You can configure Log4J 2 either programmatically in your application or through configuration files, such as properties, XML, JSON, and YAML residing on your project classpath. Similarly, during local development, you can work with the console appender to avoid file I/O overheads and in other deployment environments, set a file appender or some other persistent destination to preserve log messages. For example, it is common to set the logging level to DEBUG during development, and later switch it to ERROR to avoid filling your logs with excessive debug information. Also, you will often need to keep changing Log4J 2 configurations of an application across its deployment lifecycle. As different applications have different logging requirements, you’re able to configure LogJ 2 accordingly. Log4J 2 provides various components, such as loggers, appenders, and layouts that work together to perform logging in an application. This is just one of several ways you can configure Log4J 2. In this post, I will discuss how to configure Log4J 2 using a properties configuration file. If you have not read it, I recommend starting with the introductory post first. I wrote an introductory post on Log4J 2 here. Since the initial release of Log4J 2 on August 2015, it’s quickly being adopted by the developer community. Log4J 2 goes steps ahead by removing the inherent architectural flaws of Log4J 1.x. Log4net is one of the most popular logging frameworks for Microsoft’s. Its predecessor Log4J 1.x has been around for more than one and a half decade and is still one of the most widely used Java logging frameworks. Log4J 2 is a logging framework designed to address the logging requirements of enterprise applications.
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