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This is a prototype for the next-generation TorqueBox. We're assigning the codename 'TorqBox' to this effort because we need some way to differentiate it from TorqueBox itself until this prototype matures enough to replace TorqueBox.

Why 'TorqBox'? Mainly because we wanted a new Ruby gem name to release under that's not 'torquebox' and it's close enough to TorqueBox that the connection is obvious. Plus, search engines should still redirect users to the right place for help. Once TorqBox graduates out of a prototype, we'll remove the codename and release it under the regular 'torquebox' gem.

Running TorqBox


TorqBox requires JRuby 1.7.x running in Ruby 1.9 or 2.0 mode. The code has only been tested on JRuby 1.7.6 and higher but should work on earlier versions.

Running directly

From inside your Rack application's root directory:

gem install torqbox


Ensure torqbox is in your Gemfile, then:

rails s torqbox


rackup -s torqbox


We want a smaller, more modular TorqueBox that is easier to get started with, embeddable, and lets users bring in additional functionality as-needed. More details of our motivation and community feedback are expressed in an email thread from the torquebox-user mailing list.


TorqBox runs on JRuby and sits on top of a new lightweight, pluggable, polyglot server codenamed WunderBoss (at least for now). All the new features of TorqBox will be implemented in WunderBoss then exposed via a Ruby API in the TorqBox project. This lets other projects, in other languages, reuse the same functionality by creating small language-specific API wrappers.

The web portion of WunderBoss uses JBoss Undertow, which is also the same web server used in WildFly (the successor to JBoss Application Server).

We aim to reuse the same underlying components as WildFly where it makes sense, and bring our own where it doesn't. Eventually, we hope that TorqBox can run on top of WildFly in addition to running without it, to give users an option between a full-blown Java application server and a very lightweight, minimal server. The lightweight, minimal server is what we'll focus on at first, since TorqueBox already provides the full application server experience.

Current Status

Right now torqbox just provides a basic, high-performance Rack implementation. It should outperform anything else out there, but if you find any cases where this is not true please let us know. It is substantially faster than TorqueBox 3, which is already one of the fastest servers. We'll work on publishing benchmarks as time permits, and we encourage community users to do their own performance tests.


We're developing TorqBox while also maintaining TorqueBox, and we expect it to take some time before the TorqBox prototype becomes mature enough to be called a new major version of TorqueBox.

Our first goal is for TorqBox to become the best JRuby web server option. To us this means high performance, support for newer web technologies (WebSockets, Server Sent Events, SPDY, etc), lightweight, and simple to use. It may mean something else to you, and if it does please let us know. The basic Rack spec is implemented right now, with the rack.hijack API coming soon.

What features from TorqueBox (or elsewhere) we tackle after web is up to you. It could be messaging, caching, scheduled jobs, daemons, or something completely different. Please let us know what you'd like to see.

Long-term we do expect TorqBox to run on top of WildFly for users that still want the full Java application server (or are trying to sneak Ruby into a Java shop). But this will just be an option, not the default.

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