add all the plugins

plugins/codec/segmentio/marshaler.go

@@ -0,0 +1,47 @@
+package json
+
+import (
+	"bytes"
+
+	"github.com/golang/protobuf/jsonpb"
+	"github.com/golang/protobuf/proto"
+	"github.com/oxtoacart/bpool"
+	"github.com/segmentio/encoding/json"
+)
+
+var jsonpbMarshaler = &jsonpb.Marshaler{}
+var jsonpbUnmarshaler = &jsonpb.Unmarshaler{}
+
+// create buffer pool with 16 instances each preallocated with 256 bytes
+var bufferPool = bpool.NewSizedBufferPool(16, 256)
+var bytesPool = bpool.NewBytePool(16*256, 256)
+
+type Marshaler struct{}
+
+func (j Marshaler) Marshal(v interface{}) ([]byte, error) {
+	if pb, ok := v.(proto.Message); ok {
+		buf := bufferPool.Get()
+		defer bufferPool.Put(buf)
+		if err := jsonpbMarshaler.Marshal(buf, pb); err != nil {
+			return nil, err
+		}
+		return buf.Bytes(), nil
+	}
+	buf := bytesPool.Get()
+	defer bytesPool.Put(buf)
+	return json.Append(buf[:0], v, 0)
+}
+
+func (j Marshaler) Unmarshal(d []byte, v interface{}) error {
+	if pb, ok := v.(proto.Message); ok {
+		return jsonpbUnmarshaler.Unmarshal(bytes.NewReader(d), pb)
+	}
+	if _, err := json.Parse(d, v, json.ZeroCopy); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (j Marshaler) String() string {
+	return "json"
+}