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250 lines
10 KiB
C++
250 lines
10 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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#ifndef SRSLOG_SRSLOG_H
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#define SRSLOG_SRSLOG_H
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#include "srsran/srslog/detail/support/any.h"
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#include "srsran/srslog/logger.h"
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#include "srsran/srslog/shared_types.h"
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namespace srslog {
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///
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/// NOTE: All functions are thread safe unless otherwise specified.
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///
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///
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/// Log channel management functions.
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///
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/// Finds a log channel with the specified id string in the repository. On
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/// success returns a pointer to the requested log channel, otherwise nullptr.
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log_channel* find_log_channel(const std::string& id);
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/// Returns an instance of a log_channel with the specified id that writes to
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/// the default sink using the default log channel configuration.
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/// NOTE: Any '#' characters in the id will get removed.
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log_channel& fetch_log_channel(const std::string& id);
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/// Returns an instance of a log_channel with the specified id that writes to
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/// the specified sink.
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/// NOTE: Any '#' characters in the id will get removed.
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log_channel&
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fetch_log_channel(const std::string& id, sink& s, log_channel_config config);
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/// Creates a new log channel instance with the specified id string and sink,
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/// then registers it in the log channel repository so that it can be later
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/// retrieved in other parts of the application. Returns a pointer to the
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/// newly created channel, otherwise when a channel is already registered with
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/// the same id it returns nullptr.
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/// NOTE: The input id string should not contain any '#' characters otherwise
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/// nullptr is returned.
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/// NOTE: Deprecated, use fetch_log_channel instead.
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log_channel* create_log_channel(const std::string& id, sink& s);
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///
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/// Logger management functions.
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///
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namespace detail {
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/// Internal helper functions.
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detail::any* fetch_logger(const std::string& id, detail::any&& logger);
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detail::any* find_logger(const std::string& id);
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} // namespace detail
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/// Finds a logger with the specified id string and type in the repository. On
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/// success returns a pointer to the requested logger, otherwise nullptr.
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/// NOTE: T should be a type that is a logger.
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template <typename T>
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inline T* find_logger(const std::string& id)
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{
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static_assert(detail::is_logger<T>::value, "T should be a logger type");
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detail::any* p = detail::find_logger(id);
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return detail::any_cast<T>(p);
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}
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/// Returns an instance of a basic logger (see basic_logger type) with the
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/// specified id string. All logger channels will write into the default sink.
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/// The context value of the logger can be printed on each log entry by setting
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/// to true the should_print_context argument.
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basic_logger& fetch_basic_logger(const std::string& id,
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bool should_print_context = true);
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/// Returns an instance of a basic logger (see basic_logger type) with the
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/// specified id string. All logger channels will write into the specified sink.
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/// The context value of the logger can be printed on each log entry by setting
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/// to true the should_print_context argument.
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basic_logger& fetch_basic_logger(const std::string& id,
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sink& s,
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bool should_print_context = true);
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/// Returns a logger instance with the specified id string, type and channel
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/// references.
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/// NOTE: T should be a type that is a logger.
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template <typename T, typename... Args>
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inline T& fetch_logger(const std::string& id, Args&&... args)
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{
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static_assert(detail::is_logger<T>::value, "T should be a logger type");
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if (auto *logger = find_logger<T>(id)) {
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return *logger;
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}
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auto logger = detail::make_any<T>(id, std::forward<Args>(args)...);
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detail::any* p = detail::fetch_logger(id, std::move(logger));
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return *detail::any_cast<T>(p);
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}
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/// Creates a new basic logger instance (see basic_logger type) with the
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/// specified id string and sink, registering it into the logger repository so
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/// that it can be later retrieved in other parts of the application. The
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/// context value of the logger can be printed on each log entry by setting to
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/// true the should_print_context argument. All logger channels will write into
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/// the specified sink. Returns a pointer to the newly created logger, otherwise
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/// when a logger is already registered with the same id it returns nullptr.
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/// NOTE: Deprecated, use fetch_basic_logger instead.
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basic_logger* create_basic_logger(const std::string& id,
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sink& s,
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bool should_print_context = true);
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/// Creates a new logger instance with the specified id string, type and channel
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/// references, registering it into the logger repository so that it can be
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/// later retrieved in other parts of the application. Returns a pointer to the
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/// newly created logger, otherwise when a logger is already registered with the
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/// same id it returns nullptr.
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/// NOTE: T should be a type that is a logger.
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/// NOTE: Deprecated, use fetch_logger instead.
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template <typename T, typename... Args>
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inline T* create_logger(const std::string& id, Args&&... args)
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{
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static_assert(detail::is_logger<T>::value, "T should be a logger type");
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auto logger = detail::make_any<T>(id, std::forward<Args>(args)...);
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detail::any* p = detail::fetch_logger(id, std::move(logger));
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return detail::any_cast<T>(p);
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}
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///
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/// Formatter management functions.
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///
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/// Installs the specified formatter to be used as the default one by new sinks.
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/// The initial default formatter formats plain text.
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void set_default_log_formatter(std::unique_ptr<log_formatter> f);
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/// Returns the instance of the default formatter being used.
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std::unique_ptr<log_formatter> get_default_log_formatter();
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/// Creates a new instance of a plain text formatter.
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std::unique_ptr<log_formatter> create_text_formatter();
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/// Creates a new instance of a JSON formatter.
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std::unique_ptr<log_formatter> create_json_formatter();
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///
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/// Sink management functions.
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///
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/// Installs the specified sink to be used as the default one by new log
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/// channels and loggers.
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/// The initial default sink writes to stdout with a text formatter.
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void set_default_sink(sink& s);
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/// Returns the instance of the default sink being used.
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sink& get_default_sink();
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/// Finds a sink with the specified id string in the repository. On
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/// success returns a pointer to the requested sink, otherwise nullptr.
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sink* find_sink(const std::string& id);
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/// Returns an instance of a sink that writes to the stdout stream. You may use
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/// different ids if you need to create multiple stdout sinks with different
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/// formatters.
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sink& fetch_stdout_sink(
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const std::string& id = "stdout",
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std::unique_ptr<log_formatter> f = get_default_log_formatter());
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/// Returns an instance of a sink that writes to the stderr stream. You may use
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/// different ids if you need to create multiple stderr sinks with different
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/// formatters.
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sink& fetch_stderr_sink(
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const std::string& id = "stderr",
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std::unique_ptr<log_formatter> f = get_default_log_formatter());
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/// Returns an instance of a sink that writes into a file in the specified path.
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/// Specifying a max_size value different to zero will make the sink create a
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/// new file each time the current file exceeds this value. The units of
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/// max_size are bytes.
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/// NOTE: Any '#' characters in the path will get removed.
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sink& fetch_file_sink(
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const std::string& path,
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size_t max_size = 0,
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std::unique_ptr<log_formatter> f = get_default_log_formatter());
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/// Installs a custom user defined sink in the framework getting associated to
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/// the specified id. Returns true on success, otherwise false.
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/// WARNING: This function is an advanced feature and users should really know
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/// what they are doing when using it.
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bool install_custom_sink(const std::string& id, std::unique_ptr<sink> s);
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/// Creates a new sink that writes into the a file in the specified path and
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/// registers it into a sink repository so that it can be later retrieved in
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/// other parts of the application. Returns a pointer to the newly created sink
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/// or nullptr if a sink with the same path was already registered.
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/// Specifying a max_size value different to zero will make the sink create a
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/// new file each time the current file exceeds this value. The units of
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/// max_size are bytes.
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/// NOTE: Deprecated, use fetch_file_sink instead.
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sink* create_file_sink(const std::string& path, size_t max_size = 0);
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/// Creates a new sink that writes into the stdout stream and registers it into
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/// a sink repository so that it can be later retrieved in other parts of the
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/// application. Different stdout sinks can be created by providing different
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/// names. Returns a pointer to the newly created sink or nullptr if a sink with
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/// the same name was already registered.
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/// NOTE: Deprecated, use get_stdout_sink instead.
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sink* create_stdout_sink(const std::string& name = "stdout");
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/// Creates a new sink that writes into the stderr stream and registers it into
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/// a sink repository so that it can be later retrieved in other parts of the
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/// application. Different stderr sinks can be created by providing different
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/// names. Returns a pointer to the newly created sink or nullptr if a sink with
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/// the same name was already registered.
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/// NOTE: Deprecated, use get_stderr_sink instead.
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sink* create_stderr_sink(const std::string& name = "stderr");
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///
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/// Framework configuration and control functions.
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///
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/// This function initializes the logging framework. It must be called before
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/// any log entry is generated.
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/// NOTE: Calling this function more than once has no side effects.
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void init();
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/// Flushes the contents of all the registered sinks. The caller thread will
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/// block until the operation is completed.
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/// NOTE: This function does nothing if init() has not been called.
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void flush();
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/// Installs the specified error handler to receive any error messages generated
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/// by the framework.
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/// NOTE: This function should be called before init() and is NOT thread safe.
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void set_error_handler(error_handler handler);
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} // namespace srslog
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#endif // SRSLOG_SRSLOG_H
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