Effective Akka by Jamie Allen

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By Jamie Allen

Avoid universal errors while development disbursed, asynchronous, high-performance software program with the Akka toolkit and runtime.

With this concise consultant, writer Jamie Allen presents a set of top practices in response to numerous years of utilizing the actor version. The e-book additionally contains examples of actor program varieties and basic styles of actor utilization, the additional development and Cameo Pattern.

Allen, the Director of Consulting for Typesafe—creator of Akka and the Scala programming language—examines actors with a banking-service use case during the e-book, utilizing examples proven in Akka and Scala. when you've got any event with Akka, this advisor is essential.

• Delve into domain-driven and work-distribution actor applications;
• comprehend why it’s very important to have actors do just one job;
• stay away from thread blockading through permitting common sense to be delegated to a Future;
• version interactions as easily as attainable to prevent untimely optimization;
• Create well-defined interactions, and be aware of precisely what disasters can occur;
• study why you need to by no means deal with actors as you are going to a regular class;
• hold music of what is going on in creation through tracking everything;
• song Akka purposes with the Typesafe Console.

Who This publication Is For

This ebook is for builders who've advanced past the introductory level of writing Akka functions and want to comprehend most sensible practices for improvement that might aid them keep away from universal missteps.

Many of the guidelines are proper open air of Akka in addition, if it is utilizing one other actor library, Erlang, or simply undeniable asynchronous development.

This booklet isn't really for builders who're new to Akka and are trying to find introductory info.

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Extra resources for Effective Akka

Sample text

We call this an eavesdropping fault of a process. As the example of attacks mounted by remote adversaries against machines connected to the Internet shows, such eavesdropping faults occur in practice. An eavesdropping fault cannot be detected by observing how an affected process behaves in an algorithm, as the process continues to perform all actions according to its instructions. The adversary merely reads the internal state of all faulty processes. In practice, however, the eavesdropper must run some code on the physical machine that hosts the faulty process, in order to mount the attack, and the presence of such code can be detected and will raise suspicion.

Cryptographic abstractions are introduced in the next section. 3 Cryptographic Abstractions Algorithms that operate in untrusted environments, where messages may be exposed to a malicious adversary, rely on cryptographic methods for their protection. The basic cryptographic primitives considered here are: hash functions, MACs, and digital signatures. The physical implementations of the cryptographic abstractions usually rely on some keys being present at all processes. Distributing the right keys to all participants in a distributed computation is the task of key management, which is outside the scope of this book (see also Sect.

Indication: th, Error | job : Indicates that the transformation of the given job failed. Properties: TH1: Guaranteed response: Every submitted job is eventually confirmed or its transformation fails. TH2: Soundness: A submitted job whose transformation fails is not processed. with the underlying job handler and waits before submitting the next job until the previously submitted job has been confirmed. 1), the run-time system does not need any unbounded buffers. Modules are usually instantiated statically; this happens only once and occurs implicitly when the implementation of another component includes the module among the list of its used modules.

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