| /* |
| * Copyright (c) 2004, 2015, 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. |
| * |
| * 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. |
| */ |
| |
| /* |
| * @test |
| * @bug 4981829 |
| * @summary Test that the counter monitor, when running in difference mode, |
| * emits a notification every time the threshold is exceeded. |
| * @author Luis-Miguel Alventosa, Shanliang JIANG |
| * |
| * @run clean CounterMonitorTest |
| * @run build CounterMonitorTest |
| * @run main CounterMonitorTest |
| */ |
| |
| import javax.management.*; |
| import javax.management.monitor.*; |
| |
| public class CounterMonitorTest implements NotificationListener { |
| |
| // threshold number |
| private Number threshold = new Integer(2); |
| |
| // modulus number |
| private Number modulus = new Integer(7); |
| |
| // difference mode flag |
| private boolean differenceModeFlag = true; |
| |
| // notify flag |
| private boolean notifyFlag = true; |
| |
| // granularity period |
| private int granularityperiod = 10; |
| |
| // derived gauge |
| private volatile int derivedGauge = 2; |
| |
| // flag to notify that a message has been received |
| private volatile boolean messageReceived = false; |
| |
| private volatile Object observedValue = null; |
| |
| // MBean class |
| public class StdObservedObject implements StdObservedObjectMBean { |
| public Object getNbObjects() { |
| echo(">>> StdObservedObject.getNbObjects: " + count); |
| synchronized(CounterMonitorTest.class) { |
| observedValue = count; |
| CounterMonitorTest.class.notifyAll(); |
| } |
| return observedValue; |
| } |
| public void setNbObjects(Object n) { |
| echo(">>> StdObservedObject.setNbObjects: " + n); |
| count = n; |
| } |
| private volatile Object count= null; |
| } |
| |
| // MBean interface |
| public interface StdObservedObjectMBean { |
| public Object getNbObjects(); |
| public void setNbObjects(Object n); |
| } |
| |
| // Notification handler |
| public void handleNotification(Notification notification, |
| Object handback) { |
| MonitorNotification n = (MonitorNotification) notification; |
| echo("\tInside handleNotification..."); |
| String type = n.getType(); |
| try { |
| if (type.equals(MonitorNotification.THRESHOLD_VALUE_EXCEEDED)) { |
| echo("\t\t" + n.getObservedAttribute() + |
| " has reached or exceeded the threshold"); |
| echo("\t\tDerived Gauge = " + n.getDerivedGauge()); |
| |
| synchronized (this) { |
| messageReceived = true; |
| notifyAll(); |
| } |
| } else { |
| echo("\t\tSkipping notification of type: " + type); |
| } |
| } catch (Exception e) { |
| echo("\tError in handleNotification!"); |
| e.printStackTrace(System.out); |
| } |
| } |
| |
| /** |
| * Update the counter and check for notifications |
| */ |
| public void thresholdNotification() throws Exception { |
| |
| CounterMonitor counterMonitor = new CounterMonitor(); |
| try { |
| MBeanServer server = MBeanServerFactory.newMBeanServer(); |
| |
| String domain = server.getDefaultDomain(); |
| |
| // Create a new CounterMonitor MBean and add it to the MBeanServer. |
| // |
| echo(">>> CREATE a new CounterMonitor MBean"); |
| ObjectName counterMonitorName = new ObjectName( |
| domain + ":type=" + CounterMonitor.class.getName()); |
| server.registerMBean(counterMonitor, counterMonitorName); |
| |
| echo(">>> ADD a listener to the CounterMonitor"); |
| counterMonitor.addNotificationListener(this, null, null); |
| |
| // |
| // MANAGEMENT OF A STANDARD MBEAN |
| // |
| |
| echo(">>> CREATE a new StdObservedObject MBean"); |
| |
| ObjectName stdObsObjName = |
| new ObjectName(domain + ":type=StdObservedObject"); |
| StdObservedObject stdObsObj = new StdObservedObject(); |
| server.registerMBean(stdObsObj, stdObsObjName); |
| |
| echo(">>> SET the attributes of the CounterMonitor:"); |
| |
| counterMonitor.addObservedObject(stdObsObjName); |
| echo("\tATTRIBUTE \"ObservedObject\" = " + stdObsObjName); |
| |
| counterMonitor.setObservedAttribute("NbObjects"); |
| echo("\tATTRIBUTE \"ObservedAttribute\" = NbObjects"); |
| |
| counterMonitor.setNotify(notifyFlag); |
| echo("\tATTRIBUTE \"Notify\" = " + notifyFlag); |
| |
| counterMonitor.setInitThreshold(threshold); |
| echo("\tATTRIBUTE \"Threshold\" = " + threshold); |
| |
| counterMonitor.setGranularityPeriod(granularityperiod); |
| echo("\tATTRIBUTE \"GranularityPeriod\" = " + granularityperiod); |
| |
| counterMonitor.setModulus(modulus); |
| echo("\tATTRIBUTE \"Modulus\" = " + modulus); |
| |
| counterMonitor.setDifferenceMode(differenceModeFlag); |
| echo("\tATTRIBUTE \"DifferenceMode\" = " + differenceModeFlag); |
| |
| echo(">>> START the CounterMonitor"); |
| counterMonitor.start(); |
| |
| // Set initial value |
| // |
| Integer data = new Integer(0); |
| echo(">>> Set data = " + data.intValue()); |
| |
| Attribute attrib = new Attribute("NbObjects", data); |
| server.setAttribute(stdObsObjName, attrib); |
| |
| waitObservation(data); |
| |
| // Loop through the values |
| // |
| while (derivedGauge++ < 10) { |
| System.out.print(">>> Set data from " + data.intValue()); |
| data = new Integer(data.intValue() + derivedGauge); |
| echo(" to " + data.intValue()); |
| |
| attrib = new Attribute("NbObjects", data); |
| server.setAttribute(stdObsObjName, attrib); |
| waitObservation(data); |
| |
| echo("\tdoWait in Counter Monitor"); |
| doWait(); |
| |
| // Check if notification was received |
| // |
| if (messageReceived) { |
| echo("\tOKAY: Notification received"); |
| } else { |
| echo("\tError: notification missed or not emitted"); |
| throw new IllegalStateException("Notification lost"); |
| } |
| messageReceived = false; |
| } |
| } finally { |
| counterMonitor.stop(); |
| } |
| |
| echo(">>> Bye! Bye!"); |
| } |
| |
| /* |
| * Wait messageReceived to be true |
| */ |
| synchronized void doWait() { |
| while (!messageReceived) { |
| try { |
| wait(); |
| } catch (InterruptedException e) { |
| System.err.println("Got unexpected exception: " + e); |
| e.printStackTrace(); |
| break; |
| } |
| } |
| } |
| |
| private void waitObservation(Object value) { |
| synchronized (CounterMonitorTest.class) { |
| while (value != observedValue) { |
| try { |
| CounterMonitorTest.class.wait(); |
| } catch (InterruptedException e) { |
| System.err.println("Got unexpected exception: " + e); |
| e.printStackTrace(); |
| break; |
| } |
| } |
| } |
| } |
| |
| /* |
| * Print message |
| */ |
| void echo(String message) { |
| System.out.println(message); |
| } |
| |
| /* |
| * Standalone entry point. |
| * |
| * Run the test and report to stdout. |
| */ |
| public static void main (String args[]) throws Exception { |
| CounterMonitorTest test = new CounterMonitorTest(); |
| test.thresholdNotification(); |
| } |
| } |