agscheduler

AGScheduler

Advanced Golang Scheduler (AGScheduler) is a task scheduling library for Golang that supports multiple scheduling types, dynamically changing and persistent jobs, remote call, and cluster

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Features

• Supports three scheduling types
  • One-off execution
  • Interval execution
  • Cron-style scheduling
• Supports multiple job store methods
  • Memory
  • GORM(any RDBMS supported by GORM works)
  • Redis
  • MongoDB
  • etcd
  • Elasticsearch
• Supports remote call
  • gRPC
  • HTTP
• Supports cluster
  • Remote worker nodes
  • Scheduler high availability (Experimental)

Framework

Usage

package main

import (
	"context"
	"fmt"
	"log/slog"
	"time"

	"github.com/kwkwc/agscheduler"
	"github.com/kwkwc/agscheduler/stores"
)

func printMsg(ctx context.Context, j agscheduler.Job) {
	slog.Info(fmt.Sprintf("Run job `%s` %s\n\n", j.FullName(), j.Args))
}

func main() {
	agscheduler.RegisterFuncs(
		agscheduler.FuncPkg{Func: printMsg},
	)

	store := &stores.MemoryStore{}
	scheduler := &agscheduler.Scheduler{}
	scheduler.SetStore(store)

	job1 := agscheduler.Job{
		Name:     "Job1",
		Type:     agscheduler.TYPE_INTERVAL,
		Interval: "2s",
		Timezone: "UTC",
		Func:     printMsg,
		Args:     map[string]any{"arg1": "1", "arg2": "2", "arg3": "3"},
	}
	job1, _ = scheduler.AddJob(job1)
	slog.Info(fmt.Sprintf("%s.\n\n", job1))

	job2 := agscheduler.Job{
		Name:     "Job2",
		Type:     agscheduler.TYPE_CRON,
		CronExpr: "*/1 * * * *",
		Timezone: "Asia/Shanghai",
		FuncName: "main.printMsg",
		Args:     map[string]any{"arg4": "4", "arg5": "5", "arg6": "6", "arg7": "7"},
	}
	job2, _ = s.AddJob(job2)
	slog.Info(fmt.Sprintf("%s.\n\n", job2))

	job3 := agscheduler.Job{
		Name:     "Job3",
		Type:     agscheduler.TYPE_DATETIME,
		StartAt:  "2023-09-22 07:30:08",
		Timezone: "America/New_York",
		Func:     printMsg,
		Args:     map[string]any{"arg8": "8", "arg9": "9"},
	}
	job3, _ = s.AddJob(job3)
	slog.Info(fmt.Sprintf("%s.\n\n", job3))

	jobs, _ := s.GetAllJobs()
	slog.Info(fmt.Sprintf("Scheduler get all jobs %s.\n\n", jobs))

	scheduler.Start()

	select {}
}

Register Funcs

Since golang can't serialize functions, you need to register them with RegisterFuncs before scheduler.Start()

gRPC

// Server
grservice := services.GRPCService{
	Scheduler: scheduler,
	Address:   "127.0.0.1:36360",
}
grservice.Start()

// Client
conn, _ := grpc.Dial("127.0.0.1:36360", grpc.WithTransportCredentials(insecure.NewCredentials()))
client := pb.NewSchedulerClient(conn)
client.AddJob(ctx, job)

HTTP

// Server
hservice := services.HTTPService{
	Scheduler: scheduler,
	Address:   "127.0.0.1:36370",
}
hservice.Start()

// Client
mJob := map[string]any{...}
bJob, _ := json.Marshal(mJob)
resp, _ := http.Post("http://127.0.0.1:36370/scheduler/job", "application/json", bytes.NewReader(bJob))

Cluster

// Main Node
cnMain := &agscheduler.ClusterNode{
	Endpoint:     "127.0.0.1:36380",
	EndpointGRPC: "127.0.0.1:36360",
	EndpointHTTP: "127.0.0.1:36370",
	Queue:        "default",
}
schedulerMain.SetStore(storeMain)
schedulerMain.SetClusterNode(ctx, cnMain)
cserviceMain := &services.ClusterService{Cn: cnMain}
cserviceMain.Start()

// Worker Node
cnNode := &agscheduler.ClusterNode{
	EndpointMain: "127.0.0.1:36380",
	Endpoint:     "127.0.0.1:36381",
	EndpointGRPC: "127.0.0.1:36361",
	EndpointHTTP: "127.0.0.1:36371",
	Queue:        "worker",
}
schedulerNode.SetStore(storeNode)
schedulerNode.SetClusterNode(ctx, cnNode)
cserviceNode := &services.ClusterService{Cn: cnNode}
cserviceNode.Start()

Cluster HA (High Availability, Experimental)

// HA requires the following conditions to be met:
//
// 1. The number of HA nodes in the cluster must be odd
// 2. All HA nodes need to connect to the same Store (excluding `MemoryStore`)
// 3. The `Mode` of the `ClusterNode` needs to be set to `HA`
// 4. The main HA node must be started first

// Main HA Node
cnMain := &agscheduler.ClusterNode{..., Mode: "HA"}

// HA Node
cnNode1 := &agscheduler.ClusterNode{..., Mode: "HA"}
cnNode2 := &agscheduler.ClusterNode{..., Mode: "HA"}

// Worker Node
cnNode3 := &agscheduler.ClusterNode{...}

Base API

Scheduler API

Cluster API

Examples

Complete example

Development

# Clone code
git clone git@github.com:kwkwc/agscheduler.git

# Working directory
cd agscheduler

# Install dependencies
make install

# Up CI services
make up-ci-services

# Run check
make check-all

Thanks

APScheduler

simple-raft