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Author Archives: Yatin

An experience full-stack engineer well versed with Core Java, Spring/Springboot, MVC, Security, AOP, Frontend (Angular & React), and cloud technologies (such as AWS, GCP, Jenkins, Docker, K8).

GC Overhead Limit Exceeded

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Hello. In this tutorial, we will understand the GC Overhead Limit Exceeded error in the Java programming language. 1. Introduction Out of memory error in java is a virtual machine error thrown by the java virtual machine when the resources are exhausted. In other words, the error prevails when the virtual machine has spent hours performing the garbage collection but has ...

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Google authentication Nodejs and Passport

Hello. In this tutorial, we will understand and implement the google sign-in integration with the nodejs application using passport and passport-google-oauth2 modules. 1. Introduction Passport.js is an authentication middleware designed for Nodejs. passport-local uses the passport strategy for authenticating with a username and password. The module helps to authenticate using a username and password in the nodejs applications. If you ...

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Nodejs Nodemailer example

Hello. In this tutorial, we will understand the nodemailer module in a simple nodejs application. We will set up a fake smtp server (e.g. smtp4dev) for localhost development and understand the package implementation. smtp4dev is an open-source service that emulates an smtp email server for email testing and debugging purposes. 1. Introduction Nodemailer is an npm module used for sending ...

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Query in graphql

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Hello readers. In this tutorial, we will understand and implement the query in graphql. 1. Introduction GraphQL is an API syntax that defines how to fetch data from one or more databases. It was developed by Facebook to optimize the RESTful api calls. It is a data query and manipulation language for api’s. It is faster, simple, and easier to ...

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Mutations in graphql

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Hello readers. In this tutorial, we will understand and implement mutations in graphql. 1. Introduction GraphQL is an API syntax that defines how to fetch data from one or more databases. It was developed by Facebook to optimize the RESTful API calls. It is a data query and manipulation language for API’s. It is faster, simple, and easier to implement ...

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Expressjs and Knexjs sql query builder

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Hello readers. In this tutorial, we will understand the knexjs sql builder library in expressjs application and perform some crud operations. 1. Introduction knex sql builder library for javascript that provides an easy interface to access a database and perform all the related operations. It supports multiple database engines like Mysql, Postgresql, SQLite, Oracle, and many more. It supports features ...

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Postgres and Graphql

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Hello readers. In this tutorial, we will bring in the postgres (running as a Docker container) to integrate with graphql and implement the CRUD operations. The application will expose different endpoints with the help of the apollo server. 1. Introduction GraphQL is an API syntax that defines how to fetch data from one or more databases. It was developed by ...

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Apollo server in express js

Hello readers. In this tutorial, we will implement the Apollo server in graphql and express js. Apollo server is an open-source graphql server and works with many nodejs http frameworks or can run its inbuilt express server. 1. Introduction GraphQL is an API syntax that defines how to fetch data from one or more databases. It was developed by Facebook ...

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Express-js and graphql

Hello readers. In this tutorial, we will implement GraphQL with express-js. 1. Introduction GraphQL is an API syntax that defines how to fetch data from one or more databases. It was developed by Facebook to optimize the RESTful api calls. It is a data query and manipulation language for api’s. It is faster, simple, and easier to implement It follows ...

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Nodejs and graphql

Hello readers. In this tutorial, we will implement GraphQL with nodejs and focus on creating a hello world application. 1. Introduction GraphQL is an API syntax that defines how to fetch data from one or more databases. It was developed by Facebook to optimize the RESTful API calls. It is a data query and manipulation language for API’s. It is ...

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