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Otavio Santana
@otaviojava
NoSQL design pitfalls
with Java
member of KI group
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Otavio Santana
@otaviojava
Staff Engineer
● Java Champion
● JCP-EC-EG-EGL
● Apache Committer
● Eclipse Committer
● Eclipse Project Leader
● Book and blog writer
Speaker
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What it is not!
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● “New research shows 75% of ‘open’ Redis servers infected”
● The Twelve Factor App
NoSecurity
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● Schemaless
● Validation
No Data integrity
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● Complexity
● Maintain
No Responsibility
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● The right questions
● Horizontal vs Vertical
● Write vs Read
Scalability??
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● Benchmark
● CAP theorem
No-mistake
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● CAP theorem
● Backup
No-Trade-off
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● SQL
● NewSQL
● NoSQL
No-single-solution
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Model
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● Key
● Biggest mistakes
● View
Modeling
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No content
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What Apache Cassandra is not
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● Big Data
● Rich Query
● Relational
Cassandra
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● Key
○ Partition Key
○ Clustering Key
● Secondary Key
● Allow Filtering
Queries
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● List
● Map
● Tuple
● UDT
Cassandra Powers
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● Load Balancer
● Consistency Level ALL
● Backup
Troy
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Sample
@Entity
public class Contact {
@Id
private String name;
@Column
private LocalDate birthday;
@Column
private Map details;
}
● Map
● UDT
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Sample @Entity
class Car {
@Id
private String plate;
@Column
private String city;
@Column
private String color;
@UDT("owner")
@Column
private Owner owner;
}
● UDT
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Sample
@Entity
public class Recipe {
@Id
private String name;
@Column
private String city;
@Column
@UDT("ingredient")
private Set ingredients;
}
● Set
● UDT
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MongoDB
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● Transaction
● ACID
What MongoDB is not
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“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
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● Coherence
● Independence
● Isolation
DDD - Elemar Jr
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● Self Sufficient
● Business
Coherence
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● Exist
● It does not need anyone
Independence
La liberté guidant le people (1830)
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● Cannot impact another entity
Isolation
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● Entity
● Aggregate
● Value Object
Sample @Entity
public class Order {
@Id
private ObjectId id;
@Column
private LocalDateTime orderedAt;
@Column
private List items;
@Column
private Address shipTo;
}
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Cloud
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● Containers
● Mutable
● Kubernetes
● Services
Cloud
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● Bean Validation
● ORM
● Reactive programming
● Impedance
Java Frameworks
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© xgeeks | 02/12/2020 33
Demo Time
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xgeeks is changing the game
in making things happen –
giving on-demand capacity
and bringing expertise filling
skill gaps
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What makes us strong
We are bringing passion and eXpertise into the team.
High Coding standards
Reliable and proven processes
and quality testing
Continuous Innovation
Senior/Junior split 1:2 enables
room for innovation
Integration in KI group
Strong backing and steady
exchange with experts
Flexible work style
Individual and flexible, fully
acustomed to our clients
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Thank you
Otávio Santana
Staff Engineer, Xgeeks
Join us!!
http://xgeeks.io/
@xgeeksio