mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-05-11 22:10:46 +02:00
110 lines
3.5 KiB
Go
110 lines
3.5 KiB
Go
package segment
|
|
|
|
import (
|
|
"github.com/chrislusf/seaweedfs/weed/pb/message_fbs"
|
|
flatbuffers "github.com/google/flatbuffers/go"
|
|
)
|
|
|
|
type MessageBatchBuilder struct {
|
|
b *flatbuffers.Builder
|
|
producerId int32
|
|
producerEpoch int32
|
|
segmentId int32
|
|
flags int32
|
|
messageOffsets []flatbuffers.UOffsetT
|
|
segmentSeqBase int64
|
|
segmentSeqLast int64
|
|
tsMsBase int64
|
|
tsMsLast int64
|
|
}
|
|
|
|
func NewMessageBatchBuilder(b *flatbuffers.Builder,
|
|
producerId int32,
|
|
producerEpoch int32,
|
|
segmentId int32,
|
|
flags int32) *MessageBatchBuilder {
|
|
|
|
b.Reset()
|
|
|
|
return &MessageBatchBuilder{
|
|
b: b,
|
|
producerId: producerId,
|
|
producerEpoch: producerEpoch,
|
|
segmentId: segmentId,
|
|
flags: flags,
|
|
}
|
|
}
|
|
|
|
func (builder *MessageBatchBuilder) AddMessage(segmentSeq int64, tsMs int64, properties map[string][]byte, key []byte, value []byte) {
|
|
if builder.segmentSeqBase == 0 {
|
|
builder.segmentSeqBase = segmentSeq
|
|
}
|
|
builder.segmentSeqLast = segmentSeq
|
|
if builder.tsMsBase == 0 {
|
|
builder.tsMsBase = tsMs
|
|
}
|
|
builder.tsMsLast = tsMs
|
|
|
|
var names, values, pairs []flatbuffers.UOffsetT
|
|
for k, v := range properties {
|
|
names = append(names, builder.b.CreateString(k))
|
|
values = append(values, builder.b.CreateByteVector(v))
|
|
}
|
|
for i, _ := range names {
|
|
message_fbs.NameValueStart(builder.b)
|
|
message_fbs.NameValueAddName(builder.b, names[i])
|
|
message_fbs.NameValueAddValue(builder.b, values[i])
|
|
pair := message_fbs.NameValueEnd(builder.b)
|
|
pairs = append(pairs, pair)
|
|
}
|
|
|
|
message_fbs.MessageStartPropertiesVector(builder.b, len(properties))
|
|
for i := len(pairs) - 1; i >= 0; i-- {
|
|
builder.b.PrependUOffsetT(pairs[i])
|
|
}
|
|
propOffset := builder.b.EndVector(len(properties))
|
|
|
|
keyOffset := builder.b.CreateByteVector(key)
|
|
valueOffset := builder.b.CreateByteVector(value)
|
|
|
|
message_fbs.MessageStart(builder.b)
|
|
message_fbs.MessageAddSeqDelta(builder.b, int32(segmentSeq-builder.segmentSeqBase))
|
|
message_fbs.MessageAddTsMsDelta(builder.b, int32(tsMs-builder.tsMsBase))
|
|
|
|
message_fbs.MessageAddProperties(builder.b, propOffset)
|
|
message_fbs.MessageAddKey(builder.b, keyOffset)
|
|
message_fbs.MessageAddData(builder.b, valueOffset)
|
|
messageOffset := message_fbs.MessageEnd(builder.b)
|
|
|
|
builder.messageOffsets = append(builder.messageOffsets, messageOffset)
|
|
|
|
}
|
|
|
|
func (builder *MessageBatchBuilder) BuildMessageBatch() {
|
|
message_fbs.MessageBatchStartMessagesVector(builder.b, len(builder.messageOffsets))
|
|
for i := len(builder.messageOffsets) - 1; i >= 0; i-- {
|
|
builder.b.PrependUOffsetT(builder.messageOffsets[i])
|
|
}
|
|
messagesOffset := builder.b.EndVector(len(builder.messageOffsets))
|
|
|
|
message_fbs.MessageBatchStart(builder.b)
|
|
message_fbs.MessageBatchAddProducerId(builder.b, builder.producerId)
|
|
message_fbs.MessageBatchAddProducerEpoch(builder.b, builder.producerEpoch)
|
|
message_fbs.MessageBatchAddSegmentId(builder.b, builder.segmentId)
|
|
message_fbs.MessageBatchAddFlags(builder.b, builder.flags)
|
|
message_fbs.MessageBatchAddSegmentSeqBase(builder.b, builder.segmentSeqBase)
|
|
message_fbs.MessageBatchAddSegmentSeqMaxDelta(builder.b, int32(builder.segmentSeqLast-builder.segmentSeqBase))
|
|
message_fbs.MessageBatchAddTsMsBase(builder.b, builder.tsMsBase)
|
|
message_fbs.MessageBatchAddTsMsMaxDelta(builder.b, int32(builder.tsMsLast-builder.tsMsBase))
|
|
|
|
message_fbs.MessageBatchAddMessages(builder.b, messagesOffset)
|
|
|
|
messageBatch := message_fbs.MessageBatchEnd(builder.b)
|
|
|
|
builder.b.Finish(messageBatch)
|
|
}
|
|
|
|
func (builder *MessageBatchBuilder) GetBytes() []byte {
|
|
return builder.b.FinishedBytes()
|
|
}
|