Installing MEF

MEF is available as a github repository. Include it in your project by following these instructions.

Build.scala

Add this to your appDependencies:

 "commons-io" % "commons-io" % "2.3",
 "mettle" % "mettle_2.10" % "1.0-SNAPSHOT"

Then set your project to include a resolver:

val main = PlayProject(appName, appVersion, appDependencies, mainLang = JAVA).settings(
  resolvers += Resolver.url("Mettle Repository", url("http://ianrae.github.io/snapshot/"))(Resolver.ivyStylePatterns),
  checksums := Nil
)

Create your code generation

Eventually MEF will add commands in SBT. Until then, use JUnit tests to do code generation

MGEN_AppScaffold

This JUnit test uses the MEF AppScaffoldCodeGenerator class to generate the initial MEF files and directories needed by your app.

MGEN_PresenterScaffold

This JUnit test uses the MEF PresenterScaffoldCodeGenerator class to generate a new presenter and some of its associated files

MGEN_Daos

This JUnit test uses the MEF DalCodeGenerator class to generate all your DAO objects. Run this every time you modify mef.xml, such as to add a field to a model.

Run the initial "app" code generation

This will create the mef directory structure and some intial files.

app boundaries layer that sits between Play and MEF

mef
    core   		 initialization code
    dals        (daos) database persistence
    entities    the 'model object in MEF (POJOs)
    gen         codegen puts stuff here
    presenters  holds business logic. equivalent to a controller

conf
  mef/seed       JSON database initialization files

test
  mef            unit tests (no FakeApplication needed)