mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-11-30 19:08:30 +08:00
95 lines
2.2 KiB
Go
95 lines
2.2 KiB
Go
// Licensed to the LF AI & Data foundation under one
|
|
// or more contributor license agreements. See the NOTICE file
|
|
// distributed with this work for additional information
|
|
// regarding copyright ownership. The ASF licenses this file
|
|
// to you 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"
|
|
"errors"
|
|
"fmt"
|
|
"sync"
|
|
|
|
"github.com/milvus-io/milvus/internal/types"
|
|
)
|
|
|
|
var errDisposed = errors.New("client is disposed")
|
|
|
|
// NodeInfo contains node base info
|
|
type NodeInfo struct {
|
|
NodeID int64
|
|
Address string
|
|
}
|
|
|
|
// Session contains session info of a node
|
|
type Session struct {
|
|
sync.Mutex
|
|
info *NodeInfo
|
|
client types.DataNode
|
|
clientCreator dataNodeCreatorFunc
|
|
isDisposed bool
|
|
}
|
|
|
|
// NewSession create a new session
|
|
func NewSession(info *NodeInfo, creator dataNodeCreatorFunc) *Session {
|
|
return &Session{
|
|
info: info,
|
|
clientCreator: creator,
|
|
}
|
|
}
|
|
|
|
// GetOrCreateClient gets or creates a new client for session
|
|
func (n *Session) GetOrCreateClient(ctx context.Context) (types.DataNode, error) {
|
|
n.Lock()
|
|
defer n.Unlock()
|
|
|
|
if n.isDisposed {
|
|
return nil, errDisposed
|
|
}
|
|
|
|
if n.client != nil {
|
|
return n.client, nil
|
|
}
|
|
|
|
if n.clientCreator == nil {
|
|
return nil, fmt.Errorf("unable to create client for %s beacause of a nil client creator", n.info.Address)
|
|
}
|
|
|
|
err := n.initClient(ctx)
|
|
return n.client, err
|
|
}
|
|
|
|
func (n *Session) initClient(ctx context.Context) (err error) {
|
|
if n.client, err = n.clientCreator(ctx, n.info.Address); err != nil {
|
|
return
|
|
}
|
|
if err = n.client.Init(); err != nil {
|
|
return
|
|
}
|
|
return n.client.Start()
|
|
}
|
|
|
|
// Dispose release client connection
|
|
func (n *Session) Dispose() {
|
|
n.Lock()
|
|
defer n.Unlock()
|
|
|
|
if n.client != nil {
|
|
n.client.Stop()
|
|
n.client = nil
|
|
}
|
|
n.isDisposed = true
|
|
}
|