DefaultClient returns a new default Client instance with a default client interceptor and default dialoption.

NewClient returns a new blank Client instance with a default client interceptor.

NewConn will create a grpc conn by default config.

NewServer returns a new blank Server instance with a default server interceptor.

Client is the framework's client side instance, it contains the ctx, opt and interceptors.

ClientConfig is rpc client conf.

Server is the framework's server side instance, it contains the GrpcServer, interceptor and interceptors.

ServerConfig is rpc server conf.