loglog.h

功能非常强的写日志程序

/*
 * Copyright 2003,2004 The Apache Software Foundation.
 * 
 * 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.
 */
 
#ifndef _LOG4CXX_HELPERS_LOG_LOG_H
#define _LOG4CXX_HELPERS_LOG_LOG_H

#include <log4cxx/helpers/tchar.h>
#include <log4cxx/helpers/exception.h>

namespace log4cxx
{
	namespace helpers
	{
		/**
		This class used to output log statements from within the log4cxx package.

		<p>Log4cxx components cannot make log4cxx logging calls. However, it is
		sometimes useful for the user to learn about what log4cxx is
		doing. You can enable log4cxx internal logging by calling the
		<b>#setInternalDebugging</b> method.

		<p>All log4cxx internal debug calls go to standard output
		where as internal error messages are sent to
		standard error output. All internal messages are prepended with
		the string "log4cxx: ".
		*/
		class LOG4CXX_EXPORT LogLog
		{
		public:
			/**
			Defining this value makes log4j print log4j-internal debug
			statements to <code>System.out</code>.

			<p> The value of this string is <b>log4j.debug</b>.

			<p>Note that the search for all option names is case sensitive.  */
			static String DEBUG_KEY;



		protected:
			static bool debugEnabled;  

		  /**
			 In quietMode not even errors generate any output.
		   */
			static bool quietMode;

		public:
			/**
			Allows to enable/disable log4cxx internal logging.
			*/
			static void setInternalDebugging(bool enabled);
			
			/**
			This method is used to output log4cxx internal debug
			statements. Output goes to the standard output.
			*/
			static void debug(const String& msg);
			static void debug(const String& msg, Exception& e);
			
			/**
			This method is used to output log4cxx internal error
			statements. There is no way to disable error statements.
			Output goes to stderr.
			*/
			static void error(const String& msg);
			static void error(const String& msg, Exception& e);

			/**
			In quite mode LogLog generates strictly no output, not even
			for errors. 

			@param quietMode <code>true</code> for no output.
			*/
			static void setQuietMode(bool quietMode);

			/**
			This method is used to output log4cxx internal warning
			statements. There is no way to disable warning statements.
			Output goes to stderr.
			*/
			static void warn(const String&  msg);
			static void warn(const String&  msg, Exception& e);
		};
	}  // namespace helpers
}; // namespace log4cxx

#define LOGLOG_DEBUG(log) { \
	StringBuffer oss; \
	oss << log; \
	log4cxx::helpers::LogLog::debug(oss.str()) ; }

#define LOGLOG_WARN(log) { \
	StringBuffer oss; \
	oss << log; \
	log4cxx::helpers::LogLog::warn(oss.str()) ; }

#define LOGLOG_ERROR(log) { \
	StringBuffer oss; \
	oss << log; \
	log4cxx::helpers::LogLog::warn(oss.str()); }

#endif //_LOG4CXX_HELPERS_LOG_LOG_H