Java

A peek into REST Assured.

Reading Time: 3 minutes Hi folks, In this blog, we will take a peek into the REST Assured and will try to understand the basic architecture of it. Moreover, we will try to have a brief understanding of writing a basic test script as well. So, let’s get going. What is Rest Assured? It won’t be an overstatement if we say that APIs are playing a very important role Continue Reading

Stream your data using Kinesis data stream

Reading Time: 3 minutes We live in a world driven by data and every second we are processing a large amount of data, using it, analysing it, and transforming it. Data is very essential for businesses these days. Therefore the need for handling the Dynamically generating data is important. As the number, variety, and velocity of data sources grow, new architectures and technologies are needed. This is where the need Continue Reading

Handling failed SQS Events using AWS Dead Letter Queue(DLQ)

Reading Time: 3 minutes Amazon SQS is an amazing simple queuing service which offers us a secure, durable hosted queue which lets us integrate and decouple distributed software component. One of the exciting features that SQS provides us with is the support of dead letter queue. Whenever we are using SQS for queuing messages for our services there may be times that our message gets corrupted or for some Continue Reading

Cloudstate with Java (Part 2): Getting Started with Java

Reading Time: 2 minutes In our last blog, we talked about the various prerequisites needed to implement cloudstate with Java. In this blog we will look into few more points to keep in mind while implementing cloudstate using Java. So lets go ahead! The Protobuf files In our previous blog we read about the Protoc compiler which is required to compile gRPC protobuf descriptors. We also learned that this Continue Reading

Cloudstate with Java (Part 1): Getting Started with Java

Reading Time: 2 minutes In today’s world, serverless computing has evolved a lot. And with this concept of serverless computing, Lightbend has come up with an amazing framework known as Cloudstate.  Cloudstate is a specification, protocol, and reference implementation for providing distributed state management patterns suitable for Serverless computing. – cloudstate.io To know more about Cloudstate please go through the blog series: Cloudstate – What is it ? Cloudstate Continue Reading

Java 11: Lambda Expression and String functions

Reading Time: 3 minutes Java 11 comes up with a lot of new features, thus easing out the life of a programmer. In this blog, I will discuss some of them. First and foremost great news about java 11, we need not to compile the java source file using command javac. A java program can now easily run using java command as the compilation happens implicitly. Lambda Parameter Syntax: Continue Reading

Querying Array of String using JPA Specification

Reading Time: 2 minutes Writing dynamic queries using JPA Specification could be a hard to understand and implement but lets make it simple and easy to understand! To query array of string in postgreSQL , we might use a query like this : select * from employee where ARRAY_TO_STRING(keywords, ‘,’) LIKE ‘%lunch%’; To use specification for querying array string datatype ,we will have to Define a custom dialect to Continue Reading

Flink: Join two Data Streams

Reading Time: 3 minutes Apache Flink offers rich sources of API and operators which makes Flink application developers productive in terms of dealing with the multiple data streams. Flink provides many multi streams operations like Union, Join, and so on. In this blog, we will explore the Window Join operator in Flink with an example. It joins two data streams on a given key and a common window. Let say we have one stream which contains salary information of all Continue Reading