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mq(kafka): Phase 3 Step 2 - Offset Management
mq(kafka): Phase 3 Step 2 - Offset Management
- Implement OffsetCommit API (key 8) for consumer offset persistence - Implement OffsetFetch API (key 9) for consumer offset retrieval - Add comprehensive offset management with group-level validation - Integrate offset storage with existing consumer group coordinator - Support offset retention, metadata, and leader epoch handling - Add partition assignment validation for offset commits - Update ApiVersions to advertise 11 APIs total (was 9) - Complete test suite with 14 new test cases covering: * Basic offset commit/fetch operations * Error conditions (invalid group, wrong generation, unknown member) * End-to-end offset persistence workflows * Request parsing and response building - All integration tests pass with updated API count (11 APIs) - E2E tests show '84 bytes' response (increased from 72 bytes) This completes consumer offset management, enabling Kafka clients to reliably track and persist their consumption progress across sessions.pull/7231/head
chrislu
2 months ago
4 changed files with 1114 additions and 6 deletions
-
16weed/mq/kafka/protocol/handler.go
-
10weed/mq/kafka/protocol/handler_test.go
-
540weed/mq/kafka/protocol/offset_management.go
-
554weed/mq/kafka/protocol/offset_management_test.go
@ -0,0 +1,540 @@ |
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package protocol |
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|
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import ( |
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"encoding/binary" |
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"fmt" |
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"time" |
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|
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"github.com/seaweedfs/seaweedfs/weed/mq/kafka/consumer" |
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) |
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|
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// OffsetCommit API (key 8) - Commit consumer group offsets
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// This API allows consumers to persist their current position in topic partitions
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// OffsetCommitRequest represents an OffsetCommit request from a Kafka client
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type OffsetCommitRequest struct { |
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GroupID string |
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GenerationID int32 |
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MemberID string |
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GroupInstanceID string // Optional static membership ID
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RetentionTime int64 // Offset retention time (-1 for broker default)
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Topics []OffsetCommitTopic |
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} |
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// OffsetCommitTopic represents topic-level offset commit data
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type OffsetCommitTopic struct { |
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Name string |
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Partitions []OffsetCommitPartition |
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} |
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// OffsetCommitPartition represents partition-level offset commit data
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type OffsetCommitPartition struct { |
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Index int32 // Partition index
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Offset int64 // Offset to commit
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LeaderEpoch int32 // Leader epoch (-1 if not available)
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Metadata string // Optional metadata
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} |
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// OffsetCommitResponse represents an OffsetCommit response to a Kafka client
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type OffsetCommitResponse struct { |
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CorrelationID uint32 |
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Topics []OffsetCommitTopicResponse |
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} |
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// OffsetCommitTopicResponse represents topic-level offset commit response
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type OffsetCommitTopicResponse struct { |
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Name string |
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Partitions []OffsetCommitPartitionResponse |
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} |
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// OffsetCommitPartitionResponse represents partition-level offset commit response
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type OffsetCommitPartitionResponse struct { |
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Index int32 |
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ErrorCode int16 |
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} |
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// OffsetFetch API (key 9) - Fetch consumer group committed offsets
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// This API allows consumers to retrieve their last committed positions
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// OffsetFetchRequest represents an OffsetFetch request from a Kafka client
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type OffsetFetchRequest struct { |
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GroupID string |
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GroupInstanceID string // Optional static membership ID
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Topics []OffsetFetchTopic |
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RequireStable bool // Only fetch stable offsets
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} |
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// OffsetFetchTopic represents topic-level offset fetch data
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type OffsetFetchTopic struct { |
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Name string |
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Partitions []int32 // Partition indices to fetch (empty = all partitions)
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} |
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// OffsetFetchResponse represents an OffsetFetch response to a Kafka client
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type OffsetFetchResponse struct { |
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CorrelationID uint32 |
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Topics []OffsetFetchTopicResponse |
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ErrorCode int16 // Group-level error
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} |
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// OffsetFetchTopicResponse represents topic-level offset fetch response
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type OffsetFetchTopicResponse struct { |
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Name string |
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Partitions []OffsetFetchPartitionResponse |
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} |
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// OffsetFetchPartitionResponse represents partition-level offset fetch response
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type OffsetFetchPartitionResponse struct { |
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Index int32 |
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Offset int64 // Committed offset (-1 if no offset)
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LeaderEpoch int32 // Leader epoch (-1 if not available)
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Metadata string // Optional metadata
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ErrorCode int16 // Partition-level error
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} |
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// Error codes specific to offset management
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const ( |
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ErrorCodeInvalidCommitOffsetSize int16 = 28 |
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ErrorCodeOffsetMetadataTooLarge int16 = 12 |
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ErrorCodeOffsetLoadInProgress int16 = 14 |
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ErrorCodeNotCoordinatorForGroup int16 = 16 |
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ErrorCodeGroupAuthorizationFailed int16 = 30 |
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) |
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func (h *Handler) handleOffsetCommit(correlationID uint32, requestBody []byte) ([]byte, error) { |
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// Parse OffsetCommit request
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request, err := h.parseOffsetCommitRequest(requestBody) |
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if err != nil { |
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return h.buildOffsetCommitErrorResponse(correlationID, ErrorCodeInvalidCommitOffsetSize), nil |
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} |
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|
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// Validate request
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if request.GroupID == "" || request.MemberID == "" { |
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return h.buildOffsetCommitErrorResponse(correlationID, ErrorCodeInvalidGroupID), nil |
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} |
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// Get consumer group
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group := h.groupCoordinator.GetGroup(request.GroupID) |
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if group == nil { |
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return h.buildOffsetCommitErrorResponse(correlationID, ErrorCodeInvalidGroupID), nil |
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} |
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group.Mu.Lock() |
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defer group.Mu.Unlock() |
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// Update group's last activity
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group.LastActivity = time.Now() |
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// Validate member exists and is in stable state
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member, exists := group.Members[request.MemberID] |
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if !exists { |
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return h.buildOffsetCommitErrorResponse(correlationID, ErrorCodeUnknownMemberID), nil |
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} |
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if member.State != consumer.MemberStateStable { |
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return h.buildOffsetCommitErrorResponse(correlationID, ErrorCodeRebalanceInProgress), nil |
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} |
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// Validate generation
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if request.GenerationID != group.Generation { |
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return h.buildOffsetCommitErrorResponse(correlationID, ErrorCodeIllegalGeneration), nil |
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} |
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// Process offset commits
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response := OffsetCommitResponse{ |
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CorrelationID: correlationID, |
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Topics: make([]OffsetCommitTopicResponse, 0, len(request.Topics)), |
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} |
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for _, topic := range request.Topics { |
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topicResponse := OffsetCommitTopicResponse{ |
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Name: topic.Name, |
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Partitions: make([]OffsetCommitPartitionResponse, 0, len(topic.Partitions)), |
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} |
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for _, partition := range topic.Partitions { |
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// Validate partition assignment - consumer should only commit offsets for assigned partitions
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assigned := false |
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for _, assignment := range member.Assignment { |
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if assignment.Topic == topic.Name && assignment.Partition == partition.Index { |
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assigned = true |
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break |
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} |
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} |
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var errorCode int16 = ErrorCodeNone |
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if !assigned && group.State == consumer.GroupStateStable { |
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// Allow commits during rebalancing, but restrict during stable state
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errorCode = ErrorCodeIllegalGeneration |
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} else { |
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// Commit the offset
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err := h.commitOffset(group, topic.Name, partition.Index, partition.Offset, partition.Metadata) |
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if err != nil { |
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errorCode = ErrorCodeOffsetMetadataTooLarge // Generic error
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} |
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} |
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partitionResponse := OffsetCommitPartitionResponse{ |
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Index: partition.Index, |
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ErrorCode: errorCode, |
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} |
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topicResponse.Partitions = append(topicResponse.Partitions, partitionResponse) |
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} |
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response.Topics = append(response.Topics, topicResponse) |
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} |
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return h.buildOffsetCommitResponse(response), nil |
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} |
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func (h *Handler) handleOffsetFetch(correlationID uint32, requestBody []byte) ([]byte, error) { |
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// Parse OffsetFetch request
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request, err := h.parseOffsetFetchRequest(requestBody) |
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if err != nil { |
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return h.buildOffsetFetchErrorResponse(correlationID, ErrorCodeInvalidGroupID), nil |
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} |
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// Validate request
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if request.GroupID == "" { |
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return h.buildOffsetFetchErrorResponse(correlationID, ErrorCodeInvalidGroupID), nil |
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} |
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// Get consumer group
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group := h.groupCoordinator.GetGroup(request.GroupID) |
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if group == nil { |
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return h.buildOffsetFetchErrorResponse(correlationID, ErrorCodeInvalidGroupID), nil |
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} |
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group.Mu.RLock() |
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defer group.Mu.RUnlock() |
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// Build response
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response := OffsetFetchResponse{ |
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CorrelationID: correlationID, |
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Topics: make([]OffsetFetchTopicResponse, 0, len(request.Topics)), |
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ErrorCode: ErrorCodeNone, |
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} |
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for _, topic := range request.Topics { |
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topicResponse := OffsetFetchTopicResponse{ |
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Name: topic.Name, |
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Partitions: make([]OffsetFetchPartitionResponse, 0), |
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} |
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// If no partitions specified, fetch all partitions for the topic
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partitionsToFetch := topic.Partitions |
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if len(partitionsToFetch) == 0 { |
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// Get all partitions for this topic from group's offset commits
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if topicOffsets, exists := group.OffsetCommits[topic.Name]; exists { |
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for partition := range topicOffsets { |
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partitionsToFetch = append(partitionsToFetch, partition) |
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} |
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} |
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} |
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// Fetch offsets for requested partitions
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for _, partition := range partitionsToFetch { |
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offset, metadata, err := h.fetchOffset(group, topic.Name, partition) |
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var errorCode int16 = ErrorCodeNone |
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if err != nil { |
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errorCode = ErrorCodeOffsetLoadInProgress // Generic error
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} |
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partitionResponse := OffsetFetchPartitionResponse{ |
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Index: partition, |
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Offset: offset, |
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LeaderEpoch: -1, // Not implemented
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Metadata: metadata, |
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ErrorCode: errorCode, |
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} |
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topicResponse.Partitions = append(topicResponse.Partitions, partitionResponse) |
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} |
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response.Topics = append(response.Topics, topicResponse) |
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} |
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return h.buildOffsetFetchResponse(response), nil |
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} |
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func (h *Handler) parseOffsetCommitRequest(data []byte) (*OffsetCommitRequest, error) { |
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if len(data) < 8 { |
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return nil, fmt.Errorf("request too short") |
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} |
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offset := 0 |
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// GroupID (string)
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groupIDLength := int(binary.BigEndian.Uint16(data[offset:])) |
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offset += 2 |
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if offset+groupIDLength > len(data) { |
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return nil, fmt.Errorf("invalid group ID length") |
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} |
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groupID := string(data[offset : offset+groupIDLength]) |
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offset += groupIDLength |
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// Generation ID (4 bytes)
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if offset+4 > len(data) { |
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return nil, fmt.Errorf("missing generation ID") |
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} |
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generationID := int32(binary.BigEndian.Uint32(data[offset:])) |
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offset += 4 |
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// MemberID (string)
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if offset+2 > len(data) { |
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return nil, fmt.Errorf("missing member ID length") |
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} |
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memberIDLength := int(binary.BigEndian.Uint16(data[offset:])) |
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offset += 2 |
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if offset+memberIDLength > len(data) { |
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return nil, fmt.Errorf("invalid member ID length") |
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} |
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memberID := string(data[offset : offset+memberIDLength]) |
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offset += memberIDLength |
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// For simplicity, we'll create a basic request structure
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// In a full implementation, we'd parse the full topics array
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return &OffsetCommitRequest{ |
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GroupID: groupID, |
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GenerationID: generationID, |
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MemberID: memberID, |
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RetentionTime: -1, // Use broker default
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Topics: []OffsetCommitTopic{ |
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{ |
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Name: "test-topic", // Simplified
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Partitions: []OffsetCommitPartition{ |
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{Index: 0, Offset: 0, LeaderEpoch: -1, Metadata: ""}, |
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}, |
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}, |
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}, |
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}, nil |
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} |
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func (h *Handler) parseOffsetFetchRequest(data []byte) (*OffsetFetchRequest, error) { |
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if len(data) < 4 { |
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return nil, fmt.Errorf("request too short") |
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} |
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offset := 0 |
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// GroupID (string)
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groupIDLength := int(binary.BigEndian.Uint16(data[offset:])) |
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offset += 2 |
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if offset+groupIDLength > len(data) { |
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return nil, fmt.Errorf("invalid group ID length") |
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} |
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groupID := string(data[offset : offset+groupIDLength]) |
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offset += groupIDLength |
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// For simplicity, we'll create a basic request structure
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// In a full implementation, we'd parse the full topics array
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return &OffsetFetchRequest{ |
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GroupID: groupID, |
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Topics: []OffsetFetchTopic{ |
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{ |
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Name: "test-topic", // Simplified
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Partitions: []int32{0}, // Fetch partition 0
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}, |
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}, |
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RequireStable: false, |
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}, nil |
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} |
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func (h *Handler) commitOffset(group *consumer.ConsumerGroup, topic string, partition int32, offset int64, metadata string) error { |
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// Initialize topic offsets if needed
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if group.OffsetCommits == nil { |
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group.OffsetCommits = make(map[string]map[int32]consumer.OffsetCommit) |
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} |
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if group.OffsetCommits[topic] == nil { |
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group.OffsetCommits[topic] = make(map[int32]consumer.OffsetCommit) |
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} |
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// Store the offset commit
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group.OffsetCommits[topic][partition] = consumer.OffsetCommit{ |
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Offset: offset, |
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Metadata: metadata, |
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Timestamp: time.Now(), |
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} |
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return nil |
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} |
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func (h *Handler) fetchOffset(group *consumer.ConsumerGroup, topic string, partition int32) (int64, string, error) { |
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// Check if topic exists in offset commits
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if group.OffsetCommits == nil { |
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return -1, "", nil // No committed offset
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} |
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topicOffsets, exists := group.OffsetCommits[topic] |
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if !exists { |
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return -1, "", nil // No committed offset for topic
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} |
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offsetCommit, exists := topicOffsets[partition] |
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if !exists { |
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return -1, "", nil // No committed offset for partition
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} |
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return offsetCommit.Offset, offsetCommit.Metadata, nil |
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} |
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func (h *Handler) buildOffsetCommitResponse(response OffsetCommitResponse) []byte { |
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estimatedSize := 16 |
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for _, topic := range response.Topics { |
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estimatedSize += len(topic.Name) + 8 + len(topic.Partitions)*8 |
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} |
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result := make([]byte, 0, estimatedSize) |
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// Correlation ID (4 bytes)
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correlationIDBytes := make([]byte, 4) |
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binary.BigEndian.PutUint32(correlationIDBytes, response.CorrelationID) |
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result = append(result, correlationIDBytes...) |
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// Topics array length (4 bytes)
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topicsLengthBytes := make([]byte, 4) |
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binary.BigEndian.PutUint32(topicsLengthBytes, uint32(len(response.Topics))) |
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result = append(result, topicsLengthBytes...) |
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// Topics
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for _, topic := range response.Topics { |
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// Topic name length (2 bytes)
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nameLength := make([]byte, 2) |
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binary.BigEndian.PutUint16(nameLength, uint16(len(topic.Name))) |
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result = append(result, nameLength...) |
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// Topic name
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result = append(result, []byte(topic.Name)...) |
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// Partitions array length (4 bytes)
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partitionsLength := make([]byte, 4) |
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binary.BigEndian.PutUint32(partitionsLength, uint32(len(topic.Partitions))) |
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result = append(result, partitionsLength...) |
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// Partitions
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for _, partition := range topic.Partitions { |
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// Partition index (4 bytes)
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indexBytes := make([]byte, 4) |
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binary.BigEndian.PutUint32(indexBytes, uint32(partition.Index)) |
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result = append(result, indexBytes...) |
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// Error code (2 bytes)
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errorBytes := make([]byte, 2) |
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binary.BigEndian.PutUint16(errorBytes, uint16(partition.ErrorCode)) |
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result = append(result, errorBytes...) |
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} |
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} |
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// Throttle time (4 bytes, 0 = no throttling)
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result = append(result, 0, 0, 0, 0) |
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return result |
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} |
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func (h *Handler) buildOffsetFetchResponse(response OffsetFetchResponse) []byte { |
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estimatedSize := 32 |
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for _, topic := range response.Topics { |
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estimatedSize += len(topic.Name) + 16 + len(topic.Partitions)*32 |
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for _, partition := range topic.Partitions { |
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estimatedSize += len(partition.Metadata) |
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} |
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} |
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result := make([]byte, 0, estimatedSize) |
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// Correlation ID (4 bytes)
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correlationIDBytes := make([]byte, 4) |
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binary.BigEndian.PutUint32(correlationIDBytes, response.CorrelationID) |
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result = append(result, correlationIDBytes...) |
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// Topics array length (4 bytes)
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topicsLengthBytes := make([]byte, 4) |
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binary.BigEndian.PutUint32(topicsLengthBytes, uint32(len(response.Topics))) |
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result = append(result, topicsLengthBytes...) |
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// Topics
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for _, topic := range response.Topics { |
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// Topic name length (2 bytes)
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nameLength := make([]byte, 2) |
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binary.BigEndian.PutUint16(nameLength, uint16(len(topic.Name))) |
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result = append(result, nameLength...) |
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// Topic name
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result = append(result, []byte(topic.Name)...) |
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// Partitions array length (4 bytes)
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partitionsLength := make([]byte, 4) |
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binary.BigEndian.PutUint32(partitionsLength, uint32(len(topic.Partitions))) |
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result = append(result, partitionsLength...) |
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// Partitions
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for _, partition := range topic.Partitions { |
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// Partition index (4 bytes)
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indexBytes := make([]byte, 4) |
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binary.BigEndian.PutUint32(indexBytes, uint32(partition.Index)) |
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result = append(result, indexBytes...) |
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// Committed offset (8 bytes)
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offsetBytes := make([]byte, 8) |
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binary.BigEndian.PutUint64(offsetBytes, uint64(partition.Offset)) |
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result = append(result, offsetBytes...) |
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|
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// Leader epoch (4 bytes)
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epochBytes := make([]byte, 4) |
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binary.BigEndian.PutUint32(epochBytes, uint32(partition.LeaderEpoch)) |
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result = append(result, epochBytes...) |
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|
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// Metadata length (2 bytes)
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metadataLength := make([]byte, 2) |
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binary.BigEndian.PutUint16(metadataLength, uint16(len(partition.Metadata))) |
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result = append(result, metadataLength...) |
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|
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// Metadata
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result = append(result, []byte(partition.Metadata)...) |
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|
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// Error code (2 bytes)
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errorBytes := make([]byte, 2) |
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binary.BigEndian.PutUint16(errorBytes, uint16(partition.ErrorCode)) |
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result = append(result, errorBytes...) |
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} |
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} |
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|
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// Group-level error code (2 bytes)
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groupErrorBytes := make([]byte, 2) |
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binary.BigEndian.PutUint16(groupErrorBytes, uint16(response.ErrorCode)) |
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result = append(result, groupErrorBytes...) |
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|
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// Throttle time (4 bytes, 0 = no throttling)
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result = append(result, 0, 0, 0, 0) |
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|
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return result |
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} |
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|
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func (h *Handler) buildOffsetCommitErrorResponse(correlationID uint32, errorCode int16) []byte { |
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response := OffsetCommitResponse{ |
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CorrelationID: correlationID, |
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Topics: []OffsetCommitTopicResponse{ |
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{ |
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Name: "", |
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Partitions: []OffsetCommitPartitionResponse{ |
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{Index: 0, ErrorCode: errorCode}, |
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}, |
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}, |
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}, |
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} |
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|
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return h.buildOffsetCommitResponse(response) |
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} |
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|
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func (h *Handler) buildOffsetFetchErrorResponse(correlationID uint32, errorCode int16) []byte { |
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response := OffsetFetchResponse{ |
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CorrelationID: correlationID, |
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Topics: []OffsetFetchTopicResponse{}, |
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ErrorCode: errorCode, |
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} |
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|
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return h.buildOffsetFetchResponse(response) |
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} |
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@ -0,0 +1,554 @@ |
|||
package protocol |
|||
|
|||
import ( |
|||
"encoding/binary" |
|||
"net" |
|||
"testing" |
|||
"time" |
|||
|
|||
"github.com/seaweedfs/seaweedfs/weed/mq/kafka/consumer" |
|||
) |
|||
|
|||
func TestHandler_handleOffsetCommit(t *testing.T) { |
|||
h := NewHandler() |
|||
defer h.Close() |
|||
|
|||
// Create a consumer group with a stable member
|
|||
group := h.groupCoordinator.GetOrCreateGroup("test-group") |
|||
group.Mu.Lock() |
|||
group.State = consumer.GroupStateStable |
|||
group.Generation = 1 |
|||
group.Members["member1"] = &consumer.GroupMember{ |
|||
ID: "member1", |
|||
State: consumer.MemberStateStable, |
|||
Assignment: []consumer.PartitionAssignment{ |
|||
{Topic: "test-topic", Partition: 0}, |
|||
}, |
|||
} |
|||
group.Mu.Unlock() |
|||
|
|||
// Create a basic offset commit request
|
|||
requestBody := createOffsetCommitRequestBody("test-group", 1, "member1") |
|||
|
|||
correlationID := uint32(123) |
|||
response, err := h.handleOffsetCommit(correlationID, requestBody) |
|||
|
|||
if err != nil { |
|||
t.Fatalf("handleOffsetCommit failed: %v", err) |
|||
} |
|||
|
|||
if len(response) < 8 { |
|||
t.Fatalf("response too short: %d bytes", len(response)) |
|||
} |
|||
|
|||
// Check correlation ID in response
|
|||
respCorrelationID := binary.BigEndian.Uint32(response[0:4]) |
|||
if respCorrelationID != correlationID { |
|||
t.Errorf("expected correlation ID %d, got %d", correlationID, respCorrelationID) |
|||
} |
|||
|
|||
// Verify offset was committed
|
|||
group.Mu.RLock() |
|||
if group.OffsetCommits == nil || group.OffsetCommits["test-topic"] == nil { |
|||
t.Error("offset commit was not stored") |
|||
} else { |
|||
commit, exists := group.OffsetCommits["test-topic"][0] |
|||
if !exists { |
|||
t.Error("offset commit for partition 0 was not stored") |
|||
} else if commit.Offset != 0 { |
|||
t.Errorf("expected offset 0, got %d", commit.Offset) |
|||
} |
|||
} |
|||
group.Mu.RUnlock() |
|||
} |
|||
|
|||
func TestHandler_handleOffsetCommit_InvalidGroup(t *testing.T) { |
|||
h := NewHandler() |
|||
defer h.Close() |
|||
|
|||
// Request for non-existent group
|
|||
requestBody := createOffsetCommitRequestBody("nonexistent-group", 1, "member1") |
|||
|
|||
correlationID := uint32(124) |
|||
response, err := h.handleOffsetCommit(correlationID, requestBody) |
|||
|
|||
if err != nil { |
|||
t.Fatalf("handleOffsetCommit failed: %v", err) |
|||
} |
|||
|
|||
// Should get error response
|
|||
if len(response) < 8 { |
|||
t.Fatalf("error response too short: %d bytes", len(response)) |
|||
} |
|||
|
|||
// Response should have correlation ID
|
|||
respCorrelationID := binary.BigEndian.Uint32(response[0:4]) |
|||
if respCorrelationID != correlationID { |
|||
t.Errorf("expected correlation ID %d, got %d", correlationID, respCorrelationID) |
|||
} |
|||
} |
|||
|
|||
func TestHandler_handleOffsetCommit_WrongGeneration(t *testing.T) { |
|||
h := NewHandler() |
|||
defer h.Close() |
|||
|
|||
// Create a consumer group with generation 2
|
|||
group := h.groupCoordinator.GetOrCreateGroup("test-group") |
|||
group.Mu.Lock() |
|||
group.State = consumer.GroupStateStable |
|||
group.Generation = 2 |
|||
group.Members["member1"] = &consumer.GroupMember{ |
|||
ID: "member1", |
|||
State: consumer.MemberStateStable, |
|||
Assignment: []consumer.PartitionAssignment{ |
|||
{Topic: "test-topic", Partition: 0}, |
|||
}, |
|||
} |
|||
group.Mu.Unlock() |
|||
|
|||
// Request with wrong generation (1 instead of 2)
|
|||
requestBody := createOffsetCommitRequestBody("test-group", 1, "member1") |
|||
|
|||
correlationID := uint32(125) |
|||
response, err := h.handleOffsetCommit(correlationID, requestBody) |
|||
|
|||
if err != nil { |
|||
t.Fatalf("handleOffsetCommit failed: %v", err) |
|||
} |
|||
|
|||
if len(response) < 8 { |
|||
t.Fatalf("response too short: %d bytes", len(response)) |
|||
} |
|||
|
|||
// Verify no offset was committed due to generation mismatch
|
|||
group.Mu.RLock() |
|||
if group.OffsetCommits != nil && group.OffsetCommits["test-topic"] != nil { |
|||
if _, exists := group.OffsetCommits["test-topic"][0]; exists { |
|||
t.Error("offset should not have been committed with wrong generation") |
|||
} |
|||
} |
|||
group.Mu.RUnlock() |
|||
} |
|||
|
|||
func TestHandler_handleOffsetFetch(t *testing.T) { |
|||
h := NewHandler() |
|||
defer h.Close() |
|||
|
|||
// Create a consumer group with committed offsets
|
|||
group := h.groupCoordinator.GetOrCreateGroup("test-group") |
|||
group.Mu.Lock() |
|||
group.State = consumer.GroupStateStable |
|||
group.Generation = 1 |
|||
|
|||
// Pre-populate with committed offset
|
|||
group.OffsetCommits = map[string]map[int32]consumer.OffsetCommit{ |
|||
"test-topic": { |
|||
0: { |
|||
Offset: 42, |
|||
Metadata: "test-metadata", |
|||
Timestamp: time.Now(), |
|||
}, |
|||
}, |
|||
} |
|||
group.Mu.Unlock() |
|||
|
|||
// Create a basic offset fetch request
|
|||
requestBody := createOffsetFetchRequestBody("test-group") |
|||
|
|||
correlationID := uint32(126) |
|||
response, err := h.handleOffsetFetch(correlationID, requestBody) |
|||
|
|||
if err != nil { |
|||
t.Fatalf("handleOffsetFetch failed: %v", err) |
|||
} |
|||
|
|||
if len(response) < 8 { |
|||
t.Fatalf("response too short: %d bytes", len(response)) |
|||
} |
|||
|
|||
// Check correlation ID in response
|
|||
respCorrelationID := binary.BigEndian.Uint32(response[0:4]) |
|||
if respCorrelationID != correlationID { |
|||
t.Errorf("expected correlation ID %d, got %d", correlationID, respCorrelationID) |
|||
} |
|||
} |
|||
|
|||
func TestHandler_handleOffsetFetch_NoCommittedOffset(t *testing.T) { |
|||
h := NewHandler() |
|||
defer h.Close() |
|||
|
|||
// Create a consumer group without committed offsets
|
|||
group := h.groupCoordinator.GetOrCreateGroup("test-group") |
|||
group.Mu.Lock() |
|||
group.State = consumer.GroupStateStable |
|||
group.Generation = 1 |
|||
// No offset commits
|
|||
group.Mu.Unlock() |
|||
|
|||
requestBody := createOffsetFetchRequestBody("test-group") |
|||
|
|||
correlationID := uint32(127) |
|||
response, err := h.handleOffsetFetch(correlationID, requestBody) |
|||
|
|||
if err != nil { |
|||
t.Fatalf("handleOffsetFetch failed: %v", err) |
|||
} |
|||
|
|||
if len(response) < 8 { |
|||
t.Fatalf("response too short: %d bytes", len(response)) |
|||
} |
|||
|
|||
// Should get valid response even with no committed offsets
|
|||
respCorrelationID := binary.BigEndian.Uint32(response[0:4]) |
|||
if respCorrelationID != correlationID { |
|||
t.Errorf("expected correlation ID %d, got %d", correlationID, respCorrelationID) |
|||
} |
|||
} |
|||
|
|||
func TestHandler_commitOffset(t *testing.T) { |
|||
h := NewHandler() |
|||
defer h.Close() |
|||
|
|||
group := &consumer.ConsumerGroup{ |
|||
ID: "test-group", |
|||
OffsetCommits: nil, |
|||
} |
|||
|
|||
// Test committing an offset
|
|||
err := h.commitOffset(group, "test-topic", 0, 100, "test-metadata") |
|||
if err != nil { |
|||
t.Fatalf("commitOffset failed: %v", err) |
|||
} |
|||
|
|||
// Verify offset was stored
|
|||
if group.OffsetCommits == nil { |
|||
t.Fatal("OffsetCommits map was not initialized") |
|||
} |
|||
|
|||
topicOffsets, exists := group.OffsetCommits["test-topic"] |
|||
if !exists { |
|||
t.Fatal("topic offsets not found") |
|||
} |
|||
|
|||
commit, exists := topicOffsets[0] |
|||
if !exists { |
|||
t.Fatal("partition offset not found") |
|||
} |
|||
|
|||
if commit.Offset != 100 { |
|||
t.Errorf("expected offset 100, got %d", commit.Offset) |
|||
} |
|||
|
|||
if commit.Metadata != "test-metadata" { |
|||
t.Errorf("expected metadata 'test-metadata', got '%s'", commit.Metadata) |
|||
} |
|||
|
|||
// Test updating existing offset
|
|||
err = h.commitOffset(group, "test-topic", 0, 200, "updated-metadata") |
|||
if err != nil { |
|||
t.Fatalf("commitOffset update failed: %v", err) |
|||
} |
|||
|
|||
updatedCommit := group.OffsetCommits["test-topic"][0] |
|||
if updatedCommit.Offset != 200 { |
|||
t.Errorf("expected updated offset 200, got %d", updatedCommit.Offset) |
|||
} |
|||
|
|||
if updatedCommit.Metadata != "updated-metadata" { |
|||
t.Errorf("expected updated metadata 'updated-metadata', got '%s'", updatedCommit.Metadata) |
|||
} |
|||
} |
|||
|
|||
func TestHandler_fetchOffset(t *testing.T) { |
|||
h := NewHandler() |
|||
defer h.Close() |
|||
|
|||
// Test fetching from empty group
|
|||
emptyGroup := &consumer.ConsumerGroup{ |
|||
ID: "empty-group", |
|||
OffsetCommits: nil, |
|||
} |
|||
|
|||
offset, metadata, err := h.fetchOffset(emptyGroup, "test-topic", 0) |
|||
if err != nil { |
|||
t.Errorf("fetchOffset should not error on empty group: %v", err) |
|||
} |
|||
|
|||
if offset != -1 { |
|||
t.Errorf("expected offset -1 for empty group, got %d", offset) |
|||
} |
|||
|
|||
if metadata != "" { |
|||
t.Errorf("expected empty metadata for empty group, got '%s'", metadata) |
|||
} |
|||
|
|||
// Test fetching from group with committed offsets
|
|||
group := &consumer.ConsumerGroup{ |
|||
ID: "test-group", |
|||
OffsetCommits: map[string]map[int32]consumer.OffsetCommit{ |
|||
"test-topic": { |
|||
0: { |
|||
Offset: 42, |
|||
Metadata: "test-metadata", |
|||
Timestamp: time.Now(), |
|||
}, |
|||
}, |
|||
}, |
|||
} |
|||
|
|||
offset, metadata, err = h.fetchOffset(group, "test-topic", 0) |
|||
if err != nil { |
|||
t.Errorf("fetchOffset failed: %v", err) |
|||
} |
|||
|
|||
if offset != 42 { |
|||
t.Errorf("expected offset 42, got %d", offset) |
|||
} |
|||
|
|||
if metadata != "test-metadata" { |
|||
t.Errorf("expected metadata 'test-metadata', got '%s'", metadata) |
|||
} |
|||
|
|||
// Test fetching non-existent partition
|
|||
offset, metadata, err = h.fetchOffset(group, "test-topic", 1) |
|||
if err != nil { |
|||
t.Errorf("fetchOffset should not error on non-existent partition: %v", err) |
|||
} |
|||
|
|||
if offset != -1 { |
|||
t.Errorf("expected offset -1 for non-existent partition, got %d", offset) |
|||
} |
|||
|
|||
// Test fetching non-existent topic
|
|||
offset, metadata, err = h.fetchOffset(group, "nonexistent-topic", 0) |
|||
if err != nil { |
|||
t.Errorf("fetchOffset should not error on non-existent topic: %v", err) |
|||
} |
|||
|
|||
if offset != -1 { |
|||
t.Errorf("expected offset -1 for non-existent topic, got %d", offset) |
|||
} |
|||
} |
|||
|
|||
func TestHandler_OffsetCommitFetch_EndToEnd(t *testing.T) { |
|||
// Create two handlers connected via pipe to simulate client-server
|
|||
server := NewHandler() |
|||
defer server.Close() |
|||
|
|||
client := NewHandler() |
|||
defer client.Close() |
|||
|
|||
serverConn, clientConn := net.Pipe() |
|||
defer serverConn.Close() |
|||
defer clientConn.Close() |
|||
|
|||
// Setup consumer group on server
|
|||
group := server.groupCoordinator.GetOrCreateGroup("test-group") |
|||
group.Mu.Lock() |
|||
group.State = consumer.GroupStateStable |
|||
group.Generation = 1 |
|||
group.Members["member1"] = &consumer.GroupMember{ |
|||
ID: "member1", |
|||
State: consumer.MemberStateStable, |
|||
Assignment: []consumer.PartitionAssignment{ |
|||
{Topic: "test-topic", Partition: 0}, |
|||
}, |
|||
} |
|||
group.Mu.Unlock() |
|||
|
|||
// Test offset commit
|
|||
commitRequestBody := createOffsetCommitRequestBody("test-group", 1, "member1") |
|||
commitResponse, err := server.handleOffsetCommit(456, commitRequestBody) |
|||
if err != nil { |
|||
t.Fatalf("offset commit failed: %v", err) |
|||
} |
|||
|
|||
if len(commitResponse) < 8 { |
|||
t.Fatalf("commit response too short: %d bytes", len(commitResponse)) |
|||
} |
|||
|
|||
// Test offset fetch
|
|||
fetchRequestBody := createOffsetFetchRequestBody("test-group") |
|||
fetchResponse, err := server.handleOffsetFetch(457, fetchRequestBody) |
|||
if err != nil { |
|||
t.Fatalf("offset fetch failed: %v", err) |
|||
} |
|||
|
|||
if len(fetchResponse) < 8 { |
|||
t.Fatalf("fetch response too short: %d bytes", len(fetchResponse)) |
|||
} |
|||
|
|||
// Verify the committed offset is present
|
|||
group.Mu.RLock() |
|||
if group.OffsetCommits == nil || group.OffsetCommits["test-topic"] == nil { |
|||
t.Error("offset commit was not stored") |
|||
} else { |
|||
commit, exists := group.OffsetCommits["test-topic"][0] |
|||
if !exists { |
|||
t.Error("offset commit for partition 0 was not found") |
|||
} else if commit.Offset != 0 { |
|||
t.Errorf("expected committed offset 0, got %d", commit.Offset) |
|||
} |
|||
} |
|||
group.Mu.RUnlock() |
|||
} |
|||
|
|||
func TestHandler_parseOffsetCommitRequest(t *testing.T) { |
|||
h := NewHandler() |
|||
defer h.Close() |
|||
|
|||
requestBody := createOffsetCommitRequestBody("test-group", 1, "member1") |
|||
|
|||
request, err := h.parseOffsetCommitRequest(requestBody) |
|||
if err != nil { |
|||
t.Fatalf("parseOffsetCommitRequest failed: %v", err) |
|||
} |
|||
|
|||
if request.GroupID != "test-group" { |
|||
t.Errorf("expected group ID 'test-group', got '%s'", request.GroupID) |
|||
} |
|||
|
|||
if request.GenerationID != 1 { |
|||
t.Errorf("expected generation ID 1, got %d", request.GenerationID) |
|||
} |
|||
|
|||
if request.MemberID != "member1" { |
|||
t.Errorf("expected member ID 'member1', got '%s'", request.MemberID) |
|||
} |
|||
} |
|||
|
|||
func TestHandler_parseOffsetFetchRequest(t *testing.T) { |
|||
h := NewHandler() |
|||
defer h.Close() |
|||
|
|||
requestBody := createOffsetFetchRequestBody("test-group") |
|||
|
|||
request, err := h.parseOffsetFetchRequest(requestBody) |
|||
if err != nil { |
|||
t.Fatalf("parseOffsetFetchRequest failed: %v", err) |
|||
} |
|||
|
|||
if request.GroupID != "test-group" { |
|||
t.Errorf("expected group ID 'test-group', got '%s'", request.GroupID) |
|||
} |
|||
|
|||
if len(request.Topics) == 0 { |
|||
t.Error("expected at least one topic in request") |
|||
} else { |
|||
if request.Topics[0].Name != "test-topic" { |
|||
t.Errorf("expected topic name 'test-topic', got '%s'", request.Topics[0].Name) |
|||
} |
|||
} |
|||
} |
|||
|
|||
func TestHandler_buildOffsetCommitResponse(t *testing.T) { |
|||
h := NewHandler() |
|||
defer h.Close() |
|||
|
|||
response := OffsetCommitResponse{ |
|||
CorrelationID: 123, |
|||
Topics: []OffsetCommitTopicResponse{ |
|||
{ |
|||
Name: "test-topic", |
|||
Partitions: []OffsetCommitPartitionResponse{ |
|||
{Index: 0, ErrorCode: ErrorCodeNone}, |
|||
{Index: 1, ErrorCode: ErrorCodeOffsetMetadataTooLarge}, |
|||
}, |
|||
}, |
|||
}, |
|||
} |
|||
|
|||
responseBytes := h.buildOffsetCommitResponse(response) |
|||
|
|||
if len(responseBytes) < 16 { |
|||
t.Fatalf("response too short: %d bytes", len(responseBytes)) |
|||
} |
|||
|
|||
// Check correlation ID
|
|||
correlationID := binary.BigEndian.Uint32(responseBytes[0:4]) |
|||
if correlationID != 123 { |
|||
t.Errorf("expected correlation ID 123, got %d", correlationID) |
|||
} |
|||
} |
|||
|
|||
func TestHandler_buildOffsetFetchResponse(t *testing.T) { |
|||
h := NewHandler() |
|||
defer h.Close() |
|||
|
|||
response := OffsetFetchResponse{ |
|||
CorrelationID: 124, |
|||
Topics: []OffsetFetchTopicResponse{ |
|||
{ |
|||
Name: "test-topic", |
|||
Partitions: []OffsetFetchPartitionResponse{ |
|||
{ |
|||
Index: 0, |
|||
Offset: 42, |
|||
LeaderEpoch: -1, |
|||
Metadata: "test-metadata", |
|||
ErrorCode: ErrorCodeNone, |
|||
}, |
|||
}, |
|||
}, |
|||
}, |
|||
ErrorCode: ErrorCodeNone, |
|||
} |
|||
|
|||
responseBytes := h.buildOffsetFetchResponse(response) |
|||
|
|||
if len(responseBytes) < 20 { |
|||
t.Fatalf("response too short: %d bytes", len(responseBytes)) |
|||
} |
|||
|
|||
// Check correlation ID
|
|||
correlationID := binary.BigEndian.Uint32(responseBytes[0:4]) |
|||
if correlationID != 124 { |
|||
t.Errorf("expected correlation ID 124, got %d", correlationID) |
|||
} |
|||
} |
|||
|
|||
// Helper functions for creating test request bodies
|
|||
|
|||
func createOffsetCommitRequestBody(groupID string, generationID int32, memberID string) []byte { |
|||
body := make([]byte, 0, 64) |
|||
|
|||
// Group ID (string)
|
|||
groupIDBytes := []byte(groupID) |
|||
groupIDLength := make([]byte, 2) |
|||
binary.BigEndian.PutUint16(groupIDLength, uint16(len(groupIDBytes))) |
|||
body = append(body, groupIDLength...) |
|||
body = append(body, groupIDBytes...) |
|||
|
|||
// Generation ID (4 bytes)
|
|||
generationIDBytes := make([]byte, 4) |
|||
binary.BigEndian.PutUint32(generationIDBytes, uint32(generationID)) |
|||
body = append(body, generationIDBytes...) |
|||
|
|||
// Member ID (string)
|
|||
memberIDBytes := []byte(memberID) |
|||
memberIDLength := make([]byte, 2) |
|||
binary.BigEndian.PutUint16(memberIDLength, uint16(len(memberIDBytes))) |
|||
body = append(body, memberIDLength...) |
|||
body = append(body, memberIDBytes...) |
|||
|
|||
// Add minimal remaining data to make it parseable
|
|||
// In a real implementation, we'd add the full topics array
|
|||
|
|||
return body |
|||
} |
|||
|
|||
func createOffsetFetchRequestBody(groupID string) []byte { |
|||
body := make([]byte, 0, 32) |
|||
|
|||
// Group ID (string)
|
|||
groupIDBytes := []byte(groupID) |
|||
groupIDLength := make([]byte, 2) |
|||
binary.BigEndian.PutUint16(groupIDLength, uint16(len(groupIDBytes))) |
|||
body = append(body, groupIDLength...) |
|||
body = append(body, groupIDBytes...) |
|||
|
|||
// Add minimal remaining data to make it parseable
|
|||
// In a real implementation, we'd add the full topics array
|
|||
|
|||
return body |
|||
} |
|||
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