org.apache.beam.sdk.io.gcp.spanner.changestreams.restriction

Class RestrictionInterrupter<T>

java.lang.Object

org.apache.beam.sdk.io.gcp.spanner.changestreams.restriction.RestrictionInterrupter<T>

public class RestrictionInterrupter<T>
extends java.lang.Object

An interrupter for restriction tracker of type T.

Method Summary

Modifier and Type	Method and Description
boolean	tryInterrupt(T position) Returns true if the restriction tracker should be interrupted in claiming new positions.
static <T> RestrictionInterrupter<T>	withSoftTimeout(Duration timeout) Sets a soft timeout from now for processing new positions.

Methods inherited from class java.lang.Object

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

Method Detail

withSoftTimeout

public static <T> RestrictionInterrupter<T> withSoftTimeout(Duration timeout)

Sets a soft timeout from now for processing new positions. After the timeout the tryInterrupt will start returning true indicating an early exit from processing.

tryInterrupt

public boolean tryInterrupt(T position)

Returns true if the restriction tracker should be interrupted in claiming new positions.

1. If soft deadline hasn't been reached always returns false.
2. If soft deadline has been reached but we haven't processed any positions returns false.
3. If soft deadline has been reached but the new position is the same as the last attempted position returns false.
4. If soft deadline has been reached and the new position differs from the last attempted position returns true.

Returns:

true if the position processing should continue, false if the soft deadline has been reached and we have fully processed the previous position.