| /* |
| * 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.ignite.ml.genetic; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import org.apache.ignite.Ignite; |
| import org.apache.ignite.IgniteCache; |
| import org.apache.ignite.IgniteException; |
| import org.apache.ignite.IgniteLogger; |
| import org.apache.ignite.compute.ComputeJobAdapter; |
| import org.apache.ignite.ml.genetic.parameter.GAGridConstants; |
| import org.apache.ignite.resources.IgniteInstanceResource; |
| import org.apache.ignite.resources.LoggerResource; |
| import org.apache.ignite.transactions.Transaction; |
| |
| /** |
| * Responsible for performing fitness evaluation on an individual chromosome |
| */ |
| public class FitnessJob extends ComputeJobAdapter { |
| /** |
| * Chromosome primary Key |
| */ |
| private Long key; |
| |
| /** Ignite instance */ |
| @IgniteInstanceResource |
| private Ignite ignite; |
| |
| /** Ignite logger */ |
| @LoggerResource |
| private IgniteLogger log; |
| |
| /** IFitnessFunction */ |
| private IFitnessFunction fitnessFunction; |
| |
| /** |
| * @param key Chromosome primary Key |
| * @param fitnessFunction Fitness function defined by developer |
| */ |
| public FitnessJob(Long key, IFitnessFunction fitnessFunction) { |
| this.key = key; |
| this.fitnessFunction = fitnessFunction; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public Double execute() throws IgniteException { |
| |
| IgniteCache<Long, Chromosome> populationCache = ignite.cache(GAGridConstants.POPULATION_CACHE); |
| |
| IgniteCache<Long, Gene> geneCache = ignite.cache(GAGridConstants.GENE_CACHE); |
| |
| Chromosome chromosome = populationCache.localPeek(key); |
| |
| long[] geneKeys = chromosome.getGenes(); |
| |
| List<Gene> genes = new ArrayList<>(); |
| |
| for (int i = 0; i < geneKeys.length; i++) { |
| long aKey = geneKeys[i]; |
| Gene aGene = geneCache.localPeek(aKey); |
| genes.add(aGene); |
| } |
| |
| Double val = fitnessFunction.evaluate(genes); |
| |
| chromosome.setFitnessScore(val); |
| |
| Transaction tx = ignite.transactions().txStart(); |
| |
| populationCache.put(chromosome.id(), chromosome); |
| |
| tx.commit(); |
| |
| return val; |
| } |
| |
| } |