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Scala is a general purpose programming language designed to express common programming patterns in a concise, elegant, and type-safe way. It integrates very well with the Java platform. Our Scala DSL implementation is built on top of the existing Java-based DSL, but it adds Scala syntax sugar to make building routes even more convenient.

Getting started

Just like the Java DSL, the Scala DSL has a RouteBuilder (org.apache.camel.scala.dsl.RouteBuilder) class that you have to extend to implement your own routes. This example shows you two very simple routes.

{snippet:id=basic|lang=java|url=activemq/camel/trunk/components/camel-scala/src/test/scala/org/apache/camel/scala/dsl/BasicRouteBuilderTest.scala}

If you compare this to the Java DSL, you notice:

Documentation

• Scala DSL - Getting Started gives you basic information on how to use the Scala DSL.
• Scala DSL - EIP shows you the Scala DSL syntax for every EIP supported
• there is no configure() method to override
• a route starts directly with a URI instead of from(uri)
• → is just an alias for to

References

• At ApacheCon Europe 2008 there was a Fast Feather talk that introduced some of the basic Scala language concepts that are being used for building the Scala DSL. Here are the presentation slides .

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