org.sonarsource.sonarlint.core.container.global.GlobalTempFolderProvider.java Source code

Introduction

Here is the source code for org.sonarsource.sonarlint.core.container.global.GlobalTempFolderProvider.java

Source

/*
 * SonarLint Core - Implementation
 * Copyright (C) 2009-2017 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonarsource.sonarlint.core.container.global;

import java.io.IOException;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.concurrent.TimeUnit;
import org.apache.commons.io.FileUtils;
import org.picocontainer.ComponentLifecycle;
import org.picocontainer.PicoContainer;
import org.picocontainer.injectors.ProviderAdapter;
import org.sonar.api.utils.TempFolder;
import org.sonar.api.utils.internal.DefaultTempFolder;
import org.sonar.api.utils.log.Logger;
import org.sonar.api.utils.log.Loggers;
import org.sonarsource.sonarlint.core.client.api.common.AbstractGlobalConfiguration;

public class GlobalTempFolderProvider extends ProviderAdapter implements ComponentLifecycle<TempFolder> {
    private static final Logger LOG = Loggers.get(GlobalTempFolderProvider.class);
    private static final long CLEAN_MAX_AGE = TimeUnit.DAYS.toMillis(21);
    static final String TMP_NAME_PREFIX = ".sonartmp_";
    private boolean started = false;

    private DefaultTempFolder tempFolder;

    public TempFolder provide(AbstractGlobalConfiguration globalConfiguration) {
        if (tempFolder == null) {

            Path workingPath = globalConfiguration.getWorkDir();
            try {
                cleanTempFolders(workingPath);
            } catch (IOException e) {
                LOG.error(String.format("failed to clean global working directory: %s", workingPath), e);
            }
            Path tempDir = createTempFolder(workingPath);
            tempFolder = new DefaultTempFolder(tempDir.toFile(), true);
        }
        return tempFolder;
    }

    private static Path createTempFolder(Path workingPath) {
        try {
            Files.createDirectories(workingPath);
        } catch (IOException e) {
            throw new IllegalStateException("Failed to create working path: " + workingPath, e);
        }

        try {
            return Files.createTempDirectory(workingPath, TMP_NAME_PREFIX);
        } catch (IOException e) {
            throw new IllegalStateException("Failed to create temporary folder in " + workingPath, e);
        }
    }

    private static void cleanTempFolders(Path path) throws IOException {
        if (Files.exists(path)) {
            try (DirectoryStream<Path> stream = Files.newDirectoryStream(path, new CleanFilter())) {
                for (Path p : stream) {
                    FileUtils.deleteQuietly(p.toFile());
                }
            }
        }
    }

    private static class CleanFilter implements DirectoryStream.Filter<Path> {
        @Override
        public boolean accept(Path path) throws IOException {
            if (!Files.isDirectory(path)) {
                return false;
            }

            if (!path.getFileName().toString().startsWith(TMP_NAME_PREFIX)) {
                return false;
            }

            long threshold = System.currentTimeMillis() - CLEAN_MAX_AGE;

            // we could also check the timestamp in the name, instead
            BasicFileAttributes attrs;

            try {
                attrs = Files.readAttributes(path, BasicFileAttributes.class);
            } catch (IOException ioe) {
                LOG.error(String.format("Couldn't read file attributes for %s : ", path), ioe);
                return false;
            }

            long creationTime = attrs.creationTime().toMillis();
            return creationTime < threshold;
        }
    }

    @Override
    public void start(PicoContainer container) {
        started = true;
    }

    @Override
    public void stop(PicoContainer container) {
        if (tempFolder != null) {
            tempFolder.stop();
        }
    }

    @Override
    public void dispose(PicoContainer container) {
        // nothing to do
    }

    @Override
    public boolean componentHasLifecycle() {
        return true;
    }

    @Override
    public boolean isStarted() {
        return started;
    }
}