Java Code Examples for javax.management.monitor.StringMonitorMBean#addObservedObject()
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javax.management.monitor.StringMonitorMBean#addObservedObject() .
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Example 1
Source File: StringMonitorDeadlockTest.java From dragonwell8_jdk with GNU General Public License v2.0 | 4 votes |
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 StringMonitor(), monitorName); final StringMonitorMBean monitorProxy = JMX.newMBeanProxy(mbs, monitorName, StringMonitorMBean.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.setStringToCompare("old"); monitorProxy.setGranularityPeriod(10L); // 10 ms monitorProxy.setNotifyDiffer(true); final int initGetCount = observedProxy.getGetCount(); monitorProxy.start(); int getCount = initGetCount; for (int i = 0; i < 500; i++) { // 500 * 10 = 5 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("new"); for (int i = 0; i < 500 && notifCount.get() == 0; i++) Thread.sleep(10); if (notifCount.get() == 0) throw new Exception("Test failed: presumable deadlock"); } }
Example 2
Source File: StringMonitorDeadlockTest.java From TencentKona-8 with GNU General Public License v2.0 | 4 votes |
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 StringMonitor(), monitorName); final StringMonitorMBean monitorProxy = JMX.newMBeanProxy(mbs, monitorName, StringMonitorMBean.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.setStringToCompare("old"); monitorProxy.setGranularityPeriod(10L); // 10 ms monitorProxy.setNotifyDiffer(true); final int initGetCount = observedProxy.getGetCount(); monitorProxy.start(); int getCount = initGetCount; for (int i = 0; i < 500; i++) { // 500 * 10 = 5 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("new"); for (int i = 0; i < 500 && notifCount.get() == 0; i++) Thread.sleep(10); if (notifCount.get() == 0) throw new Exception("Test failed: presumable deadlock"); } }
Example 3
Source File: StringMonitorDeadlockTest.java From jdk8u60 with GNU General Public License v2.0 | 4 votes |
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 StringMonitor(), monitorName); final StringMonitorMBean monitorProxy = JMX.newMBeanProxy(mbs, monitorName, StringMonitorMBean.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.setStringToCompare("old"); monitorProxy.setGranularityPeriod(10L); // 10 ms monitorProxy.setNotifyDiffer(true); monitorProxy.start(); final int initGetCount = observedProxy.getGetCount(); int getCount = initGetCount; for (int i = 0; i < 500; i++) { // 500 * 10 = 5 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("new"); for (int i = 0; i < 500 && notifCount.get() == 0; i++) Thread.sleep(10); if (notifCount.get() == 0) throw new Exception("Test failed: presumable deadlock"); } }
Example 4
Source File: StringMonitorDeadlockTest.java From openjdk-jdk8u with GNU General Public License v2.0 | 4 votes |
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 StringMonitor(), monitorName); final StringMonitorMBean monitorProxy = JMX.newMBeanProxy(mbs, monitorName, StringMonitorMBean.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.setStringToCompare("old"); monitorProxy.setGranularityPeriod(10L); // 10 ms monitorProxy.setNotifyDiffer(true); final int initGetCount = observedProxy.getGetCount(); monitorProxy.start(); int getCount = initGetCount; for (int i = 0; i < 500; i++) { // 500 * 10 = 5 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("new"); for (int i = 0; i < 500 && notifCount.get() == 0; i++) Thread.sleep(10); if (notifCount.get() == 0) throw new Exception("Test failed: presumable deadlock"); } }
Example 5
Source File: StringMonitorDeadlockTest.java From openjdk-jdk8u-backup with GNU General Public License v2.0 | 4 votes |
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 StringMonitor(), monitorName); final StringMonitorMBean monitorProxy = JMX.newMBeanProxy(mbs, monitorName, StringMonitorMBean.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.setStringToCompare("old"); monitorProxy.setGranularityPeriod(10L); // 10 ms monitorProxy.setNotifyDiffer(true); final int initGetCount = observedProxy.getGetCount(); monitorProxy.start(); int getCount = initGetCount; for (int i = 0; i < 500; i++) { // 500 * 10 = 5 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("new"); for (int i = 0; i < 500 && notifCount.get() == 0; i++) Thread.sleep(10); if (notifCount.get() == 0) throw new Exception("Test failed: presumable deadlock"); } }
Example 6
Source File: StringMonitorDeadlockTest.java From openjdk-jdk9 with GNU General Public License v2.0 | 4 votes |
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 StringMonitor(), monitorName); final StringMonitorMBean monitorProxy = JMX.newMBeanProxy(mbs, monitorName, StringMonitorMBean.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.setStringToCompare("old"); monitorProxy.setGranularityPeriod(10L); // 10 ms monitorProxy.setNotifyDiffer(true); final int initGetCount = observedProxy.getGetCount(); monitorProxy.start(); int getCount = initGetCount; for (int i = 0; i < 500; i++) { // 500 * 10 = 5 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("new"); for (int i = 0; i < 500 && notifCount.get() == 0; i++) Thread.sleep(10); if (notifCount.get() == 0) throw new Exception("Test failed: presumable deadlock"); } }
Example 7
Source File: StringMonitorDeadlockTest.java From jdk8u-jdk with GNU General Public License v2.0 | 4 votes |
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 StringMonitor(), monitorName); final StringMonitorMBean monitorProxy = JMX.newMBeanProxy(mbs, monitorName, StringMonitorMBean.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.setStringToCompare("old"); monitorProxy.setGranularityPeriod(10L); // 10 ms monitorProxy.setNotifyDiffer(true); final int initGetCount = observedProxy.getGetCount(); monitorProxy.start(); int getCount = initGetCount; for (int i = 0; i < 500; i++) { // 500 * 10 = 5 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("new"); for (int i = 0; i < 500 && notifCount.get() == 0; i++) Thread.sleep(10); if (notifCount.get() == 0) throw new Exception("Test failed: presumable deadlock"); } }
Example 8
Source File: StringMonitorDeadlockTest.java From hottub with GNU General Public License v2.0 | 4 votes |
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 StringMonitor(), monitorName); final StringMonitorMBean monitorProxy = JMX.newMBeanProxy(mbs, monitorName, StringMonitorMBean.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.setStringToCompare("old"); monitorProxy.setGranularityPeriod(10L); // 10 ms monitorProxy.setNotifyDiffer(true); monitorProxy.start(); final int initGetCount = observedProxy.getGetCount(); int getCount = initGetCount; for (int i = 0; i < 500; i++) { // 500 * 10 = 5 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("new"); for (int i = 0; i < 500 && notifCount.get() == 0; i++) Thread.sleep(10); if (notifCount.get() == 0) throw new Exception("Test failed: presumable deadlock"); } }
Example 9
Source File: StringMonitorDeadlockTest.java From openjdk-8-source with GNU General Public License v2.0 | 4 votes |
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 StringMonitor(), monitorName); final StringMonitorMBean monitorProxy = JMX.newMBeanProxy(mbs, monitorName, StringMonitorMBean.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.setStringToCompare("old"); monitorProxy.setGranularityPeriod(10L); // 10 ms monitorProxy.setNotifyDiffer(true); monitorProxy.start(); final int initGetCount = observedProxy.getGetCount(); int getCount = initGetCount; for (int i = 0; i < 500; i++) { // 500 * 10 = 5 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("new"); for (int i = 0; i < 500 && notifCount.get() == 0; i++) Thread.sleep(10); if (notifCount.get() == 0) throw new Exception("Test failed: presumable deadlock"); } }
Example 10
Source File: StringMonitorDeadlockTest.java From openjdk-8 with GNU General Public License v2.0 | 4 votes |
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 StringMonitor(), monitorName); final StringMonitorMBean monitorProxy = JMX.newMBeanProxy(mbs, monitorName, StringMonitorMBean.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.setStringToCompare("old"); monitorProxy.setGranularityPeriod(10L); // 10 ms monitorProxy.setNotifyDiffer(true); monitorProxy.start(); final int initGetCount = observedProxy.getGetCount(); int getCount = initGetCount; for (int i = 0; i < 500; i++) { // 500 * 10 = 5 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("new"); for (int i = 0; i < 500 && notifCount.get() == 0; i++) Thread.sleep(10); if (notifCount.get() == 0) throw new Exception("Test failed: presumable deadlock"); } }
Example 11
Source File: StringMonitorDeadlockTest.java From jdk8u_jdk with GNU General Public License v2.0 | 4 votes |
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 StringMonitor(), monitorName); final StringMonitorMBean monitorProxy = JMX.newMBeanProxy(mbs, monitorName, StringMonitorMBean.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.setStringToCompare("old"); monitorProxy.setGranularityPeriod(10L); // 10 ms monitorProxy.setNotifyDiffer(true); final int initGetCount = observedProxy.getGetCount(); monitorProxy.start(); int getCount = initGetCount; for (int i = 0; i < 500; i++) { // 500 * 10 = 5 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("new"); for (int i = 0; i < 500 && notifCount.get() == 0; i++) Thread.sleep(10); if (notifCount.get() == 0) throw new Exception("Test failed: presumable deadlock"); } }
Example 12
Source File: StringMonitorDeadlockTest.java From jdk8u-jdk with GNU General Public License v2.0 | 4 votes |
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 StringMonitor(), monitorName); final StringMonitorMBean monitorProxy = JMX.newMBeanProxy(mbs, monitorName, StringMonitorMBean.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.setStringToCompare("old"); monitorProxy.setGranularityPeriod(10L); // 10 ms monitorProxy.setNotifyDiffer(true); monitorProxy.start(); final int initGetCount = observedProxy.getGetCount(); int getCount = initGetCount; for (int i = 0; i < 500; i++) { // 500 * 10 = 5 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("new"); for (int i = 0; i < 500 && notifCount.get() == 0; i++) Thread.sleep(10); if (notifCount.get() == 0) throw new Exception("Test failed: presumable deadlock"); } }
Example 13
Source File: StringMonitorDeadlockTest.java From jdk8u-dev-jdk with GNU General Public License v2.0 | 4 votes |
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 StringMonitor(), monitorName); final StringMonitorMBean monitorProxy = JMX.newMBeanProxy(mbs, monitorName, StringMonitorMBean.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.setStringToCompare("old"); monitorProxy.setGranularityPeriod(10L); // 10 ms monitorProxy.setNotifyDiffer(true); monitorProxy.start(); final int initGetCount = observedProxy.getGetCount(); int getCount = initGetCount; for (int i = 0; i < 500; i++) { // 500 * 10 = 5 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("new"); for (int i = 0; i < 500 && notifCount.get() == 0; i++) Thread.sleep(10); if (notifCount.get() == 0) throw new Exception("Test failed: presumable deadlock"); } }