Add configurable scripting host to Olive

- Fix normalization again for reused scripting host
 - Reduce verbosity

orx-olive/src/main/kotlin/Olive.kt

@@ -25,11 +25,18 @@ private fun <T> Event<T>.restoreListeners(store: Map<Event<*>, List<(Any) -> Uni
     listeners.retainAll(store[this] ?: emptyList<T>())
 }
 
+enum class OliveScriptHost {
+    JSR223,
+    JSR223_REUSE,
+    KOTLIN_SCRIPT
+}
+
 class Olive<P : Program>(val resources: Resources? = null) : Extension {
     override var enabled: Boolean = true
     var session: Session? = null
+    var scriptHost = OliveScriptHost.JSR223_REUSE
 
-    internal var scriptChange: (String)->Unit = {}
+    internal var scriptChange: (String) -> Unit = {}
 
     var script = "src/main/kotlin/live.kts"
         set(value) {
@@ -70,7 +77,7 @@ class Olive<P : Program>(val resources: Resources? = null) : Extension {
 
         trackedListeners.forEach { it.saveListeners(store) }
 
-        fun setupScript(scriptFile:String) {
+        fun setupScript(scriptFile: String) {
             watcher?.stop()
             val f = File(scriptFile)
             if (!f.exists()) {
@@ -94,14 +101,23 @@ class Olive<P : Program>(val resources: Resources? = null) : Extension {
             """.trimIndent())
             }
 
+            val jsr233ObjectLoader = if (scriptHost == OliveScriptHost.JSR223_REUSE) ScriptObjectLoader() else null
+
             watcher = program.watchFile(File(script)) {
                 try {
+                    logger.info("change detected, reloading script")
                     val futureFunc = GlobalScope.async {
                         val start = System.currentTimeMillis()
-                        val f = loadFromScriptKSH<P.() -> Unit>(it)
+
+                        val loadedFunction = when (scriptHost) {
+                            OliveScriptHost.JSR223_REUSE -> loadFromScript(it, jsr233ObjectLoader!!)
+                            OliveScriptHost.JSR223 -> loadFromScript(it)
+                            OliveScriptHost.KOTLIN_SCRIPT -> loadFromScriptKSH<P.() -> Unit>(it)
+                        }
+
                         val end = System.currentTimeMillis()
                         logger.info { "loading script took ${end - start}ms" }
-                        f
+                        loadedFunction
                     }
 
                     program.launch {

orx-olive/src/main/kotlin/Reloadable.kt

@@ -1,10 +1,12 @@
 package org.openrndr.extra.olive
 
+import mu.KotlinLogging
 import kotlin.reflect.KMutableProperty1
 import kotlin.reflect.KProperty1
 import kotlin.reflect.full.declaredMemberProperties
 import kotlin.reflect.jvm.jvmName
 
+private val logger = KotlinLogging.logger {}
 
 private val store = mutableMapOf<String, Any>()
 
@@ -19,11 +21,9 @@ fun clearReloadables() {
  * A class with which persistent state can be reloaded from inside Olive scripts.
  */
 open class Reloadable {
-
-
-    // -- since kotlin 1.3.61 the scripting host prepends class names with the host id
     private fun normalizeClassName(name: String): String {
-        return name.replace(Regex("ScriptingHost[0-9a-f]+_"), "")
+        return name.replace(Regex("ScriptingHost[0-9a-f]+_"), // -- since kotlin 1.3.61 the scripting host prepends class names with the host id
+                "").replace(Regex("Line_[0-9]+"),"") // -- when reusing the script engine the line number increments.
     }
 
     /**
@@ -41,14 +41,14 @@ open class Reloadable {
                         val value = (e as KProperty1<Any, Any?>).get(existing)
                         val mp = (p as KMutableProperty1<Any, Any?>)
                         mp.set(this, value as Any)
-                        println("reloaded property ${p.name} <- ${value}")
+                        logger.info("reloaded property ${p.name} <- ${value}")
                     } catch (e: Throwable) {
-                        println("error while reloading property ${p.name}: ${e.message}")
+                        logger.warn("error while reloading property ${p.name}: ${e.message}")
                     }
                 }
             }
         } else {
-            println("no existing store found for $className")
+            logger.info("no existing store found for $className")
         }
         store[normalizeClassName(this::class.jvmName)] = this
     }