org.multiverse.transactional
Interface TransactionalReference<E>

All Known Implementing Classes:

DefaultTransactionalReference, TransactionalAbaReference

public interface TransactionalReference<E>

The TransactionalReference is responsible for storing an object reference transactional (so that it can be used in a Transaction.

Timed versions of the getOrAwait methods will be added in the near future.

Author:

Peter Veentjer

Method Summary

E	clear() Clears the ref and returns the old value of the ref (could be null).
E	get() Gets the current stored ref, or null if no ref is stored.
E	getOrAwait() Gets the current stored ref, or waits until a non null reference becomes available.
E	getOrAwaitInterruptibly() Gets the current stored reference, or waits until a non null references becomes available or until it is is Interrupted.
boolean	isNull() Checks if the ref is null.
E	set(E ref) Sets the current ref.

Method Detail

get

E get()

Gets the current stored ref, or null if no ref is stored.

Returns:

the current stored ref, or null if no ref is stored.

getOrAwait

E getOrAwait()

Gets the current stored ref, or waits until a non null reference becomes available. So you will always get a non null ref.

This call is not interruptible, unless the enclosing transaction is configured as interruptible.

Returns:

the current stored reference.

getOrAwaitInterruptibly

E getOrAwaitInterruptibly()
                          throws InterruptedException

Gets the current stored reference, or waits until a non null references becomes available or until it is is Interrupted.

This call is interruptible, unless the enclosing transaction isn't configured as interruptible.

Returns:

the current stored reference.

Throws:

InterruptedException - if the thread is interrupted while waiting on a reference to come available.

set

E set(E ref)

Sets the current ref. The ref is allowed to be null.

Parameters:

ref - the ref to set.

Returns:

the previous ref, which could be null.

clear

E clear()

Clears the ref and returns the old value of the ref (could be null).

Returns:

the old value.

isNull

boolean isNull()

Checks if the ref is null.

Returns:

true if the ref is null, false otherwise.