Package com.apple.foundationdb.record.provider.foundationdb

Enum OnlineIndexer.IndexStatePrecondition

java.lang.Object

java.lang.Enum<OnlineIndexer.IndexStatePrecondition>

com.apple.foundationdb.record.provider.foundationdb.OnlineIndexer.IndexStatePrecondition

All Implemented Interfaces:

Serializable, Comparable<OnlineIndexer.IndexStatePrecondition>

Enclosing class:

OnlineIndexer

public static enum OnlineIndexer.IndexStatePrecondition
extends Enum<OnlineIndexer.IndexStatePrecondition>

This defines in which situations the index should be built. BUILD_IF_DISABLED, BUILD_IF_DISABLED_CONTINUE_BUILD_IF_WRITE_ONLY, BUILD_IF_DISABLED_REBUILD_IF_WRITE_ONLY, and FORCE_BUILD are sorted in a way so that each option will build the index in more situations than the ones before it.

Of these, BUILD_IF_DISABLED_CONTINUE_BUILD_IF_WRITE_ONLY is recommended if there is no reason to believe current index data is corrupted.

Enum Constant Summary

Enum Constants

Enum Constant	Description
BUILD_IF_DISABLED	Only build if the index is disabled.
BUILD_IF_DISABLED_CONTINUE_BUILD_IF_WRITE_ONLY	Build if the index is disabled; Continue build if the index is write-only.
BUILD_IF_DISABLED_REBUILD_IF_WRITE_ONLY	Build if the index is disabled; Rebuild if the index is write-only.
ERROR_IF_DISABLED_CONTINUE_IF_WRITE_ONLY	Error if the index is disabled, or continue to build if the index is write only.
FORCE_BUILD	Rebuild the index anyway, no matter it it disabled or write-only or readable.

Method Summary

Modifier and Type	Method	Description
boolean	isContinueIfWriteOnly()
static OnlineIndexer.IndexStatePrecondition	valueOf(String name)	Returns the enum constant of this type with the specified name.
static OnlineIndexer.IndexStatePrecondition[]	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

BUILD_IF_DISABLED

public static final OnlineIndexer.IndexStatePrecondition BUILD_IF_DISABLED

Only build if the index is disabled.

BUILD_IF_DISABLED_CONTINUE_BUILD_IF_WRITE_ONLY

public static final OnlineIndexer.IndexStatePrecondition BUILD_IF_DISABLED_CONTINUE_BUILD_IF_WRITE_ONLY

Build if the index is disabled; Continue build if the index is write-only.

Recommended. This should be sufficient if current index data is not corrupted.

BUILD_IF_DISABLED_REBUILD_IF_WRITE_ONLY

public static final OnlineIndexer.IndexStatePrecondition BUILD_IF_DISABLED_REBUILD_IF_WRITE_ONLY

Build if the index is disabled; Rebuild if the index is write-only.

FORCE_BUILD

public static final OnlineIndexer.IndexStatePrecondition FORCE_BUILD

Rebuild the index anyway, no matter it it disabled or write-only or readable.

ERROR_IF_DISABLED_CONTINUE_IF_WRITE_ONLY

public static final OnlineIndexer.IndexStatePrecondition ERROR_IF_DISABLED_CONTINUE_IF_WRITE_ONLY

Error if the index is disabled, or continue to build if the index is write only. To use this option to build an index, one should mark the index as write-only and clear existing index entries before building. This option is provided to make OnlineIndexer.buildIndexAsync() (or its variations) behave same as what it did before version 2.8.90.0, which is not recommended. BUILD_IF_DISABLED_CONTINUE_BUILD_IF_WRITE_ONLY should be adopted instead.

Method Detail

values

public static OnlineIndexer.IndexStatePrecondition[] 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 (OnlineIndexer.IndexStatePrecondition c : OnlineIndexer.IndexStatePrecondition.values())
    System.out.println(c);

Returns:

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

valueOf

public static OnlineIndexer.IndexStatePrecondition 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

isContinueIfWriteOnly

public boolean isContinueIfWriteOnly()