Examples with ExecException org.apache.camel.component.exec.ExecException used on opensource projects

Example 1 with ExecException

use of org.apache.camel.component.exec.ExecException in project camel by apache.

the class DefaultExecCommandExecutor method execute.

@Override
public ExecResult execute(ExecCommand command) {
    notNull(command, "command");
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    ByteArrayOutputStream err = new ByteArrayOutputStream();
    DefaultExecutor executor = prepareDefaultExecutor(command);
    // handle error and output of the process and write them to the given
    // out stream
    PumpStreamHandler handler = new PumpStreamHandler(out, err, command.getInput());
    executor.setStreamHandler(handler);
    CommandLine cl = toCommandLine(command);
    try {
        int exitValue = executor.execute(cl);
        // if the size is zero, we have no output, so construct the result
        // with null (required by ExecResult)
        InputStream stdout = out.size() == 0 ? null : new ByteArrayInputStream(out.toByteArray());
        InputStream stderr = err.size() == 0 ? null : new ByteArrayInputStream(err.toByteArray());
        ExecResult result = new ExecResult(command, stdout, stderr, exitValue);
        return result;
    } catch (ExecuteException ee) {
        LOG.error("ExecException while executing command: " + command.toString() + " - " + ee.getMessage());
        InputStream stdout = out.size() == 0 ? null : new ByteArrayInputStream(out.toByteArray());
        InputStream stderr = err.size() == 0 ? null : new ByteArrayInputStream(err.toByteArray());
        throw new ExecException("Failed to execute command " + command, stdout, stderr, ee.getExitValue(), ee);
    } catch (IOException ioe) {
        InputStream stdout = out.size() == 0 ? null : new ByteArrayInputStream(out.toByteArray());
        InputStream stderr = err.size() == 0 ? null : new ByteArrayInputStream(err.toByteArray());
        // use 0 as exit value as the executor didn't return the value
        int exitValue = 0;
        if (executor instanceof ExecDefaultExecutor) {
            // get the exit value from the executor as it captures this to work around the common-exec bug
            exitValue = ((ExecDefaultExecutor) executor).getExitValue();
        }
        // workaround to ignore if the stream was already closes due some race condition in commons-exec
        String msg = ioe.getMessage();
        if (msg != null && "stream closed".equals(msg.toLowerCase(Locale.ENGLISH))) {
            LOG.debug("Ignoring Stream closed IOException", ioe);
            ExecResult result = new ExecResult(command, stdout, stderr, exitValue);
            return result;
        }
        // invalid working dir
        LOG.error("IOException while executing command: " + command.toString() + " - " + ioe.getMessage());
        throw new ExecException("Unable to execute command " + command, stdout, stderr, exitValue, ioe);
    } finally {
        // the inputStream must be closed after the execution
        IOUtils.closeQuietly(command.getInput());
    }
}