How LEGO.com Accelerates Innovation With Serverless

2. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
How LEGO.com accelerates
innovation with serverless
Sheen Brisals
AWS Serverless Hero
Senior Engineering Manager
The LEGO Group
Danilo Poccia
Chief Evangelist (EMEA)
AWS
S V S 3 0 2

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Last year at re:Invent
Accelerating with AWS Step Functions
Accelerating with Amazon EventBridge
Serverless team growth
Business value acceleration
Agenda

4. Last year at re:Invent
© 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.
The serverlessjourney of
shop.LEGO.com
S V S 3 2 0
Sheen Brisals
Senior Application Engineer
The LEGO Group
Danilo Poccia
Principal Evangelist
Amazon Web Services
Pattern – Codelessdata ingestion
Kinesis
Data Firehose
API
Gateway
S3
bucket
Event
producer
• API to stream directly
• Less point of failures
• Native integration
• Less compute costs
• Less code to maintain
• Fully managed and scalable
Transformation
and validation
Backup
Fan-out
function
Processing
functions
Trigger
Async
Errors
Pattern – Hub-and-spoke event bus
{
"version": "0",
"id": "6a7e8feb-b491-4cf7-a9f1-bf3703467718",
"detail-type": "State change Notification",
"source": "service-order-submit-dev",
"account": "123456789012",
"time": "2019-08-29T12:10:21Z",
"region": "eu-central-1",
"resources": ["arn:aws:events:event-bus/checkout-bus"],
"detail": {
"event": {
"meta_data": {
"site_id": "LEGO Shop",
"type": "CHECKOUT",
"subtype": "ORDER",
"status": "COMPLETE"
},
"data": {
"order_number": "T123456789",
"customer_id": "bf3703467718-29T12-6a7e8feb"
}
}
}
}
Standard syntax
across multiple
services
Custom for each
service

5. Accelerating
with serverless

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Accelerating with
AWS Step Functions

7. Catalog feed generation in parallel
U S I N G D Y N A M I C P A R A L L E L I S M
Timer Process Product
catalogs
Publish
Social
media

8. Dynamic parallelism
AWS Step
Functions
Trigger
rule
Amazon CloudWatch
Events

9. Dynamic parallelism
{
"CreateFeedsForCountries": {
"Type": "Map",
"ItemsPath": "$.countryList",
"MaxConcurrency": 5,
"Iterator": {
"StartAt": "CreateCountryFeed",
"States": {
"CreateCountryFeed": {
"Type": "Task",
"Resource": “feed-create",
"End": true
}
}
}
}
}

10. Failure message replay with state machine
Recommendations
engine
Product
feeds
Failed
product feeds
Check
status
Process
failed feeds

11. Failure
event
Failed feeds
DLQ
Failure message replay with state machine
Product
recommendation
feed generator
Product feed
store
Product feed
dispatcher
Recommendations
API
Alarm channel
notifier
Resumption
event
Failure
event
Failure
messages
Resumption
event
Reprocess failed feeds
(AWS Step Functions)
Service state
Event bus
(Amazon EventBridge)

12. In a way, this is implementing the
circuit breaker pattern using AWS
Step Functions
Failure message replay with state machine

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Accelerating with
Amazon EventBridge

14. Back-in-stock notification
Email store
LEGO.com Notify customer Stock checker
Customer

15. Back-in-stock notification
Email
registration
Product
status check
Customer
notification
Email
dispatch
Email
feedback
Business
insights
Registration
request
Registration
response
Registration
request
Registration
response
Product
status
Product
available
Amazon
SES
Email
feedback
events
Email
feedback
events
Status events
Amazon
EventBridge

16. Choreographing back-in-stock notification
A D V A N T A G E S O F C H O R E O G R A P H Y V S . O R C H E S T R A T I O N
Registration
request
Registration
API
Registration
request
Product status
check
Product
available
Product
available
Notification
orchestrator
Fetch emails
Email dispatch
queue
Email
dispatcher
Feedback
events
Feedback
events
Request
handler
Store
registrations
Amazon
SES
Email store Amazon
EventBridge

17. Choreographing back-in-stock notification
Registration
request
Registration
API
Email store
Registration
request
Product status
check
Product
available
Product
available
Notification
orchestrator
Fetch emails
Email dispatch
queue
Email
dispatcher
Feedback
events
Feedback
events
Amazon
SES
Amazon
EventBridge

18. Orchestrating the notification process
Product
available

19. Email feedback event stream with batching
Amazon
SES
Amazon S3
bucket
Amazon Kinesis
Data Firehose
AWS Lambda
function
Feedback
event
Buffering
events
Storing
events
Grouping
events
Amazon EventBridge
event bus
Batched
feedback
event
Success
events
Error
events
Reject, Bounce, Complaint,
Send, Open, Click
Event with an
array of custom
data
Business
insights
Error
feedback
handling
A single EventBridge event contains multiple feedback events

20. Email feedback event stream with batching
Amazon
SES
S3 bucket
Kinesis
Data Firehose
Lambda
function
Buffering
events
Storing
events
Business
insights
Error
feedback
handling
Success
events
Error
events
Efficient data ingestion pattern
Patterns help to accelerate your serverless adoption
Batched
feedback
event
Feedback
event
Grouping
events
EventBridge
event bus

21. https://bit.ly/2FZ1b1a

22. Order placement flow
Checkout
Submit
order
Payment
Authorize
payment
Order
Process
order
Order
submitted
Order
submitted
Order
canceled
Payment
authorized
Payment
canceled
Payment
authorized
Order
confirmed
Order
canceled
Order
confirmed
Shipping
Orders
to SAP
Amazon
EventBridge

23. Orchestration inside order processing

24. • Use choreography to coordinate different microservices
▪ For example, with Amazon EventBridge
• Use orchestration inside microservices, or across different
microservices if you need a distributed transaction
▪ For example, using AWS Step Functions
Choreography vs. orchestration

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Serverless team growth

26. Start of our serverless journey
Serverless team Front-end team
• Small focus team
• Build skills and expertise
• Expand incrementally

27. Feature-driven and full-stack squads
payments
rewards platform
content
insights
new
products checkout
• Feature squads
• Full stack
• Distributed skills

28. • Feature squads with growing serverless knowledge
• Engineers become architecture-aware
• Engineers are part of the DevOps process
• Adapting best practices, including Serverless Lens
• Service ownership – we build, we run!
• Sharing knowledge with the community

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Business value acceleration

30. Scalability gives business value too

31. • Faster feature development
• Stakeholder trust in delivering value
• Increased operational visibility
• Scalable, serverless platform that serves more customers
Business value acceleration

32. Thank you!
© 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Sheen Brisals
Twitter @sheenbrisals
Danilo Poccia
Twitter @danilop

33. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.