graph concurrent share listing

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

services/graph/pkg/service/v0/base.go

@@ -17,6 +17,7 @@ import (
 	storageprovider "github.com/cs3org/go-cs3apis/cs3/storage/provider/v1beta1"
 	types "github.com/cs3org/go-cs3apis/cs3/types/v1beta1"
 	libregraph "github.com/owncloud/libre-graph-api-go"
+	"golang.org/x/sync/errgroup"
 	"google.golang.org/protobuf/types/known/fieldmaskpb"
 
 	"github.com/cs3org/reva/v2/pkg/rgrpc/todo/pool"
@@ -350,77 +351,204 @@ func (g BaseGraphService) listPublicShares(ctx context.Context, filters []*link.
 }
 
 func (g BaseGraphService) cs3UserSharesToDriveItems(ctx context.Context, shares []*collaboration.Share, driveItems driveItemsByResourceID) (driveItemsByResourceID, error) {
-	for _, s := range shares {
-		g.logger.Debug().Interface("CS3 UserShare", s).Msg("Got Share")
-		resIDStr := storagespace.FormatResourceID(s.ResourceId)
-		item, ok := driveItems[resIDStr]
-		if !ok {
-			itemptr, err := g.getDriveItem(ctx, &storageprovider.Reference{ResourceId: s.ResourceId})
-			if err != nil {
-				g.logger.Debug().Err(err).Interface("Share", s.ResourceId).Msg("could not stat share, skipping")
-				continue
-			}
-			item = *itemptr
-		}
+	errg, ctx := errgroup.WithContext(ctx)
 
-		var condition string
-		switch {
-		case item.Root != nil:
-			condition = unifiedrole.UnifiedRoleConditionDrive
-		case item.Folder != nil:
-			condition = unifiedrole.UnifiedRoleConditionFolder
-		case item.File != nil:
-			condition = unifiedrole.UnifiedRoleConditionFile
-		}
-		perm, err := g.cs3UserShareToPermission(ctx, s, condition)
-
-		var errcode errorcode.Error
-		switch {
-		case errors.As(err, &errcode) && errcode.GetCode() == errorcode.ItemNotFound:
-			// The Grantee couldn't be found (user/group does not exist anymore)
-			continue
-		case err != nil:
-			return driveItems, err
-		}
-		item.Permissions = append(item.Permissions, *perm)
-		driveItems[resIDStr] = item
+	// group shares by resource id
+	sharesByResource := make(map[string][]*collaboration.Share)
+	for _, share := range shares {
+		sharesByResource[share.GetResourceId().String()] = append(sharesByResource[share.GetResourceId().String()], share)
 	}
+
+	type resourceShares struct {
+		ResourceID *storageprovider.ResourceId
+		Shares     []*collaboration.Share
+	}
+
+	work := make(chan resourceShares, len(shares))
+	results := make(chan *libregraph.DriveItem, len(shares))
+
+	// Distribute work
+	errg.Go(func() error {
+		defer close(work)
+
+		for _, shares := range sharesByResource {
+			select {
+			case work <- resourceShares{ResourceID: shares[0].GetResourceId(), Shares: shares}:
+			case <-ctx.Done():
+				return ctx.Err()
+			}
+		}
+		return nil
+	})
+
+	// Spawn workers that'll concurrently work the queue
+	numWorkers := g.config.MaxConcurrency
+	if len(sharesByResource) < numWorkers {
+		numWorkers = len(sharesByResource)
+	}
+	for i := 0; i < numWorkers; i++ {
+		errg.Go(func() error {
+			for sharesByResource := range work {
+				resIDStr := storagespace.FormatResourceID(sharesByResource.ResourceID)
+				// check if we already have the drive item in the map
+				item, ok := driveItems[resIDStr]
+				if !ok {
+					itemptr, err := g.getDriveItem(ctx, &storageprovider.Reference{ResourceId: sharesByResource.ResourceID})
+					if err != nil {
+						g.logger.Debug().Err(err).Str("storage", sharesByResource.ResourceID.StorageId).Str("space", sharesByResource.ResourceID.SpaceId).Str("node", sharesByResource.ResourceID.OpaqueId).Msg("could not stat resource, skipping")
+						continue
+					}
+					item = *itemptr
+				}
+
+				var condition string
+				switch {
+				case item.Root != nil:
+					condition = unifiedrole.UnifiedRoleConditionDrive
+				case item.Folder != nil:
+					condition = unifiedrole.UnifiedRoleConditionFolder
+				case item.File != nil:
+					condition = unifiedrole.UnifiedRoleConditionFile
+				}
+				for _, share := range sharesByResource.Shares {
+					perm, err := g.cs3UserShareToPermission(ctx, share, condition)
+					var errcode errorcode.Error
+					switch {
+					case errors.As(err, &errcode) && errcode.GetCode() == errorcode.ItemNotFound:
+						// The Grantee couldn't be found (user/group does not exist anymore)
+						continue
+					case err != nil:
+						return err
+					}
+					item.Permissions = append(item.Permissions, *perm)
+				}
+				if len(item.Permissions) == 0 {
+					continue
+				}
+
+				select {
+				case results <- &item:
+				case <-ctx.Done():
+					return ctx.Err()
+				}
+			}
+			return nil
+		})
+	}
+	// Wait for things to settle down, then close results chan
+	go func() {
+		_ = errg.Wait() // error is checked later
+		close(results)
+	}()
+
+	for item := range results {
+		driveItems[item.GetId()] = *item
+	}
+
+	if err := errg.Wait(); err != nil {
+		return nil, err
+	}
+
 	return driveItems, nil
 }
+
 func (g BaseGraphService) cs3OCMSharesToDriveItems(ctx context.Context, shares []*ocm.Share, driveItems driveItemsByResourceID) (driveItemsByResourceID, error) {
-	for _, s := range shares {
-		g.logger.Debug().Interface("CS3 OCMShare", s).Msg("Got Share")
-		resIDStr := storagespace.FormatResourceID(s.ResourceId)
-		item, ok := driveItems[resIDStr]
-		if !ok {
-			itemptr, err := g.getDriveItem(ctx, &storageprovider.Reference{ResourceId: s.ResourceId})
-			if err != nil {
-				g.logger.Debug().Err(err).Interface("Share", s.ResourceId).Msg("could not stat ocm share, skipping")
-				continue
-			}
-			item = *itemptr
-		}
+	errg, ctx := errgroup.WithContext(ctx)
 
-		var condition string
-		switch {
-		case item.Folder != nil:
-			condition = unifiedrole.UnifiedRoleConditionFolderFederatedUser
-		case item.File != nil:
-			condition = unifiedrole.UnifiedRoleConditionFileFederatedUser
-		}
-		perm, err := g.cs3OCMShareToPermission(ctx, s, condition)
-
-		var errcode errorcode.Error
-		switch {
-		case errors.As(err, &errcode) && errcode.GetCode() == errorcode.ItemNotFound:
-			// The Grantee couldn't be found (user/group does not exist anymore)
-			continue
-		case err != nil:
-			return driveItems, err
-		}
-		item.Permissions = append(item.Permissions, *perm)
-		driveItems[resIDStr] = item
+	// group shares by resource id
+	sharesByResource := make(map[string][]*ocm.Share)
+	for _, share := range shares {
+		sharesByResource[share.GetResourceId().String()] = append(sharesByResource[share.GetResourceId().String()], share)
 	}
+
+	type resourceShares struct {
+		ResourceID *storageprovider.ResourceId
+		Shares     []*ocm.Share
+	}
+
+	work := make(chan resourceShares, len(shares))
+	results := make(chan *libregraph.DriveItem, len(shares))
+
+	// Distribute work
+	errg.Go(func() error {
+		defer close(work)
+
+		for _, shares := range sharesByResource {
+			select {
+			case work <- resourceShares{ResourceID: shares[0].GetResourceId(), Shares: shares}:
+			case <-ctx.Done():
+				return ctx.Err()
+			}
+		}
+		return nil
+	})
+
+	// Spawn workers that'll concurrently work the queue
+	numWorkers := g.config.MaxConcurrency
+	if len(sharesByResource) < numWorkers {
+		numWorkers = len(sharesByResource)
+	}
+	for i := 0; i < numWorkers; i++ {
+		errg.Go(func() error {
+			for sharesByResource := range work {
+				resIDStr := storagespace.FormatResourceID(sharesByResource.ResourceID)
+				item, ok := driveItems[resIDStr]
+				if !ok {
+					itemptr, err := g.getDriveItem(ctx, &storageprovider.Reference{ResourceId: sharesByResource.ResourceID})
+					if err != nil {
+						g.logger.Debug().Err(err).Interface("Share", sharesByResource.ResourceID).Msg("could not stat ocm share, skipping")
+						continue
+					}
+					item = *itemptr
+				}
+
+				var condition string
+				switch {
+				case item.Folder != nil:
+					condition = unifiedrole.UnifiedRoleConditionFolderFederatedUser
+				case item.File != nil:
+					condition = unifiedrole.UnifiedRoleConditionFileFederatedUser
+				}
+				for _, share := range sharesByResource.Shares {
+					perm, err := g.cs3OCMShareToPermission(ctx, share, condition)
+
+					var errcode errorcode.Error
+					switch {
+					case errors.As(err, &errcode) && errcode.GetCode() == errorcode.ItemNotFound:
+						// The Grantee couldn't be found (user/group does not exist anymore)
+						continue
+					case err != nil:
+						return err
+					}
+					item.Permissions = append(item.Permissions, *perm)
+				}
+				if len(item.Permissions) == 0 {
+					continue
+				}
+
+				select {
+				case results <- &item:
+				case <-ctx.Done():
+					return ctx.Err()
+				}
+			}
+			return nil
+		})
+	}
+	// Wait for things to settle down, then close results chan
+	go func() {
+		_ = errg.Wait() // error is checked later
+		close(results)
+	}()
+
+	for item := range results {
+		driveItems[item.GetId()] = *item
+	}
+
+	if err := errg.Wait(); err != nil {
+		return nil, err
+	}
+
 	return driveItems, nil
 }
 
@@ -593,26 +721,89 @@ func (g BaseGraphService) cs3OCMShareToPermission(ctx context.Context, share *oc
 }
 
 func (g BaseGraphService) cs3PublicSharesToDriveItems(ctx context.Context, shares []*link.PublicShare, driveItems driveItemsByResourceID) (driveItemsByResourceID, error) {
-	for _, s := range shares {
-		g.logger.Debug().Interface("CS3 PublicShare", s).Msg("Got Share")
-		resIDStr := storagespace.FormatResourceID(s.ResourceId)
-		item, ok := driveItems[resIDStr]
-		if !ok {
-			itemptr, err := g.getDriveItem(ctx, &storageprovider.Reference{ResourceId: s.ResourceId})
-			if err != nil {
-				g.logger.Debug().Err(err).Interface("Share", s.ResourceId).Msg("could not stat share, skipping")
-				continue
-			}
-			item = *itemptr
-		}
-		perm, err := g.libreGraphPermissionFromCS3PublicShare(s)
-		if err != nil {
-			g.logger.Error().Err(err).Interface("Link", s.ResourceId).Msg("could not convert link to libregraph")
-			return driveItems, err
-		}
+	errg, ctx := errgroup.WithContext(ctx)
 
-		item.Permissions = append(item.Permissions, *perm)
-		driveItems[resIDStr] = item
+	// group shares by resource id
+	sharesByResource := make(map[string][]*link.PublicShare)
+	for _, share := range shares {
+		sharesByResource[share.GetResourceId().String()] = append(sharesByResource[share.GetResourceId().String()], share)
+	}
+
+	type resourceShares struct {
+		ResourceID *storageprovider.ResourceId
+		Shares     []*link.PublicShare
+	}
+
+	work := make(chan resourceShares, len(shares))
+	results := make(chan *libregraph.DriveItem, len(shares))
+
+	// Distribute work
+	errg.Go(func() error {
+		defer close(work)
+
+		for _, shares := range sharesByResource {
+			select {
+			case work <- resourceShares{ResourceID: shares[0].GetResourceId(), Shares: shares}:
+			case <-ctx.Done():
+				return ctx.Err()
+			}
+		}
+		return nil
+	})
+
+	// Spawn workers that'll concurrently work the queue
+	numWorkers := g.config.MaxConcurrency
+	if len(sharesByResource) < numWorkers {
+		numWorkers = len(sharesByResource)
+	}
+	for i := 0; i < numWorkers; i++ {
+		errg.Go(func() error {
+			for sharesByResource := range work {
+				resIDStr := storagespace.FormatResourceID(sharesByResource.ResourceID)
+				item, ok := driveItems[resIDStr]
+				if !ok {
+					itemptr, err := g.getDriveItem(ctx, &storageprovider.Reference{ResourceId: sharesByResource.ResourceID})
+					if err != nil {
+						g.logger.Debug().Err(err).Interface("Share", sharesByResource.ResourceID).Msg("could not stat share, skipping")
+						continue
+					}
+					item = *itemptr
+				}
+				for _, share := range sharesByResource.Shares {
+
+					perm, err := g.libreGraphPermissionFromCS3PublicShare(share)
+					if err != nil {
+						g.logger.Error().Err(err).Interface("Link", sharesByResource.ResourceID).Msg("could not convert link to libregraph")
+						return err
+					}
+
+					item.Permissions = append(item.Permissions, *perm)
+				}
+				if len(item.Permissions) == 0 {
+					continue
+				}
+
+				select {
+				case results <- &item:
+				case <-ctx.Done():
+					return ctx.Err()
+				}
+			}
+			return nil
+		})
+	}
+	// Wait for things to settle down, then close results chan
+	go func() {
+		_ = errg.Wait() // error is checked later
+		close(results)
+	}()
+
+	for item := range results {
+		driveItems[item.GetId()] = *item
+	}
+
+	if err := errg.Wait(); err != nil {
+		return nil, err
 	}
 
 	return driveItems, nil