ProcessClass::Fitness ProcessClass::machineClassFitness()

in fdbrpc/Locality.cpp [32:296]
265 lines of code
128 McCabe index (conditional complexity)

ProcessClass::Fitness ProcessClass::machineClassFitness(ClusterRole role) const {
	switch (role) {
	case ProcessClass::Storage:
		switch (_class) {
		case ProcessClass::StorageClass:
			return ProcessClass::BestFit;
		case ProcessClass::UnsetClass:
			return ProcessClass::UnsetFit;
		case ProcessClass::TransactionClass:
			return ProcessClass::WorstFit;
		case ProcessClass::LogClass:
			return ProcessClass::WorstFit;
		case ProcessClass::CoordinatorClass:
		case ProcessClass::TesterClass:
		case ProcessClass::StorageCacheClass:
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::NeverAssign;
		default:
			return ProcessClass::NeverAssign;
		}
	case ProcessClass::TLog:
		switch (_class) {
		case ProcessClass::LogClass:
			return ProcessClass::BestFit;
		case ProcessClass::TransactionClass:
			return ProcessClass::GoodFit;
		case ProcessClass::UnsetClass:
			return ProcessClass::UnsetFit;
		case ProcessClass::StorageClass:
			return ProcessClass::WorstFit;
		case ProcessClass::CoordinatorClass:
		case ProcessClass::TesterClass:
		case ProcessClass::StorageCacheClass:
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::NeverAssign;
		default:
			return ProcessClass::NeverAssign;
		}
	case ProcessClass::CommitProxy: // Resolver, Master, CommitProxy, and GrvProxy need to be the same besides best fit
		switch (_class) {
		case ProcessClass::CommitProxyClass:
			return ProcessClass::BestFit;
		case ProcessClass::StatelessClass:
			return ProcessClass::GoodFit;
		case ProcessClass::UnsetClass:
			return ProcessClass::UnsetFit;
		case ProcessClass::TransactionClass:
			return ProcessClass::OkayFit;
		case ProcessClass::CoordinatorClass:
		case ProcessClass::TesterClass:
		case ProcessClass::StorageCacheClass:
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::NeverAssign;
		default:
			return ProcessClass::WorstFit;
		}
	case ProcessClass::GrvProxy: // Resolver, Master, CommitProxy, and GrvProxy need to be the same besides best fit
		switch (_class) {
		case ProcessClass::GrvProxyClass:
			return ProcessClass::BestFit;
		case ProcessClass::StatelessClass:
			return ProcessClass::GoodFit;
		case ProcessClass::UnsetClass:
			return ProcessClass::UnsetFit;
		case ProcessClass::TransactionClass:
			return ProcessClass::OkayFit;
		case ProcessClass::CoordinatorClass:
		case ProcessClass::TesterClass:
		case ProcessClass::StorageCacheClass:
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::NeverAssign;
		default:
			return ProcessClass::WorstFit;
		}
	case ProcessClass::Master: // Resolver, Master, CommitProxy, and GrvProxy need to be the same besides best fit
		switch (_class) {
		case ProcessClass::MasterClass:
			return ProcessClass::BestFit;
		case ProcessClass::StatelessClass:
			return ProcessClass::GoodFit;
		case ProcessClass::UnsetClass:
			return ProcessClass::UnsetFit;
		case ProcessClass::TransactionClass:
			return ProcessClass::OkayFit;
		case ProcessClass::CoordinatorClass:
		case ProcessClass::TesterClass:
		case ProcessClass::StorageCacheClass:
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::NeverAssign;
		default:
			return ProcessClass::WorstFit;
		}
	case ProcessClass::Resolver: // Resolver, Master, CommitProxy, and GrvProxy need to be the same besides best fit
		switch (_class) {
		case ProcessClass::ResolutionClass:
			return ProcessClass::BestFit;
		case ProcessClass::StatelessClass:
			return ProcessClass::GoodFit;
		case ProcessClass::UnsetClass:
			return ProcessClass::UnsetFit;
		case ProcessClass::TransactionClass:
			return ProcessClass::OkayFit;
		case ProcessClass::CoordinatorClass:
		case ProcessClass::TesterClass:
		case ProcessClass::StorageCacheClass:
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::NeverAssign;
		default:
			return ProcessClass::WorstFit;
		}
	case ProcessClass::LogRouter:
		switch (_class) {
		case ProcessClass::LogRouterClass:
			return ProcessClass::BestFit;
		case ProcessClass::StatelessClass:
			return ProcessClass::GoodFit;
		case ProcessClass::UnsetClass:
			return ProcessClass::UnsetFit;
		case ProcessClass::TransactionClass:
			return ProcessClass::OkayFit;
		case ProcessClass::CoordinatorClass:
		case ProcessClass::TesterClass:
		case ProcessClass::StorageCacheClass:
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::NeverAssign;
		default:
			return ProcessClass::WorstFit;
		}
	case ProcessClass::Backup:
		switch (_class) {
		case ProcessClass::BackupClass:
			return ProcessClass::BestFit;
		case ProcessClass::StatelessClass:
		case ProcessClass::LogRouterClass:
			return ProcessClass::GoodFit;
		case ProcessClass::UnsetClass:
			return ProcessClass::UnsetFit;
		case ProcessClass::TransactionClass:
			return ProcessClass::OkayFit;
		case ProcessClass::CoordinatorClass:
		case ProcessClass::MasterClass:
		case ProcessClass::TesterClass:
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::NeverAssign;
		default:
			return ProcessClass::WorstFit;
		}
	case ProcessClass::ClusterController:
		switch (_class) {
		case ProcessClass::ClusterControllerClass:
			return ProcessClass::BestFit;
		case ProcessClass::StatelessClass:
			return ProcessClass::GoodFit;
		case ProcessClass::UnsetClass:
			return ProcessClass::UnsetFit;
		case ProcessClass::MasterClass:
			return ProcessClass::OkayFit;
		case ProcessClass::ResolutionClass:
			return ProcessClass::OkayFit;
		case ProcessClass::TransactionClass:
			return ProcessClass::OkayFit;
		case ProcessClass::CommitProxyClass:
			return ProcessClass::OkayFit;
		case ProcessClass::GrvProxyClass:
			return ProcessClass::OkayFit;
		case ProcessClass::LogRouterClass:
			return ProcessClass::OkayFit;
		case ProcessClass::CoordinatorClass:
		case ProcessClass::TesterClass:
		case ProcessClass::StorageCacheClass:
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::NeverAssign;
		default:
			return ProcessClass::WorstFit;
		}
	case ProcessClass::DataDistributor:
		switch (_class) {
		case ProcessClass::DataDistributorClass:
			return ProcessClass::BestFit;
		case ProcessClass::StatelessClass:
			return ProcessClass::GoodFit;
		case ProcessClass::UnsetClass:
			return ProcessClass::UnsetFit;
		case ProcessClass::MasterClass:
			return ProcessClass::OkayFit;
		case ProcessClass::CoordinatorClass:
		case ProcessClass::TesterClass:
		case ProcessClass::StorageCacheClass:
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::NeverAssign;
		default:
			return ProcessClass::WorstFit;
		}
	case ProcessClass::Ratekeeper:
		switch (_class) {
		case ProcessClass::RatekeeperClass:
			return ProcessClass::BestFit;
		case ProcessClass::StatelessClass:
			return ProcessClass::GoodFit;
		case ProcessClass::UnsetClass:
			return ProcessClass::UnsetFit;
		case ProcessClass::MasterClass:
			return ProcessClass::OkayFit;
		case ProcessClass::CoordinatorClass:
		case ProcessClass::TesterClass:
		case ProcessClass::StorageCacheClass:
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::NeverAssign;
		default:
			return ProcessClass::WorstFit;
		}
	case ProcessClass::BlobManager:
		switch (_class) {
		case ProcessClass::BlobManagerClass:
			return ProcessClass::BestFit;
		case ProcessClass::StatelessClass:
			return ProcessClass::GoodFit;
		case ProcessClass::UnsetClass:
			return ProcessClass::UnsetFit;
		case ProcessClass::MasterClass:
			return ProcessClass::OkayFit;
		case ProcessClass::CoordinatorClass:
		case ProcessClass::TesterClass:
		case ProcessClass::StorageCacheClass:
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::NeverAssign;
		default:
			return ProcessClass::WorstFit;
		}
	case ProcessClass::BlobWorker:
		switch (_class) {
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::BestFit;
		default:
			return ProcessClass::NeverAssign;
		}
	case ProcessClass::StorageCache:
		switch (_class) {
		case ProcessClass::StorageCacheClass:
			return ProcessClass::BestFit;
		default:
			return ProcessClass::NeverAssign;
		}
	case ProcessClass::EncryptKeyProxy:
		switch (_class) {
		case ProcessClass::EncryptKeyProxyClass:
			return ProcessClass::BestFit;
		case ProcessClass::StatelessClass:
			return ProcessClass::GoodFit;
		case ProcessClass::UnsetClass:
			return ProcessClass::UnsetFit;
		case ProcessClass::MasterClass:
			return ProcessClass::OkayFit;
		case ProcessClass::CoordinatorClass:
		case ProcessClass::TesterClass:
		case ProcessClass::StorageCacheClass:
		case ProcessClass::BlobWorkerClass:
			return ProcessClass::NeverAssign;
		default:
			return ProcessClass::WorstFit;
		}
	default:
		return ProcessClass::NeverAssign;
	}
}