[ServerlessDays Zurich 2019] Solving complex business use cases in a serverless way

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Serverless computing gains popularity as it simplifies developers’ lives in many aspects: languages, deployment, infrastructure. But simplicity doesn’t mean inability to build complex workflows. In this talk, we shared our experience using Apache OpenWhisk to solve advanced business use cases.

Software

© 2019 Adobe. All Rights Reserved. Adobe Confidential.
Solving Complex Business Use Cases with Apache OpenWhisk
Duy Nguyen & Moritz Raho

© 2019 Adobe. All Rights Reserved.
() => “Something about us”
2
Adobe Research Basel
Duy Nguyen Moritz Raho

© 2019 Adobe. All Rights Reserved.
SET THE STORY
3 Photo courtesy of Zeno Slodki
ottawachamberorchestra.com

© 2019 Adobe. All Rights Reserved.
Serverless Platform @Adobe
4
• Adobe I/O Runtime
• Not general purpose
• Extend Adobe products

© 2019 Adobe. All Rights Reserved.
Behind I/O Runtime: Apache OpenWhisk (Incubator)
5
• Open Source, no vendor lock-in
• Polyglot and custom runtimes
• Production Ready - IBM

© 2019 Adobe. All Rights Reserved.
OpenWhisk Action: Hello world
6
f
// hello.js
function main (params) {
return `Hello ${params.name}`
}
$ wsk action create hello hello.js
$ wsk action invoke hello –p name ServerlessDays
{
“name”:
"ServerlessDays”
}
"Hello ServerlessDays"

© 2019 Adobe. All Rights Reserved.
Reality
7
f
f f
f
f
f
f
f

© 2019 Adobe. All Rights Reserved.
Combine Actions into a Meaningful Service
8
f
f f
f
f
f
f
f
Input Output

© 2019 Adobe. All Rights Reserved.
Slack Bot Example
9
f
f f
f
f
f
f
f
Slack event
parse
extract command
error
exec ..
Slack msg

© 2019 Adobe. All Rights Reserved.
But how to Combine Actions?
10
f
f f
f
f
f
f
f
Input Output
?

© 2019 Adobe. All Rights Reserved. 11
© [stokkete] / Adobe Stock

© 2019 Adobe. All Rights Reserved.
Combining Actions: an App Level Solution
12
Conductor Action
extract parse
Input Output
TIME

© 2019 Adobe. All Rights Reserved.
Combining Actions: an App Level Solution
13
Conductor Action
extract parse
Input Output
Driver action is waiting for results, you get billed twice!
TIME = $

© 2019 Adobe. All Rights Reserved. 14
© [Kirill Zdorov] / Adobe Stock

© 2019 Adobe. All Rights Reserved.
Combining Actions with OpenWhsik Conductor
15
extract parse
Input Output
TIME
CA CA CA
No double billing anymore

© 2019 Adobe. All Rights Reserved.
OpenWhisk Conductor Action
16
OpenWhisk takes care of invoking the actions
// conductor-action.js
function main(params) {
let step = params.$step || 0
delete params.$step
switch (step) {
case 0: return { action: ‘extract', params, state: { $step: 1 } }
case 1: return { action: ‘parse', params, state: { $step: 2 } }
case 2: return { params }
}
}

© 2019 Adobe. All Rights Reserved.
OpenWhisk Composer: Library built on top of Conductors
17
// composition.js
require('openwhisk-composer')
composer.sequence(‘extract’, ‘parse')
$ compose composition.js --deploy composed-action
Compiles to conductor, state transitions not needed

© 2019 Adobe. All Rights Reserved.
OpenWhisk Composer Combinators
18
if
Condition action
Action 1 Action 2
true false
parallel
Action 1 Action n[…]
try
Action
handler
error
Provides a programming model!
retain, async, map, mask, merge, retry …
Condition action
Action
true
while
false

© 2019 Adobe. All Rights Reserved.
Now what?
19
© [artifika] / Adobe Stock

© 2019 Adobe. All Rights Reserved.
Use Case
20

© 2019 Adobe. All Rights Reserved.
Check Image Quality
21
X
✓

© 2019 Adobe. All Rights Reserved.
Image Auto Cropping & Swatch Generation
22

© 2019 Adobe. All Rights Reserved.
Manual Image Processing
23

© 2019 Adobe. All Rights Reserved.
Automated Image Processing
24

© 2019 Adobe. All Rights Reserved.
Low Quality Images
25

© 2019 Adobe. All Rights Reserved.
High Level Design of the Serverless Workflow
26
Adobe CC Assets Adobe Experience Manager
{}
Quality check
trigger event
✓
X
Image processing
JPG PNGupload

© 2019 Adobe. All Rights Reserved.
Demo
27
© [christianchan] / Adobe Stock

© 2019 Adobe. All Rights Reserved.
Results
28
TODO
Human benefit:
Computing benefit: scaling up / down
© [wavebreak3] / Adobe Stock
© [Gorodenkoff] / Adobe Stock

© 2019 Adobe. All Rights Reserved.
Conductor says goodbye
29
© [AboutLife] / Adobe Stock

© 2019 Adobe. All Rights Reserved. Adobe Confidential.
Questions?
Duy Nguyen <dunguyen@adobe.com>; Moritz Raho <raho@adobe.com>

[ServerlessDays Zurich 2019] Solving complex business use cases in a serverless way

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6. © 2019 Adobe. All Rights Reserved. OpenWhisk Action: Hello world 6 f // hello.js function main (params) { return `Hello ${params.name}` } $ wsk action create hello hello.js $ wsk action invoke hello –p name ServerlessDays { “name”: "ServerlessDays” } "Hello ServerlessDays"

16. © 2019 Adobe. All Rights Reserved. OpenWhisk Conductor Action 16 OpenWhisk takes care of invoking the actions // conductor-action.js function main(params) { let step = params.$step || 0 delete params.$step switch (step) { case 0: return { action: ‘extract', params, state: { $step: 1 } } case 1: return { action: ‘parse', params, state: { $step: 2 } } case 2: return { params } } }

17. © 2019 Adobe. All Rights Reserved. OpenWhisk Composer: Library built on top of Conductors 17 // composition.js require('openwhisk-composer') composer.sequence(‘extract’, ‘parse') $ compose composition.js --deploy composed-action Compiles to conductor, state transitions not needed

18. © 2019 Adobe. All Rights Reserved. OpenWhisk Composer Combinators 18 if Condition action Action 1 Action 2 true false parallel Action 1 Action n[…] try Action handler error Provides a programming model! retain, async, map, mask, merge, retry … Condition action Action true while false

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