log4cplus | arbitrarily granular control over log management
kandi X-RAY | log4cplus Summary
kandi X-RAY | log4cplus Summary
[log4cplus] is a simple to use C++17 logging API providing thread—safe, flexible, and arbitrarily granular control over log management and configuration. It is modeled after the Java log4j API.
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Trending Discussions on log4cplus
QUESTION
I'm looking for tips to find a direction where I have to investigate.
I have a little c++ project that works well both on my old cygwin (3.0.4(0.338/5/3)) and on a debian distrib (thanks to Posix) In this project I use some libraries like log4cplus (cxxTest, rapidJson, ...)
Now I had to upgrade my cygwin. So I install a new version of cygwin (3.3.4(0.341/5/3)) totally separated from the previous one. With this new cygwin, I have 2 problems:
- The real problem : my program sometimes (2 of 10 times) work well without problem. And very often the program did nothing and end without any information
- The second problem is that gdb (GNU gdb (GDB) (Cygwin 10.2-1) 10.2) : won't debug my program. Each time I try I have :
ANSWER
Answered 2022-Mar-23 at 07:41For every people who read this thread in future :
I don't really find a solution in Cygwin, but like @Alan Birtles mention : Use WSL (or another updated solution). It work like a charm. thanks to microsoft ;)
QUESTION
I am very confused about the DCMTK > 3.6.0 logging mechanism oflog/log4cplus
I simply need my code to specify the logname for dcmtk to log into. How is that done ?
Thanks!
...ANSWER
Answered 2021-May-07 at 08:51The answer can be found in DCMTK's "logger howto": https://support.dcmtk.org/redmine/projects/dcmtk/wiki/Howto_LogProgram#Redirecting-log-output-to-a-file
QUESTION
I am attempting to log message via log4cplus::SocketAppender
. These messages are serialized using google protobuf.
I have no problem sending logs with small size. However, if I attempt to log messages with character length greater than 8000, I get following error message:
log4cplus:ERROR SocketBuffer::appendString()- Attempt to write beyond end of buffer
My current workaround is breaking these buffers into smaller chunks before sending it across the network.
Here is a snippet of my property file (named test.properties):
...ANSWER
Answered 2021-Feb-23 at 06:42If your MyBuffer
is binary data then you are using log4cplus wrong. It is meant to log text strings, not binary data.
Also, there is a limit to the length of a buffer to 8*1024
bytes. See socketappender.h
.
QUESTION
I am using log4cplus
, and my misra-checks for something as innocent-looking as
ANSWER
Answered 2021-Jan-17 at 09:10I had a look at LOG4CPLUS_INFO
and that is a macro defined as:
QUESTION
I am trying to compile DCMTK from the source through MinGW32-w64 and Cmake.
I am getting these errors after mingw32-make
command:
ANSWER
Answered 2020-Apr-09 at 19:35The MinGW headers do not make all of the Win32 API functions visible by default. Add a line like add_compile_definitions (_WIN32_WINNT=0x600)
to CMakeLists.txt
file to make the Vista and later API visible. That should fix your compilation.
QUESTION
In our project we're using log4cplus indirectly: It is being used in a library that we statically link to, and that project is normally also compiled as a static lib and liked to from our executable. Everything here is Windows and Visual Studio based.
As we've been experiencing problem with application shutdown, I found that we must initialize log4cplus in our main()
function, which solved the problem.
However, the application we're maintaining is - unfortunately - based on ACF (Advanced Component Framework). That means, the static lib (that links to the static lib that links to log4cplus) can be once more linked with a DLL that is then loaded by an application called Compositor during design time. (In Compositor, we can create the target application - which uses the static lib - in a high-level "component-based" fashion...). Now, the problem is that the Compositer would not close properly any more.
When it hangs after closing the main window, we can see the following callstack:
...ANSWER
Answered 2020-Mar-24 at 09:03As it has been mentioned in @RbMm's comments, the reason why initializing log4cplus in DllMain
does not work is that this function is executed inside the "loader lock" - cf. here or here.
The solution is to find a function in the DLL that is executed from the loading application's main thread, and initialize log4cplus there.
In case of ACF's Compositor, it is the package export function that is called first. Normally, it is wrapped as a macro in ACF packages, i.e. I_EXPORT_PACKAGE
. Unrolling that macro allows for entering the following code:
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Install log4cplus
[log4cplus] supports multiple build systems (GNU Autoconf/Automake/Libtool aka Autotools, CMake and Visual Studio solution and project files). Autotools is considered the primary build system on Unix—like platforms. However, CMake should still be usable on Unix—like platforms as well. On Windows, it depends on compiler and tool-chain that you want to use. When using Visual Studio, use Visual Studio solution and project files. However, CMake build system should still work and produce useful results. When using some form of MinGW64 tool-chain, the CMake build system is considered primary and the Autotools based build system is unsupported. Use the MinGW Makefiles option and build with mingw-make (or similar). The MSYS Makefiles option is untested and unsupported.
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