How to Set the Logger Level in Vert.x for Your Java Class and Output to System.out

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Setting Logger Level in Vert.x for Your Java Class

When developing applications using Vert.x, logging becomes a crucial component for tracking application behavior and debugging issues. For developers who want to control logging behavior specifically for their classes, such as defining different logging levels and changing output destinations, this guide will guide you on how to do just that using Vert.x's logging framework and the general best practices as of late 2023.

Understanding the Problem

This is particularly important for situations where you want to keep logs related to a specific functionality while reducing noise from other components. In our example, the structure highlights a class MyClass that uses Vert.x's logging API, but it's essential to note that the Vert.x logging API itself is not ideal for new applications.

The Solution: Moving Away from Vert.x Logging API

1. Understanding Vert.x Logging

The logging API provided by Vert.x is deprecated, which means that while it may still function, it is not recommended for new applications. Instead, Vert.x logging serves as a facade to existing logging tools like:

JDK logging

Log4j

Log4j2

SLF4J

2. Choosing a Logging Framework

To effectively manage logging, here's what you need to do:

Select a Logging Framework: Choose one of the above logging frameworks that suits your application's needs.

Integrate Directly: Instead of relying on the Vert.x facade, integrate the chosen logging framework directly into your Java classes.

3. Example Using SLF4J and Logback

For instance, if we were to use SLF4J with Logback as the logging backend, here is how you'd modify your MyClass:

[[See Video to Reveal this Text or Code Snippet]]

[[See Video to Reveal this Text or Code Snippet]]

In this setup:

Set the root logging level to TRACE to capture all log levels.

Ensure the output is sent to the console by referencing the STDOUT appender.

Conclusion

By shifting from the deprecated Vert.x logging API to a more reliable logging framework like SLF4J with Logback, you not only enhance your application's performance, but you also streamline the logging experience. This makes it much easier to troubleshoot and maintain your application in the long run.

Now, take the time to adjust your project setup based on the insights shared here, and you’ll be well on your way to implementing efficient logging practices in your Java applications using Vert.x.