Log4j2：如何在 Yaml 配置中配置多个相同类型的 Appender

Question

我正在尝试在同一个 YAML 配置中使用 2 个 RollingRandomAccessFile。我可以在 XML 中完成，但不能在 YAML 中完成。结果，我想要两个文件 "application.log" 和 "payload.log".

这是我的工作 XML 配置：

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="debug">
    <Appenders>

        <Console name="CONSOLE" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
        </Console>

        <RollingRandomAccessFile name="PAYLOAD" fileName="logs/payload.log"
                                 filePattern="logs/$${date:yyyy-MM}/payload-%d{MM-dd-yyyy}-%i.log.gz">
            <PatternLayout>
                <pattern>[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n</pattern>
            </PatternLayout>
            <Policies>
                <SizeBasedTriggeringPolicy size="1 KB"/>
            </Policies>
        </RollingRandomAccessFile>

        <RollingRandomAccessFile name="APPLICATION" fileName="logs/application.log"
                                 filePattern="logs/$${date:yyyy-MM}/application-%d{MM-dd-yyyy}-%i.log.gz">
            <PatternLayout>
                <pattern>[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n</pattern>
            </PatternLayout>
            <Policies>
                <SizeBasedTriggeringPolicy size="1 KB"/>
            </Policies>
        </RollingRandomAccessFile>

    </Appenders>

    <Loggers>
        <Root level="info" additivity="false">
            <appender-ref ref="CONSOLE" level="trace"/>
            <appender-ref ref="APPLICATION" level="trace"/>
            <appender-ref ref="PAYLOAD" level="trace"/>
        </Root>
    </Loggers>

</Configuration>

这是我的非工作 YAML 配置。 RollingRandomAccessFile 的第二个声明覆盖了第一个，结果只有 "application.log" :

Configuration:
  status: debug

  Appenders:
    Console:
      name: CONSOLE
      target: SYSTEM_OUT
      PatternLayout:
        Pattern: "%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"
    RollingRandomAccessFile:
      name: PAYLOAD
      fileName: logs/payload.log
      filePattern: "logs/$${date:yyyy-MM}/payload-%d{MM-dd-yyyy}-%i.log.gz"
      PatternLayout:
        Pattern: "%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"
      Policies:
        SizeBasedTriggeringPolicy:
          size: 1 KB
    RollingRandomAccessFile:
      name: APPLICATION
      fileName: logs/application.log
      filePattern: "logs/$${date:yyyy-MM}/application-%d{MM-dd-yyyy}-%i.log.gz"
      PatternLayout:
        Pattern: "%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"
      Policies:
        SizeBasedTriggeringPolicy:
          size: 1 KB

  Loggers:
    Root:
      level: debug
      AppenderRef:
        - ref: CONSOLE
        - ref: PAYLOAD
        - ref: APPLICATION

这是我在 Appender 级别使用 List 尝试的结果，没有输出，甚至控制台也没有输出：

Configuration:
  status: debug

  Appenders:
    - Console:
      name: CONSOLE
      target: SYSTEM_OUT
      PatternLayout:
        Pattern: "%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"
    - RollingRandomAccessFile:
      name: PAYLOAD
      fileName: logs/payload.log
      filePattern: "logs/$${date:yyyy-MM}/payload-%d{MM-dd-yyyy}-%i.log.gz"
      PatternLayout:
        Pattern: "%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"
      Policies:
        SizeBasedTriggeringPolicy:
          size: 1 KB
    - RollingRandomAccessFile:
      name: APPLICATION
      fileName: logs/application.log
      filePattern: "logs/$${date:yyyy-MM}/application-%d{MM-dd-yyyy}-%i.log.gz"
      PatternLayout:
        Pattern: "%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"
      Policies:
        SizeBasedTriggeringPolicy:
          size: 1 KB

  Loggers:
    Root:
      level: debug
      AppenderRef:
        - ref: CONSOLE
        - ref: PAYLOAD
        - ref: APPLICATION

如果我用 RollingFile 替换第二个 RollingRandomAccessFile，它会完美运行。

Answer 1

我终于找到了解决办法，滥用了列表

Configuration:
  status: debug

  Appenders:
    Console:
      name: CONSOLE
      target: SYSTEM_OUT
      PatternLayout:
        Pattern: "%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"
    RollingRandomAccessFile:
      - name: PAYLOAD
        fileName: logs/payload.log
        filePattern: "logs/$${date:yyyy-MM}/payload-%d{MM-dd-yyyy}-%i.log.gz"
        PatternLayout:
          Pattern: "%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"
        Policies:
          SizeBasedTriggeringPolicy:
            size: 1 KB
      - name: APPLICATION
        fileName: logs/application.log
        filePattern: "logs/$${date:yyyy-MM}/application-%d{MM-dd-yyyy}-%i.log.gz"
        PatternLayout:
          Pattern: "%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"
        Policies:
          SizeBasedTriggeringPolicy:
            size: 1 KB

  Loggers:
    Root:
      level: debug
      AppenderRef:
        - ref: CONSOLE
        - ref: PAYLOAD
        - ref: APPLICATION

Answer 2

我必须为每个记录器设置不同的阈值级别，这就是它的样子：

---
Configuration:
  status: info
  name: My Application Logger
  thresholdFilter:
    level: debug
  appenders:
    Console:
      name: STDOUT
      PatternLayout:
        Pattern: "%d %p %c{1.} [%t] %m%n"
    RollingRandomAccessFile:
      name: RollingRandomAccessFile
      fileName: logs/app.log
      filePattern: logs/archive/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz
      PatternLayout:
        Pattern: "%d %p %c{1.} [%t] %m%n"
      Policies:
        SizeBasedTriggeringPolicy:
          size: 20 MB
  Loggers:
    logger:
      - name: org.apache.logging.log4j.test2
        level: debug
        additivity: false
        AppenderRef:
          - ref: RollingRandomAccessFile
    Root:
      level: debug
      AppenderRef:
        - ref: RollingRandomAccessFile
          level: warn
        - ref: STDOUT
...

默认日志级别变为配置给 Root Logger 的级别。如果要覆盖级别，请将级别添加到每个 AppenderRef.

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