Spring Boot + Spring Data + Apache Camel (Service Composition Example)

This is a simple example to show you how to implement a composite service from simple services usign Apache Camel

Libraries and Tools

• [Module] Spring Boot
• [Module] Spring Data
• [Library] Apache Camel
• [Library for converting object to/from json] [Google Gson] (https://github.com/google/gson)
• [Library for auto-generating getters, setters, constructors and others] Lombok
• [Library] Thymeleaf
• [Database] H2

How it works

Bellow is the relationship diagram between different modules provided in the example.

This is a simple banking business flow. There is a simple Customer service. Each customer is either Real or Legal and has a one-to-one relationship with either RealBaseInfo or LegalBaseInfo respectively. This base information services contains information like first and last names for real customers and organization name, code and address for legal customers. Each of these services is implemented as a Spring Boot application and simply on different ports. A composite service has been implemented to combine these two services as a single one using Apache Camel. Additionally, for simple testing another service has been implemented too which is a UI module and is responsible to interact with all the other three services.

How to run

• Start customer-service module. It can be verified using url http://localhost:8085/customers.
• Start real-base-info-service module. It can be verified using url http://localhost:8086/realbaseinfos.
• Start legal-base-info-service module. It can be verified using url http://localhost:8087/legalbaseinfos.
• Start composite-rest module. It can be verified using url http://localhost:8080/customerBaseInfos?cid=1.
• Start ui-service module and look at http://localhost:8088/ to view real customers. Look at http://localhost:8088/legal to view legal customers. Look at http://localhost:8088/parallel to view customers, real base info and legal base info which have been retrieved in parallel.