1.
Flight of the Flux
Simon Basl�, Reactor Staff Software Engineer at Pivotal
@simonbasle
a look at Reactor's execution model

2.
What we'll learn

3.
Nothing happens
until you subscribe,
Assembly time vs
Execution time

4.
Nothing happens
until you subscribe,
Assembly time vs Execution time
Cold or Hot?

5.
Nothing happens
until you subscribe,
Assembly time vs Execution time
Cold or Hot?
Concurrent
agnostic

6.
Cold or Hot?
Concurrent
agnostic
Schedulers,
PublishOn vs
SubscribeOn
Nothing happens
until you subscribe,
Assembly time vs Execution time

7.
Cold or Hot?
Concurrent
agnostic
Schedulers,
PublishOn vs
SubscribeOn
Work Stealing
Nothing happens
until you subscribe,
Assembly time vs Execution time

8.
Cold or Hot?
Concurrent
agnostic
Schedulers,
PublishOn vs
SubscribeOn
Work Stealing
Operator Fusion
Nothing happens
until you subscribe,
Assembly time vs Execution time

9.
Cold or Hot?
Concurrent
agnostic
Schedulers,
PublishOn vs
SubscribeOn
Work Stealing
Operator Fusion
Nothing happens
until you subscribe,
Assembly time vs Execution time

10.
Unless otherwise indicated, these slides are � 2013 -2018 Pivotal Software, Inc. and licensed under a Creative Commons
Attribution-NonCommercial license: http://creativecommons.org/licenses/by -nc/3.0/
Disclaimer

11.
Unless otherwise indicated, these slides are � 2013 -2018 Pivotal Software, Inc. and licensed under a Creative Commons
Attribution-NonCommercial license: http://creativecommons.org/licenses/by -nc/3.0/
This is a condensed version of a 50min talk
We'll go fast, skip over Reactor basics and do some live coding instead :)
12

12.
Unless otherwise indicated, these slides are � 2013 -2018 Pivotal Software, Inc. and licensed under a Creative Commons
Attribution-NonCommercial license: http://creativecommons.org/licenses/by -nc/3.0/
Live Coding

13.
Unless otherwise indicated, these slides are � 2013 -2018 Pivotal Software, Inc. and licensed under a Creative Commons
Attribution-NonCommercial license: http://creativecommons.org/licenses/by -nc/3.0/
Work Stealing

14.
so where do (most) operators run, again?

15.
publishOn

16.
what is work stealing?

17.
1 operator that
combines data coming
from 2 threads

18.
shared
queue,
drain loop

19.
offer

20.
offer
work

21.
offer
offer
work

22.
offer
offer
work
steal
exit

23.
offer
offer
work
steal
exit
work

24.
offer
offer
work
steal
exit
work
exit

25.
Unless otherwise indicated, these slides are � 2013 -2018 Pivotal Software, Inc. and licensed under a Creative Commons
Attribution-NonCommercial license: http://creativecommons.org/licenses/by -nc/3.0/
Operator Fusion

26.
macro fusion

27.
a.then(b).then(c).then(d)

28.
a.then(b,c,d)

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micro fusion

30.
a.map(->).map(->).filter(->)

31.
a.map(->).map(->).filter(->)

32.
a.map(->).map(->).filter(->)
bounded queues (for backpressure)

33.
a.map(->).map(->).filter(->)

34.
a.map(->).map(->).filter(->)
single transverse bounded queue

35.
Thanks !
@simonbasl
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Questions?

36.
> Stay Connected.
Join the community in our Gitter channel: reactor/reactor
Enjoy the rest of the conference!
#springon
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@s1
p