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

Example 31 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project jekejeke-devel by jburse.

the class HotspotUsage method addListener.

/**
 * <p>Add a notification listener.</p>
 * <p>If this is the first listener save and init the threshold.</p>
 *
 * @param listener The listener.
 */
public final void addListener(NotificationListener listener) {
    synchronized (thresholds) {
        if (count == 0) {
            Iterator<MemoryPoolMXBean> pool = ManagementFactory.getMemoryPoolMXBeans().iterator();
            while (pool.hasNext()) {
                MemoryPoolMXBean pbean = pool.next();
                if (pbean.isUsageThresholdSupported()) {
                    long threshold = pbean.getUsageThreshold();
                    thresholds.put(pbean.getName(), Long.valueOf(threshold));
                    threshold = pbean.getUsage().getMax() * 85 / 100;
                    pbean.setUsageThreshold(threshold);
                }
            }
        }
        count++;
    }
    NotificationEmitter emitter = (NotificationEmitter) ManagementFactory.getMemoryMXBean();
    emitter.addNotificationListener(listener, null, null);
}

Example 32 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project jekejeke-devel by jburse.

the class HotspotUsage method removeListener.

/**
 * <p>Remove a notificatio listener.</p>
 * <p>If this is the last listener restore the threshold.</p>
 *
 * @param listener The listener.
 */
public final void removeListener(NotificationListener listener) {
    NotificationEmitter emitter = (NotificationEmitter) ManagementFactory.getMemoryMXBean();
    try {
        emitter.removeNotificationListener(listener, null, null);
    } catch (ListenerNotFoundException e) {
        throw new RuntimeException(e);
    }
    synchronized (thresholds) {
        count--;
        if (count == 0) {
            Iterator<MemoryPoolMXBean> pool = ManagementFactory.getMemoryPoolMXBeans().iterator();
            while (pool.hasNext()) {
                MemoryPoolMXBean pbean = pool.next();
                if (pbean.isUsageThresholdSupported()) {
                    long threshold = thresholds.get(pbean.getName()).longValue();
                    pbean.setUsageThreshold(threshold);
                }
            }
        }
    }
}

Example 33 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project OpenOLAT by OpenOLAT.

the class MemoryWebService method createMemoryPools.

private MemoryPoolVO[] createMemoryPools() {
    List<MemoryPoolMXBean> memoryPool = ManagementFactory.getMemoryPoolMXBeans();
    MemoryPoolVO[] voes = new MemoryPoolVO[memoryPool.size()];
    int count = 0;
    for (MemoryPoolMXBean bean : memoryPool) {
        if (bean.isValid()) {
            voes[count++] = new MemoryPoolVO(bean);
        }
    }
    return voes;
}

Example 34 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project btrace by btraceio.

the class BTraceRuntime method getMemoryPoolUsage.

static String getMemoryPoolUsage(String poolFormat) {
    if (poolFormat == null) {
        poolFormat = "%1$s;%2$d;%3$d;%4$d;%5$d";
    }
    Object[][] poolOutput = new Object[memPoolList.size()][5];
    StringBuilder membuffer = new StringBuilder();
    for (int i = 0; i < memPoolList.size(); i++) {
        MemoryPoolMXBean memPool = memPoolList.get(i);
        poolOutput[i][0] = memPool.getName();
        poolOutput[i][1] = memPool.getUsage().getMax();
        poolOutput[i][2] = memPool.getUsage().getUsed();
        poolOutput[i][3] = memPool.getUsage().getCommitted();
        poolOutput[i][4] = memPool.getUsage().getInit();
    }
    for (Object[] memPoolOutput : poolOutput) {
        membuffer.append(String.format(poolFormat, memPoolOutput)).append("\n");
    }
    return membuffer.toString();
}

Example 35 with MemoryPoolMXBean

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

the class TestMemoryPoolMXBean method testBadSetAttribute.

@Test
public final void testBadSetAttribute() {
    MemoryPoolMXBean testImpl = testBean;
    // Let's try and set some non-writable attributes.
    Attribute attr = new Attribute("UsageThresholdCount", new Long(25));
    try {
        mbs.setAttribute(objName, attr);
        Assert.fail("Unreacheable code: should have thrown an exception.");
    } catch (Exception e) {
        logger.debug("testBadSetAttribute exception:" + e.getClass().getName() + ", errMessage=" + e.getMessage());
        AssertJUnit.assertTrue(e instanceof AttributeNotFoundException);
    }
    // Try and set the UsageThreshold attribute with an incorrect
    // type.
    attr = new Attribute("UsageThreshold", "rubbish");
    try {
        mbs.setAttribute(objName, attr);
        Assert.fail("Unreacheable code: should have thrown an exception");
    } catch (Exception e) {
        AssertJUnit.assertTrue(e instanceof InvalidAttributeValueException);
    }
}