Log.cpp

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/*
 * Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#include "luci/Log.h"
 
#include <luci/UserSettings.h>
 
#include <cassert>
#include <cstdlib>
#include <iostream>
 
// TODO Extract these lexical conversion routines as a library
namespace
{
 
template <typename T> T safecast(const char *, const T &);
 
template <> int safecast<int>(const char *s, const int &value)
{
  return (s == nullptr) ? value : std::stoi(s);
}
 
} // namespace
 
//
// Logger
//
namespace luci
{
 
Logger::Logger(hermes::Context *ctx) { activate(ctx->sources(), ctx->bus()); }
Logger::~Logger() { deactivate(); }
 
} // namespace luci
 
//
// LoggerConfig
//
namespace luci
{
 
LoggerConfig::LoggerConfig()
{
  auto settings = luci::UserSettings::settings();
 
  _show_warn = !settings->get(luci::UserSettings::Key::MuteWarnings);
 
  // Turn on verbose logging if LUCI_LOG is set to some level
  // VERBOSE(l, 1) will be visible with LUCI_LOG=2 and VERBOSE(l, 2) with LUCI_LOG=3 and so on
  _show_verbose = safecast<int>(std::getenv("LUCI_LOG"), 0);
}
 
void LoggerConfig::configure(const hermes::Source *source, hermes::Source::Setting &setting) const
{
  // Let's ignore hermes::Sources if that is not a moco logger
  if (auto logger = dynamic_cast<const Logger *>(source))
  {
    configure(logger, setting);
  }
}
 
void LoggerConfig::configure(const Logger *, hermes::Source::Setting &setting) const
{
  setting.reject_all();
  setting.filter(hermes::SeverityCategory::FATAL).accept_upto(_show_verbose);
  setting.filter(hermes::SeverityCategory::ERROR).accept_upto(_show_verbose);
  if (_show_warn)
  {
    setting.filter(hermes::SeverityCategory::WARN).accept_upto(_show_verbose);
  }
  setting.filter(hermes::SeverityCategory::INFO).accept_upto(_show_verbose);
  setting.filter(hermes::SeverityCategory::VERBOSE).accept_upto(_show_verbose);
}
 
} // namespace luci