learning akka

I have been learning to use akka for a year. At present, I am still used to writing programs under akka in Java. For native Scala, there is still no time and interest to learn it. After all, learning a language requires interest and time. Akka

Download akka Introduction Akka is a library written in scala. It is used to simplify the compilation of fault tolerant and highly scalable Java and Scala actor model applications. It has been successfully applied in the telecom industry. The system almost never goes down (High Availability 99.9999999% a year only 31 MS down actor model is nothing new, it was proposed by Carl Hewitt in the 1970s s, the pu

. The basic principle of the CQRS mode is to detach the read and write of the database in order to improve the response of the large data type network application. Of course, from another aspect, event-sourcing as a new database operation mode, should be able to solve any database application software commonly faced with the lack of data replay, and the use of database pressure and other issues. The initial intention is to focus on the Persistenceactor-based ES schema database application and th

This blog gradually analyze the source of Akka streams, of course, must be gradual, and estimates will be divided into many, after all, Akka streams is more complex. Implicit val system = Actorsystem ("QuickStart") implicit val Materializer = Actormaterializer () When using streams-related APIs, the above two objects must be created. Actorsystem no longer said, we came to see Actormaterializer. Actormateri

As we all know, Akka system is a distributed computing system based on actor mode, which is very suitable for building big data platform. As a result, there is an unavoidable need to integrate between standalone systems, with heterogeneous systems, and with mobile systems. Because of the heterogeneous and mobile systems involved, the system docking must be conducted on a set of open standards, including data format and transmission standards. In fact,

Scala has been using Akka as a concurrency model since 2.10, and this article is the first example of Akka.1.Akka Getting Started instance PackageCom.tv189.actorImportAkka.actor. {Actor, Actorsystem, Props}/*** Created by Molyeo on 2015/8/6.*/Object AkkaTest01extendsApp {val system= Actorsystem ("Akkatest") Val Helloactor= System.actorof (Props[helloactor], name

Often people ask: what is the difference between Akka's actor and Scala's actor? The answer here is that, from the Actor model point of view, there is no difference, they all implement the actor model.Akka actors and Scala actors are both implementations of that model.All actors model says that your concurrency primitives is actors, which can: receive a message and decide what does next depending on the content of the message, including: send messages to any actors they know abo

Akkais a concurrent processing framework based on the Actor model implementation. Event-driven concurrency processing model, each actor has its own properties and operations, which avoids the usual situation because multiple threads share attributes (data) instead of locking mechanisms. This mechanism is applied well in the Scala,cloure language, and the operations and attributes are processed in a separate unit to improve the ability of concurrent processing. Five characteristics of

created by Actors.' Stop ' is often applied to ' self '.10. Complete ExamplePackage Week5import Akka.actor.Actorimport Akka.actor.Propsclass Countermain extends actor {val counter = Context.actoroF (Props[counter], "Counter") Counter!"INCR" Counter!"INCR" Counter! "GET" def receive = {Case Count:int = println (S "Count is $count") Context.stop (self)}Package Week5import Akka.actor.Actorclass Counter extends actor {var count = 0 def receive = {case "incr" = = CouNT + = 1 case "Get" = sender! Cou

= actorsystem.create ("Mysystem") using props; Final Actorref Actor1 = system.actorof (Props1, "Actor1"); Final Actorref Actor2 = system.actorof (PROPS2, "Actor2"); Actor2.tell (Msg.hi, Actor1); System.stop (Actor1); System.stop (ACTOR2); System.shutdown (); } public static void Main (string[] args) {communication (); } } The props1 created above, the parameters passed are Actor1.class, "Actor1", 1. where "Actor1" and 1 correspond to two parameters of a constructor. Back to Act

This document has been translated from building Analytics Engine Using Akka, Kafka ElasticSearch, and has been licensed by the original author Satendra Kumar and the website.In this article, I'll share with you my experience in building large, distributed, fault-tolerant, extensible analysis engines with Scala, Akka, Play, Kafka, and Elasticsearch.My analysis engine is mainly used for text analysis. Input

Actor model and Akka I. Actor model Actor Model ConceptA conceptual model for dealing with concurrency computation the state of an actor is maintained by its own behavior, and external threads cannot invoke the behavior of the object directly, and must pass the message to excite the behavior, thus guaranteeing that the actor's internal data is modified only by itself Actor Model Composition The Actor model is detailed in the Actor model, everything

Want to get Akka http, used for our open source project football, found Akka http in the case of a large number of Akka stream, and Akka HTTP is built on the Akka stream.So let's take a look at Akka stream first to understand the

Akka entry-become and unbecome, akkaunbecomeAkka supports real-time replacement of the role message loop (such as its implementation) at runtime: Call the getContext. become method in the role. Hot replacement code is stored in a stack and can be pushed (replacing or adding at the top) and popped.A particularly good example of become is to use it to implement a finite state machine.The Become/Unbecome feature can also be used to conveniently implement

Akka What is akka? Directly reference the above description on the akka Website: Akka is a toolkit and runtime for building highly concurrent, distributed, and fault tolerant event-driven applications on the JVM. Anyway, I think akka is difficult to get starte

Before play 2.6.x, the play defaults to using the Netty service backend. By 2.6.x, the default service backend is replaced with Akka HTTP, but it is still possible to manually select the Netty service backend. To upgrade to 2.6.x, you need to be aware of this. Because Akka HTTP servers are slower than Netty HTTP servers. So if you are particularly sensitive to performance, you will need to manually select t

Akka is a concurrent processing framework based on the actor model. Based on the event-driven concurrent processing model, each actor has its own attributes and operations, thus avoiding the need to share attributes (data) between multiple threads) instead, the lock mechanism is used for processing. This mechanism is well applied in Scala and cloure languages. It puts operations and attributes in an independent unit for processing, thus improving the

into future, but it may cause performance problems and OOM. Solution to the blocking problem: Place blocking calls in one or more actor-managed router. Make sure to configure a thread pool When putting blocking into the future, you must ensure that there is a maximum number of future calls; otherwise, oom is easy. You can also configure a thread pool with an upper limit. Use a single thread to manage a group of blocked resources and issue events through actor messages. Actorref State serial

First part: Actor Architecture Akka version 2.5.8Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced. Akka provides you with some basic functionality for creating an actor system, and has implemented the underlying code necessary to control basic behavior. To understand this, let's take a look at the relationship between the actor role you created and

How Spark uses Akka to implement process, node communication"In-depth understanding of spark: core ideas and source analysis," The preface of the book, please see the link "in-depth understanding of spark: core ideas and source analysis," a book officially published listing"In-depth understanding of spark: core ideas and source analysis," the first chapter of the content, please see the link to the 1th Chapter environment preparation"In-depth understa