Ant example source code file (ForkingSunRmic.java)

This example Ant source code file (ForkingSunRmic.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Ant tags/keywords

buildexception, buildexception, commandline, error, execute, execute, forkingsunrmic, io, ioexception, logstreamhandler, project, rmic, rmic, string, string

The ForkingSunRmic.java source code

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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 org.apache.tools.ant.taskdefs.rmic;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.util.JavaEnvUtils;
import org.apache.tools.ant.taskdefs.Rmic;
import org.apache.tools.ant.taskdefs.Execute;
import org.apache.tools.ant.taskdefs.LogStreamHandler;
import org.apache.tools.ant.types.Commandline;

import java.io.IOException;

/**
 * This is an extension of the sun rmic compiler, which forks rather than
 * executes it inline. Why so? Because rmic is dog slow, but if you fork the
 * compiler you can have multiple copies compiling different bits of your project
 * at the same time. Which, on a multi-cpu system results in significant speedups.
 *
 * Also, Java1.6 behaves oddly with -XNew, so we switch it on here if needed.
 * @since ant1.7
 */
public class ForkingSunRmic extends DefaultRmicAdapter {

    /**
     * the name of this adapter for users to select
     */
    public static final String COMPILER_NAME = "forking";

    /**
     * exec by creating a new command
     * @return true if the command ran successfully
     * @throws BuildException on error
     */
    public boolean execute() throws BuildException {
        Rmic owner = getRmic();
        Commandline cmd = setupRmicCommand();
        Project project = owner.getProject();
        //rely on RMIC being on the path
        cmd.setExecutable(JavaEnvUtils.getJdkExecutable(getExecutableName()));

        //set up the args
        String[] args = cmd.getCommandline();

        try {
            Execute exe = new Execute(new LogStreamHandler(owner,
                    Project.MSG_INFO,
                    Project.MSG_WARN));
            exe.setAntRun(project);
            exe.setWorkingDirectory(project.getBaseDir());
            exe.setCommandline(args);
            exe.execute();
            return !exe.isFailure();
        } catch (IOException exception) {
            throw new BuildException("Error running " + getExecutableName()
                    + " -maybe it is not on the path", exception);
        }
    }

    /**
     * Override point.
     * @return the executable name.
     */
    protected String getExecutableName() {
        return SunRmic.RMIC_EXECUTABLE;
    }
}