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forgejo/services/cron/tasks.go
zeripath 90e0a402c1
Show last cron messages on monitor page ()
As discussed on  we should store the results of the last task message on the
crontask and show them on the monitor page.

Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
2022-03-29 02:31:07 +01:00

203 lines
5.3 KiB
Go

// 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"
admin_model "code.gitea.io/gitea/models/admin"
"code.gitea.io/gitea/models/db"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/translation"
)
var (
lock = sync.Mutex{}
started = false
tasks = []*Task{}
tasksMap = map[string]*Task{}
)
// Task represents a Cron task
type Task struct {
lock sync.Mutex
Name string
config Config
fun func(context.Context, *user_model.User, Config) error
Status string
LastMessage string
LastDoer string
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(&user_model.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 *user_model.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) {
pm := process.GetManager()
doerName := ""
if doer != nil && doer.ID != -1 {
doerName = doer.Name
}
ctx, _, finished := pm.AddContext(baseCtx, config.FormatMessage("en-US", t.Name, "process", doerName))
defer finished()
if err := t.fun(ctx, doer, config); err != nil {
var message string
var status string
if db.IsErrCancelled(err) {
status = "cancelled"
message = err.(db.ErrCancelled).Message
} else {
status = "error"
message = err.Error()
}
t.lock.Lock()
t.LastMessage = message
t.Status = status
t.LastDoer = doerName
t.lock.Unlock()
if err := admin_model.CreateNotice(ctx, admin_model.NoticeTask, config.FormatMessage("en-US", t.Name, "cancelled", doerName, message)); err != nil {
log.Error("CreateNotice: %v", err)
}
return
}
t.lock.Lock()
t.Status = "finished"
t.LastMessage = ""
t.LastDoer = doerName
t.lock.Unlock()
if config.DoNoticeOnSuccess() {
if err := admin_model.CreateNotice(ctx, admin_model.NoticeTask, config.FormatMessage("en-US", t.Name, "finished", doerName)); 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, *user_model.User, Config) error) error {
log.Debug("Registering task: %s", name)
i18nKey := "admin.dashboard." + name
if _, ok := translation.TryTr("en-US", i18nKey); !ok {
return fmt.Errorf("translation is missing for task %q, please add translation for %q", name, i18nKey)
}
_, 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, *user_model.User, Config) error) {
if err := RegisterTask(name, config, fun); err != nil {
log.Fatal("Unable to register cron task %s Error: %v", name, err)
}
}