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prune-expired-deliveries.go
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prune-expired-deliveries.go
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// Copyright (c) 2021 6 River Systems
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
package actions
import (
"context"
"time"
"go.6river.tech/mmmbbb/ent"
"go.6river.tech/mmmbbb/ent/delivery"
"go.6river.tech/mmmbbb/ent/subscription"
)
type PruneExpiredDeliveries struct {
pruneAction
}
var _ Action[PruneCommonParams, PruneCommonResults] = (*PruneExpiredDeliveries)(nil)
func NewPruneExpiredDeliveries(params PruneCommonParams) *PruneExpiredDeliveries {
return &PruneExpiredDeliveries{
pruneAction: newPruneAction(params),
}
}
var pruneExpiredDeliveriesCounter, pruneExpiredDeliveriesHistogram = pruneMetrics("expired_deliveries")
func (a *PruneExpiredDeliveries) Execute(ctx context.Context, tx *ent.Tx) error {
timer := startActionTimer(pruneExpiredDeliveriesHistogram, tx)
defer timer.Ended()
// NOTE: notification requires knowing the subs affected, so we require a
// specific MaxDelete for now. if ent could do limit on delete, plus returning
// clauses, then we could do this without the pre-query
var del *ent.DeliveryDelete
ids, err := tx.Delivery.Query().
Where(delivery.ExpiresAtLT(time.Now())).
Limit(a.params.MaxDelete).
IDs(ctx)
if err != nil {
return err
}
// we need to notify any subs using ordered delivery to refresh, same as if we ACKed
orderedSubs, err := tx.Subscription.Query().
Where(
subscription.OrderedDelivery(true),
subscription.HasDeliveriesWith(delivery.IDIn(ids...)),
).
Select(subscription.FieldID).
All(ctx)
if err != nil {
return err
}
del = tx.Delivery.Delete().Where(delivery.IDIn(ids...))
numDeleted, err := del.Exec(ctx)
if err != nil {
return err
}
// subscribers awaiting a publish on an ordered subscription may also
// be awaiting ack from a message we just deleted, so wake them up
if len(orderedSubs) != 0 {
tx.OnCommit(func(c ent.Committer) ent.Committer {
return ent.CommitFunc(func(ctx context.Context, tx *ent.Tx) error {
if err := c.Commit(ctx, tx); err != nil {
return err
}
for _, s := range orderedSubs {
WakePublishListeners(false, s.ID)
}
return nil
})
})
}
a.results = &PruneCommonResults{
NumDeleted: numDeleted,
}
timer.Succeeded(func() { pruneExpiredDeliveriesCounter.Add(float64(numDeleted)) })
return nil
}