org.apache.flink.runtime.iterative.convergence.WorksetEmptyConvergenceCriterion Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.flink.runtime.iterative.convergence;
import org.apache.flink.api.common.aggregators.ConvergenceCriterion;
import org.apache.flink.types.LongValue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A workset iteration is by definition converged if no records have been updated in the solutionset.
*/
public class WorksetEmptyConvergenceCriterion implements ConvergenceCriterion {
private static final long serialVersionUID = 1L;
private static final Logger log = LoggerFactory.getLogger(WorksetEmptyConvergenceCriterion.class);
public static final String AGGREGATOR_NAME = "pact.runtime.workset-empty-aggregator";
@Override
public boolean isConverged(int iteration, LongValue value) {
long updatedElements = value.getValue();
if (log.isInfoEnabled()) {
log.info("[" + updatedElements + "] elements updated in the solutionset in iteration [" + iteration + "]");
}
return updatedElements == 0;
}
}