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0N/A */
0N/A
0N/A/*
0N/A * @test
0N/A * @bug 6546089
0N/A * @summary Basic unit test of MemoryPoolMXBean.isUsageThresholdExceeded() and
0N/A * MemoryPoolMXBean.isCollectionThresholdExceeded().
0N/A * @author Mandy Chung
0N/A *
0N/A * @run main ThresholdTest
0N/A */
0N/A
0N/Aimport java.lang.management.*;
0N/Aimport java.util.*;
0N/A
0N/Apublic class ThresholdTest {
0N/A public static void main(String args[]) throws Exception {
0N/A List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
2495N/A try {
2495N/A for (MemoryPoolMXBean p : pools) {
2495N/A // verify if isUsageThresholdExceeded() returns correct value
2495N/A checkUsageThreshold(p);
2495N/A // verify if isCollectionUsageThresholdExceeded() returns correct value
2495N/A checkCollectionUsageThreshold(p);
2495N/A }
2495N/A } finally {
2495N/A // restore the default
2495N/A for (MemoryPoolMXBean p : pools) {
2495N/A if (p.isUsageThresholdSupported()) {
2495N/A p.setUsageThreshold(0);
2495N/A }
2495N/A if (p.isCollectionUsageThresholdSupported()) {
2495N/A p.setCollectionUsageThreshold(0);
2495N/A }
2495N/A }
0N/A }
0N/A
0N/A System.out.println("Test passed.");
0N/A }
0N/A
0N/A private static void checkUsageThreshold(MemoryPoolMXBean p) throws Exception {
0N/A
0N/A if (!p.isUsageThresholdSupported()) {
0N/A return;
0N/A }
0N/A
0N/A long threshold = p.getUsageThreshold();
0N/A if (threshold != 0) {
0N/A // Expect the default threshold is zero (disabled)
0N/A throw new RuntimeException("TEST FAILED: " +
0N/A "Pool " + p.getName() +
0N/A " has non-zero threshold (" + threshold);
0N/A }
0N/A
0N/A // isUsageThresholdExceeded() should return false if threshold == 0
0N/A if (p.isUsageThresholdExceeded()) {
0N/A throw new RuntimeException("TEST FAILED: " +
0N/A "Pool " + p.getName() +
0N/A " isUsageThresholdExceeded() returned true" +
0N/A " but threshold = 0");
0N/A }
0N/A
0N/A p.setUsageThreshold(1);
0N/A MemoryUsage u = p.getUsage();
0N/A if (u.getUsed() >= 1) {
0N/A if (!p.isUsageThresholdExceeded()) {
0N/A throw new RuntimeException("TEST FAILED: " +
0N/A "Pool " + p.getName() +
0N/A " isUsageThresholdExceeded() returned false but " +
0N/A " threshold(" + p.getUsageThreshold() +
0N/A ") <= used(" + u.getUsed() + ")");
0N/A }
0N/A } else {
0N/A if (p.isUsageThresholdExceeded()) {
0N/A throw new RuntimeException("TEST FAILED: " +
0N/A "Pool " + p.getName() +
0N/A " isUsageThresholdExceeded() returned true but" +
0N/A " threshold(" + p.getUsageThreshold() +
0N/A ") > used(" + u.getUsed() + ")");
0N/A }
0N/A }
0N/A
0N/A // disable low memory detection and isUsageThresholdExceeded()
0N/A // should return false
0N/A p.setUsageThreshold(0);
0N/A if (p.isUsageThresholdExceeded()) {
0N/A throw new RuntimeException("TEST FAILED: " +
0N/A "Pool " + p.getName() +
0N/A " isUsageThresholdExceeded() returned true but threshold = 0");
0N/A }
0N/A }
0N/A
0N/A private static void checkCollectionUsageThreshold(MemoryPoolMXBean p) throws Exception {
0N/A
0N/A if (!p.isCollectionUsageThresholdSupported()) {
0N/A return;
0N/A }
0N/A
0N/A long threshold = p.getCollectionUsageThreshold();
0N/A if (threshold != 0) {
0N/A // Expect the default threshold is zero (disabled)
0N/A throw new RuntimeException("TEST FAILED: " +
0N/A "Pool " + p.getName() +
0N/A " has non-zero threshold (" + threshold);
0N/A }
0N/A
0N/A // isCollectionUsageThresholdExceeded() should return false if threshold == 0
0N/A if (p.isCollectionUsageThresholdExceeded()) {
0N/A throw new RuntimeException("TEST FAILED: " +
0N/A "Pool " + p.getName() +
0N/A " isCollectionUsageThresholdExceeded() returned true" +
0N/A " but threshold = 0");
0N/A }
0N/A
0N/A p.setCollectionUsageThreshold(1);
0N/A MemoryUsage u = p.getCollectionUsage();
0N/A if (u == null) {
0N/A if (p.isCollectionUsageThresholdExceeded()) {
0N/A throw new RuntimeException("TEST FAILED: " +
0N/A "Pool " + p.getName() +
0N/A " isCollectionUsageThresholdExceeded() returned true but" +
0N/A " getCollectionUsage() return null");
0N/A }
0N/A } else if (u.getUsed() >= 1) {
0N/A if (!p.isCollectionUsageThresholdExceeded()) {
0N/A throw new RuntimeException("TEST FAILED: " +
0N/A "Pool " + p.getName() +
0N/A " isCollectionUsageThresholdExceeded() returned false but " +
0N/A " threshold(" + p.getCollectionUsageThreshold() +
0N/A ") < used(" + u.getUsed() + ")");
0N/A }
0N/A } else {
0N/A if (p.isCollectionUsageThresholdExceeded()) {
0N/A throw new RuntimeException("TEST FAILED: " +
0N/A "Pool " + p.getName() +
0N/A " isCollectionUsageThresholdExceeded() returned true but" +
0N/A " threshold(" + p.getCollectionUsageThreshold() +
0N/A ") > used(" + u.getUsed() + ")");
0N/A }
0N/A }
0N/A
0N/A // disable low memory detection and isCollectionUsageThresholdExceeded()
0N/A // should return false
0N/A p.setCollectionUsageThreshold(0);
0N/A if (p.isCollectionUsageThresholdExceeded()) {
0N/A throw new RuntimeException("TEST FAILED: " +
0N/A "Pool " + p.getName() +
0N/A " isCollectionUsageThresholdExceeded() returned true but threshold = 0");
0N/A }
0N/A }
0N/A}