net.imadz.lifecycle.maven.LifecycleStaticWeaver Maven / Gradle / Ivy

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Lifecycle Weaver statically weaves application byte code at post compile time. After woven by this plugin, runtime bytecode manipulation won't be necessary, so the JVM argument -javaagent must not be specified with certain Lifecycle-version.jar any more.
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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright (c) 2013-2020 Madz. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License"). You
 * may not use this file except in compliance with the License. You can
 * obtain a copy of the License at
 * https://raw.github.com/zhongdj/Lifecycle-StaticWeaver-maven-plugin/master/License.txt
 * . See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 * 
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 * 
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license." If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above. However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
package net.imadz.lifecycle.maven;

import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.List;

/**
 * @goal StaticWeave
 * @phase process-classes
 * @configurator include-project-dependencies
 * @requiresDependencyResolution compile+runtime
 * @requiresProject false
 */
public class LifecycleStaticWeaver extends AbstractMojo {

    /**
     * @parameter expression="${project.build.directory}"
     */
    private String buildDir;
    /**
     * @parameter expression="${lifecycle.path}"
     */
    private String lifecyclePath;
    /**
     * @parameter expression="${project.runtimeClasspathElements}"
     */
    private List runtimeClasspathElements;

    public void execute() throws MojoExecutionException, MojoFailureException {
        getLog().info(new File("./").getAbsolutePath());
        final String separator;
        if ( File.separatorChar == '\\' ) {
            separator = "\\";
        } else {
            separator = File.separator;
        }
        final String targetClassesFolder = buildDir + separator + "classes";
        getLog().info(targetClassesFolder);
        getLog().info(lifecyclePath);
        final StringBuffer classpath = new StringBuffer(".:");
        for ( String element : runtimeClasspathElements ) {
            classpath.append(element).append(":");
        }
        classpath.append(targetClassesFolder).append(":");
        final File lifecycleJar = new File(lifecyclePath);
        classpath.append(lifecycleJar);
        getLog().info(classpath);
        String cmd = "java -cp " + classpath + " -javaagent:" + lifecyclePath + " -Dnet.imadz.bcel.save.original=true" + " "
            + "net.imadz.lifecycle.StaticWeaver " + targetClassesFolder;
        getLog().info(cmd);
        BufferedReader reader = null;
        Process exec = null;
        try {
            exec = Runtime.getRuntime().exec(cmd);
            InputStream errorStream = exec.getErrorStream();
            reader = new BufferedReader(new InputStreamReader(errorStream));
            String line = null;
            while ( null != ( line = reader.readLine() ) ) {
                getLog().info(line);
            }
            while ( isAlive(exec) ) {
                Thread.sleep(500);
            }
            if (  exec.exitValue() > 0 ) {
                throw new IllegalStateException("Lifecycle Cannot Compile.");
            }
        } catch ( IOException e ) {
            getLog().error(e);
        } catch ( InterruptedException e ) {
            e.printStackTrace();
        } finally {
            if ( null != reader ) {
                try {
                    reader.close();
                } catch ( IOException e ) {
                }
            }
            if ( null != exec ) {
                exec.destroy();
            }
        }
    }

    private Boolean isAlive(Process exec) {
        try {
             exec.exitValue();
            return false;
        } catch (Throwable t) {
            return true;
        }

    }
}