Add handling of business ID policy for standalone activities (#8712)

## What changed?
Add handling of business ID policy for standalone activities. Refactored
standalone activity validations.

## Why?
Required so that the chasm engine will handle the business ID policies
based on the RPC request.

## How did you test it?
- [X] built
- [X] run locally and tested manually
- [X] covered by existing tests
- [X] added new unit test(s)
- [X] added new functional test(s)

## Potential risks
Will need to add more tests once we rebase standalone-activity with
main.

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Adds business ID reuse/conflict policy handling for standalone
activities, refactors validation to operate on the full request with
sane defaults, and updates tests accordingly.
> 
> - **Activity Backend**:
> - Map `enumspb` activity ID reuse/conflict policies to chasm policies
and pass via `chasm.WithBusinessIDPolicy` in `StartActivityExecution`.
>   - Propagate `RequestId` via `chasm.WithRequestID`.
> - **Validation**:
> - Refactor `ValidateStandaloneActivity` to accept the entire
`workflowservice.StartActivityExecutionRequest` and mutate in place
(request ID, ID policies, input size, search attributes).
> - Add `normalizeAndValidateIDPolicy` with defaults and incompatibility
checks; require request ID when attaching completion callbacks.
>   - Minor tweaks to input/search attributes validation paths.
> - **Frontend**:
> - Update `validateAndPopulateStartRequest` to use new validation
signatures and remove redundant vars.
> - **Tests**:
> - Add/extend unit tests for ID policy defaults/mismatch, input size
warning/error, and request ID length.
> - Add functional tests covering ID reuse (`REJECT_DUPLICATE`,
`ALLOW_DUPLICATE_FAILED_ONLY`) and conflict policy failure on existing
execution.
> - Adjust cancellation tests to use unique `RequestId`; remove default
`RequestId` from `startActivity` helper.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
1225ccc. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

---------

Co-authored-by: Dan Davison <dan.davison@temporal.io>

Author: fretz12

chasm/lib/activity/handler.go

@@ -3,14 +3,29 @@ package activity
 import (
 	"context"
 	"errors"
+	"fmt"
 
+	enumspb "go.temporal.io/api/enums/v1"
 	"go.temporal.io/api/serviceerror"
 	"go.temporal.io/api/workflowservice/v1"
 	"go.temporal.io/server/chasm"
 	"go.temporal.io/server/chasm/lib/activity/gen/activitypb/v1"
 	"go.temporal.io/server/common/contextutil"
 )
 
+var (
+	businessIDReusePolicyMap = map[enumspb.ActivityIdReusePolicy]chasm.BusinessIDReusePolicy{
+		enumspb.ACTIVITY_ID_REUSE_POLICY_ALLOW_DUPLICATE:             chasm.BusinessIDReusePolicyAllowDuplicate,
+		enumspb.ACTIVITY_ID_REUSE_POLICY_ALLOW_DUPLICATE_FAILED_ONLY: chasm.BusinessIDReusePolicyAllowDuplicateFailedOnly,
+		enumspb.ACTIVITY_ID_REUSE_POLICY_REJECT_DUPLICATE:            chasm.BusinessIDReusePolicyRejectDuplicate,
+	}
+
+	// TODO this will change once we rebase on main
+	businessIDConflictPolicyMap = map[enumspb.ActivityIdConflictPolicy]chasm.BusinessIDConflictPolicy{
+		enumspb.ACTIVITY_ID_CONFLICT_POLICY_FAIL: chasm.BusinessIDConflictPolicyFail,
+	}
+)
+
 type handler struct {
 	activitypb.UnimplementedActivityServiceServer
 	config *Config
@@ -23,6 +38,18 @@ func newHandler(config *Config) *handler {
 }
 
 func (h *handler) StartActivityExecution(ctx context.Context, req *activitypb.StartActivityExecutionRequest) (*activitypb.StartActivityExecutionResponse, error) {
+	frontendReq := req.GetFrontendRequest()
+
+	reusePolicy, ok := businessIDReusePolicyMap[frontendReq.GetIdReusePolicy()]
+	if !ok {
+		return nil, serviceerror.NewFailedPrecondition(fmt.Sprintf("unsupported ID reuse policy: %v", frontendReq.GetIdReusePolicy()))
+	}
+
+	conflictPolicy, ok := businessIDConflictPolicyMap[frontendReq.GetIdConflictPolicy()]
+	if !ok {
+		return nil, serviceerror.NewFailedPrecondition(fmt.Sprintf("unsupported ID conflict policy: %v", frontendReq.GetIdConflictPolicy()))
+	}
+
 	response, key, _, err := chasm.NewEntity(
 		ctx,
 		chasm.EntityKey{
@@ -47,6 +74,7 @@ func (h *handler) StartActivityExecution(ctx context.Context, req *activitypb.St
 		},
 		req.GetFrontendRequest(),
 		chasm.WithRequestID(req.GetFrontendRequest().GetRequestId()),
+		chasm.WithBusinessIDPolicy(reusePolicy, conflictPolicy),
 	)
 
 	if err != nil {

chasm/lib/activity/validator.go

@@ -1,11 +1,10 @@
 package activity
 
 import (
-	"fmt"
-
 	"github.com/google/uuid"
 	activitypb "go.temporal.io/api/activity/v1"
 	commonpb "go.temporal.io/api/common/v1"
+	enumspb "go.temporal.io/api/enums/v1"
 	"go.temporal.io/api/serviceerror"
 	"go.temporal.io/api/workflowservice/v1"
 	"go.temporal.io/server/common"
@@ -43,7 +42,7 @@ func ValidateAndNormalizeActivityAttributes(
 	runTimeout *durationpb.Duration,
 ) error {
 	if err := tqid.NormalizeAndValidate(options.TaskQueue, "", maxIDLengthLimit); err != nil {
-		return fmt.Errorf("invalid TaskQueue: %w. ActivityId=%s ActivityType=%s", err, activityID, activityType)
+		return err
 	}
 
 	if activityID == "" {
@@ -54,7 +53,7 @@ func ValidateAndNormalizeActivityAttributes(
 	}
 
 	if err := validateActivityRetryPolicy(namespaceID, options.RetryPolicy, getDefaultActivityRetrySettings); err != nil {
-		return fmt.Errorf("invalid ActivityRetryPolicy: %w. ActivityId=%s ActivityType=%s", err, activityID, activityType)
+		return err
 	}
 
 	if len(activityID) > maxIDLengthLimit {
@@ -182,6 +181,10 @@ func validateAndNormalizeStartActivityExecutionRequest(
 		return serviceerror.NewInvalidArgument("RequestID length exceeds limit.")
 	}
 
+	if err := normalizeAndValidateIDPolicy(req); err != nil {
+		return err
+	}
+
 	if err := validateInputSize(
 		req.GetActivityId(),
 		req.GetActivityType().GetName(),
@@ -204,6 +207,18 @@ func validateAndNormalizeStartActivityExecutionRequest(
 	return nil
 }
 
+func normalizeAndValidateIDPolicy(req *workflowservice.StartActivityExecutionRequest) error {
+	if req.GetIdReusePolicy() == enumspb.ACTIVITY_ID_REUSE_POLICY_UNSPECIFIED {
+		req.IdReusePolicy = enumspb.ACTIVITY_ID_REUSE_POLICY_ALLOW_DUPLICATE
+	}
+
+	if req.GetIdConflictPolicy() == enumspb.ACTIVITY_ID_CONFLICT_POLICY_UNSPECIFIED {
+		req.IdConflictPolicy = enumspb.ACTIVITY_ID_CONFLICT_POLICY_FAIL
+	}
+
+	return nil
+}
+
 func validateInputSize(
 	activityID string,
 	blobSizeViolationTagValue string,

chasm/lib/activity/validator_test.go

@@ -7,6 +7,8 @@ import (
 	"github.com/stretchr/testify/require"
 	activitypb "go.temporal.io/api/activity/v1"
 	commonpb "go.temporal.io/api/common/v1"
+	enumspb "go.temporal.io/api/enums/v1"
+	"go.temporal.io/api/serviceerror"
 	taskqueuepb "go.temporal.io/api/taskqueue/v1"
 	"go.temporal.io/api/workflowservice/v1"
 	"go.temporal.io/server/common/dynamicconfig"
@@ -209,7 +211,8 @@ func TestValidateFailures(t *testing.T) {
 				tc.options,
 				tc.priority,
 				durationpb.New(0))
-			require.Error(t, err)
+			var invalidArgErr *serviceerror.InvalidArgument
+			require.ErrorAs(t, err, &invalidArgErr)
 		})
 	}
 }
@@ -231,7 +234,8 @@ func TestValidateStandAloneRequestIDTooLong(t *testing.T) {
 		log.NewNoopLogger(),
 		defaultMaxIDLengthLimit,
 		nil)
-	require.Error(t, err)
+	var invalidArgErr *serviceerror.InvalidArgument
+	require.ErrorAs(t, err, &invalidArgErr)
 }
 
 func TestValidateStandAloneInputTooLarge(t *testing.T) {
@@ -251,7 +255,8 @@ func TestValidateStandAloneInputTooLarge(t *testing.T) {
 		log.NewNoopLogger(),
 		defaultMaxIDLengthLimit,
 		nil)
-	require.Error(t, err)
+	var invalidArgErr *serviceerror.InvalidArgument
+	require.ErrorAs(t, err, &invalidArgErr)
 }
 
 func TestValidateStandAloneInputWarningSizeShouldSucceed(t *testing.T) {
@@ -277,6 +282,28 @@ func TestValidateStandAloneInputWarningSizeShouldSucceed(t *testing.T) {
 	require.NoError(t, err)
 }
 
+func TestValidateStandAlone_IDPolicyShouldDefault(t *testing.T) {
+	req := &workflowservice.StartActivityExecutionRequest{
+		ActivityId:   defaultActivityID,
+		ActivityType: &commonpb.ActivityType{Name: defaultActivityType},
+		Options:      &defaultActivityOptions,
+		Namespace:    "default",
+		RequestId:    "test-request-id",
+	}
+
+	err := validateAndNormalizeStartActivityExecutionRequest(
+		req,
+		defaultBlobSizeLimitError,
+		defaultBlobSizeLimitWarn,
+		log.NewNoopLogger(),
+		defaultMaxIDLengthLimit,
+		nil)
+
+	require.NoError(t, err)
+	require.Equal(t, enumspb.ACTIVITY_ID_REUSE_POLICY_ALLOW_DUPLICATE, req.IdReusePolicy)
+	require.Equal(t, enumspb.ACTIVITY_ID_CONFLICT_POLICY_FAIL, req.IdConflictPolicy)
+}
+
 func TestModifiedActivityTimeouts(t *testing.T) {
 	cases := []struct {
 		name       string
@@ -406,7 +433,8 @@ func TestModifiedActivityTimeouts(t *testing.T) {
 				tc.runTimeout)
 
 			if tc.isErr {
-				require.Error(t, err)
+				var invalidArgErr *serviceerror.InvalidArgument
+				require.ErrorAs(t, err, &invalidArgErr)
 				return
 			}
 

tests/standalone_activity_test.go

@@ -62,6 +62,115 @@ func (s *standaloneActivityTestSuite) SetupTest() {
 	s.tv = testvars.New(s.T())
 }
 
+func (s *standaloneActivityTestSuite) TestIDReusePolicy_RejectDuplicate() {
+	t := s.T()
+	ctx, cancel := context.WithTimeout(t.Context(), 10*time.Second)
+	defer cancel()
+
+	activityID := s.tv.ActivityID()
+	taskQueue := s.tv.TaskQueue().String()
+
+	startResp := s.startAndValidateActivity(ctx, t, activityID, taskQueue)
+	runID := startResp.RunId
+
+	pollTaskResp := s.pollActivityTaskAndValidate(ctx, t, activityID, taskQueue, runID)
+
+	_, err := s.FrontendClient().RespondActivityTaskCompleted(ctx, &workflowservice.RespondActivityTaskCompletedRequest{
+		Namespace: s.Namespace().String(),
+		TaskToken: pollTaskResp.TaskToken,
+		Result:    defaultResult,
+		Identity:  "new-worker",
+	})
+	require.NoError(t, err)
+
+	s.validateCompletion(ctx, t, activityID, runID, "new-worker")
+
+	_, err = s.FrontendClient().StartActivityExecution(ctx, &workflowservice.StartActivityExecutionRequest{
+		Namespace:    s.Namespace().String(),
+		ActivityId:   activityID,
+		ActivityType: s.tv.ActivityType(),
+		Identity:     s.tv.WorkerIdentity(),
+		Input:        defaultInput,
+		Options: &activitypb.ActivityOptions{
+			TaskQueue: &taskqueuepb.TaskQueue{
+				Name: taskQueue,
+			},
+			StartToCloseTimeout: durationpb.New(1 * time.Minute),
+		},
+		IdReusePolicy: enumspb.ACTIVITY_ID_REUSE_POLICY_REJECT_DUPLICATE,
+	})
+	require.Error(t, err)
+}
+
+func (s *standaloneActivityTestSuite) TestIDReusePolicy_AllowDuplicateFailedOnly() {
+	t := s.T()
+	ctx, cancel := context.WithTimeout(t.Context(), 10*time.Second)
+	defer cancel()
+
+	activityID := s.tv.ActivityID()
+	taskQueue := s.tv.TaskQueue().String()
+
+	startResp := s.startAndValidateActivity(ctx, t, activityID, taskQueue)
+	runID := startResp.RunId
+
+	pollTaskResp := s.pollActivityTaskAndValidate(ctx, t, activityID, taskQueue, runID)
+
+	_, err := s.FrontendClient().RespondActivityTaskFailed(ctx, &workflowservice.RespondActivityTaskFailedRequest{
+		Namespace: s.Namespace().String(),
+		TaskToken: pollTaskResp.TaskToken,
+		Failure:   defaultFailure,
+		Identity:  "new-worker",
+	})
+	require.NoError(t, err)
+
+	s.validateFailure(ctx, t, activityID, runID, nil, "new-worker")
+
+	_, err = s.FrontendClient().StartActivityExecution(ctx, &workflowservice.StartActivityExecutionRequest{
+		Namespace:    s.Namespace().String(),
+		ActivityId:   activityID,
+		ActivityType: s.tv.ActivityType(),
+		Identity:     s.tv.WorkerIdentity(),
+		Input:        defaultInput,
+		Options: &activitypb.ActivityOptions{
+			TaskQueue: &taskqueuepb.TaskQueue{
+				Name: taskQueue,
+			},
+			StartToCloseTimeout: durationpb.New(1 * time.Minute),
+		},
+		IdReusePolicy: enumspb.ACTIVITY_ID_REUSE_POLICY_ALLOW_DUPLICATE_FAILED_ONLY,
+	})
+	require.NoError(t, err)
+}
+
+func (s *standaloneActivityTestSuite) TestIDConflictPolicy_FailsIfExists() {
+	t := s.T()
+	ctx, cancel := context.WithTimeout(t.Context(), 10*time.Second)
+	defer cancel()
+
+	activityID := s.tv.ActivityID()
+	taskQueue := s.tv.TaskQueue().String()
+
+	s.startAndValidateActivity(ctx, t, activityID, taskQueue)
+
+	// By default, unspecified conflict policy should be set to ACTIVITY_ID_CONFLICT_POLICY_FAIL, so no need to set explicitly
+	_, err := s.FrontendClient().StartActivityExecution(ctx, &workflowservice.StartActivityExecutionRequest{
+		Namespace:    s.Namespace().String(),
+		ActivityId:   activityID,
+		ActivityType: s.tv.ActivityType(),
+		Identity:     s.tv.WorkerIdentity(),
+		Input:        defaultInput,
+		Options: &activitypb.ActivityOptions{
+			TaskQueue: &taskqueuepb.TaskQueue{
+				Name: taskQueue,
+			},
+			StartToCloseTimeout: durationpb.New(1 * time.Minute),
+		},
+	})
+	require.Error(t, err)
+}
+
+// TODO(fred): add test for BusinessIDConflictPolicyUseExisting after rebasing on main
+
 func (s *standaloneActivityTestSuite) TestActivityCompleted() {
 	t := s.T()
 	ctx, cancel := context.WithTimeout(t.Context(), 10*time.Second)