zouyx commented on a change in pull request #722:
URL: https://github.com/apache/dubbo-go/pull/722#discussion_r479721966



##########
File path: protocol/protocolwrapper/protocol_filter_wrapper.go
##########
@@ -68,21 +68,16 @@ func (pfw *ProtocolFilterWrapper) Destroy() {
 }
 
 func buildInvokerChain(invoker protocol.Invoker, key string) protocol.Invoker {
-       filtName := invoker.GetUrl().GetParam(key, "")
-       if filtName == "" {

Review comment:
       why do you remove this `if`?

##########
File path: registry/registry.go
##########
@@ -30,30 +30,37 @@ import (
 // Registry Extension - Registry
 type Registry interface {
        common.Node
-       //used for service provider calling , register services to registry
-       //And it is also used for service consumer calling , register services 
cared about ,for dubbo's admin monitoring.
+
+       // used for service provider calling, register services to registry

Review comment:
       ```suggestion
        // Register used for service provider calling, register services to 
registry
   ```

##########
File path: registry/registry.go
##########
@@ -30,30 +30,37 @@ import (
 // Registry Extension - Registry
 type Registry interface {
        common.Node
-       //used for service provider calling , register services to registry
-       //And it is also used for service consumer calling , register services 
cared about ,for dubbo's admin monitoring.
+
+       // used for service provider calling, register services to registry
+       // And it is also used for service consumer calling, register
+       // services cared about, for dubbo's admin monitoring.
        Register(url common.URL) error
 
        // UnRegister is required to support the contract:
-       // 1. If it is the persistent stored data of dynamic=false, the 
registration data can not be found, then the IllegalStateException is thrown, 
otherwise it is ignored.
+       // 1. If it is the persistent stored data of dynamic=false, the
+       //    registration data can not be found, then the IllegalStateException
+       //    is thrown, otherwise it is ignored.
        // 2. Unregister according to the full url match.
-       // url Registration information , is not allowed to be empty, e.g: 
dubbo://10.20.153.10/org.apache.dubbo.foo.BarService?version=1.0.0&application=kylin
+       // url Registration information, is not allowed to be empty, e.g:
+       // 
dubbo://10.20.153.10/org.apache.dubbo.foo.BarService?version=1.0.0&application=kylin
        UnRegister(url common.URL) error
 
-       //When creating new registry extension,pls select one of the following 
modes.
-       //Will remove in dubbogo version v1.1.0
-       //mode1 : return Listener with Next function which can return subscribe 
service event from registry
-       //Deprecated!
-       //subscribe(event.URL) (Listener, error)
-
-       //Will replace mode1 in dubbogo version v1.1.0
-       //mode2 : callback mode, subscribe with notify(notify listener).
+       // When creating new registry extension, pls select one of the

Review comment:
       Add method name in front of this sentence.




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