Log4J自定义字段

Question

介绍:

我正在尝试使用log4j获取其他字段,并且它的工作正常但只有当我在代码中而不是在log4j.properties中创建一个appender时

进展:

1. 使用本文为log4j 1.1.3 添加转换字符到PatternLayout
2. 为log4j 1.2制作了一个示例应用程序

问题:

使用属性文件,它将运行但不会使用AppServerPatternLayout,因此不会显示自定义字段.

下载代码

customlog.properties

log4j.rootLogger=FATAL
log4j.logger.some.log=INFO,stdout

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=logging.AppServerPatternLayout
log4j.appender.stdout.layout.ConversionPattern=-----------------using log file------------------------%nTime:      %d%nHost:      %h%nServer:    %s%nComponent: %b%nVersion:   %v%nPriority:  %p%nThread Id: %t%nContext:   %x%nMessage:   %m%n

没有log4j属性文件的Main.java日志记录

AppServerLoggerFactory factory;
factory = new AppServerLoggerFactory("MyServer", "MyComponent", "1.0");
AppServerLogger.setFactory(factory);
Logger logger = AppServerLogger.getLogger("some.log");
PatternLayout layout = new AppServerPatternLayout( formatString );
logger.addAppender( new ConsoleAppender(layout) );
logger.info("Hello");

使用log4j属性文件进行Main.java日志记录

PropertyConfigurator.configure("customlog.properties");
AppServerLoggerFactory factory;
factory = new AppServerLoggerFactory("MyServer", "MyComponent", "1.0");
AppServerLogger.setFactory(factory);
Logger logger = AppServerLogger.getLogger("some.log");
logger.info("Hello");

预期产出

----------------using in code appender----------------------
Time:      2009-11-06 12:55:05,785
Host:      M1330
Server:    MyServer
Component: MyComponent
Version:   1.0
Priority:  INFO
Thread Id: main
Context:   
Message:   logging config from code

实际输出

-----------------using log file------------------------
Time:      2009-11-06 12:56:17,983
Host:      
Server:    
Component: 
Version:   
Priority:  INFO
Thread Id: main
Context:   
Message:   logging config from customlog.properties

解

使用MDC,您可以添加自定义字段

MDC.put("Version", versionName);
Logger log = LogManager.getLogger("some.log");        
log.info("Hello");

并使用UPPER案例X在log4j.properties中将其拉出

log4j.appender.stdout.layout.ConversionPattern=%X{Version}

Answer 1

从您发布的示例中,我只能猜测AppServerPatternLayout不在包中logging.其他一切看起来都像.加

log4j.DEBUG=true

到您的属性文件.然后log4j将在读取属性时转储它所执行的操作.也许这会让你知道什么是错的.

如果这没有帮助,请考虑使用嵌套诊断上下文.