52 lines
1.4 KiB
Go
52 lines
1.4 KiB
Go
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// Copyright (C) 2022 Storj Labs, Inc.
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// See LICENSE for copying information.
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package rangedlooptest
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import (
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"context"
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"time"
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"storj.io/storj/satellite/metabase/rangedloop"
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"storj.io/storj/satellite/metabase/segmentloop"
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)
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var _ rangedloop.Observer = (*CountObserver)(nil)
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var _ rangedloop.Partial = (*CountObserver)(nil)
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// CountObserver is a subscriber to the ranged segment loop which counts the number of segments.
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type CountObserver struct {
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NumSegments int
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}
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// Start is the callback for segment loop start.
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func (c *CountObserver) Start(ctx context.Context, time time.Time) error {
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c.NumSegments = 0
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return nil
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}
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// Fork splits the observer to count ranges of segments.
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func (c *CountObserver) Fork(ctx context.Context) (rangedloop.Partial, error) {
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// return new instance for threadsafety
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return &CountObserver{}, nil
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}
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// Join adds the count of all the ranges together.
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func (c *CountObserver) Join(ctx context.Context, partial rangedloop.Partial) error {
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countPartial := partial.(*CountObserver)
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c.NumSegments += countPartial.NumSegments
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// Range done
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return nil
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}
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// Finish is the callback for ranged segment loop end.
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func (c *CountObserver) Finish(ctx context.Context) error {
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return nil
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}
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// Process counts the size of a batch of segments.
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func (c *CountObserver) Process(ctx context.Context, segments []segmentloop.Segment) error {
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c.NumSegments += len(segments)
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return nil
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}
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