Add ella's compiler adaptor

adaptor/ella.go

@@ -0,0 +1,32 @@
+package adaptor
+
+import (
+	"context"
+	"encoding/json"
+
+	"ella.to/bus"
+)
+
+//
+// Ella is an adaptor for the compatibility of the bus.Stream and ella compiler for rpc calls
+//
+
+type Ella struct {
+	stream bus.Stream
+}
+
+// var _ rpcAdaptor = (*Ella)(nil)
+
+func (b *Ella) Request(ctx context.Context, topic string, in any) (json.RawMessage, error) {
+	fn := bus.Request(b.stream, topic)
+	return fn(ctx, in)
+}
+
+func (b *Ella) Reply(ctx context.Context, topic string, fn func(ctx context.Context, data json.RawMessage) (out any, err error)) error {
+	bus.Reply(ctx, b.stream, topic, fn)
+	return nil
+}
+
+func NewElla(stream bus.Stream) *Ella {
+	return &Ella{stream: stream}
+}