Issue-vert-x#30 Initial commit for compiling scala verticles.

src/main/scala/org/vertx/scala/platform/impl/ScalaVerticleFactory.scala

@@ -16,6 +16,7 @@
 
 package org.vertx.scala.platform.impl
 
+import scala.collection.mutable
 import scala.reflect.internal.util.BatchSourceFile
 import scala.reflect.io.Path.string2path
 import scala.reflect.io.PlainFile
@@ -26,7 +27,6 @@ import org.vertx.java.core.{Vertx => JVertx}
 import org.vertx.java.platform.{Container => JContainer}
 import org.vertx.java.platform.{Verticle => JVerticle}
 import org.vertx.java.platform.VerticleFactory
-import org.vertx.scala.core.Vertx
 import org.vertx.scala.platform.Verticle
 
 /**
@@ -35,7 +35,7 @@ import org.vertx.scala.platform.Verticle
  */
 class ScalaVerticleFactory extends VerticleFactory {
 
-  protected val PREFIX: String = "scala:"
+  protected val SUFFIX: String = ".scala"
 
   private val settings = new Settings()
 
@@ -47,22 +47,23 @@ class ScalaVerticleFactory extends VerticleFactory {
 
   private var interpreter: IMain = null
 
+  private val classLoader = classOf[ScalaVerticleFactory].getClassLoader
+
+  private val classCache = mutable.Map[String, java.lang.Class[_]]()
+
   override def init(jvertx: JVertx, jcontainer: JContainer, aloader: ClassLoader): Unit = {
     this.jvertx = jvertx
     this.jcontainer = jcontainer
     this.loader = aloader
-    settings.embeddedDefaults(aloader)
-    settings.usejavacp.value = true
-    // settings.verbose.value = true
-    interpreter = new IMain(settings)
-    interpreter.setContextClassLoader()
+
+    println("HELLO WORLD")
+
+    initializeScalaInterpreter()
   }
 
   @throws(classOf[Exception])
   override def createVerticle(main: String): JVerticle = {
-    // TODO: main without language Id is passed in.
-    //val rawClass = if (main.startsWith(PREFIX)) loader.loadClass(main.replaceFirst(PREFIX, "")) else loadScript(main)
-    val rawClass = loader.loadClass(main.replaceFirst(PREFIX, ""))
+    val rawClass = if (!main.endsWith(SUFFIX)) loader.loadClass(main) else loadScript(main)
     val delegate = rawClass.newInstance().asInstanceOf[Verticle]
     ScalaVerticle.newVerticle(delegate, jvertx, jcontainer)
   }
@@ -77,10 +78,34 @@ class ScalaVerticleFactory extends VerticleFactory {
 
   @throws(classOf[Exception])
   private def loadScript(main: String): Class[_] = {
-    val resolved = loader.getResource(main).toExternalForm()
-    interpreter.compileSources(new BatchSourceFile(PlainFile.fromPath(resolved.replaceFirst("file:", ""))))
+    val resolved = loader.getResource(main).toExternalForm
     val className = main.replaceFirst(".scala$", "").replaceAll("/", ".")
-    interpreter.classLoader.loadClass(className)
+    var cls = classCache.get(className).getOrElse(null)
+
+    if (cls == null) {
+      interpreter.compileSources(new BatchSourceFile(PlainFile.fromPath(resolved.replaceFirst("file:", ""))))
+      cls = interpreter.classLoader.loadClass(className)
+    }
+
+    classCache += className -> cls
+
+    cls
+  }
+
+  private def initializeScalaInterpreter(): Unit = {
+    val scalaLibrary = classLoader.getResource("./lib/scala-library-2.10.2.jar").toExternalForm
+    val scalaReflectLibrary = classLoader.getResource("./lib/scala-reflect-2.10.2.jar").toExternalForm
+    val modLangScala = classLoader.getResource("./").toExternalForm
+
+    settings.bootclasspath.append(scalaLibrary.replaceFirst("file:", ""))
+    settings.bootclasspath.append(scalaReflectLibrary.replaceFirst("file:", ""))
+    settings.bootclasspath.append(modLangScala.replaceFirst("file:", ""))
+
+    settings.usejavacp.value = true
+    settings.verbose.value = true
+    interpreter = new IMain(settings)
+    interpreter.classLoader
+    interpreter.setContextClassLoader()
   }
 
 }