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app/service/bbq/recsys-recall/model/BUILD

@@ -0,0 +1,29 @@
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "model.go",
+        "tuple.go",
+    ],
+    importpath = "go-common/app/service/bbq/recsys-recall/model",
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

app/service/bbq/recsys-recall/model/model.go

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+package model

app/service/bbq/recsys-recall/model/tuple.go

@@ -0,0 +1,61 @@
+package model
+
+import (
+	"encoding/binary"
+	"math"
+)
+
+const (
+	_tupleSize = 12
+)
+
+// Tuple .
+type Tuple struct {
+	Svid  uint64
+	Score float32
+}
+
+// PriorityTuple .
+type PriorityTuple struct {
+	Tuple
+	Tag      string
+	Name     string
+	Priority int32
+}
+
+// ToBytes .
+func (t *Tuple) ToBytes() []byte {
+	b := make([]byte, 12)
+
+	b[0] = byte(t.Svid)
+	b[1] = byte(t.Svid >> 8)
+	b[2] = byte(t.Svid >> 16)
+	b[3] = byte(t.Svid >> 24)
+	b[4] = byte(t.Svid >> 32)
+	b[5] = byte(t.Svid >> 40)
+	b[6] = byte(t.Svid >> 48)
+	b[7] = byte(t.Svid >> 56)
+	// score
+	score := math.Float32bits(t.Score)
+	b[8] = byte(score)
+	b[9] = byte(score >> 8)
+	b[10] = byte(score >> 16)
+	b[11] = byte(score >> 24)
+
+	return b
+}
+
+// ParseTuple .
+func ParseTuple(b []byte) *Tuple {
+	svid := binary.LittleEndian.Uint64(b[:8])
+	score := math.Float32frombits(binary.LittleEndian.Uint32(b[8:12]))
+	return &Tuple{
+		Svid:  svid,
+		Score: score,
+	}
+}
+
+// TupleSize .
+func TupleSize() int {
+	return _tupleSize
+}