XitrumScala 的 Web 框架

xitrum 是一个 Scala 的 Web 框架，基于 Netty 开发。结构如下图所示：

+-----------------+
|    Your app     |
+-----------------+
|      Xitrum     |  <-- Hazelcast --> Other instances
| +-------------+ |
| | Action/View | |
| +-------------+ |
+-----------------+
|      Netty      |
| +-------------+ |
| | HTTP Server | |
| +-------------+ |
+-----------------+

主要特性：

• 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.
• Typesafe, in the spirit of Scala.
• Asynchronous, in the spirit of Netty.
• Stateless, by default sessions are not stored on server.
• In-process and distribued cache using Hazelcast, you don't need separate cache servers.
• Scalable Comet, you can scale Comet to multiple servers.