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path: root/cmd/swarm/swarm-smoke/sliding_window.go
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// Copyright 2018 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.

package main

import (
    "bytes"
    "fmt"
    "math/rand"
    "time"

    "github.com/ethereum/go-ethereum/log"
    "github.com/ethereum/go-ethereum/metrics"
    "github.com/ethereum/go-ethereum/swarm/testutil"
    "github.com/pborman/uuid"

    cli "gopkg.in/urfave/cli.v1"
)

type uploadResult struct {
    hash   string
    digest []byte
}

func slidingWindowCmd(ctx *cli.Context, tuid string) error {
    errc := make(chan error)

    go func() {
        errc <- slidingWindow(ctx, tuid)
    }()

    select {
    case err := <-errc:
        if err != nil {
            metrics.GetOrRegisterCounter(fmt.Sprintf("%s.fail", commandName), nil).Inc(1)
        }
        return err
    case <-time.After(time.Duration(timeout) * time.Second):
        metrics.GetOrRegisterCounter(fmt.Sprintf("%s.timeout", commandName), nil).Inc(1)

        return fmt.Errorf("timeout after %v sec", timeout)
    }
}

func slidingWindow(ctx *cli.Context, tuid string) error {
    hashes := []uploadResult{} //swarm hashes of the uploads
    nodes := len(hosts)
    const iterationTimeout = 30 * time.Second
    log.Info("sliding window test started", "tuid", tuid, "nodes", nodes, "filesize(kb)", filesize, "timeout", timeout)
    uploadedBytes := 0
    networkDepth := 0
    errored := false

outer:
    for {
        log.Info("uploading to "+httpEndpoint(hosts[0])+" and syncing", "seed", seed)

        t1 := time.Now()

        randomBytes := testutil.RandomBytes(seed, filesize*1000)

        hash, err := upload(randomBytes, httpEndpoint(hosts[0]))
        if err != nil {
            log.Error(err.Error())
            return err
        }

        metrics.GetOrRegisterResettingTimer("sliding-window.upload-time", nil).UpdateSince(t1)

        fhash, err := digest(bytes.NewReader(randomBytes))
        if err != nil {
            log.Error(err.Error())
            return err
        }

        log.Info("uploaded successfully", "hash", hash, "digest", fmt.Sprintf("%x", fhash), "sleeping", syncDelay)
        hashes = append(hashes, uploadResult{hash: hash, digest: fhash})
        time.Sleep(time.Duration(syncDelay) * time.Second)
        uploadedBytes += filesize * 1000

        for i, v := range hashes {
            timeout := time.After(time.Duration(timeout) * time.Second)
            errored = false

        inner:
            for {
                select {
                case <-timeout:
                    errored = true
                    log.Error("error retrieving hash. timeout", "hash idx", i, "err", err)
                    metrics.GetOrRegisterCounter("sliding-window.single.error", nil).Inc(1)
                    break inner
                default:
                    idx := 1 + rand.Intn(len(hosts)-1)
                    ruid := uuid.New()[:8]
                    start := time.Now()
                    err := fetch(v.hash, httpEndpoint(hosts[idx]), v.digest, ruid, "")
                    if err != nil {
                        continue inner
                    }
                    metrics.GetOrRegisterResettingTimer("sliding-window.single.fetch-time", nil).UpdateSince(start)
                    break inner
                }
            }

            if errored {
                break outer
            }
            networkDepth = i
            metrics.GetOrRegisterGauge("sliding-window.network-depth", nil).Update(int64(networkDepth))
        }
    }

    log.Info("sliding window test finished", "errored?", errored, "networkDepth", networkDepth, "networkDepth(kb)", networkDepth*filesize)
    log.Info("stats", "uploadedFiles", len(hashes), "uploadedKb", uploadedBytes/1000, "filesizeKb", filesize)

    return nil
}