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Fix GC deleting values without expiry (#54)

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* Test MYSQL Fix

* Test

* Add postgres

* Fix mysql

* Fix sqlite
This commit is contained in:
hi019
2021-03-18 17:09:06 -04:00
committed by GitHub
parent 9829073dd7
commit a66230ef17
6 changed files with 108 additions and 15 deletions
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15
mysql/mysql.go
View File

@@ -82,11 +82,11 @@ func New(config ...Config) *Storage {
sqlInsert: fmt.Sprintf("INSERT INTO %s (k, v, e) VALUES (?,?,?) ON DUPLICATE KEY UPDATE v = ?, e = ?", cfg.Table),
sqlDelete: fmt.Sprintf("DELETE FROM %s WHERE k=?", cfg.Table),
sqlReset: fmt.Sprintf("DELETE FROM %s;", cfg.Table),
sqlGC: fmt.Sprintf("DELETE FROM %s WHERE e <= ?", cfg.Table),
sqlGC: fmt.Sprintf("DELETE FROM %s WHERE e <= ? AND e != 0", cfg.Table),
}
// Start garbage collector
go store.gc()
go store.gcTicker()
return store
}
@@ -160,8 +160,8 @@ func (s *Storage) Close() error {
return s.db.Close()
}
// Garbage collector to delete expired keys
func (s *Storage) gc() {
// gcTicker starts the gc ticker
func (s *Storage) gcTicker() {
ticker := time.NewTicker(s.gcInterval)
defer ticker.Stop()
for {
@@ -169,7 +169,12 @@ func (s *Storage) gc() {
case <-s.done:
return
case t := <-ticker.C:
_, _ = s.db.Exec(s.sqlGC, t.Unix())
s.gc(t)
}
}
}
// gc deletes all expired entries
func (s *Storage) gc(t time.Time) {
_, _ = s.db.Exec(s.sqlGC, t.Unix())
}

26
mysql/mysql_test.go
View File

@@ -1,6 +1,7 @@
package mysql
import (
"database/sql"
"os"
"testing"
"time"
@@ -122,6 +123,31 @@ func Test_MYSQL_Reset(t *testing.T) {
utils.AssertEqual(t, true, len(result) == 0)
}
func Test_MYSQL_GC(t *testing.T) {
var (
testVal = []byte("doe")
)
// This key should expire
err := testStore.Set("john", testVal, time.Nanosecond)
utils.AssertEqual(t, nil, err)
testStore.gc(time.Now())
row := testStore.db.QueryRow(testStore.sqlSelect, "john")
err = row.Scan(nil, nil)
utils.AssertEqual(t, sql.ErrNoRows, err)
// This key should not expire
err = testStore.Set("john", testVal, 0)
utils.AssertEqual(t, nil, err)
testStore.gc(time.Now())
val, err := testStore.Get("john")
utils.AssertEqual(t, nil, err)
utils.AssertEqual(t, testVal, val)
}
func Test_MYSQL_Close(t *testing.T) {
utils.AssertEqual(t, nil, testStore.Close())
}