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:

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log4cxx access exception using << operator and macro

I tried to encapsulate using log4cxx in our code by using #define directives and macros. The code compiles but when running I get Access violation, because I believe the stream object is not correctly initialized. The header file which tries to make…
Sam Goldberg
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`cat` analogue for highlighting different matches in different colors

My question is similar to this one: Syntax highlighting/colorizing cat . But not exactly the same. A tool, doing this would be great: cat a file highlight word x in color cx highlight word y in color cy etc. Does anyone know something like…
Kiril Kirov
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C++ Application Project Template - log4cxx Issue

Hoping someone can help me with my build issue I'm trying to create a new project with this C++ Application Project Template but I can't get it to build properly as am getting issues with log4cxx. See below make[1]: Entering directory…
Mark Davidson
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Using log4cxx with a Qt library

Good afternoon guys, I'm working on a project that is using a Qt library in Visual Studio 2008. In this project I am using log4cxx 0.10.0 which is working fine. However, I am unable to get it to display in (this projects) console. I believe the…
fisherml
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log4cxx configureandwatch no effect?

I have a problem with the configure functionnality. I want to reload my configuration file when I click on a button. I call the function std::string filepath =…
Shaina
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How to use an output stream operator defined in a header

I would like to be able to append the content of any std::vector to an output stream. I've found this code: #ifndef DEBUG_H_ #define DEBUG_H_ #include template < class T > std::ostream& operator << (std::ostream& os, const…
clstaudt
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How to statically link log4cxx in linux

It look like Visual studio has a solution #define LOG4CXX_STATIC. How about eclipse in Linux? This is the follow up question of my last question
Bryan Fok
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How to make C++ logging more concise

I am using log4cxx for logging in C++ projects. Currently, my log calls look like LOG4CXX_INFO(log4cxx::Logger::getRootLogger(), "parsed " << lc << " lines"); This is still too verbose and hard to remember. Ideally, a logging statement would look…
clstaudt
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Configuring Visual Studio 2008 to use log4cxx in programs/libs

I am a beginner in C++. I am compiling my school project which uses log4cxx. Luckily i found a already built version for visual c++ 2008 in this site. After downloading the files, I did the following Tools->Options->VC++Directories->Library Files,…
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Building log4cxx on visual 2005

When I build the log4cxx on Visual 2005 according to instructions http://logging.apache.org/log4cxx/building/vstudio.html, I am getting error below; 1>------ Build started: Project: apr, Configuration: Debug Win32…
retto
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How to force log4cxx to write certain string on top of the log file?

I want that everytime when log4cxx creates new log file it would write special string on top (as the first message) of the log file. How can I force it to do so ? Thank You!
romsky
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Saving logs into a file by using Chainsaw

I've implement a client logger with log4cxx and I use Chainsaw to monitor logs which came from clients. Is there a way like a configuration xml to save logs into a file
Riffraff
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log4cxx builds and compiles but when run gets UnsatisfiedLinkException

I've added log4cxx logging to a small C++ wrapper/JNI bridge. Originally it used a ton of printf statements, but as this started to get used more and more the console started to clog up, so i wanted to move to log4cxx instead. The code compiles and…
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