This article is an introduction to GraphQL with spring boot. We will discuss basic concepts of GraphQL and setup a spring boot app for schema-driven development. What is GraphQL ? GraphQL is a data query language. It was created by Facebook. GraphQL provides a new API standard similar to REST. In REST API, the fundamental […]
Spring boot cheatsheet
Annotations Spring Boot and the rest of the Spring framework can be effectively configured using Annotations, starting from Java5. Below is a list of commonly used and/or powerful annotations to get up and running with Spring boot. Spring Framework Annotations Spring uses the below annotations to create and inject beans into the application context. These […]
Spring Boot Devtools
Spring Boot Devtools Spring boot devtools has become a very popular dependency for rapid development and here’s why: Every developer wants to be productive and in many cases the speed with which the developer is able to move forward while adding features or fixing bugs is directly proportional to the frequency of the “edit-compile-run” cycle. […]
Spring boot Actuator Example – Integration with rest service
What is Spring Boot Actuator ? Spring Boot Actuator is a spring feature which allows any web-app developer to add features to their web-services and applications to make them production-ready, such as monitoring and administration. The actuator is available as a library which attaches on-the-fly and provides tools to manage a web app by monitoring […]
Flyweight Design Pattern
Flyweight design pattern falls under the structural design pattern category. Sometimes, our applications hit slow performances. This can be due to various reasons. Instantiating many amounts of heavy objects can be one of the very common reasons for the low system performance. This can be rectified by the flyweight pattern successfully. Flyweight pattern introduces a […]
Java 8 – Lambda expressions
Let us look at lambda expressions, which is one of the most important features introduced in java 8. Before we look at lambda expressions, let us first understand the functional interfaces and anonymous classes. What is functional interface? Functional interface means an interface that has exactly one abstract method. They have only one functionality to […]
REST API Interview Questions
Here is a list of top 15 REST API interview questions and answers. These questions would provide you with basic information about both simple and advanced topics. What is REST API ? REpresentational State Transfer, or REST for short, is an architectural style for building distributed, client-server systems. By providing a small set of useful […]
Mock Interviews for Java developers
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Proxy Design Pattern with examples
Introduction to Proxy Pattern Proxy design pattern falls under the structural design pattern category and it is one of the most frequently used pattern in software development. This pattern helps to control the usage and access behaviours of connected resources. A separate object called ‘proxy’ helps to build the connection between the client and the […]
RESTFul webservices with Jersey And Spring
JAX-RS and Jersey JAX-RS, is the “Java™ API for RESTful Web Services (JAX-RS)”. Documented in JSR 311 & JSR 339 it specifies a bunch of interfaces and annotations that can be used to define RESTful Webservices in java. Jersey is a reference implementation of JAX-RS Spec. In addition to implementing the JSR 331 and 339, […]