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java.lang.Object org.apache.hadoop.metrics2.lib.MutableMetric org.apache.hadoop.metrics2.lib.MutableStat
@InterfaceAudience.Public @InterfaceStability.Evolving public class MutableStat
A mutable metric with stats. Useful for keeping throughput/latency stats.
Constructor Summary | |
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MutableStat(String name,
String description,
String sampleName,
String valueName)
Construct a snapshot stat metric with extended stat off by default |
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MutableStat(String name,
String description,
String sampleName,
String valueName,
boolean extended)
Construct a sample statistics metric |
Method Summary | |
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void |
add(long value)
Add a snapshot to the metric |
void |
add(long numSamples,
long sum)
Add a number of samples and their sum to the running stat |
void |
resetMinMax()
Reset the all time min max of the metric |
void |
snapshot(MetricsRecordBuilder builder,
boolean all)
Get a snapshot of the metric |
Methods inherited from class org.apache.hadoop.metrics2.lib.MutableMetric |
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changed, clearChanged, setChanged, snapshot |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public MutableStat(String name, String description, String sampleName, String valueName, boolean extended)
name
- of the metricdescription
- of the metricsampleName
- of the metric (e.g. "Ops")valueName
- of the metric (e.g. "Time", "Latency")extended
- create extended stats (stdev, min/max etc.) by default.public MutableStat(String name, String description, String sampleName, String valueName)
name
- of the metricdescription
- of the metricsampleName
- of the metric (e.g. "Ops")valueName
- of the metric (e.g. "Time", "Latency")Method Detail |
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public void add(long numSamples, long sum)
numSamples
- number of samplessum
- of the samplespublic void add(long value)
value
- of the metricpublic void snapshot(MetricsRecordBuilder builder, boolean all)
MutableMetric
snapshot
in class MutableMetric
builder
- the metrics record builderall
- if true, snapshot unchanged metrics as wellpublic void resetMinMax()
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