duplicate();
-
- // if continuous sampling is requested, register with the sampler thread
- if (interval > 0) {
- samplerTask = new SamplerTask();
- timer.schedule(samplerTask, 0, interval);
- }
- }
-
- /**
- * {@inheritDoc}
- */
- public void detach() {
- try {
- if (interval > 0) {
- if (samplerTask != null) {
- samplerTask.cancel();
- samplerTask = null;
- }
- if (notifierTask != null) {
- notifierTask.cancel();
- notifierTask = null;
- }
- sample();
- }
- } catch (RemoteException e) {
- // XXX: - use logging api? throw an exception instead?
- System.err.println("Could not read data for remote JVM " + vmid);
- e.printStackTrace();
-
- } finally {
- super.detach();
- }
- }
-
- /**
- * Get a copy of the remote instrumentation buffer.
- *<p>
- * The data in the remote instrumentation buffer is copied into
- * a local byte buffer.
- *
- * @throws RemoteException Thrown on any communications errors with
- * the remote system.
- */
- public void sample() throws RemoteException {
- assert updateBuffer != null;
- ((PerfDataBuffer)pdb).sample(updateBuffer);
- }
-
- /**
- * Get the proxy to the remote MonitoredVm.
- *
- * @return RemoteVm - the proxy to the remote MonitoredVm.
- */
- public RemoteVm getRemoteVm() {
- return rvm;
- }
-
- /**
- * {@inheritDoc}
- */
- public void addVmListener(VmListener l) {
- synchronized(listeners) {
- listeners.add(l);
- if (notifierTask == null) {
- notifierTask = new NotifierTask();
- timer.schedule(notifierTask, 0, interval);
- }
- }
- }
-
- /**
- * {@inheritDoc}
- */
- public void removeVmListener(VmListener l) {
- synchronized(listeners) {
- listeners.remove(l);
- if (listeners.isEmpty() && (notifierTask != null)) {
- notifierTask.cancel();
- notifierTask = null;
- }
- }
- }
-
- /**
- * {@inheritDoc}
- */
- public void setInterval(int newInterval) {
- synchronized(listeners) {
- if (newInterval == interval) {
- return;
- }
-
- int oldInterval = interval;
- super.setInterval(newInterval);
-
- if (samplerTask != null) {
- samplerTask.cancel();
- SamplerTask oldSamplerTask = samplerTask;
- samplerTask = new SamplerTask();
- CountedTimerTaskUtils.reschedule(timer, oldSamplerTask,
- samplerTask, oldInterval,
- newInterval);
- }
- if (notifierTask != null) {
- notifierTask.cancel();
- NotifierTask oldNotifierTask = notifierTask;
- notifierTask = new NotifierTask();
- CountedTimerTaskUtils.reschedule(timer, oldNotifierTask,
- notifierTask, oldInterval,
- newInterval);
- }
- }
- }
-
- /**
- * Fire MonitoredVmStructureChanged events.
- *
- * @param inserted List of Monitor objects inserted.
- * @param removed List of Monitor objects removed.
- */
- @SuppressWarnings("unchecked") // Cast of result of clone
- void fireMonitorStatusChangedEvents(List<Monitor> inserted, List<Monitor> removed) {
- ArrayList<VmListener> registered = null;
- MonitorStatusChangeEvent ev = null;
-
- synchronized(listeners) {
- registered = (ArrayList)listeners.clone();
- }
-
- for (Iterator<VmListener> i = registered.iterator(); i.hasNext(); /* empty */) {
- VmListener l = i.next();
- if (ev == null) {
- ev = new MonitorStatusChangeEvent(this, inserted, removed);
- }
- l.monitorStatusChanged(ev);
- }
- }
-
- /**
- * Fire MonitoredVmStructureChanged events.
- */
- @SuppressWarnings("unchecked") // Cast of result of clone
- void fireMonitorsUpdatedEvents() {
- ArrayList<VmListener> registered = null;
- VmEvent ev = null;
-
- synchronized(listeners) {
- registered = (ArrayList)listeners.clone();
- }
-
- for (Iterator<VmListener> i = registered.iterator(); i.hasNext(); /* empty */) {
- VmListener l = i.next();
- if (ev == null) {
- ev = new VmEvent(this);
- }
- l.monitorsUpdated(ev);
- }
- }
-
- /*
- * Timer Tasks. There are two separate timer tasks here. The SamplerTask
- * is active whenever we are attached to the remote JVM with a periodic
- * sampling interval > 0. The NotifierTask is only active if a VmListener
- * has registered with this RemoteMonitoredVm instance. Also, in the future
- * we may want to run these tasks at different intervals. Currently,
- * they run at the same interval and some significant work may
- * need to be done to complete the separation of these two intervals.
- */
-
- /**
- * Class to periodically check the state of the defined monitors
- * for the remote MonitoredVm instance and to notify listeners of
- * any detected changes.
- */
- private class NotifierTask extends CountedTimerTask {
- public void run() {
- super.run();
- try {
- MonitorStatus status = getMonitorStatus();
-
- List<Monitor> inserted = status.getInserted();
- List<Monitor> removed = status.getRemoved();
-
- if (!inserted.isEmpty() || !removed.isEmpty()) {
- fireMonitorStatusChangedEvents(inserted, removed);
- }
- } catch (MonitorException e) {
- // XXX: use logging api? fire disconnect events? mark errored?
- // fireDisconnectedEvents();
- System.err.println("Exception updating monitors for "
- + getVmIdentifier());
- e.printStackTrace();
- // XXX: should we cancle the notifierTask here?
- // this.cancel();
- }
- }
- }
-
- /**
- * Class to periodically sample the remote instrumentation byte buffer
- * and refresh the local copy. Registered listeners are notified of
- * the completion of a sampling event.
- */
- private class SamplerTask extends CountedTimerTask {
- public void run() {
- super.run();
- try {
- sample();
- fireMonitorsUpdatedEvents();
-
- } catch (RemoteException e) {
- // XXX: use logging api, mark vm as errored.
- System.err.println("Exception taking sample for "
- + getVmIdentifier());
- e.printStackTrace();
- this.cancel();
- }
- }
- }
-}