What is Grails?
Grails is a framework used to build web applications with the Groovy programming language. The core framework is very extensible and there are numerous plugins available that provide easy integration of add-on features.
Flat Learning Curve
Convention-over-configuration, sensible defaults, opinionated APIs, and the Groovy language combine to make Grails easy to learn for Java developers. Spring Boot
On top of Spring Boot
Smooth Java Integration
Apache Groovy is a language for the Java platform designed to enhance developers' productivity. It is an optionally-typed and dynamic language but with static-typing and static compilation capabilities.
Seamless GORM Integration
Grails seamlessly integrates with GORM, a data access toolkit that provides a rich set of APIs for accessing relational and non-relational data. GORM also includes implementations for Hibernate (SQL), MongoDB, Cassandra, and Neo4j.
REST APIs, React, ANGULAR
Developers can build plugins that extend and enhance Grails, or they can access existing plugins published by a vibrant plugin community.
The async features of Grails aim to simplify concurrent programming. Grails' features include the concept of Promises, a unified event model, and the use of RxJava to write reactive logic.
Grails is an Open Source Apache 2 License project.
Grails relies on expressive domain-specific languages (DSLs) for validation, querying, markup rendering, and more.
Developers can access support at any time via IDEs and text editors, such as Intellij IDEA, Eclipse, Sublime, and Textmate.