java - 找不到 log4j siftAppender 输出日志

Question

我关注了这个tutorial

我有这段代码，但没有写入日志文件。

我错过了什么？

这是我的 code : https://github.com/elad2109/log4j_sift/blob/master/src/main/java/com/waze/rr_logger/SiftExampleLog4j.java

    import org.apache.log4j.Logger;
    import org.slf4j.LoggerFactory;


public class SiftExampleLog4j {

    static org.apache.log4j.Logger logger = Logger.getLogger(SiftExampleLog4j.class);

    public void log() {
        BasicConfigurator.configure();

        org.apache.log4j.MDC.put("session_id","MyGooApp");

        logger.error("example1");

        org.apache.log4j.MDC.put("session_id","MyFooApp");

        logger.error("example2");
    }
}

log4j.properties

    log4j.rootLogger=INFO, sift, osgi:VmLogAppender

# Sift appender
log4j.appender.sift=org.apache.log4j.sift.MDCSiftingAppender
log4j.appender.sift.key=session_id
log4j.appender.sift.default=no_session_id
log4j.appender.sift.appender=org.apache.log4j.FileAppender
log4j.appender.sift.appender.layout=org.apache.log4j.PatternLayout
log4j.appender.sift.appender.layout.ConversionPattern=%d{ISO8601} | %-5.5p | %-16.16t | %-32.32c{1} | %m%n
log4j.appender.sift.appender.file=$\\{session_id\\}.log
log4j.appender.sift.appender.append=true

我希望看到 2 个输出日志文件:MyGooApp.log 和 MyFooApp.log。但是我到处都找不到它们。

更新

我试过这个:

log4j.appender.sift.appender.file=./$\\{session_id\\}.log

但我现在看到了输出文件:

Answer 1

我已经使用 logback 完成了。现在分享给大家。

筛选示例.java

package chapters.appenders.sift;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.joran.JoranConfigurator;
import ch.qos.logback.core.joran.spi.JoranException;

public class SiftExample {
    public static void main(String[] args) throws JoranException {
        String configFile = "F://logbackfile/logback.xml";

        LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
        JoranConfigurator configurator = new JoranConfigurator();

        Logger logger = LoggerFactory.getLogger(SiftExample.class);
        logger.debug("Application started");

        lc.reset();
        lc.putProperty("appname", "MyGooApp");
        configurator.setContext(lc);
        configurator.doConfigure(configFile);
        logger.debug("Alice says hello");

        lc.reset();
        lc.putProperty("appname", "MyFooApp");
        configurator.setContext(lc);
        configurator.doConfigure(configFile);
        logger.debug("Bob says hi");
    }

    static void usage(String msg) {
        System.err.println(msg);
        System.err.println("Usage: java " + SiftExample.class.getName() + " configFile\n" + "   configFile a logback configuration file");
        System.exit(1);
    }
}

logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <property name="DEV_HOME" value="F://logbackfile" />
    <appender name="FILE-AUDIT"
        class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${DEV_HOME}/${appname}.log</file>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <Pattern>
                %d{yyyy-MM-dd HH:mm:ss} - %msg%n
            </Pattern>
        </encoder>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- rollover daily -->
            <fileNamePattern>${DEV_HOME}/archived/debug.%d{yyyy-MM-dd}.%i.log
                        </fileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>10MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
    </appender>

    <logger name="chapters.appenders.sift" level="debug"
        additivity="false">
        <appender-ref ref="FILE-AUDIT" />
    </logger>
    <root level="error">
        <appender-ref ref="FILE-AUDIT" />
    </root>
</configuration>

输出:

MyGooApp.log

2016-05-09 01:35:57 - Alice says hello

MyFooApp.log

2016-05-09 01:35:57 - Bob says hi

---

注意:请不要忘记这样做

1. 包名称 chapters.appenders.sift在 logback.xml 中添加为 <logger name="chapters.appenders.sift" level="debug" ...