log4cxx 使用代码进行配置_log4cxx0.10.0.1的dailyrollingfileappenderptr的activa-优快云博客

本文链接：https://blog.youkuaiyun.com/crazyhacking/article/details/45195313

这篇博客介绍了如何在C++中使用log4cxx库通过代码配置日志记录，包括FileAppender和SimpleLayout的设置，以及如何配置日志级别和回滚策略。示例代码展示了如何创建FileAppender，激活选项，并设置根日志器级别。

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（1）官网的一个例子

#include <log4cxx/logger.h>
#include <log4cxx/helpers/pool.h>
#include <log4cxx/basicconfigurator.h>
#include <log4cxx/fileappender.h>
#include <log4cxx/simplelayout.h>

int main() {
   log4cxx::FileAppender * fileAppender = new
log4cxx::FileAppender(log4cxx::LayoutPtr(new log4cxx::SimpleLayout()),
"logfile", false);

   log4cxx::helpers::Pool p;
   fileAppender->activateOptions(p);

   log4cxx::BasicConfigurator::configure(log4cxx::AppenderPtr(fileAppender));
   log4cxx::Logger::getRootLogger()->setLevel(log4cxx::Level::getDebug());
   log4cxx::LoggerPtr logger = log4cxx::Logger::getLogger("logger");

   LOG4CXX_INFO(logger,"Created FileAppender appender");

   return 0;
}

（2）一个只使用代码的例子dailyrollingfileappender(经过验证)

 ostringstream oss;
  oss << getpid();
  string pid= oss.str();
  MDC::put("pid", oss.str()); //使得layout中可以携带进程号信息

 PatternLayoutPtr layout = new PatternLayout();
        string conversionPattern = "[%p] %d %c %M - %m%n";
        layout->setConversionPattern(conversionPattern);
        // creates daily rolling file appender
        DailyRollingFileAppenderPtr rollingAppenderptr = new DailyRollingFileAppender();
        rollingAppenderptr->setFile("/opt/bre/LrSortService/log/LrSortService.log."+pid);
        rollingAppenderptr->setDatePattern("'.'yyyy-MM-dd");
        rollingAppenderptr->setLayout(layout);
        log4cxx::helpers::Pool p;
        rollingAppenderptr->activateOptions(p);

        // configures the root logger
        log4cxx::LoggerPtr logger = log4cxx::Logger::getRootLogger();
        logger->setLevel(log4cxx::Level::getDebug());
        logger->addAppender(rollingAppenderptr);

        LOG4CXX_INFO(logger,"Created FileAppender appender");

(3)一个例子。使用RollingFileAppender和 TimeBasedRollingPolicy（未经验证）

private static void log4jConfig(String actionName) {
    

    org.apache.log4j.Logger rootLogger = LogManager.getRootLogger();
    RollingFileAppender fileAppender =