public List<Request> getRequests(Collection<Long> requestIds) {
    List<Request> requests =  db.getRequests(requestIds);
    requests.addAll(topologyManager.getRequests(requestIds));

    return requests;
  }
Guice-injected Constructor.

@param db
@param requestFactory
@param scheduler
ambari-server/src/main/java/org/apache/ambari/server/actionmanager/ActionManager.java