log4j

Specify only some packages to have debug output

半城伤御伤魂 提交于 2019-12-05 16:19:18
I want to log some behavior of my web application which also implements hibernate, spring and so on. When I tried to implement log4j logger from apache I had some troubles. When I turn on logger it is also debugging hibernate and spring which I don't want. I tried to configure properties file to the specify the package of my project but it does not work. Here is my code of property file: log4j.rootCategory=ERROR, O log4j.category.com.my.package= DEBUG, FILE, O log4j.appender.FILE=org.apache.log4j.RollingFileAppender log4j.appender.FILE.File=log/logger.log log4j.appender.O=org.apache.log4j

Which log4j facade to choose?

五迷三道 提交于 2019-12-05 16:07:55
Essentially I'm looking for something with the same behavior, configuration, logging levels as log4j, but with some of the missing functionality (e.g. formatted logging — see here and here for related SO threads.) Current nominees are slf4j and log5j . I'm inclined toward SLF4J. allows parameterized logging (formatting) allows consolidation of other frameworks (great for apps using many libraries, each logging to a different framework) log5j is good, but does not have near as much market penetration. since a lot of frameworks already support slf4j you will only have to setup your logging once

how to enable package level logging in log4j

五迷三道 提交于 2019-12-05 15:35:16
问题 Can any one tell me, what is package level logging in log4j ? And how to enable this, today my interview question am unable to answer this :-( Even i didn't find good solution in Google. thank you so much. 回答1: Package level logging is the standard logging of log4j. With log4j configuration, you'd specify the package and the associated level. In the intro example, there is package level logging for "com.foo". # Print only messages of level WARN or above in the package com.foo. log4j.logger

How do I adjust log4j levels at runtime?

北战南征 提交于 2019-12-05 14:50:32
问题 I have a simple web app running on Tomcat 5.5 with log4j for logging. Occasionally I need to push the logging down to DEBUG but most of the time I'm happy with INFO. I can change my config xml and restart the app but I would prefer to switch the log levels on the fly. Is there a standard technique for this? 回答1: Just use the programmatic API: logger.setLevel(Level.DEBUG) in your program when you need more verbose logging output, and logger.setLevel(Level.INFO) to make it less verbose again.

migrating a project from log4j to slf4j+log4j

≡放荡痞女 提交于 2019-12-05 14:46:37
问题 I have a large web project that uses log4j directly, together with many 3rd-party libraries and a mix of logging libraries. our code base - uses log4j directly. Hibernate - uses slf4j, and the slf4j-log4j binding. Spring - uses commons-loggings. Thus, it uses the jcl-over-slf4j bridge api, slf4j itself, and slf4j-log4j binding. Other numerous libraries, using either commons loggings or log4j. I am considering migrating our own code base to slf4j api, but I am not sure if the benefits are

SocketAppender and PatternLayout

一个人想着一个人 提交于 2019-12-05 14:44:23
I have a logger that send log to a log server storage. This work fine but the patternlayout isn't used. With or without that doesn't change anything. I believe remember to read somewhere that socketappender use is own pattern and not others. <appender name="LOGSTASH" class="org.apache.log4j.net.SocketAppender"> <param name="Port" value="5000"/> <param name="RemoteHost" value="192.168.81.131"/> <param name="ReconnectionDelay" value="5000"/> <param name="LocationInfo" value="true" /> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d{ABSOLUTE} %-5p [%c{1}]

How to log repeated warnings only once

偶尔善良 提交于 2019-12-05 14:34:09
问题 There is a pattern that happens every now and then. I have a method called many times, and it contains this snippet: Foo foo = getConfiguredFoo(); if (foo == null) { logger.warn("Foo not configured"); foo = getDefaultFoo(); } Then my log file is cluttered with this warning a hundred times. I know I can grep it out, but I wonder if there is a better way to see this warning only once. Note: the duplication of messages is a correct behavior by default, so this is not about avoiding unintentional

How to include multiple log4j2.xml files in a project?

这一生的挚爱 提交于 2019-12-05 14:15:01
My Project is composed of multiple modules. Each module can run on its own and have a separate log4j2.xml Say Project X is composed of three modules: Module A has log4j2.xml (contains Loggers and Appenders) Module B has log4j2.xml Module C has log4j2.xml While integrating the modules, I have to manually copy-paste the Loggers and Appenders from each module's log4j2.xml into the project specific log4j2.xml file. To avoid copy-paste, I've looked for XInclude to include multiple files but it supports only when Appenders and Loggers are in different file. http://logging.apache.org/log4j/2.x/manual

Appending current time to a new log file each time log4j is initialized

这一生的挚爱 提交于 2019-12-05 14:01:24
Every single time I run my app, I want a new log file to be generated with the time stamp. Something like MyFile-4Nov2010-132122.log . I've seen the use of the DailyRollingFileAppender however I want it to roll each and every time as opposed to just daily. Subclass FileAppender or DailyRollingFileAppender to create a new file when the appender is instantiated. Pratyusha You can also configure the XML config file as below: <appender name="file" class="org.apache.log4j.DailyRollingFileAppender"> <param name="File" value="./logs/message"/> <param name="Append" value="true"/> <!-- Rollover at

how to change log4j log file to utf8

六眼飞鱼酱① 提交于 2019-12-05 13:46:39
问题 I have been handed a code which uses log4j as the logger application. How can I generate a UTF8 logging file for it?. The logfile being created by log4j is in ASCII format at the moment. I have tried the follow Setting the file encoding of the log file by following instructions vi current :set bomb :set fileencoding=utf-8 :wq Infact after doing the above the logfile itself stops working ie no further logs get written to the file for some strange reason I have also tried changing the