Java - Just chatterbox

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

Java

Ehcache: Java Based Cache in Spring Boot

Most of the time, when we need to retrieve the same piece of data repeatedly from a data store, we generally try to cache the data to an in-memory cache. One such library we use when our data is lightweight is Ehcache. In this article, we shall see how to

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

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

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

Big Data

JSOUP for web scraping in java

The Web Scraping is process of harvesting the the content from website's URL, As we are in world of Data driven decision making web scraping plays major role collecting data from public channel and processing content could help to analyse and fuel the the decision. so lets begin with one

Java

Another Way for Spring Request interceptors or writing an middle-ware: SpringSandwich

We usually try to Intercept HTTP requests for logging purpose or Authorisation or create an trigger for certain activity based action, typical usage is always Logging or Authorisation.While i was try to implement request logging i found a beautiful plugin called SpringSandwich. As website states its an Annoted, type-safe

Java

Intro : Getting Started with Kafka producer & consumer On Spring boot

We all know spring boot is an excellent framework where we can write web application, scheduler,command line runner most of the java based application are written in spring boot these days for simplicity and its features also readily available components we and directly include in its dependency. Also when

Java

AWS S3 with Spring Boot: Uploading and downloading file to Buckets

So if are reading this Article means your a developer and your familiar with spring boot or AWS S3, just for SEO purpose i will brief both,so you can skip the introduction part and jump into coding part.As a developer Spring boot has become my vital Framework and

Java

Spring Boot Command Line Runner Example.

Do want to look cool, and pretend to be some hacker just on terminal printing some random this,Then you can use this command line runner :-P, jokes apart, Usually when we need to work on some Shell Script which is very complicated or you perform certain repeated task clearing

Spring Boot

Exception handling in spring boot REST APIs

As we know spring boot community is growing and lot of legacy spring project is getting migrated towards spring boot, and always when we start and application we always search for better error handling ways, usually when we are java developer we tend to use try catch block to throw

Java

Spring Boot Shell : CLI app to execute your commands

A CLI command line program which take string argument from keyboard and executes the program based on input, Assume you are write an migration tool you have to copy contents of your folder to another, or you have remove temp files, convert one file format to another, or resize the

Java

Getting Started with spring boot scheduler `@Scheduled`.

A lot of times we need to run couple CORN or scheduled scripts, if your spring boot developer without having much hassle we can start Spring boot application and create task or run a scheduled jobs, so lets begin with small proof of concept to start Spring Scheduler and running

Database

Spring Boot Getting Started with Google Data Store.

Google Data Store also know Firebase Data Store is a No-SQL data base which store data as documents like MongoDB its similar like Amazon's Dynamo DB or Azure Cosmos DB provided with other cloud competitor. Spring Boot provides starter package for Google data Store so writing and saving Entities is

Java

Getting Started and Deploying Spring Boot application on Google App Engine (GAE)

So spring boot is versatile web framework and pretty much every java developer these days use this and Google app engine or GAE is a Platform as a Service and cloud computing platform for developing and hosting web applications. So using GAE will eliminate infrastructure management by auto scaling when