it.polimi.diceH2020.SPACE4CloudWS.solvers.PerformanceSolver.java Source code

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Here is the source code for it.polimi.diceH2020.SPACE4CloudWS.solvers.PerformanceSolver.java

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/*
Copyright 2016-2017 Eugenio Gianniti
Copyright 2016 Michele Ciavotta
Copyright 2017 Marco Lattuada
    
Licensed 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 it.polimi.diceH2020.SPACE4CloudWS.solvers;

import it.polimi.diceH2020.SPACE4Cloud.shared.settings.Technology;
import it.polimi.diceH2020.SPACE4Cloud.shared.solution.SolutionPerJob;
import it.polimi.diceH2020.SPACE4CloudWS.core.DataProcessor;

import java.io.*;
import java.util.*;
import java.util.function.BiConsumer;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Predicate;
import lombok.NonNull;
import lombok.Setter;
import org.apache.commons.lang3.tuple.Pair;
import org.springframework.beans.factory.annotation.Autowired;

public abstract class PerformanceSolver extends AbstractSolver {

    @Setter(onMethod = @__(@Autowired))
    protected DataProcessor dataProcessor;

    protected List<File> retrieveInputFiles(@NonNull SolutionPerJob solutionPerJob, String extension) {
        String solutionID = solutionPerJob.getParentID();
        String spjID = solutionPerJob.getId();
        String provider = dataProcessor.getProviderName();
        String typeVM = solutionPerJob.getTypeVMselected().getId();
        return dataProcessor.retrieveInputFiles(extension, solutionID, spjID, provider, typeVM);
    }

    public Optional<Double> evaluate(@NonNull SolutionPerJob solPerJob) {
        Optional<Double> returnValue = Optional.of(solPerJob.getThroughput());

        if (solPerJob.getChanged()) {
            try {
                putRemoteSubDirectory(solPerJob);
                Pair<List<File>, List<File>> pFiles = createWorkingFiles(solPerJob);
                String jobID = solPerJob.getId();
                String directory = retrieveRemoteSubDirectory(solPerJob);
                Pair<Double, Boolean> result = run(pFiles, "class" + jobID, directory);
                delete(pFiles.getLeft());
                if (connSettings.isCleanRemote())
                    cleanRemoteSubDirectory(directory);
                solPerJob.setError(result.getRight());
                returnValue = Optional.of(result.getLeft());
                removeRemoteSubDirectory(solPerJob);
            } catch (Exception e) {
                logger.error("Error in SPJ evaluation", e);
                solPerJob.setError(Boolean.TRUE);
                returnValue = Optional.empty();
            }
        }

        return returnValue;
    }

    public void setAccuracy(double accuracy) {
        connSettings.setAccuracy(accuracy);
    }

    public Predicate<Double> feasibilityCheck(SolutionPerJob solutionPerJob, Technology technology) {
        return R -> R <= solutionPerJob.getJob().getD();
    }

    /**
     * Prepare the working files needed for a subsequent call to {@link #run(Pair, String, String) run}.
     * @param solPerJob partial solution for the class of interest.
     * @return a Pair suitable for {@link #run(Pair, String, String) run}.
     * @throws IOException if creating or writing these files fails.
     */
    protected abstract Pair<List<File>, List<File>> createWorkingFiles(SolutionPerJob solPerJob) throws IOException;

    /**
     * Execute the model on the remote server.
     * @param pFiles the first List contains the main model files, the second one allows for providing
     *               also replayer files.
     * @param remoteName is the human readable name presented in the logs.
     * @param remoteDirectory is the path where the solver should work remotely.
     * @return a Pair containing the value obtained via the solver and a Boolean that is set to true
     *         in case of failure.
     * @throws Exception in case of problems.
     */
    protected abstract Pair<Double, Boolean> run(Pair<List<File>, List<File>> pFiles, String remoteName,
            String remoteDirectory) throws Exception;

    public abstract Function<Double, Double> transformationFromSolverResult(SolutionPerJob solutionPerJob,
            Technology technology);

    public abstract BiConsumer<SolutionPerJob, Double> initialResultSaver(Technology technology);
}