Examples with MemoryMXBean java.lang.management.MemoryMXBean used on opensource projects

Example 56 with MemoryMXBean

use of java.lang.management.MemoryMXBean in project closure-compiler by google.

the class JvmMetrics method writeMemoryMetrics.

private static void writeMemoryMetrics(PrintStream out, boolean verbose, boolean pretty) {
    if (pretty) {
        out.println("\nMemory usage");
    }
    // only show overall stats in verbose mode
    if (verbose) {
        MemoryMXBean overallMemBean = ManagementFactory.getMemoryMXBean();
        MemoryUsage usage = overallMemBean.getHeapMemoryUsage();
        writeOverallMemoryUsage(out, usage, "Heap", pretty);
        usage = overallMemBean.getNonHeapMemoryUsage();
        writeOverallMemoryUsage(out, usage, "Non-heap", pretty);
    }
    if (verbose) {
        List<MemoryPoolMXBean> mpBeans = ManagementFactory.getMemoryPoolMXBeans();
        for (MemoryPoolMXBean mpBean : mpBeans) {
            MemoryUsage currentUsage = mpBean.getUsage();
            MemoryUsage peakUsage = mpBean.getPeakUsage();
            if (pretty) {
                out.println("\tPool " + mpBean.getName());
                writePoolMemoryUsage(out, currentUsage, peakUsage, null, true);
            } else {
                writePoolMemoryUsage(out, currentUsage, peakUsage, "mem-pool-" + normalizeName(mpBean.getName()), false);
            }
        }
    } else {
        long available = 0;
        long current = 0;
        long peak = 0;
        List<MemoryPoolMXBean> mpBeans = ManagementFactory.getMemoryPoolMXBeans();
        for (MemoryPoolMXBean mpBean : mpBeans) {
            MemoryUsage currentUsage = mpBean.getUsage();
            available += currentUsage.getMax();
            current += currentUsage.getUsed();
            MemoryUsage peakUsage = mpBean.getPeakUsage();
            peak += peakUsage.getUsed();
        }
        MemoryUsage summaryUsage = new MemoryUsage(0, current, current, available);
        MemoryUsage summaryPeakUsage = new MemoryUsage(0, peak, peak, peak);
        if (pretty) {
            out.format("\tAggregate of %d memory pools\n", mpBeans.size());
            writePoolMemoryUsage(out, summaryUsage, summaryPeakUsage, null, true);
        } else {
            writePoolMemoryUsage(out, summaryUsage, summaryPeakUsage, "mem", false);
        }
    }
}

Example 57 with MemoryMXBean

use of java.lang.management.MemoryMXBean in project openj9 by eclipse.

the class TestManagementFactory method testExtMemoryMXBeanProxyNotificationEmitterRemoveListeners.

/**
 * For IBM extensions on the MemoryMXBean
 */
@Test
public void testExtMemoryMXBeanProxyNotificationEmitterRemoveListeners() {
    try {
        com.ibm.lang.management.MemoryMXBean proxy = ManagementFactory.newPlatformMXBeanProxy(ManagementFactory.getPlatformMBeanServer(), "java.lang:type=Memory", com.ibm.lang.management.MemoryMXBean.class);
        MemoryMXBean stdProxy = proxy;
        AssertJUnit.assertNotNull(stdProxy);
        AssertJUnit.assertTrue(proxy instanceof NotificationEmitter);
        NotificationEmitter proxyEmitter = (NotificationEmitter) proxy;
        MyTestListener listener = new MyTestListener();
        proxyEmitter.addNotificationListener(listener, null, null);
        // Fire off a notification and ensure that the listener receives it.
        MemoryUsage mu = new MemoryUsage(1, 2, 3, 4);
        MemoryNotificationInfo info = new MemoryNotificationInfo("Marcel", mu, 42);
        CompositeData cd = TestUtil.toCompositeData(info);
        Notification notification = new Notification(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED, new ObjectName(ManagementFactory.MEMORY_MXBEAN_NAME), 42);
        notification.setUserData(cd);
        ((MemoryMXBeanImpl) ManagementFactory.getMemoryMXBean()).sendNotification(notification);
        AssertJUnit.assertEquals(1, listener.getNotificationsReceivedCount());
        // Verify that the handback is as expected.
        AssertJUnit.assertNull(listener.getHandback());
        // Verify the user data of the notification.
        Notification n = listener.getNotification();
        AssertJUnit.assertNotNull(n);
        verifyMemoryNotificationUserData(n.getUserData());
        // Remove the listener
        proxyEmitter.removeNotificationListener(listener);
        // Fire off a notification and ensure that the listener does
        // *not* receive it.
        listener.resetNotificationsReceivedCount();
        notification = new Notification(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED, new ObjectName(ManagementFactory.MEMORY_MXBEAN_NAME), 43);
        notification.setUserData(cd);
        ((MemoryMXBeanImpl) ManagementFactory.getMemoryMXBean()).sendNotification(notification);
        AssertJUnit.assertEquals(0, listener.getNotificationsReceivedCount());
        // ListenerNotFoundException being thrown.
        try {
            proxyEmitter.removeNotificationListener(listener);
            Assert.fail("Should have thrown a ListenerNotFoundException!");
        } catch (ListenerNotFoundException e) {
            logger.debug("ListenerNotFoundException occurred, as expected: " + e.getMessage());
        }
    } catch (MalformedObjectNameException e) {
        Assert.fail("Unexpected MalformedObjectNameException : " + e.getMessage());
        e.printStackTrace();
    } catch (ListenerNotFoundException e) {
        Assert.fail("Unexpected ListenerNotFoundException : " + e.getMessage());
        e.printStackTrace();
    } catch (IOException e) {
        Assert.fail("Unexpected IOException : " + e.getMessage());
        e.printStackTrace();
    }
}

Example 58 with MemoryMXBean

use of java.lang.management.MemoryMXBean in project openj9 by eclipse.

the class TestManagementFactory method testGetMemoryMXBean.

@Test
public final void testGetMemoryMXBean() {
    MemoryMXBean mb = ManagementFactory.getMemoryMXBean();
    AssertJUnit.assertNotNull(mb);
    // Verify that there is only instance of the this bean
    MemoryMXBean mb2 = ManagementFactory.getMemoryMXBean();
    AssertJUnit.assertNotNull(mb2);
    AssertJUnit.assertSame(mb, mb2);
}

Example 59 with MemoryMXBean

use of java.lang.management.MemoryMXBean in project openj9 by eclipse.

the class TestManagementFactory method testMemoryMXBeanProxyNotificationEmitterGetInfo.

@Test
public void testMemoryMXBeanProxyNotificationEmitterGetInfo() {
    try {
        MemoryMXBean proxy = ManagementFactory.newPlatformMXBeanProxy(ManagementFactory.getPlatformMBeanServer(), "java.lang:type=Memory", MemoryMXBean.class);
        MemoryMXBean stdProxy = proxy;
        AssertJUnit.assertNotNull(stdProxy);
        AssertJUnit.assertTrue(proxy instanceof NotificationEmitter);
        NotificationEmitter proxyEmitter = (NotificationEmitter) proxy;
        // Verify that the notification info can be retreived OK
        MBeanNotificationInfo[] notifications = proxyEmitter.getNotificationInfo();
        AssertJUnit.assertNotNull(notifications);
        AssertJUnit.assertTrue(notifications.length > 0);
        for (int i = 0; i < notifications.length; i++) {
            MBeanNotificationInfo info = notifications[i];
            AssertJUnit.assertEquals(Notification.class.getName(), info.getName());
            AssertJUnit.assertEquals("Memory Notification", info.getDescription());
            String[] types = info.getNotifTypes();
            for (int j = 0; j < types.length; j++) {
                String type = types[j];
                AssertJUnit.assertTrue(type.equals(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED) || type.equals(MemoryNotificationInfo.MEMORY_COLLECTION_THRESHOLD_EXCEEDED));
            }
        // end for
        }
    // end for
    } catch (IOException e) {
        Assert.fail("Unexpected IOException : " + e.getMessage());
    }
}

Example 60 with MemoryMXBean

use of java.lang.management.MemoryMXBean in project openj9 by eclipse.

the class TestManagementFactory method testMemoryMXBeanProxyNotificationEmitterRemoveListeners.

@Test
public void testMemoryMXBeanProxyNotificationEmitterRemoveListeners() {
    try {
        MemoryMXBean proxy = ManagementFactory.newPlatformMXBeanProxy(ManagementFactory.getPlatformMBeanServer(), "java.lang:type=Memory", MemoryMXBean.class);
        AssertJUnit.assertNotNull(proxy);
        AssertJUnit.assertTrue(proxy instanceof NotificationEmitter);
        NotificationEmitter proxyEmitter = (NotificationEmitter) proxy;
        MyTestListener listener = new MyTestListener();
        proxyEmitter.addNotificationListener(listener, null, null);
        // Fire off a notification and ensure that the listener receives it.
        MemoryUsage mu = new MemoryUsage(1, 2, 3, 4);
        MemoryNotificationInfo info = new MemoryNotificationInfo("Marcel", mu, 42);
        CompositeData cd = TestUtil.toCompositeData(info);
        Notification notification = new Notification(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED, new ObjectName(ManagementFactory.MEMORY_MXBEAN_NAME), 42);
        notification.setUserData(cd);
        ((MemoryMXBeanImpl) ManagementFactory.getMemoryMXBean()).sendNotification(notification);
        AssertJUnit.assertEquals(1, listener.getNotificationsReceivedCount());
        // Verify that the handback is as expected.
        AssertJUnit.assertNull(listener.getHandback());
        // Verify the user data of the notification.
        Notification n = listener.getNotification();
        AssertJUnit.assertNotNull(n);
        verifyMemoryNotificationUserData(n.getUserData());
        // Remove the listener
        proxyEmitter.removeNotificationListener(listener);
        // Fire off a notification and ensure that the listener does
        // *not* receive it.
        listener.resetNotificationsReceivedCount();
        notification = new Notification(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED, new ObjectName(ManagementFactory.MEMORY_MXBEAN_NAME), 43);
        notification.setUserData(cd);
        ((MemoryMXBeanImpl) ManagementFactory.getMemoryMXBean()).sendNotification(notification);
        AssertJUnit.assertEquals(0, listener.getNotificationsReceivedCount());
        // ListenerNotFoundException being thrown.
        try {
            proxyEmitter.removeNotificationListener(listener);
            Assert.fail("Should have thrown a ListenerNotFoundException!");
        } catch (ListenerNotFoundException e) {
            logger.debug("ListenerNotFoundException occurred, as expected: " + e.getMessage());
        }
    } catch (MalformedObjectNameException e) {
        Assert.fail("Unexpected MalformedObjectNameException : " + e.getMessage());
        e.printStackTrace();
    } catch (ListenerNotFoundException e) {
        Assert.fail("Unexpected ListenerNotFoundException : " + e.getMessage());
        e.printStackTrace();
    } catch (IOException e) {
        Assert.fail("Unexpected IOException : " + e.getMessage());
        e.printStackTrace();
    }
}