Extracted insert to database functionality (#1082)

agent/pkg/api/socket_data_inserter.go

@@ -0,0 +1,71 @@
+package api
+
+import (
+	"encoding/json"
+	"fmt"
+	basenine "github.com/up9inc/basenine/client/go"
+	"github.com/up9inc/mizu/logger"
+	"github.com/up9inc/mizu/shared"
+	"github.com/up9inc/mizu/tap/api"
+	"sync"
+	"time"
+)
+
+type EntryInserter interface {
+	Insert(entry *api.Entry) error
+}
+
+type BasenineEntryInserter struct {
+	connection *basenine.Connection
+}
+
+var instance *BasenineEntryInserter
+var once sync.Once
+
+func GetBasenineEntryInserterInstance() *BasenineEntryInserter {
+	once.Do(func() {
+		instance = &BasenineEntryInserter{}
+	})
+
+	return instance
+}
+
+func (e *BasenineEntryInserter) Insert(entry *api.Entry) error {
+	if e.connection == nil {
+		e.connection = initializeConnection()
+	}
+
+	data, err := json.Marshal(entry)
+	if err != nil {
+		return fmt.Errorf("error marshling entry, err: %v", err)
+	}
+
+	if err := e.connection.SendText(string(data)); err != nil {
+		e.connection.Close()
+		e.connection = nil
+
+		return fmt.Errorf("error sending text to database, err: %v", err)
+	}
+
+	return nil
+}
+
+func initializeConnection() *basenine.Connection{
+	for {
+		connection, err := basenine.NewConnection(shared.BasenineHost, shared.BaseninePort)
+		if err != nil {
+			logger.Log.Errorf("Can't establish a new connection to Basenine server: %v", err)
+			time.Sleep(shared.BasenineReconnectInterval * time.Second)
+			continue
+		}
+
+		if err = connection.InsertMode(); err != nil {
+			logger.Log.Errorf("Insert mode call failed: %v", err)
+			connection.Close()
+			time.Sleep(shared.BasenineReconnectInterval * time.Second)
+			continue
+		}
+
+		return connection
+	}
+}