mirror of https://github.com/milvus-io/milvus.git
102 lines
2.4 KiB
Go
102 lines
2.4 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
|
|
//
|
|
// 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 datacoord
|
|
|
|
import (
|
|
"context"
|
|
"sync"
|
|
|
|
"github.com/milvus-io/milvus/internal/types"
|
|
)
|
|
|
|
const retryTimes = 2
|
|
|
|
type sessionManager interface {
|
|
getOrCreateSession(addr string) (types.DataNode, error)
|
|
releaseSession(addr string)
|
|
release()
|
|
}
|
|
|
|
type clusterSessionManager struct {
|
|
sync.RWMutex
|
|
ctx context.Context
|
|
sessions map[string]types.DataNode
|
|
dataClientCreator dataNodeCreatorFunc
|
|
}
|
|
|
|
func newClusterSessionManager(ctx context.Context, dataClientCreator dataNodeCreatorFunc) *clusterSessionManager {
|
|
return &clusterSessionManager{
|
|
ctx: ctx,
|
|
sessions: make(map[string]types.DataNode),
|
|
dataClientCreator: dataClientCreator,
|
|
}
|
|
}
|
|
|
|
// lock acquired
|
|
func (m *clusterSessionManager) createSession(addr string) (types.DataNode, error) {
|
|
cli, err := m.dataClientCreator(m.ctx, addr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if err := cli.Init(); err != nil {
|
|
return nil, err
|
|
}
|
|
if err := cli.Start(); err != nil {
|
|
return nil, err
|
|
}
|
|
m.sessions[addr] = cli
|
|
return cli, nil
|
|
}
|
|
|
|
// entry function
|
|
func (m *clusterSessionManager) getOrCreateSession(addr string) (types.DataNode, error) {
|
|
m.RLock()
|
|
dn, has := m.sessions[addr]
|
|
m.RUnlock()
|
|
if has {
|
|
return dn, nil
|
|
}
|
|
m.Lock()
|
|
defer m.Unlock()
|
|
dn, has = m.sessions[addr]
|
|
if has {
|
|
return dn, nil
|
|
}
|
|
dn, err := m.createSession(addr)
|
|
return dn, err
|
|
}
|
|
|
|
// // lock acquired
|
|
// func (m *clusterSessionManager) hasSession(addr string) bool {
|
|
// _, ok := m.sessions[addr]
|
|
// return ok
|
|
// }
|
|
|
|
func (m *clusterSessionManager) releaseSession(addr string) {
|
|
m.Lock()
|
|
defer m.Unlock()
|
|
cli, ok := m.sessions[addr]
|
|
if !ok {
|
|
return
|
|
}
|
|
_ = cli.Stop()
|
|
delete(m.sessions, addr)
|
|
}
|
|
|
|
func (m *clusterSessionManager) release() {
|
|
m.Lock()
|
|
defer m.Unlock()
|
|
for _, cli := range m.sessions {
|
|
_ = cli.Stop()
|
|
}
|
|
m.sessions = map[string]types.DataNode{}
|
|
}
|