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Akka Course

Akka helps you to build scalable, resilient, and fault-tolerant distributed systems that can provide outstanding performance on local machines as well as over remote networks.

Akka Training Course Details

Introduction
Akka helps you to build scalable, resilient, and fault-tolerant distributed systems that can provide outstanding performance on local machines as well as over remote networks.
Employing the actor model, it is possible to leverage these lightweight entities to program highly available, high performance applications.
It delivers a powerful scaffolding that can be used to delegate remoting, service failures, and load management so that you can focus solely on your system logic.
Learning Akka delivers a clear and practical introduction to the Akka toolkit, explaining the key components you need to know to get up and running with developing applications of your own.

Akka Course Curriculum

Akka delivers a clear and practical introduction to the Akka toolkit, explaining the key components you need to know to get up and running with developing applications of your own.
• Section 1: Exploring the Actor World
• Section 2: Playing with Actors
• Section 3: Working with Akka Basic Tools
• Section 4: Akka Persistence
• Section 5: Working with Akka Cluster
• Section 6: Testing Actors
• Section 7: Working with Akka Streams
• Section 8: Working with Akka HTTP
• Section 9: Working with Common Patterns in Akka

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Why OutOfMemoryError?

It can be many reasons for OutOfMemoryError. For example, in a pure push based system with message consumers that are potentially slower than corresponding message producers you must add some kind of message flow control. Otherwise messages will be queued in the consumers’ mailboxes and thereby filling up the heap memory

Which options shall I enable when debugging remoting issues?

Have a look at the Remote Configuration, the typical candidates are:

  • remote.log-sent-messages
  • remote.log-received-messages
  • remote.log-remote-lifecycle-events(this also includes deserialization errors)

How reliable is the message delivery?

The general rule is at-most-once delivery, i.e. no guaranteed delivery. Stronger reliability can be built on top, and Akka provides tools to do so.

How to send to a remote system?

Make sure that you have remoting enabled on both ends: client and server. Both do need hostname and port configured, and you will need to know the port of the server; the client can use an automatic port in most cases (i.e. configure port zero). If both systems are running on the same network host, their ports must be different

Why are replies not received from a remote actor?

The most common reason is that the local system’s name (i.e. the system@host:1234 part in the answer above) is not reachable from the remote system’s network location, e.g. because host was configured to be 0.0.0.0, localhost or a NAT’ed IP address.

If you are running an ActorSystem under a NAT or inside a docker container, make sure to set akka.remote.netty.tcp.hostname and akka.remote.netty.tcp.port to the address it is reachable at from other ActorSystems. If you need to bind your network interface to a different address – use akka.remote.netty.tcp.bind-hostname and akka.remote.netty.tcp.bind-port settings. Also make sure your network is configured to translate from the address your ActorSystem is reachable at to the address your ActorSystem network interface is bound to.

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Course Curriculam

Akka Course Module

Akka is an open-source toolkit and runtime simplifying the construction of concurrent and distributed applications on the JVM.

Akka supports multiple programming models for concurrency, but it emphasizes actor-based concurrency, with inspiration drawn from Erlang.

Language bindings exist for both Java and Scala. Akka is written in Scala and, as of Scala 2.10, Akka’s actor implementation is included as part of the Scala standard library

Duration: 45 Days

Support: 24×7

Video: Yes

AKKA Certified Professional