COOLRates.COOLQueryWorker Node1 COOLRates.COOLQueryWorker + db_svc + timeConverter + db + folder + __init__() + getdb() + getFolder() + getdbName() + convertTime() + processQuery() + close() + __call__() Node2 COOLRates.RateQueryWorker + __init__() + processQuery() Node1->Node2