What Scala web-frameworks are available

Question

I ve just started learning Scala  and the first thing I m going to implement is a tiny web application  I ve been using Erlang for the last year to implement server-side software  but I ve never wrote web applications before  It will be a great experience   Are there web-frameworks for Scala except for Lift   Don t get me wrong  Lift looks awesome  I just want to know how many frameworks there are so that I can then choose between them  It s always a good to have a choice  but I the only thing I found was Lift

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Note  Spiffy is outdated    lt plug   Spiffy    is written in Scala uses the fantastic Akka library and actors to scale uses servlet API 3 0 for asynchronous request handling is modular  replacing components is straight forward  uses DSLs to cut down on code where you don t want it supports Scalate and Freemarker for templating   Spiffy is a web framework using Scala  Akka  a Scala actor implementation   and the Java Servlet 3 0 API  It makes use of the the async interface and aims to provide a massively parallel and scalable environment for web applications  Spiffy s various components are all based on the idea that they need to be independent minimalistic modules that do small amounts of work very quickly and hand off the request to the next component in the pipeline  After the last component is done processing the request it signals the servlet container by  completing  the request and sending it back to the client   https   github com mardambey spiffy   lt  plug

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I tend to use JAX-RS using Jersey  you can write nice resource beans in Scala  Java or Groovy  to write RESTul web applications  Then I use Scalate for the rendering the views using one of the various template languages  JADE  Scaml  Ssp  Scala Server Pages   Mustache  etc

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I m very interested in Scala  but I have not used it yet  so with that caveat  the frameworks I am aware of that are not mentioned in HRJ s answer  Lift  Sweet  Slinky  are    Scalatra  previously Step  on GitHub  Play 2  on GitHub  Pinky

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Prikrutil  I think we re on the same boat  I also come to Scala from Erlang  I like Nitrogen a lot so I decided to created a Scala web framework inspired by it   Take a look at Xitrum  Its doc is quite extensive  From README   Xitrum is an async and clustered Scala web framework and web server on top of Netty and Hazelcast    It fills the gap between Scalatra and Lift  more powerful than Scalatra and easier to use than Lift  You can easily create both RESTful APIs and postbacks  Xitrum is controller-first like Scalatra  not view-first like Lift  Annotation is used for URL routes  in the spirit of JAX-RS  You don t have to declare all routes in a single place  Typesafe  in the spirit of Scala  Async  in the spirit of Netty  Sessions can be stored in cookies or clustered Hazelcast  jQuery Validation is integrated for browser side and server side validation  i18n using GNU gettext  which means unlike most other solutions  both singular and plural forms are supported  Conditional GET using ETag    Hazelcast also gives    In-process and clustered cache  you don t need separate cache servers  In-process and clustered Comet  you can scale Comet to multiple web servers    Follow the tutorial for a quick start

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There s also Pinky  which used to be on bitbucket but got transfered to github   By the way  github is a great place to search for Scala projects  as there s a lot being put there

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I have stumbled upon your question a few weeks back  but since then also learned about Circumflex  This is a nice  minimal framework that is therefore easy to learn  and it has pretty good documentation available as well   Beside it s minimal-ness  it also claims to work well with other libraries and lets you use your own implementation of things when you need it

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I d like to add my own efforts to this list   You can find out more information here   brzy framework  It s in early development and I m still working on it aggressively   It includes features like    A focus on simplicity and extensibility  Integrated build tool  Modular design  some initial modules includes support for scalate  email  jms  jpa  squeryl  cassandra  cron services and more  Simple RESTful controllers and actions    Any and all feedback is much appreciated   UPDATE  2011-09-078  I just posted a major update to version 0 9 1   There s more info at http   brzy org which includes a screencast

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One very interesting web framework with commercial deployment is Scalatra  inspired by Ruby s Sinatra  Here s an InfoQ article about it

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Try Play Framework  which also support Scala

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Following is a dump of frameworks  It doesn t mean I actually used them    Coeus  A traditional MVC web framework for Scala  Unfiltered  A toolkit for servicing HTTP requests in Scala  Uniscala Granite   Gardel Mondo Amore  A Scala port of the Ruby web framework Sinatra Scales XML  Flexible approach to XML handling and a simplified way of interacting with XML   Belt  A Rack-like interface for web applications built on top of Scalaz-HTTP  Frank  Web application DSL built on top of Scalaz Belt  MixedBits  A framework for the Scala progamming language to help build web sites Circumflex  Unites several self-contained open source projects for application development using the Scala programming language  Scala Webmachine  Port of Basho s webmachine in Scala  a REST-based system for building web applications  Bowler  A RESTful  multi-channel ready Scala web framework

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Play is pretty sweet   It is now production ready  It incorporates  a cool template framework automatic reloading of source files upon safe  a composable action system  akka awesomeness  etc   Its part of the Typesafe Stack   Having used it for two projects  I can say that it works pretty smoothly and it should be something to consider next time you are looking to learn new web frameworks

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There s a new web framework  called Scala Web Pages  From the site   Target Audience  The Scala Pages web framework is likely to appeal to web programmers who come from a Java background and want to program web applications in Scala  The emphasis is on OOP rather than functional programming   Characteristics And Features   Adheres to model-view-controller paradigm Text-based template engine Simple syntax   variable and  lt  scp-instruction  gt  Encoding content detection  able to handle international text encodings Snippets instead of custom tags URL Rewriting

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It must be noted that there is also a considerable interest in Wicket and Scala  Wicket fits Scala suprisingly well  If you want to take advantage of the very mature Wicket project and its ecosystem  extensions  plus the concise syntax and productivity advantage of Scala  this one may be for you    See also    Some prosa Presentation Some experience with Wicket and Scala Announcments with reference to the project for the glue code to bind Scala closures to models

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I find Unfiltered very interesting https   github com unfiltered unfiltered   It s mentioned in IttayD s list    Here is a presentation about it  http   unfiltered lessis me  0 and the video http   code technically us post 942531598 doug-tangren-presents-the-unfiltered-toolkit-for  Also here there is an article with more info http   code technically us post 998251172 holding-the-parameter

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Both Sweet and Slinky seem to be unmaintanted for about a year  Sweet Maven repo sweetsoftwaredesign com is dead so there s even no way to download dependencies

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I wrote a blog post about this   To summarise  some of the options are    Lift Sweet Slinky   I finally found that none were suitable for me  and developed my own little  framework    It is not open-source yet

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You could also try Context  It was designed to be a Java-framework but I have successfully used it with Scala also without difficulties  It is a component based framework and has similar properties as Lift or Tapestry

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I like Lift  -   Play is my second choice for Scala-friendly web frameworks   Wicket is my third choice

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