components/core/src/main/kotlin/org/onap/ccsdk/apps/controllerblueprints/core/script/BlueprintScriptingHost.kt

   1 /*
   2  * Copyright © 2017-2018 AT&T Intellectual Property.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.onap.ccsdk.apps.controllerblueprints.core.script
  18
  19 import org.onap.ccsdk.apps.controllerblueprints.core.BluePrintProcessorException
  20 import org.slf4j.LoggerFactory
  21 import kotlin.script.experimental.api.*
  22 import kotlin.script.experimental.host.BasicScriptingHost
  23 import kotlin.script.experimental.jvm.defaultJvmScriptingHostConfiguration
  24 import kotlin.script.experimental.jvmhost.JvmScriptCompiler
  25
  26 val defaultBlueprintScriptCompiler = JvmScriptCompiler(defaultJvmScriptingHostConfiguration)
  27
  28 open class BlueprintScriptingHost(evaluator: ScriptEvaluator
  29 ) : BasicScriptingHost(defaultBlueprintScriptCompiler, evaluator) {
  30
  31     override fun eval(
  32             script: SourceCode,
  33             scriptCompilationConfiguration: ScriptCompilationConfiguration,
  34             configuration: ScriptEvaluationConfiguration?
  35     ): ResultWithDiagnostics<EvaluationResult> =
  36
  37             runInCoroutineContext {
  38
  39                 compiler(script, scriptCompilationConfiguration)
  40                         .onSuccess {
  41                             evaluator(it, configuration)
  42                         }
  43             }
  44 }
  45
  46
  47 open class BluePrintScriptEvaluator(private val scriptClassName: String) : ScriptEvaluator {
  48
  49     val log = LoggerFactory.getLogger(BluePrintScriptEvaluator::class.java)!!
  50
  51     override suspend operator fun invoke(
  52             compiledScript: CompiledScript<*>,
  53             scriptEvaluationConfiguration: ScriptEvaluationConfiguration?
  54     ): ResultWithDiagnostics<EvaluationResult> =
  55             try {
  56                 val res = compiledScript.getClass(scriptEvaluationConfiguration)
  57                 when (res) {
  58                     is ResultWithDiagnostics.Failure -> res
  59                     is ResultWithDiagnostics.Success -> {
  60                         val scriptClass = res.value
  61                         val args = ArrayList<Any?>()
  62                         scriptEvaluationConfiguration?.get(ScriptEvaluationConfiguration.providedProperties)?.forEach {
  63                             args.add(it.value)
  64                         }
  65                         scriptEvaluationConfiguration?.get(ScriptEvaluationConfiguration.implicitReceivers)?.let {
  66                             args.addAll(it)
  67                         }
  68                         scriptEvaluationConfiguration?.get(ScriptEvaluationConfiguration.constructorArgs)?.let {
  69                             args.addAll(it)
  70                         }
  71
  72                         val completeScriptClass = "Script\$$scriptClassName"
  73                         log.info("Searching for class type($completeScriptClass)")
  74                         /**
  75                          * Search for Class Name
  76                          */
  77                         val instanceClass = scriptClass.java.classes
  78                                 .single { it.name == completeScriptClass }
  79                                 //.single { it.name == "Script\$SampleBlueprintsFunctionNode" }
  80
  81
  82                         val instance = instanceClass.newInstance()
  83                                 ?: throw BluePrintProcessorException("failed to create instance from the script")
  84
  85                         ResultWithDiagnostics.Success(EvaluationResult(ResultValue.Value(completeScriptClass,
  86                                 instance, instance.javaClass.typeName),
  87                                 scriptEvaluationConfiguration))
  88                     }
  89                 }
  90             } catch (e: Throwable) {
  91                 ResultWithDiagnostics.Failure(e.asDiagnostics("Error evaluating script"))
  92             }
  93 }