Talk at Developer Cloud Week

1. Unlock Cassandra Data
for Application Developers
using GraphQL and
REST Apis with

2. ➢ Training
➢ Teaching
➢ Reference Applications
➢ Developers Support
➢ Public Speaking
➢ Creator of ff4j (ff4j.org)
➢ Maintainer for 8 years+
@clunven
➢ Happy developer for 14 years
➢ Spring Petclinic Reactive & Starters
➢ Implementing APIs for 8 years
@clun
Cédrick Lunven
Director Developer Relations

3. Datastax Developers Advocates Team
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David
Gilardi
Jack
Fryer
Aleksandr
Volochnev
Cedrick
Lunven
Stefano
Lottini
Ryan
Welford
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Rags
Srinivas
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Kirsten
Hunter
Sonia
Siganporia
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4. 4
Stargate Data gateway
What and Why
02
Document-Oriented API
and Schemaless
04
01
GraphQL
The new frontier
05
Apache Cassandra™
Use Cases
Agenda (25 min)
4
REST in Peace
03
SDK +
What’s NEXT ?
06

5. Stargate Data gateway
What and Why
02
Document-Oriented API
and Schemaless
04
01
GraphQL
The new frontier
05
Apache Cassandra™
Use Cases
Agenda
5
REST in Peace
03
SDK +
What’s NEXT ?
06

6. NODE
NODE
NODE
NODE
NODE NODE
NODE
ApacheCassandra™
1 Installation = 1 NODE
✔ Capacity = ~ 2-4TB
✔ Throughput = LOTS Tx/sec/core
Communication:
✔ Gossiping
✔ Masterless
DataCenter | Ring
= NoSQL Distributed Database

7. ApacheCassandra™ Linear Scalability

8. ApacheCassandra™ Big Names

9. Replication
Factor (RF)
0
50
33
17
83
67
Data is distributed (sharded) and replicated
Token
Range

10. Geographic Distribution (DDN) Hybrid-Cloud and Multi-Cloud
Node, Rings and clusters distributed
On-premise

11. High Throughput
High Volume
Heavy Writes
Heavy Reads
Event Streaming Log Analytics
Internet of Things Other Time Series
Mission-Critical
No Data Loss
Always-on
Scalability
Availability
Distributed
Cloud-native
Caching Pricing
Market Data Inventory
Banking Retail
Tracking /
Logistics
Customer
Experience
Containers Hybrid-cloud
Kubernetes Multi-cloud
Modern Cloud
Applications
Global Presence
Workload Mobility
Compliance /
GDPR
ApacheCassandra™: Use Cases

12. Apache Cassandra ™ 4.0 is there

13. Stargate Data gateway
What and Why
02
Document-Oriented API
and Schemaless
04
01
GraphQL
The new frontier
05
Apache Cassandra™
Use Cases
Agenda
13
REST in Peace
03
SDK +
What’s NEXT ?
06

14. Data Gateway Rational
Ubiquitous, API-based Consumption
MICROSERVICES
DEVELOPERS
Developers want the option
to use modern APIs and
development gateways.
Cassandra is a database
designed for the new
standard and the associated
APIs that facilitate the first
choice of developers.

15. Stargate.io

16. Stargate Overview
An open source API framework for data
Stargate makes it easy to use a
database for any application workload
by adding plugin support for new APIs,
data types, and access methods
MICROSERVICES
DEVELOPERS

17. API Extensions and Persistence Extensions
API
EXTENSIONS
PERSISTENCE
EXTENSIONS
Authentication

18. gRPC
(beta)
CQL
GraphQL Document
API
Data
API
Cassandra
3.x
Cassandra
4.x
Cassandra
DSE 6.x
API Extensions and Persistence Extensions

19. /graphql/<ks>
http(s) /rest
Data Service Doc Service CQL-First Service
swagger-ui
/graphql-schema /graphql-admin
/playground
Schema-first Service
Persistence Service
/auth
Metrics
Service
8080
8081 8082
8090
9042
OSGI
Services
Registry
C* 3.x C* 4.x
C* 3.11
storage shim
C* 4.x
storage shim
DSE 6.x
storage shim
DSE 6.x
Document
Shredding Service
Rate limiting
Service
8084
Data + Document APIs GraphQL APIs
cql
Service
Authentication
Service
gRPC
Service

20. Connecting to your cluster (Before)
NODE
NODE
NODE
NODE
NODE NODE
NODE
developers
Apps
Drivers
CQL
CQL
CQL
CQL
CQL
CQL
CQL

21. Connecting to your cluster (with Stargate)
NODE
NODE
NODE
NODE
NODE NODE
NODE
developers
Apps
Drivers
CQL
CQL
CQL
CQL
CQL
CQL
CQL
Stargate
CQL

22. Stargate
Stargate
Connecting to your cluster (with Stargate)
NODE
NODE
NODE
NODE
NODE NODE
NODE
developers
Apps
Drivers
CQL
CQL
CQL
CQL
CQL
CQL
CQL
Stargate
CQL

23. Stargate Data gateway
What and Why
02
Document-Oriented API
and Schemaless
04
01
GraphQL
The new frontier
05
Apache Cassandra™
Use Cases
Agenda
23
REST in Peace
03
SDK +
What’s NEXT ?
06

24. REST Api exposes a Swagger Interface
DDL
DML

25. Stargate Data gateway
What and Why
02
Document-Oriented API
and Schemaless
04
01
GraphQL
The new frontier
05
Apache Cassandra™
Use Cases
Agenda
25
REST in Peace
03
SDK +
What’s NEXT ?
06

26. Cassandra as Document Store
• Cassandra already handles JSON and structures
● INSERT JSON, SELECT JSON
● Set<>, List<>,Map<>, and User Defined type (UDT) even nested
● BUT everything is strongly coupled with a VALIDATION
• You want to insert and retrieve any JSON documents efficiently
● Allow “schemaless”
● Write to a single document is a single batch of statements
● Read from a single document is a single SELECT statement.
● Limit Tombstones with range deletes

27. Document API

28. Document Shredding
28

29. Document Shredding
29

30. Document Shredding
30

31. Stargate Data gateway
What and Why
02
Document-Oriented API
and Schemaless
04
01
GraphQL
The new frontier
05
Apache Cassandra™
Use Cases
Agenda
31
REST in Peace
03
SDK +
What’s NEXT ?
06

32. GraphQL “CQL First”

33. GraphQL “CQL First”

34. GraphQL “Schema First”

35. GraphQL “Schema First“

36. GraphQL “Schema First“

37. GraphQL Federation
https://stargate.io/docs/stargate/1.0/developers-guide/apollo-federation.html

38. Stargate Data gateway
What and Why
02
Document-Oriented API
and Schemaless
04
01
GraphQL
The new frontier
05
Apache Cassandra™
Use Cases
Agenda
38
REST in Peace
03
SDK +
What’s NEXT ?
06

39. SDK Wraps the API for a simplified usage
https://github.com/datastax/astra-sdk-java/wiki

40. c
Apache Cassandra
OSS Stargate.io
Gateway
Swagger UI GraphQL Playground Tools
Interface Utilisateur
Outils Web

41. Demos
https://github.com/datastaxdevs/confe
rence-2020-dataconla-stargate
https://github.com/datastaxdevs/conference
-apidays2021-stargate

42. Des Lives chaque semaine
https://www.datastax.com/workshops

43. Viendez sur Discord c’est cool
The Fellowship of the RINGS
https://bit.ly/cassandra-workshop

44. Thank you!
@clun
@clunven