Advanced Techniques in Go Programming/

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Solution 5: Working with gRPC

Solution 5: Working with gRPC

Let’s solve the challenge set in the previous lesson.

We'll cover the following...

Solution

To execute the client side, open a new terminal window and run the following commands:

export GOROOT=/usr/local/go; export GOPATH=$HOME/go; export PATH=$GOPATH/bin:$GOROOT/bin:$PATH; cd usercode;
go run gClient.go

Here is the implementation of a gRPC service that calculates the length of a string:

# Copy the protoapi directory to $GOROOT/src
cp -r protoapi $GOROOT/src

# Change directory to $GOROOT/src/protoapi
cd $GOROOT/src/protoapi

# Install the protoc-gen -go@v1.26 & protoc-gen-go-grpc@v1.1 packages
go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.26
go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.1

# Creates two files protoapi.pb.go & protoapi_grpc.pb.go
protoc --go_out=. --go_opt=paths=source_relative --go-grpc_out=. --go-grpc_opt=paths=source_relative protoapi.proto

# Change the directory back to usercode
cd /usercode
gServer.go and gClient,go

Code explanation

Let's look at the code explanation of the gServer.go code:

  • Lines 14–16: DLet’We define a struct called StringServer ...