org.sonarsource.sonarlint.core.plugin.DefaultPluginJarExploder.java Source code

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Here is the source code for org.sonarsource.sonarlint.core.plugin.DefaultPluginJarExploder.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.plugin;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileLock;
import java.nio.file.Path;
import org.apache.commons.io.FileUtils;
import org.sonar.api.utils.ZipUtils;
import org.sonarsource.api.sonarlint.SonarLintSide;
import org.sonarsource.sonarlint.core.plugin.cache.PluginCache;

@SonarLintSide
public class DefaultPluginJarExploder extends PluginJarExploder {

    private final PluginCache fileCache;

    public DefaultPluginJarExploder(PluginCache fileCache) {
        this.fileCache = fileCache;
    }

    @Override
    public ExplodedPlugin explode(PluginInfo info) {
        try {
            File dir = unzipFile(info.getNonNullJarFile());
            return explodeFromUnzippedDir(info.getKey(), info.getNonNullJarFile(), dir);
        } catch (Exception e) {
            throw new IllegalStateException(String.format("Fail to open plugin [%s]: %s", info.getKey(),
                    info.getNonNullJarFile().getAbsolutePath()), e);
        }
    }

    private File unzipFile(File cachedFile) throws IOException {
        String filename = cachedFile.getName();
        File destDir = new File(cachedFile.getParentFile(), filename + "_unzip");
        if (!destDir.exists()) {
            File lockFile = new File(cachedFile.getParentFile(), filename + "_unzip.lock");
            FileOutputStream out = new FileOutputStream(lockFile);
            try {
                FileLock lock = out.getChannel().lock();
                try {
                    // Recheck in case of concurrent processes
                    if (!destDir.exists()) {
                        Path tempDir = fileCache.createTempDir();
                        ZipUtils.unzip(cachedFile, tempDir.toFile(), newLibFilter());
                        FileUtils.moveDirectory(tempDir.toFile(), destDir);
                    }
                } finally {
                    lock.release();
                }
            } finally {
                out.close();
                FileUtils.deleteQuietly(lockFile);
            }
        }
        return destDir;
    }
}