In the olden days, a software application was built as a large monolith, and It’s still being done. However, in recent times microservices architecture has become a popular choice for developing software applications. In a microservice architecture, the microservices often need to communicate with each other. …

While REST is the de facto standard for public API, gRPC is increasingly becoming one of the most popular choices for inter-process microservices communication. gRPC is a strongly typed, polyglot, efficient, fast RPC framework that supports unary (request and reply) and streaming (client and server-side) communication patterns. The gRPC client…

One important design principle of microservices architecture is database per service pattern. This pattern helps us to keep services loosely coupled so that they can be developed, deployed, and scaled independently. …

In the context of any software application, a workflow (also known as a business process) is a repeatable sequence of steps to fulfil a certain business use case. Typically, a workflow can be long-running (from seconds to days) and involve calls to unreliable external systems (such as the payment…

A GraphQL directive is one of the most powerful tools to customize and add new functionality to the GraphQL API. It can support many use cases such as access control, input validation, caching, etc. Like queries and mutation, a GraphQL directive is defined in GraphQL Schema Definition Language (SDL) and…

In earlier articles, we talked about GraphQL queries. But, GraphQL is not just about queries. Like any other API platform, a GraphQL service also needs to provide a way to manipulate data. This is where GraphQL mutation comes into the picture. In theory, we can use GraphQL queries to modify…

GraphQL promises to solve some major shortcomings associated with REST API, namely over-fetching and under-fetching. But, GraphQL is also prone to one problem, commonly known as N + 1 problem. In short, if the GraphQL service is not implemented correctly, it can cause significant latency in the API calls. Not…

In the last article Getting started with Spring Boot GraphQL service, we discussed features of GraphQL and its implementation in Spring for GraphQL using low-level APIs of GraphQL Java. While low-level GraphQL Java implementation is fine for understanding the concept, you’ll mostly use higher-level abstraction provided by Spring. In this…

Facebook developed GraphQL in 2012 to solve its problem of mobile communication. Since it was open-sourced in 2015, it has been adopted by companies like Twitter, Shopify, Lyft, Airbnb, Github, Yelp, and many more. There is no doubt that GraphQL adoption is on the rise. The State of JavaScript 2020…