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// Copyright (C) 2014-2019 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#ifndef DHCPSRV_LOGGING_H
#define DHCPSRV_LOGGING_H
#include <cc/data.h>
#include <process/logging_info.h>
#include <process/config_base.h>
#include <vector>
namespace isc {
namespace process {
/// @brief Configures log4cplus by translating Kea configuration structures
///
/// This parser iterates over provided data elements and translates them
/// into values applicable to log4cplus.
///
/// The data structures converted to JSON format have the following syntax:
/// {
/// "name": "kea",
/// "output_options": [
/// {
/// "output": "/home/thomson/kea-inst/kea-warn.log",
/// "maxver": 8,
/// "maxsize": 204800,
/// "flush": true
/// }
/// ],
/// "severity": "WARN"
/// }
///
/// This is only an example and actual values may be different.
///
/// The data structures don't have to originate from JSON. JSON is just a
/// convenient presentation syntax.
///
/// This class uses @c ConfigBase object to store logging configuration.
class LogConfigParser {
public:
/// @brief Constructor
///
/// @param storage parsed logging configuration will be stored here
LogConfigParser(const ConfigPtr& storage);
/// @brief Parses specified configuration
///
/// Walks over specified logging configuration JSON structures and store
/// parsed information in config_->logging_info_.
///
/// @param log_config JSON structures to be parsed (loggers list)
/// @param verbose specifies verbose mode (true forces DEBUG, debuglevel = 99)
void parseConfiguration(const isc::data::ConstElementPtr& log_config,
bool verbose = false);
private:
/// @brief Parses one JSON structure in Server/loggers" array
///
/// @param entry JSON structure to be parsed
/// @brief parses one structure in Server/loggers.
void parseConfigEntry(isc::data::ConstElementPtr entry);
/// @brief Parses output_options structure
///
/// @ref @c LogConfigParser for an example in JSON format.
///
/// @param destination parsed parameters will be stored here
/// @param output_options element to be parsed
void parseOutputOptions(std::vector<LoggingDestination>& destination,
isc::data::ConstElementPtr output_options);
/// @brief Configuration is stored here
///
/// LogConfigParser class uses only config_->logging_info_ field.
ConfigPtr config_;
/// @brief Verbose mode
///
/// When verbose mode is enabled, logging severity is overridden to DEBUG,
/// and debuglevel is always 99.
bool verbose_;
};
} // namespace isc::dhcp
} // namespace isc
#endif // DHCPSRV_LOGGING_H
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