Package org.apache.accumulo.core.metadata.schema

Enum Ample.ReadConsistency

java.lang.Object

java.lang.Enum<Ample.ReadConsistency>

org.apache.accumulo.core.metadata.schema.Ample.ReadConsistency

All Implemented Interfaces:

Serializable, Comparable<Ample.ReadConsistency>

Enclosing interface:

Ample

public static enum Ample.ReadConsistency
extends Enum<Ample.ReadConsistency>

Controls how Accumulo metadata is read. Currently this only impacts reading the root tablet stored in Zookeeper. Reading data stored in the Accumulo metadata table is always immediate consistency.

Enum Constant Summary

Enum Constants

Enum Constant	Description
EVENTUAL	Read data in a way that may be faster but may yield out of date data.
IMMEDIATE	Read data in a way that is slower, but should always yield the latest data.

Method Summary

Modifier and Type	Method	Description
static Ample.ReadConsistency	valueOf(String name)	Returns the enum constant of this type with the specified name.
static Ample.ReadConsistency[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

IMMEDIATE

public static final Ample.ReadConsistency IMMEDIATE

Read data in a way that is slower, but should always yield the latest data. In addition to being slower, it's possible this read consistency can place higher load on shared resource which can negatively impact an entire cluster.

EVENTUAL

public static final Ample.ReadConsistency EVENTUAL

Read data in a way that may be faster but may yield out of date data.

Method Detail

values

public static Ample.ReadConsistency[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (Ample.ReadConsistency c : Ample.ReadConsistency.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static Ample.ReadConsistency valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null