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1
4 package com.tc.runtime;
5
6 import com.tc.test.TCTestCase;
7
8 import java.lang.management.ManagementFactory  ;
9 import java.lang.management.MemoryPoolMXBean ;
10 import java.util.Iterator ;
11 import java.util.List ;
12
13 public class MemoryPoolsTest extends TCTestCase {
14
15 public void testMemoryPools() throws Exception {
16 List pools = ManagementFactory.getMemoryPoolMXBeans();
17 for (Iterator i = pools.iterator(); i.hasNext();) {
18 MemoryPoolMXBean mpBean = (MemoryPoolMXBean ) i.next();
19 System.err.println(mpBean);
20 System.err.println(" Name = " + mpBean.getName());
21 System.err.println(" Usage Threashold supported = " + mpBean.isUsageThresholdSupported());
22 System.err.println(" Collection Usage = " + mpBean.getCollectionUsage());
23 System.err.println(" Type = " + mpBean.getType());
24 System.err.println(" Usage = " + mpBean.getUsage());
25 System.err.println("=====================");
26 }
27 JVMMemoryManager memManager = new TCMemoryManagerJdk15();
28 assertTrue(memManager.isMemoryPoolMonitoringSupported());
29 MemoryUsage mu1 = memManager.getOldGenUsage();
30 assertNotNull(mu1);
31 long collectorCount1 = mu1.getCollectionCount();
32 System.err.println("Collector Count = " + collectorCount1);
33 assertTrue(collectorCount1 > -1);
34 System.gc();
35 MemoryUsage mu2 = memManager.getOldGenUsage();
36 assertNotNull(mu2);
37 long collectorCount2 = mu2.getCollectionCount();
38 System.err.println("Now the Collector Count is " + collectorCount2);
39 assertTrue(collectorCount2 > collectorCount1);
40 }
41 }
42 |
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