Fix issue #167 - Concurrent write/write of in-flight shard map (#168)

Co-authored-by: Sanket Deshpande <sanket@clearblade.com>

README.md

@@ -119,7 +119,7 @@ The uniq identifier for a consumer is `[appName, streamName, shardID]`
 
 Note: The default storage is in-memory (no-op). Which means the scan will not persist any state and the consumer will start from the beginning of the stream each time it is re-started.
 
-The consumer accpets a `WithStore` option to set the storage layer:
+The consumer accepts a `WithStore` option to set the storage layer:
 
 ```go
 c, err := consumer.New(*stream, consumer.WithStore(db))
@@ -132,7 +132,7 @@ To persist scan progress choose one of the following storage layers:
 
 #### Redis
 
-The Redis checkpoint requries App Name, and Stream Name:
+The Redis checkpoint requires App Name, and Stream Name:
 
 ```go
 import store "github.com/harlow/kinesis-consumer/store/redis"
@@ -292,7 +292,7 @@ c, err := consumer.New(
 
 ### Logging
 
-Logging supports the basic built-in logging library or use thrid party external one, so long as
+Logging supports the basic built-in logging library or use third party external one, so long as
 it implements the Logger interface.
 
 For example, to use the builtin logging package, we wrap it with myLogger structure.

allgroup.go

@@ -2,21 +2,23 @@ package consumer
 
 import (
 	"context"
+	"fmt"
 	"sync"
 	"time"
 
 	"github.com/aws/aws-sdk-go-v2/service/kinesis/types"
 )
 
-// NewAllGroup returns an intitialized AllGroup for consuming
+// NewAllGroup returns an initialized AllGroup for consuming
 // all shards on a stream
 func NewAllGroup(ksis kinesisClient, store Store, streamName string, logger Logger) *AllGroup {
 	return &AllGroup{
-		ksis:       ksis,
+		ksis:         ksis,
-		shards:     make(map[string]types.Shard),
+		shards:       make(map[string]types.Shard),
-		streamName: streamName,
+		shardsClosed: make(map[string]chan struct{}),
-		logger:     logger,
+		streamName:   streamName,
-		Store:      store,
+		logger:       logger,
+		Store:        store,
 	}
 }
 
@@ -29,18 +31,19 @@ type AllGroup struct {
 	logger     Logger
 	Store
 
-	shardMu sync.Mutex
+	shardMu      sync.Mutex
-	shards  map[string]types.Shard
+	shards       map[string]types.Shard
+	shardsClosed map[string]chan struct{}
 }
 
 // Start is a blocking operation which will loop and attempt to find new
 // shards on a regular cadence.
-func (g *AllGroup) Start(ctx context.Context, shardc chan types.Shard) {
+func (g *AllGroup) Start(ctx context.Context, shardC chan types.Shard) error {
 	// Note: while ticker is a rather naive approach to this problem,
-	// it actually simplifies a few things. i.e. If we miss a new shard
+	// it actually simplifies a few things. I.e. If we miss a new shard
-	// while AWS is resharding we'll pick it up max 30 seconds later.
+	// while AWS is resharding, we'll pick it up max 30 seconds later.
 
-	// It might be worth refactoring this flow to allow the consumer to
+	// It might be worth refactoring this flow to allow the consumer
 	// to notify the broker when a shard is closed. However, shards don't
 	// necessarily close at the same time, so we could potentially get a
 	// thundering heard of notifications from the consumer.
@@ -48,21 +51,50 @@ func (g *AllGroup) Start(ctx context.Context, shardc chan types.Shard) {
 	var ticker = time.NewTicker(30 * time.Second)
 
 	for {
-		g.findNewShards(ctx, shardc)
+		if err := g.findNewShards(ctx, shardC); err != nil {
+			ticker.Stop()
+			return err
+		}
 
 		select {
 		case <-ctx.Done():
 			ticker.Stop()
-			return
+			return nil
 		case <-ticker.C:
 		}
 	}
 }
 
+func (g *AllGroup) CloseShard(_ context.Context, shardID string) error {
+	g.shardMu.Lock()
+	defer g.shardMu.Unlock()
+	c, ok := g.shardsClosed[shardID]
+	if !ok {
+		return fmt.Errorf("closing unknown shard ID %q", shardID)
+	}
+	close(c)
+	return nil
+}
+
+func waitForCloseChannel(ctx context.Context, c <-chan struct{}) bool {
+	if c == nil {
+		// no channel means we haven't seen this shard in listShards, so it
+		// probably fell off the TRIM_HORIZON, and we can assume it's fully processed.
+		return true
+	}
+	select {
+	case <-ctx.Done():
+		return false
+	case <-c:
+		// the channel has been processed and closed by the consumer (CloseShard has been called)
+		return true
+	}
+}
+
 // findNewShards pulls the list of shards from the Kinesis API
 // and uses a local cache to determine if we are already processing
 // a particular shard.
-func (g *AllGroup) findNewShards(ctx context.Context, shardc chan types.Shard) {
+func (g *AllGroup) findNewShards(ctx context.Context, shardC chan types.Shard) error {
 	g.shardMu.Lock()
 	defer g.shardMu.Unlock()
 
@@ -71,14 +103,42 @@ func (g *AllGroup) findNewShards(ctx context.Context, shardc chan types.Shard) {
 	shards, err := listShards(ctx, g.ksis, g.streamName)
 	if err != nil {
 		g.logger.Log("[GROUP] error:", err)
-		return
+		return err
 	}
 
+	// We do two `for` loops, since we have to set up all the `shardClosed`
+	// channels before we start using any of them.  It's highly probable
+	// that Kinesis provides us the shards in dependency order (parents
+	// before children), but it doesn't appear to be a guarantee.
+	newShards := make(map[string]types.Shard)
 	for _, shard := range shards {
 		if _, ok := g.shards[*shard.ShardId]; ok {
 			continue
 		}
 		g.shards[*shard.ShardId] = shard
-		shardc <- shard
+		g.shardsClosed[*shard.ShardId] = make(chan struct{})
+		newShards[*shard.ShardId] = shard
 	}
+	// only new shards need to be checked for parent dependencies
+	for _, shard := range newShards {
+		shard := shard // Shadow shard, since we use it in goroutine
+		var parent1, parent2 <-chan struct{}
+		if shard.ParentShardId != nil {
+			parent1 = g.shardsClosed[*shard.ParentShardId]
+		}
+		if shard.AdjacentParentShardId != nil {
+			parent2 = g.shardsClosed[*shard.AdjacentParentShardId]
+		}
+		go func() {
+			// Asynchronously wait for all parents of this shard to be processed
+			// before providing it out to our client.  Kinesis guarantees that a
+			// given partition key's data will be provided to clients in-order,
+			// but when splits or joins happen, we need to process all parents prior
+			// to processing children or that ordering guarantee is not maintained.
+			if waitForCloseChannel(ctx, parent1) && waitForCloseChannel(ctx, parent2) {
+				shardC <- shard
+			}
+		}()
+	}
+	return nil
 }

consumer.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"sync"
 	"time"
@@ -38,7 +38,7 @@ func New(streamName string, opts ...Option) (*Consumer, error) {
 		store:                    &noopStore{},
 		counter:                  &noopCounter{},
 		logger: &noopLogger{
-			logger: log.New(ioutil.Discard, "", log.LstdFlags),
+			logger: log.New(io.Discard, "", log.LstdFlags),
 		},
 		scanInterval: 250 * time.Millisecond,
 		maxRecords:   10000,
@@ -90,7 +90,7 @@ type Consumer struct {
 type ScanFunc func(*Record) error
 
 // ErrSkipCheckpoint is used as a return value from ScanFunc to indicate that
-// the current checkpoint should be skipped skipped. It is not returned
+// the current checkpoint should be skipped. It is not returned
 // as an error by any function.
 var ErrSkipCheckpoint = errors.New("skip checkpoint")
 
@@ -102,40 +102,60 @@ func (c *Consumer) Scan(ctx context.Context, fn ScanFunc) error {
 	defer cancel()
 
 	var (
-		errc   = make(chan error, 1)
+		errC   = make(chan error, 1)
-		shardc = make(chan types.Shard, 1)
+		shardC = make(chan types.Shard, 1)
 	)
 
 	go func() {
-		c.group.Start(ctx, shardc)
+		err := c.group.Start(ctx, shardC)
+		if err != nil {
+			errC <- fmt.Errorf("error starting scan: %w", err)
+			cancel()
+		}
 		<-ctx.Done()
-		close(shardc)
+		close(shardC)
 	}()
 
 	wg := new(sync.WaitGroup)
 	// process each of the shards
-	for shard := range shardc {
+	s := newShardsInProcess()
+	for shard := range shardC {
+		shardId := aws.ToString(shard.ShardId)
+		if s.doesShardExist(shardId) {
+			// safetynet: if shard already in process by another goroutine, just skipping the request
+			continue
+		}
 		wg.Add(1)
 		go func(shardID string) {
+			s.addShard(shardID)
+			defer func() {
+				s.deleteShard(shardID)
+			}()
 			defer wg.Done()
-			if err := c.ScanShard(ctx, shardID, fn); err != nil {
+			var err error
+			if err = c.ScanShard(ctx, shardID, fn); err != nil {
+				err = fmt.Errorf("shard %s error: %w", shardID, err)
+			} else if closeable, ok := c.group.(CloseableGroup); !ok {
+				// group doesn't allow closure, skip calling CloseShard
+			} else if err = closeable.CloseShard(ctx, shardID); err != nil {
+				err = fmt.Errorf("shard closed CloseableGroup error: %w", err)
+			}
+			if err != nil {
 				select {
-				case errc <- fmt.Errorf("shard %s error: %w", shardID, err):
+				case errC <- fmt.Errorf("shard %s error: %w", shardID, err):
-					// first error to occur
 					cancel()
 				default:
-					// error has already occurred
 				}
 			}
-		}(aws.ToString(shard.ShardId))
+		}(shardId)
 	}
 
 	go func() {
 		wg.Wait()
-		close(errc)
+		close(errC)
 	}()
 
-	return <-errc
+	return <-errC
 }
 
 // ScanShard loops over records on a specific shard, calls the callback func
@@ -199,14 +219,12 @@ func (c *Consumer) ScanShard(ctx context.Context, shardID string, fn ScanFunc) e
 					return nil
 				default:
 					err := fn(&Record{r, shardID, resp.MillisBehindLatest})
-					if err != nil && err != ErrSkipCheckpoint {
+					if err != nil && !errors.Is(err, ErrSkipCheckpoint) {
 						return err
 					}
 
-					if err != ErrSkipCheckpoint {
+					if err := c.group.SetCheckpoint(c.streamName, shardID, *r.SequenceNumber); err != nil {
-						if err := c.group.SetCheckpoint(c.streamName, shardID, *r.SequenceNumber); err != nil {
+						return err
-							return err
-						}
 					}
 
 					c.counter.Add("records", 1)
@@ -218,9 +236,7 @@ func (c *Consumer) ScanShard(ctx context.Context, shardID string, fn ScanFunc) e
 				c.logger.Log("[CONSUMER] shard closed:", shardID)
 
 				if c.shardClosedHandler != nil {
-					err := c.shardClosedHandler(c.streamName, shardID)
+					if err := c.shardClosedHandler(c.streamName, shardID); err != nil {
-
-					if err != nil {
 						return fmt.Errorf("shard closed handler error: %w", err)
 					}
 				}
@@ -272,18 +288,21 @@ func (c *Consumer) getShardIterator(ctx context.Context, streamName, shardID, se
 		params.ShardIteratorType = types.ShardIteratorTypeAtTimestamp
 		params.Timestamp = c.initialTimestamp
 	} else {
-		params.ShardIteratorType = types.ShardIteratorType(c.initialShardIteratorType)
+		params.ShardIteratorType = c.initialShardIteratorType
 	}
 
 	res, err := c.client.GetShardIterator(ctx, params)
-	return res.ShardIterator, err
+	if err != nil {
+		return nil, err
+	}
+	return res.ShardIterator, nil
 }
 
 func isRetriableError(err error) bool {
-	switch err.(type) {
+	if oe := (*types.ExpiredIteratorException)(nil); errors.As(err, &oe) {
-	case *types.ExpiredIteratorException:
 		return true
-	case *types.ProvisionedThroughputExceededException:
+	}
+	if oe := (*types.ProvisionedThroughputExceededException)(nil); errors.As(err, &oe) {
 		return true
 	}
 	return false
@@ -292,3 +311,24 @@ func isRetriableError(err error) bool {
 func isShardClosed(nextShardIterator, currentShardIterator *string) bool {
 	return nextShardIterator == nil || currentShardIterator == nextShardIterator
 }
+
+type shards struct {
+	shardsInProcess sync.Map
+}
+
+func newShardsInProcess() *shards {
+	return &shards{}
+}
+
+func (s *shards) addShard(shardId string) {
+	s.shardsInProcess.Store(shardId, struct{}{})
+}
+
+func (s *shards) doesShardExist(shardId string) bool {
+	_, ok := s.shardsInProcess.Load(shardId)
+	return ok
+}
+
+func (s *shards) deleteShard(shardId string) {
+	s.shardsInProcess.Delete(shardId)
+}

consumer_test.go

@@ -2,9 +2,12 @@ package consumer
 
 import (
 	"context"
+	"errors"
 	"fmt"
+	"math/rand"
 	"sync"
 	"testing"
+	"time"
 
 	"github.com/aws/aws-sdk-go-v2/aws"
 	"github.com/aws/aws-sdk-go-v2/service/kinesis"
@@ -24,6 +27,15 @@ var records = []types.Record{
 	},
 }
 
+// Implement logger to wrap testing.T.Log.
+type testLogger struct {
+	t *testing.T
+}
+
+func (t *testLogger) Log(args ...interface{}) {
+	t.t.Log(args...)
+}
+
 func TestNew(t *testing.T) {
 	if _, err := New("myStreamName"); err != nil {
 		t.Fatalf("new consumer error: %v", err)
@@ -60,6 +72,7 @@ func TestScan(t *testing.T) {
 		WithClient(client),
 		WithCounter(ctr),
 		WithStore(cp),
+		WithLogger(&testLogger{t}),
 	)
 	if err != nil {
 		t.Fatalf("new consumer error: %v", err)
@@ -98,6 +111,71 @@ func TestScan(t *testing.T) {
 	}
 }
 
+func TestScan_ListShardsError(t *testing.T) {
+	mockError := errors.New("mock list shards error")
+	client := &kinesisClientMock{
+		listShardsMock: func(ctx context.Context, params *kinesis.ListShardsInput, optFns ...func(*kinesis.Options)) (*kinesis.ListShardsOutput, error) {
+			return nil, mockError
+		},
+	}
+
+	// use cancel func to signal shutdown
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+
+	var res string
+	var fn = func(r *Record) error {
+		res += string(r.Data)
+		cancel() // simulate cancellation while processing first record
+		return nil
+	}
+
+	c, err := New("myStreamName", WithClient(client))
+	if err != nil {
+		t.Fatalf("new consumer error: %v", err)
+	}
+
+	err = c.Scan(ctx, fn)
+	if !errors.Is(err, mockError) {
+		t.Errorf("expected an error from listShards, but instead got %v", err)
+	}
+}
+
+func TestScan_GetShardIteratorError(t *testing.T) {
+	mockError := errors.New("mock get shard iterator error")
+	client := &kinesisClientMock{
+		listShardsMock: func(ctx context.Context, params *kinesis.ListShardsInput, optFns ...func(*kinesis.Options)) (*kinesis.ListShardsOutput, error) {
+			return &kinesis.ListShardsOutput{
+				Shards: []types.Shard{
+					{ShardId: aws.String("myShard")},
+				},
+			}, nil
+		},
+		getShardIteratorMock: func(ctx context.Context, params *kinesis.GetShardIteratorInput, optFns ...func(*kinesis.Options)) (*kinesis.GetShardIteratorOutput, error) {
+			return nil, mockError
+		},
+	}
+
+	// use cancel func to signal shutdown
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+
+	var res string
+	var fn = func(r *Record) error {
+		res += string(r.Data)
+		cancel() // simulate cancellation while processing first record
+		return nil
+	}
+
+	c, err := New("myStreamName", WithClient(client))
+	if err != nil {
+		t.Fatalf("new consumer error: %v", err)
+	}
+
+	err = c.Scan(ctx, fn)
+	if !errors.Is(err, mockError) {
+		t.Errorf("expected an error from getShardIterator, but instead got %v", err)
+	}
+}
+
 func TestScanShard(t *testing.T) {
 	var client = &kinesisClientMock{
 		getShardIteratorMock: func(ctx context.Context, params *kinesis.GetShardIteratorInput, optFns ...func(*kinesis.Options)) (*kinesis.GetShardIteratorOutput, error) {
@@ -122,6 +200,7 @@ func TestScanShard(t *testing.T) {
 		WithClient(client),
 		WithCounter(ctr),
 		WithStore(cp),
+		WithLogger(&testLogger{t}),
 	)
 	if err != nil {
 		t.Fatalf("new consumer error: %v", err)
@@ -301,7 +380,8 @@ func TestScanShard_ShardIsClosed_WithShardClosedHandler(t *testing.T) {
 		WithClient(client),
 		WithShardClosedHandler(func(streamName, shardID string) error {
 			return fmt.Errorf("closed shard error")
-		}))
+		}),
+		WithLogger(&testLogger{t}))
 	if err != nil {
 		t.Fatalf("new consumer error: %v", err)
 	}
@@ -335,7 +415,7 @@ func TestScanShard_GetRecordsError(t *testing.T) {
 		return nil
 	}
 
-	c, err := New("myStreamName", WithClient(client))
+	c, err := New("myStreamName", WithClient(client), WithLogger(&testLogger{t}))
 	if err != nil {
 		t.Fatalf("new consumer error: %v", err)
 	}
@@ -384,3 +464,201 @@ func (fc *fakeCounter) Add(streamName string, count int64) {
 
 	fc.counter += count
 }
+
+func TestScan_PreviousParentsBeforeTrimHorizon(t *testing.T) {
+	client := &kinesisClientMock{
+		getShardIteratorMock: func(ctx context.Context, params *kinesis.GetShardIteratorInput, optFns ...func(*kinesis.Options)) (*kinesis.GetShardIteratorOutput, error) {
+			return &kinesis.GetShardIteratorOutput{
+				ShardIterator: aws.String("49578481031144599192696750682534686652010819674221576194"),
+			}, nil
+		},
+		getRecordsMock: func(ctx context.Context, params *kinesis.GetRecordsInput, optFns ...func(*kinesis.Options)) (*kinesis.GetRecordsOutput, error) {
+			return &kinesis.GetRecordsOutput{
+				NextShardIterator: nil,
+				Records:           records,
+			}, nil
+		},
+		listShardsMock: func(ctx context.Context, params *kinesis.ListShardsInput, optFns ...func(*kinesis.Options)) (*kinesis.ListShardsOutput, error) {
+			return &kinesis.ListShardsOutput{
+				Shards: []types.Shard{
+					{
+						ShardId:               aws.String("myShard"),
+						ParentShardId:         aws.String("myOldParent"),
+						AdjacentParentShardId: aws.String("myOldAdjacentParent"),
+					},
+				},
+			}, nil
+		},
+	}
+	var (
+		cp  = store.New()
+		ctr = &fakeCounter{}
+	)
+
+	c, err := New("myStreamName",
+		WithClient(client),
+		WithCounter(ctr),
+		WithStore(cp),
+		WithLogger(&testLogger{t}),
+	)
+	if err != nil {
+		t.Fatalf("new consumer error: %v", err)
+	}
+
+	var (
+		ctx, cancel = context.WithCancel(context.Background())
+		res         string
+	)
+
+	var fn = func(r *Record) error {
+		res += string(r.Data)
+
+		if string(r.Data) == "lastData" {
+			cancel()
+		}
+
+		return nil
+	}
+
+	if err := c.Scan(ctx, fn); err != nil {
+		t.Errorf("scan returned unexpected error %v", err)
+	}
+
+	if res != "firstDatalastData" {
+		t.Errorf("callback error expected %s, got %s", "firstDatalastData", res)
+	}
+
+	if val := ctr.Get(); val != 2 {
+		t.Errorf("counter error expected %d, got %d", 2, val)
+	}
+
+	val, err := cp.GetCheckpoint("myStreamName", "myShard")
+	if err != nil && val != "lastSeqNum" {
+		t.Errorf("checkout error expected %s, got %s", "lastSeqNum", val)
+	}
+}
+
+func TestScan_ParentChildOrdering(t *testing.T) {
+	// We create a set of shards where shard1 split into (shard2,shard3), then (shard2,shard3) merged into shard4.
+	client := &kinesisClientMock{
+		getShardIteratorMock: func(ctx context.Context, params *kinesis.GetShardIteratorInput, optFns ...func(*kinesis.Options)) (*kinesis.GetShardIteratorOutput, error) {
+			return &kinesis.GetShardIteratorOutput{
+				ShardIterator: aws.String(*params.ShardId + "iter"),
+			}, nil
+		},
+		getRecordsMock: func(ctx context.Context, params *kinesis.GetRecordsInput, optFns ...func(*kinesis.Options)) (*kinesis.GetRecordsOutput, error) {
+			switch *params.ShardIterator {
+			case "shard1iter":
+				return &kinesis.GetRecordsOutput{
+					NextShardIterator: nil,
+					Records: []types.Record{
+						{
+							Data:           []byte("shard1data"),
+							SequenceNumber: aws.String("shard1num"),
+						},
+					},
+				}, nil
+			case "shard2iter":
+				return &kinesis.GetRecordsOutput{
+					NextShardIterator: nil,
+					Records:           []types.Record{},
+				}, nil
+			case "shard3iter":
+				return &kinesis.GetRecordsOutput{
+					NextShardIterator: nil,
+					Records: []types.Record{
+						{
+							Data:           []byte("shard3data"),
+							SequenceNumber: aws.String("shard3num"),
+						},
+					},
+				}, nil
+			case "shard4iter":
+				return &kinesis.GetRecordsOutput{
+					NextShardIterator: nil,
+					Records: []types.Record{
+						{
+							Data:           []byte("shard4data"),
+							SequenceNumber: aws.String("shard4num"),
+						},
+					},
+				}, nil
+			default:
+				panic("got unexpected iterator")
+			}
+		},
+		listShardsMock: func(ctx context.Context, params *kinesis.ListShardsInput, optFns ...func(*kinesis.Options)) (*kinesis.ListShardsOutput, error) {
+			// Intentionally misorder these to test resiliance to ordering issues from ListShards.
+			return &kinesis.ListShardsOutput{
+				Shards: []types.Shard{
+					{
+						ShardId:       aws.String("shard3"),
+						ParentShardId: aws.String("shard1"),
+					},
+					{
+						ShardId:       aws.String("shard1"),
+						ParentShardId: aws.String("shard0"), // not otherwise referenced, parent ordering should ignore this
+					},
+					{
+						ShardId:               aws.String("shard4"),
+						ParentShardId:         aws.String("shard2"),
+						AdjacentParentShardId: aws.String("shard3"),
+					},
+					{
+						ShardId:       aws.String("shard2"),
+						ParentShardId: aws.String("shard1"),
+					},
+				},
+			}, nil
+		},
+	}
+	var (
+		cp  = store.New()
+		ctr = &fakeCounter{}
+	)
+
+	c, err := New("myStreamName",
+		WithClient(client),
+		WithCounter(ctr),
+		WithStore(cp),
+		WithLogger(&testLogger{t}),
+	)
+	if err != nil {
+		t.Fatalf("new consumer error: %v", err)
+	}
+
+	var (
+		ctx, cancel = context.WithCancel(context.Background())
+		res         string
+	)
+
+	rand.Seed(time.Now().UnixNano())
+
+	var fn = func(r *Record) error {
+		res += string(r.Data)
+		time.Sleep(time.Duration(rand.Int()%100) * time.Millisecond)
+
+		if string(r.Data) == "shard4data" {
+			cancel()
+		}
+
+		return nil
+	}
+
+	if err := c.Scan(ctx, fn); err != nil {
+		t.Errorf("scan returned unexpected error %v", err)
+	}
+
+	if want := "shard1datashard3datashard4data"; res != want {
+		t.Errorf("callback error expected %s, got %s", want, res)
+	}
+
+	if val := ctr.Get(); val != 3 {
+		t.Errorf("counter error expected %d, got %d", 2, val)
+	}
+
+	val, err := cp.GetCheckpoint("myStreamName", "shard4data")
+	if err != nil && val != "shard4num" {
+		t.Errorf("checkout error expected %s, got %s", "shard4num", val)
+	}
+}

go.mod

@@ -7,22 +7,19 @@ require (
 	github.com/apex/log v1.6.0
 	github.com/aws/aws-sdk-go-v2 v1.11.2
 	github.com/aws/aws-sdk-go-v2/config v1.6.1
-	github.com/aws/aws-sdk-go-v2/credentials v1.3.3 // indirect
+	github.com/aws/aws-sdk-go-v2/credentials v1.3.3
-	github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue v1.2.0 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue v1.2.0
-	github.com/aws/aws-sdk-go-v2/service/dynamodb v1.5.0 // indirect
+	github.com/aws/aws-sdk-go-v2/service/dynamodb v1.5.0
 	github.com/aws/aws-sdk-go-v2/service/kinesis v1.6.0
 	github.com/awslabs/kinesis-aggregation/go v0.0.0-20210630091500-54e17340d32f
-	github.com/go-redis/redis/v8 v8.0.0-beta.6
+	github.com/go-redis/redis/v9 v9.0.0-rc.2
 	github.com/go-sql-driver/mysql v1.5.0
-	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/golang/protobuf v1.5.2
 	github.com/gomodule/redigo v2.0.0+incompatible // indirect
-	github.com/google/go-cmp v0.5.6 // indirect
-	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/lib/pq v1.7.0
 	github.com/pkg/errors v0.9.1
-	github.com/stretchr/testify v1.7.0 // indirect
+	github.com/stretchr/testify v1.8.1
 	github.com/yuin/gopher-lua v0.0.0-20200603152657-dc2b0ca8b37e // indirect
-	google.golang.org/protobuf v1.27.1 // indirect
 )
 
 go 1.13

go.sum

@@ -1,13 +1,5 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/DATA-DOG/go-sqlmock v1.4.1 h1:ThlnYciV1iM/V0OSF/dtkqWb6xo5qITT1TJBG1MRDJM=
 github.com/DATA-DOG/go-sqlmock v1.4.1/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
-github.com/DataDog/sketches-go v0.0.0-20190923095040-43f19ad77ff7 h1:qELHH0AWCvf98Yf+CNIJx9vOZOfHFDDzgDRYsnNk/vs=
-github.com/DataDog/sketches-go v0.0.0-20190923095040-43f19ad77ff7/go.mod h1:Q5DbzQ+3AkgGwymQO7aZFNP7ns2lZKGtvRBzRXfdi60=
-github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
-github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a h1:HbKu58rmZpUGpz5+4FfNmIU+FmZg2P3Xaj2v2bfNWmk=
 github.com/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a/go.mod h1:SGnFV6hVsYE877CKEZ6tDNTjaSXYUk6QqoIK6PrAtcc=
 github.com/alicebob/miniredis v2.5.0+incompatible h1:yBHoLpsyjupjz3NL3MhKMVkR41j82Yjf3KFv7ApYzUI=
@@ -18,13 +10,8 @@ github.com/apex/logs v1.0.0/go.mod h1:XzxuLZ5myVHDy9SAmYpamKKRNApGj54PfYLcFrXqDw
 github.com/aphistic/golf v0.0.0-20180712155816-02c07f170c5a/go.mod h1:3NqKYiepwy8kCu4PNA+aP7WUV72eXWJeP9/r3/K9aLE=
 github.com/aphistic/sweet v0.2.0/go.mod h1:fWDlIh/isSE9n6EPsRmC0det+whmX6dJid3stzu0Xys=
 github.com/aws/aws-sdk-go v1.19.48/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
-github.com/aws/aws-sdk-go v1.20.6 h1:kmy4Gvdlyez1fV4kw5RYxZzWKVyuHZHgPWeU/YvRsV4=
 github.com/aws/aws-sdk-go v1.20.6/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
-github.com/aws/aws-sdk-go v1.40.27 h1:8fWW0CpmBZ8WWduNwl4vE9t07nMYFrhAsUHjPj81qUM=
-github.com/aws/aws-sdk-go v1.40.27/go.mod h1:585smgzpB/KqRA+K3y/NL/oYRqQvpNJYvLm+LY1U59Q=
-github.com/aws/aws-sdk-go-v2 v1.8.1 h1:GcFgQl7MsBygmeeqXyV1ivrTEmsVz/rdFJaTcltG9ag=
 github.com/aws/aws-sdk-go-v2 v1.8.1/go.mod h1:xEFuWz+3TYdlPRuo+CqATbeDWIWyaT5uAPwPaWtgse0=
-github.com/aws/aws-sdk-go-v2 v1.9.0 h1:+S+dSqQCN3MSU5vJRu1HqHrq00cJn6heIMU7X9hcsoo=
 github.com/aws/aws-sdk-go-v2 v1.9.0/go.mod h1:cK/D0BBs0b/oWPIcX/Z/obahJK1TT7IPVjy53i/mX/4=
 github.com/aws/aws-sdk-go-v2 v1.11.2 h1:SDiCYqxdIYi6HgQfAWRhgdZrdnOuGyLDJVRSWLeHWvs=
 github.com/aws/aws-sdk-go-v2 v1.11.2/go.mod h1:SQfA+m2ltnu1cA0soUkj4dRSsmITiVQUJvBIZjzfPyQ=
@@ -50,84 +37,67 @@ github.com/aws/aws-sdk-go-v2/service/internal/endpoint-discovery v1.1.0 h1:QCPbs
 github.com/aws/aws-sdk-go-v2/service/internal/endpoint-discovery v1.1.0/go.mod h1:enkU5tq2HoXY+ZMiQprgF3Q83T3PbO77E83yXXzRZWE=
 github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.2.3 h1:VxFCgxsqWe7OThOwJ5IpFX3xrObtuIH9Hg/NW7oot1Y=
 github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.2.3/go.mod h1:7gcsONBmFoCcKrAqrm95trrMd2+C/ReYKP7Vfu8yHHA=
-github.com/aws/aws-sdk-go-v2/service/kinesis v1.5.3 h1:ScnzrRDDZsARgwEXFBuE8cQ4rkm2yuaA72Gad4NNVK8=
-github.com/aws/aws-sdk-go-v2/service/kinesis v1.5.3/go.mod h1:1C+FM8Sk3+UoI/svy0J9CS+e4PbJ/qsXxlE9k4/nQKI=
 github.com/aws/aws-sdk-go-v2/service/kinesis v1.6.0 h1:hb+NupVMUzINGUCfDs2+YqMkWKu47dBIQHpulM0XWh4=
 github.com/aws/aws-sdk-go-v2/service/kinesis v1.6.0/go.mod h1:9O7UG2pELnP0hq35+Gd7XDjOLBkg7tmgRQ0y14ZjoJI=
 github.com/aws/aws-sdk-go-v2/service/sso v1.3.3 h1:K2gCnGvAASpz+jqP9iyr+F/KNjmTYf8aWOtTQzhmZ5w=
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-github.com/aws/smithy-go v1.7.0 h1:+cLHMRrDZvQ4wk+KuQ9yH6eEg6KZEJ9RI2IkDqnygCg=
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@@ -135,7 +105,6 @@ github.com/jmespath/go-jmespath/internal/testify v1.5.1 h1:shLQSRRSCCPj3f2gpwzGw
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 gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

group.go

@@ -8,7 +8,14 @@ import (
 
 // Group interface used to manage which shard to process
 type Group interface {
-	Start(ctx context.Context, shardc chan types.Shard)
+	Start(ctx context.Context, shardc chan types.Shard) error
 	GetCheckpoint(streamName, shardID string) (string, error)
 	SetCheckpoint(streamName, shardID, sequenceNumber string) error
 }
+
+type CloseableGroup interface {
+	Group
+	// Allows shard processors to tell the group when the shard has been
+	// fully processed.  Should be called only once per shardID.
+	CloseShard(ctx context.Context, shardID string) error
+}

store/redis/options.go

@@ -1,6 +1,6 @@
 package redis
 
-import redis "github.com/go-redis/redis/v8"
+import redis "github.com/go-redis/redis/v9"
 
 // Option is used to override defaults when creating a new Redis checkpoint
 type Option func(*Checkpoint)

store/redis/redis.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"os"
 
-	redis "github.com/go-redis/redis/v8"
+	redis "github.com/go-redis/redis/v9"
 )
 
 const localhost = "127.0.0.1:6379"

store/redis/redis_test.go

@@ -4,7 +4,7 @@ import (
 	"testing"
 
 	"github.com/alicebob/miniredis"
-	redis "github.com/go-redis/redis/v8"
+	redis "github.com/go-redis/redis/v9"
 )
 
 func Test_CheckpointOptions(t *testing.T) {