milvus/internal/util/flowgraph/message.go

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// Copyright (C) 2019-2020 Zilliz. All rights reserved.
//
// Licensed 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 flowgraph
import (
"github.com/milvus-io/milvus/internal/msgstream"
)
// Msg is an abstract class that contains a method to get the time tick of this message
type Msg interface {
TimeTick() Timestamp
}
// MsgStreamMsg is a wrapper of TsMsg in flowgraph
type MsgStreamMsg struct {
tsMessages []msgstream.TsMsg
timestampMin Timestamp
timestampMax Timestamp
startPositions []*MsgPosition
endPositions []*MsgPosition
}
// GenerateMsgStreamMsg is used to create a new MsgStreamMsg object
func GenerateMsgStreamMsg(tsMessages []msgstream.TsMsg, timestampMin, timestampMax Timestamp, startPos []*MsgPosition, endPos []*MsgPosition) *MsgStreamMsg {
return &MsgStreamMsg{
tsMessages: tsMessages,
timestampMin: timestampMin,
timestampMax: timestampMax,
startPositions: startPos,
endPositions: endPos,
}
}
// TimeTick returns the timetick of this message
func (msMsg *MsgStreamMsg) TimeTick() Timestamp {
return msMsg.timestampMax
}
// DownStreamNodeIdx returns 0
func (msMsg *MsgStreamMsg) DownStreamNodeIdx() int {
return 0
}
// TsMessages returns the origin TsMsg object list
func (msMsg *MsgStreamMsg) TsMessages() []msgstream.TsMsg {
return msMsg.tsMessages
}
// TimestampMin returns the minimal timestamp in the TsMsg list
func (msMsg *MsgStreamMsg) TimestampMin() Timestamp {
return msMsg.timestampMin
}
// TimestampMax returns the maximal timestamp in the TsMsg list
func (msMsg *MsgStreamMsg) TimestampMax() Timestamp {
return msMsg.timestampMax
}
// StartPositions returns the start position of TsMsgs
func (msMsg *MsgStreamMsg) StartPositions() []*MsgPosition {
return msMsg.startPositions
}
// EndPositions returns the end position of TsMsgs
func (msMsg *MsgStreamMsg) EndPositions() []*MsgPosition {
return msMsg.endPositions
}