Logback – 各スレッドの異なるログファイル

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

    <property name="USER__HOME" value="C:\\logs\\analyzer"/>

    <appender name="FILE-THREAD" class="ch.qos.logback.classic.sift.SiftingAppender">

        <!-- This is MDC value -->
        <!-- We will assign a value to 'logFileName' via Java code -->
        <discriminator>
            <key>logFileName</key>
            <defaultValue>head0</defaultValue>
        </discriminator>

        <sift>

          <!-- A standard RollingFileAppender, the log file is based on 'logFileName' at runtime  -->
          <appender name="FILE-${logFileName}"
            class="ch.qos.logback.core.rolling.RollingFileAppender">
            <file>${USER__HOME}/${logFileName}.log</file>

            <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
                <Pattern>
                    %d{yyyy-MM-dd HH:mm:ss} %mdc[%thread]%level %logger{35} - %msg%n
                </Pattern>
            </encoder>

            <rollingPolicy
                class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
                <FileNamePattern>${USER__HOME}/${logFileName}.%i.log.zip
                </FileNamePattern>
                <MinIndex>1</MinIndex>
                <MaxIndex>10</MaxIndex>
            </rollingPolicy>

            <triggeringPolicy
                class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
                <MaxFileSize>10MB</MaxFileSize>
            </triggeringPolicy>

          </appender>

        </sift>
    </appender>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>
                %-5level %logger{36} - %msg%n
            </Pattern>
        </layout>
    </appender>

    <logger name="com.mkyong.analyzer.core" level="debug"
        additivity="false">
        <appender-ref ref="FILE-THREAD"/>
        <appender-ref ref="STDOUT"/>
    </logger>

    <root level="error">
        <appender-ref ref="STDOUT"/>
    </root>

</configuration>

package com.mkyong.analyzer.core;

import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;

public class Head implements Runnable {

    static Logger logger = LoggerFactory.getLogger(Head.class);

    private String name;

    @Override
    public void run() {

        MDC.put('logFileName', getName());

        logger.debug("hello");

       //remember remove this
        MDC.remove('logFileName');

    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

}

    int count = 1;
    while(count<=10){
        Head head = new Head();
        head.setName("head-" + count);
        threadPools.execute(head);
        count++;
    }