![]() ![]() ![]() One service calls either one service or two services or maybe more services and further those services may be calling other services. Initially, all microservices were interconnected through REST APIs. Because of the binary data format, it is very light.It can switch from JSON to protocol buffers.gRPC is built on HTTP/2, which supports traditional Request/Response model and bidirectional streams. It has the ability to break free from the call-and-response architecture.Also, having first-class support for defining a service interface via an IDL is a powerful feature when we have to deal with multiple microservices and ensure and maintain interoperability. What comes in the wire is a binary format, which is unmarshalled into an object. The main advantage of developing services and clients with gRPC is that your service code or client-side code doesn’t need to worry about parsing JSON or similar text-based message formats (within the code or implicitly inside the underlying libraries such as Jackson, which is hidden from service code). The response follows a similar execution flow from the server to the client. The server un-marshals the request and executes the respective procedure invocation using protocol buffers. When the client invokes the service, the client-side gRPC library uses the protocol buffer and marshals the remote procedure call, which is then sent over HTTP2. gRPC is based on the foundations of conventional Remote Procedure Call (RPC) technology but implemented on top of the modern technology stacks such as HTTP2, protocol buffers, etc., to ensure maximum interoperability. With it, a customer can directly call methods on a server application on a different machine as if it were a local object. Google developed gRPC and made it available open-source. In simple words, it enables the server and client applications to communicate transparently and build connected systems. It is a high performance, open-source, universal RPC framework. Hi folks! In this blog, we will understand why one should use gRPC for inter-service communication over other RESTful services. ![]()
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