com.mesosphere.sdk.scheduler.recovery.constrain

Interface LaunchConstrainer

All Known Implementing Classes:

AllLaunchConstrainer, TestingLaunchConstrainer, TimedLaunchConstrainer, UnconstrainedLaunchConstrainer

public interface LaunchConstrainer

This interface provides methods which govern and react to Launch Operations. It is sometimes desirable to limit the rate of Launch Operations. In particular may be desirable to limit the rate of Operations which may be destructive in reaction to permanent failures. Notifications regarding launch Operations and desired RecoveryRequirements allow LaunchConstrainers to throttle Launch Operations.

Method Summary

Modifier and Type	Method and Description
boolean	canLaunch(RecoveryType recoveryType) Determines whether the given RecoveryType can be launchHappened right now.
void	launchHappened(LaunchOfferRecommendation recommendation, RecoveryType recoveryType) Invoked every time a task is launchHappened.

Method Detail

launchHappened

void launchHappened(LaunchOfferRecommendation recommendation,
                    RecoveryType recoveryType)

Invoked every time a task is launchHappened.

We take a Operation so that frameworks can specify additional metadata, in order to smooth the launch rate.

Parameters:

recommendation - The OfferRecommendation containing the Launch Operation which occurred

recoveryType - The type of the recovery which has been executed

canLaunch

boolean canLaunch(RecoveryType recoveryType)

Determines whether the given RecoveryType can be launchHappened right now.

Parameters:

recoveryType - The RecoveryType to be examined

Returns:

true if the offer is safe to launch immediately, false if it should wait