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package cmd
import (
"encoding/json"
"fmt"
"io"
"math"
"os"
"time"
"github.com/spf13/cobra"
"github.com/vespa-engine/vespa/client/go/internal/util"
"github.com/vespa-engine/vespa/client/go/internal/vespa"
"github.com/vespa-engine/vespa/client/go/internal/vespa/document"
)
func addFeedFlags(cmd *cobra.Command, verbose *bool, connections *int) {
cmd.PersistentFlags().IntVarP(connections, "connections", "N", 8, "The number of connections to use")
cmd.PersistentFlags().BoolVarP(verbose, "verbose", "v", false, "Verbose mode. Print errors as they happen")
}
func newFeedCmd(cli *CLI) *cobra.Command {
var (
verbose bool
connections int
)
cmd := &cobra.Command{
Use: "feed FILE",
Short: "Feed documents to a Vespa cluster",
Long: `Feed documents to a Vespa cluster.
A high performance feeding client. This can be used to feed large amounts of
documents to a Vespa cluster efficiently.
The contents of FILE must be either a JSON array or JSON objects separated by
newline (JSONL).
If FILE is a single dash ('-'), documents will be read from standard input.
`,
Example: `$ vespa feed documents.jsonl
$ cat documents.jsonl | vespa feed -
`,
Args: cobra.ExactArgs(1),
DisableAutoGenTag: true,
SilenceUsage: true,
Hidden: true, // TODO(mpolden): Remove when ready for public use
RunE: func(cmd *cobra.Command, args []string) error {
var r io.Reader
if args[0] == "-" {
r = cli.Stdin
} else {
f, err := os.Open(args[0])
if err != nil {
return err
}
defer f.Close()
r = f
}
return feed(r, cli, verbose, connections)
},
}
addFeedFlags(cmd, &verbose, &connections)
return cmd
}
func createServiceClients(service *vespa.Service, n int) []util.HTTPClient {
clients := make([]util.HTTPClient, 0, n)
for i := 0; i < n; i++ {
client := service.Client().Clone()
util.ForceHTTP2(client, service.TLSOptions.KeyPair) // Feeding should always use HTTP/2
clients = append(clients, client)
}
return clients
}
func feed(r io.Reader, cli *CLI, verbose bool, connections int) error {
service, err := documentService(cli)
if err != nil {
return err
}
clients := createServiceClients(service, connections)
client := document.NewClient(document.ClientOptions{
BaseURL: service.BaseURL,
}, clients)
throttler := document.NewThrottler(connections)
// TODO(mpolden): Make doom duration configurable
circuitBreaker := document.NewCircuitBreaker(10*time.Second, 0)
errWriter := io.Discard
if verbose {
errWriter = cli.Stderr
}
dispatcher := document.NewDispatcher(client, throttler, circuitBreaker, errWriter)
dec := document.NewDecoder(r)
start := cli.now()
for {
doc, err := dec.Decode()
if err == io.EOF {
break
}
if err != nil {
cli.printErr(fmt.Errorf("failed to decode document: %w", err))
}
if err := dispatcher.Enqueue(doc); err != nil {
cli.printErr(err)
}
}
if err := dispatcher.Close(); err != nil {
return err
}
elapsed := cli.now().Sub(start)
return writeSummaryJSON(cli.Stdout, dispatcher.Stats(), elapsed)
}
type number float32
func (n number) MarshalJSON() ([]byte, error) { return []byte(fmt.Sprintf("%.3f", n)), nil }
type feedSummary struct {
Seconds number `json:"feeder.seconds"`
SuccessCount int64 `json:"feeder.ok.count"`
SuccessRate number `json:"feeder.ok.rate"`
ErrorCount int64 `json:"feeder.error.count"`
InflightCount int64 `json:"feeder.inflight.count"`
RequestCount int64 `json:"http.request.count"`
RequestBytes int64 `json:"http.request.bytes"`
RequestRate number `json:"http.request.MBps"`
ExceptionCount int64 `json:"http.exception.count"` // same as ErrorCount, for compatability with vespa-feed-client
ResponseCount int64 `json:"http.response.count"`
ResponseBytes int64 `json:"http.response.bytes"`
ResponseRate number `json:"http.response.MBps"`
ResponseErrorCount int64 `json:"http.response.error.count"`
ResponseMinLatency int64 `json:"http.response.latency.millis.min"`
ResponseAvgLatency int64 `json:"http.response.latency.millis.avg"`
ResponseMaxLatency int64 `json:"http.response.latency.millis.max"`
ResponseCodeCounts map[int]int64 `json:"http.response.code.counts"`
}
func mbps(bytes int64, duration time.Duration) float64 {
return (float64(bytes) / 1000 / 1000) / math.Max(1, duration.Seconds())
}
func writeSummaryJSON(w io.Writer, stats document.Stats, duration time.Duration) error {
summary := feedSummary{
Seconds: number(duration.Seconds()),
SuccessCount: stats.Successes(),
SuccessRate: number(float64(stats.Successes()) / math.Max(1, duration.Seconds())),
ErrorCount: stats.Errors,
InflightCount: stats.Inflight,
RequestCount: stats.Requests,
RequestBytes: stats.BytesSent,
RequestRate: number(mbps(stats.BytesSent, duration)),
ExceptionCount: stats.Errors,
ResponseCount: stats.Responses,
ResponseBytes: stats.BytesRecv,
ResponseRate: number(mbps(stats.BytesRecv, duration)),
ResponseErrorCount: stats.Responses - stats.Successes(),
ResponseMinLatency: stats.MinLatency.Milliseconds(),
ResponseAvgLatency: stats.AvgLatency().Milliseconds(),
ResponseMaxLatency: stats.MaxLatency.Milliseconds(),
ResponseCodeCounts: stats.ResponsesByCode,
}
enc := json.NewEncoder(w)
enc.SetIndent("", " ")
return enc.Encode(summary)
}
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