org.apache.flink.runtime.executiongraph.restart

Class FixedDelayRestartStrategy

java.lang.Object

org.apache.flink.runtime.executiongraph.restart.FixedDelayRestartStrategy

All Implemented Interfaces:

RestartStrategy

public class FixedDelayRestartStrategy
extends Object
implements RestartStrategy

Restart strategy which tries to restart the given ExecutionGraph a fixed number of times with a fixed time delay in between.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FixedDelayRestartStrategy.FixedDelayRestartStrategyFactory

Constructor Summary

Constructors

Constructor and Description
FixedDelayRestartStrategy(int maxNumberRestartAttempts, long delayBetweenRestartAttempts)

Method Summary

Modifier and Type	Method and Description
boolean	canRestart() True if the restart strategy can be applied to restart the ExecutionGraph.
static FixedDelayRestartStrategy.FixedDelayRestartStrategyFactory	createFactory(org.apache.flink.configuration.Configuration configuration) Creates a FixedDelayRestartStrategy from the given Configuration.
int	getCurrentRestartAttempt()
CompletableFuture<Void>	restart(RestartCallback restarter, ScheduledExecutor executor) Called by the ExecutionGraph to eventually trigger a full recovery.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedDelayRestartStrategy

public FixedDelayRestartStrategy(int maxNumberRestartAttempts,
                                 long delayBetweenRestartAttempts)

Method Detail

getCurrentRestartAttempt

public int getCurrentRestartAttempt()

canRestart

public boolean canRestart()

Description copied from interface: RestartStrategy

True if the restart strategy can be applied to restart the ExecutionGraph.

Specified by:

canRestart in interface RestartStrategy

Returns:

true if restart is possible, otherwise false

restart

public CompletableFuture<Void> restart(RestartCallback restarter,
                                       ScheduledExecutor executor)

Description copied from interface: RestartStrategy

Called by the ExecutionGraph to eventually trigger a full recovery. The recovery must be triggered on the given callback object, and may be delayed with the help of the given scheduled executor.

The thread that calls this method is not supposed to block/sleep.

Specified by:

restart in interface RestartStrategy

Parameters:

restarter - The hook to restart the ExecutionGraph

executor - An scheduled executor to delay the restart

Returns:

A CompletableFuture that will be completed when the restarting process is done.

createFactory

public static FixedDelayRestartStrategy.FixedDelayRestartStrategyFactory createFactory(org.apache.flink.configuration.Configuration configuration)
                                                                                throws Exception

Creates a FixedDelayRestartStrategy from the given Configuration.

Parameters:

configuration - Configuration containing the parameter values for the restart strategy

Returns:

Initialized instance of FixedDelayRestartStrategy

Throws:

Exception

toString

public String toString()

Overrides:

toString in class Object