org.infinispan.topology

Enum CacheTopology.Phase

java.lang.Object

java.lang.Enum<CacheTopology.Phase>

org.infinispan.topology.CacheTopology.Phase

All Implemented Interfaces:

Serializable, Comparable<CacheTopology.Phase>

Enclosing class:

CacheTopology

public static enum CacheTopology.Phase
extends Enum<CacheTopology.Phase>

Phase of the rebalance process. Using four phases guarantees these properties: 1. T(x+1).writeCH contains all nodes from Tx.readCH (this is the requirement for ISPN-5021) 2. Tx.readCH and T(x+1).readCH has non-empty subset of nodes (that will allow no blocking for read commands and reading only entries node owns according to readCH) Old entries should be wiped out only after coming to the NO_REBALANCE phase.

Enum Constant Summary

Enum Constants

Enum Constant and Description
CONFLICT_RESOLUTION Interim state between NO_REBALANCE → READ_OLD_WRITE_ALL readCh is set locally using previous Topology (of said node) readCH, whilst writeCH contains all members after merge
NO_REBALANCE Only currentCH should be set, this works as both readCH and writeCH
READ_ALL_WRITE_ALL Used after state transfer completes: readCH == writeCH = unionCH
READ_NEW_WRITE_ALL Intermediate state that prevents ISPN-5021: readCH == pendingCH, writeCH = unionCH
READ_OLD_WRITE_ALL Used during state transfer: readCH == currentCH, writeCH = unionCH
TRANSITORY Used by caches that don't use 4-phase topology change.

Method Summary

Modifier and Type	Method and Description
boolean	isRebalance()
static CacheTopology.Phase	valueOf(int ordinal)
static CacheTopology.Phase	valueOf(String name) Returns the enum constant of this type with the specified name.
static CacheTopology.Phase[]	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

NO_REBALANCE

public static final CacheTopology.Phase NO_REBALANCE

Only currentCH should be set, this works as both readCH and writeCH

TRANSITORY

public static final CacheTopology.Phase TRANSITORY

Used by caches that don't use 4-phase topology change. PendingCH is used for both read and write.

CONFLICT_RESOLUTION

public static final CacheTopology.Phase CONFLICT_RESOLUTION

Interim state between NO_REBALANCE → READ_OLD_WRITE_ALL readCh is set locally using previous Topology (of said node) readCH, whilst writeCH contains all members after merge

READ_OLD_WRITE_ALL

public static final CacheTopology.Phase READ_OLD_WRITE_ALL

Used during state transfer: readCH == currentCH, writeCH = unionCH

READ_ALL_WRITE_ALL

public static final CacheTopology.Phase READ_ALL_WRITE_ALL

Used after state transfer completes: readCH == writeCH = unionCH

READ_NEW_WRITE_ALL

public static final CacheTopology.Phase READ_NEW_WRITE_ALL

Intermediate state that prevents ISPN-5021: readCH == pendingCH, writeCH = unionCH

Method Detail

values

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

Returns:

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

valueOf

public static CacheTopology.Phase 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

isRebalance

public boolean isRebalance()

valueOf

public static CacheTopology.Phase valueOf(int ordinal)