So what does gRPC do
gRPC enables writing code that will use another process kind of like an function. It is more complex than that, but that is a good place to start I thinik.
strange name
weird. gRPC stands for gRPC Remote Procedure Calls. A recursive acronym. so.. g is for google?
semantics?
it uses protocol buffer to define Interface Definition Language (IDL)
types of RPC supported
unaryRPC -> function
streamRPC -> client stream, server stream, bidrectional stream
so, total 4 kinds of RPC supported
sync, async supported
Deadlines/Timeouts
depends on application and language client. It can be a duration or a fixed time point. Default value may or may not be there.
RPC Termination
success or fail can be different for server and client. when RPC terminates, client may think it failed to send all requests, while server has finished job and sent back a successful response
Cancelling RPC
cancele anytime anywhere, but changes are not rolled back.
MetaData
form of key-value pairs. string, binary all possible. keys are not case sensitive. - _ . allowed. not start w/ grpc-. if binary, end with -bin.
metadata is opaque to gRPC .
accessing metadata depends on language client
Channels
provides connection to a gRPC server on a specified host and port.
