Merge pull request #51 from manuelarte/v2

v2

Author: manuelarte

.github/workflows/go_test.yml

@@ -12,9 +12,9 @@ jobs:
     strategy:
       matrix:
         go-version:
-          - "1.20"
           - "1.21"
           - "1.22"
+          - "1.23"
     name: lint and test
     runs-on: ubuntu-latest
     steps:

README.md

@@ -1,14 +1,18 @@
 [![golangci-lint](https://github.com/go-co-op/gocron-gorm-lock/actions/workflows/go_test.yml/badge.svg)](https://github.com/go-co-op/gocron-gorm-lock/actions/workflows/go_test.yml)
-# gocron-gorm-lock
+![Go Report Card](https://goreportcard.com/badge/github.com/go-co-op/gocron-gorm-lock) 
+[![Go Doc](https://godoc.org/github.com/go-co-op/gocron-gorm-lock?status.svg)](https://pkg.go.dev/github.com/go-co-op/gocron-gorm-lock)
+
+# Gocron-Gorm-Lock
+
 A gocron locker implementation using gorm
 
-## install
+## ⬇️ Install
 
 ```
-go get github.com/go-co-op/gocron-gorm-lock
+go get github.com/go-co-op/gocron-gorm-lock@v2
 ```
 
-## usage
+## 📋 Usage
 
 Here is an example usage that would be deployed in multiple instances
 
@@ -18,56 +22,61 @@ package main
 import (
 	"fmt"
 
-	"github.com/go-co-op/gocron"
-	gormlock "github.com/go-co-op/gocron-gorm-lock"
+	"github.com/go-co-op/gocron/v2"
+	gormlock "github.com/go-co-op/gocron-gorm-lock/v2"
 	"gorm.io/gorm"
 	"time"
 )
 
 func main() {
 	var db * gorm.DB // gorm db connection
 	var worker string // name of this instance to be used to know which instance run the job
-	db.AutoMigrate(&CronJobLock{}) // We need the table to store the job execution
+	db.AutoMigrate(&gormlock.CronJobLock{}) // We need the table to store the job execution
 	locker, err := gormlock.NewGormLocker(db, worker)
-	if err != nil {
-		// handle the error
-	}
+	// handle the error
+	
+	s, err := gocron.NewScheduler(gocron.WithDistributedLocker(locker))
+	// handle the error
 
-	s := gocron.NewScheduler(time.UTC)
-	s.WithDistributedLocker(locker)
-
-	_, err = s.Every("1s").Name("unique_name").Do(func() {
+	f := func() {
 		// task to do
 		fmt.Println("call 1s")
-	})
+	}
+	
+	_, err = s.NewJob(gocron.DurationJob(1*time.Second), gocron.NewTask(f), gocron.WithName("unique_name"))
 	if err != nil {
 		// handle the error
 	}
 
-	s.StartBlocking()
+	s.Start()
 }
 ```
 
+To check a real use case example, check [examples](./examples).
+
 ## Prerequisites
 
-- The table cron_job_locks needs to exist in the database. This can be achieved, as an example, using gorm automigrate functionality `db.Automigrate(&CronJobLock{})`
-- In order to uniquely identify the job, the locker uses the unique combination of the job name + timestamp (by default with precision to seconds).
-
-## FAQ
-
-- Q: The locker uses the unique combination of the job name + timestamp with seconds precision, how can I change that?
-    - A: It's possible to change the timestamp precision used to uniquely identify the job, here is an example to set an hour precision:
-      ```go
-      locker, err := gormlock.NewGormLocker(db, "local", gormlock.WithDefaultJobIdentifier(60 * time.Minute))
-      ```
-- Q: But what about if we want to write our own implementation:
-    - A: It's possible to set how to create the job identifier:
-      ```go
-      locker, err := gormlock.NewGormLocker(db, "local",
-          gormlock.WithJobIdentifier(
-              func(ctx context.Context, key string) string {
-                  return ...
-              },
-          ),
-      )
-      ```
+- The table `cron_job_locks` needs to exist in the database. One possible option is to use [`db.Automigrate(&gormlock.CronJobLock{})`](https://gorm.io/docs/migration.html)
+- In order to uniquely identify the job, the locker uses the unique combination of `job name + timestamp` (by default with precision to seconds). Check [JobIdentifier](#jobidentifier) for more info.
+
+## 💡 Features
+
+### JobIdentifier
+
+Gorm Lock tries to lock the access to a job by uniquely identify the job. The default implementation to uniquely identify the job is using the following combination [`job name and timestamp`](./gorm_lock_options.go).
+
+#### JobIdentifier Timestamp Precision
+
+By default, the timestamp precision is in **seconds**, meaning that if a job named `myJob` is executed at `2025-01-01 10:11:12 15:16:17.000`, the resulting job identifier will be the combination of `myJob` and `2025-01-01 10:11:12`.
+
++ It is possible to change the precision with [`WithDefaultJobIdentifier(newPrecision)`](./gorm_lock_options.go), e.g. `WithDefaultJobIdentifier(time.Hour)`
++ It is also possible to completely override the way the job identifier is created with the [`WithJobIdentifier()`](./gorm_lock_options.go) option.
+
+To see these two options in action, check the test [TestJobReturningExceptionWhenUnique](./gorm_lock_test.go)
+
+### Removing Old Entries
+
+Gorm Lock also removes old entries stored in `gormlock.CronJobLock`. You can configure the time interval, and the time to live with the following options:
+
+- `WithTTL`
+- `WithCleanInterval`

examples/go.mod

@@ -0,0 +1,23 @@
+module examples
+
+go 1.22
+
+replace github.com/go-co-op/gocron-gorm-lock/v2 => ../
+
+require (
+	github.com/go-co-op/gocron-gorm-lock/v2 v2.0.0-00010101000000-000000000000
+	github.com/go-co-op/gocron/v2 v2.15.0
+	gorm.io/driver/sqlite v1.5.7
+	gorm.io/gorm v1.25.12
+)
+
+require (
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/jonboulle/clockwork v0.4.0 // indirect
+	github.com/mattn/go-sqlite3 v1.14.22 // indirect
+	github.com/robfig/cron/v3 v3.0.1 // indirect
+	golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8 // indirect
+	golang.org/x/text v0.21.0 // indirect
+)

examples/go.sum

@@ -0,0 +1,138 @@
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examples/simple/main.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"fmt"
+	gormlock "github.com/go-co-op/gocron-gorm-lock/v2"
+	"github.com/go-co-op/gocron/v2"
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+	"time"
+)
+
+func jobFunc() {
+	fmt.Println("job func")
+}
+
+func main() {
+	db, err := gorm.Open(sqlite.Open("file::memory:?cache=shared"), &gorm.Config{})
+	if err != nil {
+		panic(err)
+	}
+	worker := "example"
+	err = db.AutoMigrate(&gormlock.CronJobLock{}) // We need the table to store the job execution
+	if err != nil {
+		panic(err)
+	}
+
+	locker, err := gormlock.NewGormLocker(db, worker)
+	if err != nil {
+		panic(err)
+	}
+
+	s, err := gocron.NewScheduler(gocron.WithDistributedLocker(locker))
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = s.NewJob(gocron.DurationJob(1*time.Second), gocron.NewTask(jobFunc), gocron.WithName("unique_name"))
+	if err != nil {
+		panic(err)
+	}
+	_, err = s.NewJob(gocron.DurationJob(1*time.Second), gocron.NewTask(jobFunc), gocron.WithName("unique_name"))
+	if err != nil {
+		panic(err)
+	}
+
+	s.Start()
+	time.Sleep(4 * time.Second)
+}