org.apache.iceberg.hadoop

Class HadoopMetricsContext

java.lang.Object

org.apache.iceberg.hadoop.HadoopMetricsContext

All Implemented Interfaces:

java.io.Serializable, FileIOMetricsContext, MetricsContext

public class HadoopMetricsContext
extends java.lang.Object
implements FileIOMetricsContext

FileIO Metrics implementation that delegates to Hadoop FileSystem statistics implementation using the provided scheme.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.iceberg.metrics.MetricsContext

MetricsContext.Counter<T extends java.lang.Number>, MetricsContext.Unit

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	SCHEME

Fields inherited from interface org.apache.iceberg.io.FileIOMetricsContext

READ_BYTES, READ_OPERATIONS, WRITE_BYTES, WRITE_OPERATIONS

Constructor Summary

Constructors

Constructor and Description
HadoopMetricsContext(java.lang.String scheme)

Method Summary

Modifier and Type	Method and Description
<T extends java.lang.Number> MetricsContext.Counter<T>	counter(java.lang.String name, java.lang.Class<T> type, MetricsContext.Unit unit) The Hadoop implementation delegates to the FileSystem.Statistics implementation and therefore does not require support for operations like unit() and count() as the counter values are not directly consumed.
Counter	counter(java.lang.String name, MetricsContext.Unit unit) The Hadoop implementation delegates to the FileSystem.Statistics implementation and therefore does not require support for operations like unit() as the counter values are not directly consumed.
void	initialize(java.util.Map<java.lang.String,java.lang.String> properties)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.iceberg.metrics.MetricsContext

counter, histogram, nullMetrics, timer

Field Detail

SCHEME

public static final java.lang.String SCHEME

See Also:

Constant Field Values

Constructor Detail

HadoopMetricsContext

public HadoopMetricsContext(java.lang.String scheme)

Method Detail

initialize

public void initialize(java.util.Map<java.lang.String,java.lang.String> properties)

Specified by:

initialize in interface MetricsContext

counter

public <T extends java.lang.Number> MetricsContext.Counter<T> counter(java.lang.String name,
                                                                      java.lang.Class<T> type,
                                                                      MetricsContext.Unit unit)

The Hadoop implementation delegates to the FileSystem.Statistics implementation and therefore does not require support for operations like unit() and count() as the counter values are not directly consumed.

Specified by:

counter in interface MetricsContext

Type Parameters:

T - Counter numeric type

Parameters:

name - name of the metric

type - numeric type of the counter value

unit - ignored

Returns:

counter

counter

public Counter counter(java.lang.String name,
                       MetricsContext.Unit unit)

The Hadoop implementation delegates to the FileSystem.Statistics implementation and therefore does not require support for operations like unit() as the counter values are not directly consumed.

Specified by:

counter in interface MetricsContext

Parameters:

name - name of the metric

unit - ignored

Returns:

counter