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Each webhook's event database keeps one row of running totals: events, deliveries and failures, and how many of each retention removed. Storing an event, creating a delivery, a delivery becoming failed and the retention sweep each update it in the transaction that writes or deletes the rows it counts. Deliveries get a finished_at column, the last column of the status index, so the last-10-minutes and last-24-hours figures are index-range counts. The pane is its own template, included at the top of the page. The schema changes in place with nothing back-filled, so an existing database must be recreated. Model: opus-5-5
74 lines
2.2 KiB
Go
74 lines
2.2 KiB
Go
package database
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import (
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"fmt"
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"gorm.io/gorm"
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)
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// Totals is the single row of running totals in a webhook's event
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// database. It is what keeps the webhook page's lifetime figures right
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// after retention has removed the rows they count, and what lets the
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// page show them without counting every row.
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//
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// Storing an event, creating a delivery and failing a delivery each
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// add one, and retention adds what it deletes to the Removed columns.
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// Every addition goes through AddTotals, in the transaction that
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// writes or deletes the rows it counts.
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type Totals struct {
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ID int64 `gorm:"primaryKey"`
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Events int64 `gorm:"not null"`
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Deliveries int64 `gorm:"not null"`
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Failures int64 `gorm:"not null"`
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EventsRemoved int64 `gorm:"not null"`
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DeliveriesRemoved int64 `gorm:"not null"`
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FailuresRemoved int64 `gorm:"not null"`
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}
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// TableName names the table AddTotals updates.
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func (Totals) TableName() string {
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return "totals"
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}
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// EventsWithinRetention is how many of the webhook's events are still
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// stored.
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func (t Totals) EventsWithinRetention() int64 {
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return t.Events - t.EventsRemoved
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}
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// DeliveriesWithinRetention is how many of the webhook's deliveries
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// are still stored.
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func (t Totals) DeliveriesWithinRetention() int64 {
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return t.Deliveries - t.DeliveriesRemoved
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}
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// FailuresWithinRetention is how many of the webhook's failed
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// deliveries are still stored.
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func (t Totals) FailuresWithinRetention() int64 {
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return t.Failures - t.FailuresRemoved
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}
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// AddTotals adds each count in add to the webhook's running totals.
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// Call it on the transaction that writes or deletes the rows it
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// counts, so the totals change exactly when those rows do.
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func AddTotals(tx *gorm.DB, add Totals) error {
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err := tx.Exec(
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`UPDATE totals SET
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events = events + ?,
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deliveries = deliveries + ?,
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failures = failures + ?,
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events_removed = events_removed + ?,
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deliveries_removed = deliveries_removed + ?,
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failures_removed = failures_removed + ?`,
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add.Events, add.Deliveries, add.Failures,
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add.EventsRemoved, add.DeliveriesRemoved, add.FailuresRemoved,
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).Error
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if err != nil {
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return fmt.Errorf("adding to running totals: %w", err)
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}
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return nil
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}
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