akka.actor.DynamicAccess.scala Maven / Gradle / Ivy
/*
* Copyright (C) 2009-2019 Lightbend Inc.
*/
package akka.actor
import scala.collection.immutable
import scala.reflect.ClassTag
import scala.util.Try
/**
* The DynamicAccess implementation is the class which is used for
* loading all configurable parts of an actor system (the
* [[akka.actor.ReflectiveDynamicAccess]] is the default implementation).
*
* This is an internal facility and users are not expected to encounter it
* unless they are extending Akka in ways which go beyond simple Extensions.
*/
abstract class DynamicAccess {
/**
* Convenience method which given a `Class[_]` object and a constructor description
* will create a new instance of that class.
*
* {{{
* val obj = DynamicAccess.createInstanceFor(clazz, Seq(classOf[Config] -> config, classOf[String] -> name))
* }}}
*/
def createInstanceFor[T: ClassTag](clazz: Class[_], args: immutable.Seq[(Class[_], AnyRef)]): Try[T]
/**
* Obtain a `Class[_]` object loaded with the right class loader (i.e. the one
* returned by `classLoader`).
*/
def getClassFor[T: ClassTag](fqcn: String): Try[Class[_ <: T]]
/**
* Obtain an object conforming to the type T, which is expected to be
* instantiated from a class designated by the fully-qualified class name
* given, where the constructor is selected and invoked according to the
* `args` argument. The exact usage of args depends on which type is requested,
* see the relevant requesting code for details.
*/
def createInstanceFor[T: ClassTag](fqcn: String, args: immutable.Seq[(Class[_], AnyRef)]): Try[T]
/**
* Obtain the Scala “object” instance for the given fully-qualified class name, if there is one.
*/
def getObjectFor[T: ClassTag](fqcn: String): Try[T]
/**
* This is the class loader to be used in those special cases where the
* other factory method are not applicable (e.g. when constructing a ClassLoaderBinaryInputStream).
*/
def classLoader: ClassLoader
}
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