inital commit

insert.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"context"
+	"encoding/binary"
+	"fmt"
+	"log"
+	"time"
+
+	"go.mongodb.org/mongo-driver/bson/primitive"
+	"go.mongodb.org/mongo-driver/mongo"
+)
+
+func insertOne(ctx context.Context, col *mongo.Collection) {
+	ctx, span := FollowSpan(ctx, "insertOne")
+	defer span.End()
+
+	fmt.Println("Inserting 1 documents...")
+	result, err := col.InsertOne(ctx, book)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Printf("One document inserted with id: %s\n", result.InsertedID)
+	fmt.Println("=============================")
+}
+
+func insertMany(ctx context.Context, col *mongo.Collection) {
+	ctx, span := FollowSpan(ctx, "insertMany")
+	defer span.End()
+
+	fmt.Println("Inserting 2 documents...")
+	inserts := make([]interface{}, 0, len(books))
+	for _, book := range books {
+		inserts = append(inserts, book)
+	}
+
+	result, err := col.InsertMany(ctx, inserts)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Printf("%d documents inserted with ids: %v\n", len(result.InsertedIDs), result.InsertedIDs)
+
+	// ObjectID описание
+	for _, v := range result.InsertedIDs {
+		id := [12]byte(v.(primitive.ObjectID))
+		byteTime := id[0:4]
+		byteRandomID := id[4:9]
+		byteInc := id[9:12]
+		fmt.Printf("Timestamp: %d\n", binary.BigEndian.Uint32(byteTime))
+		fmt.Printf("Timestamp to date: %v\n", time.Unix(int64(binary.BigEndian.Uint32(byteTime)), 0))
+		fmt.Printf("Random val per process and machine: %d\n", binary.BigEndian.Uint32(byteRandomID))
+		fmt.Printf("Inc counter: %d\n", binary.BigEndian.Uint16(byteInc))
+		fmt.Println("*******")
+	}
+
+	fmt.Println("=============================")
+}