-
Talk setup Question
-
experience with Threads, CompleteableFutures, Reactor/RxJava
-
tell a story:
-
there was once upon a time a happy programmer
-
sequential code
-
multicore revolution broke out
-
fiddled with threads: and failed
-
fiddled with better concurrency abstraction: and kind of lived
-
but secretly he remembered the good old times
-
then Kotlin gave him Coroutines the ultimate weapon
-
the weapon was kind of invisible
-
he went to the battle field called production and exposed himself to a heavy request traffic salvo while his collegues were watching him from a save distance
-
and he succeeded
What is a coroutine?
- image processes/threads/coroutines -- run example
Key ingredients for coroutines
- Coroutine Builders
- suspend functions
- Coroutine Scope
- Coroutine Context
##Examples
- Get User
curl http://localhost:8080/users/1
- Insert User
curl -X POST -H "Content-Type: application/json" -d '{"id":null,"username":"JackRabbit","email":"Jack@Rabbit.com","avatarUrl":null}' http://localhost:8080/users/
- Sync avatar
curl -X PATCH http://localhost:8080/users/1/sync-avatar
##Perf tests See: https://github.com/parkghost/gohttpbench To build:
go build -v -o gob github.com/parkghost/gohttpbench
- Get Performance
gob -c 100 -n 500 -k http://localhost:8080/blocking/users/3/sync-avatar
- Post Performance
gob -c 100 -n 500 -T "application/json" -p user.json -k http://localhost:8080/blocking/users/
https://stackoverflow.com/questions/35628764/completablefuture-vs-spring-transactions