1. Liquid Stream Processing!
Across Web Browsers!
and Web Servers
Masiar Babazadeh!
@masiarb
Andrea Gallidabino!
@agallidabino
Cesare Pautasso!
@pautasso
University of Lugano
Switzerland
name.surname@usi.ch
1

2. Web Liquid Streams2

3. WebRTC
3

4. var k = require('wls.js');!
setInterval(function(){!
getTemperature(!
! ! ! function(temp, sensor_id){!
k.send({!
"temperature" : temp,!
"id" : sensor_id,!
! ! ! ! "ts" : new Date().getTime(),!
});!
! ! }!
! );!
}, 1000);
4

5. {!
topology : {!
id : “HAS_topology”,!
operators : [!
{!
id : “producer”,!
script : “pi_prod.js”,!
! ! ! ! ! constraints : [“temperature”],!
},!
…!
! ! ! ! ],!
! ! ! ! bindings : [!
! ! ! ! ! {!
! ! ! ! ! ! from : “producer”,!
! ! ! ! ! ! to : [“filter”, “web_consumer_1”]!
! ! ! ! ! ! type : “broadcast”!
! ! ! ! ! },!
! ! ! ! ! …!
! ! ! ! ]!
! ! }!
}!
5

6. 6
C
C
P
C
F

7. 7

8. 8
Filter Peers
Compute the ranking

9. F
CP
F C
9

10. F C
P
10

11. 11
F C
P
C

12. F
Operator Elasticity
12

13. 13
F
Fault Tolerance

14. FXF
14
C
C
P
C

15. 15

16. P F C
16

17. 17
P F C

18. F
18
1

19. 19
Every 10k msgs
Every 5k msgs
1
Disconnection

20. 20
2

21. 21
2

22. 22
2

23. 23

24. 2424

25. 25
WebRTC

26. 26
Thank you.
Liquid Stream Processing!
Across Web Browsers!
and Web Servers
Masiar Babazadeh!
@masiarb
Andrea Gallidabino!
@agallidabino
Cesare Pautasso!
@pautasso
name.surname@usi.ch