log4j

log4j move rolling files to another directory/location

由 懵懂的女人 提交于 2019-12-19 03:39:14
问题 my goal is whenever file mylog.log is rolled to mylog.log.1 this rolled file is also moved to another directory, so in the original directory there is always only mylog.log . Is this possible using RollingFileAppender ? Or another appender from default log4j library? 回答1: I think you mean the RollingFileAppender from Log4J if you use version >= 1.2.16 and the log4j-extras you can use this log4j.rootCategory=INFO, base log4j.appender.base=org.apache.log4j.rolling.RollingFileAppender log4j

logback的使用和logback.xml详解，在Spring项目中使用log打印日志

由 孤街醉人 提交于 2019-12-19 03:21:33
logback的使用和logback.xml详解 一、logback的介绍 　　Logback是由log4j创始人设计的另一个开源日志组件,官方网站： http://logback.qos.ch。它当前分为下面下个模块： 　　logback-core：其它两个模块的基础模块 　　logback-classic：它是log4j的一个改良版本，同时它完整实现了slf4j API使你可以很方便地更换成其它日志系统如log4j或JDK14 Logging 　　logback-access：访问模块与Servlet容器集成提供通过Http来访问日志的功能 二、logback取代log4j的理由 　　1、更快的实现：Logback的内核重写了，在一些关键执行路径上性能提升10倍以上。而且logback不仅性能提升了，初始化内存加载也更小了。 　　2、非常充分的测试：Logback经过了几年，数不清小时的测试。Logback的测试完全不同级别的。 　　3、Logback-classic非常自然实现了SLF4j：Logback-classic实现了SLF4j。在使用SLF4j中，你都感觉不到logback-classic。而且因为logback-classic非常自然地实现了slf4j ， 所 以切换到log4j或者其他，非常容易，只需要提供成另一个jar包就OK

Log4j2 custom plugins - annotation processing with Maven Assembly Plugin

由 纵饮孤独 提交于 2019-12-19 02:08:31
问题 I am not very familiar with Maven, I started using it just yesterday, but I like it. In my project I use Log4j2 library for logging and because of insufficiecy of advanced plugins (like appenders, converters) I need to use custom plugins . log4j-api and log4j-core (also with a bunch of other libraries) are added as dependencies in pom.xml associated with my project. Actually I am using version 2.0 of Log4j. Log4j uses annotation processing to pre-load classes marked as @Plugin . As far as I

How to delete old logs with log4j2

由 断了今生、忘了曾经 提交于 2019-12-18 23:02:43
问题 ( F.Y.I. I already searched out many documents in Internet. I'm using storm-0.10.0-beta1. Configuration file of log4j2 in Storm is worker.xml ) Now, I try to use log4j2. I'm searching out way of deleting old logs but I cannot find out. Part of configuration is like below. <RollingFile name="SERVICE_APPENDER" fileName="${sys:storm.home}/logs/${sys:logfile.name}.service" filePattern="${sys:storm.home}/logs/${sys:logfile.name}.service.%d{yyyyMMdd}"> <PatternLayout> <pattern>${pattern}</pattern>

log4j: How does a Socket Appender work?

由 萝らか妹 提交于 2019-12-18 20:46:39
问题 I'm not sure how Socket Appender works. I know that logging events are sent to particular port. Then we can print logs on a console or put into a file. My question is more about the way logs are sent. Is there e.g. one queue? Is it synchronous or asynchronous? Can using it slow down my program? I've found some info here, but it isn't clear for me. 回答1: From the SocketAppender documentation Logging events are automatically buffered by the native TCP implementation. This means that if the link

log4j: How does a Socket Appender work?

由 早过忘川 提交于 2019-12-18 20:46:33
问题 I'm not sure how Socket Appender works. I know that logging events are sent to particular port. Then we can print logs on a console or put into a file. My question is more about the way logs are sent. Is there e.g. one queue? Is it synchronous or asynchronous? Can using it slow down my program? I've found some info here, but it isn't clear for me. 回答1: From the SocketAppender documentation Logging events are automatically buffered by the native TCP implementation. This means that if the link

Log4j vs Logback: concurrent writing to same log?

由 寵の児 提交于 2019-12-18 18:51:14
问题 I have several web applications running on the same tomcat. I have two questions: 1- By searching, I understood that when multiple applications are present, logging into the same file might make some problems. Is that the case for multiple applications running on the same web server? Is that also correct when default stdout output is used? 2- In Logback library there is a prudent mode: In prudent mode, FileAppender will safely write to the specified file, even in the presence of other

log4j ConversionPattern timestamp with microseconds

由 ☆樱花仙子☆ 提交于 2019-12-18 16:11:36
问题 I want to add microseconds in the timestamp of each entry of my log files generated with log4j, is it possible ? I have searched in the official documentation but there are no mention of unit below the milliseconds. Now i have a conversion pattern like the following : %d{dd/MM/yyyy HH\:mm\:ss,SSS} %-5p [%t] - %m%n in the date conversion pattern( %d ) i want to add microseconds after the milliseconds value( SSS ), is there a way to do it ? 回答1: If you want to display micro-seconds, you need to

How to read log4j output to a web page?

由 人盡茶涼 提交于 2019-12-18 13:34:47
问题 I have a web page, used for admin purposes, which runs a task (image fetching from a remote site). In order to be able to debug the task using the browser only, no ssh etc, I'd like to be able to read all log output from the executing thread and spit it out to the web page. The task boils down to: Changing log level for current thread at the beginning of the call and restore when the call is done. Reading all log output by current thread and storing it in a string. So in pseudocode my execute

Problem with Commons Logging / Log4j setup in spring webapp with tomcat 6

由 牧云@^-^@ 提交于 2019-12-18 12:26:15
问题 I have a problem wih a logging setup in a apring webapp deployed under tomcat 6. The webapp uses the commons-logging api, on runtime log4j should be used. The log file is created but remains empty - no log entries occur. the setup is the following: WEB-INF/web.xml: <context-param> <param-name>log4jConfigLocation</param-name> <param-value>/WEB-INF/log4j.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class> </listener>
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