The RPC acronym has many meanings and Remote Procedure Call has many forms. In this post, when I talk about RPC I talk about WYGOPIAO: What You GET Or POST Is An Operation.. With this type of RPC, you expose operations to manipulate data through HTTP as a … Compared to REST and SOAP, JSON-RPC is relatively narrow in scope. While REST supports RPC data structures, it’s not the only API protocol in this category. REST. As an example consider a system that notifies customers when a particular item is back in stock. REST versus RPC. REST, RPC, and Brokered Messaging are not mutually exclusive; they can all work together in your microservice architecture. You have applied the Microservice architecture pattern.Services must handle requests from the application’s clients. Soon your simple microservice has become an orchestrator which defies the microservice’s attribute “single in purpose”. Forget REST, think RPC - AWS Lambda allows you to only execute one function - handleRequest(Object input, Context context). gRPC is a relatively new implementation of the Remote Procedure Call (RPC) API paradigm. Consider the tradeoffs between using a REST-style interface versus an RPC-style interface. Blocking – When invoking a REST service, your service is blocked waiting for a response. This is REST in a nutshell, and is an example of a use case in which a lightweight, stateless system is exactly what is needed to deliver the resources to the end client. Pattern: Remote Procedure Invocation (RPI) Context. REST is good between browser and back-end. It defines a uniform interface based on HTTP verbs, which encourages evolvability. It can play a major role in all synchronous communications between internal microservices. Great article. The input is limited to … Furthermore, services must sometimes collaborate to handle those requests. REST models resources, which can be a natural way express your domain model. However, lower compliance level does not necessarily mean statefulness, or higher coupling. Probably, instead of thinking REST vs. RPC, you should use as much REST as possible, but no more. Do not twist your application just to fit with the RESTful compliance standards. RPC: RPC, Remote Procedure Call, is an old mechanism in distributed computing, to execute certain procedure in a remote machine without having to understand the network details. Sure you can update the code to add the new endpoint, but that displays the flaw: unnecessary coupling. While REST is decidedly modern, gRPC is actually a new take on an old approach known as RPC, or Remote Procedure Call. gRPC. The table above shows only the HTTP verbs used commonly by RPC and REST APIs. If you like JSON, you may prefer instead to use JSON-RPC, a protocol introduced in the mid-2000s. 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