com.hazelcast.core

Interface IAtomicReference<E>

All Superinterfaces:

DistributedObject

All Known Subinterfaces:

AsyncAtomicReference<E>

All Known Implementing Classes:

AtomicReferenceProxy

public interface IAtomicReference<E>
extends DistributedObject

IAtomicReference is a redundant and highly available distributed alternative to the java.util.concurrent.atomic.AtomicReference.

Since:

3.2

See Also:

IAtomicLong

Method Summary

Methods

Modifier and Type	Method and Description
void	alter(IFunction<E,E> function) Alters the currently stored reference by applying a function on it.
E	alterAndGet(IFunction<E,E> function) Alters the currently stored reference by applying a function on it and gets the result.
<R> R	apply(IFunction<E,R> function) Applies a function on the value, the actual stored value will not change.
void	clear() Clears the current stored reference.
boolean	compareAndSet(E expect, E update) Atomically sets the value to the given updated value only if the current value == the expected value.
boolean	contains(E value) Checks if the reference contains the value.
E	get() Gets the current value.
E	getAndAlter(IFunction<E,E> function) Alters the currently stored reference by applying a function on it on and gets the old value.
E	getAndSet(E newValue) Gets the old value and sets the new value.
boolean	isNull() Checks if the stored reference is null.
void	set(E newValue) Atomically sets the given value.
E	setAndGet(E update) Deprecated. will be removed from Hazelcast 3.4 since it doesn't really serve a purpose.

Methods inherited from interface com.hazelcast.core.DistributedObject

destroy, getName, getPartitionKey, getServiceName

Method Detail

compareAndSet

boolean compareAndSet(E expect,
                    E update)

Atomically sets the value to the given updated value only if the current value == the expected value.

Parameters:

expect - the expected value

update - the new value

Returns:

true if successful; or false if the actual value was not equal to the expected value.

get

E get()

Gets the current value.

Returns:

the current value

set

void set(E newValue)

Atomically sets the given value.

Parameters:

newValue - the new value

getAndSet

E getAndSet(E newValue)

Gets the old value and sets the new value.

Parameters:

newValue - the new value.

Returns:

the old value.

setAndGet

E setAndGet(E update)

Deprecated. will be removed from Hazelcast 3.4 since it doesn't really serve a purpose.

Sets and gets the value.

Parameters:

update - the new value

Returns:

the new value

isNull

boolean isNull()

Checks if the stored reference is null.

Returns:

true if null, false otherwise.

clear

void clear()

Clears the current stored reference.

contains

boolean contains(E value)

Checks if the reference contains the value.

Parameters:

value - the value to check (is allowed to be null).

Returns:

true if the value is found, false otherwise.

alter

void alter(IFunction<E,E> function)

Alters the currently stored reference by applying a function on it.

Parameters:

function - the function that alters the currently stored reference

Throws:

IllegalArgumentException - if function is null.

alterAndGet

E alterAndGet(IFunction<E,E> function)

Alters the currently stored reference by applying a function on it and gets the result.

Parameters:

function - the function that alters the currently stored reference

Returns:

the new value, the result of the applied function.

Throws:

IllegalArgumentException - if function is null.

getAndAlter

E getAndAlter(IFunction<E,E> function)

Alters the currently stored reference by applying a function on it on and gets the old value.

Parameters:

function - the function that alters the currently stored reference

Returns:

the old value, the value before the function is applied

Throws:

IllegalArgumentException - if function is null.

apply

<R> R apply(IFunction<E,R> function)

Applies a function on the value, the actual stored value will not change.

Parameters:

function - the function applied on the value, the stored value does not change

Returns:

the result of the function application

Throws:

IllegalArgumentException - if function is null.