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Akka Notes – ActorSystem (Configuration and Scheduling) – 4

As we saw from our previous posts, we could create an Actor using the actorOf method of the ActorSystem. There’s actually much more you could do with ActorSystem. We’ll ...
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Property-based testing with ScalaCheck – custom generators

One of the core data structures provided by Hazelcast is IMap<K, V> extending java.util.concurrent.ConcurrentMap – which is basically a distributed map, often used as cache. ...
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Akka Notes – Actor Messaging – Request and Response – 3

Last time when we saw Actor messaging, we saw how fire-n-forget messages are sent (Meaning, we just send a message to the Actor but don’t expect a response from the Actor). Technically, ...
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Akka Notes – Actor Messaging – 1

From the introductory first part of the Akka Notes, we saw a bird’s eye view of Actors in the Akka Toolkit. In this second part of the Akka Notes, we’ll look at the messaging ...
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For All You Know, It’s Just a Java Library

Blast from the past… I wrote this in May, 2008… and I’ve gotta say, I was pretty spot-on including Java 8 adopting some of Scala’s better features: It’s ...
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Use Cases for Elasticsearch: Index and Search Log Files

In the last posts we have seen some of the properties of using Elasticsearch as a document store, for searching text content and geospatial search. In this post we will look at how ...
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Scala and Java 8 type inference in higher order functions sample

One of the concepts mentioned in the Functional Programming in Scala is about the type inference in higher order functions in Scala and how it fails in certain situations and a workaround ...
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Akka Cluster with Docker containers

This article will show you how to build docker images that contain a single akka cluster application. You will be able to run multiple seed nodes and multiple cluster nodes. The code ...
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Test your Dependencies with Degraph

I wrote before about (anti)patterns in package dependencies. And of course the regular reader of my blog knows about Degraph, my private project to provide a visualization for ...
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Making the Reactive Queue durable with Akka Persistence

Some time ago I wrote how to implement a reactive message queue with Akka Streams. The queue supports streaming send and receive operations with back-pressure, but has one downside: ...
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