What is Groovy? What is Grails? What kind of applications are built with Groovy on Grails?

What is Groovy on Grails?

It no longer exists under this name. It’s simply called Grails now.

Watching: What is Groovy?

What is Groovy?

Originally, a dynamic language for the JVM. However, as of Groovy 2.0, both static and dynamic typing are supported.

What are Grails?

Grails (formerly known as “Groovy on Grails”) is a programming framework based on Groovy and inspired by Ruby on Rails (there are differences, but also many similarities). Like RoR, Grails promotes “coding by convention,” develops best practices, and is meant to be highly productive.

What kind of apps are built using “Groovy on a Cup”?

Grails is used to build web applications that run on the JVM.

What are the advantages of Groovy over the Grail?

High productivity, focus on business instead of plumbing. (Note that I do not recommend using Grails with an existing data model. The rationale behind this is that Grails promotes a top-down approach where the database ER model arises as a result of Domain classes If you are using Legacy Database you cannot do this method You have to map the database to domain classes and perhaps the naming conventions won’t match, making this work use necessary Hibernate configuration files or annotations.IMO, this is not a trivial change in the workflow, it can get really cumbersome and you will end up losing most of the advantages of Grails.)

Why would one want to use Groovy over Grails when we have standard programming languages ​​like C/C++, Java/J2EE and .NET/C#?

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Because of point 5.


Groovy is an object-oriented programming language for the Java platform. It is a dynamic language with features similar to those of Python, Ruby, Perl, and Smalltalk. It can be used as a scripting language for the Java Platform. Groovy has Java-like syntax and works perfectly with Java bytecode.

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Other features include:

Easy learning curve Supports domain-specific languages ​​Compact syntax Supports dynamic typing Powerful processing primitivesEasy Web application developmentSupports unit testing.

Grails is an open source web application framework using the Groovy programming language. It is intended to be a high productivity framework by following a “code by convention” model, providing an independent development environment and hiding many configuration details from the developer.

Like Rails, Grails seems to be what I call “Grained Grained”. If you do things the Grails way, development is easy (and generally pretty fast). Frameworks tend to have a fancy way of doing most things. On the other hand, if you need to fight the grain of rice, you’ll have a relatively hard time of it.

And don’t say Groovy on Grails (which doesn’t exist), for reasons related to this blog.

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Grails is directly similar to Ruby on Rails, but runs with Groovy. What Groovy ? It’s a scripting language that runs on top of the Java Virtual Machine (JVM).

So you can use the Java libraries you already have or have available (because they are compiled to bytecode and therefore run on the JVM), plus the power of the JVM (for garbage collection, speeding up via JIT compilation etc) and Groovy homogeneity. The learning curve for a Java programmer to pick up Groovy is said to be quite small (thus taking advantage of the large number of Java programmers available).

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It’s a very different way to create web applications following the standard Java mechanisms of servlet programming, JSP, Java Server Faces, etc. Grails (like Ruby on Rails) promises an iterative and more dynamic development environment than standard development mechanisms (whether that’s true in practice, I can’t recommend)

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