Is it possible to have both java and scala controllers and views in play framework project when the project is created with scala option?
Add a comment
|
1 Answer
Yes, it's possible to mix Java and Scala in a Play application. You can mix both Java and Scala controllers and Groovy and Scala templates. The instructions below have been tested with Play! 1.2.2RC1.
I would start by keeping both your Java and Scala controllers in app/controllers. Java is of course limited to one class per file, but in Scala packages are not tied to files and directories, so you can give your Scala file any name; as long as you declare the package correctly as
package controllers
Play should have not trouble finding them.
Scala templates should end in .scala.html and Groovy templates in plain .html. In a Scala controller, you render Scala templates with html.templatename and Groovy templates with Template("templatename").
I have never tried rendering a Scala template from a Java controller, but I don't see why it should not be feasible.
Finally, here's a useful reminder on Scala/Java interop.
3 Comments
ace
Thanks. So it looks like scala file can be anywhere under app/controllers regardless of its package declaration. But Java files must follow directory structure according to the package.
ace
Well I did not try java controller in scala project but I did try java class that is not a controller but like a service class but play hangs and does not work even if I just put the java file and not even being used.
Ludovico Fischer
That seems strange. Maybe it is better if you ask another question with a more detailed description of this problem (where exactly did you put that Java file?)