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October 17, 2015 20:14
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Governator bootstrap injector binding problem
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| name := "reproGovernator" | |
| libraryDependencies += "com.netflix.governator" % "governator" % "1.10.5" | |
| libraryDependencies += "com.google.inject" % "guice" % "4.0" |
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| package com.example | |
| import javax.inject.Inject | |
| import com.google.inject.{Injector, Stage, AbstractModule} | |
| import com.netflix.governator.guice.LifecycleInjector | |
| import scala.reflect.ClassTag | |
| case class Foo(a: String = "") | |
| class CommonModule extends AbstractModule { | |
| override def configure(): Unit = { | |
| bind(classOf[Foo]).toInstance(new Foo("asdf")) | |
| } | |
| } | |
| /** | |
| * Similar to Play!'s `play.api.inject.Injector` trait. | |
| */ | |
| trait InjectorWrapper { | |
| // Make available externally. | |
| val guiceInjector: Injector | |
| def instanceOf[T: ClassTag]: T | |
| def instanceOf[T](clazz: Class[T]): T | |
| } | |
| class SimpleInjector @Inject() (override val guiceInjector: Injector) extends InjectorWrapper { | |
| override def instanceOf[T](implicit classTag: ClassTag[T]) = | |
| instanceOf(classTag.runtimeClass.asInstanceOf[Class[T]]) | |
| override def instanceOf[T](clazz: Class[T]): T = guiceInjector.getInstance(clazz) | |
| } | |
| class ComplexInjector @Inject() (override val guiceInjector: Injector, val foo: Foo) extends InjectorWrapper { | |
| override def instanceOf[T](implicit classTag: ClassTag[T]) = | |
| instanceOf(classTag.runtimeClass.asInstanceOf[Class[T]]) | |
| override def instanceOf[T](clazz: Class[T]): T = guiceInjector.getInstance(clazz) | |
| } | |
| class SimpleModule extends AbstractModule { | |
| override def configure(): Unit = { | |
| bind(classOf[InjectorWrapper]).to(classOf[SimpleInjector]) | |
| install(new CommonModule) | |
| } | |
| } | |
| class ComplexModule extends AbstractModule { | |
| override def configure(): Unit = { | |
| bind(classOf[InjectorWrapper]).to(classOf[ComplexInjector]) | |
| install(new CommonModule) | |
| } | |
| } | |
| object Hello { | |
| def main(args: Array[String]): Unit = { | |
| val simpleInjectorBld = LifecycleInjector.builder().inStage(Stage.DEVELOPMENT).withModules(new SimpleModule).build() | |
| val simpleInjector = simpleInjectorBld.createInjector() | |
| val simpleInjectorWrapper = simpleInjector.getInstance(classOf[InjectorWrapper]) | |
| println("Simple Injector Wrapper underlying:") | |
| println(simpleInjectorWrapper.guiceInjector) | |
| println("\nSimple Injector Wrapper underlying parent:") | |
| println(simpleInjectorWrapper.guiceInjector.getParent) | |
| println("\nSimple Injector parent:") | |
| println(simpleInjector.getParent) | |
| println("\nSimple injector:") | |
| println(simpleInjector) | |
| println("\n\n") | |
| val complexInjectorBld = LifecycleInjector.builder().inStage(Stage.DEVELOPMENT).withModules(new ComplexModule).build() | |
| val complexInjector = complexInjectorBld.createInjector() | |
| val complexInjectorWrapper = complexInjector.getInstance(classOf[InjectorWrapper]) | |
| println("Complex Injector Wrapper underlying:") | |
| println(complexInjectorWrapper.guiceInjector) | |
| println("\nComplex Injector Wrapper underlying parent:") | |
| println(complexInjectorWrapper.guiceInjector.getParent) | |
| println("\nComplex Injector parent:") | |
| println(complexInjector.getParent) | |
| println("\nComplex Injector:") | |
| println(complexInjector) | |
| println("\nFoo:") | |
| println(complexInjectorWrapper.asInstanceOf[ComplexInjector].foo) | |
| } | |
| } |
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The output from running this is the following: