Spring provides an extensive support for task scheduling with different options to meet different requirements. The annotation used by spring is @Scheduled. In this article, we will see the possible ways we can use this annotation and the configuration which has to be done to support this annotation.Also we will discuss about different configurations we …
How to Schedule tasks using @Scheduled Annotation in Spring Read More »
What is structure of JWT token In our previous post we explained about how JWT is used as an authorization strategy for web security and why it is so popular these days. In this article we will look into the structure of JWT in detail and how its structure helps to achieve most of the …
In this post we will talk about what JWT is and how it is used to secure web application. We will discuss about how it works and why it is so popular these days for web authorization and security. So Lets begin. JWT stands for Json Web Token. If you refer the JWT official site …
Builder design pattern is useful in situation where we need to construct a complex object with lot of attributes. This pattern comes under Creational Design Pattern as it deals with the Object Creation and encapsulates the whole process of object creation at a single place. Many of us have come through the situations where We …
In the previous article, we gave a detailed idea about what is CORS and how does it work. In this article we will explain the necessary configurations , one has to make in server side spring application to enable cross origin requests. Lets begin. Enabling CORS To enable Cross Origin Requests to enable the rest …
How to enable Cross Origin requests to access rest API in Spring? Read More »
You must have come across a situation where in you build a UI and connect to a remote API to fetch some data. The API works fine when accessed through postman or other rest client but when your UI calls the API, it fails. Why that happens? If you closely look into the error log …
Exception Handling is an integral part of any application and a good design for exception handling can give a better experience to the users. It makes your application very interactive. Spring provides an efficient framework for exception handling which makes it centralized and easy to use. Disadvantage with previous approach No separation of concern: There …
How to do exception Handling in Spring for REST Api? Read More »
Introduction In this article, we will try to explain one to many relationship between two entities/tables and how it can be done using Hibernate/ Spring data JPA. While we all know about @OneToMany and @ManyToOne annotations, but there are lot of confusions around it regarding what is the best way to implement it to achieve …
Inheritance and Composition are two very popular programming techniques of code re-usability . So it is very important to know when to use inheritance over composition and vice versa. Sometimes we tend to over use inheritance when composition can be a better choice. A clear understanding of both can be very useful for code organisation …
What is immutable class? Immutable java class means its state cannot be changed. Generally the state of the class is determined by its fields or properties. There are certain ways by which we can prevent the state of a class to be unchanged which is explained in detail further. When do we need to make …