src/bin/lttng-sessiond/ctf2-trace-class-visitor.hpp

   1 /*
   2  * Copyright (C) 2022 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #ifndef LTTNG_CTF2_TRACE_CLASS_VISITOR_H
   9 #define LTTNG_CTF2_TRACE_CLASS_VISITOR_H
  10
  11 #include "trace-class.hpp"
  12 #include "stream-class.hpp"
  13 #include "event-class.hpp"
  14
  15 #include <vendor/optional.hpp>
  16 #include <vendor/nlohmann/json.hpp>
  17
  18 #include <functional>
  19
  20 namespace lttng {
  21 namespace sessiond {
  22 namespace ctf2 {
  23
  24 using append_metadata_fragment_function = std::function<void(const std::string& fragment)>;
  25
  26 class trace_class_visitor : public lttng::sessiond::trace::trace_class_visitor {
  27 public:
  28         trace_class_visitor(append_metadata_fragment_function append_metadata);
  29
  30         virtual void visit(const lttng::sessiond::trace::trace_class& trace_class) override final;
  31         virtual void visit(const lttng::sessiond::trace::clock_class& clock_class) override final;
  32         virtual void visit(const lttng::sessiond::trace::stream_class& stream_class) override final;
  33         virtual void visit(const lttng::sessiond::trace::event_class& event_class) override final;
  34
  35 private:
  36         void append_metadata_fragment(const nlohmann::json& fragment) const;
  37
  38         const append_metadata_fragment_function _append_metadata_fragment;
  39 };
  40
  41 } /* namespace ctf2 */
  42 } /* namespace sessiond */
  43 } /* namespace lttng */
  44
  45 #endif /* LTTNG_CTF2_TRACE_CLASS_VISITOR_H */