org.apache.accumulo.server.fs

Class PreferredVolumeChooser

java.lang.Object

org.apache.accumulo.server.fs.RandomVolumeChooser

org.apache.accumulo.server.fs.PreferredVolumeChooser

All Implemented Interfaces:

VolumeChooser

public class PreferredVolumeChooser
extends RandomVolumeChooser
implements VolumeChooser

A RandomVolumeChooser that limits its choices from a given set of options to the subset of those options preferred for a particular table. Defaults to selecting from all of the options presented. Can be customized via the table property "table.custom.preferredVolumes", which should contain a comma separated list of Volume URIs. Note that both the property name and the format of its value are specific to this particular implementation.

Field Summary

Fields

Modifier and Type	Field and Description
static String	PREFERRED_VOLUMES_CUSTOM_KEY This should match Property.TABLE_ARBITRARY_PROP_PREFIX

Constructor Summary

Constructors

Constructor and Description
PreferredVolumeChooser()

Method Summary

Modifier and Type	Method and Description
String	choose(VolumeChooserEnvironment env, String[] options)

Methods inherited from class java.lang.Object

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

Field Detail

PREFERRED_VOLUMES_CUSTOM_KEY

public static final String PREFERRED_VOLUMES_CUSTOM_KEY

This should match Property.TABLE_ARBITRARY_PROP_PREFIX

See Also:

Constant Field Values

Constructor Detail

PreferredVolumeChooser

public PreferredVolumeChooser()

Method Detail

choose

public String choose(VolumeChooserEnvironment env,
                     String[] options)

Specified by:

choose in interface VolumeChooser

Overrides:

choose in class RandomVolumeChooser