org.multiverse.transactional.nonblocking
Class DefaultTransactionSelector<K extends TransactionSelectionKey>

java.lang.Object
  org.multiverse.transactional.nonblocking.DefaultTransactionSelector<K>

Type Parameters:

K -

All Implemented Interfaces:

TransactionSelector<K>

public class DefaultTransactionSelector<K extends TransactionSelectionKey>
extends java.lang.Object
implements TransactionSelector<K>

The default TransactionSelector implementation.

Author:

Peter Veentjer.

Constructor Summary

DefaultTransactionSelector()
Creates a new DefaultTransactionSelector with a LinkedBlockingQueue is arrivedTasks queue implementation.

DefaultTransactionSelector(java.util.concurrent.BlockingQueue<K> arrivedTasks)
Creates a new TransactionSelector with the provided pending task queue.

Method Summary

void	close()
void	register(K task) Registers a NonBlockingTaskContext to this TransactionSelector so that it No guarantees are made of the same NonBlockingTaskContext is registered while it already is registered (and not been returned with a select).
K	select() Selects a NonBlockingTaskContext ready for execution or wait until a task comes available.
K	selectNow() Selects a key to use or null if none available.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultTransactionSelector

public DefaultTransactionSelector()

Creates a new DefaultTransactionSelector with a LinkedBlockingQueue is arrivedTasks queue implementation.

DefaultTransactionSelector

public DefaultTransactionSelector(java.util.concurrent.BlockingQueue<K> arrivedTasks)

Creates a new TransactionSelector with the provided pending task queue.

Parameters:

arrivedTasks - the BlockingQueue where the Trans

Throws:

java.lang.NullPointerException - if arrivedTasks is null.

Method Detail

register

public void register(K task)

Description copied from interface: TransactionSelector

Registers a NonBlockingTaskContext to this TransactionSelector so that it

No guarantees are made of the same NonBlockingTaskContext is registered while it already is registered (and not been returned with a select).

Specified by:

register in interface TransactionSelector<K extends TransactionSelectionKey>

select

public K select()
                                         throws java.lang.InterruptedException

Description copied from interface: TransactionSelector

Selects a NonBlockingTaskContext ready for execution or wait until a task comes available.

Once the NonBlockingTaskContext is returned, it needs to be registered again if it wants to participate in another attempt.

Specified by:

select in interface TransactionSelector<K extends TransactionSelectionKey>

Returns:

the NonBlockingTask that is ready for execution.

Throws:

java.lang.InterruptedException - if the thread is interrupted while waiting for a task to come available.

selectNow

public K selectNow()

Description copied from interface: TransactionSelector

Selects a key to use or null if none available.

Specified by:

selectNow in interface TransactionSelector<K extends TransactionSelectionKey>

Returns:

the selected key, or null if none available.

close

public void close()

Specified by:

close in interface TransactionSelector<K extends TransactionSelectionKey>