net.sourceforge.vulcan.git.ProcessInvoker.java Source code

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Here is the source code for net.sourceforge.vulcan.git.ProcessInvoker.java

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/*
 * Vulcan Build Manager
 * Copyright (C) 2005-2012 Chris Eldredge
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
package net.sourceforge.vulcan.git;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;

import org.apache.commons.exec.CommandLine;
import org.apache.commons.exec.DefaultExecutor;
import org.apache.commons.exec.ExecuteException;
import org.apache.commons.exec.Executor;
import org.apache.commons.exec.PumpStreamHandler;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class ProcessInvoker implements Invoker {
    private static final Log LOG = LogFactory.getLog(ProcessInvoker.class);

    private String executable;
    private Executor executor = new DefaultExecutor();

    private OutputStream defaultOut = new ByteArrayOutputStream();
    private OutputStream out = defaultOut;
    private OutputStream err;
    private int exitCode;

    public InvocationResult invoke(String command, File workDir, String... args) throws IOException {
        CommandLine cmdLine = new CommandLine(executable);

        cmdLine.addArgument(command);
        cmdLine.addArgument("--noninteractive");
        cmdLine.addArguments(args, false);

        err = new ByteArrayOutputStream();

        executor.setExitValues(new int[] { 0, 1 });
        executor.setWorkingDirectory(workDir);
        executor.setStreamHandler(new MyPumpStreamHandler(out, err));

        LOG.debug("Executing " + cmdLine);

        try {
            exitCode = executor.execute(cmdLine);
            return new InvocationResult(isOutputRedirected() ? null : out.toString(), err.toString(),
                    exitCode == 0);
        } catch (ExecuteException e) {
            exitCode = e.getExitValue();
            throw e;
        }

    }

    private boolean isOutputRedirected() {
        return this.out != this.defaultOut;
    }

    public void setOutputStream(OutputStream stream) {
        out = stream;
    }

    public String getExecutable() {
        return executable;
    }

    public void setExecutable(String executable) {
        this.executable = executable;
    }

    public void setExecutor(Executor executor) {
        this.executor = executor;
    }

    public String getErrorText() {
        return err.toString();
    }

    public String getOutputText() {
        if (isOutputRedirected()) {
            throw new IllegalStateException("output was redirected.");
        }

        return out.toString();
    }

    public int getExitCode() {
        return exitCode;
    }
}

class MyPumpStreamHandler extends PumpStreamHandler {
    public MyPumpStreamHandler(OutputStream out, OutputStream err) {
        super(out, err);
    }

    @Override
    public OutputStream getOut() {
        return super.getOut();
    }

    @Override
    public OutputStream getErr() {
        return super.getErr();
    }
}