hdkit

The tool is help rapidly develop microservice with hdsdk. This tool will help automatically create a microservice based project boilerplate and generating template codes of microservice. Now it supports two kinds codes for different framework:

• dapr
• gokit

Table of Contents

• Requirements
• Usage
  • 1. create microservice project
  • 2. compile protobuf file
  • 3. generate microservice code templates
• FAQ
• Reference

Requirements

Following library or utitiliy are required:

• hdsdk
• protoc binary used compile protobuf files
• gogo protobuf 3rd libray to compile more fast grpc stub files

Theprotoc can be downloaded from above url and extrat binary file into <GOPATH>/bin directory.

Thegogo protobuf tools can be installed with below commands:

go get github.com/gogo/protobuf/proto
go get github.com/gogo/protobuf/protoc-gen-gogofaster
go get github.com/gogo/protobuf/gogoproto

Or if you already create a project as described in Usage part, you can execute <project>/bin/install_compiler.bat to install those tools.

Usage

1. create microservice project

hdkit new <framework> <project_name> -p <protobuf_filepath>

e,g:
hdkit new dapr example -p example.proto
hdkit new gokit example -p example.proto

• Above command will do following:
• create project boilerplate

- <project>
    - autogen
    - service
    - proto
    - bin
    - go.mod

• create <project>/bin directory and output script files to this dir
• gen_grpc.bat: used to compile protobuf files in windows
• install_compiler.bat: install related grpc tools in windows
• if command -p option specified valid protobuf filepath
• if succeed find protobuf file, copy the protobuf file to <project>/proto directory
• if protoc and related tools does exist, it will try to compile protobuf files under <project>/proto directory and output to <project>/autogen/pb directory

2. compile protobuf file

• If specified protobuf file and compiling it successfully in step1, please ignore this part
• If not specified protobuf in step1, it can use hdkit gen pb command to process protobuf

hdkit gen pb <project_name> -p <protobuf_filepath>

• if specified -p option with valid protobuf filepath, it will copy the file to <project>/proto directory, and change into directory<project>/bin then invoke gen_grpc.* script to compile protobuf files. As usual, the compiled pb files will save into <project>/autogen/pb directory
• if not specified -p option, it will try to find all *.proto files under <project>/proto directory, then it will compile them and save result to <project>/autogen/pb directory

3. generate microservice code templates

hdkit gen <framework> <project>

e,g:
hdkit gen dapr example
hdkit gen gokit example

• Firstly, it will try to parse *.pb.go files under <project>/autogen/pb directory one by one until it find a protobuf service
• Based on found service, it will generate following:

  • <project>/main.go

    main entry

  • <project>/service

    The service implementation, please put all business logic here, all files under this directory will not be overwriten

  • if it is gokit based project, it will generate: <project>/autogen/grpc

    • endpoint_<method>.go

      each method in service will have a corresponding endpoint, each endpoint implements hdsdk GrpcEndpoint interface

    • handlers.go:

      handlers is grpc server handler collection, which will have New function and ServeGrpc function

FAQ

to be added

Reference

• kit
• truss