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Extract fleet caps (128 hosts, sem=16, 250ms coalesce, syscheck=20) into named constants with Go tests; wire ListStaleOnlineAgents for stale sweeps instead of full ListAgents scans.
31 lines
770 B
Go
31 lines
770 B
Go
package db
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import (
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"time"
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"crypto-miner-server/internal/models"
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)
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// ListStaleOnlineAgents returns online agents whose last_seen is older than
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// the given threshold. Uses indexed status+last_seen filters instead of a full
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// table scan.
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func (d *Database) ListStaleOnlineAgents(olderThan time.Duration) ([]*models.Agent, error) {
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cutoff := time.Now().Add(-olderThan)
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query := `SELECT ` + agentSelectCols + ` FROM agents WHERE status = 'online' AND last_seen < ? ORDER BY last_seen ASC`
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rows, err := d.Query(query, cutoff)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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var agents []*models.Agent
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for rows.Next() {
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a, err := d.scanAgent(rows)
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if err != nil {
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return nil, err
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}
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agents = append(agents, a)
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}
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return agents, rows.Err()
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}
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