2 * Copyright © 2019 IBM.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 package org.onap.ccsdk.cds.controllerblueprints.core.service
19 import org.onap.ccsdk.cds.controllerblueprints.core.BlueprintProcessorException
20 import org.springframework.context.ApplicationContext
21 import org.springframework.context.ConfigurableApplicationContext
22 import kotlin.reflect.KClass
25 * Generic Bluepring Dependency Service, which will be used mainly in scripts.
26 * This will be initialised only once during the Application startup.
27 * Function modules, shall add their own dependency function names as an extension function.
29 * @author Brinda Santh
32 object BlueprintDependencyService {
34 lateinit var applicationContext: ApplicationContext
36 fun inject(applicationContext: ApplicationContext) {
37 BlueprintDependencyService.applicationContext = applicationContext
40 /** Used to inject [instance] into spring application context for the [key],
41 * Use this method only for testing
43 fun registerSingleton(key: String, instance: Any) {
44 val configurableApplicationContext = applicationContext as ConfigurableApplicationContext
45 configurableApplicationContext.beanFactory.registerSingleton(key, instance)
48 inline fun <reified T> instance(name: String): T {
49 return applicationContext.getBean(name) as? T
50 ?: throw BlueprintProcessorException("failed to get instance($name)")
53 inline fun <reified T> instance(type: Class<T>): T {
54 return applicationContext.getBean(type)
55 ?: throw BlueprintProcessorException("failed to get instance($type)")
58 inline fun <reified T> instance(type: KClass<*>): T {
59 return applicationContext.getBean(type.java) as? T
60 ?: throw BlueprintProcessorException("failed to get instance($type)")