added long-running materialization support to wren

wren/compute/compute_manager.go

@@ -22,6 +22,7 @@ import (
 	"github.com/kaskada-ai/kaskada/wren/client"
 	"github.com/kaskada-ai/kaskada/wren/customerrors"
 	"github.com/kaskada-ai/kaskada/wren/ent"
+	"github.com/kaskada-ai/kaskada/wren/ent/materialization"
 	"github.com/kaskada-ai/kaskada/wren/internal"
 	"github.com/kaskada-ai/kaskada/wren/utils"
 )
@@ -39,7 +40,9 @@ type ComputeManager interface {
 	InitiateQuery(queryContext *QueryContext) (client.ComputeServiceClient, v1alpha.ComputeService_ExecuteClient, error)
 	SaveComputeSnapshots(queryContext *QueryContext, computeSnapshots []*v1alpha.ComputeSnapshot)
 
-	// materialization related
+	// Runs all existing file-based materializations for the given owner
+	// Note: this exists in the ComputeManager interface instead of the MaterializationManager interface because
+	// it runs materializations in a similar way to InitiateQuery
 	RunMaterializations(ctx context.Context, owner *ent.Owner)
 }
 
@@ -201,6 +204,8 @@ func (m *computeManager) SaveComputeSnapshots(queryContext *QueryContext, comput
 }
 
 // Runs all saved materializations on current data inside a go-routine that attempts to finish before shutdown
+// TODO: After sparrow supports long-running materializations from file-based sources 
+// remove all the code related to this method
 func (m *computeManager) RunMaterializations(requestCtx context.Context, owner *ent.Owner) {
 	m.errGroup.Go(func() error { return m.processMaterializations(requestCtx, owner) })
 }
@@ -229,7 +234,7 @@ func (m *computeManager) processMaterializations(requestCtx context.Context, own
 		subLogger.Error().Err(err).Msg("issue getting current prepare cache buster")
 	}
 
-	materializations, err := m.materializationClient.GetAllMaterializations(ctx, owner)
+	materializations, err := m.materializationClient.GetMaterializationsBySourceType(ctx, owner, materialization.SourceTypeFiles)
 	if err != nil {
 		subLogger.Error().Err(err).Msg("error listing materializations")
 		return nil

wren/compute/file_manager.go

@@ -12,8 +12,12 @@ import (
 )
 
 type FileManager interface {
-	// metadata related
+
+	// GetFileSchema returns the schema of the file at the given URI.
 	GetFileSchema(ctx context.Context, fileInput internal.FileInput) (*v1alpha.Schema, error)
+
+	// GetPulsarSchema returns the schema of the pulsar topic
+	GetPulsarSchema(ctx context.Context, pulsarConfig *v1alpha.PulsarConfig) (*v1alpha.Schema, error)
 }
 
 type fileManager struct {
@@ -27,7 +31,7 @@ func NewFileManager(computeClients *client.ComputeClients) FileManager {
 }
 
 func (m *fileManager) GetFileSchema(ctx context.Context, fileInput internal.FileInput) (*v1alpha.Schema, error) {
-	subLogger := log.Ctx(ctx).With().Str("method", "manager.GetFileSchema").Str("uri", fileInput.GetURI()).Str("type", fileInput.GetExtension()).Logger()
+	subLogger := log.Ctx(ctx).With().Str("method", "fileManager.GetFileSchema").Str("uri", fileInput.GetURI()).Str("type", fileInput.GetExtension()).Logger()
 	// Send the metadata request to the FileService
 
 	var sourceData *v1alpha.SourceData
@@ -42,6 +46,24 @@ func (m *fileManager) GetFileSchema(ctx context.Context, fileInput internal.File
 		sourceData = &v1alpha.SourceData{Source: &v1alpha.SourceData_ParquetPath{ParquetPath: fileInput.GetURI()}}
 	}
 
+	return m.getSchema(ctx, sourceData)
+}
+
+func (m *fileManager) GetPulsarSchema(ctx context.Context, pulsarConfig *v1alpha.PulsarConfig) (*v1alpha.Schema, error) {
+	sourceData := &v1alpha.SourceData{
+		Source: &v1alpha.SourceData_PulsarSubscription{
+			PulsarSubscription: &v1alpha.PulsarSubscription{
+				Config: pulsarConfig,
+			},
+		},
+	}
+
+	return m.getSchema(ctx, sourceData)
+}
+
+func (m *fileManager) getSchema(ctx context.Context, sourceData *v1alpha.SourceData) (*v1alpha.Schema, error) {
+	subLogger := log.Ctx(ctx).With().Str("method", "fileManager.getSchema").Logger()
+
 	fileClient := m.computeClients.NewFileServiceClient(ctx)
 	defer fileClient.Close()
 

wren/compute/materialization_manager.go

@@ -7,6 +7,7 @@ import (
 	"github.com/kaskada-ai/kaskada/wren/client"
 	"github.com/kaskada-ai/kaskada/wren/customerrors"
 	"github.com/kaskada-ai/kaskada/wren/ent"
+	"github.com/kaskada-ai/kaskada/wren/ent/materialization"
 	"github.com/kaskada-ai/kaskada/wren/internal"
 	"github.com/rs/zerolog/log"
 )
@@ -22,6 +23,9 @@ type MaterializationManager interface {
 
 	// GetMaterializationStatus gets the status of a materialization on the compute backend
 	GetMaterializationStatus(ctx context.Context, materializationID string) (*v1alpha.ProgressInformation, error)
+
+	// ReconcileMaterializations reconciles the materializations in the database with the materializations on the compute backend
+	ReconcileMaterializations(ctx context.Context) error
 }
 
 type materializationManager struct {
@@ -30,14 +34,19 @@ type materializationManager struct {
 	computeClients        client.ComputeClients
 	kaskadaTableClient    internal.KaskadaTableClient
 	materializationClient internal.MaterializationClient
+
+	// this is used to keep track of which materializations are currently running on the compute backend
+	// so that if a materialization is deleted from the database, we can stop it the next time we reconcile
+	runningMaterializations map[string]interface{}
 }
 
 func NewMaterializationManager(compileManager *CompileManager, computeClients *client.ComputeClients, kaskadaTableClient *internal.KaskadaTableClient, materializationClient *internal.MaterializationClient) MaterializationManager {
 	return &materializationManager{
-		CompileManager:        *compileManager,
-		computeClients:        *computeClients,
-		kaskadaTableClient:    *kaskadaTableClient,
-		materializationClient: *materializationClient,
+		CompileManager:          *compileManager,
+		computeClients:          *computeClients,
+		kaskadaTableClient:      *kaskadaTableClient,
+		materializationClient:   *materializationClient,
+		runningMaterializations: map[string]interface{}{},
 	}
 }
 
@@ -110,6 +119,77 @@ func (m *materializationManager) GetMaterializationStatus(ctx context.Context, m
 	return statusResponse.Progress, nil
 }
 
+// ReconcileMaterializations reconciles the materializations in the database with the materializations on the compute backend
+// After running this function, all materializations in the database will be running on the compute backend
+// and all deleted materializations will be stopped
+func (m *materializationManager) ReconcileMaterializations(ctx context.Context) error {
+	subLogger := log.Ctx(ctx).With().Str("method", "manager.ReconcileMaterializations").Logger()
+
+	allStreamMaterializations, err := m.materializationClient.GetAllMaterializationsBySourceType(ctx, materialization.SourceTypeStreams)
+	if err != nil {
+		subLogger.Error().Err(err).Msg("failed to get all stream materializations")
+		return err
+	}
+
+	// find all materializations in the database and start any that are not running
+	// we keep a map of materialization_name=>nil to keep track of which materializations are running
+	newRunningMaterializations := make(map[string]interface{})
+	for _, streamMaterialization := range allStreamMaterializations {
+		materializationID := streamMaterialization.ID.String()
+		owner := streamMaterialization.Edges.Owner
+
+		isRunning := false
+		// check to see if the materialization was running in the previous iteration
+		if _, found := m.runningMaterializations[materializationID]; found {
+			//verify that the materialization is still running
+			progressInfo, err := m.GetMaterializationStatus(ctx, materializationID)
+			if err != nil {
+				log.Error().Err(err).Str("id", materializationID).Msg("failed to get materialization status")
+			}
+			isRunning = progressInfo != nil
+		}
+
+		if isRunning {
+			newRunningMaterializations[materializationID] = nil
+		} else {
+			log.Debug().Str("id", materializationID).Msg("found materialization that is not running, attempting to start it")
+
+			compileResp, _, err := m.CompileEntMaterialization(ctx, owner, streamMaterialization)
+			if err != nil {
+				log.Error().Err(err).Str("id", materializationID).Msg("issue compiling materialization")
+			} else {
+				err = m.StartMaterialization(ctx, owner, materializationID, compileResp, streamMaterialization.Destination)
+				if err != nil {
+					log.Error().Err(err).Str("id", materializationID).Msg("failed to start materialization")
+				} else {
+					log.Debug().Str("id", materializationID).Msg("started materialization")
+					newRunningMaterializations[materializationID] = nil
+				}
+			}
+		}
+	}
+
+	// find all materializations that were running the previous time this method was called
+	// but no longer exist in the database. stop any that are found. this can happen due to a race
+	// condition where a materialization is deleted from the database after this method has started
+	// but before it has finished. this method is called periodically so it will eventually stop
+	// the materialization.
+	for materializationID := range m.runningMaterializations {
+		if _, found := newRunningMaterializations[materializationID]; !found {
+			log.Debug().Str("id", materializationID).Msg("found materialization that no longer exists, attempting to stop it")
+			err := m.StopMaterialization(ctx, materializationID)
+			if err != nil {
+				log.Error().Err(err).Str("id", materializationID).Msg("failed to stop materialization")
+				newRunningMaterializations[materializationID] = nil
+			} else {
+				log.Debug().Str("id", materializationID).Msg("stopped materialization")
+			}
+		}
+	}
+	m.runningMaterializations = newRunningMaterializations
+	return nil
+}
+
 func (m *materializationManager) getMaterializationTables(ctx context.Context, owner *ent.Owner, compileResp *v1alpha.CompileResponse) ([]*v1alpha.ComputeTable, error) {
 	subLogger := log.Ctx(ctx).With().Str("method", "materializationManager.getMaterializationTables").Logger()
 

wren/internal/interface.go

@@ -9,6 +9,7 @@ import (
 	v1alpha "github.com/kaskada-ai/kaskada/gen/proto/go/kaskada/kaskada/v1alpha"
 	"github.com/kaskada-ai/kaskada/wren/ent"
 	"github.com/kaskada-ai/kaskada/wren/ent/kaskadafile"
+	"github.com/kaskada-ai/kaskada/wren/ent/materialization"
 	"github.com/kaskada-ai/kaskada/wren/ent/predicate"
 	"github.com/kaskada-ai/kaskada/wren/ent/schema"
 	"github.com/kaskada-ai/kaskada/wren/property"
@@ -80,10 +81,11 @@ type MaterializationClient interface {
 	CreateMaterialization(ctx context.Context, owner *ent.Owner, newMaterialization *ent.Materialization, dependencies []*ent.MaterializationDependency) (*ent.Materialization, error)
 	DeleteMaterialization(ctx context.Context, owner *ent.Owner, view *ent.Materialization) error
 	GetAllMaterializations(ctx context.Context, owner *ent.Owner) ([]*ent.Materialization, error)
+	GetAllMaterializationsBySourceType(ctx context.Context, sourceType materialization.SourceType) ([]*ent.Materialization, error)
 	GetMaterialization(ctx context.Context, owner *ent.Owner, id uuid.UUID) (*ent.Materialization, error)
 	GetMaterializationByName(ctx context.Context, owner *ent.Owner, name string) (*ent.Materialization, error)
-	GetMaterializationsFromNames(ctx context.Context, owner *ent.Owner, names []string) (map[string]*ent.Materialization, error)
 	GetMaterializationsWithDependency(ctx context.Context, owner *ent.Owner, name string, dependencyType schema.DependencyType) ([]*ent.Materialization, error)
+	GetMaterializationsBySourceType(ctx context.Context, owner *ent.Owner, sourceType materialization.SourceType) ([]*ent.Materialization, error)
 	ListMaterializations(ctx context.Context, owner *ent.Owner, searchTerm string, pageSize int, offset int) ([]*ent.Materialization, error)
 	UpdateDataVersion(ctx context.Context, materialization *ent.Materialization, newDataVersion int64) (*ent.Materialization, error)
 	IncrementVersion(ctx context.Context, materialization *ent.Materialization) (*ent.Materialization, error)

wren/internal/materialization_client.go

@@ -10,7 +10,6 @@ import (
 	"github.com/kaskada-ai/kaskada/wren/ent"
 	"github.com/kaskada-ai/kaskada/wren/ent/materialization"
 	"github.com/kaskada-ai/kaskada/wren/ent/materializationdependency"
-	"github.com/kaskada-ai/kaskada/wren/ent/predicate"
 	"github.com/kaskada-ai/kaskada/wren/ent/schema"
 )
 
@@ -57,6 +56,7 @@ func (c *materializationClient) CreateMaterialization(ctx context.Context, owner
 		SetAnalysis(newMaterialization.Analysis).
 		SetDataVersionID(newMaterialization.DataVersionID).
 		SetVersion(newMaterialization.Version).
+		SetSourceType(newMaterialization.SourceType).
 		Save(ctx)
 
 	if err != nil {
@@ -155,31 +155,6 @@ func (c *materializationClient) GetMaterializationByName(ctx context.Context, ow
 	return materialization, nil
 }
 
-func (c *materializationClient) GetMaterializationsFromNames(ctx context.Context, owner *ent.Owner, names []string) (map[string]*ent.Materialization, error) {
-	subLogger := log.Ctx(ctx).With().
-		Str("method", "materializationClient.GetMaterializationsFromNames").
-		Logger()
-
-	predicates := make([]predicate.Materialization, 0, len(names))
-
-	for _, name := range names {
-		predicates = append(predicates, materialization.Name(name))
-	}
-
-	materializations, err := owner.QueryMaterializations().Where(materialization.Or(predicates...)).All(ctx)
-	if err != nil {
-		subLogger.Error().Err(err).Msg("issue getting materializations")
-		return nil, err
-	}
-
-	materializationMap := map[string]*ent.Materialization{}
-
-	for _, materialization := range materializations {
-		materializationMap[materialization.Name] = materialization
-	}
-
-	return materializationMap, nil
-}
 
 func (c *materializationClient) GetMaterializationsWithDependency(ctx context.Context, owner *ent.Owner, name string, dependencyType schema.DependencyType) ([]*ent.Materialization, error) {
 	subLogger := log.Ctx(ctx).With().
@@ -206,6 +181,34 @@ func (c *materializationClient) GetMaterializationsWithDependency(ctx context.Co
 	return materializations, nil
 }
 
+func (c *materializationClient) GetMaterializationsBySourceType(ctx context.Context, owner *ent.Owner, sourceType materialization.SourceType) ([]*ent.Materialization, error) {
+	subLogger := log.Ctx(ctx).With().
+		Str("method", "materializationClient.GetMaterializationsBySourceType").
+		Str("source_type", string(sourceType)).
+		Logger()
+
+	materializations, err := owner.QueryMaterializations().Where(materialization.SourceTypeEQ(sourceType)).WithOwner().All(ctx)
+	if err != nil {
+		subLogger.Error().Err(err).Msg("issue listing materializations")
+		return nil, err
+	}
+	return materializations, nil
+}
+
+func (c *materializationClient) GetAllMaterializationsBySourceType(ctx context.Context, sourceType materialization.SourceType) ([]*ent.Materialization, error) {
+	subLogger := log.Ctx(ctx).With().
+		Str("method", "materializationClient.GetAllMaterializationsBySourceType").
+		Str("source_type", string(sourceType)).
+		Logger()
+
+	materializations, err := c.entClient.Materialization.Query().Where(materialization.SourceTypeEQ(sourceType)).All(ctx)
+	if err != nil {
+		subLogger.Error().Err(err).Msg("issue listing materializations")
+		return nil, err
+	}
+	return materializations, nil
+}
+
 func (c *materializationClient) ListMaterializations(ctx context.Context, owner *ent.Owner, searchTerm string, pageSize int, offset int) ([]*ent.Materialization, error) {
 	subLogger := log.Ctx(ctx).With().
 		Str("method", "materializationClient.ListMaterializations").

wren/main.go

@@ -351,6 +351,18 @@ func main() {
 		return nil
 	})
 
+	// peridocally reconcile materializations to ensure the ones that are supposed to be running are running
+	g.Go(func() error {
+		for {
+			time.Sleep(5 * time.Second)
+
+			err := materializationManager.ReconcileMaterializations(ctx)
+			if err != nil {
+				return err
+			}
+		}
+	})
+
 	// wait until shutdown signal occurs
 	select {
 	case <-interrupt: