add paging support to GetAll (#1601)

* add paging support to GetAll

* fix import

authorize/run.go

@@ -91,7 +91,7 @@ func (a *Authorize) runDataTypeSyncer(ctx context.Context, typeURL string) error
 	ctx, span := trace.StartSpan(ctx, "authorize.dataBrokerClient.GetAll")
 	backoff := backoff.NewExponentialBackOff()
 	for {
-		res, err := a.state.Load().dataBrokerClient.GetAll(ctx, &databroker.GetAllRequest{
+		res, err := databroker.GetAllPages(ctx, a.state.Load().dataBrokerClient, &databroker.GetAllRequest{
 			Type: typeURL,
 		})
 		if err != nil {

internal/databroker/config.go

@@ -17,6 +17,8 @@ var (
 	DefaultBTreeDegree = 8
 	// DefaultStorageType is the default storage type that Server use
 	DefaultStorageType = "memory"
+	// DefaultGetAllPageSize is the default page size for GetAll calls.
+	DefaultGetAllPageSize = 50
 )
 
 type serverConfig struct {
@@ -28,6 +30,7 @@ type serverConfig struct {
 	storageCAFile           string
 	storageCertSkipVerify   bool
 	storageCertificate      *tls.Certificate
+	getAllPageSize          int
 }
 
 func newServerConfig(options ...ServerOption) *serverConfig {
@@ -35,6 +38,7 @@ func newServerConfig(options ...ServerOption) *serverConfig {
 	WithDeletePermanentlyAfter(DefaultDeletePermanentlyAfter)(cfg)
 	WithBTreeDegree(DefaultBTreeDegree)(cfg)
 	WithStorageType(DefaultStorageType)(cfg)
+	WithGetAllPageSize(DefaultGetAllPageSize)(cfg)
 	for _, option := range options {
 		option(cfg)
 	}
@@ -60,6 +64,13 @@ func WithDeletePermanentlyAfter(dur time.Duration) ServerOption {
 	}
 }
 
+// WithGetAllPageSize sets the page size for GetAll calls.
+func WithGetAllPageSize(pageSize int) ServerOption {
+	return func(cfg *serverConfig) {
+		cfg.getAllPageSize = pageSize
+	}
+}
+
 // WithSharedKey sets the secret in the config.
 func WithSharedKey(sharedKey string) ServerOption {
 	return func(cfg *serverConfig) {

internal/databroker/server.go

@@ -181,7 +181,7 @@ func (srv *Server) Get(ctx context.Context, req *databroker.GetRequest) (*databr
 	return &databroker.GetResponse{Record: record}, nil
 }
 
-// GetAll gets all the records from the in-memory list.
+// GetAll gets all the records from the backend.
 func (srv *Server) GetAll(ctx context.Context, req *databroker.GetAllRequest) (*databroker.GetAllResponse, error) {
 	_, span := trace.StartSpan(ctx, "databroker.grpc.GetAll")
 	defer span.End()
@@ -199,25 +199,40 @@ func (srv *Server) GetAll(ctx context.Context, req *databroker.GetAllRequest) (*
 		return nil, err
 	}
 
-	if len(all) == 0 {
+	// sort by record version
-		return &databroker.GetAllResponse{ServerVersion: version}, nil
+	sort.Slice(all, func(i, j int) bool {
-	}
+		return all[i].Version < all[j].Version
+	})
 
 	var recordVersion string
 	records := make([]*databroker.Record, 0, len(all))
 	for _, record := range all {
-		if record.GetVersion() > recordVersion {
+		// skip previous page records
-			recordVersion = record.GetVersion()
+		if record.GetVersion() <= req.PageToken {
+			continue
 		}
+
+		recordVersion = record.GetVersion()
 		if record.DeletedAt == nil {
 			records = append(records, record)
 		}
+
+		// stop when we've hit the page size
+		if len(records) >= srv.cfg.getAllPageSize {
+			break
+		}
+	}
+
+	nextPageToken := recordVersion
+	if len(records) < srv.cfg.getAllPageSize {
+		nextPageToken = ""
 	}
 
 	return &databroker.GetAllResponse{
 		ServerVersion: version,
 		RecordVersion: recordVersion,
 		Records:       records,
+		NextPageToken: nextPageToken,
 	}, nil
 }
 

internal/databroker/server_test.go

@@ -2,6 +2,7 @@ package databroker
 
 import (
 	"context"
+	"fmt"
 	"testing"
 
 	"github.com/golang/protobuf/ptypes"
@@ -11,6 +12,7 @@ import (
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/types/known/anypb"
+	"google.golang.org/protobuf/types/known/wrapperspb"
 
 	"github.com/pomerium/pomerium/internal/log"
 	"github.com/pomerium/pomerium/internal/signal"
@@ -124,7 +126,9 @@ func TestServer_Get(t *testing.T) {
 }
 
 func TestServer_GetAll(t *testing.T) {
-	cfg := newServerConfig()
+	cfg := newServerConfig(
+		WithGetAllPageSize(5),
+	)
 	t.Run("ignore deleted", func(t *testing.T) {
 		srv := newServer(cfg)
 
@@ -148,4 +152,33 @@ func TestServer_GetAll(t *testing.T) {
 		assert.NoError(t, err)
 		assert.Len(t, res.GetRecords(), 0)
 	})
+	t.Run("paging", func(t *testing.T) {
+		srv := newServer(cfg)
+
+		any, err := anypb.New(wrapperspb.String("TEST"))
+		assert.NoError(t, err)
+
+		for i := 0; i < 7; i++ {
+			srv.Set(context.Background(), &databroker.SetRequest{
+				Type: any.TypeUrl,
+				Id:   fmt.Sprint(i),
+				Data: any,
+			})
+		}
+
+		res, err := srv.GetAll(context.Background(), &databroker.GetAllRequest{
+			Type: any.TypeUrl,
+		})
+		assert.NoError(t, err)
+		assert.Len(t, res.GetRecords(), 5)
+		assert.Equal(t, res.GetNextPageToken(), "000000000005")
+
+		res, err = srv.GetAll(context.Background(), &databroker.GetAllRequest{
+			Type:      any.TypeUrl,
+			PageToken: res.GetNextPageToken(),
+		})
+		assert.NoError(t, err)
+		assert.Len(t, res.GetRecords(), 2)
+		assert.Equal(t, res.GetNextPageToken(), "")
+	})
 }

internal/identity/manager/manager.go

@@ -529,7 +529,7 @@ func (mgr *Manager) initDirectoryUsers(ctx context.Context) error {
 		return err
 	}
 
-	res, err := mgr.cfg.Load().dataBrokerClient.GetAll(ctx, &databroker.GetAllRequest{
+	res, err := databroker.GetAllPages(ctx, mgr.cfg.Load().dataBrokerClient, &databroker.GetAllRequest{
 		Type: any.GetTypeUrl(),
 	})
 	if err != nil {
@@ -598,7 +598,7 @@ func (mgr *Manager) initDirectoryGroups(ctx context.Context) error {
 		return err
 	}
 
-	res, err := mgr.cfg.Load().dataBrokerClient.GetAll(ctx, &databroker.GetAllRequest{
+	res, err := databroker.GetAllPages(ctx, mgr.cfg.Load().dataBrokerClient, &databroker.GetAllRequest{
 		Type: any.GetTypeUrl(),
 	})
 	if err != nil {

pkg/grpc/databroker/databroker.go

@@ -1,7 +1,10 @@
 // Package databroker contains databroker protobuf definitions.
 package databroker
 
-import "strings"
+import (
+	"context"
+	"strings"
+)
 
 // GetUserID gets the databroker user id from a provider user id.
 func GetUserID(provider, providerUserID string) string {
@@ -30,3 +33,28 @@ func ApplyOffsetAndLimit(all []*Record, offset, limit int) (records []*Record, t
 	}
 	return records, len(all)
 }
+
+// GetAllPages calls GetAll for all pages of data.
+func GetAllPages(ctx context.Context, client DataBrokerServiceClient, in *GetAllRequest) (*GetAllResponse, error) {
+	var res GetAllResponse
+	var pageToken string
+	for {
+		nxt, err := client.GetAll(ctx, &GetAllRequest{
+			Type:      in.GetType(),
+			PageToken: pageToken,
+		})
+		if err != nil {
+			return nil, err
+		}
+
+		res.ServerVersion = nxt.ServerVersion
+		res.RecordVersion = nxt.RecordVersion
+		res.Records = append(res.Records, nxt.Records...)
+
+		if nxt.NextPageToken == "" {
+			break
+		}
+		pageToken = nxt.NextPageToken
+	}
+	return &res, nil
+}

pkg/grpc/databroker/databroker.pb.go

@@ -336,7 +336,8 @@ type GetAllRequest struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Type string `protobuf:"bytes,1,opt,name=type,proto3" json:"type,omitempty"`
+	Type      string `protobuf:"bytes,1,opt,name=type,proto3" json:"type,omitempty"`
+	PageToken string `protobuf:"bytes,2,opt,name=page_token,json=pageToken,proto3" json:"page_token,omitempty"`
 }
 
 func (x *GetAllRequest) Reset() {
@@ -378,6 +379,13 @@ func (x *GetAllRequest) GetType() string {
 	return ""
 }
 
+func (x *GetAllRequest) GetPageToken() string {
+	if x != nil {
+		return x.PageToken
+	}
+	return ""
+}
+
 type GetAllResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -386,6 +394,7 @@ type GetAllResponse struct {
 	Records       []*Record `protobuf:"bytes,1,rep,name=records,proto3" json:"records,omitempty"`
 	ServerVersion string    `protobuf:"bytes,2,opt,name=server_version,json=serverVersion,proto3" json:"server_version,omitempty"`
 	RecordVersion string    `protobuf:"bytes,3,opt,name=record_version,json=recordVersion,proto3" json:"record_version,omitempty"`
+	NextPageToken string    `protobuf:"bytes,4,opt,name=next_page_token,json=nextPageToken,proto3" json:"next_page_token,omitempty"`
 }
 
 func (x *GetAllResponse) Reset() {
@@ -441,6 +450,13 @@ func (x *GetAllResponse) GetRecordVersion() string {
 	return ""
 }
 
+func (x *GetAllResponse) GetNextPageToken() string {
+	if x != nil {
+		return x.NextPageToken
+	}
+	return ""
+}
+
 type QueryRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -891,95 +907,99 @@ var file_databroker_proto_rawDesc = []byte{
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+	0x6d, 0x2f, 0x70, 0x6b, 0x67, 0x2f, 0x67, 0x72, 0x70, 0x63, 0x2f, 0x64, 0x61, 0x74, 0x61, 0x62,
-	0x6d, 0x2f, 0x70, 0x6f, 0x6d, 0x65, 0x72, 0x69, 0x75, 0x6d, 0x2f, 0x70, 0x6b, 0x67, 0x2f, 0x67,
+	0x72, 0x6f, 0x6b, 0x65, 0x72, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
-	0x72, 0x70, 0x63, 0x2f, 0x64, 0x61, 0x74, 0x61, 0x62, 0x72, 0x6f, 0x6b, 0x65, 0x72, 0x62, 0x06,
-	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

pkg/grpc/databroker/databroker.proto

@@ -7,9 +7,7 @@ import "google/protobuf/any.proto";
 import "google/protobuf/empty.proto";
 import "google/protobuf/timestamp.proto";
 
-message ServerVersion {
+message ServerVersion { string version = 1; }
-  string version = 1;
-}
 
 message Record {
   string version = 1;
@@ -32,11 +30,15 @@ message GetRequest {
 }
 message GetResponse { Record record = 1; }
 
-message GetAllRequest { string type = 1; }
+message GetAllRequest {
+  string type = 1;
+  string page_token = 2;
+}
 message GetAllResponse {
   repeated Record records = 1;
   string server_version = 2;
   string record_version = 3;
+  string next_page_token = 4;
 }
 
 message QueryRequest {

pkg/grpc/databroker/databroker_test.go

@@ -1,9 +1,18 @@
 package databroker
 
 import (
+	"context"
+	"net"
+	"strconv"
 	"testing"
+	"time"
 
 	"github.com/stretchr/testify/assert"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+	"google.golang.org/protobuf/types/known/anypb"
+	"google.golang.org/protobuf/types/known/wrapperspb"
 )
 
 func TestApplyOffsetAndLimit(t *testing.T) {
@@ -44,3 +53,104 @@ func TestApplyOffsetAndLimit(t *testing.T) {
 		})
 	}
 }
+
+type mockServer struct {
+	DataBrokerServiceServer
+
+	getAll func(context.Context, *GetAllRequest) (*GetAllResponse, error)
+}
+
+func (m *mockServer) GetAll(ctx context.Context, req *GetAllRequest) (*GetAllResponse, error) {
+	return m.getAll(ctx, req)
+}
+
+func TestGetAllPages(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
+	defer cancel()
+
+	t.Run("resource exhausted", func(t *testing.T) {
+		li, err := net.Listen("tcp", "127.0.0.1:0")
+		if !assert.NoError(t, err) {
+			return
+		}
+		defer li.Close()
+
+		m := &mockServer{
+			getAll: func(ctx context.Context, req *GetAllRequest) (*GetAllResponse, error) {
+				any, _ := anypb.New(wrapperspb.String("TEST"))
+				var records []*Record
+				for i := 0; i < 1000000; i++ {
+					records = append(records, &Record{
+						Type: req.GetType(),
+						Data: any,
+					})
+				}
+				return &GetAllResponse{Records: records}, nil
+			},
+		}
+
+		srv := grpc.NewServer()
+		RegisterDataBrokerServiceServer(srv, m)
+		go srv.Serve(li)
+
+		cc, err := grpc.Dial(li.Addr().String(), grpc.WithInsecure())
+		if !assert.NoError(t, err) {
+			return
+		}
+		defer cc.Close()
+
+		c := NewDataBrokerServiceClient(cc)
+
+		res, err := GetAllPages(ctx, c, &GetAllRequest{
+			Type: "TEST",
+		})
+		assert.Error(t, err)
+		assert.Equal(t, codes.ResourceExhausted, status.Code(err))
+		assert.Nil(t, res)
+	})
+	t.Run("with paging", func(t *testing.T) {
+		li, err := net.Listen("tcp", "127.0.0.1:0")
+		if !assert.NoError(t, err) {
+			return
+		}
+		defer li.Close()
+
+		m := &mockServer{
+			getAll: func(ctx context.Context, req *GetAllRequest) (*GetAllResponse, error) {
+				pageToken, _ := strconv.Atoi(req.GetPageToken())
+
+				any, _ := anypb.New(wrapperspb.String("TEST"))
+				var records []*Record
+				for i := pageToken; i < pageToken+10000 && i < 1000000; i++ {
+					records = append(records, &Record{
+						Type: req.GetType(),
+						Data: any,
+					})
+				}
+				if len(records) == 0 {
+					return &GetAllResponse{}, nil
+				}
+				return &GetAllResponse{Records: records, NextPageToken: strconv.Itoa(pageToken + 10000)}, nil
+			},
+		}
+
+		srv := grpc.NewServer()
+		RegisterDataBrokerServiceServer(srv, m)
+		go srv.Serve(li)
+
+		cc, err := grpc.Dial(li.Addr().String(), grpc.WithInsecure())
+		if !assert.NoError(t, err) {
+			return
+		}
+		defer cc.Close()
+
+		c := NewDataBrokerServiceClient(cc)
+
+		res, err := GetAllPages(ctx, c, &GetAllRequest{
+			Type: "TEST",
+		})
+		assert.NoError(t, err)
+		assert.NotEqual(t, codes.ResourceExhausted, status.Code(err))
+		assert.Len(t, res.GetRecords(), 1000000)
+	})
+}