Quick example of getting a stream in the btrdb-go bindings and counting the number of points

stream_count.go

package main

import (
	"context"
	"fmt"
	"log"
	"time"

	"github.com/BTrDB/btrdb"
	"github.com/PingThingsIO/smartgridstore/modules/creds"
	"github.com/pborman/uuid"
)

func check(err error) {
	if err != nil {
		log.Fatal(err)
	}
}

func main() {
	profile, err := creds.Get("")
	check(err)

	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	db, err := btrdb.ConnectAuth(ctx, profile.BTrDB.APIKey, profile.BTrDB.EndpointsList()...)
	check(err)

	uu := uuid.Parse("2d7829c4-3de2-522c-9a1b-53021d36e973")
	stream := db.StreamFromUUID(uu)
	if exists, err := stream.Exists(context.Background()); !exists || err != nil {
		log.Fatalf("cannot fetch stream: %s\n", err)
	}

	npoints, err := stream.Count(context.Background(), 0)
	check(err)
	fmt.Printf("stream has %d points\n", npoints)
}