Web Services

Monkey patching in NodeJS

Reading Time: 3 minutes Hey guys, I am back with another blog in my series of blogs on mocking in nodeJS, so if you have read my last blog, in which we looked over how we can use sinon for testing in nodeJS to effectively mock and stub behaviours, so in this blog we would look over the concept of monkey patching to make things more testable, so let’s Continue Reading

Spies and Stubs in NodeJS

Reading Time: 3 minutes Hi folks, my last two blogs we discussed about how we can use monkey-patching to test complex code logic which could be difficult to test if it is not used, along with that we also looked over how can stub or mock behaviours of our dependencies using sinon, in this blog we would be exploring more utilities provided by sinon i.e; Spies and Stubs. Spies Continue Reading

Passing query parameters through your WebClient

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.

Spring: Reactive programming in Java

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

Integrating Lagom Service Discovery with Kubernetes

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

Custom ErrorHandlers and Lagom

Reading Time: 3 minutes Hello everyone, it’s been quite a while now since I started working on Lagom(java) and it was only recently when I came across a scenario wherein I was required to override the ErrorHandler provided by Play in my Lagom microservice. As you all already know that Lagom is built on top of Play and Akka, so there will be times when we’ll be required to Continue Reading

Introduction to Consul (Part-1)

Reading Time: 4 minutes In this blog, we are going to discuss an amazing tool used for service discovery and configuring services using Consul. Hold on a second!! There must be some questions in your mind: Aren’t there so many tools already doing that and are being used by everyone? Wow !! I have been using tools like Zookeeper for service discovery, And they are pretty good. Now, do Continue Reading

Fault Handling in Apigee

Reading Time: 4 minutes Hi all, In my previous blogs on APIGEE we: Went through the basic introduction of Apigee. Went through the main policies and how to apply them on our proxies. Saw how to extract out a header, extract a list of values out of a header. If you like you can go through those once again here: Basics of Apigee. click here Playing with Policies. click here Extract the Continue Reading

Do you know Akka-HTTP Cache?

Reading Time: 3 minutes Today we are to going to talk about a very important aspect of reactive web applications development. It’s not from the alien world, we always talk about it but we rarely want to deal with it. It’s Cache. In today’s mammoth scalable architecture, we are mostly surrounded by big design issues and somewhere here and there we neglect benefits of using a very useful concept Continue Reading

Create AWS Lambda with ease

Reading Time: 3 minutes Hi readers, this is my second blog on AWS lambda, I covered the basics in my previous blogs. Now we will focus on the implementation part. Before starting, please keep a check on these things: Prerequisite Setup your AWS account, click here  Understanding what AWS Lambda is? click here All set let’s start.