Non-relational databases have come with the promise of assisting software in the Big Data age, handling the challenges of variety, velocity, and volume that come with it. However, several points plague even the most experienced software architects: How do I migrate my data to NoSQL and which one? Where are the relationships? Should I use some ORM? The purpose of this talk is to answer all of these questions and provide some essential tips so that your NoSQL experience is not a disaster.

1. Otavio Santana
@otaviojava
NoSQL design
pitfalls with Java

2. Otavio Santana
@otaviojava
DevRel Engineer
+ Java Champion
+ JCP-EC-EG-EGL
+ Apache Committer
+ Eclipse Committer
+ Eclipse Project Leader
+ Book and blog writer
Speaker

3. What it is not!

4. ● “New research shows 75% of ‘open’ Redis servers infected”
● The Twelve Factor App
NoSecurity

5. ● Schemaless
● Validation
No Data integrity

6. ● Complexity
● Maintain
No Responsibility

7. ● The right questions
● Horizontal vs Vertical
● Write vs Read
Scalability??

8. ● Benchmark
● CAP theorem
No-mistake

9. ● CAP theorem
● Backup
No-Trade-off

10. ● SQL
● NewSQL
● NoSQL
No-single-solution

11. Model

12. ● Key
● Biggest mistakes
● View
Modeling

14. What Apache Cassandra is not

15. ● Big Data
● Rich Query
● Relational
Cassandra

16. ● Key
○ Partition Key
○ Clustering Key
● Secondary Key
● Allow Filtering
Queries

17. ● List
● Map
● Tuple
● UDT
Cassandra Powers

18. ● Load Balancer
● Consistency Level ALL
● Backup
Troy

19. Sample
@Entity
public class Contact {
@Id
private String name;
@Column
private LocalDate birthday;
@Column
private Map<String, String> details;
}
● Map
● UDT

20. Sample @Entity
class Car {
@Id
private String plate;
@Column
private String city;
@Column
private String color;
@UDT("owner")
@Column
private Owner owner;
}
● UDT

21. Sample
@Entity
public class Recipe {
@Id
private String name;
@Column
private String city;
@Column
@UDT("ingredient")
private Set<Ingredient> ingredients;
}
● Set
● UDT

22. MongoDB

23. ● Transaction
● ACID
What MongoDB is not

24. “In a relational database, we usually model the schema at
the very beginning of the project. Why is this so bad?
Because the beginning of the project is exactly the
moment that we know least about it”
Oren Eini - Modeling in a
Non Relational World

25. ● Coherence
● Independence
● Isolation
DDD - Elemar Jr

26. ● Self Sufficient
● Business
Coherence

27. ● Exist
● It does not need anyone
Independence
La liberté guidant le people (1830)

28. ● Cannot impact another entity
Isolation

29. ● Entity
● Aggregate
● Value Object
Sample @Entity
public class Order {
@Id
private ObjectId id;
@Column
private LocalDateTime orderedAt;
@Column
private List<Product> items;
@Column
private Address shipTo;
}

30. Cloud

31. ● Containers
● Mutable
● Kubernetes
● Services
Cloud

32. ● Bean Validation
● ORM
● Reactive programming
● Impedance
Java Frameworks

33. Demo Time

34. Platform.sh

35. We live in a cloud economy
Use cloud ready
SaaS services
Complexity
Cost
Risk
High
Med - High
Low
Migrate existing
workloads into
cloud
Build new apps
cloud ready
Degrees of risk around
enterprise cloud consumption...
^
^

36. We’re a polyglot, multicloud PaaS, with
continuous deployment built in.
At Platform.sh we believe your code
should just run. Monoliths?
Microservices? Stateful? Stateless?
Develop and deliver them all with
consistent tools.
Much more than
hosting

37. Infrastructure as
code
Add MySQL, PostgreSQL, MongoDB, Kafka,
Elasticsearch, Solr, Redis, RabbitMQ, or
InfluxDB to your project with a few lines of
code. Infrastructure changes are versioned
and auditable.
Service updates and security?
That’s on us. No more effort wasted on
patching your fleet.

38. Application
name: app
type: "java:11"
disk: 1024
hooks:
build: mvn clean package
relationships:
database: "db:postgresql"
web:
commands:
start: java -jar $JAVA_OPTS $CREDENTIAL file.jar

39. Services
database1:
type: mysql:10.1
disk: 2048
database2:
type: postgresql:9.6
disk: 1024

40. Route
"https://{default}/":
type: upstream
upstream: "app:http"
"https://www.{default}/":
type: redirect
to: "https://{default}/"

41. Platform.sh provides
an end-to-end PaaS
to build, run, and maintain
polyglot fleets of digital
experience applications
Developers can then focus on what matters
to the organization: shipping great web apps
and sites
Container Orchestration
Infrastructure
Continuous Deployment
Data Services
App Runtimes
Routing + Edge Security
Continuous Integration
Application Code
Application Data
Provisioning APIs, Integrations, Template Libraries
Web Console
…
Source Operations™

42. 1000s
e-commerce, life sciences, government, education,
media & entertainment, and high-tech customers
$47m
invested by top-tier international partners
Platform.sh at
a glance

43. Q&A Thank you!
Otavio Santana
DevRel Engineer, Platform.sh
@otaviojava