org.objectweb.fractal.adl.JuliaLauncherMojo Maven / Gradle / Ivy
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Deploy and start a Fractal application using the Julia runtime.
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/**
This library 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 2.1 of the License, or any later version.
This library 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 library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA
Contributor(s):
- Philippe Merle (set the class loader used to obtain the Fractal ADL Factory)
*/
package org.objectweb.fractal.adl;
import java.io.File;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.List;
import java.util.Map;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.project.MavenProject;
import org.objectweb.fractal.api.Component;
import org.objectweb.fractal.api.NoSuchInterfaceException;
import org.objectweb.fractal.api.control.LifeCycleController;
import org.objectweb.fractal.julia.Julia;
import org.objectweb.fractal.util.Fractal;
/**
* Executes the fractaladl Launcher in the current VM with the enclosing project's
* runtime dependencies as classpath + the mojo dependencies.
*
* This plugin lets you specify:
*
* - the ADL file containing the top level component definition
* - the name of the Runnable interface to run on the top level component
* - the factory to use to instantiate the component
* - the backend used by the factory
*
*
*
* Requires the enclosing project (runtime) dependencies
* The compile phase must be / have been run before the MOJO
* Associate the MOJO with the goal run
*
* @author Alessio Pace
*
* @execute phase="compile"
* @requiresDependencyResolution runtime
* @goal run
*/
public class JuliaLauncherMojo extends AbstractMojo {
public final static String BASIC_FACTORY = "org.objectweb.fractal.adl.BasicFactory";
/**
* The fully qualified name of the factory to use (the corresponding .fractal file must be in the classpath).
*
* @parameter expression="org.objectweb.fractal.adl.BasicFactory"
*/
private String factory;
/**
* The fully qualified name of the backend to use (the corresponding .fractal file must be in the classpath).
*
* @parameter expression="org.objectweb.fractal.adl.FractalBackend"
*/
private String backend;
/**
* The fully qualified name of the component definition to load (must be in the classpath).
*
* @parameter
*/
private String definition;
/**
* @parameter expression="r"
*/
private String runnableItf;
/**
* @parameter expression="true"
*/
private boolean daemon;
/**
* A comma separated value of Julia config files.
*
* @parameter
*/
private String juliaConfig;
/**
* The Maven project reference.
*
* @parameter expression="${project}"
* @required
*/
private MavenProject project;
/**
* @parameter expression="${plugin.artifacts}"
* @readonly
*/
//private List pluginDependencies;
public void execute() throws MojoExecutionException {
/* this is the julia-launcher-plugin, so... */
System.setProperty("fractal.provider", Julia.class.getCanonicalName());
// Will be removed in Julia version 2.1.6
//System.setProperty("julia.loader", DynamicLoader.class.getCanonicalName());
if(juliaConfig!=null && juliaConfig.length() > 0)
System.setProperty("julia.config", juliaConfig);
/* get the current MOJO ClassLoader */
ClassLoader initialClassLoader = Thread.currentThread().getContextClassLoader();
getLog().debug("MOJO initial classloader: " + initialClassLoader);
/* get the new ClassLoader */
ClassLoader classLoader = getClassLoader(initialClassLoader);
getLog().debug("MOJO new classloader: " + classLoader);
/*
* this is not technically needed because FractalADL tries to the ClassLoader
* passed with the "classloader" key in the context Map, or falls back on
* the XMLLoader's instance.class.getClassLoader() which is the same ClassLoader
* of the initialClassLoader variable (and which is not enough to load
* resources of the enclosing project)
*/
Thread.currentThread().setContextClassLoader(classLoader);
try {
new Launcher(classLoader, this.daemon).main(new String[]{factory, backend, definition, runnableItf});
} catch(Exception e){
e.printStackTrace();
throw new MojoExecutionException("Unable to launch Fractal application", e);
}
/* set again the initial MOJO ClassLoader */
Thread.currentThread().setContextClassLoader(initialClassLoader);
}
protected ClassLoader getClassLoader(final ClassLoader currentThreadClassLoader) {
try {
//String outputDirectory = project.getBuild().getOutputDirectory();
//URL targetClassesUrl = new File(outputDirectory).toURL();
/* contains the enclosing project dependencies and target/classes */
List classpaths = project.getRuntimeClasspathElements();
/* copy the List of classpaths into an array of URL*/
URL[] classpathsUrls = new URL[classpaths.size()];
for(int i=0; i