Event-Driven Architecture

Event-Driven Architecture
JVM Meetup #13

Transcript

1. EVENT-DRIVEN ARCHITECTURE
2. EKO KURNIAWAN KHANNEDY ▸ Senior Principal R&D Engineer at Blibli.com ▸ Part of R&D Team ▸ eko.k.khannedy@gdn-commerce.com ▸ JVM User Group Indonesia Committee ▸ Spring Cloud Contributor EVENT-DRIVEN ARCHITECTURE
3. MONOLITH FIRST LARGE MONOLITH APPLICATION EVENT-DRIVEN ARCHITECTURE
4. MONOLITH MODULES ORDER SERVICE CUSTOMER 
 SERVICE MERCHANT
 SERVICE CART
 SERVICE CONTENT
 SERVICE ... EVENT-DRIVEN ARCHITECTURE
5. MONOLITH PROBLEM ▸ The large monolithic code base intimidates developers. ▸ Overloaded IDE & web container. ▸ Scaling the application can be difficult. ▸ Requires a long-term commitment to a technology stack. EVENT-DRIVEN ARCHITECTURE
6. STRANGLER APPLICATION LEGACY
 SYSTEM ... CUSTOMER 
 SERVICE EVENT-DRIVEN ARCHITECTURE https://www.martinfowler.com/bliki/StranglerApplication.html
7. MICROSERVICES ERA ORDER MANAGEMENT CUSTOMER 
 MANAGEMENT MERCHANT
 MANAGEMENT CART
 MANAGEMENT CONTENT
 MANAGEMENT ... EVENT-DRIVEN ARCHITECTURE
8. TYPE OF MICROSERVICES MESSAGE
 SERVICE RISK
 SERVICE ... PRODUCT
 SERVICE MEMBER
 SERVICE PAYMENT
 SERVICE INVENTORY
 SERVICE ORDER 
 SERVICE ... UTILITY MASTER DATA CART
 SERVICE FLASHSALE 
 SERVICE ... ORCHESTRATOR EVENT-DRIVEN ARCHITECTURE
9. API DRIVEN / ORCHESTRATION PATTERN Checkout Cart Create Payment CART
 SERVICE ORDER 
 SERVICE PAYMENT
 SERVICE Create Order EVENT-DRIVEN ARCHITECTURE
10. ORCHESTRATION PATTERN PROBLEM Checkout Cart Send Email Create Payment CART
 SERVICE ORDER 
 SERVICE MESSAGE
 SERVICE PAYMENT
 SERVICE Create Order EVENT-DRIVEN ARCHITECTURE
11. EVENT DRIVEN / CHOREOGRAPHY PATTERN Checkout Cart Send Email Create Payment CART
 SERVICE ORDER 
 SERVICE MESSAGE
 SERVICE PAYMENT
 SERVICE Create Order CART EVENT EVENT-DRIVEN ARCHITECTURE
12. EVENT DRIVEN / CHOREOGRAPHY PATTERN Checkout Cart Send Email Create Payment CART
 SERVICE ORDER 
 SERVICE MESSAGE
 SERVICE PAYMENT
 SERVICE Create Order CART EVENT RISK
 SERVICE Calculate Risk Score EVENT-DRIVEN ARCHITECTURE
13. CHOREOGRAPHY PATTERN PROBLEM Checkout Cart Send Email Create Payment CART
 SERVICE ORDER 
 SERVICE MESSAGE
 SERVICE PAYMENT
 SERVICE Create Order CART EVENT RISK
 SERVICE Calculate Risk Score EVENT-DRIVEN ARCHITECTURE
14. EVENT-CARRIED STATE TRANSFER Checkout Cart Send Email Create Payment CART
 SERVICE ORDER 
 SERVICE MESSAGE
 SERVICE PAYMENT
 SERVICE Create Order FULL CART EVENT RISK
 SERVICE Calculate Risk Score CART DATA CART DATA CART DATA CART DATA EVENT-DRIVEN ARCHITECTURE
15. EVENT-DRIVEN ARHITECTURE EVENT-CARRIED STATE TRANSFER ▸ Good Part ▸ Decoupling ▸ Reduced load on producer ▸ Bad Part ▸ Replicated Data ▸ Eventual Consistency
16. EVENT-DRIVEN MICROSERVICES CART
 SERVICE ORDER
 SERVICE MEMBER
 SERVICE MERCHANT
 SERVICE RISK
 SERVICE ... MESSAGE BROKER API GATEWAY EVENT-DRIVEN ARCHITECTURE
17. EVENT VS COMMAND
18. IDEMPOTENT
19. SAME CALL REPEATEDLY WILL PRODUCE THE SAME RESULT. IN OTHER WORDS, MAKING MULTIPLE IDENTICAL REQUESTS HAS THE SAME EFFECT AS MAKING A SINGLE REQUEST What is idempotent mean? BLIBLI WALLET ARCHITECTURE https://www.restapitutorial.com/lessons/idempotency.html
20. EVENT-DRIVEN ARHITECTURE IDEMPOTENT EVENT ▸ SaveMemberEvent ▸ MemberBalanceChangedEvent ▸ SaveOrderEvent ▸ SavePaymentEvent ▸ MemberAddressChangedEvent ▸ ...
21. EVENT-DRIVEN ARHITECTURE NON IDEMPOTENT EVENT ▸ IncreaseMemberBalanceEvent ▸ DecreaseMemberBalanceEvent ▸ SendAnEmail ▸ SendOrderNotification ▸ ...
22. CQRS (COMMAND QUERY RESPONSIBILITY SEGREGATION) https://martinfowler.com/bliki/CQRS.html
23. NON CQRS SERVICE DATASOURCE EVENT-DRIVEN ARHITECTURE Write Request Read Request
24. DATASOURCE CQRS - SEPARATED COMPONENT COMMAND
 MODEL EVENT-DRIVEN ARHITECTURE Write Request Read Request QUERY
 MODEL
25. EVENT-DRIVEN IN CQRS API GATEWAY MONGODB PRODUCT SERVICE PRODUCT SEARCH SERVICE ELASTICSEARCH APACHE KAFKA Write Request EVENT-DRIVEN ARHITECTURE Read Request Produce Event Consume Event
26. EVENT AGGREGATION
27. EVENT-DRIVEN ARHITECTURE EVENT AGGREGATION PROBLEM ▸ How to aggregate data from several services? https://www.enterpriseintegrationpatterns.com/patterns/messaging/Aggregator.html
28. AGGREGATOR SERVICE API GATEWAY DATASTORE AGGREGATOR SERVICE MESSAGE BROKER Read Aggregate Data Aggregate and Save It Receive All Events EVENT-DRIVEN ARHITECTURE Get Aggregate Data
29. THE CHALLENGES
30. EVENT-DRIVEN ARHITECTURE THE CHALLENGES OF EVENT-DRIVEN ARCHITECTURE ▸ Asynchronous ▸ Message Schema ▸ Versioning ▸ Tracing ▸ Message Order ▸ Consumer Complexity ▸ Message Broker
31. BLIPAY
32. https://www.blibli.com/member/blipay/
33. SAMPLE EVENT-DRIVEN IN BLIPAY ▸ Register new merchant ▸ Register new member ▸ Refund member cash ▸ Get member + balance ▸ Receive payment confirmation from Bank ▸ … EVENT-DRIVEN ARHITECTURE
34. REGISTER NEW MERCHANT BLIPAY-API BLIPAY-MEMBER BLIPAY- MERCHANT BLIPAY-CORE BLIPAY-PAYMENT BLIPAY- NOTIFICATION BLIPAY- PROMOTION APACHE KAFKA 1. HTTP Request 2. HTTP Request 3. SaveMerchantEvent 4. SaveMerchantEvent EVENT-DRIVEN ARHITECTURE
35. REGISTER NEW MEMBER BLIPAY-API BLIPAY-MEMBER BLIPAY- MERCHANT BLIPAY-CORE BLIPAY-PAYMENT BLIPAY- NOTIFICATION BLIPAY- PROMOTION APACHE KAFKA 1. HTTP Request 2. HTTP Request 3. SaveMemberEvent 4. SaveMemberEvent 4. SaveMemberEvent EVENT-DRIVEN ARHITECTURE
36. REFUND MEMBER CASH BLIPAY-API BLIPAY-MEMBER BLIPAY- MERCHANT BLIPAY-CORE BLIPAY-PAYMENT BLIPAY- NOTIFICATION BLIPAY- PROMOTION APACHE KAFKA 1. HTTP Request 2. HTTP Request 4. SaveBalanceEvent 3. Some Events 4. SaveTransactionEvent EVENT-DRIVEN ARHITECTURE
37. GET MEMBER + BALANCE BLIPAY-API BLIPAY-MEMBER BLIPAY- MERCHANT BLIPAY-CORE BLIPAY-PAYMENT BLIPAY- NOTIFICATION BLIPAY- PROMOTION APACHE KAFKA 1. HTTP Request 2. HTTP Request EVENT-DRIVEN ARHITECTURE
38. RECEIVE PAYMENT FROM BANK BLIPAY-API BLIPAY-MEMBER BLIPAY- MERCHANT BLIPAY-CORE BLIPAY-PAYMENT BLIPAY- NOTIFICATION BLIPAY- PROMOTION APACHE KAFKA 1. HTTP Request 2. HTTP Request 3. SavePaymentEvent 4. SavePaymentEvent 4. SavePaymentEvent 5. SaveBalanceEvent 6. SaveBalanceEvent EVENT-DRIVEN ARHITECTURE
39. ANY QUESTION? https://www.blibli.com/page/karir/ EVENT-DRIVEN ARHITECTURE https://medium.com/bliblidotcom-techblog