Messages protocol implementation

common/util.go

@@ -35,10 +35,8 @@ import (
 
 	"github.com/dgryski/go-farm"
 	"github.com/gogo/protobuf/proto"
-	commandpb "go.temporal.io/api/command/v1"
 	commonpb "go.temporal.io/api/common/v1"
 	enumspb "go.temporal.io/api/enums/v1"
-	historypb "go.temporal.io/api/history/v1"
 	"go.temporal.io/api/serviceerror"
 	"go.temporal.io/api/workflowservice/v1"
 
@@ -388,31 +386,16 @@ func WorkflowIDToHistoryShard(
 	return int32(hash%uint32(numberOfShards)) + 1 // ShardID starts with 1
 }
 
-// PrettyPrintHistory prints history in human-readable format
-func PrettyPrintHistory(history *historypb.History, header ...string) {
+func PrettyPrint[T proto.Message](msgs []T, header ...string) {
 	var sb strings.Builder
-	sb.WriteString("==========================================================================\n")
+	_, _ = sb.WriteString("==========================================================================\n")
 	for _, h := range header {
-		sb.WriteString(h)
-		sb.WriteString("\n")
+		_, _ = sb.WriteString(h)
+		_, _ = sb.WriteString("\n")
 	}
-	sb.WriteString("--------------------------------------------------------------------------\n")
-	_ = proto.MarshalText(&sb, history)
-	sb.WriteString("\n")
-	fmt.Print(sb.String())
-}
-
-// PrettyPrintCommands prints commands in human-readable format
-func PrettyPrintCommands(commands []*commandpb.Command, header ...string) {
-	var sb strings.Builder
-	sb.WriteString("==========================================================================\n")
-	for _, h := range header {
-		sb.WriteString(h)
-		sb.WriteString("\n")
-	}
-	sb.WriteString("--------------------------------------------------------------------------\n")
-	for _, command := range commands {
-		_ = proto.MarshalText(&sb, command)
+	_, _ = sb.WriteString("--------------------------------------------------------------------------\n")
+	for _, m := range msgs {
+		_ = proto.MarshalText(&sb, m)
 	}
 	fmt.Print(sb.String())
 }
@@ -465,6 +448,7 @@ func CreateMatchingPollWorkflowTaskQueueResponse(historyResponse *historyservice
 		ScheduledTime:              historyResponse.ScheduledTime,
 		StartedTime:                historyResponse.StartedTime,
 		Queries:                    historyResponse.Queries,
+		Messages:                   historyResponse.Messages,
 	}
 
 	return matchingResp

proto/internal/temporal/server/api/historyservice/v1/request_response.proto

@@ -34,6 +34,7 @@ import "temporal/api/taskqueue/v1/message.proto";
 import "temporal/api/enums/v1/workflow.proto";
 import "temporal/api/workflow/v1/message.proto";
 import "temporal/api/query/v1/message.proto";
+import "temporal/api/protocol/v1/message.proto";
 import "temporal/api/failure/v1/message.proto";
 
 import "temporal/server/api/clock/v1/message.proto";
@@ -164,6 +165,7 @@ message RecordWorkflowTaskStartedResponse {
     google.protobuf.Timestamp started_time = 13 [(gogoproto.stdtime) = true];
     map<string, temporal.api.query.v1.WorkflowQuery> queries = 14;
     temporal.server.api.clock.v1.VectorClock clock = 15;
+    repeated temporal.api.protocol.v1.Message messages = 16;
 }
 
 message RecordActivityTaskStartedRequest {

proto/internal/temporal/server/api/matchingservice/v1/request_response.proto

@@ -32,6 +32,7 @@ import "temporal/api/common/v1/message.proto";
 import "temporal/api/enums/v1/task_queue.proto";
 import "temporal/api/taskqueue/v1/message.proto";
 import "temporal/api/query/v1/message.proto";
+import "temporal/api/protocol/v1/message.proto";
 
 import "temporal/server/api/clock/v1/message.proto";
 import "temporal/server/api/enums/v1/task.proto";
@@ -65,6 +66,7 @@ message PollWorkflowTaskQueueResponse {
     google.protobuf.Timestamp scheduled_time = 15 [(gogoproto.stdtime) = true];
     google.protobuf.Timestamp started_time = 16 [(gogoproto.stdtime) = true];
     map<string, temporal.api.query.v1.WorkflowQuery> queries = 17;
+    repeated temporal.api.protocol.v1.Message messages = 18;
 }
 
 message PollActivityTaskQueueRequest {

service/frontend/workflow_handler.go

@@ -4433,6 +4433,7 @@ func (wh *WorkflowHandler) createPollWorkflowTaskQueueResponse(
 		ScheduledTime:              matchingResp.ScheduledTime,
 		StartedTime:                matchingResp.StartedTime,
 		Queries:                    matchingResp.Queries,
+		Messages:                   matchingResp.Messages,
 	}
 
 	return resp, nil

service/history/commandChecker.go

@@ -33,6 +33,7 @@ import (
 	commandpb "go.temporal.io/api/command/v1"
 	commonpb "go.temporal.io/api/common/v1"
 	enumspb "go.temporal.io/api/enums/v1"
+	protocolpb "go.temporal.io/api/protocol/v1"
 	"go.temporal.io/api/serviceerror"
 	taskqueuepb "go.temporal.io/api/taskqueue/v1"
 
@@ -898,3 +899,11 @@ func (v *commandAttrValidator) commandTypes(
 	}
 	return result
 }
+
+// TODO (alex-update): move to messageValidator.
+func (v *commandAttrValidator) validateMessages(
+	_ []*protocolpb.Message,
+) error {
+
+	return nil
+}

service/history/workflowTaskHandler.go

@@ -34,6 +34,7 @@ import (
 	commonpb "go.temporal.io/api/common/v1"
 	enumspb "go.temporal.io/api/enums/v1"
 	failurepb "go.temporal.io/api/failure/v1"
+	protocolpb "go.temporal.io/api/protocol/v1"
 	"go.temporal.io/api/serviceerror"
 	"go.temporal.io/api/workflowservice/v1"
 
@@ -239,6 +240,31 @@ func (handler *workflowTaskHandlerImpl) handleCommand(ctx context.Context, comma
 	}
 }
 
+func (handler *workflowTaskHandlerImpl) handleMessages(
+	ctx context.Context,
+	messages []*protocolpb.Message,
+) error {
+	if err := handler.attrValidator.validateMessages(
+		messages,
+	); err != nil {
+		return err
+	}
+
+	for _, message := range messages {
+		err := handler.handleMessage(ctx, message)
+		if err != nil || handler.stopProcessing {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (handler *workflowTaskHandlerImpl) handleMessage(_ context.Context, _ *protocolpb.Message) error {
+
+	return nil
+}
+
 func (handler *workflowTaskHandlerImpl) handleCommandScheduleActivity(
 	_ context.Context,
 	attr *commandpb.ScheduleActivityTaskCommandAttributes,

service/history/workflowTaskHandlerCallbacks.go

@@ -386,9 +386,11 @@ func (handler *workflowTaskHandlerCallbacksImpl) handleWorkflowTaskCompleted(
 			metrics.OperationTag(metrics.HistoryRespondWorkflowTaskCompletedScope))
 	}
 
-	workflowTaskHeartbeating := request.GetForceCreateNewWorkflowTask() && len(request.Commands) == 0
+	workflowTaskHeartbeating := request.GetForceCreateNewWorkflowTask() && len(request.Commands) == 0 && len(request.Messages) == 0
 	var workflowTaskHeartbeatTimeout bool
 	var completedEvent *historypb.HistoryEvent
+	var responseMutations []workflowTaskResponseMutation
+
 	if workflowTaskHeartbeating {
 		namespace := namespaceEntry.Name()
 		timeout := handler.config.WorkflowTaskHeartbeatTimeout(namespace.String())
@@ -423,11 +425,8 @@ func (handler *workflowTaskHandlerCallbacksImpl) handleWorkflowTaskCompleted(
 		wtFailedCause               *workflowTaskFailedCause
 		activityNotStartedCancelled bool
 		newMutableState             workflow.MutableState
-
-		hasUnhandledEvents bool
-		responseMutations  []workflowTaskResponseMutation
 	)
-	hasUnhandledEvents = ms.HasBufferedEvents()
+	hasBufferedEvents := ms.HasBufferedEvents()
 
 	if request.StickyAttributes == nil || request.StickyAttributes.WorkerTaskQueue == nil {
 		handler.metricsHandler.Counter(metrics.CompleteWorkflowTaskWithStickyDisabledCounter.GetMetricName()).Record(
@@ -481,7 +480,7 @@ func (handler *workflowTaskHandlerCallbacksImpl) handleWorkflowTaskCompleted(
 			handler.config,
 			handler.shard,
 			handler.searchAttributesMapper,
-			hasUnhandledEvents,
+			hasBufferedEvents,
 		)
 
 		if responseMutations, err = workflowTaskHandler.handleCommands(
@@ -491,6 +490,13 @@ func (handler *workflowTaskHandlerCallbacksImpl) handleWorkflowTaskCompleted(
 			return nil, err
 		}
 
+		if err = workflowTaskHandler.handleMessages(
+			ctx,
+			request.Messages,
+		); err != nil {
+			return nil, err
+		}
+
 		// set the vars used by following logic
 		// further refactor should also clean up the vars used below
 		wtFailedCause = workflowTaskHandler.workflowTaskFailedCause
@@ -501,7 +507,7 @@ func (handler *workflowTaskHandlerCallbacksImpl) handleWorkflowTaskCompleted(
 
 		newMutableState = workflowTaskHandler.newMutableState
 
-		hasUnhandledEvents = workflowTaskHandler.hasBufferedEvents
+		hasBufferedEvents = workflowTaskHandler.hasBufferedEvents
 	}
 
 	if wtFailedCause != nil {
@@ -522,7 +528,7 @@ func (handler *workflowTaskHandlerCallbacksImpl) handleWorkflowTaskCompleted(
 		if err != nil {
 			return nil, err
 		}
-		hasUnhandledEvents = true
+		hasBufferedEvents = true
 		newMutableState = nil
 
 		if wtFailedCause.workflowFailure != nil {
@@ -532,24 +538,37 @@ func (handler *workflowTaskHandlerCallbacksImpl) handleWorkflowTaskCompleted(
 			if _, err := ms.AddFailWorkflowEvent(nextEventBatchId, enumspb.RETRY_STATE_NON_RETRYABLE_FAILURE, attributes, ""); err != nil {
 				return nil, err
 			}
-			hasUnhandledEvents = false
+			hasBufferedEvents = false
 		}
 	}
 
-	createNewWorkflowTask := ms.IsWorkflowExecutionRunning() && (hasUnhandledEvents || request.GetForceCreateNewWorkflowTask() || activityNotStartedCancelled)
+	newWorkflowTaskType := enumsspb.WORKFLOW_TASK_TYPE_UNSPECIFIED
+	if ms.IsWorkflowExecutionRunning() && (hasBufferedEvents || request.GetForceCreateNewWorkflowTask() || activityNotStartedCancelled) {
+		newWorkflowTaskType = enumsspb.WORKFLOW_TASK_TYPE_NORMAL
+	}
+	createNewWorkflowTask := newWorkflowTaskType != enumsspb.WORKFLOW_TASK_TYPE_UNSPECIFIED
+
 	var newWorkflowTaskScheduledEventID int64
 	if createNewWorkflowTask {
+		// TODO (alex-update): Need to support case when ReturnNewWorkflowTask=false and WT.Type=Speculative.
+		// In this case WT needs to be added directly to matching.
+		// Current implementation will create normal WT.
 		bypassTaskGeneration := request.GetReturnNewWorkflowTask() && wtFailedCause == nil
+		if !bypassTaskGeneration {
+			// If task generation can't be bypassed workflow task must be of Normal type because Speculative workflow task always skip task generation.
+			newWorkflowTaskType = enumsspb.WORKFLOW_TASK_TYPE_NORMAL
+		}
+
 		var newWorkflowTask *workflow.WorkflowTaskInfo
 		var err error
 		if workflowTaskHeartbeating && !workflowTaskHeartbeatTimeout {
 			newWorkflowTask, err = ms.AddWorkflowTaskScheduledEventAsHeartbeat(
 				bypassTaskGeneration,
 				currentWorkflowTask.OriginalScheduledTime,
-				enumsspb.WORKFLOW_TASK_TYPE_NORMAL,
+				enumsspb.WORKFLOW_TASK_TYPE_NORMAL, // Heartbeat workflow task is always of Normal type.
 			)
 		} else {
-			newWorkflowTask, err = ms.AddWorkflowTaskScheduledEvent(bypassTaskGeneration, enumsspb.WORKFLOW_TASK_TYPE_NORMAL)
+			newWorkflowTask, err = ms.AddWorkflowTaskScheduledEvent(bypassTaskGeneration, newWorkflowTaskType)
 		}
 		if err != nil {
 			return nil, err
@@ -661,7 +680,6 @@ func (handler *workflowTaskHandlerCallbacksImpl) handleWorkflowTaskCompleted(
 	}
 
 	return resp, nil
-
 }
 
 func (handler *workflowTaskHandlerCallbacksImpl) verifyFirstWorkflowTaskScheduled(

tests/integration_test.go

@@ -26,9 +26,12 @@ package tests
 
 import (
 	"flag"
+	"reflect"
 	"testing"
 	"time"
 
+	"github.com/gogo/protobuf/proto"
+	"github.com/gogo/protobuf/types"
 	"github.com/stretchr/testify/require"
 	"github.com/stretchr/testify/suite"
 	commonpb "go.temporal.io/api/common/v1"
@@ -79,3 +82,21 @@ func (s *integrationSuite) sendSignal(namespace string, execution *commonpb.Work
 
 	return err
 }
+
+func unmarshalAny[T proto.Message](s *integrationSuite, a *types.Any) T {
+	s.T().Helper()
+	pb := new(T)
+	ppb := reflect.ValueOf(pb).Elem()
+	pbNew := reflect.New(reflect.TypeOf(pb).Elem().Elem())
+	ppb.Set(pbNew)
+	err := types.UnmarshalAny(a, *pb)
+	s.NoError(err)
+	return *pb
+}
+
+func marshalAny(s *integrationSuite, pb proto.Message) *types.Any {
+	s.T().Helper()
+	a, err := types.MarshalAny(pb)
+	s.NoError(err)
+	return a
+}

tests/integrationbase.go

@@ -222,7 +222,7 @@ func (s *IntegrationBase) randomizeStr(id string) string {
 
 func (s *IntegrationBase) printWorkflowHistory(namespace string, execution *commonpb.WorkflowExecution) {
 	events := s.getHistory(namespace, execution)
-	common.PrettyPrintHistory(&historypb.History{Events: events})
+	common.PrettyPrint(events)
 }
 
 //lint:ignore U1000 used for debugging.