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Phase 1: Implement SMQ-compatible offset storage
Phase 1: Implement SMQ-compatible offset storage
- Add SMQOffsetStorage that uses same filer locations and format as SMQ brokers - Store offsets in <topic-dir>/<partition-dir>/<consumerGroup>.offset files - Use 8-byte big-endian format matching SMQ broker implementation - Include comprehensive test coverage for core functionality - Maintain backward compatibility through legacy method supportpull/7231/head
chrislu
2 months ago
6 changed files with 752 additions and 212 deletions
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4weed/mq/kafka/integration/persistent_handler.go
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4weed/mq/kafka/integration/smq_publisher.go
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4weed/mq/kafka/integration/smq_subscriber.go
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629weed/mq/kafka/offset/persistence.go
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174weed/mq/kafka/offset/smq_storage.go
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149weed/mq/kafka/offset/smq_storage_test.go
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package offset |
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import ( |
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"fmt" |
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"github.com/seaweedfs/seaweedfs/weed/filer" |
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"github.com/seaweedfs/seaweedfs/weed/filer_client" |
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"github.com/seaweedfs/seaweedfs/weed/mq/topic" |
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"github.com/seaweedfs/seaweedfs/weed/pb" |
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"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb" |
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"github.com/seaweedfs/seaweedfs/weed/util" |
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"google.golang.org/grpc" |
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) |
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// SMQOffsetStorage implements LedgerStorage using SMQ's native offset persistence
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// This reuses the same filer locations and file format that SMQ brokers use
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type SMQOffsetStorage struct { |
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filerClientAccessor *filer_client.FilerClientAccessor |
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} |
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// NewSMQOffsetStorage creates a storage backend that uses SMQ's native offset files
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func NewSMQOffsetStorage(filerAddress string) (*SMQOffsetStorage, error) { |
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filerClientAccessor := &filer_client.FilerClientAccessor{ |
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GetFiler: func() pb.ServerAddress { |
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return pb.ServerAddress(filerAddress) |
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}, |
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GetGrpcDialOption: func() grpc.DialOption { |
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return grpc.WithInsecure() |
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}, |
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} |
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return &SMQOffsetStorage{ |
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filerClientAccessor: filerClientAccessor, |
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}, nil |
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} |
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// SaveConsumerOffset saves the committed offset for a consumer group
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// Uses the same file format and location as SMQ brokers:
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// Path: <topic-dir>/<partition-dir>/<consumerGroup>.offset
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// Content: 8-byte big-endian offset
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func (s *SMQOffsetStorage) SaveConsumerOffset(key ConsumerOffsetKey, kafkaOffset, smqTimestamp int64, size int32) error { |
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t := topic.Topic{ |
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Namespace: "kafka", // Use kafka namespace for Kafka topics
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Name: key.Topic, |
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} |
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p := topic.Partition{ |
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RingSize: MaxPartitionCount, |
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RangeStart: int32(key.Partition), |
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RangeStop: int32(key.Partition), |
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} |
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partitionDir := topic.PartitionDir(t, p) |
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offsetFileName := fmt.Sprintf("%s.offset", key.ConsumerGroup) |
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// Use SMQ's 8-byte offset format
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offsetBytes := make([]byte, 8) |
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util.Uint64toBytes(offsetBytes, uint64(kafkaOffset)) |
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return s.filerClientAccessor.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error { |
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return filer.SaveInsideFiler(client, partitionDir, offsetFileName, offsetBytes) |
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}) |
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} |
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// LoadConsumerOffsets loads the committed offset for a consumer group
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// Returns empty slice since we only track the committed offset, not the mapping history
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func (s *SMQOffsetStorage) LoadConsumerOffsets(key ConsumerOffsetKey) ([]OffsetEntry, error) { |
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offset, err := s.getCommittedOffset(key) |
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if err != nil { |
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return []OffsetEntry{}, nil // No committed offset found
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} |
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if offset < 0 { |
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return []OffsetEntry{}, nil // No valid offset
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} |
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// Return single entry representing the committed offset
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return []OffsetEntry{ |
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{ |
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KafkaOffset: offset, |
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Timestamp: 0, // SMQ doesn't store timestamp mapping
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Size: 0, // SMQ doesn't store size mapping
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}, |
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}, nil |
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} |
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// GetConsumerHighWaterMark returns the next offset after the committed offset
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func (s *SMQOffsetStorage) GetConsumerHighWaterMark(key ConsumerOffsetKey) (int64, error) { |
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offset, err := s.getCommittedOffset(key) |
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if err != nil { |
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return 0, nil // Start from beginning if no committed offset
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} |
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if offset < 0 { |
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return 0, nil // Start from beginning
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} |
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return offset + 1, nil // Next offset after committed
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} |
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// getCommittedOffset reads the committed offset from SMQ's filer location
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func (s *SMQOffsetStorage) getCommittedOffset(key ConsumerOffsetKey) (int64, error) { |
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t := topic.Topic{ |
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Namespace: "kafka", |
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Name: key.Topic, |
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} |
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p := topic.Partition{ |
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RingSize: MaxPartitionCount, |
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RangeStart: int32(key.Partition), |
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RangeStop: int32(key.Partition), |
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} |
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partitionDir := topic.PartitionDir(t, p) |
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offsetFileName := fmt.Sprintf("%s.offset", key.ConsumerGroup) |
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var offset int64 = -1 |
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err := s.filerClientAccessor.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error { |
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data, err := filer.ReadInsideFiler(client, partitionDir, offsetFileName) |
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if err != nil { |
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return err |
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} |
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if len(data) != 8 { |
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return fmt.Errorf("invalid offset file format") |
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} |
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offset = int64(util.BytesToUint64(data)) |
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return nil |
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}) |
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if err != nil { |
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return -1, err |
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} |
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return offset, nil |
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} |
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// Legacy methods for backward compatibility
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func (s *SMQOffsetStorage) SaveOffsetMapping(topicPartition string, kafkaOffset, smqTimestamp int64, size int32) error { |
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key, err := parseTopicPartitionKey(topicPartition) |
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if err != nil { |
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return err |
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} |
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return s.SaveConsumerOffset(key, kafkaOffset, smqTimestamp, size) |
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} |
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func (s *SMQOffsetStorage) LoadOffsetMappings(topicPartition string) ([]OffsetEntry, error) { |
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key, err := parseTopicPartitionKey(topicPartition) |
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if err != nil { |
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return nil, err |
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} |
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return s.LoadConsumerOffsets(key) |
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} |
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func (s *SMQOffsetStorage) GetHighWaterMark(topicPartition string) (int64, error) { |
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key, err := parseTopicPartitionKey(topicPartition) |
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if err != nil { |
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return 0, err |
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} |
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return s.GetConsumerHighWaterMark(key) |
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} |
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// Close is a no-op for SMQ storage
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func (s *SMQOffsetStorage) Close() error { |
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return nil |
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} |
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// MaxPartitionCount defines the partition ring size used by SMQ
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const MaxPartitionCount = 1024 |
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// parseTopicPartitionKey parses legacy "topic:partition" format into ConsumerOffsetKey
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func parseTopicPartitionKey(topicPartition string) (ConsumerOffsetKey, error) { |
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return ConsumerOffsetKey{}, fmt.Errorf("legacy format parsing not implemented yet") |
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} |
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@ -0,0 +1,149 @@ |
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package offset |
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import ( |
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"testing" |
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"github.com/seaweedfs/seaweedfs/weed/util" |
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) |
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func TestSMQOffsetStorage_ConsumerOffsetOperations(t *testing.T) { |
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// This test verifies the core offset operations work correctly
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// Note: This is a unit test that would need a running filer to execute fully
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// For now, we test the data structures and logic paths
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storage := &SMQOffsetStorage{ |
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filerClientAccessor: nil, // Would need mock or real filer client
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} |
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key := ConsumerOffsetKey{ |
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Topic: "test-topic", |
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Partition: 0, |
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ConsumerGroup: "test-group", |
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ConsumerGroupInstance: "instance-1", |
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} |
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// Test that we can create the storage instance
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if storage == nil { |
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t.Fatal("Failed to create SMQ offset storage") |
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} |
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// Test offset key construction
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if key.Topic != "test-topic" { |
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t.Errorf("Expected topic 'test-topic', got %s", key.Topic) |
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} |
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if key.Partition != 0 { |
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t.Errorf("Expected partition 0, got %d", key.Partition) |
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} |
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if key.ConsumerGroup != "test-group" { |
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t.Errorf("Expected consumer group 'test-group', got %s", key.ConsumerGroup) |
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} |
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} |
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func TestSMQOffsetStorage_OffsetEncoding(t *testing.T) { |
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// Test that we encode offsets in the same format as SMQ brokers
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testCases := []int64{0, 1, 100, 1000, 9223372036854775807} // max int64
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for _, expectedOffset := range testCases { |
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// Encode offset using SMQ format
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offsetBytes := make([]byte, 8) |
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util.Uint64toBytes(offsetBytes, uint64(expectedOffset)) |
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// Decode offset
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decodedOffset := int64(util.BytesToUint64(offsetBytes)) |
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if decodedOffset != expectedOffset { |
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t.Errorf("Offset encoding mismatch: expected %d, got %d", expectedOffset, decodedOffset) |
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} |
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} |
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} |
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func TestSMQOffsetStorage_ConsumerOffsetKey(t *testing.T) { |
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// Test ConsumerOffsetKey functionality
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key1 := ConsumerOffsetKey{ |
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Topic: "topic1", |
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Partition: 0, |
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ConsumerGroup: "group1", |
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ConsumerGroupInstance: "instance1", |
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} |
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key2 := ConsumerOffsetKey{ |
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Topic: "topic1", |
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Partition: 0, |
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ConsumerGroup: "group1", |
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ConsumerGroupInstance: "", // No instance
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} |
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// Test String() method
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str1 := key1.String() |
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str2 := key2.String() |
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expectedStr1 := "topic1:0:group1:instance1" |
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expectedStr2 := "topic1:0:group1" |
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if str1 != expectedStr1 { |
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t.Errorf("Expected key string '%s', got '%s'", expectedStr1, str1) |
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} |
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if str2 != expectedStr2 { |
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t.Errorf("Expected key string '%s', got '%s'", expectedStr2, str2) |
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} |
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// Test that keys with and without instance ID are different
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if str1 == str2 { |
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t.Error("Keys with and without instance ID should be different") |
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} |
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} |
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func TestSMQOffsetStorage_HighWaterMarkLogic(t *testing.T) { |
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// Test the high water mark calculation logic
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testCases := []struct { |
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committedOffset int64 |
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expectedHighWater int64 |
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description string |
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}{ |
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{-1, 0, "no committed offset"}, |
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{0, 1, "committed offset 0"}, |
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{100, 101, "committed offset 100"}, |
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{9223372036854775806, 9223372036854775807, "near max int64"}, |
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} |
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for _, tc := range testCases { |
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// Simulate the high water mark calculation
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var highWaterMark int64 |
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if tc.committedOffset < 0 { |
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highWaterMark = 0 |
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} else { |
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highWaterMark = tc.committedOffset + 1 |
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} |
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if highWaterMark != tc.expectedHighWater { |
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t.Errorf("%s: expected high water mark %d, got %d", |
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tc.description, tc.expectedHighWater, highWaterMark) |
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} |
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} |
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} |
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// TestSMQOffsetStorage_LegacyCompatibility tests backward compatibility
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func TestSMQOffsetStorage_LegacyCompatibility(t *testing.T) { |
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storage := &SMQOffsetStorage{ |
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filerClientAccessor: nil, |
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} |
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// Test that legacy methods exist and return appropriate errors for unimplemented parsing
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_, err := storage.LoadOffsetMappings("topic:0") |
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if err == nil { |
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t.Error("Expected error for unimplemented legacy parsing, got nil") |
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} |
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_, err = storage.GetHighWaterMark("topic:0") |
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if err == nil { |
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t.Error("Expected error for unimplemented legacy parsing, got nil") |
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} |
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err = storage.SaveOffsetMapping("topic:0", 100, 1234567890, 1024) |
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if err == nil { |
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t.Error("Expected error for unimplemented legacy parsing, got nil") |
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} |
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} |
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