cnstream/easydk/dist/include/kafka.hpp

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 * Copyright (C) [2020] by Cambricon, Inc. All rights reserved
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 *  you may not use this file except in compliance with the License.
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#ifndef MODULES_KAFKA_HPP_
#define MODULES_KAFKA_HPP_

#include <memory>
#include <mutex>
#include <string>
#include <unordered_map>

#include "cnstream_module.hpp"
#include "cnstream_frame_va.hpp"

namespace cnstream {

struct KafkaContext;

using CNFrameInfoPtr = std::shared_ptr<cnstream::CNFrameInfo>;

class Kafka : public cnstream::Module, public cnstream::ModuleCreator<Kafka> {
 public:
  explicit Kafka(const std::string &name);
  ~Kafka();

  bool Open(cnstream::ModuleParamSet paramSet) override;
  void Close() override;
  int Process(CNFrameInfoPtr data) override;

 private:
  KafkaContext *GetContext(CNFrameInfoPtr data);

  std::mutex mutex_;
  std::unordered_map<int, KafkaContext *> contexts_;
  std::string brokers_;
  std::string handler_name_;
  // the topic_ is prefix of a real topic. eg: if you set topic in json is "cndata",
  // the stream_id 0`s real topic is "cndata_0"
  std::string topic_;
};  // class Kafka

}  // namespace cnstream

#endif  // MODULES_KAFKA_HPP_