add flatbuffer serde for message

weed/mq/segment/message_serde.go

@@ -0,0 +1,48 @@
+package segment
+
+import (
+	"github.com/chrislusf/seaweedfs/weed/pb/message_fbs"
+	flatbuffers "github.com/google/flatbuffers/go"
+)
+
+func CreateMessage(b *flatbuffers.Builder, producerId int32, producerSeq int64, segmentId int32, segmentSeq int64,
+	eventTsNs int64, recvTsNs int64, properties map[string]string, key []byte, value []byte) {
+	b.Reset()
+
+	var names, values, pairs []flatbuffers.UOffsetT
+	for k, v := range properties {
+		names = append(names, b.CreateString(k))
+		values = append(values, b.CreateString(v))
+	}
+
+	for i, _ := range names {
+		message_fbs.NameValueStart(b)
+		message_fbs.NameValueAddName(b, names[i])
+		message_fbs.NameValueAddValue(b, values[i])
+		pair := message_fbs.NameValueEnd(b)
+		pairs = append(pairs, pair)
+	}
+	message_fbs.MessageStartPropertiesVector(b, len(properties))
+	for i := len(pairs) - 1; i >= 0; i-- {
+		b.PrependUOffsetT(pairs[i])
+	}
+	prop := b.EndVector(len(properties))
+
+	k := b.CreateByteVector(key)
+	v := b.CreateByteVector(value)
+
+	message_fbs.MessageStart(b)
+	message_fbs.MessageAddProducerId(b, producerId)
+	message_fbs.MessageAddProducerSeq(b, producerSeq)
+	message_fbs.MessageAddSegmentId(b, segmentId)
+	message_fbs.MessageAddSegmentSeq(b, segmentSeq)
+	message_fbs.MessageAddEventTsNs(b, eventTsNs)
+	message_fbs.MessageAddRecvTsNs(b, recvTsNs)
+
+	message_fbs.MessageAddProperties(b, prop)
+	message_fbs.MessageAddKey(b, k)
+	message_fbs.MessageAddData(b, v)
+	message := message_fbs.MessageEnd(b)
+
+	b.Finish(message)
+}

weed/mq/segment/message_serde_test.go

@@ -0,0 +1,47 @@
+package segment
+
+import (
+	"github.com/chrislusf/seaweedfs/weed/pb/message_fbs"
+	flatbuffers "github.com/google/flatbuffers/go"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestMessageSerde(t *testing.T) {
+	b := flatbuffers.NewBuilder(1024)
+
+	prop := make(map[string]string)
+	prop["n1"] = "v1"
+	prop["n2"] = "v2"
+
+	CreateMessage(b, 1, 2, 3, 4, 5, 6, prop,
+		[]byte("the primary key"), []byte("body is here"))
+
+	buf := b.FinishedBytes()
+
+	println("serialized size", len(buf))
+
+	m := message_fbs.GetRootAsMessage(buf, 0)
+
+	assert.Equal(t, int32(1), m.ProducerId())
+	assert.Equal(t, int64(2), m.ProducerSeq())
+	assert.Equal(t, int32(3), m.SegmentId())
+	assert.Equal(t, int64(4), m.SegmentSeq())
+	assert.Equal(t, int64(5), m.EventTsNs())
+	assert.Equal(t, int64(6), m.RecvTsNs())
+
+	assert.Equal(t, 2, m.PropertiesLength())
+	nv := &message_fbs.NameValue{}
+	m.Properties(nv, 0)
+	assert.Equal(t, "n1", string(nv.Name()))
+	assert.Equal(t, "v1", string(nv.Value()))
+	m.Properties(nv, 1)
+	assert.Equal(t, "n2", string(nv.Name()))
+	assert.Equal(t, "v2", string(nv.Value()))
+	assert.Equal(t, []byte("the primary key"), m.Key())
+	assert.Equal(t, []byte("body is here"), m.Data())
+
+	m.MutateSegmentSeq(123)
+	assert.Equal(t, int64(123), m.SegmentSeq())
+
+}

weed/mq/segment/segment_serde.go

@@ -0,0 +1 @@
+package segment