JBoss vs Undertow: What are the differences?

Introduction:

JBoss and Undertow are both web server options that can be used to deploy and run Java applications. While they have some similarities, there are key differences between them that make each suitable for different use cases.

1. Scalability: JBoss is known for its ability to handle large-scale enterprise applications with complex architectures. It provides a full Java EE stack and supports clustering and load balancing, making it ideal for applications that require high scalability and fault tolerance. On the other hand, Undertow is a lightweight web server that focuses on performance and simplicity. It is designed to be embedded within other applications and is well-suited for microservices and lightweight applications that don't require all the features of a full Java EE stack.

2. Configuration: JBoss traditionally uses XML-based configuration files for setting up and managing deployments, making it more flexible and customizable. Undertow, on the other hand, emphasizes a programmatic approach to configuration, allowing developers to define the server behavior using Java code directly. This can provide more control and flexibility but may require more development effort.

3. Performance: Undertow is known for its high performance and low resource usage. It has a non-blocking architecture and can handle a large number of simultaneous connections efficiently. JBoss, being a full-featured Java EE server, may have more overhead due to its extensive set of features and capabilities. However, the performance difference may vary depending on the specific use case and configuration.

4. Community and Support: JBoss has a large and active community, with extensive documentation, forums, and support available. It is backed by Red Hat, a well-established technology company, which provides commercial support and enterprise-grade solutions. Undertow, while also having a community and support, may be comparatively smaller and have fewer resources available.

5. Ease of Use: Undertow is designed to be lightweight and easy to use. It has a simple API and requires minimal configuration, making it a good choice for developers who value simplicity and quick setup. JBoss, being a full Java EE server, may have a steeper learning curve and require more configuration and setup effort.

6. Compatibility: JBoss is fully compatible with the Java EE specifications and supports all the required APIs and components. It provides a complete implementation of the Java EE stack, allowing applications developed using the Java EE standards to run without modification. Undertow, while not a full Java EE server, still supports many of the Java EE APIs and components, but there may be some limitations and differences in behavior.

In summary, JBoss is a robust and scalable server suitable for enterprise applications, while Undertow is a lightweight and high-performance option for microservices and simpler applications. The choice between the two depends on the specific requirements and priorities of the project.