Apache Log4cxx  Version 1.3.0
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ndc-example.cpp

This example shows how to add a context string to each logging message using the NDC.

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
#include <stdlib.h>
#include <log4cxx/logger.h>
#include <log4cxx/ndc.h>
#include <locale.h>
using namespace log4cxx;
int main()
{
setlocale(LC_ALL, ""); // Use the user-preferred locale
int result = EXIT_SUCCESS;
try
{
BasicConfigurator::configure();
LoggerPtr rootLogger = Logger::getRootLogger();
NDC context1("[outer]");
LOG4CXX_INFO(rootLogger, "info message"); // log entry contains "[outer]"
{
NDC context2("[inner]");
LOG4CXX_DEBUG(rootLogger, "debug message"); // log entry contains "[outer] [inner]"
}
LOG4CXX_WARN(rootLogger, "warn message"); // log entry contains "[outer]"
}
catch(std::exception&)
{
result = EXIT_FAILURE;
}
return result;
}
A Nested Diagnostic Context, or NDC in short, is an instrument to distinguish interleaved log output ...
Definition: ndc.h:79
#define LOG4CXX_WARN(logger, message)
Add a new logging event containing message to attached appender(s) if logger is enabled for WARN even...
Definition: log4cxx/logger.h:2351
#define LOG4CXX_INFO(logger, message)
Add a new logging event containing message to attached appender(s) if logger is enabled for INFO even...
Definition: log4cxx/logger.h:2307
#define LOG4CXX_DEBUG(logger, message)
Add a new logging event containing message to attached appender(s) if logger is enabled for DEBUG eve...
Definition: log4cxx/logger.h:2221
Definition: configuration.h:25
std::shared_ptr< Logger > LoggerPtr
Definition: defaultloggerfactory.h:27