Ilia Denisov
24 lines
1.0 KiB
Go
24 lines
1.0 KiB
Go
package ports
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import "context"
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// StreamOffsetStore persists the last successfully processed Redis
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// Stream entry id per consumer label. Workers call Load on startup to
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// resume from the persisted offset and Save after every successful
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// message handling so the next iteration advances past the
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// just-processed entry. The label is the short logical identifier of
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// the consumer (e.g. `start_jobs`, `stop_jobs`), not the full stream
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// name; it stays stable when the underlying stream key is renamed.
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type StreamOffsetStore interface {
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// Load returns the last processed entry id for the consumer
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// labelled stream when one is stored. The boolean return reports
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// whether a value was present; implementations must not return an
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// error for a missing key.
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Load(ctx context.Context, stream string) (entryID string, found bool, err error)
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// Save stores entryID as the new last processed offset for the
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// consumer labelled stream. Implementations overwrite any previous
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// value unconditionally.
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Save(ctx context.Context, stream, entryID string) error
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}
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