93 lines
2.1 KiB
Go
93 lines
2.1 KiB
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package audit
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import (
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"context"
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"math/rand"
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"time"
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"go.uber.org/zap"
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"storj.io/common/sync2"
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"storj.io/storj/satellite/metainfo/metaloop"
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)
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// Chore populates reservoirs and the audit queue.
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//
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// architecture: Chore
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type Chore struct {
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log *zap.Logger
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rand *rand.Rand
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queues *Queues
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Loop *sync2.Cycle
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metainfoLoop *metaloop.Service
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config Config
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}
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// NewChore instantiates Chore.
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func NewChore(log *zap.Logger, queues *Queues, metaLoop *metaloop.Service, config Config) *Chore {
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return &Chore{
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log: log,
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rand: rand.New(rand.NewSource(time.Now().Unix())),
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queues: queues,
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Loop: sync2.NewCycle(config.ChoreInterval),
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metainfoLoop: metaLoop,
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config: config,
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}
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}
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// Run starts the chore.
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func (chore *Chore) Run(ctx context.Context) (err error) {
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defer mon.Task()(&ctx)(&err)
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return chore.Loop.Run(ctx, func(ctx context.Context) (err error) {
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defer mon.Task()(&ctx)(&err)
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// If the previously pushed queue is still waiting to be swapped in, wait.
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err = chore.queues.WaitForSwap(ctx)
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if err != nil {
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return err
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}
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collector := NewCollector(chore.config.Slots, chore.rand)
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err = chore.metainfoLoop.Join(ctx, collector)
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if err != nil {
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chore.log.Error("error joining metainfoloop", zap.Error(err))
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return nil
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}
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var newQueue []Segment
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queueSegments := make(map[Segment]struct{})
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// Add reservoir segments to queue in pseudorandom order.
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for i := 0; i < chore.config.Slots; i++ {
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for _, res := range collector.Reservoirs {
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// Skip reservoir if no segment at this index.
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if len(res.Segments) <= i {
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continue
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}
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segment := res.Segments[i]
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if segment == (Segment{}) {
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continue
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}
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if _, ok := queueSegments[segment]; !ok {
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newQueue = append(newQueue, segment)
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queueSegments[segment] = struct{}{}
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}
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}
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}
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// Push new queue to queues struct so it can be fetched by worker.
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return chore.queues.Push(newQueue)
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})
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}
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// Close closes chore.
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func (chore *Chore) Close() error {
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chore.Loop.Close()
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return nil
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}
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