ms/controllerblueprints/modules/blueprint-scripts/src/main/kotlin/org/onap/ccsdk/cds/controllerblueprints/scripts/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.cds.controllerblueprints.scripts
  18
  19 import org.onap.ccsdk.cds.controllerblueprints.core.BluePrintProcessorException
  20 import org.slf4j.LoggerFactory
  21 import java.util.*
  22 import kotlin.script.experimental.api.*
  23 import kotlin.script.experimental.host.BasicScriptingHost
  24 import kotlin.script.experimental.jvm.defaultJvmScriptingHostConfiguration
  25 import kotlin.script.experimental.jvmhost.JvmScriptCompiler
  26 import kotlin.script.experimental.jvmhost.impl.withDefaults
  27
  28 val blueprintScriptCompiler = JvmScriptCompiler(defaultJvmScriptingHostConfiguration,
  29         BluePrintsCompilerProxy(defaultJvmScriptingHostConfiguration.withDefaults()))
  30
  31 open class BlueprintScriptingHost(evaluator: ScriptEvaluator) : BasicScriptingHost(blueprintScriptCompiler, evaluator) {
  32
  33     override fun eval(
  34             script: SourceCode,
  35             scriptCompilationConfiguration: ScriptCompilationConfiguration,
  36             configuration: ScriptEvaluationConfiguration?
  37     ): ResultWithDiagnostics<EvaluationResult> =
  38
  39             runInCoroutineContext {
  40
  41                 compiler(script, scriptCompilationConfiguration)
  42                         .onSuccess {
  43                             evaluator(it, configuration)
  44                         }.onFailure { failedResult ->
  45                             val messages = failedResult.reports?.joinToString("\n")
  46                             throw BluePrintProcessorException(messages)
  47                         }
  48             }
  49 }
  50
  51 open class BluePrintScriptEvaluator(private val scriptClassName: String) : ScriptEvaluator {
  52
  53     private val log = LoggerFactory.getLogger(BluePrintScriptEvaluator::class.java)!!
  54
  55     override suspend operator fun invoke(
  56             compiledScript: CompiledScript<*>,
  57             scriptEvaluationConfiguration: ScriptEvaluationConfiguration?
  58     ): ResultWithDiagnostics<EvaluationResult> =
  59             try {
  60                 log.debug("Getting script class name($scriptClassName) from the compiled sources ")
  61                 val bluePrintCompiledScript = compiledScript as BluePrintCompiledScript
  62                 bluePrintCompiledScript.scriptClassFQName = scriptClassName
  63
  64                 val res = compiledScript.getClass(scriptEvaluationConfiguration)
  65                 when (res) {
  66                     is ResultWithDiagnostics.Failure -> res
  67                     is ResultWithDiagnostics.Success -> {
  68
  69                         val scriptClass = res.value
  70                         val args = ArrayList<Any?>()
  71                         scriptEvaluationConfiguration?.get(ScriptEvaluationConfiguration.providedProperties)?.forEach {
  72                             args.add(it.value)
  73                         }
  74                         scriptEvaluationConfiguration?.get(ScriptEvaluationConfiguration.implicitReceivers)?.let {
  75                             args.addAll(it)
  76                         }
  77                         scriptEvaluationConfiguration?.get(ScriptEvaluationConfiguration.constructorArgs)?.let {
  78                             args.addAll(it)
  79                         }
  80
  81                         val instance = scriptClass.java.constructors.single().newInstance(*args.toArray())
  82                                 ?: throw BluePrintProcessorException("failed to create instance from the script")
  83
  84                         log.info("Created script instance of type ${instance.javaClass}")
  85
  86                         ResultWithDiagnostics.Success(EvaluationResult(ResultValue.Value(scriptClass.qualifiedName!!,
  87                                 instance, "", instance),
  88                                 scriptEvaluationConfiguration))
  89                     }
  90                 }
  91             } catch (e: Throwable) {
  92                 ResultWithDiagnostics.Failure(e.asDiagnostics("Error evaluating script"))
  93             }
  94 }