Going reactive : more scalability and resilience but … no faster !

running waitingrunning waiting running

Server

Thread pool

My threads are waiting… my server is down

Java NIO : The Foundation

aSync + unBlockingEvent Queue

Event

Event

Event

Worker Thread

Operation

Operation

Operation

EVENT

LOOP

Register call back

Call BackTrigger Event

Reactor Pattern

Server

Event Queue

Worker Thread

read

decode

compute

encode

send

Everything runs in parallel… except my code …

Reactive StreamReactive Streams is an initiative to provide a standard for asynchronous stream processing with non-blocking back pressure

http://www.reactive-streams.org

Source

Flow

Sink

Source

Flow

Sink

1 msg/s20 msg/s

Source

Flow

Sink

1 msg/s20 msg/s

Source

Flow

Sink

1 msg/s20 msg/sOutOfMemoryError

Back PressureSource

Flow

Sink

20 msg/s1 msg/s 1 msg/s

Stop and Wait

Source

Sink🍺

🍕

🍔

Partition Merge

Zip

Advanced features

Advanced features

Advanced features

Devoxx 2017: Univercity VertxDevoxx 2017: Reactive SpringLightbend Blog:

https://www.lightbend.com/blog/exploring-reactive-integrations-java8-akka-streams-alpakka-kafka

References