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:

 "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
)

Add the lib directory

Copy the lib directory from the AppTwo sample (code/internal-samples/AppTwo). This contains the StringTemplate ST-4.0.7.jar which is needed for code generation. StringTemplate is not used by MEF at runtime.

Run app and create Eclipse or IDEA project

play eclipse
play run

Open your browser to localhost:9000 and you should see the Play start page for a new project.

Create your code generation

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

Create an mgen source folder

In the root of your project create mgen folder and add as source folder (in Java Build Path in Eclipse). You should now how three source folders

app
mgen
test

Create a new JUnit class AppCodeGen.java

    public class AppCodeGen
    {
	@Test
	public void codeGen() throws Exception
	{
		AppScaffoldCodeGenerator gen = new AppScaffoldCodeGenerator();
		boolean b = gen.generateAll();
		assertTrue(b);
	}
    }

And run it. Then delete this file. You don't need it anymore.

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)

You're Ready to begin building your Entities and Presenters

---