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20 package org.apache.hadoop.hbase.regionserver.wal;
21
22 import java.io.IOException;
23
24 import org.apache.commons.logging.Log;
25 import org.apache.commons.logging.LogFactory;
26 import org.apache.hadoop.fs.Path;
27 import org.apache.hadoop.hbase.classification.InterfaceAudience;
28 import org.apache.hadoop.hbase.CompatibilitySingletonFactory;
29 import org.apache.hadoop.hbase.HRegionInfo;
30 import org.apache.hadoop.hbase.HTableDescriptor;
31 import org.apache.hadoop.util.StringUtils;
32
33 import com.google.common.annotations.VisibleForTesting;
34
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38
39
40 @InterfaceAudience.Private
41 public class MetricsWAL implements WALActionsListener {
42 static final Log LOG = LogFactory.getLog(MetricsWAL.class);
43
44 private final MetricsWALSource source;
45
46 public MetricsWAL() {
47 this(CompatibilitySingletonFactory.getInstance(MetricsWALSource.class));
48 }
49
50 @VisibleForTesting
51 MetricsWAL(MetricsWALSource s) {
52 this.source = s;
53 }
54
55 public void finishSync(long time) {
56 source.incrementSyncTime(time);
57 }
58
59 public void finishAppend(long time, long size) {
60
61 source.incrementAppendCount();
62 source.incrementAppendTime(time);
63 source.incrementAppendSize(size);
64
65 if (time > 1000) {
66 source.incrementSlowAppendCount();
67 LOG.warn(String.format("%s took %d ms appending an edit to hlog; len~=%s",
68 Thread.currentThread().getName(),
69 time,
70 StringUtils.humanReadableInt(size)));
71 }
72 }
73
74 @Override
75 public void logRollRequested(boolean underReplicated) {
76 source.incrementLogRollRequested();
77 if (underReplicated) {
78 source.incrementLowReplicationLogRoll();
79 }
80 }
81
82 @Override
83 public void preLogRoll(Path oldPath, Path newPath) throws IOException {
84 }
85
86 @Override
87 public void postLogRoll(Path oldPath, Path newPath) throws IOException {
88 }
89
90 @Override
91 public void preLogArchive(Path oldPath, Path newPath) throws IOException {
92 }
93
94 @Override
95 public void postLogArchive(Path oldPath, Path newPath) throws IOException {
96 }
97
98 @Override
99 public void logCloseRequested() {
100 }
101
102 @Override
103 public void visitLogEntryBeforeWrite(HRegionInfo info, HLogKey logKey, WALEdit logEdit) {
104 }
105
106 @Override
107 public void visitLogEntryBeforeWrite(HTableDescriptor htd, HLogKey logKey, WALEdit logEdit) {
108 }
109 }