Microservices Architecture with exmaple

Microservices are a way to break down a monolithic application into small, simple and independent services that work together, where each is responsible fro a specific function. This brings scalability

The basic concept of microservices also talks about the

Features of MicroServices:
- Service Oriented Approach
- Componentization via Services
- Organized around business capabilities
- Products not projects
- Smart end point dump pipes
- Decentralized governance
- Decentralized data management
- Infrastructure automation
- Design for failure
- Evolutionary design

Tools for building Micro Services

- Scriptable cloud infrastructire to automate continuos delivery release pipelines
- Reliable Messaging Infrastructire to allow service chirography
- Highly productive development framework
- Containerless runtime to allow deployment of one executable per service

Spring Boot

- It makes it easy to create stand-alone, production-grade Spring based Applications.
- Embed Tomcat or Jetty Directly (no need to deploy WAR files)
- Automatically configure Spring whenever possible
- Provide production ready features such as metrics, health checks and externalized configuration.

Create a Spring Boot Application :

References :

This is an example to package and run a spring boot application as a microservice. It will bring up the spring application with an embedded web server.  The executable jar includes all the required libraries to run this as an independent service. Following are the details :

• The code can be downloaded from github:

https://github.com/SanjayIngole/demo-microservice-springboot/archive/master.zip

• There is runnable microservice jar as well that can be downloaded from following location:

https://github.com/SanjayIngole/demo-microservice-springboot/blob/master/DemoMicroServices/target/demo-0.0.1.jar

• To run this microservic. It will bring up the spring application with an embedded web server. 

java -jar demo.jar

• A test page can be used to upload the sample xml and obtain JSON response.

https://github.com/SanjayIngole/demo-microservice-springboot/blob/master/DemoMicroServices/src/main/resources/testpage.html

• You can use a docker or boxfuse to deploy this on cloud. I use boxfuse to deploy my microservices to aws. You can setup a boxfuse account (https://console.boxfuse.com/) and configure your aws instance, and then download boxfuse command line client.
• 
  
• Package your project using maven, which will package all dependent jars in one file.
• mvn package
• And then deploy it using boxfuse command, this deploy this application on configured aws instance. 
• boxfuse run demo:0.0.1