From 4af71493f2190f214b50c1ce1d2dd5adbf12b5eb Mon Sep 17 00:00:00 2001 From: Manuel Doncel Martos Date: Tue, 14 Nov 2023 06:55:11 +0100 Subject: [PATCH] adding basic gocron-gorm-lock functionality. (#1) --- README.md | 66 +++++++++++++++ go.mod | 56 +++++++++++++ go.sum | 196 ++++++++++++++++++++++++++++++++++++++++++++ gormlock.go | 62 ++++++++++++++ gormlock_test.go | 200 +++++++++++++++++++++++++++++++++++++++++++++ gormlockoptions.go | 13 +++ job-lock-struct.go | 28 +++++++ 7 files changed, 621 insertions(+) create mode 100644 go.sum create mode 100644 gormlock.go create mode 100644 gormlock_test.go create mode 100644 gormlockoptions.go create mode 100644 job-lock-struct.go diff --git a/README.md b/README.md index f35b4c6..da54ab9 100644 --- a/README.md +++ b/README.md @@ -1,2 +1,68 @@ # gocron-gorm-lock A gocron locker implementation using gorm + +## install + +``` +go get github.com/go-co-op/gocron-gorm-lock +``` + +## usage + +Here is an example usage that would be deployed in multiple instances + +```go +package main + +import ( + "fmt" + + "github.com/go-co-op/gocron" + gormlock "github.com/go-co-op/gocron-gorm-lock" + "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 + locker, err := gormlock.NewGormLocker(db, worker) + if err != nil { + // handle the error + } + + s := gocron.NewScheduler(time.UTC) + s.WithDistributedLocker(locker) + + _, err = s.Every("1s").Name("unique_name").Do(func() { + // task to do + fmt.Println("call 1s") + }) + if err != nil { + // handle the error + } + + s.StartBlocking() +} +``` + +## 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 set how to create the job identifier, here is an example to set an hour precision: + ```go + locker, err := gormlock.NewGormLocker(db, "local", + gormlock.WithJobIdentifier( + func(ctx context.Context, key string) string { + return time.Now().Truncate(60 * time.Minute). + Format("2006-01-02 15:04:05.000") + }, + ), + ) + ``` \ No newline at end of file diff --git a/go.mod b/go.mod index c312b53..efdd7f6 100644 --- a/go.mod +++ b/go.mod @@ -1,3 +1,59 @@ module github.com/go-co-op/gocron-gorm-lock go 1.20 + +require ( + github.com/go-co-op/gocron v1.31.0 + github.com/stretchr/testify v1.8.4 + github.com/testcontainers/testcontainers-go v0.22.0 + github.com/testcontainers/testcontainers-go/modules/postgres v0.22.0 + gorm.io/driver/postgres v1.5.2 + gorm.io/gorm v1.25.2 +) + +require ( + dario.cat/mergo v1.0.0 // indirect + github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 // indirect + github.com/Microsoft/go-winio v0.6.1 // indirect + github.com/cenkalti/backoff/v4 v4.2.0 // indirect + github.com/containerd/containerd v1.7.3 // indirect + github.com/cpuguy83/dockercfg v0.3.1 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/docker/distribution v2.8.2+incompatible // indirect + github.com/docker/docker v24.0.5+incompatible // indirect + github.com/docker/go-connections v0.4.0 // indirect + github.com/docker/go-units v0.5.0 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/protobuf v1.5.3 // indirect + github.com/google/uuid v1.3.0 // indirect + github.com/jackc/pgpassfile v1.0.0 // indirect + github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a // indirect + github.com/jackc/pgx/v5 v5.3.1 // indirect + github.com/jinzhu/inflection v1.0.0 // indirect + github.com/jinzhu/now v1.1.5 // indirect + github.com/klauspost/compress v1.16.0 // indirect + github.com/magiconair/properties v1.8.7 // indirect + github.com/moby/patternmatcher v0.5.0 // indirect + github.com/moby/sys/sequential v0.5.0 // indirect + github.com/moby/term v0.5.0 // indirect + github.com/morikuni/aec v1.0.0 // indirect + github.com/opencontainers/go-digest v1.0.0 // indirect + github.com/opencontainers/image-spec v1.1.0-rc4 // indirect + github.com/opencontainers/runc v1.1.5 // indirect + github.com/pkg/errors v0.9.1 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/robfig/cron/v3 v3.0.1 // indirect + github.com/sirupsen/logrus v1.9.0 // indirect + go.uber.org/atomic v1.9.0 // indirect + golang.org/x/crypto v0.8.0 // indirect + golang.org/x/exp v0.0.0-20230510235704-dd950f8aeaea // indirect + golang.org/x/mod v0.9.0 // indirect + golang.org/x/net v0.9.0 // indirect + golang.org/x/sys v0.8.0 // indirect + golang.org/x/text v0.9.0 // indirect + golang.org/x/tools v0.7.0 // indirect + google.golang.org/genproto/googleapis/rpc v0.0.0-20230525234030-28d5490b6b19 // indirect + google.golang.org/grpc v1.57.0 // indirect + google.golang.org/protobuf v1.30.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..a409eb9 --- /dev/null +++ b/go.sum @@ -0,0 +1,196 @@ +dario.cat/mergo v1.0.0 h1:AGCNq9Evsj31mOgNPcLyXc+4PNABt905YmuqPYYpBWk= +dario.cat/mergo v1.0.0/go.mod h1:uNxQE+84aUszobStD9th8a29P2fMDhsBdgRYvZOxGmk= +github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOElx5B5HZ4hJQsoJ/PvUvKRhJHDQXO8P8= +github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/Microsoft/go-winio v0.6.1 h1:9/kr64B9VUZrLm5YYwbGtUJnMgqWVOdUAXu6Migciow= +github.com/Microsoft/go-winio v0.6.1/go.mod h1:LRdKpFKfdobln8UmuiYcKPot9D2v6svN5+sAH+4kjUM= +github.com/cenkalti/backoff/v4 v4.2.0 h1:HN5dHm3WBOgndBH6E8V0q2jIYIR3s9yglV8k/+MN3u4= +github.com/cenkalti/backoff/v4 v4.2.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE= +github.com/checkpoint-restore/go-criu/v5 v5.3.0/go.mod h1:E/eQpaFtUKGOOSEBZgmKAcn+zUUwWxqcaKZlF54wK8E= +github.com/cilium/ebpf v0.7.0/go.mod h1:/oI2+1shJiTGAMgl6/RgJr36Eo1jzrRcAWbcXO2usCA= +github.com/containerd/console v1.0.3/go.mod h1:7LqA/THxQ86k76b8c/EMSiaJ3h1eZkMkXar0TQ1gf3U= +github.com/containerd/containerd v1.7.3 h1:cKwYKkP1eTj54bP3wCdXXBymmKRQMrWjkLSWZZJDa8o= +github.com/containerd/containerd v1.7.3/go.mod h1:32FOM4/O0RkNg7AjQj3hDzN9cUGtu+HMvaKUNiqCZB8= +github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc= 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+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +gorm.io/driver/postgres v1.5.2 h1:ytTDxxEv+MplXOfFe3Lzm7SjG09fcdb3Z/c056DTBx0= +gorm.io/driver/postgres v1.5.2/go.mod h1:fmpX0m2I1PKuR7mKZiEluwrP3hbs+ps7JIGMUBpCgl8= +gorm.io/gorm v1.25.2 h1:gs1o6Vsa+oVKG/a9ElL3XgyGfghFfkKA2SInQaCyMho= +gorm.io/gorm v1.25.2/go.mod h1:L4uxeKpfBml98NYqVqwAdmV1a2nBtAec/cf3fpucW/k= diff --git a/gormlock.go b/gormlock.go new file mode 100644 index 0000000..cc4f724 --- /dev/null +++ b/gormlock.go @@ -0,0 +1,62 @@ +package gormlock + +import ( + "context" + "time" + + "github.com/go-co-op/gocron" + "gorm.io/gorm" +) + +var defaultPrecision = time.Second + +func NewGormLocker(db *gorm.DB, worker string, options ...LockOption) (gocron.Locker, error) { + gl := &gormLocker{db: db, worker: worker} + for _, option := range options { + option(gl) + } + return gl, nil +} + +var _ gocron.Locker = (*gormLocker)(nil) + +type gormLocker struct { + db *gorm.DB + worker string + jobIdentifier func(ctx context.Context, key string) string +} + +func (g *gormLocker) Lock(ctx context.Context, key string) (gocron.Lock, error) { + ji := g.getJobIdentifier(ctx, key) + + // I would like that people can "pass" their own implementation, + cjb := &CronJobLock{ + JobName: key, + JobIdentifier: ji, + Worker: g.worker, + Status: "RUNNING", + } + tx := g.db.Create(cjb) + if tx.Error != nil { + return nil, tx.Error + } + return &gormLock{db: g.db, id: cjb.GetID()}, nil +} + +func (g *gormLocker) getJobIdentifier(ctx context.Context, key string) string { + if g.jobIdentifier == nil { + return time.Now().Truncate(defaultPrecision).Format("2006-01-02 15:04:05.000") + } + return g.jobIdentifier(ctx, key) +} + +var _ gocron.Lock = (*gormLock)(nil) + +type gormLock struct { + db *gorm.DB + id int +} + +func (g *gormLock) Unlock(_ context.Context) error { + return g.db.Model(&CronJobLock{ID: g.id}).Updates(&CronJobLock{Status: "FINISHED"}).Error +} diff --git a/gormlock_test.go b/gormlock_test.go new file mode 100644 index 0000000..467a451 --- /dev/null +++ b/gormlock_test.go @@ -0,0 +1,200 @@ +package gormlock + +import ( + "context" + "testing" + "time" + + "github.com/go-co-op/gocron" + "github.com/stretchr/testify/assert" + "github.com/stretchr/testify/require" + "github.com/testcontainers/testcontainers-go" + testcontainerspostgres "github.com/testcontainers/testcontainers-go/modules/postgres" + "github.com/testcontainers/testcontainers-go/wait" + "gorm.io/driver/postgres" + "gorm.io/gorm" +) + +func TestEnableDistributedLocking(t *testing.T) { + ctx := context.Background() + postgresContainer, err := testcontainerspostgres.RunContainer(ctx, + testcontainers.WithWaitStrategy(wait.ForLog("database system is ready to accept connections"). + WithOccurrence(2).WithStartupTimeout(5*time.Second))) + require.NoError(t, err) + t.Cleanup(func() { + if err := postgresContainer.Terminate(ctx); err != nil { + t.Fatalf("failed to terminate container: %s", err) + } + }) + + connStr, err := postgresContainer.ConnectionString(ctx, "sslmode=disable", "application_name=test") + assert.NoError(t, err) + + db, err := gorm.Open(postgres.Open(connStr), &gorm.Config{}) + require.NoError(t, err) + + err = db.AutoMigrate(&CronJobLock{}) + require.NoError(t, err) + + resultChan := make(chan int, 10) + f := func(schedulerInstance int) { + resultChan <- schedulerInstance + println(time.Now().Truncate(defaultPrecision).Format("2006-01-02 15:04:05.000")) + } + + l1, err := NewGormLocker(db, "s1") + require.NoError(t, err) + s1 := gocron.NewScheduler(time.UTC) + s1.WithDistributedLocker(l1) + _, err = s1.Every("1s").Do(f, 1) + require.NoError(t, err) + + l2, err := NewGormLocker(db, "s2") + require.NoError(t, err) + s2 := gocron.NewScheduler(time.UTC) + s2.WithDistributedLocker(l2) + _, err = s2.Every("1s").Do(f, 2) + require.NoError(t, err) + + s1.StartAsync() + s2.StartAsync() + + time.Sleep(3500 * time.Millisecond) + + s1.Stop() + s2.Stop() + close(resultChan) + + var results []int + for r := range resultChan { + results = append(results, r) + } + assert.Len(t, results, 4) + var allCronJobs []*CronJobLock + db.Find(&allCronJobs) + assert.Equal(t, len(results), len(allCronJobs)) +} + +func TestEnableDistributedLocking_DifferentJob(t *testing.T) { + ctx := context.Background() + postgresContainer, err := testcontainerspostgres.RunContainer(ctx, + testcontainers.WithWaitStrategy(wait.ForLog("database system is ready to accept connections"). + WithOccurrence(2).WithStartupTimeout(5*time.Second))) + require.NoError(t, err) + t.Cleanup(func() { + if err := postgresContainer.Terminate(ctx); err != nil { + t.Fatalf("failed to terminate container: %s", err) + } + }) + + connStr, err := postgresContainer.ConnectionString(ctx, "sslmode=disable", "application_name=test") + assert.NoError(t, err) + + db, err := gorm.Open(postgres.Open(connStr), &gorm.Config{}) + require.NoError(t, err) + + err = db.AutoMigrate(&CronJobLock{}) + require.NoError(t, err) + + resultChan := make(chan int, 10) + f := func(schedulerInstance int) { + resultChan <- schedulerInstance + } + + result2Chan := make(chan int, 10) + f2 := func(schedulerInstance int) { + result2Chan <- schedulerInstance + } + + s1 := gocron.NewScheduler(time.UTC) + l1, err := NewGormLocker(db, "s1") + require.NoError(t, err) + s1.WithDistributedLocker(l1) + _, err = s1.Every("1s").Name("f").Do(f, 1) + require.NoError(t, err) + _, err = s1.Every("1s").Name("f2").Do(f2, 1) + require.NoError(t, err) + + s2 := gocron.NewScheduler(time.UTC) + l2, err := NewGormLocker(db, "s2") + require.NoError(t, err) + s2.WithDistributedLocker(l2) + _, err = s2.Every("1s").Name("f").Do(f, 2) + require.NoError(t, err) + _, err = s2.Every("1s").Name("f2").Do(f2, 2) + require.NoError(t, err) + + s3 := gocron.NewScheduler(time.UTC) + l3, err := NewGormLocker(db, "s3") + require.NoError(t, err) + s3.WithDistributedLocker(l3) + _, err = s3.Every("1s").Name("f").Do(f, 3) + require.NoError(t, err) + _, err = s3.Every("1s").Name("f2").Do(f2, 3) + require.NoError(t, err) + + s1.StartAsync() + s2.StartAsync() + s3.StartAsync() + + time.Sleep(3500 * time.Millisecond) + + s1.Stop() + s2.Stop() + s3.Stop() + close(resultChan) + close(result2Chan) + + var results []int + for r := range resultChan { + results = append(results, r) + } + assert.Len(t, results, 4, "f is expected 4 times") + var results2 []int + for r := range result2Chan { + results2 = append(results2, r) + } + assert.Len(t, results2, 4, "f2 is expected 4 times") + var allCronJobs []*CronJobLock + db.Find(&allCronJobs) + assert.Equal(t, len(results)+len(results2), len(allCronJobs)) +} + +func TestJobReturningExceptionWhenUnique(t *testing.T) { + ctx := context.Background() + postgresContainer, err := testcontainerspostgres.RunContainer(ctx, + testcontainers.WithWaitStrategy(wait.ForLog("database system is ready to accept connections"). + WithOccurrence(2).WithStartupTimeout(5*time.Second))) + require.NoError(t, err) + t.Cleanup(func() { + if err := postgresContainer.Terminate(ctx); err != nil { + t.Fatalf("failed to terminate container: %s", err) + } + }) + + connStr, err := postgresContainer.ConnectionString(ctx, "sslmode=disable", "application_name=test") + assert.NoError(t, err) + + db, err := gorm.Open(postgres.Open(connStr), &gorm.Config{}) + require.NoError(t, err) + + err = db.AutoMigrate(&CronJobLock{}) + require.NoError(t, err) + + // creating a entry to force the unique identifier error + cjb := &CronJobLock{ + JobName: "job", + JobIdentifier: time.Now().Truncate(60 * time.Minute).Format("2006-01-02 15:04:05.000"), + Worker: "local", + Status: "RUNNING", + } + require.NoError(t, db.Create(cjb).Error) + + l, _ := NewGormLocker(db, "local", WithJobIdentifier(func(ctx context.Context, key string) string { + return time.Now().Truncate(60 * time.Minute).Format("2006-01-02 15:04:05.000") + })) + _, lerr := l.Lock(ctx, "job") + if assert.Error(t, lerr) { + assert.ErrorContains(t, lerr, "violates unique constraint") + } +} diff --git a/gormlockoptions.go b/gormlockoptions.go new file mode 100644 index 0000000..ca46c11 --- /dev/null +++ b/gormlockoptions.go @@ -0,0 +1,13 @@ +package gormlock + +import ( + "context" +) + +type LockOption func(*gormLocker) + +func WithJobIdentifier(f func(ctx context.Context, key string) string) LockOption { + return func(l *gormLocker) { + l.jobIdentifier = f + } +} diff --git a/job-lock-struct.go b/job-lock-struct.go new file mode 100644 index 0000000..36c5bec --- /dev/null +++ b/job-lock-struct.go @@ -0,0 +1,28 @@ +package gormlock + +import "time" + +type JobLock[T any] interface { + GetID() T + SetJobIdentifier(ji string) +} + +var _ JobLock[int] = (*CronJobLock)(nil) + +type CronJobLock struct { + ID int + CreatedAt time.Time + UpdatedAt time.Time + JobName string `gorm:"index:idx_name,unique"` + JobIdentifier string `gorm:"index:idx_name,unique"` + Worker string `gorm:"not null;default:null"` + Status string `gorm:"not nullldefault:null"` +} + +func (cjb *CronJobLock) SetJobIdentifier(ji string) { + cjb.JobIdentifier = ji +} + +func (cjb *CronJobLock) GetID() int { + return cjb.ID +}