1. Introduction. The OneToMany relationship is the most common JPA association and foreign key is controlled by the child-side directly including unidirectional and bidirectional association. This note presents how to configure bidirectional @OneToMany association 2. Bidirectional ManyToOne / OneToMany Relationships. Assuming that: Event entity references a single instance of User entity User entity references a… Read More »
1. Introduction. This note is to help us to build an API for pushing notifications and SMS to mobile devices using Amazon Simple Notification Service (SNS). Amazon provides the AWS SDK that enables simple and cost effective to send notifications/SMS message to 200+ countries. 2. AWS SNS and Maven configuration. 2.1 AWS SNS Access. –… Read More »
In this note I will create a URL shortening service using Spring Restful, Spring Boot, Liquibase, and PostgreSQL database. In a similar way of some shortening services, such as goo.gl, tinyurl.com, and bit.ly, purpose of the shortened URL may be more convenience for website and provide detailed information on clicks a link receives. 1. URL Shortener Service. The service will… Read More »