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// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package cron
import (
"context"
"fmt"
"reflect"
"sync"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/setting"
)
var lock = sync.Mutex{}
var started = false
var tasks = []*Task{}
var tasksMap = map[string]*Task{}
// Task represents a Cron task
type Task struct {
lock sync.Mutex
Name string
config Config
fun func(context.Context, *models.User, Config) error
ExecTimes int64
}
// DoRunAtStart returns if this task should run at the start
func (t *Task) DoRunAtStart() bool {
return t.config.DoRunAtStart()
}
// IsEnabled returns if this task is enabled as cron task
func (t *Task) IsEnabled() bool {
return t.config.IsEnabled()
}
// GetConfig will return a copy of the task's config
func (t *Task) GetConfig() Config {
if reflect.TypeOf(t.config).Kind() == reflect.Ptr {
// Pointer:
return reflect.New(reflect.ValueOf(t.config).Elem().Type()).Interface().(Config)
}
// Not pointer:
return reflect.New(reflect.TypeOf(t.config)).Elem().Interface().(Config)
}
// Run will run the task incrementing the cron counter with no user defined
func (t *Task) Run() {
t.RunWithUser(&models.User{
ID: -1,
Name: "(Cron)",
LowerName: "(cron)",
}, t.config)
}
// RunWithUser will run the task incrementing the cron counter at the time with User
func (t *Task) RunWithUser(doer *models.User, config Config) {
if !taskStatusTable.StartIfNotRunning(t.Name) {
return
}
t.lock.Lock()
if config == nil {
config = t.config
}
t.ExecTimes++
t.lock.Unlock()
defer func() {
taskStatusTable.Stop(t.Name)
if err := recover(); err != nil {
// Recover a panic within the
combinedErr := fmt.Errorf("%s\n%s", err, log.Stack(2))
log.Error("PANIC whilst running task: %s Value: %v", t.Name, combinedErr)
}
}()
graceful.GetManager().RunWithShutdownContext(func(baseCtx context.Context) {
ctx, cancel := context.WithCancel(baseCtx)
defer cancel()
pm := process.GetManager()
pid := pm.Add(config.FormatMessage(t.Name, "process", doer), cancel)
defer pm.Remove(pid)
if err := t.fun(ctx, doer, config); err != nil {
if models.IsErrCancelled(err) {
message := err.(models.ErrCancelled).Message
if err := models.CreateNotice(models.NoticeTask, config.FormatMessage(t.Name, "aborted", doer, message)); err != nil {
log.Error("CreateNotice: %v", err)
}
return
}
if err := models.CreateNotice(models.NoticeTask, config.FormatMessage(t.Name, "error", doer, err)); err != nil {
log.Error("CreateNotice: %v", err)
}
return
}
if config.DoNoticeOnSuccess() {
if err := models.CreateNotice(models.NoticeTask, config.FormatMessage(t.Name, "finished", doer)); err != nil {
log.Error("CreateNotice: %v", err)
}
}
})
}
// GetTask gets the named task
func GetTask(name string) *Task {
lock.Lock()
defer lock.Unlock()
log.Info("Getting %s in %v", name, tasksMap[name])
return tasksMap[name]
}
// RegisterTask allows a task to be registered with the cron service
func RegisterTask(name string, config Config, fun func(context.Context, *models.User, Config) error) error {
log.Debug("Registering task: %s", name)
_, err := setting.GetCronSettings(name, config)
if err != nil {
log.Error("Unable to register cron task with name: %s Error: %v", name, err)
return err
}
task := &Task{
Name: name,
config: config,
fun: fun,
}
lock.Lock()
locked := true
defer func() {
if locked {
lock.Unlock()
}
}()
if _, has := tasksMap[task.Name]; has {
log.Error("A task with this name: %s has already been registered", name)
return fmt.Errorf("duplicate task with name: %s", task.Name)
}
if config.IsEnabled() {
// We cannot use the entry return as there is no way to lock it
if _, err = c.AddJob(name, config.GetSchedule(), task); err != nil {
log.Error("Unable to register cron task with name: %s Error: %v", name, err)
return err
}
}
tasks = append(tasks, task)
tasksMap[task.Name] = task
if started && config.IsEnabled() && config.DoRunAtStart() {
lock.Unlock()
locked = false
task.Run()
}
return nil
}
// RegisterTaskFatal will register a task but if there is an error log.Fatal
func RegisterTaskFatal(name string, config Config, fun func(context.Context, *models.User, Config) error) {
if err := RegisterTask(name, config, fun); err != nil {
log.Fatal("Unable to register cron task %s Error: %v", name, err)
}
}
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