Package org.apache.qpid.jms.provider

Class ProviderFuture

java.lang.Object

org.apache.qpid.jms.provider.ProviderFuture

All Implemented Interfaces:

AsyncResult

Direct Known Subclasses:

BalancedProviderFuture, ConservativeProviderFuture, ProgressiveProviderFuture

public abstract class ProviderFuture
extends Object
implements AsyncResult

Asynchronous Provider Future class.

Field Summary

Fields

Modifier and Type	Field	Description
protected static int	COMPLETING
protected ProviderException	error
protected static int	FAILURE
protected static int	INCOMPLETE
protected static AtomicIntegerFieldUpdater<ProviderFuture>	STATE_FIELD_UPDATER
protected static int	SUCCESS
protected ProviderSynchronization	synchronization
protected int	waiting

Constructor Summary

Constructors

Constructor	Description
ProviderFuture()
ProviderFuture(ProviderSynchronization synchronization)

Method Summary

Modifier and Type	Method	Description
protected void	failOnError()
boolean	isComplete()	Returns true if the AsyncResult has completed.
void	onFailure(ProviderException result)	If the operation fails this method is invoked with the Exception that caused the failure.
void	onSuccess()	If the operation succeeds the resulting value produced is set to null and the waiting parties are signaled.
abstract void	sync()	Waits for a response to some Provider requested operation.
abstract boolean	sync(long amount, TimeUnit unit)	Timed wait for a response to a Provider operation.

Methods inherited from class java.lang.Object

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

Field Detail

synchronization

protected final ProviderSynchronization synchronization

INCOMPLETE

protected static final int INCOMPLETE

See Also:

Constant Field Values

COMPLETING

protected static final int COMPLETING

See Also:

Constant Field Values

SUCCESS

protected static final int SUCCESS

See Also:

Constant Field Values

FAILURE

protected static final int FAILURE

See Also:

Constant Field Values

STATE_FIELD_UPDATER

protected static final AtomicIntegerFieldUpdater<ProviderFuture> STATE_FIELD_UPDATER

error

protected ProviderException error

waiting

protected int waiting

Constructor Detail

ProviderFuture

public ProviderFuture()

ProviderFuture

public ProviderFuture(ProviderSynchronization synchronization)

Method Detail

isComplete

public boolean isComplete()

Description copied from interface: AsyncResult

Returns true if the AsyncResult has completed. The task is considered complete regardless if it succeeded or failed.

Specified by:

isComplete in interface AsyncResult

Returns:

returns true if the asynchronous operation has completed.

onFailure

public void onFailure(ProviderException result)

Description copied from interface: AsyncResult

If the operation fails this method is invoked with the Exception that caused the failure.

Specified by:

onFailure in interface AsyncResult

Parameters:

result - The error that resulted in this asynchronous operation failing.

onSuccess

public void onSuccess()

Description copied from interface: AsyncResult

If the operation succeeds the resulting value produced is set to null and the waiting parties are signaled.

Specified by:

onSuccess in interface AsyncResult

sync

public abstract void sync()
                   throws ProviderException

Waits for a response to some Provider requested operation.

Throws:

ProviderException - if an error occurs while waiting for the response.

sync

public abstract boolean sync(long amount,
                             TimeUnit unit)
                      throws ProviderException

Timed wait for a response to a Provider operation.

Parameters:

amount - The amount of time to wait before abandoning the wait.

unit - The unit to use for this wait period.

Returns:

true if the operation succeeded and false if the waiting time elapsed while waiting for the operation to complete.

Throws:

ProviderException - if an error occurs while waiting for the response.

failOnError

protected void failOnError()
                    throws ProviderException

Throws:

ProviderException