How to Change the Server from the Embedded Server in Spring Boot

Learn how to switch from the default embedded server in Spring Boot to Jetty or Undertow with this easy-to-follow guide.
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How to Change the Server from the Embedded Server in Spring Boot

As a beginner in Spring Boot, you might find yourself wanting to adapt your application environment to better suit your needs or preferences. One common question is how to switch from the default embedded server, which is typically Tomcat, to an alternative like Jetty or Undertow. This guide will guide you through this process effectively.

Understanding the Default Server in Spring Boot

Spring Boot comes with an embedded server that simplifies the development and deployment of applications. By default, this server is based on Tomcat, which is a widely used web server and servlet container. However, there are other servers available that may offer specific advantages depending on your application's requirements. For example:

Jetty: Known for its lightweight, high-performance design, making it suitable for both large and small applications.

Undertow: An ultra-lightweight web server that can handle high concurrency and is highly configurable.

Switching to Jetty in Spring Boot

If you decide to switch to Jetty, the process is quite simple. Follow these steps:

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Step 2: Exclude the Tomcat Dependency

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For Gradle, you can exclude Tomcat this way:

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Step 3: Build Your Project

After making those adjustments, rebuild your project to incorporate Jetty as the embedded server. You can now run your Spring Boot application, and it will utilize Jetty instead of Tomcat.

Alternatively, Opting for Undertow

If you prefer to use Undertow, the process is very similar:

Step 1: Add Undertow Starter Dependency

For Maven:

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

For Gradle:

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Step 2: Exclude Tomcat (if necessary)

As with Jetty, you will want to exclude Tomcat to avoid any potential conflicts using the methods described above.

Step 3: Build Your Project

Finally, after saving your changes, rebuild your project to start using Undertow.

Conclusion

Switching the embedded server in Spring Boot is a straightforward process that can greatly enhance your application's performance and adaptability. Whether you choose Jetty or Undertow, simply updating your dependencies and excluding the default Tomcat server will allow you to customize your environment to fit your specific needs.

With this guide, you should now feel confident in transitioning your project away from the embedded server. Happy coding!