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// -*- C++ -*-
// Module: Log4CPLUS
// File: customloglevelmanager.h
// Created: 12/2018
// Author: Jens Rehsack
// Author: Václav Haisman
//
//
// Copyright (C) 2018, Jens Rehsack. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modifica-
// tion, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
// DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
/** @file
* This header contains declaration internal to log4cplus. They must never be
* visible from user accesible headers or exported in DLL/shared library.
*/
#ifndef LOG4CPLUS_INTERNAL_CUSTOMLOGLEVELMANAGER_HEADER_
#define LOG4CPLUS_INTERNAL_CUSTOMLOGLEVELMANAGER_HEADER_
#include <log4cplus/config.hxx>
#if defined (LOG4CPLUS_HAVE_PRAGMA_ONCE)
#pragma once
#endif
#if ! defined (INSIDE_LOG4CPLUS)
# error "This header must not be be used outside log4cplus' implementation files."
#endif
#include <map>
#include <log4cplus/thread/syncprims.h>
#include <log4cplus/internal/internal.h>
namespace log4cplus {
namespace internal {
/**
* Custom log level manager used by C API.
*/
class CustomLogLevelManager {
protected:
log4cplus::thread::Mutex mtx;
bool pushed_methods;
std::map<LogLevel,tstring> ll2nm;
std::map<tstring,LogLevel> nm2ll;
public:
CustomLogLevelManager()
: pushed_methods (false)
{ }
bool add(LogLevel ll, tstring const &nm)
{
log4cplus::thread::MutexGuard guard (mtx);
if (! pushed_methods)
{
pushed_methods = true;
getLogLevelManager().pushToStringMethod(customToStringMethod);
getLogLevelManager().pushFromStringMethod(customFromStringMethod);
}
auto i = ll2nm.lower_bound(ll);
if( ( i != ll2nm.end() ) && ( i->first == ll ) && ( i->second != nm ) )
return false;
auto j = nm2ll.lower_bound(nm);
if( ( j != nm2ll.end() ) && ( j->first == nm ) && ( j->second != ll ) )
return false;
// there is no else after return
ll2nm.insert( i, std::make_pair(ll, nm) );
nm2ll.insert( j, std::make_pair(nm, ll) );
return true;
}
bool remove(LogLevel ll, tstring const &nm)
{
log4cplus::thread::MutexGuard guard (mtx);
auto i = ll2nm.find(ll);
auto j = nm2ll.find(nm);
if( ( i != ll2nm.end() ) && ( j != nm2ll.end() ) &&
( i->first == j->second ) && ( i->second == j->first ) ) {
ll2nm.erase(i);
nm2ll.erase(j);
return true;
}
// there is no else after return
return false;
}
protected:
tstring const & customToStringMethodWorker(LogLevel ll)
{
log4cplus::thread::MutexGuard guard (mtx);
auto i = ll2nm.find(ll);
if( i != ll2nm.end() )
return i->second;
return internal::empty_str;
}
LogLevel customFromStringMethodWorker(const tstring& nm)
{
log4cplus::thread::MutexGuard guard (mtx);
auto i = nm2ll.find(nm);
if( i != nm2ll.end() )
return i->second;
return NOT_SET_LOG_LEVEL;
}
LOG4CPLUS_PRIVATE static tstring const & customToStringMethod(LogLevel ll);
LOG4CPLUS_PRIVATE static LogLevel customFromStringMethod(const tstring& nm);
};
LOG4CPLUS_PRIVATE CustomLogLevelManager & getCustomLogLevelManager ();
} // namespace internal
} // namespace log4cplus
#endif // LOG4CPLUS_INTERNAL_CUSTOMLOGLEVELMANAGER_HEADER
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