logback:两个appender,多个记录器,不同级别

时间:2012-05-24 08:44:13

标签: java logging logback

我想在我的应用程序(Spring Integration),debug.log和main.log中有两个日志文件。我想在INFO级别运行main.log,在DEBUG级别运行debug.log。这对于appender上的过滤器是可行的。我想根据源记录不同级别的appender。换句话说

<logger name="org.springframework" level="ERROR">
    <appender-ref ref="main" />
</logger>
<logger name="org.springframework" level="DEBUG">
    <appender-ref ref="debug" />
</logger>
<logger name="com.myapp" level="INFO">
    <appender-ref ref="main" />
</logger>
<logger name="com.myapp" level="DEBUG">
    <appender-ref ref="debug" />
</logger>

总结一下:

  1. Spring记录器
    • main - &gt; ERROR
    • debug - &gt; DEBUG
  2. com.myapp logger
    • main - &gt; INFO
    • debug - &gt; DEBUG
  3. 因此我必须让记录器在DEBUG上运行,并且appender上的阈值过滤器不够精细。<​​/ p>

    更新为问题添加了清晰度

6 个答案:

答案 0 :(得分:50)

创建一个ThresholdLoggerFilter类,可以放在一个appender上,如:

<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
        <level>INFO</level>
    </filter>
    <filter class="com.myapp.ThresholdLoggerFilter">
        <logger>org.springframework</logger>
        <level>ERROR</level>
    </filter>
    </appender>

以下代码可以使用

package com.myapp;

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;

public class ThresholdLoggerFilter extends Filter<ILoggingEvent> {
    private Level level;
    private String logger;

    @Override
    public FilterReply decide(ILoggingEvent event) {
        if (!isStarted()) {
            return FilterReply.NEUTRAL;
        }

        if (!event.getLoggerName().startsWith(logger))
            return FilterReply.NEUTRAL;

        if (event.getLevel().isGreaterOrEqual(level)) {
            return FilterReply.NEUTRAL;
        } else {
            return FilterReply.DENY;
        }
    }

    public void setLevel(Level level) {
        this.level = level;
    }

    public void setLogger(String logger) {
        this.logger = logger;
    }

    public void start() {
        if (this.level != null && this.logger != null) {
            super.start();
        }
    }
}

答案 1 :(得分:16)

如果您愿意从根记录器继承,例如,您也可以更简单地执行此操作。这里我们为错误添加了一个额外的记录器,记录到stderr。它仅适用于特定记录器。

<configuration>
    <appender name="CONSOLE-stdout" class="ch.qos.logback.core.ConsoleAppender">
        <target>System.out</target>
        <encoder>
            <pattern>%d %-5level [%thread] %logger{0}: %msg%n</pattern>
        </encoder>
    </appender>
    <appender name="CONSOLE-stderr" class="ch.qos.logback.core.ConsoleAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>ERROR</level>
        </filter>

        <target>System.err</target>
        <encoder>
            <pattern>%d %-5level [%thread] %logger{0}: %msg%n</pattern>
        </encoder>
    </appender>
    <root level="DEBUG">
        <appender-ref ref="CONSOLE-stdout" />
    </root>

        <!-- We want error logging from this logger to go to an extra appender 
             It still inherits CONSOLE-stdout from the root logger -->
    <logger name="org.springframework" level="INFO">
        <appender-ref ref="CONSOLE-stderr" />
    </logger>
</configuration>

答案 2 :(得分:3)

添加比此处已经更简单的其他解决方案

这些解决方案都不适合我,因为我没有使用像Spark或Spring这样的框架。所以我做了一些更简单的事情,看起来功能很好。虽然这个解决方案可能对OP不起作用,但对于那些想要不那么笨重的人来说,这可能是有用的。

<property name="pattern" value="%d{yyyy.MMM.dd HH:mm:ss.SSS} [ProgramName] %level - %msg%n" />

<appender name="FILE" class="ch.qos.logback.core.FileAppender">
    <file>/path/to/your/program.log</file>
    <append>true</append>
    <encoder>
        <pattern>${pattern}</pattern>
    </encoder>
</appender>

<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <target>System.out</target>
    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
        <level>INFO</level>
    </filter>
    <encoder>
        <pattern>${pattern}</pattern>
    </encoder>
</appender>

<root level="debug">
    <appender-ref ref="FILE" />
    <appender-ref ref="STDOUT" />
</root>

使用这种配置,我可以保持控制台相当干净,同时将DEBUG语句输出到日志文件。

答案 3 :(得分:2)

刚刚找到了一个使用logback元素的实用解决方案,但效果非常好,基本上你需要有两个appender,一个带有默认配置,另一个带有过滤器(在我的例子中我使用的是控制台):< / p>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>

    <appender name="WARN_FILTER_STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>WARN</level>
        </filter>
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>

    <logger name="org.apache.spark" level="INFO" additivity="false">
        <appender-ref ref="SPARK" /><!-- this line is not necessary, just here to ilustrate the need for the filter -->
        <appender-ref ref="WARN_FILTER_STDOUT" />
    </logger>

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

答案 4 :(得分:0)

对不同的消息使用多个记录器将是这样的:

import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;

import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.LoggerContext; 
import ch.qos.logback.classic.encoder.PatternLayoutEncoder;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.FileAppender;

public class ConfigureLogBack 
{
    public static void programmaticConfiguration()
    {
        Logger camel = getLogger("MyRoute", C:\\Users\\amrut.malaji\\Desktop\\Oracle\\logback\\camel-Log.txt");
        Logger services = getLogger("webservices", "C:\\Users\\amrut.malaji\\Desktop\\Oracle\\logback\\services-log.txt");
    }

    private static Logger getLogger(String string, String file) {
        LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
    PatternLayoutEncoder ple = new PatternLayoutEncoder();

    ple.setPattern("%date %level [%thread] %logger{10} [%file:%line] %msg%n");
    ple.setContext(lc);
    ple.start();
    FileAppender<ILoggingEvent> fileAppender = new FileAppender<ILoggingEvent>();
    fileAppender.setFile(file);
    fileAppender.setEncoder(ple);
    fileAppender.setContext(lc);
    fileAppender.start();

    Logger logger = (Logger) LoggerFactory.getLogger(string);
    logger.addAppender(fileAppender);
    logger.setLevel(Level.INFO);
    logger.setAdditive(false); /* set to true if root should log too */

    return logger;
}

答案 5 :(得分:0)

  

追加器上的阈值过滤器的粒度不够细

您可以使用EvaluatorFilter。 JaninoEventEvaluator将需要对janino(.jar)的引用,而logback.xml示例将是:

<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
        <level>INFO</level>
    </filter>
    <filter class="ch.qos.logback.core.filter.EvaluatorFilter">      
        <evaluator class="ch.qos.logback.classic.boolex.JaninoEventEvaluator">
            <expression>
                level &lt;= ERROR &amp;&amp; logger.equals(&quot;com.myapp.ThresholdLoggerFilter&quot;)
            </expression>
        </evaluator>
        <OnMismatch>DENY</OnMismatch>
        <OnMatch>NEUTRAL</OnMatch>
    </filter>
 </appender>

此方法在expression标记中使用Java表达式(必须转义xml)来评估日志记录事件,并且不需要编写自定义Java类。