Summary Akka in Action is a comprehensive tutorial on building message-oriented systems using Akka. The book takes a hands-on approach, where each new concept is followed by an example that shows you how it works, how to implement the code, and how to (unit) test it. Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications. About the Technology Akka makes it relatively easy to build applications in the cloud or on devices with many cores that efficiently use the full capacity of the computing power available. It's a toolkit that provides an actor programming model, a runtime, and required support tools for building scalable applications. About the Book Akka in Action shows you how to build message-oriented systems with Akka. This comprehensive, hands-on tutorial introduces each concept with a working example. You'll start with the big picture of how Akka works, and then quickly build and deploy a fully functional REST service out of actors. You'll explore test-driven development and deploying and scaling fault-tolerant systems. After mastering the basics, you'll discover how to model immutable messages, implement domain models, and apply techniques like event sourcing and CQRS. You'l also find a tutorial on building streaming applications using akka-stream and akka-http. Finally, you'l get practical advice on how to customize and extend your Akka system. What's Inside Getting concurrency right Testing and performance tuning Clustered and cloud-based applications Covers Akka version 2.4 About the Reader This book assumes that you're comfortable with Java and Scala. No prior experience with Akka required. About the Authors A software craftsman and architect, Raymond Roestenburg is an Akka committer. Rob Bakker specializes in concurrent back-end systems and systems integration. Rob Williams has more than 20 years of product development experience. Table of Contents Introducing Akka Up and running Test-driven development with actors Fault tolerance Futures Your first distributed Akka app Configuration, logging, and deployment Structural patterns for actors Routing messages Message channels Finite-state machines and agents System integration Streaming Clustering Actor persistence Performance tips Looking ahead
4. Typed Actors; What are typed actors?; Defining an actor; Creating actors; An actor with a default constructor; An actor with a non-default constructor; Messaging model; Sending messages; Fire and forget messages; Send and receive messages; Stopping actors; Actor lifecycle monitoring; Lifecycle callbacks; Receiving messages; Supervisor strategy; Creating an actor hierarchy; Dispatchers and routers; Using dispatchers; application.conf; Using routers; Summary; 5. Dispatchers and Routers; Dispatchers; Dispatcher as a pattern; Executor in Java; Dispatchers in Akka; Types of dispatcher.
Offers a tutorial to the Scala programming language, describing how to use the open source libraries for both Java and Scala, how to build DSLs and other productivity tools,and ways to debug and test using ScalaTest.
This concise Pali-English Dictionary has been prepared mainly for use by students in schools and colleges. The author is not only eminent Elder of the Buddhist Order but one of the leading Pali scholars recognized both in the East and the West as an authority on the subject. It is to be observed that the author has kept more or less to the traditional sense of words while not althogether ignoring the meanings given by Western scholars in their translations and lexicons. Many errors in thelatter sources have also been rectified. But the basic sense adopted is in nearly every instance the traditionally accepted meaning in accord with the commentaries and the glossaries. This perhaps is of special value to beginners as thereby they get introduced to the indigenous tradition, thus providing a useful basis on which to build up a more scientific knowledge as the study advances.