You could configure your Log4j listener in the web.xml instead of the spring-context.xml <context-param> <param-name>log4jConfigLocation</param-name> <param-value>/WEB-INF/classes/log4j.web.properties</param-value> </context-param> <listener> <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class> </listener> So it is up before Spring starts.
It’s much easier to do the following: In log4j.xml define variable as ${variable}: <appender name=”FILE” class=”org.apache.log4j.FileAppender”> <param name=”File” value=”${logfilename}.log” /> <layout class=”org.apache.log4j.PatternLayout”> <param name=”ConversionPattern” value=”%d::[%t]::%-5p::%c::%x – %m%n” /> </layout> </appender> Then make sure you set the system property when you start your JVM such as: java -Dlogfilename=my_fancy_filename example.Application That will create a dynamic log file … Read more
You can also do this from the log4j.properties file. Using the sample file below I have added the system property ${logfile.name}: # logfile is set to be a RollingFileAppender log4j.appender.logfile=org.apache.log4j.RollingFileAppender log4j.appender.logfile.File=${logfile.name} log4j.appender.logfile.MaxFileSize=10MB log4j.appender.logfile.layout=org.apache.log4j.PatternLayout log4j.appender.logfile.layout.ConversionPattern=[%-5p]%d{yyyyMMdd@HH\:mm\:ss,SSS}\:%c – %m%n The log file name can then be set two different ways: As a command line, system property passed to … Read more
I believe that the configure method expects an absolute path. Anyhow, you may also try to load a Properties object first: Properties props = new Properties(); props.load(new FileInputStream(“log4j.properties”)); PropertyConfigurator.configure(props); If the properties file is in the jar, then you could do something like this: Properties props = new Properties(); props.load(getClass().getResourceAsStream(“/log4j.properties”)); PropertyConfigurator.configure(props); The above assumes that … Read more
One approach I have used successfully is to use slf4j as my primary logging API. I then have slf4j bind to log4j. 3rd party dependencies using other frameworks (like JUL) can be bridged to slf4j.
h/t rgoers The FileAppender doesn’t support two dollar signs on the file name as the file is opened when the appender is started. What you are indicating with two dollar signs is that you want – potentially – a different file name for each event. With a single $ (as in ${sys:logFilename}), the system will … Read more
You can use MulticolorLayout from jcabi-log. Add this dependency to the project: <dependency> <groupId>com.jcabi</groupId> <artifactId>jcabi-log</artifactId> <version>0.17.1</version> </dependency> And then configure it in log4j.properties: log4j.rootLogger=INFO, CONSOLE log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender log4j.appender.CONSOLE.layout=com.jcabi.log.MulticolorLayout log4j.appender.CONSOLE.layout.ConversionPattern=[%color{%p}] %c: %m%n Same in log4j.xml: <appender name=”CONSOLE” class=”org.apache.log4j.ConsoleAppender”> <param name=”Target” value=”System.out” /> <layout class=”com.jcabi.log.MulticolorLayout”> <param name=”ConversionPattern” value=”[%color{%p}] %m%n” /> </layout> </appender> In this example, %p will be … Read more
You do not need to give the JVM a different property name. The logging code searches for the log4j.properties file using the classpath. So all you need to do is ensure that your test log4j.properties file is in a location that it will find before the release file. I use Maven, which lays out files … Read more
Go ahead: program to the log4j2 API instead of slf4j It’s safe: the Log4j2 API offers the exact same guarantees as slf4j – and more. Now that Log4j2 itself is separated into an API and an implementation module, there is no longer any value in using SLF4J. Yes, it is good engineering practice to keep … Read more
The problem might be that WebSphere 6.1 uses Jakarta Commons Logging (JCL) internally, and if any of your code or 3rd-party libraries also use JCL, WebSphere’s configuration conflicts with your application trying to use log4j. If this is happening, you’ll see exactly what you’re seeing. There are multiple references and blog posts that describe ways … Read more