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‎.gitignore

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##### Go #####
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# Binaries for programs and plugins
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*.exe
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*.exe~
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*.dll
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*.so
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*.dylib
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# Test binary, built with `go test -c`
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*.test
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# Output of the go coverage tool, specifically when used with LiteIDE
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*.out
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# Dependency directories (remove the comment below to include it)
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# vendor/
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##### VisualStudioCode #####
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.vscode/*
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*.code-workspace
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# Local History for Visual Studio Code
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.history/
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##### go-task #####
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.task
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##### goreleaser #####
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dist/

‎.goreleaser.yml

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project_name: grpc-examples
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before:
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hooks:
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# You may remove this if you don't use go modules.
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- go mod download
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# # you may remove this if you don't need go generate
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# - go generate ./...
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builds:
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- dir: examples/helloworld/greeter_client
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id: "greeter_client"
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binary: greeter_client
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env:
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- CGO_ENABLED=0
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goos:
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- linux
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- windows
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- darwin
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- dir: examples/helloworld/greeter_server
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id: "greeter_server"
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binary: greeter_server
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env:
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- CGO_ENABLED=0
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goos:
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- linux
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- windows
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- darwin
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goarch:
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- amd64
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- arm64
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goarm:
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- 6
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- 7
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archives:
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- replacements:
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darwin: Darwin
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linux: Linux
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windows: Windows
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386: i386
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amd64: x86_64
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checksum:
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name_template: 'checksums.txt'
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snapshot:
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name_template: "{{ .Tag }}"
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changelog:
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sort: asc
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filters:
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exclude:
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- '^docs:'
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- '^test:'

‎README.md

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## My Project
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# gRPC Examples
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TODO: Fill this README out!
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gRPC examples and feature references
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Be sure to:
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## Example applications
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* Change the title in this README
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* Edit your repository description on GitHub
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* [helloworld](examples/helloworld/) - Forked from [grpc/grpc-go/examples/helloworld](https://github.com/grpc/grpc-go/tree/master/examples/helloworld)
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## Building examples
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This project uses [Task](https://taskfile.dev) to build and run examples. Each `Taskfile.yml` can be used to build and run each example or variation.
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## Security
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‎examples/helloworld/Taskfile.yml

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version: '3'
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vars:
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CLIENT_APP: greeter_client
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SERVER_APP: greeter_server
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REGISTRY: ""
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REPOSITORY: aws-samples
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TAG: latest
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PROTODIR: helloworld
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includes:
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client:
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taskfile: ./greeter_client
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dir: ./greeter_client
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server:
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taskfile: ./greeter_server
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dir: ./greeter_server
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tasks:
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proto:
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desc: "[Re]Generate go code for protocol buffers."
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cmds:
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- protoc -I {{.PROTODIR}} --go_out=paths=source_relative:{{.PROTODIR}} --go-grpc_out=paths=source_relative:{{.PROTODIR}} helloworld.proto
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build-container:
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desc: Builds and pushes this example's containers.
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cmds:
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- task: client:buildx-container
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- task: server:buildx-container

‎examples/helloworld/greeter_client/Dockerfile

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FROM golang:1.14.1 as builder
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RUN CGO_ENABLED=0 go get github.com/aws-samples/grpc-examples/examples/helloworld/greeter_client
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FROM scratch
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COPY --from=builder /go/bin/greeter_client /greeter_client
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CMD ["/greeter_client"]
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‎examples/helloworld/greeter_client/Taskfile.yml

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version: '3'
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vars:
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CLIENT_APP: greeter_client
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REGISTRY: ""
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REPOSITORY: aws-samples
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TAG: latest
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tasks:
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build:
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desc: Build the go binary.
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cmds:
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- go install .
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env:
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CGO_ENABLED: 0
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sources:
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- ./*.go
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generates:
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- ./{{.CLIENT_APP}}{{exeExt}}
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method: checksum
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clean:
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desc: Deletes the go binary.
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cmds:
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- go clean -i .
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build-container:
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desc: Build the Docker container locally.
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cmds:
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- docker build -t {{.REGISTRY}}{{if ne .REGISTRY ""}}/{{end}}{{.REPOSITORY}}{{if ne .REPOSITORY ""}}/{{end}}{{.CLIENT_APP}}:{{.TAG}} .
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buildx-container:
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desc: Builds and pushes the multi-architecture image.
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cmds:
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- docker buildx build --platform linux/arm/v7,linux/arm64/v8,linux/amd64 --tag {{.REGISTRY}}{{if ne .REGISTRY ""}}/{{end}}{{.REPOSITORY}}{{if ne .REPOSITORY ""}}/{{end}}{{.CLIENT_APP}}:{{.TAG}} --push .
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run-container:
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desc: Run the Docker container locally.
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cmds:
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- docker run -d --name {{.CLIENT_APP}} --link greeter_server -e "GREETER_ENDPOINT=greeter_server:50051" {{.REGISTRY}}{{if ne .REGISTRY ""}}/{{end}}{{.REPOSITORY}}{{if ne .REPOSITORY ""}}/{{end}}{{.CLIENT_APP}}:{{.TAG}}
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clean-container:
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desc: Stops and removes the container locally.
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cmds:
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- cmd: docker stop {{.CLIENT_APP}} > /dev/null 2>&1
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ignore_error: true
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- cmd: docker rm {{.CLIENT_APP}} > /dev/null 2>&1
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ignore_error: true

‎examples/helloworld/greeter_client/main.go

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/*
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*
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* Copyright 2015 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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// Package main implements a client for Greeter service.
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package main
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import (
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"context"
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"log"
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"os"
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"time"
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pb "github.com/aws-samples/grpc-examples/examples/helloworld/helloworld"
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"google.golang.org/grpc"
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)
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const (
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defaultName = "world"
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)
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var (
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address = "localhost:50051"
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)
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func init() {
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if ep, ok := os.LookupEnv("GREETER_ENDPOINT"); ok {
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address = ep
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}
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}
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func main() {
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// Set up a connection to the server.
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conn, err := grpc.Dial(address, grpc.WithInsecure(), grpc.WithBlock())
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if err != nil {
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log.Fatalf("did not connect: %v", err)
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}
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defer conn.Close()
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c := pb.NewGreeterClient(conn)
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// Contact the server and print out its response.
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name := defaultName
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if len(os.Args) > 1 {
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name = os.Args[1]
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}
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ctx, cancel := context.WithTimeout(context.Background(), time.Second)
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defer cancel()
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r, err := c.SayHello(ctx, &pb.HelloRequest{Name: name})
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if err != nil {
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log.Fatalf("could not greet: %v", err)
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}
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log.Printf("Greeting: %s", r.GetMessage())
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}

‎examples/helloworld/greeter_server/Dockerfile

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FROM golang:1.14.1 as builder
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RUN CGO_ENABLED=0 go get github.com/grpc-ecosystem/grpc-health-probe
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RUN CGO_ENABLED=0 go get github.com/aws-samples/grpc-examples/examples/helloworld/greeter_server
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FROM scratch
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COPY --from=builder /go/bin/grpc-health-probe /grpc-health-probe
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COPY --from=builder /go/bin/greeter_server /greeter_server
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EXPOSE 50051
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CMD ["/greeter_server"]

‎examples/helloworld/greeter_server/Taskfile.yml

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version: '3'
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vars:
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SERVER_APP: greeter_server
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REGISTRY: ""
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REPOSITORY: aws-samples
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TAG: latest
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tasks:
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build:
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desc: Build the go binary.
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cmds:
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- go install .
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env:
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CGO_ENABLED: 0
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sources:
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- ./*.go
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generates:
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- ./{{.SERVER_APP}}{{exeExt}}
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method: checksum
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clean:
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desc: Deletes the go binary.
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cmds:
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- go clean -i .
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build-container:
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desc: Build the Docker container locally.
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cmds:
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- docker build -t {{.REGISTRY}}{{if ne .REGISTRY ""}}/{{end}}{{.REPOSITORY}}{{if ne .REPOSITORY ""}}/{{end}}{{.SERVER_APP}}:{{.TAG}} .
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buildx-container:
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desc: Builds and pushes the multi-architecture image.
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cmds:
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- docker buildx build --platform linux/arm/v7,linux/arm64/v8,linux/amd64 --tag {{.REGISTRY}}{{if ne .REGISTRY ""}}/{{end}}{{.REPOSITORY}}{{if ne .REPOSITORY ""}}/{{end}}{{.SERVER_APP}}:{{.TAG}} --push .
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run-container:
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desc: Run the Docker container locally.
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cmds:
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- docker run -d --name {{.SERVER_APP}} -p 50051:50051 {{.REGISTRY}}{{if ne .REGISTRY ""}}/{{end}}{{.REPOSITORY}}{{if ne .REPOSITORY ""}}/{{end}}{{.SERVER_APP}}:{{.TAG}}
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clean-container:
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desc: Stops and removes the container locally.
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cmds:
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- cmd: docker stop {{.SERVER_APP}} > /dev/null 2>&1
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ignore_error: true
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- cmd: docker rm {{.SERVER_APP}} > /dev/null 2>&1
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ignore_error: true

‎examples/helloworld/greeter_server/main.go

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/*
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*
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* Copyright 2015 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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// Package main implements a server for Greeter service.
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package main
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import (
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"context"
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"log"
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"net"
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pb "github.com/aws-samples/grpc-examples/examples/helloworld/helloworld"
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"google.golang.org/grpc"
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"google.golang.org/grpc/health"
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"google.golang.org/grpc/health/grpc_health_v1"
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)
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const (
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port = ":50051"
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)
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// server is used to implement helloworld.GreeterServer.
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type server struct {
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pb.UnimplementedGreeterServer
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}
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// sayHello implements helloworld.GreeterServer.SayHello
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func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
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log.Printf("Received: %v", in.GetName())
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return &pb.HelloReply{Message: "Hello " + in.GetName()}, nil
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}
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func main() {
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lis, err := net.Listen("tcp", port)
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if err != nil {
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log.Fatalf("failed to listen: %v", err)
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}
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s := grpc.NewServer()
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pb.RegisterGreeterServer(s, &server{})
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grpc_health_v1.RegisterHealthServer(s, health.NewServer())
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if err := s.Serve(lis); err != nil {
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log.Fatalf("failed to serve: %v", err)
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}
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}

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