jrmccluskey commented on code in PR #17955: URL: https://github.com/apache/beam/pull/17955#discussion_r889308951
########## sdks/go/examples/native_wordcap/nativepubsubio/subscriptiontracker.go: ########## @@ -0,0 +1,80 @@ +// Licensed to the Apache Software Foundation (ASF) under one or more +// contributor license agreements. See the NOTICE file distributed with +// this work for additional information regarding copyright ownership. +// The ASF licenses this file to You under the Apache License, Version 2.0 +// (the "License"); you may not use this file except in compliance with +// the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package nativepubsubio + +import "math" + +// The SubscriptionRTracker maintains a single entry string to keep up with +// the PubSub subscription being used in the NativeRead SDF. +type SubscriptionRTracker struct { + Subscription string + Done bool +} + +// NewSubscriptionRTracker returns an RTracker wrapping the +// provided subscription and a "Done" boolean. +func NewSubscriptionRTracker(entry string) *SubscriptionRTracker { + return &SubscriptionRTracker{Subscription: entry, Done: false} +} + +// TryClaim returns true iff the given position is a string and matches the underlying +// subscription ID. +func (s *SubscriptionRTracker) TryClaim(pos interface{}) bool { + posString, ok := pos.(string) + return ok && posString == s.Subscription +} + +// TrySplit is a no-op for the StaticRTracker in the normal case and moves the subscription +// to the residual in the checkpointing case, marking itself as done to keep the logical checks +// around SDF data loss happy. +func (s *SubscriptionRTracker) TrySplit(frac float64) (primary, residual interface{}, err error) { + if math.Abs(frac-0.000) < 0.0001 { Review Comment: Oops -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
