When comparing Play Framework vs Rocket, the Slant community recommends Play Framework for most people. In the question“What are the best backend web frameworks?” Play Framework is ranked 7th while Rocket is ranked 13th.
Ranked in these QuestionsQuestion Ranking
Pro Asynchronous Core
Pro Interoperable with Java
It's like Java, but more Haskell-y.
Pro Good documentation and a great community
Play has quite a large community which provides numerous tutorials and videos related to developing with Play.
The Play official documentation covers many things, such as the framework itself but also specific stuff such as Akka, SBT and Netty.
There are also many big companies that base their main sites around Play, one of them is LinkedIn which provides third-party documentation on a regular basis.
Pro Play is an extensive ecosystem
Play uses Akka for concurrency, Scala for a templating engine, Netty as a client-server framework and SBT (Simple Build Tool) for building. And they all come out of the box.
Play also comes with the option to scaffold your applications. Play is an all-embracing ecosystem designed to increase developer productivity and shorten development times.
Pro Simple for beginners
Play is very simple to get started. The documentation is very helpful for beginners and advanced users alike and the official website has a great "Getting Started" tutorial to begin developing with Play.
Pro Good Websocket Support
Pro Readable code
Play framework's convention over configuration methodology makes most Play projects have a very similar structure. This means that the code written for the framework is very readable. This enables a developer to switch between applications without having to relearn the ecosystem for every project. The built-in templating system also helps with code and makes it possible to have a very low count of lines of code.
Pro Can use Java, one of the most widely known languages
Java is one of the most widely known languages, so people coming from that background can jump right in and not have to learn a new language syntax.
Pro Easy To Use
Rocket makes extensive use of Rust's code generation tools to provide a clean API
Pro Testing Library
Unit test your applications with ease using the built-in testing library
Pro Query Strings
Handling query strings and parameters is type-safe and easy in Rocket
Pro Config Environments
Configure your application your way for development, staging, and production
Rocket streams all incoming and outgoing data, so size isn't a concern
View, add, or remove cookies, with or without encryption, without hassle
Rocket makes rendering templates a breeze with built-in templating support
Easily create your own primitives that any Rocket application can use
Pro Type Safe
From request to response Rocket ensures that your types mean something
Pro Boilerplate Free
Spend your time writing code that really matters, and let Rocket generate the rest
Con Not as many resources to learn
Other languages and frameworks have countless tutorials, books, moocs, etc. Java and Play does not have nearly as much.
Con Backward incompatibility
The jump from Play 1 to Play 2.x caused a lot of confusion. While it is important to have some kind of evolution, sometimes it causes backward incompatibility which can create some problems. It makes tutorials or modules made for the old version obsolete. This can make it hard for beginners to find useful resources. The template engine which used Groovy now uses Scala.