Example usage for org.apache.commons.exec ExecuteWatchdog checkException

Introduction

In this page you can find the example usage for org.apache.commons.exec ExecuteWatchdog checkException.

Prototype

public synchronized void checkException() throws Exception 

Source Link

Document

This method will rethrow the exception that was possibly caught during the run of the process.

Usage

From source file:org.apache.hive.hcatalog.templeton.StreamOutputWriter.java

private ExecBean auxRun(String program, List<String> args, Map<String, String> env)
        throws NotAuthorizedException, ExecuteException, IOException {
    DefaultExecutor executor = new DefaultExecutor();
    executor.setExitValues(null);//from w  w w.jav  a  2s.c  om

    // Setup stdout and stderr
    int nbytes = appConf.getInt(AppConfig.EXEC_MAX_BYTES_NAME, -1);
    ByteArrayOutputStream outStream = new MaxByteArrayOutputStream(nbytes);
    ByteArrayOutputStream errStream = new MaxByteArrayOutputStream(nbytes);
    executor.setStreamHandler(new PumpStreamHandler(outStream, errStream));

    // Only run for N milliseconds
    int timeout = appConf.getInt(AppConfig.EXEC_TIMEOUT_NAME, 0);
    ExecuteWatchdog watchdog = new ExecuteWatchdog(timeout);
    executor.setWatchdog(watchdog);

    CommandLine cmd = makeCommandLine(program, args);

    LOG.info("Running: " + cmd);
    ExecBean res = new ExecBean();

    res.exitcode = executor.execute(cmd, execEnv(env));

    String enc = appConf.get(AppConfig.EXEC_ENCODING_NAME);
    res.stdout = outStream.toString(enc);
    res.stderr = errStream.toString(enc);
    try {
        watchdog.checkException();
    } catch (Exception ex) {
        LOG.error("Command: " + cmd + " failed. res=" + res, ex);
    }
    if (watchdog.killedProcess()) {
        String msg = " was terminated due to timeout(" + timeout + "ms).  See " + AppConfig.EXEC_TIMEOUT_NAME
                + " property";
        LOG.warn("Command: " + cmd + msg + " res=" + res);
        res.stderr += " Command " + msg;
    }
    if (res.exitcode != 0) {
        LOG.info("Command: " + cmd + " failed. res=" + res);
    }
    return res;
}

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