org.apache.flink.streaming.runtime.tasks.mailbox

Interface MailboxDefaultAction.Controller

All Known Implementing Classes:

MailboxProcessor.MailboxController

Enclosing interface:

MailboxDefaultAction

@Internal
public static interface MailboxDefaultAction.Controller

This controller is a feedback interface for the default action to interact with the mailbox execution. In particular, it offers ways to signal that the execution of the default action should be finished or temporarily suspended.

Method Summary

Modifier and Type	Method and Description
void	allActionsCompleted() This method must be called to end the stream task when all actions for the tasks have been performed.
MailboxDefaultAction.Suspension	suspendDefaultAction() Same as suspendDefaultAction(PeriodTimer) but without any associated timer measuring the idle time.
MailboxDefaultAction.Suspension	suspendDefaultAction(PeriodTimer suspensionPeriodTimer) Calling this method signals that the mailbox-thread should (temporarily) stop invoking the default action, e.g. because there is currently no input available.

Method Detail

allActionsCompleted

void allActionsCompleted()

This method must be called to end the stream task when all actions for the tasks have been performed. This method can be invoked from any thread.

suspendDefaultAction

MailboxDefaultAction.Suspension suspendDefaultAction(PeriodTimer suspensionPeriodTimer)

Calling this method signals that the mailbox-thread should (temporarily) stop invoking the default action, e.g. because there is currently no input available. This method must be invoked from the mailbox-thread only!

Parameters:

suspensionPeriodTimer - started (ticking) PeriodTimer that measures how long the default action was suspended/idling. If mailbox loop is busy processing mails, this timer should be paused for the time required to process the mails.

suspendDefaultAction

MailboxDefaultAction.Suspension suspendDefaultAction()

Same as suspendDefaultAction(PeriodTimer) but without any associated timer measuring the idle time.