YugabyteDB (2.13.0.0-b42, bfc6a6643e7399ac8a0e81d06a3ee6d6571b33ab)

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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except

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#ifndef YB_UTIL_LOGGING_TEST_UTIL_H

#define YB_UTIL_LOGGING_TEST_UTIL_H

#include <atomic>

#include <chrono>

#include <string>

#include <vector>

#include <glog/logging.h>

#include "yb/util/monotime.h"

#include "yb/util/status_fwd.h"

namespace yb {

using namespace std::literals;

// GLog sink that keeps an internal buffer of messages that have been logged.

class StringVectorSink : public google::LogSink {

 public:

  void send(google::LogSeverity severity, const char* full_filename,

            const char* base_filename, int line,

            const struct ::tm* tm_time,

            const char* message, size_t message_len) override {

    logged_msgs_.push_back(ToString(severity, base_filename, line,

                                    tm_time, message, message_len));

  }

  const std::vector<std::string>& logged_msgs() const {

    return logged_msgs_;

  }

 private:

  std::vector<std::string> logged_msgs_;

};

// GLog sink that waits for specified string to appear in log.

class StringWaiterLogSink : public google::LogSink {

 public:

  explicit StringWaiterLogSink(const std::string& string_to_wait)

      : string_to_wait_(string_to_wait) {

    google::AddLogSink(this);

  }

  // Wait for string_to_wait to occur in log.

  CHECKED_STATUS WaitFor(MonoDelta timeout);

  void send(

      google::LogSeverity severity, const char* full_filename, const char* base_filename, int line,

      const struct ::tm* tm_time, const char* message, size_t message_len) override;

  bool IsEventOccurred() { return event_occurred_; }

  ~StringWaiterLogSink() { google::RemoveLogSink(this); }

 private:

  static const char* kWaitingMessage;

  std::string string_to_wait_;

  std::atomic<bool> event_occurred_{false};

};

// RAII wrapper around registering a LogSink with GLog.

struct ScopedRegisterSink {

  explicit ScopedRegisterSink(google::LogSink* s) : s_(s) {

    google::AddLogSink(s_);

  }

  ~ScopedRegisterSink() {

    google::RemoveLogSink(s_);

  }

  google::LogSink* s_;

};

} // namespace yb

#endif  // YB_UTIL_LOGGING_TEST_UTIL_H