Merge pull request #952 from cvictory/feature/proxy_expose_invoker

Add GetInvoker method in Proxy.

common/proxy/proxy.go

@@ -234,3 +234,8 @@ func (p *Proxy) Get() common.RPCService {
 func (p *Proxy) GetCallback() interface{} {
 	return p.callBack
 }
+
+// GetInvoker gets Invoker.
+func (p *Proxy) GetInvoker() protocol.Invoker {
+	return p.invoke
+}

config/reference_config.go

@@ -185,6 +185,11 @@ func (c *ReferenceConfig) GetRPCService() common.RPCService {
 	return c.pxy.Get()
 }
 
+// GetProxy gets proxy
+func (c *ReferenceConfig) GetProxy() *proxy.Proxy {
+	return c.pxy
+}
+
 func (c *ReferenceConfig) getUrlMap() url.Values {
 	urlMap := url.Values{}
 	//first set user params