Log4j Tutorial: Configuration Example for Logging in Java
Summary
The code of your Java application will be interacting with a standard set of key elements that allow log event creation and manipulation. One side note – the getLogger method can be also called with a String as an argument, for example: It would mean that we want to create a logger and associate the name of com.sematext.blog with it. We can do it programmatically – for example by including a static initialization block: The above code configures Log4j to output the logs to the console in the default format. After running the code with the above configuration the console would print the following content: In the /var/log/sematext/awesome.log file we would see: The nice thing about Appenders is that they can have their level which should be taken into consideration when logging. Just for reference, the log4j.properties file that we used in this example looks as follows: The second type of contextual information that we can include in our log events is mapped diagnostic context.
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