log4cxx

log4cxx — is it possible to configure a custom appender with custom arguments from a config file?

由 筅森魡賤 提交于 2019-12-12 02:53:31
问题 I need to write a custom appender in log4cxx. This answer describes how to do it. In Java, in log4j, it is possible for a custom appender to devise custom parameters. I add a property and a getter and setter: private int myParameter = 0; public void setMyParameter(int p) { myParameter = p; } public int getMyParameter() { return myParameter; } Then I can use myParameter in configuration file, and the framework somehow knows how to configure my appender with it. Question: does log4cxx have a

Using Log4j CompositeTriggeringPolicy feature with log4CXX

由 人盡茶涼 提交于 2019-12-11 07:23:35
问题 I would like to combine both rolling time and rolling size in an appender, it seems there is no composite rolling in log4cxx, am I right ? 回答1: No, there isn't. In fact, there is no such combined policy implemented in log4j, either, so it was not transferred to log4cxx. I once had a task of writing such mixed-policy rolling file appender (in log4j, though). I did this by overriding FileAppender , esp. the method // log4j void setFile(String fileName, boolean append, boolean bufferedIO, int

How to set colour of console output of log4cxx?

由 喜欢而已 提交于 2019-12-10 19:22:10
问题 I can find solution for log4j, but not for log4cxx. 回答1: I got a simple solution. extern LoggerPtr logger; #define LOG_TRACE(msg) LOG4CXX_TRACE(logger, msg) #define LOG_DEBUG(msg) LOG4CXX_DEBUG(logger, msg) #define LOG_INFO(msg) LOG4CXX_INFO(logger, msg) #define LOG_INFO_H(msg) LOG4CXX_INFO(logger, "\33[0;42m" << msg << "\33[0m") // green #define LOG_WARN(msg) LOG4CXX_WARN(logger, "\33[0;43m" << msg << "\33[0m") // yellow #define LOG_ERROR(msg) LOG4CXX_ERROR(logger, "\33[0;41m" << msg << "\33

How can I resolve single symbol link error when dynamically linking XCode project to lib4cxx library?

由 瘦欲@ 提交于 2019-12-07 13:46:32
I'm writing in C++ under XCode 4.6 on Mountain Lion. I'm trying to add and use the Apache log4cxx library. I installed the library this morning via Brew. I'm linking against liblog4cxx.dylib. I'm getting a link error that just one symbol can't be found: Undefined symbols for architecture x86_64: "log4cxx::Logger::forcedLog(log4cxx::helpers::ObjectPtrT const&, std::__1::basic_string, std::__1::allocator > const&, log4cxx::spi::LocationInfo const&) const", referenced from: I know it's finding the library file because if I remove it, I get lots more undefined symbol errors relating to log4cxx.

different loggers used with libraries

由 核能气质少年 提交于 2019-12-05 05:20:17
My problem concerns logging of library classes (classes that are used inside libraries), We are currently using log4cxx but the log4j library implements the same concepts. Say i have a process that have several entities, A,B and C. Each of them use many different classes and functions, clearly separated in the code. A,B and C use many library classes, functions, objects, resources and sometimes even globals (legacy code, nothing i can do about it...) - let us call them all foo Logging A,B and C turned out to be a performance issue , the log gets blasted when we set the log level to debug.

How to log Process id using Log4cxx or log4j

由 半城伤御伤魂 提交于 2019-12-04 18:52:44
问题 I am using log4cxx my project and i can able to log current thread id using [%t] marker, how to log process id in it or log4j?. I am using ConversionPattern & xml based configuration file. Thanks, 回答1: Based on the above answers, I'm going to do this in log4j as follows: import java.lang.management.*; import org.apache.log4j.MDC; private String getPID() { RuntimeMXBean rt = ManagementFactory.getRuntimeMXBean(); return rt.getName(); } private void configLog4j() { // call this from somewhere

C++ Logging Library Setup

由 荒凉一梦 提交于 2019-12-03 13:46:45
I've been trying for about 2 weeks now to get a logging library to work with. I've tried Log4cxx, Log4cpp, log4cplus and boost.log. The problem isn't that none of these work for me, it's that I can't figure out how to get them to work at all. I would really like to use log4cxx since I'm working with log4j/logback at work, but I haven't been able to get any of the libraries based on log4j to build. I've been able to build and use the boost library, but boost.log gives me all kinds of linker errors no matter what I try. If anyone could direct me to a step-by-step guide to get one of these

How to log Process id using Log4cxx or log4j

由 て烟熏妆下的殇ゞ 提交于 2019-12-03 12:28:50
I am using log4cxx my project and i can able to log current thread id using [%t] marker, how to log process id in it or log4j?. I am using ConversionPattern & xml based configuration file. Thanks, skiphoppy Based on the above answers, I'm going to do this in log4j as follows: import java.lang.management.*; import org.apache.log4j.MDC; private String getPID() { RuntimeMXBean rt = ManagementFactory.getRuntimeMXBean(); return rt.getName(); } private void configLog4j() { // call this from somewhere before you start logging MDC.put("PID", getPID()); } Then in my log4j.properties: log4j.appender

How to keep single file and overwrite the contents in the same file using log4cxx?

由 会有一股神秘感。 提交于 2019-12-02 07:14:59
In my application , Multiple threads log the data in the same file .if the file size exceeds the limit , then i have to delete the particular record in file and move every contents upwards. can I do this in Log4cxx?if so ,reply your thoughts.. Thanks.. This sample will solve your problem : log4j.rootLogger=debug, stdout, R log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout # Pattern to output the caller's file name and line number. log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n log4j.appender.R=org.apache

Log to different file with log4cxx

由 限于喜欢 提交于 2019-12-01 18:21:25
问题 I want to log to different files in my code. How can i do that in Log4cxx with xml configuration or programatically in code... Suppose that I have 1.k,k+1,..n components. They run in the same application I want component k log to Logger-k, k+1 component log to Logger-k+1 at the same time Update: Logger.addAppender() approach: log4cxx::helpers::Pool p; std::string paramAppender = "appxNormalAppender"; std::string paramFileName = "\\Logs\\MyLog.txt"; LOG4CXX_DECODE_CHAR(logAppender,
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