The successful realization of microservice architecture requires building a software application as a collection of services, which are integrated together via diverse network communication patterns and protocols, and streamlining such integrations from dev to production with continuous delivery.

1. Microservice Integration from Dev to Production
Kasun Indrasiri
Director – Integration Architecture, WSO2 December 2018
gRPC, OpenAPI, Kafka and Codefresh Integration

2. Why Integrating Microservices?
○ Integration is essential to build any real world use case with cloud native
apps.
○ Microservices/cloud native applications are connected via network calls.

3. Integration in Pre-microservices Era
○ Centralized ESB layer provides integration and network communication
and governance capabilities.
Virtual
Service 1
Service A
Virtual
Service 2
Virtual
Service 3
Service B Service C Service D
ESB
Consumers

4. How to Integrate Microservices
○ Microservices code has to take care of all network communication and
governance of services
Microservice
X
Microservice
P
Microservice
Y
Microservice
z
Microservice
Q
Microservice
R
Microservice
S
Java
Consumers
Node.js Go

5. Synchronous Messaging
○ Synchronous/request-response communication
Consumer 1
API Service P API Service Q API Service R API Service S
Consumers
Consumer 2 Consumer 3
μ Service A
Proprietary
& Legacy
Systems
Web API /
SaaS
API Services/
Edge Services
Composite Service/
Integration
Services
Core Services/
Atomic Services
μ Service I
μ Service H
μ Service J
μ Service E
μ Service C
μ Service D
μ Service G
μ Service B
μ Service F
API
Management

6. Asynchronous Event-driven Communication
○ Sending message and not wait for a response
μ Service A μ Service B μ Service C
Event Bus
μ Service D
Produce Consume
Produce Consume
Produce Consume
Produce Consume

7. Catalog
Microservices Integration Use Case with Ballerina
Consumers
Checkout
REST/OpenAPI
Inventory
Shipping OderProc
Kafka
ProductInfo
REST/OpenAPI
gRPCgRPC
Ballerina Ballerina
Ballerina
Ballerina
Ballerina
Ballerina
CSV

8. CodeFresh
● A continuous delivery platform built for Kubernetes

9. CodeFresh Integration
● Use case

10. Source Code and References
○ https://github.com/kasun04/microservices-integration-ballerina
○ https://github.com/kasun04/ballerina-codefresh
○ Generic overview on microservices messaging and integration ->