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cron.go
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cron.go
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// Copyright 2020 Douyu
//
// 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.
package xcron
import (
"sync/atomic"
"time"
"github.com/douyu/jupiter/pkg/util/xstring"
"github.com/douyu/jupiter/pkg/xlog"
"github.com/robfig/cron/v3"
)
var (
// Every ...
Every = cron.Every
// NewParser ...
NewParser = cron.NewParser
// NewChain ...
NewChain = cron.NewChain
// WithSeconds ...
WithSeconds = cron.WithSeconds
// WithParser ...
WithParser = cron.WithParser
// WithLocation ...
WithLocation = cron.WithLocation
)
type (
// JobWrapper ...
JobWrapper = cron.JobWrapper
// EntryID ...
EntryID = cron.EntryID
// Entry ...
Entry = cron.Entry
// Schedule ...
Schedule = cron.Schedule
// Parser ...
Parser = cron.Parser
// Option ...
Option = cron.Option
// Job ...
Job = cron.Job
//NamedJob ..
NamedJob interface {
Run() error
Name() string
}
)
// FuncJob ...
type FuncJob func() error
// Run ...
func (f FuncJob) Run() error { return f() }
// Name ...
func (f FuncJob) Name() string { return xstring.FunctionName(f) }
// Cron ...
type Cron struct {
*Config
*cron.Cron
entries map[string]EntryID
}
func newCron(config *Config) *Cron {
if config.logger == nil {
config.logger = xlog.JupiterLogger
}
config.logger = config.logger.With(xlog.FieldMod("worker.cron"))
cron := &Cron{
Config: config,
Cron: cron.New(
cron.WithParser(config.parser),
cron.WithChain(config.wrappers...),
cron.WithLogger(&wrappedLogger{config.logger}),
),
}
return cron
}
// Schedule ...
func (c *Cron) Schedule(schedule Schedule, job NamedJob) EntryID {
if c.ImmediatelyRun {
schedule = &immediatelyScheduler{
Schedule: schedule,
}
}
innnerJob := &wrappedJob{
NamedJob: job,
logger: c.logger,
distributedTask: c.DistributedTask,
waitLockTime: c.WaitLockTime,
leaseTTL: c.Config.TTL,
client: c.client,
}
// xdebug.PrintKVWithPrefix("worker", "add job", job.Name())
c.logger.Info("add job", xlog.String("name", job.Name()))
return c.Cron.Schedule(schedule, innnerJob)
}
// GetEntryByName ...
func (c *Cron) GetEntryByName(name string) cron.Entry {
// todo(gorexlv): data race
return c.Entry(c.entries[name])
}
// AddJob ...
func (c *Cron) AddJob(spec string, cmd NamedJob) (EntryID, error) {
schedule, err := c.parser.Parse(spec)
if err != nil {
return 0, err
}
return c.Schedule(schedule, cmd), nil
}
// AddFunc ...
func (c *Cron) AddFunc(spec string, cmd func() error) (EntryID, error) {
return c.AddJob(spec, FuncJob(cmd))
}
// Run ...
func (c *Cron) Run() error {
// xdebug.PrintKVWithPrefix("worker", "run worker", fmt.Sprintf("%d job scheduled", len(c.Cron.Entries())))
c.logger.Info("run worker", xlog.Int("number of scheduled jobs", len(c.Cron.Entries())))
c.Cron.Run()
return nil
}
// Stop ...
func (c *Cron) Stop() error {
_ = c.Cron.Stop()
return nil
}
type immediatelyScheduler struct {
Schedule
initOnce uint32
}
// Next ...
func (is *immediatelyScheduler) Next(curr time.Time) (next time.Time) {
if atomic.CompareAndSwapUint32(&is.initOnce, 0, 1) {
return curr
}
return is.Schedule.Next(curr)
}