Ilker ManapandClaude Opus 5.5
39bb8ee557
Each kept its own hour of quiet per event, so a budget spent on a team both control planes served was announced by each. An event is now claimed in the store before it is sent (notify_sent, migration 0043; one statement, so two asking at once cannot both win), and only the claimer sends it. A store that cannot be asked sends it anyway. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
24 lines
746 B
Go
24 lines
746 B
Go
package store
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import (
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"context"
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"time"
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)
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// ClaimNotice claims the sending of a notification: true when nobody has
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// sent the same one within the window, and from now on, nobody else may
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// until it has passed. One statement, so two control planes asking at once
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// cannot both be told yes.
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func (s *DB) ClaimNotice(ctx context.Context, key string, at time.Time, window time.Duration) (bool, error) {
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now := at.UnixMilli()
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res, err := s.db.ExecContext(ctx,
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`INSERT INTO notify_sent (key, sent_at) VALUES (?, ?)
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ON CONFLICT (key) DO UPDATE SET sent_at = excluded.sent_at WHERE notify_sent.sent_at < ?`,
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key, now, now-window.Milliseconds())
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if err != nil {
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return false, err
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}
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n, err := res.RowsAffected()
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return n == 1, err
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}
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