Dropwizard : Write Data Into Database Using Hibernate

Please follow the first two part of the tutorial before starting this: Introduction To Dropwizard Read Data From Database Using Dropwizard Modify InfoDao To Persist Data Add a method to persist data https://gist.github.com/rohitsingh20122992/804fcb8d8278697b9bad67dc4d6eb596 Add POST API to store the info https://gist.github.com/rohitsingh20122992/ba92da47d24be1cbff32ea19106e92b9 Test Your API Run your project. Test using postman or any other rest client.... Continue Reading →

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Dropwizard – Tutorial to write APIs to read/write from database using hibernate

Please go through the first part of this tutorial to set up your dropwizard project. For this project, we will assume you have a working dropwizard project. Add dependency to your pom.xml Please add dependency of hibernate and mySQL-connector to your pom.xml https://gist.github.com/rohitsingh20122992/b4256af30b3cecaf64e0454460c41d72 Create Info Table in MySql https://gist.github.com/rohitsingh20122992/eda65377e68f280758cea3ab54347486 Add some content to your table.... Continue Reading →

REST APIs using Dropwizard – Introductory Tutorial

Dropwizard is a popular java framework for restful service. It provides out of the box support for configuration, application metrics, logging and operational tools so the developers focus more on writing business logic and not on set ups. Agenda This tutorial should help you set up your dropwizard project and few APIs. Let's start! Create... Continue Reading →

Design Pattern – The Singleton Pattern

Definition Sorry about that whisky image. I, too, love click baits 😉 The singleton pattern is a software design pattern that restricts the instantiation of a class to one object. Singleton pattern is a convention for ensuring one and only one object is instantiated for a given class. Usage Places where only one object is... Continue Reading →

Network Flows – Maximum Flow

Network flows is a class of problems dealing with directed graphs and the properties of functions defined on the graph. Flow Flow represents any element which does not disappear while traveling through the edges of the directed graph. Flow can be current in the electric network, data packets in case of the computer network and... Continue Reading →

Binary Heap – Data Structure

Usage In Heapsort In Priority Queue Not the garbage collector storage (as provided by JVM) Definition A binary Heap is an array object. We can view that array object as a near complete binary tree. A binary tree is said to be a complete binary tree when all the nodes except possibly for the leaves... Continue Reading →

A Tutorial on JVM – Run-Time Data Areas

Java code comprise of class and variable. Class and Variable come with different scope(private/public/static). All this takes memory. JVM has been given responsibility to run the java code. JVM gives memory for class/variables. But how does JVM manages memory? Let's imagine JVM memory as big box as it is shown in the picture below. We will... Continue Reading →

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