Below image shows the important classes in Log4j2 API. Log4j2 Architectureīefore we proceed for Log4j Example tutorial, it’s good to look into Log4j2 architecture. Apache Log4j is the front runner tool for logging in Java applications, so you should use it. Not sufficient you may get lost with flow.Īs you can see above, using of logging mechanism will be more efficient with less maintenance cost. Sufficient for complicated structure and flow Logging mechanism will provide you several benefits that you will not find in normal debugging.Ĭategory / Operation (Debugging, Logging)Ĭan’t be integrated with persistent storageĬan be integrated with persistent storage (Files, Database, NoSQL database, etc.)Ĭan be used for achieving auditing if it’s used efficiently You can debug an application using Eclipse Debugging or some other tools, but that is not sufficient and feasible in a production environment. Log4j is an open source library that’s published and licensed under Apache Software. Using Logging API in application isn’t a luxury, it’s a must have. We will also explore Log4j2 architecture, log4j2 configuration, log4j2 logging levels, appenders, filters and much more. In this Log4j2 Example Tutorial, you will learn how to get started with Apache Log4j2. Apache Log4j 2 is the next version, that is far better than Log4j. Apache Log4j is one of the most widely used logging frameworks. Many frameworks provide some way of default logging, but it’s always best to go with the industry standard logging mechanism. So the only way to figure out what happened in a specific case is to debug through the logs. But when it comes to production, you will always face unique scenarios and exception. Most of the application go through Development testing, unit testing, integration testing. If there is no suitable logging in an application, maintenance will be a nightmare.

If you ask an expert developer about the most annoying thing about an application, the answer might be related to logging. Welcome to the Apache Log4j2 Example Tutorial.

Lansweeper log4j2