For JVM and Android development, Kotlin is the statically typed alternative Java language which exhibits signs of developing it into the big leagues which gets the assistance in development frameworks. Kotlin is now assisted by the Spring Framework for instance and new frameworks such as Javalin and Ktor are assisted by Kotlin.
1. Kotlin frameworks: Spring Framework Assistance :
The most familiar and respected Java framework exhibits dependency injection which assists in the Spring 5.0 version unveiled this year. Kotlin extensions are assisted by Spring 5.0 which offers an alternative to the utility classes and Koltin specific class hierarchies along with additional Koltin features to Spring itself.
In Spring 5.0, a routing domain-specific language called DSL developers use the Spring Functional Web API for accessing Spring’s functional web framework.
For writing annotation-based applications you can use Kotlin for writing for the companion Spring Boot technology which constructs production-ready, standalone Spring applications.
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2. Kotlin frameworks: Support in the Vert.x framework :
Kotlin is assisted by the version 3.5 of the Eclipse Foundation’s Vert.x JVM framework for performing asynchronous events and processing. For the purpose of web development and enterprise, Vert.x is event-driven and nonblocking and therefore applications can manage concurrency with fewer threads and at scale.
3. Kotlin frameworks: Spark Framework for web apps :
Kotlin DSL is added by Spark which is a web framework for Java development which is meant for building Kotlin and Java 8 applications. For Java and Kotlin developers, Spark offers a venue for building costly web apps with small boilerplate code through a declarative syntax.
It is not similar to Apache Spark project for data processing, Spark can be meant for building REST APIs and it also assists template engines. Microservices are developed with Spark for serving JSON in less than ten lines of code.
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4. Kotlin frameworks: Ktor framework for connected apps :
Kotlin developer JetBrains has developed the new Ktor framework for JVM scenarios and it accepts the Kotlin’s strongly typed nature and provides strongly typed endpoints and the ability for exchanging data with classes shared among platforms. A multiplatform application framework is offered by it for the development of connected applications.
Pipeline capabilities of Ktor for HTTP processing requests and APIs use Kotlin coroutines for providing an asynchronous programming model. Lambdas function calls are Ktor APIs.
5. Kotlin frameworks: Javalin REST API library for web apps :
In early November, having just reached its version 1.0 stable and Javalin is considered a lightweight web framework for Java and Kotlin taking inspiration from the Koa and Spark web frameworks. A full framework is not a Javalin but a REST API library. It relies on Kotli along with a few functional interfaces written in Java.
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Model View Controller (MVC) concept in Javalin is not available rather it assists template engines, web sockets, and static file serving. An embedded jetty server is also present as a template and markdown render.