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1
4 package com.tc.objectserver.impl;
5
6 import com.tc.logging.TCLogger;
7 import com.tc.objectserver.api.GCStats;
8 import com.tc.stats.LossyStack;
9
10 import java.util.List  ;
11 import java.util.Set ;
12
13 public class GCLogger {
14 private TCLogger logger;
15 private final LossyStack gcHistory = new LossyStack(1000);
16 private final boolean verboseGC;
17
18 public GCLogger(TCLogger logger, boolean verboseGC) {
19 this.logger = logger;
20 this.verboseGC = verboseGC;
21 }
22
23 public void push(Object obj) {
24 gcHistory.push(obj);
25 }
26
27 public GCStats[] getGarbageCollectorStats() {
28 return (GCStats[]) gcHistory.toArray(new GCStats[gcHistory.depth()]);
29 }
30
31 public void log_GCStart(long iteration) {
32 if (verboseGC()) logGC("GC: START " + iteration);
33 }
34
35 public void log_markStart(Set managedIdSet) {
36 if (verboseGC()) logGC("GC: pre-GC managed id count: " + managedIdSet.size());
37 }
38
39 public void log_markResults(Set gcResults) {
40 if (verboseGC()) logGC("GC: pre-rescue GC results: " + gcResults.size());
41 }
42
43 public void log_quiescing() {
44 if (verboseGC()) logGC("GC: quiescing...");
45 }
46
47 public void log_paused() {
48 if (verboseGC()) logGC("GC: paused.");
49 }
50
51 public void log_rescue(int pass, Set objectIDs) {
52 if (verboseGC()) logGC("GC: rescue pass " + pass + " on " + objectIDs.size() + " objects...");
53 }
54
55 public void log_sweep(Set toDelete) {
56 if (verboseGC()) logGC("GC: deleting garbage: " + toDelete.size() + " objects");
57 }
58
59 public void log_notifyGCComplete() {
60 if (verboseGC()) logGC("GC: notifying gc complete...");
61 }
62
63 public void log_GCComplete(long startMillis, long pauseStartMillis, List rescueTimes, long endMillis, long iteration) {
64 if (verboseGC()) {
65 long pausedMillis = endMillis - pauseStartMillis;
66 long totalMillis = endMillis - startMillis;
67 for (int i = 0; i < rescueTimes.size(); i++) {
68 logGC("GC: rescue " + (i + 1) + " time : " + rescueTimes.get(i) + " ms.");
69 }
70 logGC("GC: paused gc time : " + pausedMillis + " ms.");
71 logGC("GC: total gc time : " + totalMillis + " ms.");
72 logGC("GC: STOP " + iteration);
73 }
74 }
75
76 public boolean verboseGC() {
77 return verboseGC;
78 }
79
80 private void logGC(Object o) {
81 if (verboseGC) {
82 logger.info(o);
83 }
84 }
85 }
86 |
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