com.bigdata.journal

Enum RunState

java.lang.Object

java.lang.Enum<RunState>

com.bigdata.journal.RunState

All Implemented Interfaces:

Serializable, Comparable<RunState>

public enum RunState
extends Enum<RunState>

Enum of transaction run states.

Version:

$Id$

Author:

Bryan Thompson

Enum Constant Summary

Enum Constants

Enum Constant and Description
Aborted
Active
Committed
Prepared

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isTransitionAllowed(RunState newval) Return true iff a transition is allowable from the current RunState to the proposed RunState.
String	toString()
static RunState	valueOf(String name) Returns the enum constant of this type with the specified name.
static RunState[]	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, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

Active

public static final RunState Active

Prepared

public static final RunState Prepared

Committed

public static final RunState Committed

Aborted

public static final RunState Aborted

Method Detail

values

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

Returns:

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

valueOf

public static RunState 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

toString

public String toString()

Overrides:

toString in class Enum<RunState>

isTransitionAllowed

public boolean isTransitionAllowed(RunState newval)

Return true iff a transition is allowable from the current RunState to the proposed RunState.

Note: Only certain state transitions are allowed. These are: {Active->Prepared, Active->Aborted, Active->Committed; Prepared->Committed, Prepared->Aborted}. Both Committed and Aborted are absorbing states.

Note: A transition to the same state is always allowed.

Parameters:

newval - The proposed RunState.

Returns:

true iff that state transition is allowed.