chore: refactor Watch API flags

e2e/go.mod

@@ -43,6 +43,7 @@ require (
 	github.com/creasty/defaults v1.8.0 // indirect
 	github.com/dave/jennifer v1.7.1 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/emirpasic/gods v1.18.1 // indirect
 	github.com/envoyproxy/protoc-gen-validate v1.3.0 // indirect
 	github.com/fatih/structtag v1.2.0 // indirect
@@ -60,6 +61,7 @@ require (
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/onsi/ginkgo/v2 v2.26.0 // indirect
 	github.com/onsi/gomega v1.38.2 // indirect
+	github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 // indirect
 	github.com/planetscale/vtprotobuf v0.6.1-0.20240917153116-6f2963f01587 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/rs/zerolog v1.34.0 // indirect

e2e/go.sum

@@ -89,7 +89,6 @@ github.com/brianvoe/gofakeit/v6 v6.28.0 h1:Xib46XXuQfmlLS2EXRuJpqcw8St6qSZz75OUo
 github.com/brianvoe/gofakeit/v6 v6.28.0/go.mod h1:Xj58BMSnFqcn/fAQeSK+/PLtC5kSb7FJIq4JyGa8vEs=
 github.com/ccoveille/go-safecast/v2 v2.0.0 h1:+5eyITXAUj3wMjad6cRVJKGnC7vDS55zk0INzJagub0=
 github.com/ccoveille/go-safecast/v2 v2.0.0/go.mod h1:JIYA4CAR33blIDuE6fSwCp2sz1oOBahXnvmdBhOAABs=
-github.com/cenkalti/backoff v2.2.1+incompatible h1:tNowT99t7UNflLxfYYSlKYsBpXdEet03Pg2g16Swow4=
 github.com/cenkalti/backoff/v5 v5.0.3 h1:ZN+IMa753KfX5hd8vVaMixjnqRZ3y8CuJKRKj1xcsSM=
 github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
@@ -116,6 +115,8 @@ github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dlmiddlecote/sqlstats v1.0.2 h1:gSU11YN23D/iY50A2zVYwgXgy072khatTsIW6UPjUtI=
 github.com/dlmiddlecote/sqlstats v1.0.2/go.mod h1:0CWaIh/Th+z2aI6Q9Jpfg/o21zmGxWhbByHgQSCUQvY=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/ecordell/optgen v0.2.3 h1:DXuT9cYRInIJEh/dIOuLPgi7gYXrlfjzV/KsD80CXLE=
 github.com/ecordell/optgen v0.2.3/go.mod h1:pqjipFkG6vAwvKgjPGWaZyqmtWAqdb2w6EcTnP+kgqQ=
 github.com/emirpasic/gods v1.18.1 h1:FXtiHYKDGKCW2KzwZKx0iC0PQmdlorYgdFG9jPXJ1Bc=
@@ -235,6 +236,8 @@ github.com/onsi/ginkgo/v2 v2.26.0/go.mod h1:qhEywmzWTBUY88kfO0BRvX4py7scov9yR+Az
 github.com/onsi/gomega v1.38.2 h1:eZCjf2xjZAqe+LeWvKb5weQ+NcPwX84kqJ0cZNxok2A=
 github.com/onsi/gomega v1.38.2/go.mod h1:W2MJcYxRGV63b418Ai34Ud0hEdTVXq9NW9+Sx6uXf3k=
 github.com/opentracing/opentracing-go v1.1.0/go.mod h1:UkNAQd3GIcIGf0SeVgPpRdFStlNbqXla1AfSYxPUl2o=
+github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 h1:onHthvaw9LFnH4t2DcNVpwGmV9E1BkGknEliJkfwQj0=
+github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58/go.mod h1:DXv8WO4yhMYhSNPKjeNKa5WY9YCIEBRbNzFFPJbWO6Y=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/planetscale/vtprotobuf v0.6.1-0.20240917153116-6f2963f01587 h1:xzZOeCMQLA/W198ZkdVdt4EKFKJtS26B773zNU377ZY=

internal/datastore/common/helpers.go

@@ -2,27 +2,15 @@ package common
 
 import (
 	"context"
-	"errors"
 	"fmt"
-	"strconv"
-	"strings"
 
-	"github.com/dustin/go-humanize"
-	"github.com/pbnjay/memory"
 	"google.golang.org/protobuf/types/known/structpb"
 
 	"github.com/authzed/spicedb/pkg/datastore"
 	core "github.com/authzed/spicedb/pkg/proto/core/v1"
 	"github.com/authzed/spicedb/pkg/tuple"
 )
 
-// At startup, measure 75% of available free memory.
-var freeMemory uint64
-
-func init() {
-	freeMemory = memory.FreeMemory() / 100 * 75
-}
-
 // WriteRelationships is a convenience method to perform the same update operation on a set of relationships
 func WriteRelationships(ctx context.Context, ds datastore.Datastore, op tuple.UpdateOperation, rels ...tuple.Relationship) (datastore.Revision, error) {
 	updates := make([]tuple.RelationshipUpdate, 0, len(rels))
@@ -59,45 +47,3 @@ func ContextualizedCaveatFrom(name string, context map[string]any) (*core.Contex
 	}
 	return caveat, nil
 }
-
-var errOverHundredPercent = errors.New("percentage greater than 100")
-
-func parsePercent(str string, freeMem uint64) (uint64, error) {
-	percent := strings.TrimSuffix(str, "%")
-	parsedPercent, err := strconv.ParseUint(percent, 10, 64)
-	if err != nil {
-		return 0, fmt.Errorf("failed to parse percentage: %w", err)
-	}
-
-	if parsedPercent > 100 {
-		return 0, errOverHundredPercent
-	}
-
-	return freeMem / 100 * parsedPercent, nil
-}
-
-// WatchBufferSize takes a string and interprets it as
-// either a percentage of memory (as a percentage of
-// 75% of free memory as measured on startup)
-// or a humanized byte string and returns the number of
-// bytes or an error if the value cannot be interpreted.
-// Returns 0 on an empty string.
-func WatchBufferSize(sizeString string) (size uint64, err error) {
-	if sizeString == "" {
-		return 0, nil
-	}
-
-	if strings.HasSuffix(sizeString, "%") {
-		size, err := parsePercent(sizeString, freeMemory)
-		if err != nil {
-			return 0, fmt.Errorf("could not parse %s as percentage: %w", sizeString, err)
-		}
-		return size, nil
-	}
-
-	size, err = humanize.ParseBytes(sizeString)
-	if err != nil {
-		return 0, fmt.Errorf("could not parse %s as a number of bytes: %w", sizeString, err)
-	}
-	return size, nil
-}

internal/datastore/context.go

@@ -66,6 +66,10 @@ func (p *ctxProxy) RevisionFromString(serialized string) (datastore.Revision, er
 	return p.delegate.RevisionFromString(serialized)
 }
 
+func (p *ctxProxy) DefaultsWatchOptions() datastore.WatchOptions {
+	return p.delegate.DefaultsWatchOptions()
+}
+
 func (p *ctxProxy) Watch(ctx context.Context, afterRevision datastore.Revision, options datastore.WatchOptions) (<-chan datastore.RevisionChanges, <-chan error) {
 	return p.delegate.Watch(ctx, afterRevision, options)
 }

internal/datastore/crdb/crdb.go

@@ -180,24 +180,20 @@ func newCRDBDatastore(ctx context.Context, url string, options ...Option) (datas
 			config.followerReadDelay,
 			config.revisionQuantization,
 		),
-		CommonDecoder:                revisions.CommonDecoder{Kind: revisions.HybridLogicalClock},
-		MigrationValidator:           common.NewMigrationValidator(headMigration, config.allowedMigrations),
-		dburl:                        url,
-		acquireTimeout:               config.acquireTimeout,
-		watchBufferLength:            config.watchBufferLength,
-		watchChangeBufferMaximumSize: config.watchChangeBufferMaximumSize,
-		watchBufferWriteTimeout:      config.watchBufferWriteTimeout,
-		watchConnectTimeout:          config.watchConnectTimeout,
-		writeOverlapKeyer:            keyer,
-		overlapKeyInit:               keySetInit,
-		beginChangefeedQuery:         changefeedQuery,
-		transactionNowQuery:          transactionNowQuery,
-		analyzeBeforeStatistics:      config.analyzeBeforeStatistics,
-		filterMaximumIDCount:         config.filterMaximumIDCount,
-		supportsIntegrity:            config.withIntegrity,
-		gcWindow:                     config.gcWindow,
-		watchEnabled:                 !config.watchDisabled,
-		schema:                       *schema.Schema(config.columnOptimizationOption, config.withIntegrity, false),
+		CommonDecoder:           revisions.CommonDecoder{Kind: revisions.HybridLogicalClock},
+		MigrationValidator:      common.NewMigrationValidator(headMigration, config.allowedMigrations),
+		dburl:                   url,
+		acquireTimeout:          config.acquireTimeout,
+		writeOverlapKeyer:       keyer,
+		overlapKeyInit:          keySetInit,
+		beginChangefeedQuery:    changefeedQuery,
+		transactionNowQuery:     transactionNowQuery,
+		analyzeBeforeStatistics: config.analyzeBeforeStatistics,
+		filterMaximumIDCount:    config.filterMaximumIDCount,
+		supportsIntegrity:       config.withIntegrity,
+		gcWindow:                config.gcWindow,
+		watchEnabled:            !config.watchDisabled,
+		schema:                  *schema.Schema(config.columnOptimizationOption, config.withIntegrity, false),
 	}
 	ds.SetNowFunc(ds.headRevisionInternal)
 
@@ -262,19 +258,15 @@ type crdbDatastore struct {
 	revisions.CommonDecoder
 	*common.MigrationValidator
 
-	dburl                        string
-	readPool, writePool          *pool.RetryPool
-	collectors                   []prometheus.Collector
-	watchBufferLength            uint16
-	watchChangeBufferMaximumSize uint64
-	watchBufferWriteTimeout      time.Duration
-	watchConnectTimeout          time.Duration
-	writeOverlapKeyer            overlapKeyer
-	overlapKeyInit               func(ctx context.Context) keySet
-	analyzeBeforeStatistics      bool
-	gcWindow                     time.Duration
-	schema                       common.SchemaInformation
-	acquireTimeout               time.Duration
+	dburl                   string
+	readPool, writePool     *pool.RetryPool
+	collectors              []prometheus.Collector
+	writeOverlapKeyer       overlapKeyer
+	overlapKeyInit          func(ctx context.Context) keySet
+	analyzeBeforeStatistics bool
+	gcWindow                time.Duration
+	schema                  common.SchemaInformation
+	acquireTimeout          time.Duration
 
 	beginChangefeedQuery string
 	transactionNowQuery  string

internal/datastore/crdb/crdb_test.go

@@ -74,15 +74,14 @@ func crdbTestVersion() string {
 func TestCRDBDatastoreWithoutIntegrity(t *testing.T) {
 	t.Parallel()
 	b := testdatastore.RunCRDBForTesting(t, "", crdbTestVersion())
-	test.All(t, test.DatastoreTesterFunc(func(revisionQuantization, gcInterval, gcWindow time.Duration, watchBufferLength uint16) (datastore.Datastore, error) {
+	test.All(t, test.DatastoreTesterFunc(func(revisionQuantization, gcInterval, gcWindow time.Duration, _ uint16) (datastore.Datastore, error) {
 		ctx := context.Background()
 		ds := b.NewDatastore(t, func(engine, uri string) datastore.Datastore {
 			ds, err := NewCRDBDatastore(
 				ctx,
 				uri,
 				GCWindow(gcWindow),
 				RevisionQuantization(revisionQuantization),
-				WatchBufferLength(watchBufferLength),
 				OverlapStrategy(overlapStrategyPrefix),
 				DebugAnalyzeBeforeStatistics(),
 				WithAcquireTimeout(5*time.Second),
@@ -202,15 +201,14 @@ func TestCRDBDatastoreWithIntegrity(t *testing.T) { //nolint:tparallel
 	t.Parallel()
 	b := testdatastore.RunCRDBForTesting(t, "", crdbTestVersion())
 
-	test.All(t, test.DatastoreTesterFunc(func(revisionQuantization, gcInterval, gcWindow time.Duration, watchBufferLength uint16) (datastore.Datastore, error) {
+	test.All(t, test.DatastoreTesterFunc(func(revisionQuantization, gcInterval, gcWindow time.Duration, _ uint16) (datastore.Datastore, error) {
 		ctx := context.Background()
 		ds := b.NewDatastore(t, func(engine, uri string) datastore.Datastore {
 			ds, err := NewCRDBDatastore(
 				ctx,
 				uri,
 				GCWindow(gcWindow),
 				RevisionQuantization(revisionQuantization),
-				WatchBufferLength(watchBufferLength),
 				OverlapStrategy(overlapStrategyPrefix),
 				DebugAnalyzeBeforeStatistics(),
 				WithIntegrity(true),
@@ -229,15 +227,14 @@ func TestCRDBDatastoreWithIntegrity(t *testing.T) { //nolint:tparallel
 		return ds, nil
 	}), false)
 
-	unwrappedTester := test.DatastoreTesterFunc(func(revisionQuantization, gcInterval, gcWindow time.Duration, watchBufferLength uint16) (datastore.Datastore, error) {
+	unwrappedTester := test.DatastoreTesterFunc(func(revisionQuantization, gcInterval, gcWindow time.Duration, _ uint16) (datastore.Datastore, error) {
 		ctx := context.Background()
 		ds := b.NewDatastore(t, func(engine, uri string) datastore.Datastore {
 			ds, err := NewCRDBDatastore(
 				ctx,
 				uri,
 				GCWindow(gcWindow),
 				RevisionQuantization(revisionQuantization),
-				WatchBufferLength(watchBufferLength),
 				OverlapStrategy(overlapStrategyPrefix),
 				DebugAnalyzeBeforeStatistics(),
 				WithIntegrity(true),
@@ -331,7 +328,7 @@ func TestWatchFeatureDetection(t *testing.T) {
 				headRevision, err := ds.HeadRevision(ctx)
 				require.NoError(t, err)
 
-				_, errChan := ds.Watch(ctx, headRevision, datastore.WatchJustRelationships())
+				_, errChan := ds.Watch(ctx, headRevision, datastore.WatchJustRelationships(ds))
 				err = <-errChan
 				require.Error(t, err)
 				require.Contains(t, err.Error(), "watch is currently disabled")

internal/datastore/crdb/options.go

@@ -15,10 +15,6 @@ type crdbOptions struct {
 	readPoolOpts, writePoolOpts pgxcommon.PoolOptions
 	connectRate                 time.Duration
 
-	watchBufferLength              uint16
-	watchChangeBufferMaximumSize   uint64
-	watchBufferWriteTimeout        time.Duration
-	watchConnectTimeout            time.Duration
 	revisionQuantization           time.Duration
 	followerReadDelay              time.Duration
 	maxRevisionStalenessPercent    float64
@@ -76,9 +72,6 @@ type Option func(*crdbOptions)
 func generateConfig(options []Option) (crdbOptions, error) {
 	computed := crdbOptions{
 		gcWindow:                       24 * time.Hour,
-		watchBufferLength:              defaultWatchBufferLength,
-		watchBufferWriteTimeout:        defaultWatchBufferWriteTimeout,
-		watchConnectTimeout:            defaultWatchConnectTimeout,
 		revisionQuantization:           defaultRevisionQuantization,
 		followerReadDelay:              defaultFollowerReadDelay,
 		maxRevisionStalenessPercent:    defaultMaxRevisionStalenessPercent,
@@ -251,34 +244,6 @@ func WriteConnsMaxOpen(conns int) Option {
 	return func(po *crdbOptions) { po.writePoolOpts.MaxOpenConns = &conns }
 }
 
-// WatchBufferLength is the number of entries that can be stored in the watch
-// buffer while awaiting read by the client.
-//
-// This value defaults to 128.
-func WatchBufferLength(watchBufferLength uint16) Option {
-	return func(po *crdbOptions) { po.watchBufferLength = watchBufferLength }
-}
-
-// WatchBufferWriteTimeout is the maximum timeout for writing to the watch buffer,
-// after which the caller to the watch will be disconnected.
-func WatchBufferWriteTimeout(watchBufferWriteTimeout time.Duration) Option {
-	return func(po *crdbOptions) { po.watchBufferWriteTimeout = watchBufferWriteTimeout }
-}
-
-// WatchBufferMaximumSize is the maximum size in bytes of the watch buffer.
-// If this value is exceeded the caller will receive an error.
-func WatchChangeBufferMaximumSize(maxSize uint64) Option {
-	return func(po *crdbOptions) { po.watchChangeBufferMaximumSize = maxSize }
-}
-
-// WatchConnectTimeout is the maximum timeout for connecting the watch stream
-// to the datastore.
-//
-// This value defaults to 1 second.
-func WatchConnectTimeout(watchConnectTimeout time.Duration) Option {
-	return func(po *crdbOptions) { po.watchConnectTimeout = watchConnectTimeout }
-}
-
 // RevisionQuantization is the time bucket size to which advertised revisions
 // will be rounded.
 //

internal/datastore/crdb/pool_test.go

@@ -107,7 +107,6 @@ func TestTxReset(t *testing.T) {
 					uri,
 					GCWindow(24*time.Hour),
 					RevisionQuantization(5*time.Second),
-					WatchBufferLength(128),
 					MaxRetries(tt.maxRetries),
 					WithAcquireTimeout(5*time.Second),
 				)