#pragma once

#include <memory>

#include "envoy/common/pure.h"

#include "absl/strings/string_view.h"

#include "absl/types/optional.h"

namespace Envoy {

namespace StreamInfo {

/**

 * Stream id for a stream (TCP connection, long-live HTTP2

 * stream, HTTP request, etc.). This  provides string view

 * for logging and tracing and integer view for in modulo,

 * etc. calculations.

 */

class StreamIdProvider {

public:

  /**

   * @return the optional string view of the stream id.

   */

  virtual absl::optional<absl::string_view> toStringView() const PURE;

  /**

   * @return the optional integer view of the stream id.

   */

  virtual absl::optional<uint64_t> toInteger() const PURE;

};

using StreamIdProviderSharedPtr = std::shared_ptr<StreamIdProvider>;

} // namespace StreamInfo

} // namespace Envoy