org.sonar.plugins.groovyjacoco.jacoco.JaCoCoAgentDownloader.java Source code

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Here is the source code for org.sonar.plugins.groovyjacoco.jacoco.JaCoCoAgentDownloader.java

Source

/*
 * Sonar Groovy Jacoco
 * Copyright (C) 2010 SonarSource
 * dev@sonar.codehaus.org
 *
 * 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  02
 */
package org.sonar.plugins.groovyjacoco.jacoco;

import java.io.File;
import java.io.IOException;

import org.apache.commons.io.FileUtils;
import org.jacoco.agent.AgentJar;
import org.jacoco.core.JaCoCo;
import org.sonar.api.BatchExtension;
import org.sonar.api.utils.SonarException;

public class JaCoCoAgentDownloader implements BatchExtension {

    /**
     * Dirty hack, but it allows to extract agent only once during Sonar analyzes for multi-module project.
     */
    private static File agentJarFile;

    public JaCoCoAgentDownloader() {
    }

    public synchronized File getAgentJarFile() {
        if (agentJarFile == null) {
            agentJarFile = extractAgent();
        }
        return agentJarFile;
    }

    private File extractAgent() {
        try {
            File agent = File.createTempFile("jacocoagent", ".jar");
            AgentJar.extractTo(agent);
            // TODO evil method
            FileUtils.forceDeleteOnExit(agent);
            JaCoCoUtils.LOG.info("JaCoCo agent (version " + JaCoCo.VERSION + ") extracted: {}", agent);
            return agent;
        } catch (IOException e) {
            throw new SonarException(e);
        }
    }
}