munandersingh, Author at Knoldus Blogs

Spring Interceptors: How to use them correctly?

February 14, 2020February 14, 2020Java, Reactive Architecture, Tech Blogsspring-boot, spring-interceptors

Reading Time: 2 minutes Hi folks! we’ll focus on understanding the Spring Interceptors and how to use it correctly. What is Spring interceptors When a request is sent to spring controller, it will have to pass through Spring Interceptors (0 or more) before being processed by Controller. Spring Interceptor is only applied to requests that are sending to a Controller. Spring Interceptor – HandlerInterceptor preHandle(): This method is used to intercept the request before Continue Reading

Why gRPC for Inter-Microservice Communication.

January 28, 2020January 28, 2020Microservices, Tech BlogsGRPC, gRPV v/s REST, why grpc

Reading Time: 3 minutes Hi folks! In this blog we will understand why one should use gRPC for inter-service communication over other RESTful services. What is gRPC? It is a high performance, open source universal RPC Framework. In simple words, it enables the server and client applications to communicate transparently and build connected systems. Google developed gRPC and made available open-source. With it, a customer can directly call methods Continue Reading

Compile protocol buffers using maven

January 23, 2020January 23, 2020Java#java, maven, Protocol Buffers

Reading Time: 3 minutes Hi Folks! As part of this blog, we will explore how we can compile protocol buffers using maven. We assume the reader has the basic idea about protocol buffers and maven. Google developed Protocol Buffers for use in their internal services. It is a binary encoding format that allows you to specify a schema for your data using a specification language, like so: The snippet defines the Continue Reading

Different ways of Handling Exceptions in CompletableFutures

January 10, 2020January 10, 2020Functional Programming, JavaCompletableFuture, Exception Handling, Java8

Reading Time: 3 minutes Hi Folks! As part of this blog, we will explore how we can handle exception in the different computing stages when we use CompletableFuture. We assume the read has the basic idea of the CompletableFuture. Nonethless, will start with the basic introduction of the CompletableFuture. What is CompletableFuture A CompletableFuture is used for asynchronous programming which was introduced as an improvement of the java Future API in Continue Reading

An Overview of the Stored Procedures in PostgreSQL

October 31, 2019October 31, 2019Database#java, postgreSQL, Procedures

Reading Time: 4 minutes As you may know in all the versions up to PostgreSQL 10, it was not possible to create a procedure in PostgreSQL. In PostgreSQL11, PROCEDURE was added as a new schema object which is a similar object to FUNCTION, but without a return value. Over the years many people were anxious to have the functionality and it was finally added in PostgreSQL. Traditionally, PostgreSQL has provided all Continue Reading

Encryption with PBKDF2

October 3, 2019October 3, 2019Java, Security

Reading Time: 4 minutes Passwords can be the most valuable data to an attacker because stolen passwords can provide attackers the ability to bypass most of the security perimeters that exists in the system. Since lot of people use the same password in several other systems, one system compromise can affect the security of other systems too. This is where we can use encryption as a solution for theses Continue Reading