Project - Simple rest api for money transfers without Spring

AWS for test

AWS instance for test: http://ec2-18-224-25-189.us-east-2.compute.amazonaws.com:8080 (stopped)

Collection for postman of rest calls

Postman Collection: notForBuild/Rest Api.postman_collection.json

How to run project?

1. Build project using maven from the root pom file: mvn clean package
2. Go to web/target folder
3. Execute command: java -jar web-1.0-SNAPSHOT-jar-with-dependencies.jar

Task

The task was to build rest api using any light-weight frameworks or no frameworks. The solution should run as a standalone application, so it is assumed that any in-memory db should be used. I heard some time ago about Spark(Web, not big data) from course of MongoDb University as rest light weight framework that is very simple. So, I googled some information about it and decided to use it for my solution. What about some db persistence framework? I could use hibernate or myBatis, some people call them light-weight too, but is depends=) I decided to use a new tool for java-db object mapping called sql2o. It has very easy syntax and it is truly light.

Preliminary work

I modeled entities in jHipster for the database. Db model may be found in the initial commit in notForBuild top folder. Than I decided to model the project structure. Multi-module architecture has a lot of advantages, so I decided to split project to 2 packages: db and web.

I wrote all issues right here using github Issue Manager. History may be found here: https://github.com/dmcheremisin/spark-rest-api/issues

Technology stack:

• Java 8
• Spark java web framework
• Embeded H2 database
• Sql20 - database query library
• HikariCP connection pool
• Project Lombok
• Gson
• jUnit 4
• Mockito

Continuous integration

I had already experience of using Jenkins for continuos integration, but I prefere CircleCI. It is free, easy and has very good integration with github. Every commit I make is tested the same time by CircleCi automatically. Another advantage is that I can see status of build right in the repo README.md file(top of this page).

Docker

File for creation Docker image may be found in the folder notForBuild/Dockerfile. Instructions are here: notForBuild/docker commands.md

AWS

I also tested my solution on AWS free tier. I used Ubuntu 18.04 as image. Link to the application may be found on the top of the page.