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详解log4j2(下) - 按日志级别区分文件输出

發布時間：2024/1/23 编程问答 32 豆豆
生活随笔 收集整理的這篇文章主要介紹了 详解log4j2(下) - 按日志级别区分文件输出 小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

1.?按日志級別區分文件輸出

有些人習慣按日志信息級別輸出到不同名稱的文件中，如info.log，error.log，warn.log等，在log4j2中可通過配置Filters來實現。

假定需求是把INFO及以下級別的信息輸出到info.log，WARN和ERROR級別的信息輸出到error.log，FATAL級別輸出到fatal.log，配置文件如下：


  • <Configuration?status="WARN"?monitorInterval="300">??
  • ????<properties>??
  • ????????<property?name="LOG_HOME">D:/logs</property>??
  • ????</properties>??
  • ????<Appenders>??
  • ????????<Console?name="Console"?target="SYSTEM_OUT">??
  • ????????????<PatternLayout?pattern="%d{HH:mm:ss.SSS}?[%t]?%-5level?%logger{36}?-?%msg%n"?/>??
  • ????????</Console>??
  • ??
  • ????????<RollingRandomAccessFile?name="InfoFile"??
  • ????????????fileName="${LOG_HOME}/info.log"??
  • ????????????filePattern="${LOG_HOME}/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">??
  • ????????????<Filters>??
  • ????????????????<ThresholdFilter?level="warn"?onMatch="DENY"?onMismatch="NEUTRAL"?/>??
  • ????????????????<ThresholdFilter?level="trace"?onMatch="ACCEPT"?onMismatch="DENY"?/>??
  • ????????????</Filters>??
  • ????????????<PatternLayout?pattern="%date{yyyy-MM-dd?HH:mm:ss.SSS}?%level?[%thread][%file:%line]?-?%msg%n"?/>??
  • ????????????<Policies>??
  • ????????????????<TimeBasedTriggeringPolicy?/>??
  • ????????????????<SizeBasedTriggeringPolicy?size="10?MB"?/>??
  • ????????????</Policies>??
  • ????????????<DefaultRolloverStrategy?max="20"?/>??
  • ????????</RollingRandomAccessFile>??
  • ??????????
  • ????????<RollingRandomAccessFile?name="ErrorFile"??
  • ????????????fileName="${LOG_HOME}/error.log"??
  • ????????????filePattern="${LOG_HOME}/$${date:yyyy-MM}/error-%d{yyyy-MM-dd}-%i.log">??
  • ????????????<Filters>??
  • ????????????????<ThresholdFilter?level="fatal"?onMatch="DENY"?onMismatch="NEUTRAL"?/>??
  • ????????????????<ThresholdFilter?level="warn"?onMatch="ACCEPT"?onMismatch="DENY"?/>??
  • ????????????</Filters>??
  • ????????????<PatternLayout?pattern="%date{yyyy-MM-dd?HH:mm:ss.SSS}?%level?[%thread][%file:%line]?-?%msg%n"?/>??
  • ????????????<Policies>??
  • ????????????????<TimeBasedTriggeringPolicy?/>??
  • ????????????????<SizeBasedTriggeringPolicy?size="10?MB"?/>??
  • ????????????</Policies>??
  • ????????????<DefaultRolloverStrategy?max="20"?/>??
  • ????????</RollingRandomAccessFile>??
  • ??????????
  • ????????<RollingRandomAccessFile?name="FatalFile"??
  • ????????????fileName="${LOG_HOME}/fatal.log"??
  • ????????????filePattern="${LOG_HOME}/$${date:yyyy-MM}/fatal-%d{yyyy-MM-dd}-%i.log">??
  • ????????????<Filters>??
  • ????????????????<ThresholdFilter?level="fatal"?onMatch="ACCEPT"?onMismatch="DENY"?/>??
  • ????????????</Filters>??
  • ????????????<PatternLayout?pattern="%date{yyyy-MM-dd?HH:mm:ss.SSS}?%level?[%thread][%file:%line]?-?%msg%n"?/>??
  • ????????????<Policies>??
  • ????????????????<TimeBasedTriggeringPolicy?/>??
  • ????????????????<SizeBasedTriggeringPolicy?size="10?MB"?/>??
  • ????????????</Policies>??
  • ????????????<DefaultRolloverStrategy?max="20"?/>??
  • ????????</RollingRandomAccessFile>??
  • ????</Appenders>??
  • ??
  • ????<Loggers>??
  • ????????<Root?level="trace">??
  • ????????????<AppenderRef?ref="Console"?/>??
  • ????????????<AppenderRef?ref="InfoFile"?/>??
  • ????????????<AppenderRef?ref="ErrorFile"?/>??
  • ????????????<AppenderRef?ref="FatalFile"?/>??
  • ????????</Root>??
  • ????</Loggers>??
  • </Configuration>??
    • 測試代碼：
  • public?static?void?main(String[]?args)?{??
  • ????Logger?logger?=?LogManager.getLogger(Client.class);??
  • ????logger.trace("trace?level");??
  • ????logger.debug("debug?level");??
  • ????logger.info("info?level");??
  • ????logger.warn("warn?level");??
  • ????logger.error("error?level");??
  • ????logger.fatal("fatal?level");??
  • }??

    • 2 異步寫日志

    配置文件：
  • <Configuration?status="WARN"?monitorInterval="300">??
  • ????<properties>??
  • ????????<property?name="LOG_HOME">D:/logs</property>??
  • ????????<property?name="FILE_NAME">mylog</property>??
  • ????</properties>??
  • ??
  • ????<Appenders>??
  • ????????<Console?name="Console"?target="SYSTEM_OUT">??
  • ????????????<PatternLayout?pattern="%d{HH:mm:ss.SSS}?[%t]?%-5level?%logger{36}?-?%msg%n"?/>??
  • ????????</Console>??
  • ????????<RollingRandomAccessFile?name="MyFile"??
  • ????????????fileName="${LOG_HOME}/${FILE_NAME}.log"??
  • ????????????filePattern="${LOG_HOME}/$${date:yyyy-MM}/${FILE_NAME}-%d{yyyy-MM-dd?HH-mm}-%i.log">??
  • ????????????<PatternLayout??
  • ????????????????pattern="%date{yyyy-MM-dd?HH:mm:ss.SSS}?%level?[%thread][%file:%line]?-?%msg%n"?/>??
  • ????????????<Policies>??
  • ????????????????<TimeBasedTriggeringPolicy?interval="1"?/>??
  • ????????????????<SizeBasedTriggeringPolicy?size="10?MB"?/>??
  • ????????????</Policies>??
  • ????????????<DefaultRolloverStrategy?max="20"?/>??
  • ????????</RollingRandomAccessFile>??
  • ????????<Async?name="Async">??
  • ????????????<AppenderRef?ref="MyFile"?/>??
  • ????????</Async>??
  • ????</Appenders>??
  • ??
  • ????<Loggers>??
  • ????????<Logger?name="asynclog"?level="trace"?additivity="false"?>??
  • ????????????<AppenderRef?ref="Async"?/>??
  • ????????</Logger>??
  • ????????<Root?level="error">??
  • ????????????<AppenderRef?ref="Console"?/>??
  • ????????</Root>??
  • ????</Loggers>??
  • </Configuration>??
    • 測試代碼：
  • public?static?void?main(String[]?args)?{??
  • ????Logger?logger?=?LogManager.getLogger("asynclog");??
  • ????logger.trace("trace?level");??
  • ????logger.debug("debug?level");??
  • ????logger.info("info?level");??
  • ????logger.warn("warn?level");??
  • ????logger.error("error?level");??
  • ????logger.fatal("fatal?level");??
  • }??

    • 3 輸出到MongoDB

    添加依賴：


  • <dependency>??
  • ????<groupId>org.apache.logging.log4j</groupId>??
  • ????<artifactId>log4j-nosql</artifactId>??
  • ????<version>2.5</version>??
  • </dependency>??
  • <dependency>??
  • ????<groupId>org.mongodb</groupId>??
  • ????<artifactId>mongo-java-driver</artifactId>??
  • ????<version>3.2.2</version>??
  • </dependency>??
    • 配置文件：
  • <Configuration?status="WARN"?monitorInterval="300">??
  • ????<Appenders>??
  • ????????<Console?name="Console"?target="SYSTEM_OUT">??
  • ????????????<PatternLayout?pattern="%d{HH:mm:ss.SSS}?[%t]?%-5level?%logger{36}?-?%msg%n"?/>??
  • ????????</Console>??
  • ??
  • ????????<NoSql?name="databaseAppender">??
  • ????????????<MongoDb?databaseName="test"?collectionName="errorlog"??
  • ????????????????server="localhost"?port="27017"?/>??
  • ????????</NoSql>??
  • ????</Appenders>??
  • ??
  • ????<Loggers>??
  • ????????<Logger?name="mongolog"?level="trace"?additivity="false">??
  • ????????????<AppenderRef?ref="databaseAppender"?/>??
  • ????????</Logger>??
  • ????????<Root?level="error">??
  • ????????????<AppenderRef?ref="Console"?/>??
  • ????????</Root>??
  • ????</Loggers>??
  • </Configuration>??

    • 4 輸出到Flume

    Flume配置(flume-conf.properties)


  • agent1.sources=source1???
  • agent1.sinks=sink1???
  • agent1.channels=channel1???
  • ??
  • agent1.sources.source1.type=avro??
  • agent1.sources.source1.channels=channel1??
  • agent1.sources.source1.bind=0.0.0.0??
  • agent1.sources.source1.port=41414??
  • ??
  • agent1.sinks.sink1.type=file_roll???
  • agent1.sinks.sink1.sink.directory=D:/log??
  • agent1.sinks.sink1.channel=channel1??
  • agent1.sinks.sink1.sink.rollInterval=86400??
  • agent1.sinks.sink1.sink.batchSize=100??
  • agent1.sinks.sink1.sink.serializer=text??
  • agent1.sinks.sink1.sink.serializer.appendNewline?=?false??
  • ??
  • agent1.channels.channel1.type=file???
  • agent1.channels.channel1.checkpointDir=D:/log/checkpoint???
  • agent1.channels.channel1.dataDirs=D:/log/data??
    • 啟動Flume（注：測試環境為windows）

  • flume-ng.cmd?agent?--conf?../conf/?--conf-file?../conf/flume-conf.properties?-name?agent1??
    • 添加依賴：
  • <dependency>??
  • ????<groupId>org.apache.logging.log4j</groupId>??
  • ????<artifactId>log4j-flume-ng</artifactId>??
  • ????<version>2.5</version>??
  • </dependency>??
    • 配置文件：
  • <Configuration?status="WARN"?monitorInterval="300">??
  • ????<Appenders>??
  • ????????<Flume?name="eventLogger"?compress="false">??
  • ????????????<Agent?host="127.0.0.1"?port="41414"?/>??
  • ????????????<RFC5424Layout?enterpriseNumber="18060"?includeMDC="true"?appName="MyApp"?/>??
  • ????????</Flume>??
  • ????</Appenders>??
  • ????<Loggers>??
  • ????????<Root?level="trace">??
  • ????????????<AppenderRef?ref="eventLogger"?/>??
  • ????????</Root>??
  • ????</Loggers>??
  • </Configuration>?

    • 總結

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