/
scheduler.go
84 lines (69 loc) · 2.39 KB
/
scheduler.go
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// Copyright 2020 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package logsearch
import (
"sync"
"github.com/pingcap/log"
"go.uber.org/zap"
)
const (
TaskMaxPreviewLines = 500
TaskGroupMaxPreviewLines = 5000
)
type Scheduler struct {
runningTaskGroups sync.Map
service *Service
}
func NewScheduler(service *Service) *Scheduler {
return &Scheduler{
runningTaskGroups: sync.Map{},
service: service,
}
}
func (s *Scheduler) AsyncStart(taskGroupModel *TaskGroupModel, tasksModel []*TaskModel) bool {
log.Debug("Scheduler start task group", zap.Uint("task_group_id", taskGroupModel.ID))
previewsLinesPerTask := TaskGroupMaxPreviewLines / len(tasksModel)
if previewsLinesPerTask > TaskMaxPreviewLines {
previewsLinesPerTask = TaskMaxPreviewLines
}
taskGroup := &TaskGroup{
service: s.service,
model: taskGroupModel,
tasks: nil, // Tasks are created only after successfully adding to the sync map.
tasksMu: sync.Mutex{},
maxPreviewLinesPerTask: previewsLinesPerTask,
}
_, alreadyRunning := s.runningTaskGroups.LoadOrStore(taskGroup.model.ID, taskGroup)
if alreadyRunning {
log.Warn("Scheduler start task group failed, task group is already running", zap.Uint("task_group_id", taskGroupModel.ID))
return false
}
taskGroup.InitTasks(s.service.lifecycleCtx, tasksModel)
go func() {
taskGroup.SyncRun()
s.runningTaskGroups.Delete(taskGroup.model.ID)
log.Debug("Scheduler task group finished", zap.Uint("task_group_id", taskGroupModel.ID))
}()
return true
}
func (s *Scheduler) AsyncAbort(taskGroupID uint) bool {
log.Debug("Scheduler abort task group", zap.Uint("task_group_id", taskGroupID))
v, ok := s.runningTaskGroups.Load(taskGroupID)
if !ok {
log.Warn("Scheduler abort task group failed, task group is not running", zap.Uint("task_group_id", taskGroupID))
return false
}
taskGroup := v.(*TaskGroup)
taskGroup.AbortAll()
return true
}