ifw-daq  3.0.0-pre2
IFW Data Acquisition modules
eventLogObserver.cpp
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1 /**
2  * @file
3  * @ingroup daq_common_libdaq
4  * @copyright 2022 ESO - European Southern Observatory
5  *
6  * @brief Contains definitions for EventLogObserverLogger
7  */
9 #include <fmt/format.h>
10 #include <log4cplus/loggingmacros.h>
11 
12 namespace {
13 template <class>
14 inline constexpr bool always_false_v = false; // NOLINT
15 }
16 
17 namespace daq {
18 
20  : m_logger(std::move(logger)) {
21 }
22 
23 /**
24  * Observer callback that immediately logs the event.
25  */
27  char const* preamble = "[DAQ EVENT]";
28  std::visit(
29  [&](auto const& ev) {
30  using T = std::decay_t<decltype(ev)>;
31  if constexpr (std::is_same_v<T, UserActionEvent>) {
32  auto const& ev = std::get<UserActionEvent>(event);
33  LOG4CPLUS_INFO(m_logger,
34  fmt::format("{} id='{}', type=UserActionEvent, description='{}'",
35  preamble,
36  ev.id,
37  ev.description));
38  return;
39  } else if constexpr (std::is_same_v<T, ActionEvent>) {
40  auto const& ev = std::get<ActionEvent>(event);
41  LOG4CPLUS_INFO(m_logger,
42  fmt::format("{} id='{}', type=ActionEvent, description='{}'",
43  preamble,
44  ev.id,
45  ev.description));
46  return;
47  } else if constexpr (std::is_same_v<T, GenericEvent>) {
48  auto const& ev = std::get<GenericEvent>(event);
49  LOG4CPLUS_INFO(m_logger,
50  fmt::format("{} id='{}', type=GenericEvent, description='{}'",
51  preamble,
52  ev.id,
53  ev.description));
54  return;
55  } else if constexpr (std::is_same_v<T, ErrorEvent>) {
56  auto const& ev = std::get<ErrorEvent>(event);
57  LOG4CPLUS_INFO(m_logger,
58  fmt::format("{} id='{}', type=ErrorEvent, origin='{}', "
59  "description='{}'",
60  preamble,
61  ev.id,
62  ev.origin,
63  ev.description));
64  return;
65  } else {
66  static_assert(always_false_v<T>, "non-exhaustive visitor!");
67  }
68  },
69  event);
70 }
71 
72 } // namespace daq
EventLogObserverLogger(log4cplus::Logger logger)
void operator()(EventLog::EventType const &event) noexcept
Observer callback that immediately logs the event.
Contains declaration for EventLogObserverLogger.
std::variant< ActionEvent, UserActionEvent, GenericEvent, ErrorEvent > EventType
Definition: eventLog.hpp:90