However, it is not uncommon for RPC designs to also select a couple of ideas from HTTP while maintaining the RPC model. This architectural model tends to follow the HTTP protocol. When using REST APIs, the response from the back-end data is passed to the clients (or users) through the JSON or XML messaging format. Like a REST API, RPC also establishes the rules of interaction and how a user can submit "calls" (requests) to invoke methods that communicate and interact with the service. RPC supports remote procedure calls both in local and distributed environments. Nonetheless, the method of submitting a call with RPC API is found in the URL. While the server is processing this call, the client is blocked, and the internal message passing within servers is hidden.įurther, RPC allows the client to request a function in a particular format and receive the response in the exact same format. ![]() Once the server receives the request, it sends the response back to the client. ![]() The requesting server (in other words, the client) requests a message that is translated by the RPC and sent to another server. In this article, we will focus on the first two. However, there are three main models when building an API: RPC (Remote Procedure Call), REST (Representational State Transfer), and GraphQL. The most used architectural style is the REST API. In other words, APIs allow all the services that are integrated into a microservice application to connect and communicate. ![]() The component services that are part of the microservices architecture communicate and interact with each other through APIs. On the other hand, a microservice architecture comprises several smaller services that communicate with each other using protocols like HTTP. On the one hand, in a monolithic application, all the project's functionalities are included in a single unit, more precisely, in a single codebase. This article compares gRPC (Google Remote Procedure Call) and REST (Representational State Transfer) because they represent the two most popular architectural styles when creating APIs. This process happens thanks to APIs.Īn API specifies the types of requests that one application (web page or mobile app) can make to another and further establishes: how to make those requests which data formats to use and the practices that users have to follow. In turn, the server retrieves the data, interprets it, and then, once the required actions are executed, it sends a response back to us with the information on our interface. We go to the hotel booking page on our laptop, and that page - which is connected to the Internet - sends data (our request) to a server. An API is responsible for delivering a response from a user to a system, which in turn is sent back from the system to the user. These interfaces serve as a software intermediary that establishes specific determinations and rules for applications to interact and talk to each other. ![]() Table of ContentsĪPIs stand for Application Programming Interfaces. Considering their comparison, we will finally analyze when to use one architectural type or the other. Before we move on to their differences, we will first explain what an API is and why it is essential for microservices infrastructures.Īfterward, we will describe how RPC is the base for gRPC and consider the critical aspects of differentiation between gRPC and REST APIs. Facebook LinkedinĬurious to find out whether gRPC is the future? This article aims to explain two architectural APIs styles: REST and gRPC.
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