Apache Kafka Introductory Tutorial – Set up your first Kafka Producer and Consumer

PrerequisiteA basic understanding about Apache Kafka. Please go through the introduction once, should you need it.InstallationDownload the Kafka from here.Untar the tar file that is downloaded.tar -xzf kafka_2.11-2.1.0.tgzRun The Servercd kafka_2.11-2.1.0Start the zookeeper firstbin/zookeeper-server-start.sh config/zookeeper.propertiesZookeeper would be running at 2181 port. You can check that in the following log:[2018-12-25 14:32:23,634] INFO binding to port Continue Reading →


Introduction to Apache Kafka Concepts

What is Apache Kafka? Apache Kafka is a distributed streaming platform. This essentially means that Kafka has following capabilities: Publish and subscribe to the stream of records just like how message queue (e.g. RabbitMQ) works Store streams of records for specified time. Kakfa is not a replacement for database or a logging platform. However, kafka... Continue Reading →

Hello World Tutorial App Using React Native For Android/ios

Installation Please install node.js if you haven't already done. You can check if you have node already installed by using following command: node -v brew install node Use brew commands given above to install node. Create First App npm install -g create-react-native-app Create React Native App makes it significantly easier to get started with a... Continue Reading →

REST API – 4 Best Practices

1. Statelessness In a very simple word, each request should be sufficient in itself to be understood by the server. In other words, the action to a request should not depend on information provided by any prior request. Each request should be an atomic operation. But why statelessness is a constraint? Because It enables us... Continue Reading →

Dropwizard Tutorial : HTML Page Using Freemarker

Prerequisite Before you start this, Its good to follow the following articles. Running Rest API using Dropwizard Reading From Database Using Dropwizard  Writing To Database Using Dropwizard I will assume that your dropwizard project is running. Dependency Add dependency of dropwizard-freemarker-views in your pom.xml Your pom.xml should look like this: https://gist.github.com/rohitsingh20122992/bc05fad912367fc094b3d86f0dbf1943 Freemarker Template Language Apache... Continue Reading →

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 →

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 →

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