feat(workflows/handler): adds all event handlers

core/services/workflows/syncer/engine_registry.go

@@ -36,6 +36,18 @@ func (r *engineRegistry) Get(id string) (*workflows.Engine, error) {
 	return engine, nil
 }
 
+// IsRunning is true if the engine exists and is ready.
+func (r *engineRegistry) IsRunning(id string) bool {
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+	engine, found := r.engines[id]
+	if !found {
+		return false
+	}
+
+	return engine.Ready() == nil
+}
+
 // Pop removes an engine from the registry and returns the engine if found.
 func (r *engineRegistry) Pop(id string) (*workflows.Engine, error) {
 	r.mu.Lock()

core/services/workflows/syncer/handler.go

@@ -180,11 +180,82 @@ func (h *eventHandler) Handle(ctx context.Context, event WorkflowRegistryEvent)
 		h.lggr.Debugf("workflow 0x%x registered and started", wfID)
 		return nil
 	case WorkflowUpdatedEvent:
-		return h.workflowUpdatedEvent(ctx, event)
+		payload, ok := event.Data.(WorkflowRegistryWorkflowUpdatedV1)
+		if !ok {
+			return fmt.Errorf("invalid data type %T for event", event.Data)
+		}
+
+		newWorkflowID := hex.EncodeToString(payload.NewWorkflowID[:])
+		cma := h.emitter.With(
+			platform.KeyWorkflowID, newWorkflowID,
+			platform.KeyWorkflowName, payload.WorkflowName,
+			platform.KeyWorkflowOwner, hex.EncodeToString(payload.WorkflowOwner),
+		)
+
+		if err := h.workflowUpdatedEvent(ctx, payload); err != nil {
+			logCustMsg(ctx, cma, fmt.Sprintf("failed to handle workflow updated event: %v", err), h.lggr)
+			return err
+		}
+
+		return nil
 	case WorkflowPausedEvent:
-		return h.workflowPausedEvent(ctx, event)
+		payload, ok := event.Data.(WorkflowRegistryWorkflowPausedV1)
+		if !ok {
+			return fmt.Errorf("invalid data type %T for event", event.Data)
+		}
+
+		wfID := hex.EncodeToString(payload.WorkflowID[:])
+
+		cma := h.emitter.With(
+			platform.KeyWorkflowID, wfID,
+			platform.KeyWorkflowName, payload.WorkflowName,
+			platform.KeyWorkflowOwner, hex.EncodeToString(payload.WorkflowOwner),
+		)
+
+		if err := h.workflowPausedEvent(ctx, payload); err != nil {
+			logCustMsg(ctx, cma, fmt.Sprintf("failed to handle workflow paused event: %v", err), h.lggr)
+			return err
+		}
+		return nil
 	case WorkflowActivatedEvent:
-		return h.workflowActivatedEvent(ctx, event)
+		payload, ok := event.Data.(WorkflowRegistryWorkflowActivatedV1)
+		if !ok {
+			return fmt.Errorf("invalid data type %T for event", event.Data)
+		}
+
+		wfID := hex.EncodeToString(payload.WorkflowID[:])
+
+		cma := h.emitter.With(
+			platform.KeyWorkflowID, wfID,
+			platform.KeyWorkflowName, payload.WorkflowName,
+			platform.KeyWorkflowOwner, hex.EncodeToString(payload.WorkflowOwner),
+		)
+		if err := h.workflowActivatedEvent(ctx, payload); err != nil {
+			logCustMsg(ctx, cma, fmt.Sprintf("failed to handle workflow activated event: %v", err), h.lggr)
+			return err
+		}
+
+		return nil
+	case WorkflowDeletedEvent:
+		payload, ok := event.Data.(WorkflowRegistryWorkflowDeletedV1)
+		if !ok {
+			return fmt.Errorf("invalid data type %T for event", event.Data)
+		}
+
+		wfID := hex.EncodeToString(payload.WorkflowID[:])
+
+		cma := h.emitter.With(
+			platform.KeyWorkflowID, wfID,
+			platform.KeyWorkflowName, payload.WorkflowName,
+			platform.KeyWorkflowOwner, hex.EncodeToString(payload.WorkflowOwner),
+		)
+
+		if err := h.workflowDeletedEvent(ctx, payload); err != nil {
+			logCustMsg(ctx, cma, fmt.Sprintf("failed to handle workflow deleted event: %v", err), h.lggr)
+			return err
+		}
+
+		return nil
 	default:
 		return fmt.Errorf("event type unsupported: %v", event.EventType)
 	}
@@ -284,28 +355,107 @@ func (h *eventHandler) workflowRegisteredEvent(
 	return nil
 }
 
-// workflowUpdatedEvent handles the WorkflowUpdatedEvent event type.
+// workflowUpdatedEvent handles the WorkflowUpdatedEvent event type by first finding the
+// current workflow engine, stopping it, and then starting a new workflow engine with the
+// updated workflow spec.
 func (h *eventHandler) workflowUpdatedEvent(
-	_ context.Context,
-	_ WorkflowRegistryEvent,
+	ctx context.Context,
+	payload WorkflowRegistryWorkflowUpdatedV1,
 ) error {
-	return ErrNotImplemented
+	// Remove the old workflow engine from the local registry if it exists
+	if err := h.tryEngineCleanup(hex.EncodeToString(payload.OldWorkflowID[:])); err != nil {
+		return err
+	}
+
+	registeredEvent := WorkflowRegistryWorkflowRegisteredV1{
+		WorkflowID:    payload.NewWorkflowID,
+		WorkflowOwner: payload.WorkflowOwner,
+		DonID:         payload.DonID,
+		Status:        0,
+		WorkflowName:  payload.WorkflowName,
+		BinaryURL:     payload.BinaryURL,
+		ConfigURL:     payload.ConfigURL,
+		SecretsURL:    payload.SecretsURL,
+	}
+
+	return h.workflowRegisteredEvent(ctx, registeredEvent)
 }
 
 // workflowPausedEvent handles the WorkflowPausedEvent event type.
 func (h *eventHandler) workflowPausedEvent(
-	_ context.Context,
-	_ WorkflowRegistryEvent,
+	ctx context.Context,
+	payload WorkflowRegistryWorkflowPausedV1,
 ) error {
-	return ErrNotImplemented
+	// Remove the workflow engine from the local registry if it exists
+	if err := h.tryEngineCleanup(hex.EncodeToString(payload.WorkflowID[:])); err != nil {
+		return err
+	}
+
+	// get existing workflow spec from DB
+	spec, err := h.orm.GetWorkflowSpec(ctx, hex.EncodeToString(payload.WorkflowOwner), payload.WorkflowName)
+	if err != nil {
+		return fmt.Errorf("failed to get workflow spec: %w", err)
+	}
+
+	// update the status of the workflow spec
+	spec.Status = job.WorkflowSpecStatusPaused
+	if _, err := h.orm.UpsertWorkflowSpec(ctx, spec); err != nil {
+		return fmt.Errorf("failed to update workflow spec: %w", err)
+	}
+
+	return nil
 }
 
 // workflowActivatedEvent handles the WorkflowActivatedEvent event type.
 func (h *eventHandler) workflowActivatedEvent(
-	_ context.Context,
-	_ WorkflowRegistryEvent,
+	ctx context.Context,
+	payload WorkflowRegistryWorkflowActivatedV1,
+) error {
+	// fetch the workflow spec from the DB
+	spec, err := h.orm.GetWorkflowSpec(ctx, hex.EncodeToString(payload.WorkflowOwner), payload.WorkflowName)
+	if err != nil {
+		return fmt.Errorf("failed to get workflow spec: %w", err)
+	}
+
+	// Do nothing if the workflow is already active
+	if spec.Status == job.WorkflowSpecStatusActive && h.engineRegistry.IsRunning(hex.EncodeToString(payload.WorkflowID[:])) {
+		return nil
+	}
+
+	// get the secrets url by the secrets id
+	secretsURL, err := h.orm.GetSecretsURLByID(ctx, spec.SecretsID.Int64)
+	if err != nil {
+		return fmt.Errorf("failed to get secrets URL by ID: %w", err)
+	}
+
+	// start a new workflow engine
+	registeredEvent := WorkflowRegistryWorkflowRegisteredV1{
+		WorkflowID:    payload.WorkflowID,
+		WorkflowOwner: payload.WorkflowOwner,
+		DonID:         payload.DonID,
+		Status:        0,
+		WorkflowName:  payload.WorkflowName,
+		BinaryURL:     spec.BinaryURL,
+		ConfigURL:     spec.ConfigURL,
+		SecretsURL:    secretsURL,
+	}
+
+	return h.workflowRegisteredEvent(ctx, registeredEvent)
+}
+
+// workflowDeletedEvent handles the WorkflowDeletedEvent event type.
+func (h *eventHandler) workflowDeletedEvent(
+	ctx context.Context,
+	payload WorkflowRegistryWorkflowDeletedV1,
 ) error {
-	return ErrNotImplemented
+	if err := h.tryEngineCleanup(hex.EncodeToString(payload.WorkflowID[:])); err != nil {
+		return err
+	}
+
+	if err := h.orm.DeleteWorkflowSpec(ctx, hex.EncodeToString(payload.WorkflowOwner), payload.WorkflowName); err != nil {
+		return fmt.Errorf("failed to delete workflow spec: %w", err)
+	}
+	return nil
 }
 
 // forceUpdateSecretsEvent handles the ForceUpdateSecretsEvent event type.
@@ -335,6 +485,24 @@ func (h *eventHandler) forceUpdateSecretsEvent(
 	return nil
 }
 
+// tryEngineCleanup attempts to stop the workflow engine for the given workflow ID.  Does nothing if the
+// workflow engine is not running.
+func (h *eventHandler) tryEngineCleanup(wfID string) error {
+	if h.engineRegistry.IsRunning(wfID) {
+		// Remove the engine from the registry
+		e, err := h.engineRegistry.Pop(wfID)
+		if err != nil {
+			return fmt.Errorf("failed to get workflow engine: %w", err)
+		}
+
+		// Stop the engine
+		if err := e.Close(); err != nil {
+			return fmt.Errorf("failed to close workflow engine: %w", err)
+		}
+	}
+	return nil
+}
+
 // workflowID returns a hex encoded sha256 hash of the wasm, config and secretsURL.
 func workflowID(wasm, config, secretsURL []byte) string {
 	sum := sha256.New()