Log4j2自定義佈局

Question

我正在使用Log4j2和PatterLayout。是否有可能編寫自己的擴展AbstractStringLayout的佈局，以便我可以自定義輸出消息？

我已閱讀文檔，但我只看到佈局的變化 - 沒有自定義的。

https://logging.apache.org/log4j/2.x/manual/layouts.html

Answer 1

是有可能

可以使用自定義AbstractStringLayout或LogEventPatternConverter

EX：AbstractStringLayout

@Plugin(name = "NewCustLayout", category = Node.CATEGORY, elementType = Layout.ELEMENT_TYPE, printObject = true) 
public class NewCustLayout extends AbstractStringLayout 
{ 
    protected NewCustLayout(Charset charset) 
    { 
     super(charset); 
    } 

    @Override public String toSerializable(LogEvent event) 
    { 
     return null; 
    } 
} 

EX：LogEventPatternConverter

@Plugin(name = "NewLayoutConverter", category = "Converter") 
@ConverterKeys({"custLayConv"}) 
public class NewLayoutConverter extends LogEventPatternConverter 
{ 

    /** 
    * Constructs an instance of LoggingEventPatternConverter. 
    * 
    * @param name name of converter. 
    * @param style CSS style for output. 
    */ 
    protected NewLayoutConverter(String name, String style) 
    { 
     super(name, style); 
    } 

    @Override public void format(LogEvent event, StringBuilder toAppendTo) 
    { 

    } 
} 

確保您的配置文件中包含了所有的自定義插件所在的包，

包= 「logging.log4j.custom.plugins」

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> 
<Configuration packages="logging.log4j.custom.plugins" name="SOME NAME"> 
    <Appenders> 
     <Console name="CONSOLE" target="SYSTEM_OUT"> 
      <PatternLayout pattern="%d{MM-dd-yyyy HH:mm:ss,SSS} [%t] %custLayConv %msg%n"/> 
     </Console> 

     <RollingRandomAccessFile name="example" fileName="${sys:tbx.log.path}example.log" filePattern="${sys:tbx.log.path}example.log.%i" append="true" immediateFlush="true" bufferSize="262144"> 
      <NewCustLayout pattern="%d{MM-dd-yyyy HH:mm:ss,SSS} - %msg%n"/> 
      <Policies> 
       <SizeBasedTriggeringPolicy size="100MB"/> 
      </Policies> 
      <DefaultRolloverStrategy fileIndex="max" min="1" max="100" compressionLevel="3"/> 
     </RollingRandomAccessFile> 
     </Appenders> 
    <Loggers> 
     <logger name="logger" level="INFO" additivity="false"> 
      <AppenderRef ref="example" level="INFO"/> 
     </logger> 
     <Root level="INFO"> 
      <AppenderRef ref="CONSOLE" level="INFO"/> 
     </Root> 
    </Loggers> 
</Configuration>