org.apache.flink.streaming.api.windowing.policy

Interface CloneableEvictionPolicy<DATA>

Type Parameters:

DATA - The data type handled by this policy

All Superinterfaces:

Cloneable, EvictionPolicy<DATA>, Serializable

All Known Implementing Classes:

ActiveCloneableEvictionPolicyWrapper, CloneableMultiEvictionPolicy, CountEvictionPolicy, DeltaPolicy, PunctuationPolicy, TimeEvictionPolicy, TumblingEvictionPolicy

public interface CloneableEvictionPolicy<DATA>
extends EvictionPolicy<DATA>, Cloneable

When used in grouped windowing, eviction policies must provide a clone method. Eviction policies get cloned to provide an own instance for each group and respectively each individual element buffer as groups maintain their own buffers with the elements belonging to the respective group. This interface extends EvictionPolicy with such a clone method. It also adds the Java Cloneable interface as flag.

Method Summary

Modifier and Type	Method and Description
CloneableEvictionPolicy<DATA>	clone() This method should return an exact copy of the object it belongs to including the current object state.

Methods inherited from interface org.apache.flink.streaming.api.windowing.policy.EvictionPolicy

notifyEviction

Method Detail

clone

CloneableEvictionPolicy<DATA> clone()

This method should return an exact copy of the object it belongs to including the current object state.

Returns:

a copy of this object