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

Example 61 with MemoryMXBean

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

the class TestManagementFactory method testMemoryMXBeanProxy.

@Test
public void testMemoryMXBeanProxy() {
    try {
        MemoryMXBean proxy = ManagementFactory.newPlatformMXBeanProxy(ManagementFactory.getPlatformMBeanServer(), "java.lang:type=Memory", MemoryMXBean.class);
        MemoryMXBean stdProxy = proxy;
        AssertJUnit.assertNotNull(stdProxy);
        AssertJUnit.assertNotNull(proxy.toString());
        AssertJUnit.assertEquals("java.lang:type=Memory", proxy.getObjectName().toString());
        MemoryUsage proxiedUsage = proxy.getHeapMemoryUsage();
        AssertJUnit.assertNotNull(proxiedUsage);
        AssertJUnit.assertTrue(proxiedUsage.getCommitted() > -1);
        AssertJUnit.assertTrue(proxiedUsage.getUsed() > -1);
        int proxiedCount = proxy.getObjectPendingFinalizationCount();
        AssertJUnit.assertTrue(proxiedCount > -1);
        AssertJUnit.assertEquals(proxy.isVerbose(), ManagementFactory.getMemoryMXBean().isVerbose());
    // TODO : Test out setVerbose when the VM API is implemented.
    } catch (IOException e) {
        Assert.fail("Unexpected IOException : " + e.getMessage());
        e.printStackTrace();
    }
}

Example 62 with MemoryMXBean

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

the class MemoryMXBeanShutdownNotification method hookAction.

private static void hookAction() {
    logger.info("The hook thread is running.");
    try {
        MemoryMXBean bean = ManagementFactory.getMemoryMXBean();
        logger.info("Bean successfully initialized " + bean.getObjectPendingFinalizationCount());
    } catch (Exception e) {
        unexpected(e);
    }
}

Example 63 with MemoryMXBean

use of java.lang.management.MemoryMXBean in project pravega by pravega.

the class Main method onShutdown.

@VisibleForTesting
static void onShutdown(ControllerServiceMain controllerServiceMain) {
    MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
    boolean previousVerbose = memoryMXBean.isVerbose();
    memoryMXBean.setVerbose(true);
    try {
        log.info("Shutdown hook memory usage dump: Heap memory usage: {}, non heap memory usage {}", memoryMXBean.getHeapMemoryUsage(), memoryMXBean.getNonHeapMemoryUsage());
    } finally {
        memoryMXBean.setVerbose(previousVerbose);
    }
    log.info("Controller service shutting down");
    try {
        controllerServiceMain.stopAsync();
        controllerServiceMain.awaitTerminated();
    } finally {
        if (Config.DUMP_STACK_ON_SHUTDOWN) {
            Thread.getAllStackTraces().forEach((key, value) -> log.info("Shutdown Hook Thread dump: Thread {} stackTrace: {} ", key.getName(), value));
        }
    }
}

Example 64 with MemoryMXBean

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

the class GitRepositoriesViewRepoDeletionTest method waitForFinalization.

/**
 * Best-effort attempt to get finalization to occur.
 *
 * @param maxMillis
 *            maximum amount of time in milliseconds to try getting the
 *            garbage collector to finalize objects
 */
private void waitForFinalization(int maxMillis) {
    long stop = System.currentTimeMillis() + maxMillis;
    MemoryMXBean memoryBean = ManagementFactory.getMemoryMXBean();
    do {
        System.gc();
        try {
            Thread.sleep(100);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            break;
        }
    } while (System.currentTimeMillis() < stop && memoryBean.getObjectPendingFinalizationCount() > 0);
}

Example 65 with MemoryMXBean

use of java.lang.management.MemoryMXBean in project openolat by klemens.

the class RuntimeWebService method getMemoryStatisticsVO.

private MemoryStatisticsVO getMemoryStatisticsVO() {
    MemoryStatisticsVO stats = new MemoryStatisticsVO();
    Runtime runtime = Runtime.getRuntime();
    stats.setUsedMemory((runtime.totalMemory() - runtime.freeMemory()) / mb);
    stats.setFreeMemory(runtime.freeMemory() / mb);
    stats.setTotalMemory(runtime.totalMemory() / mb);
    MemoryMXBean memoryBean = ManagementFactory.getMemoryMXBean();
    stats.setInitHeap(memoryBean.getHeapMemoryUsage().getInit() / mb);
    stats.setInitNonHeap(memoryBean.getNonHeapMemoryUsage().getInit() / mb);
    stats.setUsedHeap(memoryBean.getHeapMemoryUsage().getUsed() / mb);
    stats.setUsedNonHeap(memoryBean.getNonHeapMemoryUsage().getUsed() / mb);
    stats.setCommittedHeap(memoryBean.getHeapMemoryUsage().getCommitted() / mb);
    stats.setCommittedNonHeap(memoryBean.getNonHeapMemoryUsage().getCommitted() / mb);
    stats.setMaxHeap(memoryBean.getHeapMemoryUsage().getMax() / mb);
    stats.setMaxNonHeap(memoryBean.getNonHeapMemoryUsage().getMax() / mb);
    long collectionTime = 0l;
    long collectionCount = 0l;
    List<GarbageCollectorMXBean> gcBeans = ManagementFactory.getGarbageCollectorMXBeans();
    for (GarbageCollectorMXBean gcBean : gcBeans) {
        collectionCount += gcBean.getCollectionCount();
        collectionTime += gcBean.getCollectionTime();
    }
    stats.setGarbageCollectionCount(collectionCount);
    stats.setGarbageCollectionTime(collectionTime);
    return stats;
}