mirror of
https://gitee.com/milvus-io/milvus.git
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58 lines
2.4 KiB
Go
58 lines
2.4 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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package datanode
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import (
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"context"
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"strconv"
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"github.com/milvus-io/milvus/internal/log"
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"github.com/milvus-io/milvus/internal/msgstream"
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"github.com/milvus-io/milvus/internal/proto/internalpb"
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"github.com/milvus-io/milvus/internal/rootcoord"
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"github.com/milvus-io/milvus/internal/util/flowgraph"
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)
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// DmInputNode receives messages from message streams, packs messages between two timeticks, and passes all
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// messages between two timeticks to the following flowgraph node. In DataNode, the following flow graph node is
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// flowgraph ddNode.
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func newDmInputNode(ctx context.Context, factory msgstream.Factory, collID UniqueID, chanName string, seekPos *internalpb.MsgPosition) (*flowgraph.InputNode, error) {
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maxQueueLength := Params.FlowGraphMaxQueueLength
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maxParallelism := Params.FlowGraphMaxParallelism
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// subName should be unique, since pchannelName is shared among several collections
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consumeSubName := Params.MsgChannelSubName + "-" + strconv.FormatInt(collID, 10)
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insertStream, err := factory.NewTtMsgStream(ctx)
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if err != nil {
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return nil, err
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}
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// MsgStream needs a physical channel name, but the channel name in seek position from DataCoord
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// is virtual channel name, so we need to convert vchannel name into pchannel neme here.
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pchannelName := rootcoord.ToPhysicalChannel(chanName)
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insertStream.AsConsumer([]string{pchannelName}, consumeSubName)
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log.Debug("datanode AsConsumer physical channel: " + pchannelName + " : " + consumeSubName)
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if seekPos != nil {
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seekPos.ChannelName = pchannelName
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log.Debug("datanode Seek: " + seekPos.GetChannelName())
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err = insertStream.Seek([]*internalpb.MsgPosition{seekPos})
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if err != nil {
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return nil, err
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}
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}
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var stream msgstream.MsgStream = insertStream
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node := flowgraph.NewInputNode(stream, "dmInputNode", maxQueueLength, maxParallelism)
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return node, nil
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}
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