List/Grid Tag Archives: Akka

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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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Handle Every Event in Your Akka Application

Event here, event there, events flying everywhere. Post about checking that every Akka event will finally find its home. Akka and reactive, event-based applications are new approach ...
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Reactive Queue with Akka Reactive Streams

Reactive streams is a recently announced initiative to create a standard for asynchronous stream processing with built-in back-pressure, on the JVM. The working group is formed by companies ...
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Simplifying trading system with Akka

My colleagues are developing a trading system that processes quite heavy stream of incoming transactions. Each transaction covers one Instrument (think bond or stock) and has some (now) ...
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Akka Java for large-scale event processing

We are designing a large scale distributed event-driven system for real-time data replication across transactional databases. The data(messages) from the source system undergoes a ...
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Akka Toolkit 2.3 released

The release of 2.3.0 version of Akka toolkit was recently announced. Akka is a very useful toolkit and runtime for building highly concurrent, distributed, and fault tolerant event-driven ...
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Three flavours of request-response pattern in Akka

Imagine a simple Akka actor system consisting of two parties: MonitoringActor and NetworkActor. Whenever someone (client) sends CheckHealth to the former one it asks the latter by sending ...
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Sending Email with Java and Akka actors

Akka is a concurrent framework written by Scala. Here I demonstrate sample application to send emails with Akka and implemented in Java. Reasons I decided to use Akka framework other ...
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Future Composition with Scala and Akka

Scala is functional and object-oriented language, which runs on the JVM. For concurrent and/or parallel programming it is a suitable choice along with the Akka framework, which provides ...
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Managing congested actors in Akka

There comes a time in an Akka application when an actor can longer handle increasing load. Since each actor can only handle one message at a time and it keeps a backlog of pending messages ...
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