add flatbuffer serde for 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())
+
+}