gerrit.onap Code Review - ccsdk/cds.git/blob

   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.core.scripts
  18
  19 import org.onap.ccsdk.cds.controllerblueprints.core.BluePrintProcessorException
  20 import org.slf4j.LoggerFactory
  21 import java.util.*
  22 import kotlin.reflect.full.createInstance
  23 import kotlin.script.experimental.api.*
  24 import kotlin.script.experimental.host.BasicScriptingHost
  25 import kotlin.script.experimental.jvm.defaultJvmScriptingHostConfiguration
  26 import kotlin.script.experimental.jvmhost.JvmScriptCompiler
  27 import kotlin.script.experimental.jvmhost.impl.withDefaults
  28
  29 val blueprintScriptCompiler = JvmScriptCompiler(defaultJvmScriptingHostConfiguration,
  30         BluePrintsCompilerProxy(defaultJvmScriptingHostConfiguration.withDefaults()))
  31
  32 open class BlueprintScriptingHost(evaluator: ScriptEvaluator) : BasicScriptingHost(blueprintScriptCompiler, evaluator) {
  33
  34     override fun eval(script: SourceCode, scriptCompilationConfiguration: ScriptCompilationConfiguration,
  35                       configuration: ScriptEvaluationConfiguration?): ResultWithDiagnostics<EvaluationResult> =
  36
  37             runInCoroutineContext {
  38
  39                 blueprintScriptCompiler(script, scriptCompilationConfiguration)
  40                         .onSuccess {
  41                             evaluator(it, configuration)
  42                         }.onFailure { failedResult ->
  43                             val messages = failedResult.reports.joinToString("\n")
  44                             throw BluePrintProcessorException(messages)
  45                         }
  46             }
  47 }
  48
  49 open class BluePrintScriptEvaluator(private val scriptClassName: String) : ScriptEvaluator {
  50
  51     private val log = LoggerFactory.getLogger(BluePrintScriptEvaluator::class.java)!!
  52
  53     override suspend operator fun invoke(compiledScript: CompiledScript<*>,
  54                                          scriptEvaluationConfiguration: ScriptEvaluationConfiguration?
  55     ): ResultWithDiagnostics<EvaluationResult> =
  56             try {
  57                 log.debug("Getting script class name($scriptClassName) from the compiled sources ")
  58
  59                 val bluePrintCompiledScript = compiledScript as BluePrintCompiledScript
  60                 bluePrintCompiledScript.scriptClassFQName = scriptClassName
  61
  62                 val classResult = compiledScript.getClass(scriptEvaluationConfiguration)
  63                 when (classResult) {
  64                     is ResultWithDiagnostics.Failure -> classResult
  65                     is ResultWithDiagnostics.Success -> {
  66
  67                         val scriptClass = classResult.value
  68                         val args = ArrayList<Any?>()
  69                         scriptEvaluationConfiguration?.get(ScriptEvaluationConfiguration.providedProperties)?.forEach {
  70                             args.add(it.value)
  71                         }
  72                         scriptEvaluationConfiguration?.get(ScriptEvaluationConfiguration.implicitReceivers)?.let {
  73                             args.addAll(it)
  74                         }
  75                         scriptEvaluationConfiguration?.get(ScriptEvaluationConfiguration.constructorArgs)?.let {
  76                             args.addAll(it)
  77                         }
  78
  79                         val instance = if (args.isNotEmpty()) {
  80                             scriptClass.java.constructors.single().newInstance(*args.toArray())
  81                                     ?: throw BluePrintProcessorException("failed to create instance from the script")
  82                         } else {
  83                             scriptClass.createInstance()
  84                         }
  85
  86                         log.debug("Created script instance of type ${instance.javaClass}")
  87
  88                         ResultWithDiagnostics.Success(EvaluationResult(ResultValue.Value(scriptClass.qualifiedName!!,
  89                                 instance, "", instance),
  90                                 scriptEvaluationConfiguration))
  91                     }
  92                 }
  93             } catch (e: Throwable) {
  94                 ResultWithDiagnostics.Failure(e.asDiagnostics("Error evaluating script"))
  95             }
  96 }