text: /**
   * 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.
   */
  
  #ifndef LIB_READERIMPL_H_
  #define LIB_READERIMPL_H_
  
  #include "ConsumerImpl.h"
  
  namespace pulsar {
  
  class ReaderImpl;
  
  typedef std::shared_ptr<ReaderImpl> ReaderImplPtr;
  typedef std::weak_ptr<ReaderImpl> ReaderImplWeakPtr;
  
  class ReaderImpl : public std::enable_shared_from_this<ReaderImpl> {
     public:
      ReaderImpl(const ClientImplPtr client, const std::string& topic, const ReaderConfiguration& conf,
                 const ExecutorServicePtr listenerExecutor, ReaderCallback readerCreatedCallback);
  
      void start(const MessageId& startMessageId);
  
      const std::string& getTopic() const;
  
      Result readNext(Message& msg);
      Result readNext(Message& msg, int timeoutMs);
  
      void closeAsync(ResultCallback callback);
  
      Future<Result, ReaderImplWeakPtr> getReaderCreatedFuture();
  
      ConsumerImplPtr getConsumer();
  
      void hasMessageAvailableAsync(HasMessageAvailableCallback callback);
  
      void seekAsync(const MessageId& msgId, ResultCallback callback);
      void seekAsync(uint64_t timestamp, ResultCallback callback);
  
      ReaderImplWeakPtr getReaderImplWeakPtr();
  
     private:
      void handleConsumerCreated(Result result, ConsumerImplBaseWeakPtr consumer);
  
      void messageListener(Consumer consumer, const Message& msg);
  
      void acknowledgeIfNecessary(Result result, const Message& msg);
  
      std::string topic_;
      ClientImplWeakPtr client_;
      ReaderConfiguration readerConf_;
      ConsumerImplPtr consumer_;
      ReaderCallback readerCreatedCallback_;
      ReaderListener readerListener_;
      ReaderImplWeakPtr readerImplWeakPtr_;
  };
  }  // namespace pulsar
  
  #endif /* LIB_READERIMPL_H_ */
  