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Passing query parameters through your WebClient

Prashant SharmaAugust 7, 2019Java, Microservices, Non-Blocking, Reactive Programming, Web, Web Application, Web Services#java, Asynchronous, Reactive, spring-boot, unmanaged service, WebApplication, WebClient, Webflux

Reading Time: 5 minutes We can use spring-boot:webflux’s WebClient to invoke a third-party service from within our spring boot application. This is asynchronous and reactive method supplied by spring for invoking of unmanaged services. We also saw how we can pass query params when invoking a 3rd party service and which case to chose with our requirements. Be cautious with what you are using and always document what you want and what you created so that things like these can be caught early during the development phase.

RAP: The journey from a learning project to a useful product

Rishi KhandelwalAugust 5, 2019August 6, 2019Functional Programming, Lagom, Microservices, Reactive Application, Reactive Programming, Scala, Web Application

Reading Time: 4 minutes A few months back, I was working on interesting customer engagement. Lagom was getting popularity, therefore, I and my few team members wanted to explore it to see if it would suit our needs. Just reading its documentation was not enough to get the proper practical hands-on. So we thought to do a project. The idea was that we should not build a dummy project, Continue Reading

Getting Started with Vault

Nancy JainJuly 15, 2019July 16, 2019API's, Other, Scala, software, Tutorial, Web, Web Application#java, credential management, HasiCorp, Introduction, learning, opensource, programming, scala, Secret management, technology, vault, vault api, vault CLI, vault dev server

Reading Time: 3 minutes HashiCorp Vault is a secret management tool which provides a secure and reliable way to store secrets like passwords, access token, secret API key etc.

There are applications that need to interact with third party services and for that it needs various credentials. There are scenarios in which we need different credentials to process different requests. So, where will you store them? Can you really hard-code them and publish them to your sub-versioning tool? Ofcourse not. This is not a recommendable approach.

Spring Boot WebClient and it’s testing

Deepak MehraJuly 9, 2019July 17, 2019Java, Microservices, Non-Blocking, Reactive Application, Reactive Programming, Scala, Web, Web Application, Web Servicesprogramming, Reactive Programming, Spring, springboot

Reading Time: 3 minutes This post talks about the Spring5’s WebClient feature to make calls to external APIs. Also, how unit test case are written for SpringBoot Webclient.

Getting started with Svelte

RudarJune 27, 2019June 27, 2019JavaScript, User Interface (UI), Web Application

Reading Time: 2 minutes Svelte is a lightweight modern JavaScript library (4.57KB minified) intended for use on projects where legacy browser support is not necessary. It uses modern JavaScript (querySelectorAll, classList, matchesSelector) to help make it as lightweight as possible and therefore only works on the latest version of modern browsers E.g. Chrome, Firefox, Opera, IE10+. Svelte is used to develop cybernetically enhanced web apps. Why Svelte? Svelte is Continue Reading

API Security in Apigee: Introduction to OAuth 2.0

Charmy GargJune 18, 2019June 18, 2019API's, Scala, Security Controls, Web ApplicationAccessToken, API Security, Apigee, OAuth Introduction, Oauth2, OAuth2.0 Flow, RefreshToken

Reading Time: 3 minutes In today’s world of web APIs How you can control access to your APIs from malicious attacks? How you can build a trustworthy system?

Spring-Webflux: Testing your Router Functions with WebTestClient

Vinisha SharmaJune 10, 2019June 10, 2019API's, Functional Programming, Java, Quality Assessment (QA), Reactive Application, Reactive Programming, Testing, Web Application

Reading Time: 3 minutes I recently started working on the functional approach of Spring Boot Webflux. You can explore it more on my previous blog on Spring Boot Webflux. It is a new concept and you may not find many useful blogs on it unlike for annotation based controllers. However, going with some trial and error, I have come out with how one can test its router functions along Continue Reading

Spring: Reactive programming in Java

Rishi KhandelwalMay 25, 2019May 27, 2019API's, Java, Microservices, Reactive Application, Reactive Programming, Web Application, Web Services

Reading Time: 3 minutes Reactive programming is a programming paradigm that promotes an asynchronous, non-blocking, event-driven approach to data processing. Reactive programming involves modeling data and events as observable data streams and implementing data processing routines to react to the changes in those streams. In the reactive style of programming, we make a request for the resource and start performing other things. When the data is available, we get Continue Reading

REST Assured: A beginner’s guide for REST API testing.

Mukesh KumarMay 9, 2019May 17, 2019Java, Microservices, Testing, Web Serviceslearning, REST, REST API Testing, technology, testing skills

Reading Time: 3 minutes Automated Rest services testing using REST Assured library. Introductory guide for REST Assured library. basic understanding of its use and requirement.

Integrating Lagom Service Discovery with Kubernetes

Jatin DemlaApril 27, 2019June 19, 2019Akka, cluster, DevOps, Docker, Java, Lagom, Microservices, Reactive Application, Reactive Programming, Scala, Web, Web Application, Web Serviceskubernetes

Reading Time: 3 minutes Consider a situation where a microservice is deployed on multiple pods and on condition one pod got restarted with any of the failure reason makes unreachable and at the same time interdependent services are registers its IP for communication. Now, since other pods of the service are alive but not able to communicate makes the communication failure as well as making the failure of every Continue Reading

API Design Best Practices

Deepak MehraMarch 31, 2019March 31, 2019API's, Architecture, Mobile Development, Scala, Web, Web ApplicationDesign, standard, technology, webdesign

Reading Time: 6 minutes Ever wondered if we have anything like best practices for designing our APIs, if not just give it a quick thought something will pop up, and if it was a yes let’s talk about it in detail. Yes, you heard me right, today we are going to talk about best practices for designing APIs which will help the developer to increase his/her productivity and success Continue Reading

Monitor a Kafka stream application with Graphite-Grafana using JMX metrics

Rishi KhandelwalMarch 5, 2019Apache Kafka, Architecture, Big Data and Fast Data, cluster, DCOS, DevOps, Docker, Java, Messages, Microservices, Non-Blocking, Reactive Programming, Scala, Web

Reading Time: 5 minutes A few days back, we got the requirement that we need to monitor a Kafka stream application using JMX metrics. We looked for the solution and reached to the conclusion which we will discuss in this blog. I will try to explain each and every component of the solution along with the setup and the integration part of the whole system. Proposed solution: Service (application) exposes Continue Reading

DOM Manipulation Using D3.js

Nitin AroraDecember 4, 2018December 4, 2018Angular, Angular 6, Angular Material, AngularJS, AngularJs2.0, D3.js, HTML, JavaScript, Node.js, Web Applicationhtml, Introduction, Javascript, learning, technology, webdesign

Reading Time: 4 minutes D3 (Data-Driven Documents or D3.js) is a JavaScript library for visualizing data using web standards. It is an open-source JavaScript library developed by Mike Bostock to create custom interactive data visualizations in the web browser using SVG, HTML, and CSS. giving you the full capabilities of modern browsers and the freedom to design the right visual interface for your data.

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