Package de.aristaflow.ilm.core.runtimeservice

Class MessageDemux

java.lang.Object

de.aristaflow.ilm.core.runtimeservice.MessageDemux

public class MessageDemux
extends Object

This class extends the LocalExecutionMessageNotifier by the means to notify listeners without a reply and get this reply via another route. For instance, SSE does not allow to send data, so the execution message is just notified and the reply is expected via the normal reply method of the (remote) runtime environment. Internally this reply will then be forwarded to the corresponding notifier awaiting the reply synchronously.

Field Summary

Fields

Modifier and Type	Field	Description
protected LocalExecutionMessageNotifier	lemn	The wrapped message notifier.
protected Map<String,Map<Long,CompletableFuture<ReplyMessage<?>>>>	waiting	The futures awaited by server notifications indexed by session ID and message ID.

Constructor Summary

Constructors

Constructor	Description
MessageDemux(LocalExecutionMessageNotifier lemn)	Creates a new execution message notifier handling listeners via the designated notifier.

Method Summary

Modifier and Type	Method	Description
URI[]	getUris()	Gets the URIs of the corresponding LocalExecutionMessageNotifier which is needed to register the listener when starting or resuming via the runtime service.
URI[]	registerListener(SessionToken session, String sessionId, ExecutionMessageNotification emn)
Future<ReplyMessage<?>>	registerNotification(String sessionId, long messageId)	Registers a notification for the designated session and message ID and returns the corresponding future providing the reply message.
boolean	reply(ReplyMessage<?> reply)	Replies to an execution message with the designated reply.
void	unregisterListener(SessionToken session, String sessionId, ExecutionMessageNotification emn)

Methods inherited from class java.lang.Object

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

Field Detail

lemn

protected final LocalExecutionMessageNotifier lemn

The wrapped message notifier.

waiting

protected final Map<String,Map<Long,CompletableFuture<ReplyMessage<?>>>> waiting

The futures awaited by server notifications indexed by session ID and message ID.

Constructor Detail

MessageDemux

public MessageDemux(LocalExecutionMessageNotifier lemn)

Creates a new execution message notifier handling listeners via the designated notifier.

Parameters:

lemn - The notifier for forwarding execution messages for synchronous dispatching to the corresponding ExecutionMessageNotification.

Method Detail

registerNotification

public Future<ReplyMessage<?>> registerNotification(String sessionId,
                                                    long messageId)

Registers a notification for the designated session and message ID and returns the corresponding future providing the reply message.

Parameters:

sessionId - The ID of the execution session for which to forward a message to the listener.

messageId - The ID of the execution messages which to forward to the listener.

Returns:

A future for retrieving the reply message to the corresponding execution message.

reply

public boolean reply(ReplyMessage<?> reply)

Replies to an execution message with the designated reply. This will set the reply in the corresponding future thus signalling the corresponding notifiers waiting for the reply.

Parameters:

reply - the reply for an execution message sent by a notifier.

Returns:

Whether the designated reply has been successfully set in the corresponding future.

getUris

public URI[] getUris()

Gets the URIs of the corresponding LocalExecutionMessageNotifier which is needed to register the listener when starting or resuming via the runtime service.

Returns:

The URIs of the corresponding LocalExecutionMessageNotifier.

See Also:

ADEPT2Service.getURIs()

registerListener

public URI[] registerListener(SessionToken session,
                              String sessionId,
                              ExecutionMessageNotification emn)

See Also:

LocalExecutionMessageNotifier.registerExecutionMessageListener(de.aristaflow.adept2.base.sessionmanagement.SessionToken, String, ExecutionMessageNotification)

unregisterListener

public void unregisterListener(SessionToken session,
                               String sessionId,
                               ExecutionMessageNotification emn)

See Also:

LocalExecutionMessageNotifier.unregisterExecutionMessageListener(de.aristaflow.adept2.base.sessionmanagement.SessionToken, String, ExecutionMessageNotification)