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Spring Boot Rest API deployed in AWS Lambda (Serverless) Git lab CI/CD

Just to begin AWS Lambda is server less architecture, which allows you to run the code without managing the server and cost is pay per use, usually its based on number of invocation and execution time. Usually lambda is preferred for small task or to have platform specific trigger. But

Spring Boot

Adding transaction id or trace Id for each request in spring boot for tracing the log easily.

As most of us use spring boot as our got to framework for web development. And Also we are rapidly moving towards the Micro Services, One concern is to effectively monitor and trace the Application's Log. So In this distributed era we adapted to have Transaction Id/Trace ID to

AWS

AWS S3 & Micronaut: File upload and download using Java

I started learning new framework called Micronaut, Micronaut is lightweight Java web framework, Which is cloud native in nature which support Java, Groovy and Kotlin and main advantage of the micronut its light weight, has low memory footprint and fast, one of the way it achieve its Fast nature and

Java

File Upload And Download Inside Micronaut Http controller Java.

I am learning new framework called Micronaut. And I wanted to know how to upload the file and modify the configuration to allow multipart data, So I began googling and consolidate my learning in to single blog. This article helps you to upload a file and download a file from

Micronaut

Sending and Receive Message in AWS SQS Using Micronaut Java

Amazon has SQS is fully managed Message Queuing Service, This is designed to ease the exchanging messages between two systems. And this might helps to decouple the the system. For example to trigger another lambda function which preforms some clean up task in the background or Scrape some data. reason

Micronaut

Enabling CORS in Micronaut using Filters

For a beginner CORS is a cross site resource sharing, Means when the request is sent from a browser, communication should happen with in the same domain. But now we are disturbing almost everything in this era, So there is always a chance that we might Host JS in one

Java

Custom Annotation To Handle Authorisation In Micronaut AOP Tutorial

Overview:Creating custom annotationCreating component in MicronautCreation a configuration and middleware(Interceptor) in MicronautBasic of Aspect and usage in MicronautMicronaut is the web framework, Its features similar to spring boot also this framework is light weight, low memory foot print, and quick start up time, as we know solve cold

Cloud

AWS Lambda APIs using Micronaut along with basic CI & CD (Gitlab CI) steps.

Just to begin AWS Lambda is server less architecture, which allows you to run the code without managing the server and cost is pay per use, usually its based on number of invocation and execution time. Usually lambda is preferred for small task or to have platform specific trigger. But

Java

Spring Boot: Uploading and download a file from GCP Storage (Google Cloud Storage)

Hello fellow developer, if you have landed on this page by search that means my SEO is working and google official documentation is not yet updated for the new approach. or if you have visited just to learn let me add few more details about GCP and spring boot. Google

Android

Install Flutter on Windows 10

Flutter is a hybrid application development framework developed and maintained by Google. Last time when I wrote an installation guide, Flutter only supported iOS and Android application. But now Flutter supports Web apps and Desktops Apps supporting Windows, Linux and Mac platform, Btw these features are currently in beta and

Flutter

A simple way to upload a file to server from the flutter web app.

There might be a lot of articles about the same topic of uploading the file to a server from a flutter web app. But the approach I am taking is to use readily available plugins can concentrate on uploading the file by avoiding a lot of boilerplate code. Also if

Spring Boot

Spring boot: uploading and downloading file Azure Blob Store using rest API

If you have landed on this page means either your working with spring boot and trying to upload a file to Azure blob storage. so we know spring boot has gained popularity for its simple approach to bootstrap an application in very less time, Also Azure is gaining a lot

Spring Boot

Continuous deployment of spring boot Apps on Azure App service using GIT lab CI

Continuous deployment is an automated process of releasing production code to the desired infrastructure, Only after Continuous Integration pipelines are satisfied. CI (Continuous Integration) is making sure every piece of code is tested & validated in an automated fashion whenever code pushed to the shared repository. The process of CI

Scala

Factory Pattern In Scala

A Factory pattern or Factory method pattern is very common design pattern used in software development,its is classified as creational pattern. which solves the problem of creating the instance of the class without actually specifying exact class need to be created.this pattern is part of Gang of four

Scala

Scala build tools (sbt) : Getting started for testing and building

As we know Scala as language is getting popular in data science or general programming field, for its functional programming traits as well object oriented behaviour also Scala runs on JVM so we can mix Scala code in java or java code with Scala project also lot of plugin or

Scala

Difference between object and class in Scala.

Objectso in scala object is a singleton instance of the class, lets explain with small snippet. object test { def addPlusOne(a:Int) = a+1; } So when your calling the function instance is already created you can just use like static functions of class in java i.e `test.addPlusOne(2)

Big Data

Basic encoding : label encoding and one hot encoding in Scala with Apache Spark

If your starting with machine learning, after cleaning the data you end up with Normalising data, this is where encoding techniques comes in handy. there are lot of data encoding techniques but we hear lot about one hot encoding and label encoding a lot. also adaption rate for Scala programming

Java

Spring boot: uploading and downloading file from Minio object store

If you have landed on this page means either your working with spring boot and trying to upload an file to a privately hosted minio object store server. so we know spring boot has gained popularity for its simple approach to bootstrap an application in very less time, Also minio

Big Data

MINIO: Getting Started With Ubuntu 18.04

Minio is another object store just like AWS S3, This is self hosted so easily can be used in private cloud. and it is open source so its absolute free use and modify. this one of the fastest growing self managed object store out there. so when it comes to

Tutorial

Flyweight Pattern in java.

Flyweight pattern is categorised as structural pattern,Which is used to reduce number of object creations by using existing similar objects which in turn helps in reducing the memory foot print and increasing the performance of an application. lets take some real world example where you need to print employee

Java

Standardise the response of REST API in spring boot (Spring boot's ResponseBodyAdvice)

As we know know Just like Captain america's Civil War fight, so in development war between front end developers vs back end is hard to explain, usual complaint for any screw ups is API response is not consistent, this will be both burden to FE devs and BE developers, Which

Data Structure

Single Linked List implementation in Scala

Linked list is linear data structure where elements are not sorted and there memory locations are not in sequence.So liked list has Struct called Node which hold data and reference to the next element. Linked listAs shown in the above diagram linked list contain's node where first node will

Data Science

Install `jupyter` Note book for Scala on ubuntu 18.04 LTS

So If you're a data scientist or an enthusiast you might have come across jupyter Note book, so juypter is an open source web application which helps you to run live code, plot visualisation charts,brief text narration of written code, we generally use jupyter note book to work on

Apache Spark

Basic statistics concepts for machine learning in Scala spark

Before applying some distribution algorithm or probability density function or probability mass function, we need to understand some basic concepts of statistics these concepts might be though in our school ,we shall start by brushing up the concepts and implement those in Scala spark,Just for an overview i will

Big Data

Identifying 3 basic Flavours of data for processing.

Before stepping into data processing we have to identify the what's flavour of the data. before applying fancy algorithm or basic statistics like mean median or mode, so our results wont deviated, so basically we can divide data in three parts. 1) Numerical.Numerical data represented in digits which might