SpaceAwareVolumeChooser (Apache Accumulo Server Base 2.0.0 API)

java.lang.Object
- org.apache.accumulo.server.fs.RandomVolumeChooser
- - org.apache.accumulo.server.fs.PreferredVolumeChooser
  - - org.apache.accumulo.server.fs.SpaceAwareVolumeChooser

All Implemented Interfaces:

VolumeChooser
```
public class SpaceAwareVolumeChooser
extends PreferredVolumeChooser
```
A PreferredVolumeChooser that takes remaining HDFS space into account when making a volume choice rather than a simpler round robin. The list of volumes to use can be limited using the same properties as PreferredVolumeChooser

Nested Class Summary
- Nested classes/interfaces inherited from interface org.apache.accumulo.server.fs.VolumeChooser
  VolumeChooser.VolumeChooserException

Field Summary

Fields
Modifier and Type Field Description

static String RECOMPUTE_INTERVAL
- Fields inherited from class org.apache.accumulo.server.fs.RandomVolumeChooser
  random

Constructor Summary

Constructors
Constructor Description

SpaceAwareVolumeChooser()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`choose(VolumeChooserEnvironment env, String[] options)`	Choose a volume from the provided options.

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

- Field Detail
  - RECOMPUTE_INTERVAL
```
public static final String RECOMPUTE_INTERVAL
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - SpaceAwareVolumeChooser
```
public SpaceAwareVolumeChooser()
```
- Method Detail
  - choose
```
public String choose(VolumeChooserEnvironment env,
                     String[] options)
              throws VolumeChooser.VolumeChooserException
```
    Description copied from interface: VolumeChooser
    
    Choose a volume from the provided options.
    
    Specified by:
    
    choose in interface VolumeChooser
    
    Overrides:
    
    choose in class PreferredVolumeChooser
    
    Parameters:
    
    env - the server environment provided by the calling framework
    
    options - the list of volumes to choose from
    
    Returns:
    
    one of the options
    
    Throws:
    
    VolumeChooser.VolumeChooserException - if there is an error choosing (this is a RuntimeException); this does not preclude other RuntimeExceptions from occurring