88 lines
1.7 KiB
Go
88 lines
1.7 KiB
Go
package mailserver
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import (
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"sync"
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"time"
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"github.com/ethereum/go-ethereum/log"
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"github.com/status-im/status-go/common"
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)
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const (
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dbCleanerBatchSize = 1000
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dbCleanerPeriod = time.Hour
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)
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// dbCleaner removes old messages from a db.
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type dbCleaner struct {
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sync.RWMutex
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db DB
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batchSize int
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retention time.Duration
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period time.Duration
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cancel chan struct{}
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}
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// newDBCleaner returns a new cleaner for db.
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func newDBCleaner(db DB, retention time.Duration) *dbCleaner {
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return &dbCleaner{
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db: db,
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retention: retention,
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batchSize: dbCleanerBatchSize,
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period: dbCleanerPeriod,
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}
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}
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// Start starts a loop that cleans up old messages.
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func (c *dbCleaner) Start() {
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log.Info("Starting cleaning envelopes", "period", c.period, "retention", c.retention)
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cancel := make(chan struct{})
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c.Lock()
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c.cancel = cancel
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c.Unlock()
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go c.schedule(c.period, cancel)
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}
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// Stops stops the cleaning loop.
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func (c *dbCleaner) Stop() {
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c.Lock()
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defer c.Unlock()
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if c.cancel == nil {
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return
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}
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close(c.cancel)
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c.cancel = nil
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}
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func (c *dbCleaner) schedule(period time.Duration, cancel <-chan struct{}) {
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defer common.LogOnPanic()
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t := time.NewTicker(period)
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defer t.Stop()
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for {
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select {
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case <-t.C:
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count, err := c.PruneEntriesOlderThan(time.Now().Add(-c.retention))
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if err != nil {
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log.Error("failed to prune data", "err", err)
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}
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log.Info("Prunned some some messages successfully", "count", count)
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case <-cancel:
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return
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}
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}
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}
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// PruneEntriesOlderThan removes messages sent between lower and upper timestamps
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// and returns how many have been removed.
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func (c *dbCleaner) PruneEntriesOlderThan(t time.Time) (int, error) {
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return c.db.Prune(t, c.batchSize)
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}
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