com.hazelcast.client.impl.protocol.template

Interface CardinalityEstimatorCodecTemplate

@Since(value="1.3")
public interface CardinalityEstimatorCodecTemplate

Method Summary

Modifier and Type	Method and Description
void	add(String name, long hash) Add a new hash in the estimation set.
Object	estimate(String name) Estimates the cardinality of the aggregation so far.

Method Detail

add

@Since(value="1.3")
void add(String name,
                             long hash)

Add a new hash in the estimation set. This is the method you want to use to feed hash values into the estimator.

Parameters:

name - The name of CardinalityEstimator

hash - 64bit hash code value to add

Since:

1.3

estimate

@Since(value="1.3")
Object estimate(String name)

Estimates the cardinality of the aggregation so far. If it was previously estimated and never invalidated, then the cached version is used.

Parameters:

name - The name of CardinalityEstimator

Returns:

the previous cached estimation or the newly computed one.

Since:

1.3