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https://github.com/deepaksinghvi/cdule
cdule (pronounce as Schedule) Golang based scheduler library with database support.
https://github.com/deepaksinghvi/cdule
golang-scheduler quartz quartz-go quartz-golang quartz-scheduler scheduler
Last synced: 14 days ago
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cdule (pronounce as Schedule) Golang based scheduler library with database support.
- Host: GitHub
- URL: https://github.com/deepaksinghvi/cdule
- Owner: deepaksinghvi
- License: mit
- Created: 2022-02-12T11:49:51.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2022-11-27T09:17:28.000Z (almost 2 years ago)
- Last Synced: 2024-07-31T20:52:03.451Z (3 months ago)
- Topics: golang-scheduler, quartz, quartz-go, quartz-golang, quartz-scheduler, scheduler
- Language: Go
- Homepage:
- Size: 374 KB
- Stars: 47
- Watchers: 3
- Forks: 9
- Open Issues: 4
-
Metadata Files:
- Readme: Readme.MD
- License: LICENSE
Awesome Lists containing this project
- awesome-go - cdule - Job scheduler library with database support (Job Scheduler / Search and Analytic Databases)
- awesome-go-extra - cdule - 02-12T11:49:51Z|2022-05-01T11:07:37Z| (Job Scheduler / Advanced Console UIs)
README
# cdule (pronounce as Schedule)
Golang based scheduler library with database support.
Users could use any database which is supported by [gorm.io](https://gorm.io/).
### To Download the cdule library
```shell
go get github.com/deepaksinghvi/cdule
```
### Usage Instruction
In order to schedule jobs with cdule, user needs to
1. Configure persistence
2. Implement cdule.Job Interface &
3. Schedule job with required cron expression.
Job will be persisted in the jobs table.\
Next execution would be persisted in schedules tables.\
Job history would be persisted and maintained in job_histories table.
## Configuration
User needs to create a resources/config.yml in their project home directory with the followling keys
* cduletype
* dburl
* cduleconsistency
cduletype is used to specify whether it is an In-Memory or Database based configuration. Possible values are DATABASE and MEMORY.
dburl is the database connection url.
cduleconsistency is for reserved for future usage.
### config.yml for postgressql based configuration
```yaml
cduletype: DATABASE
dburl: postgres://cduleuser:cdulepassword@localhost:5432/cdule?sslmode=disable
cduleconsistency: AT_MOST_ONCE
```
### config.yml for sqlite based in-memory configuration
```yaml
cduletype: MEMORY
dburl: /Users/dsinghvi/sqlite.db
cduleconsistency: AT_MOST_ONCE
```
## Job Interface Implementation
```go
var testJobData map[string]string
type TestJob struct {
Job cdule.Job
}
func (m TestJob) Execute(jobData map[string]string) {
log.Info("In TestJob")
for k, v := range jobData {
valNum, err := strconv.Atoi(v)
if nil == err {
jobData[k] = strconv.Itoa(valNum + 1)
} else {
log.Error(err)
}
}
testJobData = jobData
}
func (m TestJob) JobName() string {
return "job.TestJob"
}
func (m TestJob) GetJobData() map[string]string {
return testJobData
}
```
## Schedule a Job
It is expected that testJob will be Executed five times, once for every minute and program will exit. TestJob jobData map holds the data in the format of map[string]string where gets stored for every execution and gets updated as the next counter value on Execute() method call.
```go
cdule := cdule.Cdule{}
cdule.NewCdule()
testJob := TestJob{}
jobData := make(map[string]string)
jobData["one"] = "1"
jobData["two"] = "2"
jobData["three"] = "3"
cdule.NewJob(&testJob, jobData).Build(utils.EveryMinute)
time.Sleep(5 * time.Minute)
cdule.StopWatcher()
```
### Demo Project
This demo describes how cdule library can be used.
https://github.com/deepaksinghvi/cduledemo
### Database Schema
For the sample app, postgresql is used but users can use any db which is supported by gorm.io.
#### DB Tables
* jobs : To store unique jobs.
* job_histories : To store job history with status as result.
* schedules : To store schedule for every next run.
* workers : To store the worker nodes and their health check.
### Sample Cron
Users can use the pre-defined crons or use their own which are the [standard cron](https://en.wikipedia.org/wiki/Cron) expression
```go
EveryMinute = "0 * * ? * *"
EveryEvenMinute = "0 */2 * ? * *"
EveryUnEvenMinute = "0 1/2 * ? * *"
EveryTwoMinutes = "0 */2 * ? * *"
EveryHourAtMin153045 = "0 15,30,45 * ? * *"
EveryHour = "0 0 * ? * *"
EveryEvenHour = "0 0 0/2 ? * *"
EveryUnEvenHour = "0 0 1/2 ? * *"
EveryThreeHours = "0 0 */3 ? * *"
EveryTwelveHours = "0 0 */12 ? * *"
EveryDayAtMidNight = "0 0 0 * * ?"
EveryDayAtOneAM = "0 0 1 * * ?"
EveryDayAtSixAM = "0 0 6 * * ?"
EverySundayAtNoon = "0 0 12 ? * "
EveryMondayAtNoon = "0 0 12 ? *"
EveryWeekDayAtNoon = "0 0 12 ? * MON-FRI"
EveryWeekEndAtNoon = "0 0 12 ? * SUN,SAT"
EveryMonthOnFirstAtNoon = "0 0 12 1 * ?"
EveryMonthOnSecondAtNoon = "0 0 12 2 * ?"
```
### This library is built using
* Cron parser using the library [robfig/cron](https://github.com/robfig/cron)
* ORM usign the library [gorm.io](https://gorm.io/)
### Other Reports
pkg.go.dev: https://pkg.go.dev/github.com/deepaksinghvi/cdule
goreportcard.com: https://goreportcard.com/report/github.com/deepaksinghvi/cdule
coverage service link: https://app.codecov.io/gh/deepaksinghvi/cdule