3

我可以找到 log4j 的解决方案，但不能找到 log4cxx。

4

2 回答 2

2

我有一个简单的解决方案。

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[0m") // red
#define LOG_FATAL(msg) LOG4CXX_FATAL(logger, "\33[0;41m" << msg << "\33[0m") // red
于 2013-07-30T06:19:23.347 回答
1

当谷歌把我带到这里时，我发布了我的解决方案，希望它能帮助别人。

我为 c++ 实现了我为 log4j 找到的这个Layout解决方案，创建了一个继承自PatternLayout. 它只是将标准的输出包装log4cxx::PatternLayout在颜色转义序列中。

我将以下内容放入 cpp 文件中（如果您愿意，可以将其拆分为 hpp/cpp）：

#include <log4cxx/helpers/pool.h>
#include <log4cxx/patternlayout.h>
namespace log4cxx{
class LOG4CXX_EXPORT ColorPatternLayout : public log4cxx::PatternLayout
{
public:
    DECLARE_LOG4CXX_OBJECT(ColorPatternLayout)
    BEGIN_LOG4CXX_CAST_MAP()
        LOG4CXX_CAST_ENTRY(ColorPatternLayout)
        LOG4CXX_CAST_ENTRY_CHAIN(Layout)
    END_LOG4CXX_CAST_MAP()

    ColorPatternLayout();
    ColorPatternLayout(const log4cxx::LogString &s);
    virtual void format(log4cxx::LogString &output, const log4cxx::spi::LoggingEventPtr &event, log4cxx::helpers::Pool &pool) const override;
};
LOG4CXX_PTR_DEF(ColorPatternLayout);
}

using namespace log4cxx;
IMPLEMENT_LOG4CXX_OBJECT(ColorPatternLayout);
ColorPatternLayout::ColorPatternLayout() : log4cxx::PatternLayout(){}

ColorPatternLayout::ColorPatternLayout(const LogString &s): log4cxx::PatternLayout(s){}

void ColorPatternLayout::format(LogString &output, const spi::LoggingEventPtr &event, helpers::Pool &pool) const
{
    log4cxx::LogString tmp;
    log4cxx::PatternLayout::format(tmp,event,pool);
    log4cxx::LevelPtr lvl = event->getLevel();
    switch (lvl->toInt()){
    case log4cxx::Level::FATAL_INT:
        output.append("\u001b[0;41m"); //red BG
        break;
    case log4cxx::Level::ERROR_INT:
        output.append("\u001b[0;31m"); // red FG
        break;
    case log4cxx::Level::WARN_INT:
        output.append("\u001b[0;33m"); //Yellow FG
        break;
    case log4cxx::Level::INFO_INT:
        output.append("\u001b[1m"); // Bright
        break;
    case log4cxx::Level::DEBUG_INT:
        output.append("\u001b[2;32m"); // Green FG
        break;
    case log4cxx::Level::TRACE_INT:
        output.append("\u001b[0;30m"); // Black FG
        break;
    default:
        break;
    }
    output.append(tmp);
    output.append("\u001b[m");
}

当然，配置您的记录器以使用此布局类，并像使用 PatterLayout 一样使用它，例如在log4cxx.properties文件中：

log4j.appender.EXAMPLE=org.apache.log4j.ConsoleAppender
log4j.appender.EXAMPLE.layout=org.apache.log4j.ColorPatternLayout
log4j.appender.EXAMPLE.layout.ConversionPattern=%-5p %c %x - %m%n
于 2018-06-06T16:44:58.743 回答