String appHost = "host";
int appPort = 0;
String appUrl = "url";
final TaskSchedulerWithDrainableAppCallback scheduler =
new TaskSchedulerWithDrainableAppCallback(
mockApp, new PreemptionMatcher(), appHost, appPort,
appUrl, mockRMClient, mockAppContext);
TaskSchedulerAppCallbackDrainable drainableAppCallback = scheduler
.getDrainableAppCallback();
Configuration conf = new Configuration();