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JavaFest. Cedrick Lunven. Build APIS with SpringBoot - REST, GRPC, GRAPHQL which one should you pick?

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The document outlines a presentation by Cedrick Lunven on building APIs with Spring Boot, specifically focusing on REST, gRPC, and GraphQL. It covers key concepts such as microservices architecture, data modeling with Apache Cassandra, and best practices for API design and implementation. The session also includes a decision tree for selecting the appropriate API type based on project requirements.

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switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Cedrick Lunven | Director of Developer Advocacy #DataStax @clunven Build APIS with SpringBoot REST, GRPC, GRAPHQL Which one should you pick?
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 About me: Cedrick Lunven Director of Developer Advocacy Creator and Maintainer of FF4j Java and Spring Dinosaur
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Agenda 50min 2 3 DEMO and Code Browse Data Model & Persistence with Apache Cassandra 1 Anatomy of a Spring Boot Micro service 4 Decision tree 5 Take my code and slides + Q&A
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NEW PROFESSIONAL JAVA EVENT MAY 30th, 2020 KYIV, UKRAINE Cedrick Lunven | Director of Developer Advocacy #DataStax @clunven Anatomy of a Spring Boot Microservice 1
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Monolithic Business Logic User Interface Data Interface Multichannel UI Mobile UI Web ESB SOA Specialization BUS S1 S2 S3 Sn RDBMS noSQL DataLake Micro Frontend All Things Distributed Web Components SPA Native BFF (Backend for Frontend) Micro Services Data Mesh Api Gateway Service Discovery RDBMS Graph Hadoop Document KV newSQLColumn TSDB Distributed Tracing Containerization Layers Business Logic (Services) User Interface Data Interface (Dao) Backend Front-end OLTP OLAP RDBMS Microservices Architectures
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Building a Spring Boot Microservice Exposition Layer Service Layer Persistence Layer Database Data Model Configuration Monitoring Security Access Patterns Volume Throughput Latency Security (Service, Component) (Controllers) (Dao, Repository)
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 « Vanilla » So easy…. Exposition Layer Service Layer Persistence Layer Database Microservice (Service, Component) (Controllers) (Dao, Repository) 1 Normalized Data Model 2 CRUD
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 « Vanilla » So easy…. Exposition Layer Service Layer Persistence Layer Database Microservice (Service, Component) (Controllers) (Dao, Repository) DATA DATA-REST WEB MVC Configuration Monitoring Security Database Driver
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Entity => Spring-Data => Spring-Data-REST @Entity public class Customer { @Id @GeneratedValue(strategy=GenerationType.AUTO) private Long id; private String firstName; private String lastName; private Customer() {} private Customer( String firstName, String lastName) { this.firstName = firstName; this.lastName = lastName; } @RepositoryRestResource( collectionResourceRel = "customers", path = "customers") public interface CustomerRepository extends CrudRepository<Customer, Long> { List<Customer> findByLastName(String lastName); Customer findById(long id); }
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 When volumes grow ? Exposition Layer Service Layer Persistence Layer Database Microservice (Service, Component) (Controllers) (Dao, Repository) CREATE INDEX JOIN SHARDING … 3 CUSTOM QUERIES
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 CAP Theorem for Distributed Systems Consistency Availability Partition Tolerance ?
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NEW PROFESSIONAL JAVA EVENT MAY 30th, 2020 KYIV, UKRAINE Cedrick Lunven | Director of Developer Advocacy #DataStax @clunven Persistence Layer and Data Model with Apache Cassandra™ 2
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NODE NODE NODE NODE NODE NODE NODE Apache Cassandra™ 1 Installation = 1 NODE ü Capacity: ± 1TB ü Throughput: 3000 Tx/sec/core Communication: ü Gossiping DataCenter | Ring = Distributed NoSQL Database
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Scales Linearly • Need more capacity? • Need more throughput? • Add nodes!
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Data is Distributed Country City Habitant USA New York 8.000.000 USA Los Angeles 4.000.000 FR Paris 2.230.000 DE Berlin 3.350.000 UK London 9.200.000 AU Sydney 4.900.000 FR Toulouse 1.100.000 JP Tokyo 37.430.000 IN Mumbai 20.200.000 DE Nuremberg 500.000 CA Montreal 4.200.000 CA Toronto 6.200.000 Partition Key
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Data is replicated 59 (data) RF = 3 0 50 33 1783 67
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Data is replicated RF = 3 0 50 33 1783 67 59 (data)59 (data)
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Data is replicated RF = 3 0 50 33 1783 67 59 (data) 59 (data) 59 (data)
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Self Healing RF = 3 0 50 33 1783 67 59 (data)59 (data)
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Self Healing RF = 3 0 50 33 1783 67 59 (data) 59 (data) 59 (data) Hint
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Self Healing RF = 3 0 50 33 1783 67 59 (data) 59 (data) 59 (data) Hint
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Self Healing RF = 3 0 50 33 1783 67 59 (data) 59 (data) 59 (data)
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Use Cases High Throughput High Volume Mission Critical Availability Realtime Distributed Heavy Writes Heavy Reads Event Streaming Internet of Things Log Analytics Any TimeSeries Caching Market Data Prices No Data Loss Reponsive System Any CRUD API Layer Geograhically DeploymentsD R A S Banking Track and Trace Customer Apps Enterprise Data Layer Applications Global Company Retailers Hybrid Cloud MultiCloud ?
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Apache Cassandra MicroServices • REALTIME REQUESTS & SCALABILITY AT CORE • DISTRIBUTED ARCHITECTURES – From ACID to BASE (Basic Availability, Soft-State, Eventual Consistency) – Implementations: CQRS, Event Sourcing – Colocate service and Data • DECOUPLING BY DESIGN – 1 KEYSPACE = DOMAIN – 1 QUERY = 1 TABLE
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Reference Application http://killrvideo.github.io
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Data Model Design Entities & Relationships Queries
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Conceptual Data Model
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Application Workflow R1: Find comments related to target video using its identifier • Get most recent first • Implement Paging R2: Find comments related to target user using its identifier • Get most recent first • Implement Paging R3: Implement CRUD operations
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Mapping Q2: Find comments posted for a user with a known id (show most recent first) comments_by_video comments_by_user Q1: Find comments for a video with a known id (show most recent first) Q3: CRUD Operations
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Logical Data Model userid creationdate commentid videoid comment comments_by_user K C ↑ videoid creationdate commentid userid comment comments_by_video C ↑ K C ↑ ↑C
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Physical Data Model userid commentid videoid comment comments_by_user TIMEUUID K TEXT C UUID UUID ↑ videoid commentid userid comment comments_by_video TIMEUUID K TEXT C UUID UUID ↑
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Schema DDL CREATE TABLE IF NOT EXISTS comments_by_user ( userid uuid, commentid timeuuid, videoid uuid, comment text, PRIMARY KEY ((userid), commentid) ) WITH CLUSTERING ORDER BY (commentid DESC); CREATE TABLE IF NOT EXISTS comments_by_video ( videoid uuid, commentid timeuuid, userid uuid, comment text, PRIMARY KEY ((videoid), commentid) ) WITH CLUSTERING ORDER BY (commentid DESC);
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 We have everything we need Conceptual Data Model (Entities, Relations) Application Workflow (Queries) Database Family (Technos +Table)
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Api Design Methodology 1 killrvideo-dse Drivers DAO3 killrvideo-api-rest killrvideo-api-grpc killrvideo-api-graphql 2
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NEW PROFESSIONAL JAVA EVENT MAY 30th, 2020 KYIV, UKRAINE Cedrick Lunven | Director of Developer Advocacy #DataStax @clunven DEMO 3
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 https://github.com/clun /javafest-2020 docker-compose up –d
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Configuration – 1# Convention
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Configuration – #2 Java Config
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Configuration - #3 Custom Definition
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 CLIENT API DRIVER Parameters SynchronousQueries PreparedStatement & Parameters Bind Parameters BoundStatement ResultSet ResultSet Results Blocked API
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 CLIENT API DRIVER v Parameters AsyncQueries PreparedStatement & Parameters Bind Parameters BoundStatement AsyncResultSet AsyncResultSet Result API CompletionStage Callback Hell
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 CLIENT API DRIVER v Parameters ReactiveQueries PreparedStatement & Parameters Bind Parameters Row ReactiveRow Flux API ReactiveResultSet Subscribe BoundStatement Subscriber.onNext Query execution onComplete()
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NEW PROFESSIONAL JAVA EVENT MAY 30th, 2020 KYIV, UKRAINE Cedrick Lunven | Director of Developer Advocacy #DataStax @clunven DECISION TREE 4
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Analysis Criteria Conceptual Data Model Application Workflow (Queries) Database Family (Technos +Table) Caching Sync vs Async Reactive SLA (Volume) Data Integrity Filters Paging Sort Latencies Throughput Versionning Confidentiality Atomicity Cardinality Developers Users/Consumers Language CodeFirst/ Vs SchemaFirst Documentation Test Build Packaging Api Catalog Internal vs Public Techno Profile XP
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Analysis Matrix
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Decision Tree
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 v Decoupling Client / Server (Schema on read) v Api Lifecycle (Versioning) v Tooling (API Management, Serverless) v Verbose payloads (json, xml) v No discoverability v Not suitable for command-like (functions) API v CRUD superstar v Relevant for mutations (OLTP) v Public and web APIs
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 v High Performances (http/2 – binary serialisation) v Multiple stubs : Sync, Async, Streaming v Multi languages - Interoperability v Strongly coupled (schema with proto files) v No discoverability v Protobuf serialization format v Distributed network of services (no waits) v High throughput & streaming use cases v Command-like (eg: slack)
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 v Discoverability, documentation v Custom payloads v Match standards (Json | Http) v Single endpoint (versioning, monitoring, security) v Complex implementation (tooling, still young) v Nice for customers nasty for DB (N+1 select) v Backend for frontend (JS) v Service aggregation | composition (joins) v When volume matters (mobile phones) GraphQL
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NEW PROFESSIONAL JAVA EVENT MAY 30th, 2020 KYIV, UKRAINE Cedrick Lunven | Director of Developer Advocacy #DataStax @clunven RESOURCES 5
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Github repo https://github.com/clun/javafest-2020
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 DataStax Developers on Youtube • https://www.youtube .com/channel/UCAIQ Y251avaMv7bBv5PCo -A
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Sample CODES Micro-service REST https://bit.ly/31RL62I Micro-service GraphQL https://bit.ly/2MVicup Micro-service GRPC Micro-service Kafka Reactive with Webflux Micro-service Serverless https://bit.ly/2pofk0b https://bit.ly/34ePzhL https://bit.ly/2JwsFdM https://bit.ly/31VQz8G
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 community.datastax.com
switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NEW PROFESSIONAL JAVA EVENT MAY 30th, 2020 KYIV, UKRAINE THANK YOU ! (@clunven)

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JavaFest. Cedrick Lunven. Build APIS with SpringBoot - REST, GRPC, GRAPHQL which one should you pick?

  • 1. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Cedrick Lunven | Director of Developer Advocacy #DataStax @clunven Build APIS with SpringBoot REST, GRPC, GRAPHQL Which one should you pick?
  • 2. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 About me: Cedrick Lunven Director of Developer Advocacy Creator and Maintainer of FF4j Java and Spring Dinosaur
  • 3. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Agenda 50min 2 3 DEMO and Code Browse Data Model & Persistence with Apache Cassandra 1 Anatomy of a Spring Boot Micro service 4 Decision tree 5 Take my code and slides + Q&A
  • 4. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NEW PROFESSIONAL JAVA EVENT MAY 30th, 2020 KYIV, UKRAINE Cedrick Lunven | Director of Developer Advocacy #DataStax @clunven Anatomy of a Spring Boot Microservice 1
  • 5. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Monolithic Business Logic User Interface Data Interface Multichannel UI Mobile UI Web ESB SOA Specialization BUS S1 S2 S3 Sn RDBMS noSQL DataLake Micro Frontend All Things Distributed Web Components SPA Native BFF (Backend for Frontend) Micro Services Data Mesh Api Gateway Service Discovery RDBMS Graph Hadoop Document KV newSQLColumn TSDB Distributed Tracing Containerization Layers Business Logic (Services) User Interface Data Interface (Dao) Backend Front-end OLTP OLAP RDBMS Microservices Architectures
  • 6. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Building a Spring Boot Microservice Exposition Layer Service Layer Persistence Layer Database Data Model Configuration Monitoring Security Access Patterns Volume Throughput Latency Security (Service, Component) (Controllers) (Dao, Repository)
  • 7. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 « Vanilla » So easy…. Exposition Layer Service Layer Persistence Layer Database Microservice (Service, Component) (Controllers) (Dao, Repository) 1 Normalized Data Model 2 CRUD
  • 8. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 « Vanilla » So easy…. Exposition Layer Service Layer Persistence Layer Database Microservice (Service, Component) (Controllers) (Dao, Repository) DATA DATA-REST WEB MVC Configuration Monitoring Security Database Driver
  • 9. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Entity => Spring-Data => Spring-Data-REST @Entity public class Customer { @Id @GeneratedValue(strategy=GenerationType.AUTO) private Long id; private String firstName; private String lastName; private Customer() {} private Customer( String firstName, String lastName) { this.firstName = firstName; this.lastName = lastName; } @RepositoryRestResource( collectionResourceRel = "customers", path = "customers") public interface CustomerRepository extends CrudRepository<Customer, Long> { List<Customer> findByLastName(String lastName); Customer findById(long id); }
  • 10. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 When volumes grow ? Exposition Layer Service Layer Persistence Layer Database Microservice (Service, Component) (Controllers) (Dao, Repository) CREATE INDEX JOIN SHARDING … 3 CUSTOM QUERIES
  • 11. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 CAP Theorem for Distributed Systems Consistency Availability Partition Tolerance ?
  • 12. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NEW PROFESSIONAL JAVA EVENT MAY 30th, 2020 KYIV, UKRAINE Cedrick Lunven | Director of Developer Advocacy #DataStax @clunven Persistence Layer and Data Model with Apache Cassandra™ 2
  • 13. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NODE NODE NODE NODE NODE NODE NODE Apache Cassandra™ 1 Installation = 1 NODE ü Capacity: ± 1TB ü Throughput: 3000 Tx/sec/core Communication: ü Gossiping DataCenter | Ring = Distributed NoSQL Database
  • 14. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Scales Linearly • Need more capacity? • Need more throughput? • Add nodes!
  • 15. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Data is Distributed Country City Habitant USA New York 8.000.000 USA Los Angeles 4.000.000 FR Paris 2.230.000 DE Berlin 3.350.000 UK London 9.200.000 AU Sydney 4.900.000 FR Toulouse 1.100.000 JP Tokyo 37.430.000 IN Mumbai 20.200.000 DE Nuremberg 500.000 CA Montreal 4.200.000 CA Toronto 6.200.000 Partition Key
  • 16. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Data is replicated 59 (data) RF = 3 0 50 33 1783 67
  • 17. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Data is replicated RF = 3 0 50 33 1783 67 59 (data)59 (data)
  • 18. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Data is replicated RF = 3 0 50 33 1783 67 59 (data) 59 (data) 59 (data)
  • 19. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Self Healing RF = 3 0 50 33 1783 67 59 (data)59 (data)
  • 20. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Self Healing RF = 3 0 50 33 1783 67 59 (data) 59 (data) 59 (data) Hint
  • 21. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Self Healing RF = 3 0 50 33 1783 67 59 (data) 59 (data) 59 (data) Hint
  • 22. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Self Healing RF = 3 0 50 33 1783 67 59 (data) 59 (data) 59 (data)
  • 23. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Use Cases High Throughput High Volume Mission Critical Availability Realtime Distributed Heavy Writes Heavy Reads Event Streaming Internet of Things Log Analytics Any TimeSeries Caching Market Data Prices No Data Loss Reponsive System Any CRUD API Layer Geograhically DeploymentsD R A S Banking Track and Trace Customer Apps Enterprise Data Layer Applications Global Company Retailers Hybrid Cloud MultiCloud ?
  • 24. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Apache Cassandra MicroServices • REALTIME REQUESTS & SCALABILITY AT CORE • DISTRIBUTED ARCHITECTURES – From ACID to BASE (Basic Availability, Soft-State, Eventual Consistency) – Implementations: CQRS, Event Sourcing – Colocate service and Data • DECOUPLING BY DESIGN – 1 KEYSPACE = DOMAIN – 1 QUERY = 1 TABLE
  • 25. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Reference Application http://killrvideo.github.io
  • 26. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Data Model Design Entities & Relationships Queries
  • 27. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Conceptual Data Model
  • 28. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Application Workflow R1: Find comments related to target video using its identifier • Get most recent first • Implement Paging R2: Find comments related to target user using its identifier • Get most recent first • Implement Paging R3: Implement CRUD operations
  • 29. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Mapping Q2: Find comments posted for a user with a known id (show most recent first) comments_by_video comments_by_user Q1: Find comments for a video with a known id (show most recent first) Q3: CRUD Operations
  • 30. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Logical Data Model userid creationdate commentid videoid comment comments_by_user K C ↑ videoid creationdate commentid userid comment comments_by_video C ↑ K C ↑ ↑C
  • 31. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Physical Data Model userid commentid videoid comment comments_by_user TIMEUUID K TEXT C UUID UUID ↑ videoid commentid userid comment comments_by_video TIMEUUID K TEXT C UUID UUID ↑
  • 32. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Schema DDL CREATE TABLE IF NOT EXISTS comments_by_user ( userid uuid, commentid timeuuid, videoid uuid, comment text, PRIMARY KEY ((userid), commentid) ) WITH CLUSTERING ORDER BY (commentid DESC); CREATE TABLE IF NOT EXISTS comments_by_video ( videoid uuid, commentid timeuuid, userid uuid, comment text, PRIMARY KEY ((videoid), commentid) ) WITH CLUSTERING ORDER BY (commentid DESC);
  • 33. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 We have everything we need Conceptual Data Model (Entities, Relations) Application Workflow (Queries) Database Family (Technos +Table)
  • 34. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Api Design Methodology 1 killrvideo-dse Drivers DAO3 killrvideo-api-rest killrvideo-api-grpc killrvideo-api-graphql 2
  • 35. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NEW PROFESSIONAL JAVA EVENT MAY 30th, 2020 KYIV, UKRAINE Cedrick Lunven | Director of Developer Advocacy #DataStax @clunven DEMO 3
  • 36. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 https://github.com/clun /javafest-2020 docker-compose up –d
  • 37. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Configuration – 1# Convention
  • 38. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Configuration – #2 Java Config
  • 39. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Configuration - #3 Custom Definition
  • 40. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 CLIENT API DRIVER Parameters SynchronousQueries PreparedStatement & Parameters Bind Parameters BoundStatement ResultSet ResultSet Results Blocked API
  • 41. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 CLIENT API DRIVER v Parameters AsyncQueries PreparedStatement & Parameters Bind Parameters BoundStatement AsyncResultSet AsyncResultSet Result API CompletionStage Callback Hell
  • 42. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 CLIENT API DRIVER v Parameters ReactiveQueries PreparedStatement & Parameters Bind Parameters Row ReactiveRow Flux API ReactiveResultSet Subscribe BoundStatement Subscriber.onNext Query execution onComplete()
  • 43. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NEW PROFESSIONAL JAVA EVENT MAY 30th, 2020 KYIV, UKRAINE Cedrick Lunven | Director of Developer Advocacy #DataStax @clunven DECISION TREE 4
  • 44. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Analysis Criteria Conceptual Data Model Application Workflow (Queries) Database Family (Technos +Table) Caching Sync vs Async Reactive SLA (Volume) Data Integrity Filters Paging Sort Latencies Throughput Versionning Confidentiality Atomicity Cardinality Developers Users/Consumers Language CodeFirst/ Vs SchemaFirst Documentation Test Build Packaging Api Catalog Internal vs Public Techno Profile XP
  • 45. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Analysis Matrix
  • 46. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Decision Tree
  • 47. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 v Decoupling Client / Server (Schema on read) v Api Lifecycle (Versioning) v Tooling (API Management, Serverless) v Verbose payloads (json, xml) v No discoverability v Not suitable for command-like (functions) API v CRUD superstar v Relevant for mutations (OLTP) v Public and web APIs
  • 48. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 v High Performances (http/2 – binary serialisation) v Multiple stubs : Sync, Async, Streaming v Multi languages - Interoperability v Strongly coupled (schema with proto files) v No discoverability v Protobuf serialization format v Distributed network of services (no waits) v High throughput & streaming use cases v Command-like (eg: slack)
  • 49. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 v Discoverability, documentation v Custom payloads v Match standards (Json | Http) v Single endpoint (versioning, monitoring, security) v Complex implementation (tooling, still young) v Nice for customers nasty for DB (N+1 select) v Backend for frontend (JS) v Service aggregation | composition (joins) v When volume matters (mobile phones) GraphQL
  • 50. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NEW PROFESSIONAL JAVA EVENT MAY 30th, 2020 KYIV, UKRAINE Cedrick Lunven | Director of Developer Advocacy #DataStax @clunven RESOURCES 5
  • 51. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Github repo https://github.com/clun/javafest-2020
  • 52. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 DataStax Developers on Youtube • https://www.youtube .com/channel/UCAIQ Y251avaMv7bBv5PCo -A
  • 53. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 Sample CODES Micro-service REST https://bit.ly/31RL62I Micro-service GraphQL https://bit.ly/2MVicup Micro-service GRPC Micro-service Kafka Reactive with Webflux Micro-service Serverless https://bit.ly/2pofk0b https://bit.ly/34ePzhL https://bit.ly/2JwsFdM https://bit.ly/31VQz8G
  • 54. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 community.datastax.com
  • 55. switch(SpringBoot.api()) { Case REST,GRAPHQL,GRPC } | @clunven KYIV, 2020 NEW PROFESSIONAL JAVA EVENT MAY 30th, 2020 KYIV, UKRAINE THANK YOU ! (@clunven)