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// -*- C++ -*-
// Module: Log4CPLUS
// File: loglevel.h
// Created: 6/2001
// Author: Tad E. Smith
//
//
// Copyright 2001-2017 Tad E. Smith
//
// 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.
/** @file
* This header defines the LogLevel type.
*/
#ifndef LOG4CPLUS_LOGLEVEL_HEADER_
#define LOG4CPLUS_LOGLEVEL_HEADER_
#include <log4cplus/config.hxx>
#if defined (LOG4CPLUS_HAVE_PRAGMA_ONCE)
#pragma once
#endif
#include <vector>
#include <log4cplus/tstring.h>
namespace log4cplus {
/**
* \typedef int LogLevel
* Defines the minimum set of priorities recognized by the system,
* that is {@link #FATAL_LOG_LEVEL}, {@link #ERROR_LOG_LEVEL}, {@link
* #WARN_LOG_LEVEL}, {@link #INFO_LOG_LEVEL}, {@link #DEBUG_LOG_LEVEL},
* and {@link #TRACE_LOG_LEVEL}.
*/
typedef int LogLevel;
/** \var const LogLevel OFF_LOG_LEVEL
* The <code>OFF_LOG_LEVEL</code> LogLevel is used during configuration to
* turn off logging. */
const LogLevel OFF_LOG_LEVEL = 60000;
/** \var const LogLevel FATAL_LOG_LEVEL
* The <code>FATAL_LOG_LEVEL</code> LogLevel designates very severe error
* events that will presumably lead the application to abort. */
const LogLevel FATAL_LOG_LEVEL = 50000;
/** \var const LogLevel ERROR_LOG_LEVEL
* The <code>ERROR_LOG_LEVEL</code> LogLevel designates error events that
* might still allow the application to continue running. */
const LogLevel ERROR_LOG_LEVEL = 40000;
/** \var const LogLevel WARN_LOG_LEVEL
* The <code>WARN_LOG_LEVEL</code> LogLevel designates potentially harmful
* situations. */
const LogLevel WARN_LOG_LEVEL = 30000;
/** \var const LogLevel INFO_LOG_LEVEL
* The <code>INFO_LOG_LEVEL</code> LogLevel designates informational
* messages that highlight the progress of the application at
* coarse-grained level. */
const LogLevel INFO_LOG_LEVEL = 20000;
/** \var const LogLevel DEBUG_LOG_LEVEL
* The <code>DEBUG_LOG_LEVEL</code> LogLevel designates fine-grained
* informational events that are most useful to debug an application. */
const LogLevel DEBUG_LOG_LEVEL = 10000;
/** \var const LogLevel TRACE_LOG_LEVEL
* The <code>TRACE_LOG_LEVEL</code> LogLevel is used to "trace" entry
* and exiting of methods. */
const LogLevel TRACE_LOG_LEVEL = 0;
/** \var const LogLevel ALL_LOG_LEVEL
* The <code>ALL_LOG_LEVEL</code> LogLevel is used during configuration to
* turn on all logging. */
const LogLevel ALL_LOG_LEVEL = TRACE_LOG_LEVEL;
/** \var const LogLevel NOT_SET_LOG_LEVEL
* The <code>NOT_SET_LOG_LEVEL</code> LogLevel is used to indicated that
* no particular LogLevel is desired and that the default should be used.
*/
const LogLevel NOT_SET_LOG_LEVEL = -1;
/**
* This method type defined the signature of methods that convert LogLevels
* into strings.
*
* <b>Note:</b> Must return an empty <code>tstring</code> for unrecognized values.
*/
typedef log4cplus::tstring const & (*LogLevelToStringMethod)(LogLevel);
/**
* This method type defined the signature of methods that convert strings
* into LogLevels.
*
* <b>Note:</b> Must return <code>NOT_SET_LOG_LEVEL</code> for unrecognized values.
*/
typedef LogLevel (*StringToLogLevelMethod)(const log4cplus::tstring&);
/**
* This class is used to "manage" LogLevel definitions. This class is also
* how "derived" LogLevels are created. Here are the steps to creating a
* "derived" LogLevel:
* <ol>
* <li>Create a LogLevel constant (greater than 0)</li>
* <li>Define a string to represent that constant</li>
* <li>Implement a LogLevelToStringMethod method.</li>
* <li>Implement a StringToLogLevelMethod method.</li>
* <li>create a "static initializer" that registers those 2 methods
* with the LogLevelManager singleton.</li>
* </ol>
*/
class LOG4CPLUS_EXPORT LogLevelManager {
public:
LogLevelManager();
~LogLevelManager();
/**
* This method is called by all Layout classes to convert a LogLevel
* into a string.
*
* Note: It traverses the list of <code>LogLevelToStringMethod</code>
* to do this, so all "derived" LogLevels are recognized as well.
*/
log4cplus::tstring const & toString(LogLevel ll) const;
/**
* This method is called by all classes internally to log4cplus to
* convert a string into a LogLevel.
*
* Note: It traverses the list of <code>StringToLogLevelMethod</code>
* to do this, so all "derived" LogLevels are recognized as well.
*/
LogLevel fromString(const log4cplus::tstring& arg) const;
/**
* When creating a "derived" LogLevel, a <code>LogLevelToStringMethod</code>
* should be defined and registered with the LogLevelManager by calling
* this method.
*
* @see pushFromStringMethod
*/
void pushToStringMethod(LogLevelToStringMethod newToString);
/**
* When creating a "derived" LogLevel, a <code>StringToLogLevelMethod</code>
* should be defined and registered with the LogLevelManager by calling
* this method.
*
* @see pushToStringMethod
*/
void pushFromStringMethod(StringToLogLevelMethod newFromString);
private:
// Data
struct LogLevelToStringMethodRec
{
LogLevelToStringMethodRec ();
LogLevelToStringMethodRec (LogLevelToStringMethod);
LogLevelToStringMethod func;
};
typedef std::vector<LogLevelToStringMethodRec> LogLevelToStringMethodList;
LogLevelToStringMethodList toStringMethods;
typedef std::vector<StringToLogLevelMethod> StringToLogLevelMethodList;
StringToLogLevelMethodList fromStringMethods;
// Disable Copy
LogLevelManager(const LogLevelManager&);
LogLevelManager& operator=(const LogLevelManager&);
};
/**
* Returns the singleton LogLevelManager.
*/
LOG4CPLUS_EXPORT LogLevelManager& getLogLevelManager();
}
#endif // LOG4CPLUS_LOGLEVEL_HEADER_
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