Spark is a micro framework for creating web applications in Kotlin and Java 8 with minimal effort. It is a simple and expressive Java/Kotlin web framework DSL built for rapid development. Sparks intention is to provide an alternative for Kotlin/Java developers that want to develop their web applications as expressive as possible and with minimal boilerplate. With a clear philosophy Spark is designed not only to make you more productive, but also to make your code better under the influence of Spark’s sleek, declarative and expressive syntax.

Spark - A simple expressive web framework for java

Light 4j is a fast, lightweight and cloud native microservices framework. Light means lightweight, lighting fast and shed light on how to program with modern Java SE. It is 44 times faster than the most popular microservices platform Spring Boot embedded Tomcat and use only 1/5 of memory. <BR><BR>
Its features include: 
<ul>
<li>Plugin architecture for startup/shutdown hooks and middleware components</li>
<li>Distributed OAuth2 JWT security verification as part of the framework</li>
<li>Request and response validation against OpenAPI specification at runtime</li>
<li>Metrics collected in influxdb and viewed from Grafana Dashboard for both services and clients</li>
<li>Global exception handling for runtime exception, api exception and other checked exceptions</li>
<li>Mask sensitive data like credit card, sin number etc. before logging</li>
<li>Sanitize cross site scripting for query parameters, request headers and body</li>
<li>Audit to dump important info or entire request and response.</li>
<li>Body parser to support different content types</li>
<li>Standardized response code and messages from configuration file</li>
<li>Externalized configuration for all modules for dockerized environment</li>
<li>CORS pre-flight handler for SPA (Angular or React) from another domain</li>
<li>Rate limiting for services that exposed outside to the Internet</li>
<li>Service registry and discovery support direct, Consul and Zookeeper</li>
<li>Client side discovery and load balance to eliminate proxies</li>
<li>A client module that is tightly integrated with Light-OAuth2 and supports traceability</li>
</ul>

Light 4j is a fast, lightweight and cloud native microservices framework. Light means lightweight, lighting fast and shed light on how to program with modern Java SE. It is 44 times faster than the most popular microservices platform Spring Boot embedded Tomcat and use only 1/5 of memory.

light-4j - A fast, lightweight and more productive microservices framework

Ratpack is a set of Java libraries for building modern HTTP applications. It provides just enough for writing practical, high performance, apps. It is built on Java 8, Netty and reactive principles. It is similar to NodeJS, helps to implement non blocking HTTP apps in Java.


Ratpack - A toolkit for JVM web applications

Javalin is a very lightweight web framework for Kotlin and Java, inspired by Sparkjava and koa.js. Javalin is written in Kotlin with a few functional interfaces written in Java. This was necessary to provide an enjoyable and near identical experience for both Kotlin and Java developers.
<ul>
  <li>Lightweight - You don’t have to learn any advanced concepts to get started</li>
  <li>Consistent API - All handlers and mappers are void and operate on the Context (ctx)</li>
  <li>Almost identical API for both Kotlin and Java</li>
  <li>Not opinionated - A library rather than a framework (you never have to extend anything)</li>
  <li>Fully customizable embedded server (Jetty)</li>
  <li>JSON-object-mapping (via Jackson)</li>
  <li>Simple per-endpoint auth via <code class="highlighter-rouge">AccessManager</code> interface</li>
  <li>Simple static file handling</li>
  <li>Lifecycle events</li>
  <li>CookieStore - An easy way to serialize and store objects in cookies</li>
  <li>Template rendering (Velocity, Freemarker, Thymeleaf, Mustache)</li>
  <li>Markdown rendering</li>
</ul>

Javalin is a very lightweight web framework for Kotlin and Java, inspired by Sparkjava and koa.js. Javalin is written in Kotlin with a few functional interfaces written in Java. This was necessary to provide an enjoyable and near identical experience for both Kotlin and Java developers.

Javalin - A Simple REST API Library for Java / Kotlin

RESTX is the lightweight, modular, feature rich, blazing fast, open source Java REST framework. It shares similarities with modern frameworks like Play! like hot compile and a very productive experience, but focused on REST and pure Java.
<BR><BR>
It is focused more on Rest. This implies that it’s not a general web framework, i.e., there is no templating mechanism. It’s better use with a JavaScript framework on the client side, and you can always use any other templating mechanism to serve your pages.

RESTX is the lightweight, modular, feature rich, blazing fast, open source Java REST framework. It shares similarities with modern frameworks like Play! like hot compile and a very productive experience, but focused on REST and pure Java.

RESTX - the lightweight Java REST framework

The BeAPI Framework is a full featured api automation framework providing a FULL API automation with an AVERAGE response time per call of 0.27 milliseconds per request (Google requires their calls to be UNDER 200 ms). Its feature include Automated Batching, CORS, JWT Authentication, Throttling & Rate/Data Limits, Localized API Cache, Reporting.

BeAPI Framework - Full featured api automation framework

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Spark - A simple expressive web framework for java

light-4j - A fast, lightweight and more productive microservices framework

Ratpack - A toolkit for JVM web applications

Javalin - A Simple REST API Library for Java / Kotlin

RESTX - the lightweight Java REST framework

BeAPI Framework - Full featured api automation framework

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Spark - A simple expressive web framework for java

light-4j - A fast, lightweight and more productive microservices framework

Ratpack - A toolkit for JVM web applications

Javalin - A Simple REST API Library for Java / Kotlin

RESTX - the lightweight Java REST framework

BeAPI Framework - Full featured api automation framework

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