# Embedded Servlet Containers in SpringBoot: Jetty, Tomcat, Undertow and more

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    Detailed reference for Embedded Servlet Containers in SpringBoot: Jetty, Tomcat, Undertow and more in the context of Developer Ecosystem.

## Table of Contents

1. [Architectural Foundations](#architectural-foundations)
  - [Kubernetes Tools](#kubernetes-tools)
    - [General Reference](#general-reference)
1. [Platform Engineering](#platform-engineering)
  - [Application Servers](#application-servers)
    - [Migration](#migration)
    - [Web Servers](#web-servers)

## Architectural Foundations

### Kubernetes Tools

#### General Reference

  - [Comparing Embedded Servlet Containers in Spring Boot](https://www.baeldung.com/spring-boot-servlet-containers)  <span class='md-tag md-tag--info'>[COMMUNITY-TOOL]</span> — A curated technical resource and architectural guide covering Comparing Embedded Servlet Containers in Spring Boot in the Kubernetes Tools ecosystem.
  - [Tomcat vs. Jetty vs. Undertow: Comparison of Spring Boot Embedded Servlet' Containers](https://examples.javacodegeeks.com/enterprise-java/spring/tomcat-vs-jetty-vs-undertow-comparison-of-spring-boot-embedded-servlet-containers)  <span class='md-tag md-tag--info'>[COMMUNITY-TOOL]</span> — A curated technical resource and architectural guide covering Tomcat vs. Jetty vs. Undertow: Comparison of Spring Boot Embedded Servlet' Containers in the Kubernetes Tools ecosystem.
## Platform Engineering

### Application Servers

#### Migration

  - **(2021)** [Apache Tomcat migration tool for Jakarta EE](https://github.com/apache/tomcat-jakartaee-migration) <span class='md-tag md-tag--info'>⭐ 188</span> <svg class="v2-sparkline" width="50" height="15" viewBox="0 0 50 15" style="vertical-align: middle; display: inline-block; margin-left: 6px;" title="Activity Trend"><defs><linearGradient id="spark-grad-40c5c6de" x1="0" y1="0" x2="1" y2="0"><stop offset="0%" stop-color="rgba(34, 211, 238, 0.2)" /><stop offset="100%" stop-color="var(--md-accent-fg-color)" /></linearGradient></defs><path class="v2-sparkline-path" d="M 0 13 L 10 9 L 20 5 L 30 2 L 40 9 L 50 11" fill="none" stroke="url(#spark-grad-40c5c6de)" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" /><circle cx="50" cy="11" r="2" fill="var(--md-accent-fg-color)" /></svg> <span class='md-tag md-tag--warning'>[JAVA CONTENT]</span> 🌟🌟 <span class='md-tag md-tag--critical'>[LEGACY]</span> — A command-line utility designed to automatically migrate legacy Java EE 8 web applications to modern Jakarta EE (9+) architectures. It translates package namespaces from `javax.*` to `jakarta.*` in binaries and source code.
#### Web Servers

  - **(2026)** [Undertow](https://undertow.io) <span class='md-tag md-tag--warning'>[JAVA CONTENT]</span> <span class='md-tag md-tag--critical'>[ADVANCED LEVEL]</span>  <span class='md-tag md-tag--info'>[COMMUNITY-TOOL]</span> — A highly performant, modular web server designed by Red Hat. Written in Java, it features non-blocking, asynchronous capabilities, functioning as a powerful, lightweight container engine for high-density microservices.

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