slf4j | 易学教程

Configure logging for Jetty's maven plugin?

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问题 I'm invoking the "jetty:run" goal with the following plugin configuration: <plugin> <groupId>org.mortbay.jetty</groupId> <artifactId>jetty-maven-plugin</artifactId> <version>7.4.4.v20110707</version> <configuration> <scanIntervalSeconds>5</scanIntervalSeconds> <connectors> <connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector"> <port>80</port> </connector> </connectors> </configuration> </plugin> Jetty refuses to log anything to slf4j in spite of the fact that my

dubbo开发

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 解压后，放在tomcat/webapp/目录下直接运行。这里tomcat是9090端口，访问http://127.0.0.1:9090/dubbo-admin-2.5.6/，会出现身份验证登录窗口。在WEB-INF目录下，查看dubbo.properties文件，可看到用户名密码配置以及zookeeper注册地址信息 dubbo.registry.address=zookeeper://127.0.0.1:2181 dubbo.admin.root.password=root dubbo.admin.guest.password=guest 使用root/root登陆。 ------------------------------------ dubbo-provider 1. pom.xml <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.6</version> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version

Using java annotation to inject logger dependency

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问题 I am using spring with aspect-j annotation support to allow for an @Loggable annotation. This allows automatic logging on a class based on the configuration. I am wondering if I can somehow use this annotation to expose an slf4j Logger variable into the class for direct use, so that I don't have to do something to the effect of: Logger logger = LoggerFactory.getLogger(MyClass.class); It would be nice if the above was implicitly available due to the annotation and I could just go about doing

ClassCastException: org.slf4j.impl.Log4jLoggerAdapter cannot be cast to ch.qos.logback.classic.Logger

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问题 I was following this answer in order to add a appender on runtime. Even though that works for the original poster, I get this exception in line Logger logger = (Logger) LoggerFactory.getLogger("abc.xyz"); : java.lang.ClassCastException: org.slf4j.impl.Log4jLoggerAdapter cannot be cast to ch.qos.logback.classic.Logger de.mypackage.controller.MyController.meinOeOrte(MyController.java:335) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke

How to dynamically change log level in SLF4j OR Log4J

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问题 Recently I encountered a situtation where Application Loglevel changes dynamically. Application Admin can set it to INFO/DEBUG/ WARN from front end. Based on the log level choosen be him application logging must be changed. I am sure loggers support this scenario, but not sure how can I achive this. If any of you have idea/thoughts on this please let me know. Thanks in advance for your help. -Narendra 回答1: Consider Logback http://logback.qos.ch/ - "a successor to the popular log4j project,

logback with EJB3.1

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问题 I am using logback/slf4j to handle logging in my application. Everything was working perfectly until I started using EJBs. Once I added a stateless EJB to my app, the logger started ignoring my logback.xml and stopped using my appenders. I switched to a programmatic logger configuration to see what was wrong and now I am getting the following error when I try to use my logger within the EJB: org.slf4j.impl.JDK14LoggerFactory cannot be cast to ch.qos.logback.classic.LoggerContext stemming from

SLF4J NoSuchMethodError on LocationAwareLogger

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问题 This is a question that has been asked before, but unfortunately no solution seems to work for me. I am facing this exception (with abridged stack trace): java.lang.NoSuchMethodError: org.slf4j.spi.LocationAwareLogger.log(Lorg/slf4j/Marker;Ljava/lang/String;ILjava/lang/String;[Ljava/lang/Object;Ljava/lang/Throwable;)V at org.apache.commons.logging.impl.SLF4JLocationAwareLog.debug(SLF4JLocationAwareLog.java:133) at org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager$1.getConnection

Configuring Log4j Loggers Programmatically

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问题 I am trying to use SLF4J (with log4j binding) for the first time. I would like to configure 3 different named Loggers that can be returned by a LoggerFactory which will log different levels and push the messages to different appenders: Logger 1 "FileLogger" logs DEBUG and appends to DailyRollingFileAppender Logger 2 "TracingLogger" logs TRACE+ and appends to a JmsAppender Logger 3 "ErrorLogger" logs ERROR+ and appends to a different JmsAppender Furthermore I want them configured

Configuring Log4j Loggers Programmatically

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springBoot中生成日志文件

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1.常见的日志框架：JUL、JCL、Jboss-logging、logback、log4j、log4j2、slf4j 2.由于日志框架太多，在项目中需要集成不同的框架因此slf4j使用了门面设计模式，使其他日志文件都去集成slf4j 3.slf4j的使用以后开发的时候，日志记录方法的调用，不应该来直接调用日志的实现类，而是调用日志抽象层里面的方法；给系统里面导入slf4j的jar和 logback的实现jar 每一个日志的实现框架都有自己的配置文件。使用slf4j以后，配置文件还是做成日志实现框架自己本身的配置文件；如何让系统中所有的日志都统一到slf4j； 1、将系统中其他日志框架先排除出去； 2、用中间包来替换原有的日志框架； 3、我们导入slf4j其他的实现当项目是使用多种日志API时，可以统一适配到SLF4J，中间使用SLF4J或者第三方提供的日志适配器适配到SLF4J，SLF4J再底层用开发者想用的一个日志框架来进行日志系统的实现，从而达到了多种日志的统一实现。其中的技术实现大体有一下两种方式：重写上游类的实现。比如jcl-over-slf4j和log4j-over-slf4j，为了承接log4j 1，重写了log4j 1 的Logger和LogFactory类。对接上游类的扩展方案。比如jul-to-slf4j和log4j-to-slf4j，为了承接J.U.L