[TASK] add job tag to influxdb database type (#44)

config_example.toml

@@ -67,6 +67,11 @@ address  = "http://localhost:8086"
 database = "ffhb"
 username = ""
 password = ""
+# tagging of the data are optional
+# be carefull tags by system would overright config
+[database.connection.influxdb.tags]
+site = "ffhb01"
+system = "testing"
 
 [[database.connection.logging]]
 enable   = false

database/influxdb/database.go

@@ -45,6 +45,12 @@ func (c Config) Username() string {
 func (c Config) Password() string {
 	return c["password"].(string)
 }
+func (c Config) Tags() map[string]interface{} {
+	if c["tags"] != nil {
+		return c["tags"].(map[string]interface{})
+	}
+	return nil
+}
 
 func init() {
 	database.RegisterAdapter("influxdb", Connect)
@@ -79,6 +85,15 @@ func Connect(configuration interface{}) (database.Connection, error) {
 }
 
 func (conn *Connection) addPoint(name string, tags models.Tags, fields models.Fields, t ...time.Time) {
+	if configTags := conn.config.Tags(); configTags != nil {
+		for tag, valueInterface := range configTags {
+			if value, ok := valueInterface.(string); ok && tags.Get([]byte(tag)) == nil {
+				tags.SetString(tag, value)
+			} else {
+				log.Println(name, "could not saved configured value of tag", tag)
+			}
+		}
+	}
 	point, err := client.NewPoint(name, tags.Map(), fields, t...)
 	if err != nil {
 		panic(err)

database/influxdb/database_test.go

@@ -0,0 +1,61 @@
+package influxdb
+
+import (
+	"testing"
+	"time"
+
+	"github.com/influxdata/influxdb/client/v2"
+	"github.com/influxdata/influxdb/models"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAddPoint(t *testing.T) {
+	assert := assert.New(t)
+
+	// Test add Point without tags
+	connection := &Connection{
+		config: map[string]interface{}{},
+		points: make(chan *client.Point, 1),
+	}
+
+	connection.addPoint("name", models.Tags{}, models.Fields{"clients.total": 10}, time.Now())
+	point := <-connection.points
+	assert.NotNil(point)
+	tags := point.Tags()
+	assert.NotNil(tags)
+	assert.NotEqual(tags["testtag2"], "value")
+
+	// Test add Point with tags
+	connection.config["tags"] = map[string]interface{}{
+		"testtag": "value",
+	}
+
+	connection.addPoint("name", models.Tags{}, models.Fields{"clients.total": 10}, time.Now())
+	point = <-connection.points
+	assert.NotNil(point)
+	tags = point.Tags()
+	assert.NotNil(tags)
+	assert.Equal(tags["testtag"], "value")
+	assert.NotEqual(tags["testtag2"], "value")
+
+	// Tried to overright by config
+	connection.config["tags"] = map[string]interface{}{
+		"nodeid": "value",
+	}
+
+	tagsOrigin := models.Tags{}
+	tagsOrigin.SetString("nodeid", "collected")
+
+	connection.addPoint("name", tagsOrigin, models.Fields{"clients.total": 10}, time.Now())
+	point = <-connection.points
+	assert.NotNil(point)
+	tags = point.Tags()
+	assert.NotNil(tags)
+	assert.Equal(tags["nodeid"], "collected")
+
+	// Test panic if it was not possible to create a point
+	assert.Panics(func() {
+		connection.addPoint("name", models.Tags{}, nil, time.Now())
+	})
+}