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member_pool.go
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/
member_pool.go
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/*
* Copyright 2024 The Dragonfly Authors
*
* 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 pex
import (
"errors"
"sync"
"github.com/hashicorp/memberlist"
"golang.org/x/exp/maps"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"d7y.io/api/v2/pkg/apis/dfdaemon/v1"
logger "d7y.io/dragonfly/v2/internal/dflog"
)
var (
ErrAlreadyExists = errors.New("member is already exist")
ErrNotFound = errors.New("member not found")
)
func IsErrAlreadyExists(err error) bool {
if err == nil {
return false
}
if errors.Is(err, ErrAlreadyExists) {
return true
}
return status.Code(err) == codes.AlreadyExists
}
type memberPool struct {
localMember *MemberMeta
members *memberlist.Memberlist
peerPool *peerPool
lock *sync.RWMutex
sendReceivers map[string]PeerMetadataSendReceiveCloser
}
func newMemberPool(peerPool *peerPool) *memberPool {
return &memberPool{
lock: &sync.RWMutex{},
peerPool: peerPool,
sendReceivers: map[string]PeerMetadataSendReceiveCloser{},
}
}
func (mp *memberPool) MemberKeys() []string {
mp.lock.RLock()
keys := maps.Keys(mp.sendReceivers)
mp.lock.RUnlock()
return keys
}
func (mp *memberPool) FindMember(hostID string) (*MemberMeta, error) {
for _, member := range mp.members.Members() {
memberMeta, err := ExtractNodeMeta(member)
if err != nil {
logger.Errorf("extract node meta error: %s", err)
continue
}
if memberMeta.HostID == hostID {
return memberMeta, nil
}
}
return nil, ErrNotFound
}
func (mp *memberPool) Register(member *MemberMeta, sr PeerMetadataSendReceiveCloser) error {
hostID := member.HostID
mp.lock.Lock()
defer mp.lock.Unlock()
if _, ok := mp.sendReceivers[hostID]; ok {
return ErrAlreadyExists
}
mp.sendReceivers[hostID] = sr
logger.Infof("%s/%s registered", member.IP, hostID)
return nil
}
func (mp *memberPool) UnRegister(member *MemberMeta) {
hostID := member.HostID
mp.lock.Lock()
defer mp.lock.Unlock()
defer mp.peerPool.clean(hostID)
sr, ok := mp.sendReceivers[hostID]
if !ok {
return
}
delete(mp.sendReceivers, hostID)
logger.Infof("%s/%s unregistered", member.IP, hostID)
_ = sr.Close()
}
func (mp *memberPool) UnRegisterByHostID(hostID string) {
mp.lock.Lock()
defer mp.lock.Unlock()
defer mp.peerPool.clean(hostID)
sr, ok := mp.sendReceivers[hostID]
if !ok {
return
}
delete(mp.sendReceivers, hostID)
logger.Infof("%s unregistered", hostID)
_ = sr.Close()
}
func (mp *memberPool) IsRegistered(hostID string) bool {
mp.lock.RLock()
defer mp.lock.RUnlock()
_, ok := mp.sendReceivers[hostID]
return ok
}
func (mp *memberPool) broadcast(data *dfdaemon.PeerExchangeData) {
mp.lock.Lock()
defer mp.lock.Unlock()
// sync local cache
mp.peerPool.Sync(mp.localMember, data)
for hostID, sr := range mp.sendReceivers {
logger.Debugf("send peer metadata to host %s, peer count: %d", hostID, len(data.PeerMetadatas))
err := sr.Send(data)
if err != nil {
logger.Errorf("send peer metadata to host %s error: %s, UnRegister member in background", hostID, err)
go mp.UnRegisterByHostID(hostID)
}
}
}