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19 package org.apache.hadoop.hbase.client.metrics;
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21 import com.google.common.collect.ImmutableMap;
22 import org.apache.commons.logging.Log;
23 import org.apache.commons.logging.LogFactory;
24 import org.apache.hadoop.classification.InterfaceAudience;
25 import org.apache.hadoop.classification.InterfaceStability;
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27 import java.util.HashMap;
28 import java.util.Map;
29 import java.util.concurrent.atomic.AtomicLong;
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43 @InterfaceAudience.Public
44 @InterfaceStability.Evolving
45 public class ScanMetrics {
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48 private static final Log LOG = LogFactory.getLog(ScanMetrics.class);
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53 private final Map<String, AtomicLong> counters = new HashMap<String, AtomicLong>();
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63 public final AtomicLong countOfRPCcalls = createCounter("RPC_CALLS");
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68 public final AtomicLong countOfRemoteRPCcalls = createCounter("REMOTE_RPC_CALLS");
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73 public final AtomicLong sumOfMillisSecBetweenNexts = createCounter("MILLIS_BETWEEN_NEXTS");
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78 public final AtomicLong countOfNSRE = createCounter("NOT_SERVING_REGION_EXCEPTION");
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83 public final AtomicLong countOfBytesInResults = createCounter("BYTES_IN_RESULTS");
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88 public final AtomicLong countOfBytesInRemoteResults = createCounter("BYTES_IN_REMOTE_RESULTS");
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93 public final AtomicLong countOfRegions = createCounter("REGIONS_SCANNED");
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98 public final AtomicLong countOfRPCRetries = createCounter("RPC_RETRIES");
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103 public final AtomicLong countOfRemoteRPCRetries = createCounter("REMOTE_RPC_RETRIES");
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108 public ScanMetrics() {
109 }
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111 private AtomicLong createCounter(String counterName) {
112 AtomicLong c = new AtomicLong(0);
113 counters.put(counterName, c);
114 return c;
115 }
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117 public void setCounter(String counterName, long value) {
118 AtomicLong c = this.counters.get(counterName);
119 if (c != null) {
120 c.set(value);
121 }
122 }
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131 public Map<String, Long> getMetricsMap() {
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133 ImmutableMap.Builder<String, Long> builder = ImmutableMap.builder();
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135 for (Map.Entry<String, AtomicLong> e : this.counters.entrySet()) {
136 builder.put(e.getKey(), e.getValue().getAndSet(0));
137 }
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139 return builder.build();
140 }
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142 }