| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| 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<LongValue> { |
| |
| 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; |
| } |
| } |