add scheduler

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

cmd/servicechecker/main.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"os"
+	"os/signal"
 	"time"
 
 	grpccli "go.unistack.org/micro-client-grpc/v3"
@@ -15,6 +16,7 @@ import (
 	"go.unistack.org/micro/v3/semconv"
 	"go.unistack.org/servicechecker/pkg/config"
 	"go.unistack.org/servicechecker/pkg/grpcconn"
+	"go.unistack.org/servicechecker/pkg/scheduler"
 	"google.golang.org/protobuf/reflect/protodesc"
 	"google.golang.org/protobuf/reflect/protoreflect"
 	"google.golang.org/protobuf/types/descriptorpb"
@@ -22,7 +24,9 @@ import (
 )
 
 func main() {
-	ctx := context.Background()
+	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, os.Kill)
+	defer stop()
+
 	l := slog.NewLogger()
 	l.Init()
 	m := victoriametrics.NewMeter()
@@ -36,6 +40,15 @@ func main() {
 		l.Fatal(ctx, "failed to open config", err)
 	}
 
+	s, err := scheduler.NewScheduler()
+	if err != nil {
+		l.Fatal(ctx, "failed to create scheduler", err)
+	}
+
+	if err = s.Start(); err != nil {
+		l.Fatal(ctx, "failed to start scheduler", err)
+	}
+
 	clients := make(map[string]client.Client)
 	gcli := grpccli.NewClient(
 		client.Codec("application/json", jsonpbcodec.NewCodec()),
@@ -110,5 +123,6 @@ func main() {
 			}
 		}
 	}
-	m.Write(os.Stdout)
+
+	<-ctx.Done()
 }

go.mod

@@ -3,23 +3,27 @@ module go.unistack.org/servicechecker
 go 1.23.3
 
 require (
+	github.com/go-co-op/gocron/v2 v2.12.3
 	github.com/google/uuid v1.6.0
-	github.com/jhump/protoreflect/v2 v2.0.0-beta.2
 	go.unistack.org/micro-client-grpc/v3 v3.11.10
 	go.unistack.org/micro-codec-jsonpb/v3 v3.10.3
 	go.unistack.org/micro-codec-proto/v3 v3.10.2
 	go.unistack.org/micro-meter-victoriametrics/v3 v3.8.9
-	go.unistack.org/micro-proto/v3 v3.4.1
 	go.unistack.org/micro/v3 v3.10.100
 	google.golang.org/protobuf v1.34.2
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
-	github.com/kr/text v0.2.0 // indirect
+	github.com/jonboulle/clockwork v0.4.0 // indirect
+	github.com/kr/pretty v0.3.0 // indirect
+	github.com/robfig/cron/v3 v3.0.1 // indirect
+	github.com/rogpeppe/go-internal v1.9.0 // indirect
 	github.com/valyala/fastrand v1.1.0 // indirect
 	github.com/valyala/histogram v1.2.0 // indirect
 	go.unistack.org/metrics v0.0.1 // indirect
+	go.unistack.org/micro-proto/v3 v3.4.1 // indirect
+	golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8 // indirect
 	golang.org/x/net v0.29.0 // indirect
 	golang.org/x/sys v0.27.0 // indirect
 	golang.org/x/text v0.18.0 // indirect

go.sum

@@ -1,18 +1,26 @@
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-co-op/gocron/v2 v2.12.3 h1:3JkKjkFoAPp/i0YE+sonlF5gi+xnBChwYh75nX16MaE=
+github.com/go-co-op/gocron/v2 v2.12.3/go.mod h1:xY7bJxGazKam1cz04EebrlP4S9q4iWdiAylMGP3jY9w=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/jhump/protoreflect/v2 v2.0.0-beta.2 h1:qZU+rEZUOYTz1Bnhi3xbwn+VxdXkLVeEpAeZzVXLY88=
+github.com/jonboulle/clockwork v0.4.0 h1:p4Cf1aMWXnXAUh8lVfewRBx1zaTSYKrKMF2g3ST4RZ4=
-github.com/jhump/protoreflect/v2 v2.0.0-beta.2/go.mod h1:4tnOYkB/mq7QTyS3YKtVtNrJv4Psqout8HA1U+hZtgM=
+github.com/jonboulle/clockwork v0.4.0/go.mod h1:xgRqUGwRcjKCO1vbZUEtSLrqKoPSsUpK7fnezOII0kc=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
 github.com/kr/pretty v0.3.0/go.mod h1:640gp4NfQd8pI5XOwp5fnNeVWj67G7CFk/SaSQn7NBk=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/robfig/cron/v3 v3.0.1 h1:WdRxkvbJztn8LMz/QEvLN5sBU+xKpSqwwUO1Pjr4qDs=
+github.com/robfig/cron/v3 v3.0.1/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
+github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
 github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
@@ -21,6 +29,8 @@ github.com/valyala/fastrand v1.1.0 h1:f+5HkLW4rsgzdNoleUOB69hyT9IlD2ZQh9GyDMfb5G
 github.com/valyala/fastrand v1.1.0/go.mod h1:HWqCzkrkg6QXT8V2EXWvXCoow7vLwOFN002oeRzjapQ=
 github.com/valyala/histogram v1.2.0 h1:wyYGAZZt3CpwUiIb9AU/Zbllg1llXyrtApRS815OLoQ=
 github.com/valyala/histogram v1.2.0/go.mod h1:Hb4kBwb4UxsaNbbbh+RRz8ZR6pdodR57tzWUS3BUzXY=
+go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
+go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
 go.unistack.org/metrics v0.0.1 h1:sCnGO059ZccGC/D34iRH121eSk+7ci5+OY9cl5K7GKY=
 go.unistack.org/metrics v0.0.1/go.mod h1:1FY4R7EKJa9Oz2D6wlGScNerpl6igRs9Cx/3et4Rgs4=
 go.unistack.org/micro-client-grpc/v3 v3.11.10 h1:hbqCL4JLbTtPN1ee16EK6LqTbeIr6HynJJjCRWAu2kk=
@@ -35,6 +45,8 @@ go.unistack.org/micro-proto/v3 v3.4.1 h1:UTjLSRz2YZuaHk9iSlVqqsA50JQNAEK2ZFboGqt
 go.unistack.org/micro-proto/v3 v3.4.1/go.mod h1:okx/cnOhzuCX0ggl/vToatbCupi0O44diiiLLsZ93Zo=
 go.unistack.org/micro/v3 v3.10.100 h1:yWOaU0ImCGm5k5MUzlIobJUOr+KLfrR/BoDZvcHyKxM=
 go.unistack.org/micro/v3 v3.10.100/go.mod h1:YzMldzHN9Ei+zy5t/Psu7RUWDZwUfrNYiStSQtTz90g=
+golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8 h1:yixxcjnhBmY0nkL253HFVIm0JsFHwrHdT3Yh6szTnfY=
+golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8/go.mod h1:jj3sYF3dwk5D+ghuXyeI3r5MFf+NT2An6/9dOA95KSI=
 golang.org/x/net v0.29.0 h1:5ORfpBpCs4HzDYoodCDBbwHzdR5UrLBZ3sOnUJmFoHo=
 golang.org/x/net v0.29.0/go.mod h1:gLkgy8jTGERgjzMic6DS9+SP0ajcu6Xu3Orq/SpETg0=
 golang.org/x/sys v0.27.0 h1:wBqf8DvsY9Y/2P8gAfPDEYNuS30J4lPHJxXSb/nJZ+s=
@@ -48,7 +60,9 @@ google.golang.org/grpc v1.67.0/go.mod h1:1gLDyUQU7CTLJI90u3nXZ9ekeghjeM7pTDZlqFN
 google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
 google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pkg/config/config.go

@@ -25,6 +25,7 @@ type Check struct {
 	Name     string         `json:"name,omitempty" yaml:"name,omitempty"`
 	Data     string         `json:"data,omitempty" yaml:"data,omitempty"`
 	Timeout  mtime.Duration `json:"timeout,omitempty" yaml:"timeout,omitempty"`
+	Interval mtime.Duration `json:"interval,omitempty" yaml:"interval,omitempty"`
 }
 
 func (cfg *Config) Parse(r io.Reader) error {

pkg/scheduler/scheduler.go

@@ -0,0 +1,93 @@
+package scheduler
+
+import (
+	"time"
+
+	cron "github.com/go-co-op/gocron/v2"
+)
+
+type Task func()
+
+type Scheduler interface {
+	Start() error
+	Stop() error
+	Jobs() []Job
+	NewJob(td time.Duration, fn any, args ...any) (Job, error)
+}
+
+type Job interface {
+	ID() string
+	LastRun() (time.Time, error)
+	Name() string
+	NextRun() (time.Time, error)
+	NextRuns(int) ([]time.Time, error)
+}
+
+type Options struct{}
+
+type Option func(*Options) error
+
+type scheduler struct {
+	scheduler cron.Scheduler
+}
+
+func NewScheduler(opts ...Option) (Scheduler, error) {
+	s, err := cron.NewScheduler()
+	if err != nil {
+		return nil, err
+	}
+	return &scheduler{scheduler: s}, nil
+}
+
+func (s *scheduler) Start() error {
+	s.scheduler.Start()
+	return nil
+}
+
+func (s *scheduler) Stop() error {
+	if err := s.scheduler.Shutdown(); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (s *scheduler) NewJob(td time.Duration, fn any, args ...any) (Job, error) {
+	j, err := s.scheduler.NewJob(cron.DurationJob(td), cron.NewTask(fn, args...))
+	if err != nil {
+		return nil, err
+	}
+	return &job{job: j}, nil
+}
+
+func (s *scheduler) Jobs() []Job {
+	jobs := s.scheduler.Jobs()
+	ret := make([]Job, len(jobs))
+	for idx := range jobs {
+		ret[idx] = &job{job: jobs[idx]}
+	}
+	return ret
+}
+
+type job struct {
+	job cron.Job
+}
+
+func (j *job) ID() string {
+	return j.job.ID().String()
+}
+
+func (j *job) LastRun() (time.Time, error) {
+	return j.job.LastRun()
+}
+
+func (j *job) Name() string {
+	return j.job.Name()
+}
+
+func (j *job) NextRun() (time.Time, error) {
+	return j.job.NextRun()
+}
+
+func (j *job) NextRuns(n int) ([]time.Time, error) {
+	return j.job.NextRuns(n)
+}