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task_manager.go
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/
task_manager.go
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/*
* Copyright 2020 The Dragonfly Authors
*
* 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.
*/
//go:generate mockgen -destination task_manager_mock.go -source task_manager.go -package resource
package resource
import (
"sync"
pkggc "d7y.io/dragonfly/v2/pkg/gc"
"d7y.io/dragonfly/v2/scheduler/config"
)
const (
// GC task id.
GCTaskID = "task"
)
type TaskManager interface {
// Load returns task for a key.
Load(string) (*Task, bool)
// Store sets task.
Store(*Task)
// LoadOrStore returns task the key if present.
// Otherwise, it stores and returns the given task.
// The loaded result is true if the task was loaded, false if stored.
LoadOrStore(*Task) (*Task, bool)
// Delete deletes task for a key.
Delete(string)
// Try to reclaim task.
RunGC() error
}
type taskManager struct {
// Task sync map.
*sync.Map
}
// New task manager interface.
func newTaskManager(cfg *config.GCConfig, gc pkggc.GC) (TaskManager, error) {
t := &taskManager{
Map: &sync.Map{},
}
if err := gc.Add(pkggc.Task{
ID: GCTaskID,
Interval: cfg.TaskGCInterval,
Timeout: cfg.TaskGCInterval,
Runner: t,
}); err != nil {
return nil, err
}
return t, nil
}
func (t *taskManager) Load(key string) (*Task, bool) {
rawTask, ok := t.Map.Load(key)
if !ok {
return nil, false
}
return rawTask.(*Task), ok
}
func (t *taskManager) Store(task *Task) {
t.Map.Store(task.ID, task)
}
func (t *taskManager) LoadOrStore(task *Task) (*Task, bool) {
rawTask, loaded := t.Map.LoadOrStore(task.ID, task)
return rawTask.(*Task), loaded
}
func (t *taskManager) Delete(key string) {
t.Map.Delete(key)
}
func (t *taskManager) RunGC() error {
t.Map.Range(func(_, value any) bool {
task, ok := value.(*Task)
if !ok {
task.Log.Error("invalid task")
return true
}
// If task state is TaskStateLeave, it will be reclaimed.
if task.FSM.Is(TaskStateLeave) {
task.Log.Info("task has been reclaimed")
t.Delete(task.ID)
return true
}
// If there is no peer then switch the task state to TaskStateLeave.
if task.PeerCount() == 0 {
if err := task.FSM.Event(TaskEventLeave); err != nil {
task.Log.Errorf("task fsm event failed: %s", err.Error())
return true
}
task.Log.Info("task peer count is zero, causing the task to leave")
}
return true
})
return nil
}