opengemini-client-go

opengemini-client-go is a Go client for OpenGemini.

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OpenGemini is an open-source time series database, find more about OpenGemini at https://github.com/openGemini/openGemini

Requirements

• Go 1.19

Usage

Import the Client Library:

The example code use the dot import, but the user should choose the package import method according to their own needs

import . "github.com/openGemini/opengemini-client-go/opengemini"

Create a Client:

config := &Config{
	Addresses: []*Address{
		{
			Host: "127.0.0.1",
			Port: 8086,
		},
	},
}
client, err := NewClient(config)
if err != nil {
	fmt.Println(err)
}

Create a Database:

exampleDatabase := "ExampleDatabase"
err = client.CreateDatabase(exampleDatabase)
if err != nil {
	fmt.Println(err)
	return
}

Write single point:

exampleMeasurement := "ExampleMeasurement"
point := &Point{}
point.SetMeasurement(exampleMeasurement)
point.AddTag("Weather", "foggy")
point.AddField("Humidity", 87)
point.AddField("Temperature", 25)
err = client.WritePoint(context.Background(),exampleDatabase, point, func(err error) {
	if err != nil {
		fmt.Printf("write point failed for %s", err)
	}
})
if err != nil {
	fmt.Println(err)
}

Write batch points:

exampleMeasurement := "ExampleMeasurement"
var pointList []*Point
var tagList []string
tagList = append(tagList, "sunny", "rainy", "windy")
for i := 0; i < 10; i++ {
	p := &Point{}
	p.SetMeasurement(exampleMeasurement)
	p.AddTag("Weather", tagList[rand.Int31n(3)])
	p.AddField("Humidity", rand.Int31n(100))
	p.AddField("Temperature", rand.Int31n(40))
	p.SetTime(time.Now())
        pointList = append(pointList,p)
	time.Sleep(time.Nanosecond)
}
err = client.WriteBatchPoints(exampleDatabase, pointList)
if err != nil {
	fmt.Println(err)
}

Do a query:

q := Query{
	Database: exampleDatabase,
	Command:  "select * from " + exampleMeasurement,
}
res, err := client.Query(q)
if err != nil {
	fmt.Println(err)
}
for _, r := range res.Results {
	for _, s := range r.Series {
		for _, v := range s.Values {
			for _, i := range v {
				fmt.Print(i)
				fmt.Print(" | ")
			}
			fmt.Println()
		}
	}
}