mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-12-03 04:19:18 +08:00
88 lines
1.8 KiB
Go
88 lines
1.8 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "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 distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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package querynode
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import (
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"context"
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"sync"
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"github.com/milvus-io/milvus/internal/log"
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)
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type taskScheduler struct {
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ctx context.Context
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cancel context.CancelFunc
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wg sync.WaitGroup
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queue taskQueue
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}
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func newTaskScheduler(ctx context.Context) *taskScheduler {
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ctx1, cancel := context.WithCancel(ctx)
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s := &taskScheduler{
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ctx: ctx1,
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cancel: cancel,
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}
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s.queue = newLoadAndReleaseTaskQueue(s)
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return s
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}
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func (s *taskScheduler) processTask(t task, q taskQueue) {
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// TODO: ctx?
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err := t.PreExecute(s.ctx)
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defer func() {
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t.Notify(err)
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}()
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if err != nil {
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log.Error(err.Error())
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return
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}
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q.AddActiveTask(t)
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defer func() {
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q.PopActiveTask(t.ID())
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}()
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err = t.Execute(s.ctx)
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if err != nil {
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log.Error(err.Error())
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return
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}
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err = t.PostExecute(s.ctx)
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}
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func (s *taskScheduler) loadAndReleaseLoop() {
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defer s.wg.Done()
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for {
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select {
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case <-s.ctx.Done():
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return
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case <-s.queue.utChan():
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if !s.queue.utEmpty() {
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t := s.queue.PopUnissuedTask()
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s.processTask(t, s.queue)
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}
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}
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}
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}
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func (s *taskScheduler) Start() {
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s.wg.Add(1)
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go s.loadAndReleaseLoop()
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}
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func (s *taskScheduler) Close() {
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s.cancel()
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s.wg.Wait()
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}
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