kasim / acmebank

ACME Bank Account Manager

Readme

Quick Start

Prerequisites

• Java 11 JDK or higher

Start Service Steps

1. Pull code from this repository to your local.
2. Change directory to acmebank
3. On MacOS/Linux ./mvnw package Or On Windows .\mvnw.cmd package
4. On MacOS/Linux ./mvnw spring-boot:run Or On Windows .\mvnw.cmd spring-boot:run

Or

1. Import this project to IntelliJ
2. Right click src/main/java/com/acmebank/accountsServices/AccountsApplication to show menu.
3. click Run 'AccountsApplic...'

Endpoints

• GET http://localhost:8080/account/{id}
• POST http://localhost:8080/accounts/transfer

Request body of POST http://localhost:8080/accounts/transfer

{
    "fromAccountId": 88888888,
    "toAccountId": 12345678,
    "amount": 100
}

Assumptions

• Assumed authorization has been done on gateway level.
• Assumed this service is a microservice to operate accounts belong to same user.
• Assumed low latency is not critical to this service, use database lock to entity for money transfer.
• In this project, I implemented the 'get the balance of my account' feature first. I have three reasons:
  1. As required to have initial balance of 1,000,000 HKD in accounts, I could establish H2 database in this project first.
  2. After database established, I need to think about the entity model of required which helps to build all the building blocks I need in this project.
  3. I chose to use Spring Data with H2 which simplify this implementation after I defined all the entities.
• Cannot use account-manager in package name, I used account_manager instead.
• If you want to keep the data in H2 database, please set spring.sql.init.mode=never before second startup; If not, please delete acmebank.mv.db after the startup.