Spring State Machine

A Spring State Machine demo project using the credit card authorisation process to demonstrate the different state changes.

The card payment process transitions through the following states:

• NEW
• PRE_AUTH
• PRE_AUTH_ERROR
• AUTH
• AUTH_ERROR

The events triggering the state changes are as follows:

• PRE_AUTHORIZE
• PRE_AUTH_APPROVED
• PRE_AUTH_DECLINED
• AUTHORIZE
• AUTH_APPROVED
• AUTH_DECLINED

Based on the Spring Framework Guru example on Udemy.

Requirements

• Java 11
• Spring Boot 2.2.6.RELEASE
• Maven 3.6.2