System.setProperty("logging.config", "classpath:org/geekbang/time/commonmistakes/logging/duplicate/multiplelevelsfilter.xml");

package org.geekbang.time.commonmistakes.logging.duplicate;

import ch.qos.logback.classic.Level;

import ch.qos.logback.classic.spi.ILoggingEvent;

import ch.qos.logback.core.filter.Filter;

import ch.qos.logback.core.spi.FilterReply;

import lombok.Getter;

import lombok.Setter;

import org.springframework.util.StringUtils;

import java.util.Arrays;

import java.util.List;

import java.util.stream.Collectors;

public class MultipleLevelsFilter extends Filter<ILoggingEvent> {

@Getter

@Setter

private String levels;

private List<Integer> levelList;

@Override

public FilterReply decide(ILoggingEvent event) {

if (levelList == null && !StringUtils.isEmpty(levels)) {

levelList = Arrays.asList(levels.split("\\|")).stream()

.map(item -> Level.valueOf(item))

.map(level -> level.toInt())

.collect(Collectors.toList());

}

if (levelList.contains(event.getLevel().toInt()))

return FilterReply.ACCEPT;

else

return FilterReply.DENY;

}

}

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

<configuration>

<property name="logDir" value="./logs"/>

<property name="app.name" value="common-mistakes"/>

<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">

<layout class="ch.qos.logback.classic.PatternLayout">

<pattern>[%d{yyyy-MM-dd HH:mm:ss.SSS}] [%thread] [%-5level] [%logger{40}:%line] - %msg%n</pattern>

</layout>

</appender>

<appender name="INFO_FILE" class="ch.qos.logback.core.FileAppender">

<File>${logDir}/${app.name}_info.log</File>

<filter class="org.geekbang.time.commonmistakes.logging.duplicate.MultipleLevelsFilter">

<levels>INFO|WARN</levels>

</filter>

<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">

<pattern>[%d{yyyy-MM-dd HH:mm:ss.SSS}] [%thread] [%-5level] [%logger{40}:%line] - %msg%n</pattern>

<charset>UTF-8</charset>

</encoder>

</appender>

<appender name="ERROR_FILE" class="ch.qos.logback.core.FileAppender">

<File>${logDir}/${app.name}_error.log</File>

<filter class="ch.qos.logback.classic.filter.LevelFilter">

<level>ERROR</level>

<onMatch>ACCEPT</onMatch>

<onMismatch>DENY</onMismatch>

</filter>

<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">

<pattern>[%d{yyyy-MM-dd HH:mm:ss.SSS}] [%thread] [%-5level] [%logger{40}:%line] - %msg%n</pattern>

<charset>UTF-8</charset>

</encoder>

</appender>

<root level="INFO">

<appender-ref ref="CONSOLE"/>

<appender-ref ref="INFO_FILE"/>

<appender-ref ref="ERROR_FILE"/>

</root>

</configuration>