feat: workflow run dispatcher

internal/repository/workflow_run.go

@@ -69,6 +69,13 @@ func (r *WorkflowRunRepository) Save(ctx context.Context, workflowRun *domain.Wo
 		workflowRecord, err := txApp.FindRecordById(domain.CollectionNameWorkflow, workflowRun.WorkflowId)
 		if err != nil {
 			return err
+		} else if workflowRun.Id == workflowRecord.GetString("lastRunId") {
+			workflowRecord.IgnoreUnchangedFields(true)
+			workflowRecord.Set("lastRunStatus", record.GetString("status"))
+			err = txApp.Save(workflowRecord)
+			if err != nil {
+				return err
+			}
 		} else if workflowRecord.GetDateTime("lastRunTime").Time().IsZero() || workflowRun.StartedAt.After(workflowRecord.GetDateTime("lastRunTime").Time()) {
 			workflowRecord.IgnoreUnchangedFields(true)
 			workflowRecord.Set("lastRunId", record.Id)

internal/rest/handlers/workflow.go

@@ -13,7 +13,7 @@ import (
 type workflowService interface {
 	StartRun(ctx context.Context, req *dtos.WorkflowStartRunReq) error
 	CancelRun(ctx context.Context, req *dtos.WorkflowCancelRunReq) error
-	Stop(ctx context.Context)
+	Shutdown(ctx context.Context)
 }
 
 type WorkflowHandler struct {

internal/rest/routes/routes.go

@@ -46,6 +46,6 @@ func Register(router *router.Router[*core.RequestEvent]) {
 
 func Unregister() {
 	if workflowSvc != nil {
-		workflowSvc.Stop(context.Background())
+		workflowSvc.Shutdown(context.Background())
 	}
 }

internal/workflow/dispatcher/dispatcher.go

@@ -0,0 +1,274 @@
+package dispatcher
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"strconv"
+	"sync"
+	"time"
+
+	"github.com/usual2970/certimate/internal/app"
+	"github.com/usual2970/certimate/internal/domain"
+	"github.com/usual2970/certimate/internal/pkg/utils/slices"
+)
+
+var maxWorkers = 16
+
+func init() {
+	envMaxWorkers := os.Getenv("CERTIMATE_WORKFLOW_MAX_WORKERS")
+	if n, err := strconv.Atoi(envMaxWorkers); err != nil && n > 0 {
+		maxWorkers = n
+	}
+}
+
+type workflowWorker struct {
+	Data   *WorkflowWorkerData
+	Cancel context.CancelFunc
+}
+
+type WorkflowWorkerData struct {
+	WorkflowId      string
+	WorkflowContent *domain.WorkflowNode
+	RunId           string
+}
+
+type WorkflowDispatcher struct {
+	semaphore chan struct{}
+
+	queue      []*WorkflowWorkerData
+	queueMutex sync.Mutex
+
+	workers     map[string]*workflowWorker // key: WorkflowId
+	workerIdMap map[string]string          // key: RunId, value: WorkflowId
+	workerMutex sync.Mutex
+
+	chWork  chan *WorkflowWorkerData
+	chCandi chan struct{}
+
+	wg sync.WaitGroup
+
+	workflowRepo    workflowRepository
+	workflowRunRepo workflowRunRepository
+}
+
+func newWorkflowDispatcher(workflowRepo workflowRepository, workflowRunRepo workflowRunRepository) *WorkflowDispatcher {
+	dispatcher := &WorkflowDispatcher{
+		semaphore: make(chan struct{}, maxWorkers),
+
+		queue:      make([]*WorkflowWorkerData, 0),
+		queueMutex: sync.Mutex{},
+
+		workers:     make(map[string]*workflowWorker),
+		workerIdMap: make(map[string]string),
+		workerMutex: sync.Mutex{},
+
+		chWork:  make(chan *WorkflowWorkerData),
+		chCandi: make(chan struct{}, 1),
+
+		workflowRepo:    workflowRepo,
+		workflowRunRepo: workflowRunRepo,
+	}
+
+	go func() {
+		for {
+			select {
+			case <-dispatcher.chWork:
+				dispatcher.dequeueWorker()
+
+			case <-dispatcher.chCandi:
+				dispatcher.dequeueWorker()
+			}
+		}
+	}()
+
+	return dispatcher
+}
+
+func (w *WorkflowDispatcher) Dispatch(data *WorkflowWorkerData) {
+	if data == nil {
+		panic("worker data is nil")
+	}
+
+	w.enqueueWorker(data)
+	select {
+	case w.chWork <- data:
+	default:
+	}
+}
+
+func (w *WorkflowDispatcher) Cancel(runId string) {
+	hasWorker := false
+
+	// 取消正在执行的 WorkflowRun
+	w.workerMutex.Lock()
+	if workflowId, ok := w.workerIdMap[runId]; ok {
+		if worker, ok := w.workers[workflowId]; ok {
+			hasWorker = true
+			worker.Cancel()
+			delete(w.workers, workflowId)
+			delete(w.workerIdMap, runId)
+		}
+	}
+	w.workerMutex.Unlock()
+
+	// 移除排队中的 WorkflowRun
+	w.queueMutex.Lock()
+	w.queue = slices.Filter(w.queue, func(d *WorkflowWorkerData) bool {
+		return d.RunId != runId
+	})
+	w.queueMutex.Unlock()
+
+	// 已挂起，查询 WorkflowRun 并更新其状态为 Canceled
+	if !hasWorker {
+		if run, err := w.workflowRunRepo.GetById(context.Background(), runId); err == nil {
+			if run.Status == domain.WorkflowRunStatusTypePending || run.Status == domain.WorkflowRunStatusTypeRunning {
+				run.Status = domain.WorkflowRunStatusTypeCanceled
+				w.workflowRunRepo.Save(context.Background(), run)
+			}
+		}
+	}
+}
+
+func (w *WorkflowDispatcher) Shutdown() {
+	// 清空排队中的 WorkflowRun
+	w.queueMutex.Lock()
+	w.queue = make([]*WorkflowWorkerData, 0)
+	w.queueMutex.Unlock()
+
+	// 等待所有正在执行的 WorkflowRun 完成
+	w.wg.Wait()
+	w.workers = make(map[string]*workflowWorker)
+	w.workerIdMap = make(map[string]string)
+}
+
+func (w *WorkflowDispatcher) enqueueWorker(data *WorkflowWorkerData) {
+	w.queueMutex.Lock()
+	defer w.queueMutex.Unlock()
+	w.queue = append(w.queue, data)
+}
+
+func (w *WorkflowDispatcher) dequeueWorker() {
+	for {
+		select {
+		case w.semaphore <- struct{}{}:
+		default:
+			// 达到最大并发数
+			return
+		}
+
+		w.queueMutex.Lock()
+		if len(w.queue) == 0 {
+			w.queueMutex.Unlock()
+			<-w.semaphore
+			return
+		}
+
+		data := w.queue[0]
+		w.queue = w.queue[1:]
+		w.queueMutex.Unlock()
+
+		// 检查是否有相同 WorkflowId 的 WorkflowRun 正在执行
+		// 如果有，则重新排队，以保证同一个工作流同一时间内只有一个正在执行
+		// 即不同 WorkflowId 的任务并行化，相同 WorkflowId 的任务串行化
+		w.workerMutex.Lock()
+		if _, exists := w.workers[data.WorkflowId]; exists {
+			w.queueMutex.Lock()
+			w.queue = append(w.queue, data)
+			w.queueMutex.Unlock()
+			w.workerMutex.Unlock()
+
+			<-w.semaphore
+
+			continue
+		}
+
+		ctx, cancel := context.WithCancel(context.Background())
+		w.workers[data.WorkflowId] = &workflowWorker{data, cancel}
+		w.workerIdMap[data.RunId] = data.WorkflowId
+		w.workerMutex.Unlock()
+
+		w.wg.Add(1)
+		go w.work(ctx, data)
+	}
+}
+
+func (w *WorkflowDispatcher) work(ctx context.Context, data *WorkflowWorkerData) {
+	defer func() {
+		<-w.semaphore
+		w.workerMutex.Lock()
+		delete(w.workers, data.WorkflowId)
+		delete(w.workerIdMap, data.RunId)
+		w.workerMutex.Unlock()
+
+		w.wg.Done()
+
+		// 尝试取出排队中的其他 WorkflowRun 继续执行
+		select {
+		case w.chCandi <- struct{}{}:
+		default:
+		}
+	}()
+
+	// 查询 WorkflowRun
+	run, err := w.workflowRunRepo.GetById(ctx, data.RunId)
+	if err != nil {
+		if !(errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded)) {
+			app.GetLogger().Error(fmt.Sprintf("failed to get workflow run #%s", data.RunId), "err", err)
+		}
+		return
+	} else if run.Status != domain.WorkflowRunStatusTypePending {
+		return
+	} else if ctx.Err() != nil {
+		run.Status = domain.WorkflowRunStatusTypeCanceled
+		w.workflowRunRepo.Save(ctx, run)
+		return
+	}
+
+	// 更新 WorkflowRun 状态为 Running
+	run.Status = domain.WorkflowRunStatusTypeRunning
+	if _, err := w.workflowRunRepo.Save(ctx, run); err != nil {
+		if !(errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded)) {
+			panic(err)
+		}
+		return
+	}
+
+	// 执行工作流
+	invoker := newWorkflowInvoker(data)
+	if runErr := invoker.Invoke(ctx); runErr != nil {
+		if errors.Is(runErr, context.Canceled) {
+			run.Status = domain.WorkflowRunStatusTypeCanceled
+			run.Logs = invoker.GetLogs()
+		} else {
+			run.Status = domain.WorkflowRunStatusTypeFailed
+			run.EndedAt = time.Now()
+			run.Logs = invoker.GetLogs()
+			run.Error = runErr.Error()
+		}
+
+		if _, err := w.workflowRunRepo.Save(ctx, run); err != nil {
+			if !(errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded)) {
+				panic(err)
+			}
+		}
+
+		return
+	}
+
+	// 更新 WorkflowRun 状态为 Succeeded/Failed
+	run.EndedAt = time.Now()
+	run.Logs = invoker.GetLogs()
+	run.Error = domain.WorkflowRunLogs(invoker.GetLogs()).ErrorString()
+	if run.Error == "" {
+		run.Status = domain.WorkflowRunStatusTypeSucceeded
+	} else {
+		run.Status = domain.WorkflowRunStatusTypeFailed
+	}
+	if _, err := w.workflowRunRepo.Save(ctx, run); err != nil {
+		if !(errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded)) {
+			panic(err)
+		}
+	}
+}

internal/workflow/dispatcher/invoker.go

@@ -0,0 +1,104 @@
+package dispatcher
+
+import (
+	"context"
+	"errors"
+
+	"github.com/usual2970/certimate/internal/domain"
+	nodes "github.com/usual2970/certimate/internal/workflow/node-processor"
+)
+
+type workflowInvoker struct {
+	workflowId      string
+	workflowContent *domain.WorkflowNode
+	runId           string
+	runLogs         []domain.WorkflowRunLog
+}
+
+func newWorkflowInvoker(data *WorkflowWorkerData) *workflowInvoker {
+	if data == nil {
+		panic("worker data is nil")
+	}
+
+	return &workflowInvoker{
+		workflowId:      data.WorkflowId,
+		workflowContent: data.WorkflowContent,
+		runId:           data.RunId,
+		runLogs:         make([]domain.WorkflowRunLog, 0),
+	}
+}
+
+func (w *workflowInvoker) Invoke(ctx context.Context) error {
+	ctx = context.WithValue(ctx, "workflow_id", w.workflowId)
+	ctx = context.WithValue(ctx, "workflow_run_id", w.runId)
+	return w.processNode(ctx, w.workflowContent)
+}
+
+func (w *workflowInvoker) GetLogs() []domain.WorkflowRunLog {
+	return w.runLogs
+}
+
+func (w *workflowInvoker) processNode(ctx context.Context, node *domain.WorkflowNode) error {
+	current := node
+	for current != nil {
+		if ctx.Err() != nil {
+			return ctx.Err()
+		}
+
+		if current.Type == domain.WorkflowNodeTypeBranch || current.Type == domain.WorkflowNodeTypeExecuteResultBranch {
+			for _, branch := range current.Branches {
+				if err := w.processNode(ctx, &branch); err != nil {
+					// 并行分支的某一分支发生错误时，忽略此错误，继续执行其他分支
+					if !(errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded)) {
+						continue
+					}
+					return err
+				}
+			}
+		}
+
+		var processor nodes.NodeProcessor
+		var procErr error
+		for {
+			if current.Type != domain.WorkflowNodeTypeBranch && current.Type != domain.WorkflowNodeTypeExecuteResultBranch {
+				processor, procErr = nodes.GetProcessor(current)
+				if procErr != nil {
+					break
+				}
+
+				procErr = processor.Process(ctx)
+				log := processor.GetLog(ctx)
+				if log != nil {
+					w.runLogs = append(w.runLogs, *log)
+				}
+				if procErr != nil {
+					break
+				}
+			}
+
+			break
+		}
+
+		// TODO: 优化可读性
+		if procErr != nil && current.Next != nil && current.Next.Type != domain.WorkflowNodeTypeExecuteResultBranch {
+			return procErr
+		} else if procErr != nil && current.Next != nil && current.Next.Type == domain.WorkflowNodeTypeExecuteResultBranch {
+			current = w.getBranchByType(current.Next.Branches, domain.WorkflowNodeTypeExecuteFailure)
+		} else if procErr == nil && current.Next != nil && current.Next.Type == domain.WorkflowNodeTypeExecuteResultBranch {
+			current = w.getBranchByType(current.Next.Branches, domain.WorkflowNodeTypeExecuteSuccess)
+		} else {
+			current = current.Next
+		}
+	}
+
+	return nil
+}
+
+func (w *workflowInvoker) getBranchByType(branches []domain.WorkflowNode, nodeType domain.WorkflowNodeType) *domain.WorkflowNode {
+	for _, branch := range branches {
+		if branch.Type == nodeType {
+			return &branch
+		}
+	}
+	return nil
+}

internal/workflow/dispatcher/singleton.go

@@ -0,0 +1,31 @@
+package dispatcher
+
+import (
+	"context"
+	"sync"
+
+	"github.com/usual2970/certimate/internal/domain"
+)
+
+type workflowRepository interface {
+	GetById(ctx context.Context, id string) (*domain.Workflow, error)
+	Save(ctx context.Context, workflow *domain.Workflow) (*domain.Workflow, error)
+}
+
+type workflowRunRepository interface {
+	GetById(ctx context.Context, id string) (*domain.WorkflowRun, error)
+	Save(ctx context.Context, workflowRun *domain.WorkflowRun) (*domain.WorkflowRun, error)
+}
+
+var (
+	instance    *WorkflowDispatcher
+	intanceOnce sync.Once
+)
+
+func GetSingletonDispatcher(workflowRepo workflowRepository, workflowRunRepo workflowRunRepository) *WorkflowDispatcher {
+	intanceOnce.Do(func() {
+		instance = newWorkflowDispatcher(workflowRepo, workflowRunRepo)
+	})
+
+	return instance
+}

internal/workflow/node-processor/apply_node.go

@@ -80,7 +80,6 @@ func (n *applyNode) Process(ctx context.Context) error {
 	certificate.PopulateFromX509(certX509)
 
 	// 保存执行结果
-	// TODO: 先保持一个节点始终只有一个输出，后续增加版本控制
 	output := &domain.WorkflowOutput{
 		WorkflowId: getContextWorkflowId(ctx),
 		RunId:      getContextWorkflowRunId(ctx),
@@ -124,7 +123,7 @@ func (n *applyNode) checkCanSkip(ctx context.Context, lastOutput *domain.Workflo
 			renewalInterval := time.Duration(currentNodeConfig.SkipBeforeExpiryDays) * time.Hour * 24
 			expirationTime := time.Until(lastCertificate.ExpireAt)
 			if expirationTime > renewalInterval {
-				return true, fmt.Sprintf("已申请过证书，且证书尚未临近过期（到期尚余 %d 天，预计不足 %d 天时续期）", int(expirationTime.Hours()/24), currentNodeConfig.SkipBeforeExpiryDays)
+				return true, fmt.Sprintf("已申请过证书，且证书尚未临近过期（尚余 %d 天过期，不足 %d 天时续期）", int(expirationTime.Hours()/24), currentNodeConfig.SkipBeforeExpiryDays)
 			}
 		}
 	}

internal/workflow/processor/processor.go

@@ -1,90 +0,0 @@
-package processor
-
-import (
-	"context"
-
-	"github.com/usual2970/certimate/internal/domain"
-	nodes "github.com/usual2970/certimate/internal/workflow/node-processor"
-)
-
-type workflowProcessor struct {
-	workflowId      string
-	workflowContent *domain.WorkflowNode
-	runId           string
-	runLogs         []domain.WorkflowRunLog
-}
-
-func NewWorkflowProcessor(workflowId string, workflowContent *domain.WorkflowNode, workflowRunId string) *workflowProcessor {
-	return &workflowProcessor{
-		workflowId:      workflowId,
-		workflowContent: workflowContent,
-		runId:           workflowRunId,
-		runLogs:         make([]domain.WorkflowRunLog, 0),
-	}
-}
-
-func (w *workflowProcessor) Process(ctx context.Context) error {
-	ctx = context.WithValue(ctx, "workflow_id", w.workflowId)
-	ctx = context.WithValue(ctx, "workflow_run_id", w.runId)
-	return w.processNode(ctx, w.workflowContent)
-}
-
-func (w *workflowProcessor) GetLogs() []domain.WorkflowRunLog {
-	return w.runLogs
-}
-
-func (w *workflowProcessor) processNode(ctx context.Context, node *domain.WorkflowNode) error {
-	current := node
-	for current != nil {
-		if current.Type == domain.WorkflowNodeTypeBranch || current.Type == domain.WorkflowNodeTypeExecuteResultBranch {
-			for _, branch := range current.Branches {
-				if err := w.processNode(ctx, &branch); err != nil {
-					continue
-				}
-			}
-		}
-
-		var processor nodes.NodeProcessor
-		var runErr error
-		for {
-			if current.Type != domain.WorkflowNodeTypeBranch && current.Type != domain.WorkflowNodeTypeExecuteResultBranch {
-				processor, runErr = nodes.GetProcessor(current)
-				if runErr != nil {
-					break
-				}
-
-				runErr = processor.Process(ctx)
-				log := processor.GetLog(ctx)
-				if log != nil {
-					w.runLogs = append(w.runLogs, *log)
-				}
-				if runErr != nil {
-					break
-				}
-			}
-
-			break
-		}
-
-		if runErr != nil && current.Next != nil && current.Next.Type != domain.WorkflowNodeTypeExecuteResultBranch {
-			return runErr
-		} else if runErr != nil && current.Next != nil && current.Next.Type == domain.WorkflowNodeTypeExecuteResultBranch {
-			current = w.getBranchByType(current.Next.Branches, domain.WorkflowNodeTypeExecuteFailure)
-		} else if runErr == nil && current.Next != nil && current.Next.Type == domain.WorkflowNodeTypeExecuteResultBranch {
-			current = w.getBranchByType(current.Next.Branches, domain.WorkflowNodeTypeExecuteSuccess)
-		} else {
-			current = current.Next
-		}
-	}
-
-	return nil
-}
-
-func (w *workflowProcessor) getBranchByType(branches []domain.WorkflowNode, nodeType domain.WorkflowNodeType) *domain.WorkflowNode {
-	for _, branch := range branches {
-		if branch.Type == nodeType {
-			return &branch
-		}
-	}
-	return nil
-}

internal/workflow/service.go

@@ -4,23 +4,14 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"sync"
 	"time"
 
 	"github.com/usual2970/certimate/internal/app"
 	"github.com/usual2970/certimate/internal/domain"
 	"github.com/usual2970/certimate/internal/domain/dtos"
-	processor "github.com/usual2970/certimate/internal/workflow/processor"
+	"github.com/usual2970/certimate/internal/workflow/dispatcher"
 )
 
-const defaultRoutines = 16
-
-type workflowRunData struct {
-	WorkflowId      string
-	WorkflowContent *domain.WorkflowNode
-	RunTrigger      domain.WorkflowTriggerType
-}
-
 type workflowRepository interface {
 	ListEnabledAuto(ctx context.Context) ([]*domain.Workflow, error)
 	GetById(ctx context.Context, id string) (*domain.Workflow, error)
@@ -33,30 +24,19 @@ type workflowRunRepository interface {
 }
 
 type WorkflowService struct {
-	ch     chan *workflowRunData
+	dispatcher *dispatcher.WorkflowDispatcher
-	wg     sync.WaitGroup
-	cancel context.CancelFunc
 
 	workflowRepo    workflowRepository
 	workflowRunRepo workflowRunRepository
 }
 
 func NewWorkflowService(workflowRepo workflowRepository, workflowRunRepo workflowRunRepository) *WorkflowService {
-	ctx, cancel := context.WithCancel(context.Background())
-
 	srv := &WorkflowService{
-		ch:     make(chan *workflowRunData, 1),
+		dispatcher: dispatcher.GetSingletonDispatcher(workflowRepo, workflowRunRepo),
-		cancel: cancel,
 
 		workflowRepo:    workflowRepo,
 		workflowRunRepo: workflowRunRepo,
 	}
-
-	srv.wg.Add(defaultRoutines)
-	for i := 0; i < defaultRoutines; i++ {
-		go srv.startRun(ctx)
-	}
-
 	return srv
 }
 
@@ -75,7 +55,6 @@ func (s *WorkflowService) InitSchedule(ctx context.Context) error {
 			})
 		})
 		if err != nil {
-			app.GetLogger().Error("failed to add schedule", "err", err)
 			return err
 		}
 	}
@@ -86,7 +65,6 @@ func (s *WorkflowService) InitSchedule(ctx context.Context) error {
 func (s *WorkflowService) StartRun(ctx context.Context, req *dtos.WorkflowStartRunReq) error {
 	workflow, err := s.workflowRepo.GetById(ctx, req.WorkflowId)
 	if err != nil {
-		app.GetLogger().Error("failed to get workflow", "id", req.WorkflowId, "err", err)
 		return err
 	}
 
@@ -94,69 +72,10 @@ func (s *WorkflowService) StartRun(ctx context.Context, req *dtos.WorkflowStartR
 		return errors.New("workflow is already pending or running")
 	}
 
-	s.ch <- &workflowRunData{
-		WorkflowId:      workflow.Id,
-		WorkflowContent: workflow.Content,
-		RunTrigger:      req.RunTrigger,
-	}
-
-	return nil
-}
-
-func (s *WorkflowService) CancelRun(ctx context.Context, req *dtos.WorkflowCancelRunReq) error {
-	workflow, err := s.workflowRepo.GetById(ctx, req.WorkflowId)
-	if err != nil {
-		app.GetLogger().Error("failed to get workflow", "id", req.WorkflowId, "err", err)
-		return err
-	}
-
-	workflowRun, err := s.workflowRunRepo.GetById(ctx, req.RunId)
-	if err != nil {
-		app.GetLogger().Error("failed to get workflow run", "id", req.RunId, "err", err)
-		return err
-	} else if workflowRun.WorkflowId != workflow.Id {
-		return errors.New("workflow run not found")
-	} else if workflowRun.Status != domain.WorkflowRunStatusTypePending && workflowRun.Status != domain.WorkflowRunStatusTypeRunning {
-		return errors.New("workflow run is not pending or running")
-	}
-
-	// TODO: 取消运行，防止因为某些原因意外挂起（如进程被杀死）导致工作流一直处于 running 状态无法重新运行
-	// workflowRun.Status = domain.WorkflowRunStatusTypeCanceled
-	// workflowRun.EndedAt = time.Now()
-	// if _, err := s.workflowRunRepo.Save(ctx, workflowRun); err != nil {
-	// 	return err
-	// }
-
-	// return nil
-
-	return errors.New("TODO: 尚未实现")
-}
-
-func (s *WorkflowService) Stop(ctx context.Context) {
-	s.cancel()
-	s.wg.Wait()
-}
-
-func (s *WorkflowService) startRun(ctx context.Context) {
-	defer s.wg.Done()
-
-	for {
-		select {
-		case data := <-s.ch:
-			if err := s.startRunWithData(ctx, data); err != nil {
-				app.GetLogger().Error("failed to run workflow", "id", data.WorkflowId, "err", err)
-			}
-		case <-ctx.Done():
-			return
-		}
-	}
-}
-
-func (s *WorkflowService) startRunWithData(ctx context.Context, data *workflowRunData) error {
 	run := &domain.WorkflowRun{
-		WorkflowId: data.WorkflowId,
+		WorkflowId: workflow.Id,
-		Status:     domain.WorkflowRunStatusTypeRunning,
+		Status:     domain.WorkflowRunStatusTypePending,
-		Trigger:    data.RunTrigger,
+		Trigger:    req.RunTrigger,
 		StartedAt:  time.Now(),
 	}
 	if resp, err := s.workflowRunRepo.Save(ctx, run); err != nil {
@@ -165,31 +84,35 @@ func (s *WorkflowService) startRunWithData(ctx context.Context, data *workflowRu
 		run = resp
 	}
 
-	processor := processor.NewWorkflowProcessor(data.WorkflowId, data.WorkflowContent, run.Id)
+	s.dispatcher.Dispatch(&dispatcher.WorkflowWorkerData{
-	if runErr := processor.Process(ctx); runErr != nil {
+		WorkflowId:      workflow.Id,
-		run.Status = domain.WorkflowRunStatusTypeFailed
+		WorkflowContent: workflow.Content,
-		run.EndedAt = time.Now()
+		RunId:           run.Id,
-		run.Logs = processor.GetLogs()
+	})
-		run.Error = runErr.Error()
-		if _, err := s.workflowRunRepo.Save(ctx, run); err != nil {
-			app.GetLogger().Error("failed to save workflow run", "err", err)
-		}
-
-		return fmt.Errorf("failed to run workflow: %w", runErr)
-	}
-
-	run.EndedAt = time.Now()
-	run.Logs = processor.GetLogs()
-	run.Error = domain.WorkflowRunLogs(run.Logs).ErrorString()
-	if run.Error == "" {
-		run.Status = domain.WorkflowRunStatusTypeSucceeded
-	} else {
-		run.Status = domain.WorkflowRunStatusTypeFailed
-	}
-	if _, err := s.workflowRunRepo.Save(ctx, run); err != nil {
-		app.GetLogger().Error("failed to save workflow run", "err", err)
-		return err
-	}
 
 	return nil
 }
+
+func (s *WorkflowService) CancelRun(ctx context.Context, req *dtos.WorkflowCancelRunReq) error {
+	workflow, err := s.workflowRepo.GetById(ctx, req.WorkflowId)
+	if err != nil {
+		return err
+	}
+
+	workflowRun, err := s.workflowRunRepo.GetById(ctx, req.RunId)
+	if err != nil {
+		return err
+	} else if workflowRun.WorkflowId != workflow.Id {
+		return errors.New("workflow run not found")
+	} else if workflowRun.Status != domain.WorkflowRunStatusTypePending && workflowRun.Status != domain.WorkflowRunStatusTypeRunning {
+		return errors.New("workflow run is not pending or running")
+	}
+
+	s.dispatcher.Cancel(workflowRun.Id)
+
+	return nil
+}
+
+func (s *WorkflowService) Shutdown(ctx context.Context) {
+	s.dispatcher.Shutdown()
+}

ui/src/components/workflow/WorkflowRuns.tsx

@@ -5,9 +5,9 @@ import {
   ClockCircleOutlined as ClockCircleOutlinedIcon,
   CloseCircleOutlined as CloseCircleOutlinedIcon,
   DeleteOutlined as DeleteOutlinedIcon,
-  PauseCircleOutlined as PauseCircleOutlinedIcon,
   PauseOutlined as PauseOutlinedIcon,
   SelectOutlined as SelectOutlinedIcon,
+  StopOutlined as StopOutlinedIcon,
   SyncOutlined as SyncOutlinedIcon,
 } from "@ant-design/icons";
 import { useRequest } from "ahooks";
@@ -75,7 +75,7 @@ const WorkflowRuns = ({ className, style, workflowId }: WorkflowRunsProps) => {
           );
         } else if (record.status === WORKFLOW_RUN_STATUSES.CANCELED) {
           return (
-            <Tag icon={<PauseCircleOutlinedIcon />} color="warning">
+            <Tag icon={<StopOutlinedIcon />} color="warning">
               {t("workflow_run.props.status.canceled")}
             </Tag>
           );

ui/src/pages/dashboard/Dashboard.tsx

@@ -7,10 +7,10 @@ import {
   ClockCircleOutlined as ClockCircleOutlinedIcon,
   CloseCircleOutlined as CloseCircleOutlinedIcon,
   LockOutlined as LockOutlinedIcon,
-  PauseCircleOutlined as PauseCircleOutlinedIcon,
   PlusOutlined as PlusOutlinedIcon,
   SelectOutlined as SelectOutlinedIcon,
   SendOutlined as SendOutlinedIcon,
+  StopOutlined as StopOutlinedIcon,
   SyncOutlined as SyncOutlinedIcon,
 } from "@ant-design/icons";
 import { PageHeader } from "@ant-design/pro-components";
@@ -89,7 +89,6 @@ const Dashboard = () => {
         const workflow = record.expand?.workflowId;
         return (
           <Typography.Link
-            type="secondary"
             ellipsis
             onClick={() => {
               if (workflow) {
@@ -129,7 +128,7 @@ const Dashboard = () => {
           );
         } else if (record.status === WORKFLOW_RUN_STATUSES.CANCELED) {
           return (
-            <Tag icon={<PauseCircleOutlinedIcon />} color="warning">
+            <Tag icon={<StopOutlinedIcon />} color="warning">
               {t("workflow_run.props.status.canceled")}
             </Tag>
           );

ui/src/pages/workflows/WorkflowDetail.tsx

@@ -42,7 +42,6 @@ const WorkflowDetail = () => {
     useZustandShallowSelector(["workflow", "initialized", "init", "destroy", "setEnabled", "release", "discard"])
   );
   useEffect(() => {
-    // TODO: loading & error
     workflowState.init(workflowId!);
 
     return () => {
@@ -52,7 +51,7 @@ const WorkflowDetail = () => {
 
   const [tabValue, setTabValue] = useState<"orchestration" | "runs">("orchestration");
 
-  const [isRunning, setIsRunning] = useState(false);
+  const [isPendingOrRunning, setIsPendingOrRunning] = useState(false);
   const lastRunStatus = useMemo(() => workflow.lastRunStatus, [workflow]);
 
   const [allowDiscard, setAllowDiscard] = useState(false);
@@ -60,14 +59,14 @@ const WorkflowDetail = () => {
   const [allowRun, setAllowRun] = useState(false);
 
   useEffect(() => {
-    setIsRunning(lastRunStatus == WORKFLOW_RUN_STATUSES.PENDING || lastRunStatus == WORKFLOW_RUN_STATUSES.RUNNING);
+    setIsPendingOrRunning(lastRunStatus == WORKFLOW_RUN_STATUSES.PENDING || lastRunStatus == WORKFLOW_RUN_STATUSES.RUNNING);
   }, [lastRunStatus]);
 
   useEffect(() => {
-    if (!!workflowId && isRunning) {
+    if (!!workflowId && isPendingOrRunning) {
       subscribeWorkflow(workflowId, (e) => {
         if (e.record.lastRunStatus !== WORKFLOW_RUN_STATUSES.PENDING && e.record.lastRunStatus !== WORKFLOW_RUN_STATUSES.RUNNING) {
-          setIsRunning(false);
+          setIsPendingOrRunning(false);
           unsubscribeWorkflow(workflowId);
         }
       });
@@ -76,15 +75,15 @@ const WorkflowDetail = () => {
         unsubscribeWorkflow(workflowId);
       };
     }
-  }, [workflowId, isRunning]);
+  }, [workflowId, isPendingOrRunning]);
 
   useEffect(() => {
     const hasReleased = !!workflow.content;
     const hasChanges = workflow.hasDraft! || !isEqual(workflow.draft, workflow.content);
-    setAllowDiscard(!isRunning && hasReleased && hasChanges);
+    setAllowDiscard(!isPendingOrRunning && hasReleased && hasChanges);
-    setAllowRelease(!isRunning && hasChanges);
+    setAllowRelease(!isPendingOrRunning && hasChanges);
     setAllowRun(hasReleased);
-  }, [workflow.content, workflow.draft, workflow.hasDraft, isRunning]);
+  }, [workflow.content, workflow.draft, workflow.hasDraft, isPendingOrRunning]);
 
   const handleEnableChange = async () => {
     if (!workflow.enabled && (!workflow.content || !isAllNodesValidated(workflow.content))) {
@@ -174,12 +173,12 @@ const WorkflowDetail = () => {
       let unsubscribeFn: Awaited<ReturnType<typeof subscribeWorkflow>> | undefined = undefined;
 
       try {
-        setIsRunning(true);
+        setIsPendingOrRunning(true);
 
         // subscribe before running workflow
         unsubscribeFn = await subscribeWorkflow(workflowId!, (e) => {
           if (e.record.lastRunStatus !== WORKFLOW_RUN_STATUSES.PENDING && e.record.lastRunStatus !== WORKFLOW_RUN_STATUSES.RUNNING) {
-            setIsRunning(false);
+            setIsPendingOrRunning(false);
             unsubscribeFn?.();
           }
         });
@@ -188,7 +187,7 @@ const WorkflowDetail = () => {
 
         messageApi.info(t("workflow.detail.orchestration.action.run.prompt"));
       } catch (err) {
-        setIsRunning(false);
+        setIsPendingOrRunning(false);
         unsubscribeFn?.();
 
         console.error(err);
@@ -279,7 +278,7 @@ const WorkflowDetail = () => {
               </div>
               <div className="flex justify-end">
                 <Space>
-                  <Button disabled={!allowRun} icon={<CaretRightOutlinedIcon />} loading={isRunning} type="primary" onClick={handleRunClick}>
+                  <Button disabled={!allowRun} icon={<CaretRightOutlinedIcon />} loading={isPendingOrRunning} type="primary" onClick={handleRunClick}>
                     {t("workflow.detail.orchestration.action.run")}
                   </Button>
 

ui/src/pages/workflows/WorkflowList.tsx

@@ -7,8 +7,8 @@ import {
   CloseCircleOutlined as CloseCircleOutlinedIcon,
   DeleteOutlined as DeleteOutlinedIcon,
   EditOutlined as EditOutlinedIcon,
-  PauseCircleOutlined as PauseCircleOutlinedIcon,
   PlusOutlined as PlusOutlinedIcon,
+  StopOutlined as StopOutlinedIcon,
   SyncOutlined as SyncOutlinedIcon,
 } from "@ant-design/icons";
 
@@ -170,7 +170,7 @@ const WorkflowList = () => {
         } else if (record.lastRunStatus === WORKFLOW_RUN_STATUSES.FAILED) {
           icon = <CloseCircleOutlinedIcon style={{ color: themeToken.colorError }} />;
         } else if (record.lastRunStatus === WORKFLOW_RUN_STATUSES.CANCELED) {
-          icon = <PauseCircleOutlinedIcon style={{ color: themeToken.colorWarning }} />;
+          icon = <StopOutlinedIcon style={{ color: themeToken.colorWarning }} />;
         }
 
         return (