Add initial memo to scheduler workflows

service/frontend/workflow_handler.go

@@ -2982,6 +2982,8 @@ func (wh *WorkflowHandler) CreateSchedule(ctx context.Context, request *workflow
 	if err != nil {
 		return nil, err
 	}
+	// Add initial memo for list schedules
+	wh.addInitialScheduleMemo(request, input)
 	// Add namespace division
 	searchattribute.AddSearchAttribute(&request.SearchAttributes, searchattribute.TemporalNamespaceDivision, payload.EncodeString(scheduler.NamespaceDivision))
 	// Create StartWorkflowExecutionRequest
@@ -4837,6 +4839,28 @@ func (wh *WorkflowHandler) cleanScheduleMemo(memo *commonpb.Memo) *commonpb.Memo
 	return memo
 }
 
+// This mutates request (but idempotent so safe for retries)
+func (wh *WorkflowHandler) addInitialScheduleMemo(request *workflowservice.CreateScheduleRequest, args *schedspb.StartScheduleArgs) {
+	info := scheduler.GetListInfoFromStartArgs(args)
+	infoBytes, err := info.Marshal()
+	if err != nil {
+		wh.logger.Error("encoding initial schedule memo failed", tag.Error(err))
+		return
+	}
+	p, err := sdk.PreferProtoDataConverter.ToPayload(infoBytes)
+	if err != nil {
+		wh.logger.Error("encoding initial schedule memo failed", tag.Error(err))
+		return
+	}
+	if request.Memo == nil {
+		request.Memo = &commonpb.Memo{}
+	}
+	if request.Memo.Fields == nil {
+		request.Memo.Fields = make(map[string]*commonpb.Payload)
+	}
+	request.Memo.Fields[scheduler.MemoFieldInfo] = p
+}
+
 func getBatchOperationState(workflowState enumspb.WorkflowExecutionStatus) enumspb.BatchOperationState {
 	var operationState enumspb.BatchOperationState
 	switch workflowState {

service/worker/scheduler/workflow.go

@@ -252,7 +252,9 @@ func (s *scheduler) ensureFields() {
 func (s *scheduler) compileSpec() {
 	cspec, err := NewCompiledSpec(s.Schedule.Spec)
 	if err != nil {
-		s.logger.Error("Invalid schedule", "error", err)
+		if s.logger != nil {
+			s.logger.Error("Invalid schedule", "error", err)
+		}
 		s.Info.InvalidScheduleError = err.Error()
 		s.cspec = nil
 	} else {
@@ -516,6 +518,8 @@ func (s *scheduler) processSignals() bool {
 }
 
 func (s *scheduler) getFutureActionTimes(n int) []*time.Time {
+	// Note that `s` may be a fake scheduler used to compute list info at creation time.
+
 	if s.cspec == nil {
 		return nil
 	}
@@ -571,6 +575,9 @@ func (s *scheduler) incSeqNo() {
 }
 
 func (s *scheduler) getListInfo() *schedpb.ScheduleListInfo {
+	// Note that `s` may be a fake scheduler used to compute list info at creation time, before
+	// the first workflow task. This function and anything it calls should not use s.ctx.
+
 	// make shallow copy
 	spec := *s.Schedule.Spec
 	// clear fields that are too large/not useful for the list view
@@ -676,6 +683,7 @@ func (s *scheduler) addStart(nominalTime, actualTime time.Time, overlapPolicy en
 }
 
 // processBuffer should return true if there might be more work to do right now.
+//
 //nolint:revive
 func (s *scheduler) processBuffer() bool {
 	s.logger.Debug("processBuffer", "buffer", len(s.State.BufferedStarts), "running", len(s.Info.RunningWorkflows), "needRefresh", s.State.NeedRefresh)
@@ -941,3 +949,14 @@ func panicIfErr(err error) {
 		panic(err)
 	}
 }
+
+func GetListInfoFromStartArgs(args *schedspb.StartScheduleArgs) *schedpb.ScheduleListInfo {
+	// note that this does not take into account InitialPatch
+	fakeScheduler := &scheduler{
+		StartScheduleArgs: *args,
+		tweakables:        currentTweakablePolicies,
+	}
+	fakeScheduler.ensureFields()
+	fakeScheduler.compileSpec()
+	return fakeScheduler.getListInfo()
+}

tests/schedule_test.go

@@ -46,6 +46,7 @@ import (
 	"go.temporal.io/sdk/worker"
 	"go.temporal.io/sdk/workflow"
 
+	"go.temporal.io/server/common/dynamicconfig"
 	"go.temporal.io/server/common/log/tag"
 	"go.temporal.io/server/common/payload"
 	"go.temporal.io/server/common/persistence/sql/sqlplugin/sqlite"
@@ -259,7 +260,7 @@ func (s *scheduleIntegrationSuite) TestBasics() {
 			Namespace:       s.namespace,
 			MaximumPageSize: 5,
 		})
-		if err != nil || len(listResp.Schedules) != 1 || len(listResp.Schedules[0].GetInfo().GetRecentActions()) < 2 {
+		if err != nil || len(listResp.Schedules) != 1 || listResp.Schedules[0].ScheduleId != sid || len(listResp.Schedules[0].GetInfo().GetRecentActions()) < 2 {
 			return false
 		}
 		s.NoError(err)
@@ -466,6 +467,14 @@ func (s *scheduleIntegrationSuite) TestInput() {
 	_, err = s.engine.CreateSchedule(NewContext(), req)
 	s.NoError(err)
 	s.Eventually(func() bool { return atomic.LoadInt32(&runs) == 1 }, 5*time.Second, 200*time.Millisecond)
+
+	// cleanup
+	_, err = s.engine.DeleteSchedule(NewContext(), &workflowservice.DeleteScheduleRequest{
+		Namespace:  s.namespace,
+		ScheduleId: sid,
+		Identity:   "test",
+	})
+	s.NoError(err)
 }
 
 func (s *scheduleIntegrationSuite) TestRefresh() {
@@ -546,4 +555,82 @@ func (s *scheduleIntegrationSuite) TestRefresh() {
 	// scheduler has done some stuff
 	events3 := s.getHistory(s.namespace, &commonpb.WorkflowExecution{WorkflowId: scheduler.WorkflowIDPrefix + sid})
 	s.Greater(len(events3), len(events2))
+
+	// cleanup
+	_, err = s.engine.DeleteSchedule(NewContext(), &workflowservice.DeleteScheduleRequest{
+		Namespace:  s.namespace,
+		ScheduleId: sid,
+		Identity:   "test",
+	})
+	s.NoError(err)
+}
+
+func (s *scheduleIntegrationSuite) TestListBeforeRun() {
+	sid := "sched-test-list-before-run"
+	wid := "sched-test-list-before-run-wf"
+	wt := "sched-test-list-before-run-wt"
+
+	// disable per-ns worker so that the schedule workflow never runs
+	dc := s.testCluster.host.dcClient
+	dc.OverrideValue(dynamicconfig.WorkerPerNamespaceWorkerCount, 0)
+	s.testCluster.host.workerService.RefreshPerNSWorkerManager()
+	time.Sleep(2 * time.Second)
+
+	schedule := &schedulepb.Schedule{
+		Spec: &schedulepb.ScheduleSpec{
+			Interval: []*schedulepb.IntervalSpec{
+				{Interval: timestamp.DurationPtr(3 * time.Second)},
+			},
+		},
+		Action: &schedulepb.ScheduleAction{
+			Action: &schedulepb.ScheduleAction_StartWorkflow{
+				StartWorkflow: &workflowpb.NewWorkflowExecutionInfo{
+					WorkflowId:   wid,
+					WorkflowType: &commonpb.WorkflowType{Name: wt},
+					TaskQueue:    &taskqueuepb.TaskQueue{Name: s.taskQueue},
+				},
+			},
+		},
+	}
+	req := &workflowservice.CreateScheduleRequest{
+		Namespace:  s.namespace,
+		ScheduleId: sid,
+		Schedule:   schedule,
+		Identity:   "test",
+		RequestId:  uuid.New(),
+	}
+
+	_, err := s.engine.CreateSchedule(NewContext(), req)
+	s.NoError(err)
+
+	s.Eventually(func() bool { // wait for visibility
+		listResp, err := s.engine.ListSchedules(NewContext(), &workflowservice.ListSchedulesRequest{
+			Namespace:       s.namespace,
+			MaximumPageSize: 5,
+		})
+		if err != nil || len(listResp.Schedules) != 1 || listResp.Schedules[0].ScheduleId != sid {
+			return false
+		}
+		s.NoError(err)
+		entry := listResp.Schedules[0]
+		s.Equal(sid, entry.ScheduleId)
+		s.NotNil(entry.Info)
+		s.Equal(schedule.Spec, entry.Info.Spec)
+		s.Equal(wt, entry.Info.WorkflowType.Name)
+		s.False(entry.Info.Paused)
+		s.Greater(len(entry.Info.FutureActionTimes), 1)
+		return true
+	}, 10*time.Second, 1*time.Second)
+
+	// cleanup
+	_, err = s.engine.DeleteSchedule(NewContext(), &workflowservice.DeleteScheduleRequest{
+		Namespace:  s.namespace,
+		ScheduleId: sid,
+		Identity:   "test",
+	})
+	s.NoError(err)
+
+	dc.RemoveOverride(dynamicconfig.WorkerPerNamespaceWorkerCount)
+	s.testCluster.host.workerService.RefreshPerNSWorkerManager()
+	time.Sleep(2 * time.Second)
 }