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125 lines
3.1 KiB
Go
125 lines
3.1 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package datanode
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import (
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"errors"
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"sync"
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"github.com/milvus-io/milvus/internal/kv"
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"github.com/milvus-io/milvus/internal/proto/internalpb"
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)
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// errStart used for retry start
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var errStart = errors.New("start")
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// flushInsertTask defines action for flush insert
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type flushInsertTask interface {
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flushInsertData() error
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}
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// flushDeleteTask defines action for flush delete
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type flushDeleteTask interface {
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flushDeleteData() error
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}
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// flushTaskRunner controls a single flush task lifetime
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// this runner will wait insert data flush & del data flush done
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// then call the notifyFunc
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type flushTaskRunner struct {
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sync.WaitGroup
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kv.BaseKV
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initOnce sync.Once
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insertOnce sync.Once
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deleteOnce sync.Once
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startSignal <-chan struct{}
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finishSignal chan struct{}
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segmentID UniqueID
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insertLogs []string
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statsLogs []string
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deltaLogs []string
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pos *internalpb.MsgPosition
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}
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// init initializes flushTaskRunner with provided actions and signal
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func (t *flushTaskRunner) init(f notifyMetaFunc, postFunc taskPostFunc, signal <-chan struct{}) {
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t.initOnce.Do(func() {
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t.startSignal = signal
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t.finishSignal = make(chan struct{})
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go t.waitFinish(f, postFunc)
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})
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}
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// runFlushInsert executei flush insert task with once and retry
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func (t *flushTaskRunner) runFlushInsert(task flushInsertTask) {
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t.insertOnce.Do(func() {
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go func() {
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err := errStart
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for err != nil {
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err = task.flushInsertData()
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}
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t.Done()
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}()
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})
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}
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// runFlushDel execute flush delete task with once and retry
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func (t *flushTaskRunner) runFlushDel(task flushDeleteTask) {
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t.deleteOnce.Do(func() {
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go func() {
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err := errStart
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for err != nil {
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err = task.flushDeleteData()
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}
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t.Done()
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}()
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})
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}
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// waitFinish waits flush & insert done
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func (t *flushTaskRunner) waitFinish(notifyFunc notifyMetaFunc, postFunc taskPostFunc) {
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// wait insert & del done
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t.Wait()
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// wait previous task done
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<-t.startSignal
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notifyFunc(&segmentFlushPack{
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segmentID: t.segmentID,
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insertLogs: t.insertLogs,
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statsLogs: t.statsLogs,
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deltaLogs: t.deltaLogs,
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pos: t.pos,
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})
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// notify next task
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close(t.finishSignal)
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postFunc()
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}
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// newFlushTaskRunner create a usable task runner
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func newFlushTaskRunner() *flushTaskRunner {
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t := &flushTaskRunner{
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WaitGroup: sync.WaitGroup{},
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}
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// insert & del
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t.Add(2)
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return t
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}
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