POCO: 日志的使用

来源：互联网发布：excel显示无法粘贴数据编辑：程序博客网时间：2024/06/05 09:08

最简单的使用

#include "Poco/Logger.h"#include "Poco/AutoPtr.h"#include "Poco/ConsoleChannel.h"int main(){    /* 1.获取 root logger */    auto &logger = Poco::Logger::root();    /* 2.设置管道 */    Poco::AutoPtr<Poco::ConsoleChannel> consoleChannel(new Poco::ConsoleChannel);    logger.setChannel(consoleChannel);    /* 3.打印日志 */    poco_error(logger, "This is an error message");    return 0;}

利用 Formatter 格式化输出

#include "Poco/Logger.h"#include "Poco/AutoPtr.h"#include "Poco/ConsoleChannel.h"#include "Poco/PatternFormatter.h"#include "Poco/FormattingChannel.h"int main(){    /* 1.获取 root logger */    auto &logger = Poco::Logger::root();    /* 2.设置管道 */    /* 2.1 创建控制台管道 */    Poco::AutoPtr<Poco::ConsoleChannel> consoleChannel(new Poco::ConsoleChannel);    /* 2.2 创建 Formatter */    // 关于格式化控制符的说明可以参见 PatternFormatter.h 中的描述    Poco::AutoPtr<Poco::PatternFormatter> patternFormatter(        new Poco::PatternFormatter("[%H:%M:%S] [%U(%u)] %p: %t"));    patternFormatter->setProperty("times", "local");  // 格式化中的时间显示为本地时间    /* 2.3 创建 Formatting Channel */    Poco::AutoPtr<Poco::FormattingChannel> formattingChannel(        new Poco::FormattingChannel(patternFormatter, consoleChannel));    /* 2.4 将 Formatting Channel 设置给 logger */    logger.setChannel(formattingChannel);    /* 3.打印日志 */    poco_error(logger, "This is an error message");    return 0;}

从配置文件读取配置

关于如何写配置文件请见 LoggingConfigurator.h 中的描述。
关于如何写 FileChannel 请见 FileChannel.h 中的描述。

log.properties−−−−−−−−−−−−

logging.loggers.root.channel = splitterlogging.loggers.root.level = tracelogging.formatters.f1.class = PatternFormatterlogging.formatters.f1.pattern = [%H:%M:%S] [%U(%u)] %p: %tlogging.formatters.f1.times = locallogging.channels.c1.class = ConsoleChannellogging.channels.c1.formatter = f1logging.channels.c2.class = FileChannellogging.channels.c2.path = message.loglogging.channels.c2.formatter = f1logging.channels.c2.rotation = 10Klogging.channels.c2.archive = timestamplogging.channels.c2.times = locallogging.channels.c2.purgeCount = 10logging.channels.c2.compress = truelogging.channels.splitter.class = SplitterChannellogging.channels.splitter.channels = c1, c2

main.cpp−−−−−−−−

#include "Poco/AutoPtr.h"#include "Poco/Util/PropertyFileConfiguration.h"#include "Poco/Util/LoggingConfigurator.h"#include "Poco/Exception.h"#include "Poco/Logger.h"#include "Poco/PatternFormatter.h"int main(){    try    {        Poco::AutoPtr<Poco::Util::PropertyFileConfiguration> propertyFileConfiguration(            new Poco::Util::PropertyFileConfiguration("log.properties"));        Poco::Util::LoggingConfigurator().configure(propertyFileConfiguration);    }    catch (Poco::Exception &e)    {        std::cerr << e.displayText() << std::endl;        return -1;    }    auto &logger = Poco::Logger::root();    poco_error(logger, "This is an error message");    poco_debug(logger, "This is a debug message");    poco_fatal(logger, "This is a fatal error!");    system("pause");    return 0;}

阅读全文

1 0