00052680 - A Detecting Method for Active-Reactive- Negative-Sequence Powers and Its Application
Reactive application
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Reactive Application Christophe Marchal Rafael Souza @toff63 @rafael_psouza
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Talk about Functional application and Reactive application with example of Scala Future, Akka actors and a chat using the latest play framework version
Transcript of Reactive application
Reactive Application
Christophe Marchal Rafael Souza@toff63 @rafael_psouza
Object Oriented ProgrammingHard to reuse objects
Functional ProgrammingEasy to reuse small functions
Functional Paradigm: Composition
“In modern applications involving highly concurrent computing on multicore machines, state is the problem”
Functional programming: A step backward - infoworld.com
Functional Paradigm: Stateless
Tools for application development
Evolution of large applications
Response Time
Uptime
Data Size
Hosting
“reacting to events or situations rather than acting first to change or prevent something”
Cambridge
“Showing a response to a stimulus” Oxford
What Reactive means?
Reactive traits
Scaling up
Scaling out
Concurrency handled by container
More user, more thread
Efficiency issue
Thread dump result
Computer time scale
Paradigm shift: Event driven
Scala Future
Handling failure
Traditional Failure Handling
Node stop responding
Domino effect
Bulkhead pattern
● Stateful
● Asynchronous
● Only communicate through message
Create Bulk: Actors
Actor tree
Akka: Supervision
Akka: Supervision
Streaming data to the screen
Websocket
Controller
Backend Actor
Thanks!Obrigado!
Christophe Marchal Rafael Souza@toff63 @rafael_psouza
