Questions tagged [log4cxx]

Apache log4cxx is a logging framework for C++ patterned after Apache log4j. Apache log4cxx uses Apache Portable Runtime for most platform-specific code and should be usable on any platform supported by APR. Apache log4cxx is licensed under the Apache License, an open source license certified by the Open Source Initiative.

Apache log4cxx is a logging framework for C++ patterned after Apache log4j. Apache log4cxx uses Apache Portable Runtime for most platform-specific code and should be usable on any platform supported by APR. Apache log4cxx is licensed under the Apache License, an open source license certified by the Open Source Initiative.

Almost every large application includes its own logging or tracing API. Inserting log statements into code is a low-tech method for debugging it. It may also be the only way because debuggers are not always available or applicable. This is usually the case for multithreaded applications and distributed applications at large.

Experience indicates that logging is an important component of the development cycle. It offeres several advantages. It provides precise context about a run of the application. Once inserted into the code, the generation of logging output requires no human intervention. Moreover, log output can be saved in persistent medium to be studied at a later time. In addition to its use in the development cycle, a sufficiently rich logging package can also be viewed as an auditing tool.

Logging does have its drawbacks. It can slow down an application. If too verbose, it can cause scrolling blindness. To alleviate these concerns, log4cxx is designed to be reliable, fast and extensible. Since logging is rarely the main focus of an application, the log4cxx API strives to be simple to understand and to use.

Official Website: http://logging.apache.org/log4cxx/

Useful Links:

178 questions
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Add process id to log file name in log4cxx

In log4net i can easily set process id to to log file name from config easily Can i do the…
Novalis
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log4cxx config file syntax

I'm just discovering log4cxx logging framework. It seems there are two different syntaxes for writing config file: xml manner key-value manner Is there a difference or a best practice in this two approaches?
Guillaume Paris
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Accessing log4cxx object initiailized in configuartion file

New to log4cxx. I have a configuration file where I define the log4cxx configuration. That works fine. What I want to do now is access an object defined in that config file and extend it's functionality, e.g. say I have a Log4Cxx implementation…
Rob_BG
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log4cxx set file permissions for log files

I am trying to configure log4cxx using following properties file as per this log4j config. log4j.rootLogger=INFO,…
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Custom overload operator<< with log4cxx

I have the following code: namespace foo { namespace bar { class Baz { protected: void print(std::ostream&); public: friend std::ostream& operator<<(std::ostream& o, Baz& b) { b.print(o); return o; } }}} Then in another…
greywolf82
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Log4cxx and full file paths when used with CMake

I'm using Log4Cxx for logging and I'd like to use the %l directive in order to see where is the log trace (filename and line number). The problem I have is that I'm also using CMake that provides full path names to the compiler. This causes that log…
tonicebrian
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Could not open file [TESTXML.xml]

I am using Visual Studio 2015. Currently I am working on a wrapper for log4cxx so that any other logging library can be used later down the line. I am using DOMConfigurator to parse an XML configuration file. Basically my function wraps…
Doug
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What are the benefits of using log4cxx over plain syslog()?

I've had log4cxx recommended to me as a good way of generating log messages from C++ applications. However, plain old UNIX syslog() calls do let me output to files, or over the network, and have all the usual DEBUG/INFO/WARN/ERROR levels. log4cxx…
kdt
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Linker Error with log4cxx

I'd like to use Apache log4cxx and am running into a problem. I'm running on Debian 8 and installed log4cxx using apt-get install liblog4cxx10-dev I have embedded one of the code snippets in the Documentation Page into the code below: #include…
andand
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Socket is open after process, that opened it finished

After closing client socket on sever side and exit application, socket still open for some time. I can see it via netstat Every 0.1s: netstat -tuplna | grep 6676 tcp 0 0 127.0.0.1:6676 127.0.0.1:36065 TIME_WAIT …
AlexKutsan
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log4cxx: Segmentation fault in apr_pool_create_ex

I need to use log4cxx for a C++ project. However I fail to understand the basic setup of this library. Here is my minimal attempt: $ cat logger.cpp #include #include #include…
malat
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building log4cxx under visual studio 2013

I am trying to build log4cxx version 0.10.0 under Visual Studio 2013. I have done all the fixes as specified in building log4cxx in vs 2010 c++. However, it is now failing at the link stage, when trying to create log4cxx.lib, with the following…
Simon Callan
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How to give environmental variable path for file appender in configuration file in log4cxx

I have different logs locations in development and in production, they also may be different platforms, so I want to configure the logs just one time using a environment variable. Possible locations: C:/logs/ T:/logs/ /var/logs/ In this…
Javier Mr
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Can I configure log4cxx both using a property file and runtime configuration?

I would like to read in a configuration file to log4cxx, but during runtime, I would like to modify the appenders/loggers. Can I do this? Example log4cxx file: log4j.rootLogger=all, console,…
Jason
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Turn off logging with log4cxx for minimum overhead

I use log4cxx for logging. However, logging may introduce some performance overhead which I need to minimize. How do I turn off logging (at runtime or compile time) so that the overhead is minimized - short of removing all log statements from the…
clstaudt
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