com.asual.summer.onejar.OneJarMojo.java Source code

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Here is the source code for com.asual.summer.onejar.OneJarMojo.java

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/*
 * 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 com.asual.summer.onejar;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collection;
import java.util.List;
import java.util.jar.JarInputStream;
import java.util.jar.JarOutputStream;
import java.util.jar.Manifest;
import java.util.zip.ZipEntry;

import org.apache.commons.io.IOUtils;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.factory.ArtifactFactory;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.model.Dependency;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.MavenProjectBuilder;
import org.apache.maven.project.MavenProjectHelper;

/**
 * @goal onejar
 * @phase package
 * @requiresProject
 * @requiresDependencyResolution runtime
 * 
 * @author Rostislav Hristov
 *
 */
@SuppressWarnings("deprecation")
public class OneJarMojo extends AbstractMojo {

    /**
     * @parameter default-value="${localRepository}"
     * @readonly
     */
    private ArtifactRepository localRepository;

    /**
     * @parameter default-value="${project.pluginArtifacts}"
     * @readonly
     */
    private Collection<Artifact> pluginArtifacts;

    /**
     * @parameter default-value="${project.remoteArtifactRepositories}"
     * @readonly
     */
    private List<ArtifactRepository> remoteArtifactRepositories;

    /**
     * @parameter expression="${project.build.directory}"
     * @readonly
     */
    private File buildDirectory;

    /**
     * @parameter expression="${project.build.finalName}.war"
     * @readonly
     */
    private String warName;

    /**
     * @parameter expression="${project.build.finalName}-onejar.jar"
     * @readonly
     */
    private String jarName;

    /**
     * @parameter expression="${project}"
     * @readonly
     */
    private MavenProject project;

    /**
     * @component
     * @readonly
     */
    private MavenProjectHelper projectHelper;

    /**
     * @component
     * @readonly
     */
    private MavenProjectBuilder mavenProjectBuilder;

    /**
     * @component
     * @readonly
     */
    private ArtifactFactory artifactFactory;

    private static String JAR_CLASSPATH = "lib/";
    private static String JAR_MAIN_CLASS = "com.simontuffs.onejar.Boot";
    private static String ONE_JAR_DIST = "one-jar-boot-0.96.jar";
    private static String ONE_JAR_MAIN_CLASS = "com.asual.summer.onejar.OneJarServer";

    public void execute() throws MojoExecutionException {

        JarOutputStream out = null;
        JarInputStream in = null;

        try {

            File jarFile = new File(buildDirectory, jarName);
            File warFile = new File(buildDirectory, warName);

            Manifest manifest = new Manifest(new ByteArrayInputStream("Manifest-Version: 1.0\n".getBytes("UTF-8")));
            manifest.getMainAttributes().putValue("Main-Class", JAR_MAIN_CLASS);
            manifest.getMainAttributes().putValue("One-Jar-Main-Class", ONE_JAR_MAIN_CLASS);

            out = new JarOutputStream(new FileOutputStream(jarFile, false), manifest);
            in = new JarInputStream(getClass().getClassLoader().getResourceAsStream(ONE_JAR_DIST));

            putEntry(out, new FileInputStream(warFile), new ZipEntry(JAR_CLASSPATH + warFile.getName()));

            for (Artifact artifact : pluginArtifacts) {
                if (artifact.getArtifactId().equalsIgnoreCase("summer-onejar")) {
                    artifact.updateVersion(artifact.getVersion(), localRepository);
                    putEntry(out, new FileInputStream(artifact.getFile()),
                            new ZipEntry(JAR_CLASSPATH + artifact.getFile().getName()));
                    MavenProject project = mavenProjectBuilder.buildFromRepository(artifact,
                            remoteArtifactRepositories, localRepository);
                    List<Dependency> dependencies = project.getDependencies();
                    for (Dependency dependency : dependencies) {
                        if (!"provided".equals(dependency.getScope())) {
                            Artifact dependencyArtifact = artifactFactory.createArtifact(dependency.getGroupId(),
                                    dependency.getArtifactId(), dependency.getVersion(), dependency.getScope(),
                                    dependency.getType());
                            dependencyArtifact.updateVersion(dependencyArtifact.getVersion(), localRepository);
                            putEntry(out, new FileInputStream(dependencyArtifact.getFile()),
                                    new ZipEntry(JAR_CLASSPATH + dependencyArtifact.getFile().getName()));
                        }
                    }
                }
            }

            while (true) {
                ZipEntry entry = in.getNextEntry();
                if (entry != null) {
                    putEntry(out, in, entry);
                } else {
                    break;
                }
            }

            projectHelper.attachArtifact(project, "jar", jarFile);

        } catch (Exception e) {
            getLog().error(e.getMessage(), e);
            throw new MojoExecutionException(e.getMessage(), e);
        } finally {
            IOUtils.closeQuietly(out);
            IOUtils.closeQuietly(in);
        }
    }

    private void putEntry(JarOutputStream out, InputStream in, ZipEntry entry) throws IOException {
        out.putNextEntry(entry);
        IOUtils.copy(in, out);
        out.closeEntry();
    }

}