@Override
public int execute(
final OverthereExecutionOutputHandler stdoutHandler,
final OverthereExecutionOutputHandler stderrHandler,
final CmdLine commandLine) {
final OverthereProcess process = startProcess(commandLine);
Thread stdoutReaderThread = null;
Thread stderrReaderThread = null;
final CountDownLatch latch = new CountDownLatch(2);
try {
stdoutReaderThread =
getThread("stdout", commandLine.toString(), stdoutHandler, process.getStdout(), latch);
stdoutReaderThread.start();
stderrReaderThread =
getThread("stderr", commandLine.toString(), stderrHandler, process.getStderr(), latch);
stderrReaderThread.start();
try {
latch.await();
return process.waitFor();
} catch (InterruptedException exc) {
Thread.currentThread().interrupt();
logger.info("Execution interrupted, destroying the process.");
process.destroy();
throw new RuntimeIOException("Execution interrupted", exc);
}
} finally {
quietlyJoinThread(stdoutReaderThread);
quietlyJoinThread(stderrReaderThread);
}
}
private void quietlyJoinThread(final Thread thread) {
if (thread != null) {
try {
// interrupt the thread in case it is stuck waiting for output that will never come
thread.interrupt();
thread.join();
} catch (InterruptedException ignored) {
Thread.currentThread().interrupt();
}
}
}