/
dmap_expire.go
168 lines (152 loc) · 4.5 KB
/
dmap_expire.go
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// Copyright 2019 Burak Sezer
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package olric
import (
"fmt"
"time"
"github.com/buraksezer/olric/config"
"github.com/buraksezer/olric/internal/discovery"
"github.com/buraksezer/olric/internal/protocol"
"github.com/buraksezer/olric/internal/storage"
)
func (db *Olric) localExpire(hkey uint64, dm *dmap, w *writeop) error {
ttl := getTTL(w.timeout)
val := &storage.VData{
Timestamp: w.timestamp,
TTL: ttl,
}
err := dm.storage.UpdateTTL(hkey, val)
if err != nil {
if err == storage.ErrKeyNotFound {
err = ErrKeyNotFound
}
return err
}
dm.updateAccessLog(hkey)
return nil
}
func (db *Olric) asyncExpireOnCluster(hkey uint64, dm *dmap, w *writeop) error {
req := w.toReq(protocol.OpExpireReplica)
// Fire and forget mode.
owners := db.getBackupPartitionOwners(hkey)
for _, owner := range owners {
db.wg.Add(1)
go func(host discovery.Member) {
defer db.wg.Done()
_, err := db.requestTo(host.String(), protocol.OpExpireReplica, req)
if err != nil {
if db.log.V(3).Ok() {
db.log.V(3).Printf("[ERROR] Failed to set expire in async mode: %v", err)
}
}
}(owner)
}
return db.localPut(hkey, dm, w)
}
func (db *Olric) syncExpireOnCluster(hkey uint64, dm *dmap, w *writeop) error {
req := w.toReq(protocol.OpExpireReplica)
// Quorum based replication.
var successful int
owners := db.getBackupPartitionOwners(hkey)
for _, owner := range owners {
_, err := db.requestTo(owner.String(), protocol.OpExpireReplica, req)
if err != nil {
if db.log.V(3).Ok() {
db.log.V(3).Printf("[ERROR] Failed to call expire command on %s for DMap: %s: %v",
owner, w.dmap, err)
}
continue
}
successful++
}
err := db.localExpire(hkey, dm, w)
if err != nil {
if db.log.V(3).Ok() {
db.log.V(3).Printf("[ERROR] Failed to call expire command on %s for DMap: %s: %v",
db.this, w.dmap, err)
}
} else {
successful++
}
if successful >= db.config.WriteQuorum {
return nil
}
return ErrWriteQuorum
}
func (db *Olric) callExpireOnCluster(hkey uint64, w *writeop) error {
// Get the DMap and acquire its lock
dm, err := db.getDMap(w.dmap, hkey)
if err != nil {
return err
}
dm.Lock()
defer dm.Unlock()
if db.config.ReplicaCount == config.MinimumReplicaCount {
// MinimumReplicaCount is 1. So it's enough to put the key locally. There is no
// other replica host.
return db.localExpire(hkey, dm, w)
}
if db.config.ReplicationMode == config.AsyncReplicationMode {
return db.asyncExpireOnCluster(hkey, dm, w)
} else if db.config.ReplicationMode == config.SyncReplicationMode {
return db.syncExpireOnCluster(hkey, dm, w)
}
return fmt.Errorf("invalid replication mode: %v", db.config.ReplicationMode)
}
func (db *Olric) expire(w *writeop) error {
member, hkey := db.findPartitionOwner(w.dmap, w.key)
if hostCmp(member, db.this) {
// We are on the partition owner.
return db.callExpireOnCluster(hkey, w)
}
// Redirect to the partition owner
req := &protocol.Message{
DMap: w.dmap,
Key: w.key,
Extra: protocol.ExpireExtra{
TTL: w.timeout.Nanoseconds(),
Timestamp: w.timestamp,
},
}
_, err := db.requestTo(member.String(), protocol.OpExpire, req)
return err
}
func (db *Olric) expireReplicaOperation(req *protocol.Message) *protocol.Message {
hkey := db.getHKey(req.DMap, req.Key)
dm, err := db.getBackupDMap(req.DMap, hkey)
if err != nil {
return db.prepareResponse(req, err)
}
dm.Lock()
defer dm.Unlock()
w := &writeop{}
w.fromReq(req)
return db.prepareResponse(req, db.localExpire(hkey, dm, w))
}
func (db *Olric) exExpireOperation(req *protocol.Message) *protocol.Message {
w := &writeop{}
w.fromReq(req)
return db.prepareResponse(req, db.expire(w))
}
// Expire updates the expiry for the given key. It returns ErrKeyNotFound if the
// DB does not contains the key. It's thread-safe.
func (dm *DMap) Expire(key string, timeout time.Duration) error {
w := &writeop{
dmap: dm.name,
key: key,
timestamp: time.Now().UnixNano(),
timeout: timeout,
}
return dm.db.expire(w)
}