本文整理汇总了Java中javax.management.monitor.GaugeMonitorMBean.setNotifyLow方法的典型用法代码示例。如果您正苦于以下问题：Java GaugeMonitorMBean.setNotifyLow方法的具体用法？Java GaugeMonitorMBean.setNotifyLow怎么用？Java GaugeMonitorMBean.setNotifyLow使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类javax.management.monitor.GaugeMonitorMBean的用法示例。
在下文中一共展示了GaugeMonitorMBean.setNotifyLow方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: run
import javax.management.monitor.GaugeMonitorMBean; //导入方法依赖的package包/类
void run() throws Exception {
final MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
final ObjectName observedName = new ObjectName("a:b=c");
final ObjectName monitorName = new ObjectName("a:type=Monitor");
mbs.registerMBean(new GaugeMonitor(), monitorName);
final GaugeMonitorMBean monitorProxy =
JMX.newMBeanProxy(mbs, monitorName, GaugeMonitorMBean.class);
final TestMBean observedProxy =
JMX.newMBeanProxy(mbs, observedName, TestMBean.class);
final Runnable sensitiveThing = new Runnable() {
public void run() {
doSensitiveThing(monitorProxy, observedName);
}
};
final Runnable nothing = new Runnable() {
public void run() {}
};
final Runnable withinGetAttribute =
(when == When.IN_GET_ATTRIBUTE) ? sensitiveThing : nothing;
mbs.registerMBean(new Test(withinGetAttribute), observedName);
monitorProxy.addObservedObject(observedName);
monitorProxy.setObservedAttribute("Thing");
monitorProxy.setThresholds(105, 100);
monitorProxy.setGranularityPeriod(10L); // 10 ms
monitorProxy.setNotifyHigh(true);
monitorProxy.setNotifyLow(true);
monitorProxy.start();
final int initGetCount = observedProxy.getGetCount();
int getCount = initGetCount;
for (int i = 0; i < 2000; i++) { // 2000 * 10 = 20 seconds
getCount = observedProxy.getGetCount();
if (getCount != initGetCount)
break;
Thread.sleep(10);
}
if (getCount <= initGetCount)
throw new Exception("Test failed: presumable deadlock");
// This won't show up as a deadlock in CTRL-\ or in
// ThreadMXBean.findDeadlockedThreads(), because they don't
// see that thread A is waiting for thread B (B.join()), and
// thread B is waiting for a lock held by thread A
// Now we know the monitor has observed the initial value,
// so if we want to test notify behaviour we can trigger by
// exceeding the threshold.
if (when == When.IN_NOTIFY) {
final AtomicInteger notifCount = new AtomicInteger();
final NotificationListener listener = new NotificationListener() {
public void handleNotification(Notification n, Object h) {
Thread t = new Thread(sensitiveThing);
t.start();
try {
t.join();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
notifCount.incrementAndGet();
}
};
mbs.addNotificationListener(monitorName, listener, null, null);
observedProxy.setThing(1000);
for (int i = 0; i < 2000 && notifCount.get() == 0; i++)
Thread.sleep(10);
if (notifCount.get() == 0)
throw new Exception("Test failed: presumable deadlock");
}
}