/**
* Waits fro the task to be running. If this does not happen within the timeout, then a
* TimeoutException is thrown.
*
* @param timeout Timeout for the task to be running.
* @throws Exception
*/
public void waitForTaskRunning(long timeout) throws Exception {
if (taskThread == null) {
throw new IllegalStateException("Task thread was not started.");
} else {
if (taskThread.task instanceof StreamTask) {
StreamTask<?, ?> streamTask = (StreamTask<?, ?>) taskThread.task;
while (!streamTask.isRunning()) {
Thread.sleep(100);
if (!taskThread.isAlive()) {
if (taskThread.getError() != null) {
throw new Exception("Task Thread failed due to an error.", taskThread.getError());
} else {
throw new Exception("Task Thread unexpectedly shut down.");
}
}
}
} else {
throw new IllegalStateException("Not a StreamTask");
}
}
}
