MutableHistogram (Apache HBase 1.2.12 API)

java.lang.Object
- org.apache.hadoop.metrics2.lib.MutableMetric
- - org.apache.hadoop.metrics2.lib.MutableHistogram

All Implemented Interfaces:

MetricHistogram

Direct Known Subclasses:

MutableRangeHistogram
```
@InterfaceAudience.Private
public class MutableHistogram
extends org.apache.hadoop.metrics2.lib.MutableMetric
implements MetricHistogram
```
A histogram implementation that runs in constant space, and exports to hadoop2's metrics2 system.

Field Summary

Fields
Modifier and Type	Field and Description
`private AtomicLong`	`count`
`private static double`	`DEFAULT_ALPHA`
`private static int`	`DEFAULT_SAMPLE_SIZE`
`protected String`	`desc`
`private AtomicLong`	`max`
`private String`	`MAX_METRIC`
`private String`	`MEAN_METRIC`
`private String`	`MEDIAN_METRIC`
`private boolean`	`metricsInfoStringInited`
`private AtomicLong`	`min`
`private String`	`MIN_METRIC`
`protected String`	`name`
`private String`	`NINETIETH_PERCENTILE_METRIC`
`private String`	`NINETY_FIFTH_PERCENTILE_METRIC`
`private String`	`NINETY_NINETH_PERCENTILE_METRIC`
`private String`	`NUM_OPS_METRIC`
`private com.yammer.metrics.stats.Sample`	`sample`
`private String`	`SEVENTY_FIFTH_PERCENTILE_METRIC`
`private AtomicLong`	`sum`

Fields inherited from interface org.apache.hadoop.metrics2.MetricHistogram
MAX_METRIC_NAME, MEAN_METRIC_NAME, MEDIAN_METRIC_NAME, MIN_METRIC_NAME, NINETIETH_PERCENTILE_METRIC_NAME, NINETY_FIFTH_PERCENTILE_METRIC_NAME, NINETY_NINETH_PERCENTILE_METRIC_NAME, NUM_OPS_METRIC_NAME, SEVENTY_FIFTH_PERCENTILE_METRIC_NAME

Constructor Summary

Constructors
Constructor and Description

MutableHistogram(org.apache.hadoop.metrics2.MetricsInfo info)

MutableHistogram(String name, String description)

Constructors
Constructor and Description
`MutableHistogram(org.apache.hadoop.metrics2.MetricsInfo info)`
`MutableHistogram(String name, String description)`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`add(long val)` Add a single value to a histogram's stream of values.
`long`	`getMax()`
`double`	`getMean()`
`long`	`getMin()`
`private void`	`setMax(long potentialMax)`
`private void`	`setMin(long potentialMin)`
`void`	`snapshot(org.apache.hadoop.metrics2.MetricsRecordBuilder metricsRecordBuilder, boolean all)`
`void`	`updateSnapshotMetrics(org.apache.hadoop.metrics2.MetricsRecordBuilder metricsRecordBuilder)`

Methods inherited from class org.apache.hadoop.metrics2.lib.MutableMetric
changed, clearChanged, setChanged, snapshot

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_SAMPLE_SIZE
```
private static final int DEFAULT_SAMPLE_SIZE
```
See Also:
Constant Field Values

DEFAULT_ALPHA
```
private static final double DEFAULT_ALPHA
```
See Also:
Constant Field Values

name
```
protected final String name
```

desc
```
protected final String desc
```

sample

private final com.yammer.metrics.stats.Sample sample

min
```
private final AtomicLong min
```

max
```
private final AtomicLong max
```

sum
```
private final AtomicLong sum
```

count
```
private final AtomicLong count
```

metricsInfoStringInited

private boolean metricsInfoStringInited

NUM_OPS_METRIC
```
private String NUM_OPS_METRIC
```

MIN_METRIC
```
private String MIN_METRIC
```

MAX_METRIC
```
private String MAX_METRIC
```

MEAN_METRIC
```
private String MEAN_METRIC
```

MEDIAN_METRIC
```
private String MEDIAN_METRIC
```

SEVENTY_FIFTH_PERCENTILE_METRIC

private String SEVENTY_FIFTH_PERCENTILE_METRIC

NINETIETH_PERCENTILE_METRIC

private String NINETIETH_PERCENTILE_METRIC

NINETY_FIFTH_PERCENTILE_METRIC

private String NINETY_FIFTH_PERCENTILE_METRIC

NINETY_NINETH_PERCENTILE_METRIC

private String NINETY_NINETH_PERCENTILE_METRIC

Constructor Detail

MutableHistogram

public MutableHistogram(org.apache.hadoop.metrics2.MetricsInfo info)

MutableHistogram

public MutableHistogram(String name,
                String description)

Method Detail

add
```
public void add(long val)
```
Description copied from interface: MetricHistogram

Add a single value to a histogram's stream of values.

Specified by:

add in interface MetricHistogram

setMax

private void setMax(long potentialMax)

setMin

private void setMin(long potentialMin)

getMax
```
public long getMax()
```

getMin
```
public long getMin()
```

getMean
```
public double getMean()
```

snapshot

public void snapshot(org.apache.hadoop.metrics2.MetricsRecordBuilder metricsRecordBuilder,
            boolean all)

Specified by:: snapshot in class org.apache.hadoop.metrics2.lib.MutableMetric

updateSnapshotMetrics

public void updateSnapshotMetrics(org.apache.hadoop.metrics2.MetricsRecordBuilder metricsRecordBuilder)

Class MutableHistogram

Field Summary

Fields inherited from interface org.apache.hadoop.metrics2.MetricHistogram

Constructor Summary

Method Summary

Methods inherited from class org.apache.hadoop.metrics2.lib.MutableMetric

Methods inherited from class java.lang.Object

Field Detail

DEFAULT_SAMPLE_SIZE

DEFAULT_ALPHA

name

desc

sample

min

max

sum

count

metricsInfoStringInited

NUM_OPS_METRIC

MIN_METRIC

MAX_METRIC

MEAN_METRIC

MEDIAN_METRIC

SEVENTY_FIFTH_PERCENTILE_METRIC

NINETIETH_PERCENTILE_METRIC

NINETY_FIFTH_PERCENTILE_METRIC

NINETY_NINETH_PERCENTILE_METRIC

Constructor Detail

MutableHistogram

MutableHistogram

Method Detail

add

setMax

setMin

getMax

getMin

getMean

snapshot

updateSnapshotMetrics