milvus/internal/rootcoord/dml_channels.go
congqixia 88e319acda
Save start position in collection meta (#8682)
Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>
2021-09-27 18:10:00 +08:00

155 lines
4.2 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 rootcoord
import (
"fmt"
"sync"
"go.uber.org/atomic"
"go.uber.org/zap"
"github.com/milvus-io/milvus/internal/log"
"github.com/milvus-io/milvus/internal/msgstream"
)
type dmlChannels struct {
core *Core
namePrefix string
capacity int64
refcnt sync.Map
idx *atomic.Int64
pool sync.Map
}
func newDmlChannels(c *Core, chanNamePrefix string, chanNum int64) *dmlChannels {
d := &dmlChannels{
core: c,
namePrefix: chanNamePrefix,
capacity: chanNum,
refcnt: sync.Map{},
idx: atomic.NewInt64(0),
pool: sync.Map{},
}
var i int64
for i = 0; i < chanNum; i++ {
name := fmt.Sprintf("%s_%d", d.namePrefix, i)
ms, err := c.msFactory.NewMsgStream(c.ctx)
if err != nil {
log.Error("add msgstream failed", zap.String("name", name), zap.Error(err))
panic("add msgstream failed")
}
ms.AsProducer([]string{name})
d.pool.Store(name, &ms)
}
log.Debug("init dml channels", zap.Int64("num", chanNum))
return d
}
func (d *dmlChannels) GetDmlMsgStreamName() string {
cnt := d.idx.Load()
name := fmt.Sprintf("%s_%d", d.namePrefix, cnt)
d.idx.Store((cnt + 1) % d.capacity)
return name
}
// ListChannels lists all dml channel names
func (d *dmlChannels) ListChannels() []string {
chanNames := make([]string, 0)
d.refcnt.Range(
func(k, v interface{}) bool {
chanNames = append(chanNames, k.(string))
return true
})
return chanNames
}
// GetNumChannels get current dml channel count
func (d *dmlChannels) GetNumChannels() int {
return len(d.ListChannels())
}
// Broadcast broadcasts msg pack into specified channel
func (d *dmlChannels) Broadcast(chanNames []string, pack *msgstream.MsgPack) error {
for _, chanName := range chanNames {
// only in-use chanName exist in refcnt
if _, ok := d.refcnt.Load(chanName); ok {
v, _ := d.pool.Load(chanName)
if err := (*(v.(*msgstream.MsgStream))).Broadcast(pack); err != nil {
return err
}
} else {
return fmt.Errorf("channel %s not exist", chanName)
}
}
return nil
}
// BroadcastMark broadcasts msg pack into specified channel and returns related message id
func (d *dmlChannels) BroadcastMark(chanNames []string, pack *msgstream.MsgPack) (map[string][]byte, error) {
result := make(map[string][]byte)
for _, chanName := range chanNames {
// only in-use chanName exist in refcnt
if _, ok := d.refcnt.Load(chanName); ok {
v, _ := d.pool.Load(chanName)
ids, err := (*(v.(*msgstream.MsgStream))).BroadcastMark(pack)
if err != nil {
return result, err
}
for chanName, idList := range ids {
// idList should have length 1, just flat by iteration
for _, id := range idList {
result[chanName] = id.Serialize()
}
}
} else {
return result, fmt.Errorf("channel %s not exist", chanName)
}
}
return result, nil
}
// AddProducerChannels add named channels as producer
func (d *dmlChannels) AddProducerChannels(names ...string) {
for _, name := range names {
if _, ok := d.pool.Load(name); ok {
var cnt int64
if _, ok := d.refcnt.Load(name); !ok {
cnt = 1
} else {
v, _ := d.refcnt.Load(name)
cnt = v.(int64) + 1
}
d.refcnt.Store(name, cnt)
log.Debug("assign dml channel", zap.String("chanName", name), zap.Int64("refcnt", cnt))
} else {
log.Error("invalid channel name", zap.String("chanName", name))
panic("invalid channel name: " + name)
}
}
}
// RemoveProducerChannels removes specified channels
func (d *dmlChannels) RemoveProducerChannels(names ...string) {
for _, name := range names {
if v, ok := d.refcnt.Load(name); ok {
cnt := v.(int64)
if cnt > 1 {
d.refcnt.Store(name, cnt-1)
} else {
d.refcnt.Delete(name)
}
}
}
}