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1
4 package com.tc.runtime;
5
6 import com.tc.logging.TCLogger;
7 import com.tc.logging.TCLogging;
8
9 class TCMemoryManagerJdk14 implements JVMMemoryManager {
10
11 private static final TCLogger logger = TCLogging.getLogger(TCMemoryManagerJdk14.class);
12
13 private final Runtime  rt;
14
15 public TCMemoryManagerJdk14() {
16 rt = Runtime.getRuntime();
17 if (rt.maxMemory() == Long.MAX_VALUE) {
18 logger.warn("Please specify Max memory using -Xmx flag for Memory manager to work properly");
19 }
20 }
21
22 public MemoryUsage getMemoryUsage() {
23 return new Jdk14MemoryUsage(rt);
24 }
25
26 public MemoryUsage getOldGenUsage() {
27 throw new UnsupportedOperationException ();
28 }
29
30 public boolean isMemoryPoolMonitoringSupported() {
31 return false;
32 }
33
34 private static final class Jdk14MemoryUsage implements MemoryUsage {
35
36 private final long max;
37 private final long used;
38 private final long free;
39 private final long total;
40 private final int usedPercentage;
41
42 public Jdk14MemoryUsage(Runtime rt) {
43 this.max = rt.maxMemory();
44 this.free = rt.freeMemory();
45 this.total = rt.totalMemory();
46 this.used = this.total - this.free;
47 if (this.max == Long.MAX_VALUE) {
48 this.usedPercentage = (int) (this.used * 100 / this.total);
49 } else {
50 this.usedPercentage = (int) (this.used * 100 / this.max);
51 }
52 }
53
54 public String getDescription() {
55 return "VM 1.4 Memory Usage";
56 }
57
58 public long getFreeMemory() {
59 return free;
60 }
61
62 public long getMaxMemory() {
63 return max;
64 }
65
66 public long getUsedMemory() {
67 return used;
68 }
69
70 public int getUsedPercentage() {
71 return usedPercentage;
72 }
73
74 public String toString() {
75 return "Jdk14MemoryUsage ( max = " + max + ", used = " + used + ", free = " + free + ", total = " + total
76 + ", used % = " + usedPercentage + ")";
77 }
78
79 public long getCollectionCount() {
81 return -1;
82 }
83
84 }
85 }
86 |
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