TarsGo初体验

遇到的坑

README.md很糟心，有以下问题

• 代码错误(根本编译不过)；
• 配置文件错误；
• 帮助文档和实际生成的代码并不致【毕竟刚开源，不完善算是正常现象】。

让第一个Demo跑起来

安装

环境信息

• 操作系统：CentOS Linux release 7.3.1611 (Core)
• golang版本：go1.9.2 linux/amd64
• 内核：Linux 3.10.0-514.21.1.el7.x86_64
• gcc版本：gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-16)
• 已正确配置GOPATH环境变量

TarsGo

$ go get -u -v github.com/TarsCloud/TarsGo/tars
github.com/TarsCloud/TarsGo (download)
github.com/TarsCloud/TarsGo/tars/protocol/res/basef
github.com/TarsCloud/TarsGo/tars/util/gpool
github.com/TarsCloud/TarsGo/tars/util/tools
github.com/TarsCloud/TarsGo/tars/util/set
github.com/TarsCloud/TarsGo/tars/util/rtimer
github.com/TarsCloud/TarsGo/tars/protocol/codec
github.com/TarsCloud/TarsGo/tars/util/current
github.com/TarsCloud/TarsGo/tars/util/rogger
github.com/TarsCloud/TarsGo/tars/util/conf
github.com/TarsCloud/TarsGo/tars/util/debug
github.com/TarsCloud/TarsGo/tars/protocol/res/requestf
github.com/TarsCloud/TarsGo/tars/protocol/res/endpointf
github.com/TarsCloud/TarsGo/tars/transport
github.com/TarsCloud/TarsGo/tars/util/endpoint
github.com/TarsCloud/TarsGo/tars/model
github.com/TarsCloud/TarsGo/tars/protocol/res/adminf
github.com/TarsCloud/TarsGo/tars/protocol/res/configf
github.com/TarsCloud/TarsGo/tars/protocol/res/logf
github.com/TarsCloud/TarsGo/tars/protocol/res/nodef
github.com/TarsCloud/TarsGo/tars/protocol/res/notifyf
github.com/TarsCloud/TarsGo/tars/protocol/res/propertyf
github.com/TarsCloud/TarsGo/tars/protocol/res/queryf
github.com/TarsCloud/TarsGo/tars/protocol/res/statf
github.com/TarsCloud/TarsGo/tars

tars2go

将tars接口文件转换成 go 目标文件的工具，必须要安装

$ cd $GOPATH/src/github.com/TarsCloud/TarsGo/tars/tools/tars2go && go build && go install

测试tars2go

$ tars2go
Usage: tars2go [flags] *.tars
       tars2go -I tars/protocol/res/endpoint [-I ...] QueryF.tars
  -E    Generate code before fmt for troubleshooting
  -I value
        Specify a specific import path
  -add-servant
        Generate AddServant function (default true)
  -outdir string
        which dir to put generated code
  -tarsPath string
        Specify the tars source path. (default "github.com/TarsCloud/TarsGo/tars")

如果提示的是“command not found”，则安装异常

生成第一个测试Demon

TarsGo比较人性化，提供了一个生成Demo的工具

$ cd $GOPATH/src/github.com/TarsCloud/TarsGo/tars/tools
$ ./create_tars_server.sh TestApp HelloGo SayHello
[create server: TestApp.HelloGo ...]
[mkdir: /home/luojie/gopath//src/TestApp/HelloGo/]
>>>Now doing:./Servant.tars >>>>
>>>Now doing:./start.sh >>>>
>>>Now doing:./Server.go >>>>
>>>Now doing:./Server.conf >>>>
>>>Now doing:./makefile >>>>
>>>Now doing:./ServantImp.go >>>>
>>>Now doing:client/client.go >>>>
>>>Now doing:vendor/vendor.json >>>>
>>>Now doing:debugtool/dumpstack.go >>>>
>>> Great！Done! You can jump in /home/luojie/gopath/src/TestApp/HelloGo
>>> Tips: After editing the Tars file, execute the following cmd to automatically generate golang files.
>>>       /home/luojie/gopath//bin/tars2go *.tars

查看生成的代码

如果生成的步骤正常，将会在$GOPATH/src/目录下面的生成TestApp目录

目录结构如下：

$ tree
.
`-- HelloGo
    |-- client
    |   `-- client.go
    |-- debugtool
    |   `-- dumpstack.go
    |-- HelloGo
    |-- HelloGo.conf
    |-- HelloGo.go
    |-- HelloGo.tgz
    |-- makefile
    |-- SayHelloImp.go
    |-- SayHello.tars
    |-- start.sh
    |-- TestApp
    |   `-- SayHello_IF.go
    `-- vendor
        |-- _APP_
        |   `-- _SERVANT__IF.go
        |-- TestApp
        |   `-- SayHello_IF.go
        `-- vendor.json

7 directories, 14 files

说明

• SayHello.tars是接口文件，编译时由tars2go生成go文件
• HelloGo.conf是服务启动的的配置文件[先可以不用理会]
• start.sh是服务启动脚本，会先执行make，再启动服务

完善实现

$ cat SayHelloImp.go 
package main

type SayHelloImp struct {
}

func (imp *SayHelloImp) Add(a int32, b int32, c *int32) (int32, error) {
    //Doing something in your function
    //...
    return 0, nil
}
func (imp *SayHelloImp) Sub(a int32, b int32, c *int32) (int32, error) {
    //Doing something in your function
    //...
    return 0, nil
}

帮助手册让我们生成的SayHello程序，接口竟然变成了Add和Sub，所以，看到SayHello的时候，不要觉得奇怪

请自行补充缺少的代码

编译代码

$ cd HelloGo/
$ make && make tar
/home/luojie/gopath//bin/tars2go -outdir=vendor   SayHello.tars
/home/luojie/software/go//bin/go build  -o HelloGo
/home/luojie/gopath//bin/tars2go -outdir=vendor   SayHello.tars
/home/luojie/software/go//bin/go build  -o HelloGo
HelloGo/
HelloGo/client/
HelloGo/client/client.go
HelloGo/HelloGo
‘HelloGo.tgz’ -> ‘HelloGo.20190122213710.tgz’
tar cvfz HelloGo.tgz ...

出现以上的结果，说明编译正常。

启动服务

可直接运行start.sh或者执行以下命令，让服务在后台启动

$ ./HelloGo --config=HelloGo.conf &

注意：直接运行start.sh时，会给人一种假像，好像卡住了

启动客户端

$ cd client
$ go run client.go
0 369

个人感受

• 虽然帮助文档让人很蛋疼
• 但是提供的这些 工具 功能还是非常强大的
• 可以让新手最快体验tarsGo带来的便利

写在最后

• 如果你的代码无法正常编译，请根据平台调整相关参数，或者手动编译【例如：ubuntu18.04中make时会出错】
• 遇到问题时，请仔细阅读错误信息，你遇到的问题，万千网友早已遇到，百度/谷歌可以找到答案