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// Copyright (c) 2016 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package model
import (
"fmt"
"sync"
"time"
)
type TaskFunc func()
type ScheduledTask struct {
Name string `json:"name"`
Interval time.Duration `json:"interval"`
Recurring bool `json:"recurring"`
function TaskFunc
timer *time.Timer
}
var taskMutex = sync.Mutex{}
var tasks = make(map[string]*ScheduledTask)
func addTask(task *ScheduledTask) {
taskMutex.Lock()
defer taskMutex.Unlock()
tasks[task.Name] = task
}
func removeTaskByName(name string) {
taskMutex.Lock()
defer taskMutex.Unlock()
delete(tasks, name)
}
func GetTaskByName(name string) *ScheduledTask {
taskMutex.Lock()
defer taskMutex.Unlock()
if task, ok := tasks[name]; ok {
return task
}
return nil
}
func GetAllTasks() *map[string]*ScheduledTask {
taskMutex.Lock()
defer taskMutex.Unlock()
return &tasks
}
func CreateTask(name string, function TaskFunc, timeToExecution time.Duration) *ScheduledTask {
task := &ScheduledTask{
Name: name,
Interval: timeToExecution,
Recurring: false,
function: function,
}
taskRunner := func() {
go task.function()
removeTaskByName(task.Name)
}
task.timer = time.AfterFunc(timeToExecution, taskRunner)
addTask(task)
return task
}
func CreateRecurringTask(name string, function TaskFunc, interval time.Duration) *ScheduledTask {
task := &ScheduledTask{
Name: name,
Interval: interval,
Recurring: true,
function: function,
}
taskRecurer := func() {
go task.function()
task.timer.Reset(task.Interval)
}
task.timer = time.AfterFunc(interval, taskRecurer)
addTask(task)
return task
}
func (task *ScheduledTask) Cancel() {
task.timer.Stop()
removeTaskByName(task.Name)
}
// Executes the task immediatly. A recurring task will be run regularally after interval.
func (task *ScheduledTask) Execute() {
task.function()
task.timer.Reset(task.Interval)
}
func (task *ScheduledTask) String() string {
return fmt.Sprintf(
"%s\nInterval: %s\nRecurring: %t\n",
task.Name,
task.Interval.String(),
task.Recurring,
)
}
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