org.gridgain.grid.cache

Enum GridCacheAtomicWriteOrderMode

java.lang.Object

java.lang.Enum<GridCacheAtomicWriteOrderMode>

org.gridgain.grid.cache.GridCacheAtomicWriteOrderMode

All Implemented Interfaces:

Serializable, Comparable<GridCacheAtomicWriteOrderMode>

public enum GridCacheAtomicWriteOrderMode
extends Enum<GridCacheAtomicWriteOrderMode>

Cache write ordering mode. This enumeration is taken into account only in GridCacheAtomicityMode.ATOMIC atomicity mode. Write ordering mode determines which node assigns the write version, sender or the primary node.

For example, CLOCK mode assigns write versions on a sender node which generally leads to better performance in GridCacheWriteSynchronizationMode.FULL_SYNC synchronization mode, since in this case sender can send write requests to primary and backups at the same time. Otherwise, if ordering mode is PRIMARY, it would only send request to primary node, which in turn will assign write version and forward it to backups.

CLOCK mode will be automatically configured only with GridCacheWriteSynchronizationMode.FULL_SYNC write synchronization mode, as for other synchronization modes it does not render better performance.

Enum Constant Summary

Enum Constants

Enum Constant and Description
CLOCK In this mode, write versions are assigned on a sender node which generally leads to better performance in GridCacheWriteSynchronizationMode.FULL_SYNC synchronization mode, since in this case sender can send write requests to primary and backups at the same time.
PRIMARY Cache version is assigned only on primary node.

Method Summary

Methods

Modifier and Type	Method and Description
static GridCacheAtomicWriteOrderMode	fromOrdinal(byte ord) Efficiently gets enumerated value from its ordinal.
static GridCacheAtomicWriteOrderMode	valueOf(String name) Returns the enum constant of this type with the specified name.
static GridCacheAtomicWriteOrderMode[]	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

CLOCK

public static final GridCacheAtomicWriteOrderMode CLOCK

In this mode, write versions are assigned on a sender node which generally leads to better performance in GridCacheWriteSynchronizationMode.FULL_SYNC synchronization mode, since in this case sender can send write requests to primary and backups at the same time.

This mode will be automatically configured only with GridCacheWriteSynchronizationMode.FULL_SYNC write synchronization mode, as for other synchronization modes it does not render better performance.

PRIMARY

public static final GridCacheAtomicWriteOrderMode PRIMARY

Cache version is assigned only on primary node. This means that sender will only send write request to primary node, which in turn will assign write version and forward it to backups.

Method Detail

values

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

Returns:

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

valueOf

public static GridCacheAtomicWriteOrderMode 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

fromOrdinal

@Nullable
public static GridCacheAtomicWriteOrderMode fromOrdinal(byte ord)

Efficiently gets enumerated value from its ordinal.

Parameters:

ord - Ordinal value.

Returns:

Enumerated value or null if ordinal out of range.