SOA on Steroids
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Using Akka to implement Service Oriented Architecture Patterns
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SOA on Steroids
- 1. 2015/09/17 SOA on Steroids David Bolene in collaboration with
- 2. 2015 - David Bolene TOC Architecture for Cloud Services SOA on Akka 2 4 24 Demo 35 What is (was) SOA? 20 Why Akka? 7
- 3. 2015 - David Bolene TOC Architecture for Cloud Services SOA on Akka 3 4 24 Demo 35 What is (was) SOA? 20 Why Akka? 7
- 4. 2015 - David Bolene Architecture Motivators for Cloud Services - Elastic / Scalable - Modular - Simple - Low Latency - Service Integratable - Resilient - High Throughput 4
- 5. 2015 - David Bolene Architecture Anti-Patterns for Cloud Services - Transaction Locking in the Database - Locked/Synchronized Mutable Objects - Database Joins - Thread Blocking Method Calls - Thread Blocking Service Calls 5
- 6. 2015 - David Bolene TOC Architecture for Cloud Services SOA on Akka 6 4 24 Demo 35 What is (was) SOA? 20 Why Akka? 7
- 7. 2015 - David Bolene Akka Actors Inbox Message Actor or Future Async Send Enqueue Actor “one at a time”Dispatcher Threads Cores 7 How They Work
- 8. 2015 - David Bolene Akka Actor Actor Actor Supervises Actor Actor Actor Exception Actor Actor Actor re-start Self Healing 8
- 9. 2015 - David Bolene Akka Akka Persistence Actor Journal Store (e.g. Cassandra) Snapshot Store (e.g. Cassandra) Event Event Event snapshotIncremental Periodic async writes Message Actor Durability - An Event Sourced Approach 9
- 10. 2015 - David Bolene Akka Akka Persistence Actor Event Event Event snapshot Actor State Recovery latest replay 1 2 Journal Store (e.g. Cassandra) Snapshot Store (e.g. Cassandra) 10 then Disk Sequential Scans Message
- 11. 2015 - David Bolene REST based on Akka Socket Handler ActorTCP Packets socket REST Route Handler Actor HTTP Requests 11 Spray / Akka HTTP
- 12. 2015 - David Bolene Spray / Akka HTTP REST based on Akka Socket Handler ActorTCP Packets socket REST Route Handler Actor HTTP Requests Business Domain ActorMessage Context Continuation 12
- 13. 2015 - David Bolene Spray / Akka HTTP REST based on Akka Socket Handler ActorTCP Packets socket REST Route Handler Actor HTTP Requests Business Domain ActorMessage Context Continuation Socket Handler ActorTCP Packets socket HTTP Response Context Business Domain ActorMessage time 13
- 14. 2015 - David Bolene Async from Top to Bottom Domain Actors Cassandra Akka.IO HTTP Toolkit Socket Packets Spray REST Toolkit HTTP Commands / Events Turtles All the Way Down Async Writes 14
- 15. 2015 - David Bolene 15 Async from Front to Back Domain Actors Akka.IO HTTP Toolkit Socket Spray REST Toolkit Turtles All the Way Through Socket Spray Client Akka.IO HTTP Toolkit Frontend (REST Client Calls) Backend (External Service Calls)
- 16. 2015 - David Bolene Akka Clustering Actor Hosting Cluster Node Actor Hosting Cluster Node Actor Hosting Cluster Node Actor Hosting Cluster Node Actor Hosting Cluster Node Actor Hosting Cluster Node Scaling Actors… Message Akka 16 Akka Protocol
- 17. 2015 - David Bolene Akka FrontEnd (Spray) Virtualizing Actor Placement Backend Node Backend Node Backend Node Cluster Sharding Akka Cluster Sharding Message Shard Proxy (e.g.) Cassandra Re-hydrate on Demand Passivate on Inactivity Message 17
- 18. 2015 - David Bolene Akka Look Ma! No Transactions Shopping Cart Actor Cassandra 18 Live state is here NOT here
- 19. 2015 - David Bolene TOC Architecture for Cloud Services SOA on Akka 19 4 24 Demo 35 What is (was) SOA? 20 Why Akka? 7
- 20. 2015 - David Bolene Akka What is (was) SOA 20 (fat) Web Services Web Service Web Service Web Service Web Service Web Service XML / JSON XML / JSON XML / JSON XML / JSON XML / JSON
- 21. 2015 - David Bolene Akka What is (was) SOA 21 Process Orchestration (e.g. BPEL) Receive Order Request Credit Score Receive Credit Score Send Order Status Credit Service Customer Order Placement Process Seller Order Capture Process Customer Order Order Status Credit Request Credit Response
- 22. 2015 - David Bolene Akka What is (was) SOA 22 Choreography Choreography Contract Buyer Seller RFQ RFI Clarification Decline Quote P.O. DecisionStatusRequest DecisionStatus Negotiation Channel PostNegotiation Channel valid-until -dateTime expired Acceptance Channel LossNotification
- 23. 2015 - David Bolene TOC Architecture for Cloud Services SOA on Akka 23 4 24 Demo 35 What is (was) SOA? 20 Why Akka? 7
- 24. 2015 - David Bolene Akka What is a Service in Akka? 24 Web Service XML / JSON Micro service Actor JSON
- 25. 2015 - David Bolene Akka Akka Cluster Service Architecture FrontEnd (Spray) Backend Orchestration Actors FrontEnd (Spray) Backend Orchestration Actors FrontEnd (Spray) Backend Orchestration Actors Load Balancer Microservice Actors 1,2 Microservice Actors 3,4,5… Cluster Sharding (e.g. Fulfillment Process) External Web Services Spray Client State State 3 Message Cassandra Cassandra Cassandra 25
- 26. 2015 - David Bolene Akka Akka Cluster Service Architecture FrontEnd (Spray) Backend Orchestration Actors FrontEnd (Spray) Backend Orchestration Actors FrontEnd (Spray) Backend Orchestration Actors Load Balancer Microservice Actors 1,2 Microservice Actors 3,4,5… Cluster Sharding (e.g. Fulfillment Process) Can be dynamically added/removed for scale Can be scaled horizontally with Akka Actor Routers 1 26
- 27. 2015 - David Bolene and Comcast Akka Service Registry for Akka Discovery and Dependency Resolution of Service Actors… A B C D E Service Registry for Akka Microservice Actors 1 2 3 Subscribe to E Publish E Deliver E Microservice Actors Microservice Actors 4 Publish A 27 Actor Service Registry for Akka is a Comcast artifact soon to be open sourced
- 28. 2015 - David Bolene and Comcast Akka Service Registry for Akka Cluster-Wide Circuit Breaker Coordinator for Service Actors… A B C Service Registry for Akka Microservice Actors 3 1 2 UnPublish A Death Watch E E Unavailable Microservice Actors Microservice Actors E D 28 Actor Service Registry for Akka is a Comcast artifact soon to be open sourced
- 29. 2015 - David Bolene Akka Microservice Actors FSM Circuit Breaker 29 B Offline Online B [available] B [unavailable] A depends on Overseer supervises
- 30. 2015 - David Bolene Akka Akka Clustering Docker Container Docker Container Perfect with Docker RUN java -jar FrontEnd.jar 2551 RUN java -jar BackEnd.jar 2552 30
- 31. 2015 - David Bolene Akka Docker Runtime Provides Cluster Node Resiliency Docker Container Docker Container Docker Container Docker Container Docker Container Docker Container Container Restart Policy: always or on-failure Recovery 31
- 32. 2015 - David Bolene and Comcast Akka Service Registry for Akka Provides Microservice Dependency Recovery/Resiliency A B C D E Service Registry for Akka Microservice Actors 1 2 3 Subscribe to E Publish E Deliver E Microservice Actors Microservice Actors 4 Publish A 32
- 33. 2015 - David Bolene Akka Actor Actor Actor Supervises Actor Actor Actor Exception Actor Actor Actor re-start Akka systems are fault-tolerant (self-healing) 33
- 34. 2015 - David Bolene TOC Architecture for Cloud Services SOA on Akka 34 4 24 Demo 35 What is (was) SOA? 20 Why Akka? 7
- 35. 2015 - David Bolene 35 Bob Wilson’s Garage We repair your car (if our staff showed up today) and we detail it for free!
- 36. 2015 - David Bolene 36 FrontEnd (Spray) Client Backend Orchestration Actors Backend Orchestration Actors Staffing Microservice Car Detailing Microservice Sharded Order Fulfillment Processes Cassandra Cassandra Cassandra Car Repair Microservice Service Registry for Akka Bob Wilson’s Garage Cluster Depends On Depends On
- 37. 2015 - David Bolene 37 Initial State Car Repairing State Car Detailing State Finished Service Unavailable BobWilsonsGarage ServiceRequest Car Repair Microservice Car Detailing Microservice Staffing Microservice BobWilsonsGarage ServiceResponse REST Client Car Service Request Car Service Response Staffing Request Staffing Request Staffing Response Staffing Response Car Detail Request Car Detail Response Fulfillment Process Bob Wilson’s Garage in BPMN [Car Repair & Car Detailing Offline] [Car Detailing Offline] POST GET
- 38. 2015/09/17 dbolene@letsdox.com twitter: dbolene https://github.com/dbolene/BobWilsonsGarage SOA on Steroids David Bolene in collaboration with https://github.com/Comcast/ActorServiceRegistry
- 39. 2015 - David Bolene Cassandra Why Cassandra Cassandra Node Cassandra Node Cassandra Node Cassandra Node Cassandra Node eventually consistent replication eventually consistent replication Akka Actor-based in-memory state approach allows for use of eventually consistent NoSQL persistence. 39 Cassandra is the best write-optimized scalable and production maintainable NoSQL system on the market (fits Akka perfectly).
- 40. 2015 - David Bolene Cassandra Why Cassandra Cassandra Node Cassandra Node Cassandra Node Cassandra Node Cassandra Node 40 Client Write Consistency Tunable Read Consistency Tunable
- 41. 2015 - David Bolene Why Cassandra Cassandra Node Cassandra Node Cassandra Node Cassandra Node Cassandra Node Cassandra Node Cassandra Node Cassandra Node Cassandra Node Cassandra Node Data Center Replication 41 Reporting & Analytics Online Cluster Reporting Cluster
- 42. 2015 - David Bolene Materialized Views How to Use Cassandra 42 Actor Journal Store Snapshot Store Event Event Event snapshot Fulfillment (Actor) State Property 2 Mutate Party (Actor) Fulfillment (Actor) Property 1 Property 2 Materialized View - Party Vs Fulfillment Materialized View - Party Vs FuflillmentState Designed for sequential scans Designed for sequential scans Side-EffectSide-Effect Party (Actor)