Microservices

This is just Microservices Architecture sample.

Services

Module	Service	Port	Description
ActiveMQ Broker	ActiveMQ	8161	ActiveMQ on Docker
Couchbase DB	Couchbase	8091	Couchbase on Docker
Cassandra	Cassandra	9042	Cassandra on Docker
Mongo DB	Mongo DB	11017	MongoDB on Docker
Email Orders Service	Spring Integration + PostgreSQL + Tomcat	6061	Email Orders service based on Spring Integration
Graylog Service	Graylog + ElasticSearch + ActiveMQ + MongoDB	6065	Centralized log service
Kafka Docker	Kafka on Docker	32770	Kafka and Zookeeper on Docker
Postgres DB	Postgre SQL	5432	PostgreSQL's on Docker
Redis Docker	Redis	6379	Redis on Docker
Stock Service	Reactive Spring + Cassandra + Netty	6063	Manages stock, supplies, orders and email orders
Warehouse Service	Spring REST + Kafka Consumer + Couchbase	6064	Stores and manages supplies, products, provides supplies to Stock Service
Supplier Service	Spring REST + Kafka Producer + MongoDB	6062	Handles supply-orders from Stock Service and provide ordered products to Warehouse Service
Service Registry	Eureka	8761, 8762, 8763	Eureka - Service Registry
Test Service	Spring Boot	1999	Test service
Admin	Spring Boot Admin	65505	App adminitration
Hystrix panel	Spring Boot	8015	Hystrix Dashboard
Turbine	Turbine	8902	SSE streams aggregation server
Zipkin	Zipkin	9411	Investigate system's behaviour and traces

Useful things

Spring Boot Admin

It is a web application, used for managing and monitoring Spring Boot applications. You should see all services except Email Order Service (todo).

see https://github.com/codecentric/spring-boot-admin

Hystrix dashboard

Monitoring hystrix metrics.

see https://github.com/Netflix-Skunkworks/hystrix-dashboard

Hystrix circuit breaker

Defending app from potentially failing method calls.

see https://github.com/Netflix/Hystrix/wiki/How-it-Works

Spring integration

Open source framework for enterprise application integration.

see https://spring.io/projects/spring-integration

GrayLog

App logs and monitoring.

see https://www.graylog.org/

Zipkin

Distributed tracing system

see https://zipkin.io/

Find out more

Apache ActiveMQ - JMS client	PostgreSQL - RDBMS
Graylog - Centralized log management system	Spring Integration - Integrating services with Spring
MongoDB - NoSQL Database	Elasticsearch - used as Storage system for GrayLog
Apache Kafka - Message broker	Apache Zookeeper - Synchronization service for kafka
Docker - OS level virtualization	Reactive Spring - Reactive programming in Spring
Spring WebFlux - Reactive APIs	Netty - Web Server
Tomcat - Web Server	Apache Cassandra - NoSQL Database
Open Feign - Java HTTP client	Zuul - L7 application gateway
Redis - Cache server, NoSQL Database	Couchbase - NoSQL Database
Hibernate - ORM	Zipkin - Distributed tracing system
Spring actuator - App monitoring	Spring Admin - Spring Projects Administration
Netflix Eureka - Services Regisrty	Hystrix + Tourbine - Circuit breakers + H-streams Aggregator
Ribbon - Client's side Load balancer	Google GSON - Serialization/deserialization library

TODO / what is missing

1. Actuator / SBA for Email Orders Service
2. docker-compose.yml for the project
3. Spring Security, Validation & Unit tests
4. Missing services: Vault(15), Service (13), API Gateway + Authorization Service

Author

Slawomir Hadas - Github