227 lines
8.4 KiB
Java
227 lines
8.4 KiB
Java
/*
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* Copyright (c) 2004, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4984057
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* @key randomness
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* @summary Test that monitors can sample a large number of attributes
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* @author Eamonn McManus
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*
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* @run clean MultiMonitorTest
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* @run build MultiMonitorTest
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* @run main MultiMonitorTest
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*/
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import java.util.*;
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import javax.management.*;
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import javax.management.monitor.*;
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/* We create N MBeans and three monitors, one for each different
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monitor type. Each monitor monitors a single attribute in each of
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the N MBeans. We arrange for the trigger condition to be
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satisfied, so the listener we register on each monitor should get N
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notifications. */
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public class MultiMonitorTest {
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static final int N = 100;
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static final ObjectName[] mbeanNames = new ObjectName[N];
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static final Monitored[] monitored = new Monitored[N];
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static final int COUNTER_THRESHOLD = 1000;
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static final int OVER_COUNTER_THRESHOLD = 2000;
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static final double GAUGE_THRESHOLD = 1000.0;
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static final double OVER_GAUGE_THRESHOLD = 2000.0;
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static final String STRING_TO_COMPARE = "chou";
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static final String DIFFERENT_STRING = "chevre";
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public static void main(String[] args) throws Exception {
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System.out.println("Test that monitors can sample a large " +
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"number of attributes");
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final MBeanServer mbs = MBeanServerFactory.createMBeanServer();
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for (int i = 0; i < N; i++) {
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mbeanNames[i] = new ObjectName(":type=Monitored,instance=" + i);
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monitored[i] = new Monitored();
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mbs.registerMBean(monitored[i], mbeanNames[i]);
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}
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final ObjectName counterMonitor =
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new ObjectName(":type=CounterMonitor");
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final ObjectName gaugeMonitor =
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new ObjectName(":type=GaugeMonitor");
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final ObjectName stringMonitor =
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new ObjectName(":type=StringMonitor");
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final ObjectName[] monitorNames =
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new ObjectName[] {counterMonitor, gaugeMonitor, stringMonitor};
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final String[] attrNames =
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new String[] {"CounterValue", "GaugeValue", "StringValue"};
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mbs.createMBean(CounterMonitor.class.getName(), counterMonitor);
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mbs.createMBean(GaugeMonitor.class.getName(), gaugeMonitor);
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mbs.createMBean(StringMonitor.class.getName(), stringMonitor);
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final CounterMonitorMBean counterProxy = (CounterMonitorMBean)
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MBeanServerInvocationHandler
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.newProxyInstance(mbs, counterMonitor, CounterMonitorMBean.class,
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false);
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final GaugeMonitorMBean gaugeProxy = (GaugeMonitorMBean)
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MBeanServerInvocationHandler
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.newProxyInstance(mbs, gaugeMonitor, GaugeMonitorMBean.class,
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false);
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final StringMonitorMBean stringProxy = (StringMonitorMBean)
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MBeanServerInvocationHandler
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.newProxyInstance(mbs, stringMonitor, StringMonitorMBean.class,
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false);
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final MonitorMBean[] proxies = new MonitorMBean[] {
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counterProxy, gaugeProxy, stringProxy,
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};
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for (int i = 0; i < 3; i++) {
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proxies[i].setGranularityPeriod(1);
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proxies[i].setObservedAttribute(attrNames[i]);
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for (int j = 0; j < N; j++)
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proxies[i].addObservedObject(mbeanNames[j]);
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}
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final CountListener[] listeners = new CountListener[] {
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new CountListener(), new CountListener(), new CountListener()
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};
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for (int i = 0; i < 3; i++) {
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mbs.addNotificationListener(monitorNames[i], listeners[i],
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null, null);
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}
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counterProxy.setInitThreshold(new Integer(COUNTER_THRESHOLD));
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counterProxy.setNotify(true);
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gaugeProxy.setThresholds(new Double(GAUGE_THRESHOLD), new Double(0.0));
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gaugeProxy.setNotifyHigh(true);
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stringProxy.setStringToCompare(STRING_TO_COMPARE);
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stringProxy.setNotifyDiffer(true);
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// A couple of granularity periods to detect bad behaviour
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Thread.sleep(2);
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System.out.println("Checking for all listeners to be 0");
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if (!listenersAreAll(0, listeners)) {
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System.out.println("TEST FAILED: listeners not all 0");
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System.exit(1);
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}
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for (int i = 0; i < 3; i++)
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proxies[i].start();
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System.out.println("Waiting for listeners to all : " + N);
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int iterations = 0;
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while (!listenersAreAll(N, listeners)) {
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Thread.sleep(500);
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if (++iterations == 10) {
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for (int i = 0; i < listeners.length; i++) {
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System.out.print(" " + listeners[i].getCount());
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}
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System.out.println();
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iterations = 0;
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}
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}
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for (int i = 0; i < 3; i++) {
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proxies[i].stop();
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for (int j = 0; j < N; j++)
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proxies[i].removeObservedObject(mbeanNames[j]);
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ObjectName[] observed = proxies[i].getObservedObjects();
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if (observed.length != 0) {
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System.out.println("TEST FAILED: not all observed objects " +
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"removed: " + Arrays.asList(observed));
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System.exit(1);
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}
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}
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System.out.println("Test passed");
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}
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public static interface MonitoredMBean {
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public int getCounterValue();
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public double getGaugeValue();
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public String getStringValue();
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}
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public static class Monitored implements MonitoredMBean {
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/* We give a small random number of normal readings (possibly
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zero) before giving a reading that provokes a
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notification. */
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private int okCounter = randomInt(5);
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private int okGauge = randomInt(5);
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private int okString = randomInt(5);
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public synchronized int getCounterValue() {
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if (--okCounter >= 0)
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return 0;
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else
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return OVER_COUNTER_THRESHOLD;
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}
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public synchronized double getGaugeValue() {
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if (--okGauge >= 0)
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return 0.0;
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else
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return OVER_GAUGE_THRESHOLD;
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}
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public synchronized String getStringValue() {
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if (--okString >= 0)
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return STRING_TO_COMPARE;
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else
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return DIFFERENT_STRING;
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}
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}
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public static class CountListener implements NotificationListener {
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private int count;
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public synchronized void handleNotification(Notification n, Object h) {
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if (!(n instanceof MonitorNotification)) {
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System.out.println("TEST FAILED: bad notif: " +
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n.getClass().getName());
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System.exit(1);
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}
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if (n.getType().indexOf("error") >= 0) {
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System.out.println("TEST FAILED: error notif: " + n.getType());
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System.exit(1);
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}
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count++;
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}
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public synchronized int getCount() {
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return count;
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}
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}
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private static boolean listenersAreAll(int n, CountListener[] listeners) {
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for (int i = 0; i < listeners.length; i++) {
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if (listeners[i].getCount() != n)
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return false;
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}
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return true;
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}
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private static final Random random = new Random();
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static synchronized int randomInt(int n) {
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return random.nextInt(n);
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}
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}
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