#pragma once

#include "absl/container/flat_hash_map.h"
#include "absl/types/optional.h"

#include "Client.h"
#include "ConsumeMessageService.h"
#include "FilterExpression.h"

ROCKETMQ_NAMESPACE_BEGIN

class Consumer : virtual public Client {
public:
  ~Consumer() override = default;

  virtual absl::optional<FilterExpression> getFilterExpression(const std::string& topic) const = 0;

  virtual uint32_t maxCachedMessageQuantity() const = 0;

  virtual uint64_t maxCachedMessageMemory() const = 0;

  virtual int32_t receiveBatchSize() const = 0;

  virtual std::shared_ptr<ConsumeMessageService> getConsumeMessageService() = 0;
};

ROCKETMQ_NAMESPACE_END