gougouzcm opened a new issue #1552: How can I add a custom param(SPI) when zookeeperRegistry register url on zk URL: https://github.com/apache/incubator-dubbo/issues/1552 the similar issue is [#1367](https://github.com/apache/incubator-dubbo/issues/1367) but I didn't get solution from it. I need to write a custom router for dubbo AB test( not the group lable in xml ) I notice that [AbstractDirectory.java](https://github.com/apache/incubator-dubbo/blob/master/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/directory/AbstractDirectory.java) In the method ``` 1. protected void setRouters(List<Router> routers) { 2. // copy list 3. routers = routers == null ? new ArrayList<Router>() : new ArrayList<Router>(routers); 4. // append url router 5. String routerkey = url.getParameter(Constants.ROUTER_KEY); 6. if (routerkey != null && routerkey.length() > 0) { 7. RouterFactory routerFactory = ExtensionLoader.getExtensionLoader(RouterFactory.class).getExtension(routerkey); 8. routers.add(routerFactory.getRouter(url)); 9. } 10. // append mock invoker selector 11. routers.add(new MockInvokersSelector()); 12. Collections.sort(routers); 13. this.routers = routers; 14. } ``` It will add some additional router ( I mean not from category routers but from from registry url) 。I don't want add a router in dubbo-admin-web for every Interface, I want a global setting like filter or balance lable such as `<dubbo:consumer filter="traceFilter" loadbalance=" ***** "></dubbo:consumer>` OR I has some ways to add a param &router=myRouter& in registry url 。 can anyone help me , thx。
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