appender

问题 I use RollingFileAppender of log4j 1.2.16 , which rolls log files, when they reach a certain size. Now I would like to roll log files daily and when they reach a certain size. Thus there will be one or more log files per day. For example, myapp.log myapp-17.12.2013.log myapp-16.12.2012.log myapp-16.12.2012.1.log myapp-16.12.2012.2.log Is there an off-the-shelf appender, which does it already? 回答1: There are indeed two options: use LogBack with its size and time triggering policy: http:/

问题 I use RollingFileAppender of log4j 1.2.16 , which rolls log files, when they reach a certain size. Now I would like to roll log files daily and when they reach a certain size. Thus there will be one or more log files per day. For example, myapp.log myapp-17.12.2013.log myapp-16.12.2012.log myapp-16.12.2012.1.log myapp-16.12.2012.2.log Is there an off-the-shelf appender, which does it already? 回答1: There are indeed two options: use LogBack with its size and time triggering policy: http:/

问题 I'd like a very simple XML configuration file with a console and a file appender using log4j2. (The Apache Website is killing me with much Information.) 回答1: <?xml version="1.0" encoding="UTF-8"?> <Configuration status="INFO"> <Appenders> <Console name="Console" target="SYSTEM_OUT"> <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" /> </Console> <File name="MyFile" fileName="all.log" immediateFlush="false" append="false"> <PatternLayout pattern="%d{yyy-MM-dd HH:mm

问题 I have a package "com.example". This package has five classes. I want to log four of these classes to a file, but exclude the fifth class. I could write four loggers, e.g. logger name="com.example.Class1", and add the same appender to all four loggers. Is there no easier way (let us think that I have 100 instead of 5 classes)? There are some other questions like this one. But the other guys just wanted to exclude a class to log this class. This can be solved using the addivity flag. But I

问题 I would like to configure logback to do the following. Log to a file Roll the file when it reaches 50MB Only keep 7 days worth of logs On startup always generate a new file (do a roll) I have it all working except for the last item, startup roll. Does anyone know how to achieve that? Here's the config... <appender name="File" class="ch.qos.logback.core.rolling.RollingFileAppender"> <layout class="ch.qos.logback.classic.PatternLayout"> <Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} -

问题 How do you configure log4j.properties to have exactly one logfile per run of an app. I've read that you should use a timestamp in the filename but that will create many files per run as time goes by. I tried DailyRollingFileAppender and RollingFileAppender but can't find a way to configure exctly one log per run. The log should not be broken into multiple logs and it shouldn't be truncated and files of old runs should be preserved. Each class has a static org.slf4j.Logger for it's own class

问题 Since in log4j javadoc is WARNING: This version of JDBCAppender is very likely to be completely replaced in the future. Moreoever, it does not log exceptions. What should I do to log to a database? 回答1: If you are looking for a database appender which not only works, but also supports connection pooling, is maintained and properly documented, than consider logback's DBAppender. Ironically enough, the warning in the javadocs about removing JDBCAppender in future versions of log4j was written

问题 Is there any Logger on CPAN which allows me to bundle logs from several programs into one file with synchronising parallel logging when two programs run the same time and call log4Perl in parallel. Background is that I use a custom appender which writes Emails and I would like to bundle all emails in a single file as a backup in case the mail server has problems. 回答1: You can do that in two main ways: with Log::Log4perl::Appender::File (and its descendants) with the 'syswrite' option, which

问题 Forget for a second the question of why on earth would you do such a thing - if, for whatever reason, two FileAppenders are configured with the same file - will this setup work? 回答1: Log4j's FileAppender does not allow for two JVM's writing to the same file. If you try, you'll get a corrupt log file. However, logback, log4j's successor, in prudent mode allows two appenders even in different JVMs to write to the same file. 回答2: It doesn't directly answer your question, but log4*net*'s

问题 I might be asking something trivial, but what I've tried doesn't seem to work. With my "MAIN" appender, I want to log all "info"s everywhere, except in a third-party package (let's call it boring ), which produces too many of them (so I look at warnings only). Additionally, I want to log "debug"s in my interesting package. This works fine with the following logback.groovy : root(INFO, ["MAIN"]) logger("interesting", DEBUG, ["MAIN"]) logger("boring", WARN, ["MAIN"]) Now I want to configure a