gRPC Fundamentals
gRPC is a framework for calling a service method across a network through a typed contract. You define services and messages once, generate language-specific code, and use it to build clients and servers that can communicate across different languages.
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Intro
gRPC Fundamentals
gRPC is a remote procedure call framework. A client calls a method on a service running elsewhere. The call looks like a local method invocation in application code, but it crosses a network boundary.
That boundary still matters. The network can be slow, unavailable, or partitioned. A request can finish on the server after the client has already given up. gRPC makes the contract and generated code easier to work with. It does not remove distributed-system failure.
Start with the contract
gRPC commonly uses Protocol Buffers for both the interface definition language and message format. You write a .proto file that declares messages and service methods. The Protocol Buffers compiler, with a gRPC plugin, generates message code plus client and server interfaces for your chosen language.
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