Example usage for org.apache.commons.exec Executor execute

Introduction

In this page you can find the example usage for org.apache.commons.exec Executor execute.

Prototype

void execute(CommandLine command, ExecuteResultHandler handler) throws ExecuteException, IOException;

Source Link

Document

Methods for starting asynchronous execution.

Usage

From source file:org.openhab.io.net.exec.ExecUtil.java

/**
 * <p>//w ww  . jav  a  2s.c  om
 * Executes <code>commandLine</code>. Sometimes (especially observed on
 * MacOS) the commandLine isn't executed properly. In that cases another
 * exec-method is to be used. To accomplish this please use the special
 * delimiter '<code>@@</code>'. If <code>commandLine</code> contains this
 * delimiter it is split into a String[] array and the special exec-method
 * is used.
 * </p>
 * <p>
 * A possible {@link IOException} gets logged but no further processing is
 * done.
 * </p>
 * 
 * @param commandLine
 *            the command line to execute
 * @param timeout
 *            timeout for execution in milliseconds
 * @return response data from executed command line
 */
public static String executeCommandLineAndWaitResponse(String commandLine, int timeout) {
    String retval = null;

    CommandLine cmdLine = null;

    if (commandLine.contains(CMD_LINE_DELIMITER)) {
        String[] cmdArray = commandLine.split(CMD_LINE_DELIMITER);
        cmdLine = new CommandLine(cmdArray[0]);

        for (int i = 1; i < cmdArray.length; i++) {
            cmdLine.addArgument(cmdArray[i], false);
        }
    } else {
        cmdLine = CommandLine.parse(commandLine);
    }

    DefaultExecuteResultHandler resultHandler = new DefaultExecuteResultHandler();

    ExecuteWatchdog watchdog = new ExecuteWatchdog(timeout);
    Executor executor = new DefaultExecutor();

    ByteArrayOutputStream stdout = new ByteArrayOutputStream();
    PumpStreamHandler streamHandler = new PumpStreamHandler(stdout);

    executor.setExitValue(1);
    executor.setStreamHandler(streamHandler);
    executor.setWatchdog(watchdog);

    try {
        executor.execute(cmdLine, resultHandler);
        logger.debug("executed commandLine '{}'", commandLine);
    } catch (ExecuteException e) {
        logger.error("couldn't execute commandLine '" + commandLine + "'", e);
    } catch (IOException e) {
        logger.error("couldn't execute commandLine '" + commandLine + "'", e);
    }

    // some time later the result handler callback was invoked so we
    // can safely request the exit code
    try {
        resultHandler.waitFor();
        int exitCode = resultHandler.getExitValue();
        retval = StringUtils.chomp(stdout.toString());
        if (resultHandler.getException() != null) {
            logger.warn(resultHandler.getException().getMessage());
        } else {
            logger.debug("exit code '{}', result '{}'", exitCode, retval);
        }

    } catch (InterruptedException e) {
        logger.error("Timeout occured when executing commandLine '" + commandLine + "'", e);
    }

    return retval;
}

From source file:org.xdi.util.process.ProcessHelper.java

/**
 * //from   w  w w  . j a v a 2  s .  c  om
 * @param printJobTimeout
 *            the printJobTimeout (ms) before the watchdog terminates the
 *            print process
 * @param printInBackground
 *            printing done in the background or blocking
 * @param streamHandler
 * @return a print result handler (implementing a future)
 * @throws IOException
 *             the test failed
 */
public static PrintResultHandler executeProgram(CommandLine commandLine, String workingDirectory,
        long printJobTimeout, boolean printInBackground, int successExitValue,
        ExecuteStreamHandler streamHandler) throws IOException {
    ExecuteWatchdog watchdog = null;
    PrintResultHandler resultHandler;

    // Create the executor and consider the successExitValue as success
    Executor executor = new DefaultExecutor();
    executor.setExitValue(successExitValue);

    if (StringHelper.isNotEmpty(workingDirectory)) {
        executor.setWorkingDirectory(new File(workingDirectory));
    }

    // Redirect streams if needed
    if (streamHandler != null) {
        executor.setStreamHandler(streamHandler);
    }

    // Create a watchdog if requested
    if (printJobTimeout > 0) {
        watchdog = new ExecuteWatchdog(printJobTimeout);
        executor.setWatchdog(watchdog);
    }

    // Pass a "ExecuteResultHandler" when doing background printing
    if (printInBackground) {
        log.debug(String.format("Executing non-blocking process %s", commandLine.toString()));
        resultHandler = new PrintResultHandler(watchdog);
        executor.execute(commandLine, resultHandler);
    } else {
        log.debug(String.format("Executing blocking process %s", commandLine.toString()));
        successExitValue = executor.execute(commandLine);
        resultHandler = new PrintResultHandler(successExitValue);
    }

    return resultHandler;
}