lib/MultiResultCallback.h (26 lines of code) (raw):

/** * 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. */ #pragma once #include <pulsar/ConsumerConfiguration.h> // for ResultCallback #include <atomic> #include <memory> namespace pulsar { class MultiResultCallback { public: MultiResultCallback(ResultCallback callback, int numToComplete) : callback_(callback), numToComplete_(numToComplete), numCompletedPtr_(std::make_shared<std::atomic_int>(0)) {} void operator()(Result result) { if (result == ResultOk) { if (++(*numCompletedPtr_) == numToComplete_) { callback_(result); } } else { callback_(result); } } private: ResultCallback callback_; const int numToComplete_; const std::shared_ptr<std::atomic_int> numCompletedPtr_; }; } // namespace pulsar