milvus/internal/streamingnode/server/flusher/flusherimpl/msg_handler_impl.go

// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package flusherimpl

import (
	"context"

	"github.com/cockroachdb/errors"
	"github.com/samber/lo"
	"go.uber.org/zap"

	"github.com/milvus-io/milvus-proto/go-api/v2/msgpb"
	"github.com/milvus-io/milvus/internal/distributed/streaming"
	"github.com/milvus-io/milvus/internal/flushcommon/util"
	"github.com/milvus-io/milvus/internal/flushcommon/writebuffer"
	"github.com/milvus-io/milvus/internal/streamingnode/server/resource"
	"github.com/milvus-io/milvus/pkg/v2/log"
	"github.com/milvus-io/milvus/pkg/v2/proto/datapb"
	"github.com/milvus-io/milvus/pkg/v2/proto/internalpb"
	"github.com/milvus-io/milvus/pkg/v2/streaming/util/message"
	"github.com/milvus-io/milvus/pkg/v2/streaming/util/types"
	"github.com/milvus-io/milvus/pkg/v2/util/funcutil"
	"github.com/milvus-io/milvus/pkg/v2/util/merr"
	"github.com/milvus-io/milvus/pkg/v2/util/retry"
)

func newMsgHandler(wbMgr writebuffer.BufferManager) *msgHandlerImpl {
	return &msgHandlerImpl{
		wbMgr: wbMgr,
	}
}

type msgHandlerImpl struct {
	wbMgr writebuffer.BufferManager
}

func (impl *msgHandlerImpl) HandleCreateSegment(ctx context.Context, createSegmentMsg message.ImmutableCreateSegmentMessageV2) error {
	vchannel := createSegmentMsg.VChannel()
	h := createSegmentMsg.Header()
	if err := impl.createNewGrowingSegment(ctx, vchannel, h); err != nil {
		return err
	}
	logger := log.With(log.FieldMessage(createSegmentMsg))
	if err := impl.wbMgr.CreateNewGrowingSegment(ctx, vchannel, h.PartitionId, h.SegmentId); err != nil {
		logger.Warn("fail to create new growing segment")
		return err
	}
	log.Info("create new growing segment")
	return nil
}

func (impl *msgHandlerImpl) createNewGrowingSegment(ctx context.Context, vchannel string, h *message.CreateSegmentMessageHeader) error {
	// Transfer the pending segment into growing state.
	// Alloc the growing segment at datacoord first.
	mix, err := resource.Resource().MixCoordClient().GetWithContext(ctx)
	if err != nil {
		return err
	}
	logger := log.With(zap.Int64("collectionID", h.CollectionId), zap.Int64("partitionID", h.PartitionId), zap.Int64("segmentID", h.SegmentId))
	return retry.Do(ctx, func() (err error) {
		resp, err := mix.AllocSegment(ctx, &datapb.AllocSegmentRequest{
			CollectionId:         h.CollectionId,
			PartitionId:          h.PartitionId,
			SegmentId:            h.SegmentId,
			Vchannel:             vchannel,
			StorageVersion:       h.StorageVersion,
			IsCreatedByStreaming: true,
		})
		if err := merr.CheckRPCCall(resp, err); err != nil {
			logger.Warn("failed to alloc growing segment at datacoord")
			return errors.Wrap(err, "failed to alloc growing segment at datacoord")
		}
		logger.Info("alloc growing segment at datacoord")
		return nil
	}, retry.AttemptAlways())
}

func (impl *msgHandlerImpl) HandleFlush(flushMsg message.ImmutableFlushMessageV2) error {
	vchannel := flushMsg.VChannel()
	if err := impl.wbMgr.SealSegments(context.Background(), vchannel, []int64{flushMsg.Header().SegmentId}); err != nil {
		return errors.Wrap(err, "failed to seal segments")
	}
	return nil
}

func (impl *msgHandlerImpl) HandleManualFlush(flushMsg message.ImmutableManualFlushMessageV2) error {
	vchannel := flushMsg.VChannel()
	if err := impl.wbMgr.SealSegments(context.Background(), vchannel, flushMsg.Header().SegmentIds); err != nil {
		return errors.Wrap(err, "failed to seal segments")
	}
	if err := impl.wbMgr.FlushChannel(context.Background(), vchannel, flushMsg.Header().FlushTs); err != nil {
		return errors.Wrap(err, "failed to flush channel")
	} // may be redundant.

	broadcastID := flushMsg.BroadcastHeader().BroadcastID
	if broadcastID == 0 {
		return nil
	}
	return streaming.WAL().Broadcast().Ack(context.Background(), types.BroadcastAckRequest{
		BroadcastID: flushMsg.BroadcastHeader().BroadcastID,
		VChannel:    vchannel,
	})
}

func (impl *msgHandlerImpl) HandleSchemaChange(ctx context.Context, msg message.ImmutableSchemaChangeMessageV2) error {
	vchannel := msg.VChannel()
	impl.wbMgr.SealSegments(context.Background(), msg.VChannel(), msg.Header().FlushedSegmentIds)
	return streaming.WAL().Broadcast().Ack(ctx, types.BroadcastAckRequest{
		BroadcastID: msg.BroadcastHeader().BroadcastID,
		VChannel:    vchannel,
	})
}

func (impl *msgHandlerImpl) HandleImport(ctx context.Context, vchannel string, importMsg *msgpb.ImportMsg) error {
	return retry.Do(ctx, func() (err error) {
		defer func() {
			if err == nil {
				err = streaming.WAL().Broadcast().Ack(ctx, types.BroadcastAckRequest{
					BroadcastID: uint64(importMsg.GetJobID()),
					VChannel:    vchannel,
				})
			}
		}()
		client, err := resource.Resource().MixCoordClient().GetWithContext(ctx)
		if err != nil {
			return err
		}
		importResp, err := client.ImportV2(ctx, &internalpb.ImportRequestInternal{
			CollectionID:   importMsg.GetCollectionID(),
			CollectionName: importMsg.GetCollectionName(),
			PartitionIDs:   importMsg.GetPartitionIDs(),
			ChannelNames:   []string{vchannel},
			Schema:         importMsg.GetSchema(),
			Files:          lo.Map(importMsg.GetFiles(), util.ConvertInternalImportFile),
			Options:        funcutil.Map2KeyValuePair(importMsg.GetOptions()),
			DataTimestamp:  importMsg.GetBase().GetTimestamp(),
			JobID:          importMsg.GetJobID(),
		})
		err = merr.CheckRPCCall(importResp, err)
		if errors.Is(err, merr.ErrCollectionNotFound) {
			log.Ctx(ctx).Warn("import message failed because of collection not found, skip it", zap.String("job_id", importResp.GetJobID()), zap.Error(err))
			return nil
		}
		if err != nil {
			log.Ctx(ctx).Warn("import message failed", zap.String("job_id", importResp.GetJobID()), zap.Error(err))
			return err
		}
		log.Ctx(ctx).Info("import message handled", zap.String("job_id", importResp.GetJobID()))
		return nil
	}, retry.AttemptAlways())
}