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 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 Description

HadoopMetricsContext(java.lang.String scheme)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	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 Hadoop 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.
`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

- 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 Hadoop 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