是否可以在允许所有其他消息的同时仅抑制Log4j2中的警告消息

问题描述

我正在使用log4j2在控制台和文件中记录消息.我收到了很多我不想要的警告消息.我只想查看Debug和其他消息.是否可以在允许调试"，错误"和任何其他类型的消息的同时抑制警告"消息?

I am using log4j2 to log messages in console and in a file. I am getting a lot of Warn message which I do not want. I only want to see Debug and other messages. is it possible to suppress Warn messages while allowing Debug, Error and any other types of messages?

我在这里已经查看了有关堆栈溢出的其他答案，但是它们仅说明了抑制功能，该抑制作用会将所有低于该特定消息级别的消息抑制掉.例如，如果我将日志级别更改为错误"，则将自动禁止警告调试"和低于此级别的任何其他消息.我不想要这种行为.我想抑制仅警告"消息，同时允许任何可能低于或高于此级别的消息.以下是我的Log2j2配置文件.

I have looked at other answers here on stack overflow but they only tell about the suppression that suppresses all of the messages below that specific message level. For example, if I change my log level to Error I will automatically suppress Warn Debug and any other messages that are below this level. I do not want this behavior. I want to suppress Only Warn messages while allowing any messages below and above this level if it is possible. Below is my Log2j2 Config file.

<Configuration status="error">
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="[%d{DEFAULT}][%5p][%t][%c{1}] - %m%n" />
        </Console>
        <File name="MyFile" fileName="logs/java.log" immediateFlush="false" append="true">
            <PatternLayout pattern="[%d{DEFAULT}][%5p][%t][%c{1}] - %m%n"/>
        </File>
    </Appenders>
    <Loggers>
        <Root level="debug">
            <AppenderRef ref="Console" />
            <AppenderRef ref="MyFile"/>
        </Root>
    </Loggers>
</Configuration>

推荐答案

您可以使用 LevelRangeFilter 拒绝日志事件.

You can use the LevelRangeFilter to reject the log events.

这是一个生成一些日志的简单类:

Here's a simple class that generates some logs:

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class SomeClass {

    private static final Logger log = LogManager.getLogger();   

    public static void main(String[] args){

        if(log.isDebugEnabled())
            log.debug("This is some debug!");
        log.info("Here's some info!");
        log.warn("Warning will be rejected.");
        log.error("Some error happened!");
    }
}

这是一个仅将所有事件发送到控制台的基本配置:

Here's a basic configuration that just sends all events to console:

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
        </Console>
    </Appenders>

    <Loggers>
        <Root level="ALL">
            <AppenderRef ref="Console" />
        </Root>
    </Loggers>
</Configuration>

上面生成的输出是:

21:08:42.215 [main] DEBUG example.SomeClass - This is some debug!
21:08:42.217 [main] INFO  example.SomeClass - Here's some info!
21:08:42.217 [main] WARN  example.SomeClass - Warning will be rejected.
21:08:42.217 [main] ERROR example.SomeClass - Some error happened!

现在，我们将LevelRangeFilter添加到控制台附加程序:

Now we add the LevelRangeFilter to the Console appender:

    <Console name="Console" target="SYSTEM_OUT">
        <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
        <LevelRangeFilter minLevel="WARN" maxLevel="WARN" onMatch="DENY" onMismatch="NEUTRAL"/>
    </Console>

现在的输出是:

21:15:26.987 [main] DEBUG example.SomeClass - This is some debug!
21:15:26.989 [main] INFO  example.SomeClass - Here's some info!
21:15:26.989 [main] ERROR example.SomeClass - Some error happened!

如您所见，WARN消息未记录到控制台.

As you can see the WARN message is not logged to console.

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