[jira] [Created] (MESOS-3339) Implement filtering mechanism for (Scheduler API Events) Testing

["Anand Mazumdar (JIRA)" <ji...@apache.org>]

Anand Mazumdar created MESOS-3339:
-------------------------------------

             Summary: Implement filtering mechanism for (Scheduler API Events) Testing
                 Key: MESOS-3339
                 URL: https://issues.apache.org/jira/browse/MESOS-3339
             Project: Mesos
          Issue Type: Task
          Components: test
            Reporter: Anand Mazumdar


Currently, our testing infrastructure does not have a mechanism of filtering/dropping HTTP events of a particular type from the Scheduler API response stream.  We need a {DROP_HTTP_CALLS} abstraction that can help us to filter a particular event type.

{code}
// Enqueues all received events into a libprocess queue.
ACTION_P(Enqueue, queue)
{
  std::queue<Event> events = arg0;
  while (!events.empty()) {
    // Note that we currently drop HEARTBEATs because most of these tests
    // are not designed to deal with heartbeats.
    // TODO(vinod): Implement DROP_HTTP_CALLS that can filter heartbeats.
    if (events.front().type() == Event::HEARTBEAT) {
      VLOG(1) << "Ignoring HEARTBEAT event";
    } else {
      queue->put(events.front());
    }
    events.pop();
  }
}
{code}

This helper code is duplicated in at least two places currently, Scheduler Library/Maintenance Primitives tests. The solution can be as trivial as moving this helper function to a common test-header or implement a decorator reader class over {RecordIOReader} having the functionality of filtering events. There might be other alternative approaches too.



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