What is future in Akka?
In Akka, a Future is a data structure used to retrieve the result of some concurrent operation. This operation is usually performed by an Actor or by the Dispatcher directly. This result can be accessed synchronously (blocking) or asynchronously (non-blocking).
What is Akka used for?
Akka is a toolkit and runtime for building highly concurrent, distributed, and fault tolerant applications on the JVM. Akka is written in Scala, with language bindings provided for both Scala and Java. Akka’s approach to handling concurrency is based on the Actor Model.
What is the difference between a Java future and a Scala future?
A Java Future works in a synchronous blocking way. It does not work in an asynchronous non-blocking way, whereas a Scala Future works in an asynchronous non-blocking way. If we want an asynchronous non-blocking feature, we should use Java 8’s CompletableFuture.
What is Scala future?
Future represents a result of an asynchronous computation that may or may not be available yet. When we create a new Future, Scala spawns a new thread and executes its code. Once the execution is finished, the result of the computation (value or exception) will be assigned to the Future.
What is dispatcher in Akka?
Akka is mostly based on ActorSystem and as a result dispatchers are said to be the main engine of an ActorSystem. Hence the saying- dispatchers are what makes Akka “tick”. In Akka, they are responsible for selecting an actor and it’s messages and assigning them to the CPU.
Who uses Akka in production?
Of our 50 case studies and community stories, 39 of them (78%) are using Akka in production–happy clients include Walmart, Hootsuite, Huffington Post, WhitePages, Gilt, and Ticketfly.
What is thread and a future?
Summary: Thread vs Future A Java Thread represents a thread of execution in an Java/Scala/JVM application. You can run code in parallel in a Thread , but a Thread does not have a return type. A Scala Future represents the result of an asynchronous computation, and has a return type.
Is Scala better than Python?
When it comes to performance, Scala is almost ten times faster than Python. Scala’s reliance on the Java Virtual Machine (JVM) during runtime imparts speed to it. Generally, compiled languages perform faster than interpreted languages. Since Python is dynamically typed, the development speed reduces.
What is Scala good for?
What is Scala used for? A lot of things, ranging from machine learning to web apps. As a high-level general purpose language, Scala boasts an extensive range of possible applications. Scala allows developers to make good use of standard JVM features and Java libraries.
Is Akka single threaded?
In Akka, actors are guaranteed to be run in a single-threaded illusion, which means that the Akka framework takes care of threading issues while allowing us to focus on the behavior that needs to be implemented. Actors may only communicate with each other and the outside world by through messages.
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