Package jadex.commons.future

Class SubscriptionIntermediateFuture<E>

java.lang.Object

jadex.commons.future.Future<java.util.Collection<E>>

jadex.commons.future.IntermediateFuture<E>

jadex.commons.future.TerminableIntermediateFuture<E>

jadex.commons.future.SubscriptionIntermediateFuture<E>

All Implemented Interfaces:

IBackwardCommandFuture, IForwardCommandFuture, IFuture<java.util.Collection<E>>, IIntermediateFuture<E>, ISubscriptionIntermediateFuture<E>, ITerminableFuture<java.util.Collection<E>>, ITerminableIntermediateFuture<E>

Direct Known Subclasses:

PullSubscriptionIntermediateFuture

public class SubscriptionIntermediateFuture<E>
extends TerminableIntermediateFuture<E>
implements ISubscriptionIntermediateFuture<E>

Implementation of the subscription intermediate future.

Nested Class Summary

Nested classes/interfaces inherited from interface jadex.commons.future.IForwardCommandFuture

IForwardCommandFuture.Type

Field Summary

Fields

Modifier and Type	Field	Description
protected java.util.Map<java.lang.Thread,java.util.List<E>>	ownresults	The local results for a single thread.
protected int	resultssize	The number of results.
protected boolean	storeforfirst	Flag if results should be stored till first listener is added.

Fields inherited from class jadex.commons.future.TerminableIntermediateFuture

bcommands, terminate

Fields inherited from class jadex.commons.future.IntermediateFuture

icallers, indices, intermediate, maxresultcnt, notcommand, results

Fields inherited from class jadex.commons.future.Future

CALLER_QUEUED, CALLER_RESUMED, CALLER_SUSPENDED, callers, creation, DEBUG, exception, first, listeners, NO_STACK_COMPACTION, NONE, NOTIFICATIONS, notificount, result, resultavailable, undone, UNSET

Fields inherited from interface jadex.commons.future.IFuture

DONE, FALSE, TRUE

Fields inherited from interface jadex.commons.future.IIntermediateFuture

DONE

Constructor Summary

Constructors

Constructor	Description
SubscriptionIntermediateFuture()	Create a new future.
SubscriptionIntermediateFuture(ITerminationCommand terminate)	Create a new future.
SubscriptionIntermediateFuture(ITerminationCommand terminate, boolean storeforfirst)	Create a new future.
SubscriptionIntermediateFuture(java.lang.Exception exception)	Create a future that is already done (failed).

Method Summary

Modifier and Type	Method	Description
void	addQuietListener(IResultListener<java.util.Collection<E>> listener)	Add a listener which is only informed about new results, i.e.
void	addResultListener(IResultListener<java.util.Collection<E>> listener)	Add a result listener.
protected E	doGetNextIntermediateResult(int index, long timeout, boolean realtime)	Perform the get without increasing the index.
java.util.Collection<E>	getIntermediateResults()	Get the intermediate results that are available.
E	getNextIntermediateResult(long timeout, boolean realtime)	Iterate over the intermediate results in a blocking fashion.
protected int	getResultCount()	Get the number of results already collected.
boolean	hasNextIntermediateResult(long timeout, boolean realtime)	Check if there are more results for iteration for the given caller.
void	setMaxResultCount(int max)	Unsupported for subscriptions.
protected void	storeResult(E result, boolean scheduled)	Add a result.

Methods inherited from class jadex.commons.future.TerminableIntermediateFuture

addBackwardCommand, getTerminationCommand, removeBackwardCommand, sendBackwardCommand, setTerminationCommand, terminate, terminate

Methods inherited from class jadex.commons.future.IntermediateFuture

addIntermediateResult, addIntermediateResultIfUndone, addIntermediateResultListener, catchErr, doAddIntermediateResult, doSetException, doSetFinished, doSetResult, finished, flatMapAsync, getNextIntermediateResult, getNextIntermediateResult, getNotificationCommand, hasNextIntermediateResult, mapAsync, mapAsync, max, next, notifyIntermediateResult, resume, resumeIntermediate, scheduleMaxNotification, setFinished, setFinishedIfUndone

Methods inherited from class jadex.commons.future.Future

abortGet, catchErr, catchErr, delegate, doAddResultListener, doStartScheduledNotifications, executeNotification, get, get, get, get, get, getEmptyFuture, getException, getFuture, hasResultListener, isDone, scheduleNotification, scheduleNotification, sendForwardCommand, setException, setExceptionIfUndone, setResult, setResultIfUndone, startScheduledNotifications, then, thenAccept, thenAccept, thenApply, thenApply, thenCombine, thenCompose, thenCompose

Methods inherited from class java.lang.Object

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

Methods inherited from interface jadex.commons.future.IBackwardCommandFuture

sendBackwardCommand

Methods inherited from interface jadex.commons.future.IFuture

catchErr, catchErr, catchErr, delegate, get, get, get, get, get, getException, isDone, then, thenApply, thenApply, thenCompose, thenCompose

Methods inherited from interface jadex.commons.future.IIntermediateFuture

finished, flatMapAsync, getNextIntermediateResult, hasNextIntermediateResult, mapAsync, mapAsync, max, next

Methods inherited from interface jadex.commons.future.ITerminableFuture

terminate, terminate

Field Detail

ownresults

protected java.util.Map<java.lang.Thread,java.util.List<E>> ownresults

The local results for a single thread.

storeforfirst

protected boolean storeforfirst

Flag if results should be stored till first listener is added.

resultssize

protected int resultssize

The number of results.

Constructor Detail

SubscriptionIntermediateFuture

public SubscriptionIntermediateFuture()

Create a new future.

SubscriptionIntermediateFuture

public SubscriptionIntermediateFuture(java.lang.Exception exception)

Create a future that is already done (failed).

Parameters:

exception - The exception.

SubscriptionIntermediateFuture

public SubscriptionIntermediateFuture(ITerminationCommand terminate)

Create a new future.

Parameters:

terminate - The code to be executed in case of termination.

SubscriptionIntermediateFuture

public SubscriptionIntermediateFuture(ITerminationCommand terminate,
                                      boolean storeforfirst)

Create a new future.

Parameters:

terminate - The code to be executed in case of termination.

Method Detail

setMaxResultCount

public void setMaxResultCount(int max)

Unsupported for subscriptions.

Overrides:

setMaxResultCount in class IntermediateFuture<E>

Parameters:

max - The maximum number of results.

storeResult

protected void storeResult(E result,
                           boolean scheduled)

Add a result.

Overrides:

storeResult in class IntermediateFuture<E>

Parameters:

result - The result.

scheduled - True, if any listener notification has been scheduled for this result. (used for subscription futures to check for lost values)

getResultCount

protected int getResultCount()

Get the number of results already collected.

Overrides:

getResultCount in class IntermediateFuture<E>

Returns:

The number of results.

addQuietListener

public void addQuietListener(IResultListener<java.util.Collection<E>> listener)

Add a listener which is only informed about new results, i.e. the initial results are not posted to this listener, even if it is the first listener to be added to this future.

Specified by:

addQuietListener in interface ISubscriptionIntermediateFuture<E>

addResultListener

public void addResultListener(IResultListener<java.util.Collection<E>> listener)

Add a result listener.

Specified by:

addResultListener in interface IFuture<E>

Overrides:

addResultListener in class IntermediateFuture<E>

Parameters:

listsner - The listener.

getIntermediateResults

public java.util.Collection<E> getIntermediateResults()

Get the intermediate results that are available. Note: The semantics of this method is different to the normal intermediate future due to the fire-and-forget-semantics!

Specified by:

getIntermediateResults in interface IIntermediateFuture<E>

Specified by:

getIntermediateResults in interface ISubscriptionIntermediateFuture<E>

Overrides:

getIntermediateResults in class IntermediateFuture<E>

Returns:

1)

getNextIntermediateResult

public E getNextIntermediateResult(long timeout,
                                   boolean realtime)

Iterate over the intermediate results in a blocking fashion. Manages results independently for different callers, i.e. when called from different threads, each thread receives all intermediate results. The operation is guaranteed to be non-blocking, if hasNextIntermediateResult() has returned true before for the same caller. Otherwise the caller is blocked until a result is available or the future is finished.

Specified by:

getNextIntermediateResult in interface IIntermediateFuture<E>

Overrides:

getNextIntermediateResult in class IntermediateFuture<E>

Parameters:

timeout - The timeout in millis.

realtime - Flag, if wait should be realtime (in constrast to simulation time).

Returns:

The next intermediate result.

hasNextIntermediateResult

public boolean hasNextIntermediateResult(long timeout,
                                         boolean realtime)

Check if there are more results for iteration for the given caller. If there are currently no unprocessed results and future is not yet finished, the caller is blocked until either new results are available and true is returned or the future is finished, thus returning false.

Specified by:

hasNextIntermediateResult in interface IIntermediateFuture<E>

Overrides:

hasNextIntermediateResult in class IntermediateFuture<E>

Parameters:

timeout - The timeout in millis.

realtime - Flag, if wait should be realtime (in constrast to simulation time).

Returns:

True, when there are more intermediate results for the caller.

doGetNextIntermediateResult

protected E doGetNextIntermediateResult(int index,
                                        long timeout,
                                        boolean realtime)

Perform the get without increasing the index.

Overrides:

doGetNextIntermediateResult in class IntermediateFuture<E>