pinxiong commented on a change in pull request #8508:
URL: https://github.com/apache/dubbo/pull/8508#discussion_r689197765
##########
File path:
dubbo-registry/dubbo-registry-multiple/src/main/java/org/apache/dubbo/registry/multiple/MultipleRegistry.java
##########
@@ -26,12 +26,7 @@
import org.apache.dubbo.registry.RegistryFactory;
import org.apache.dubbo.registry.support.AbstractRegistry;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
+import java.util.*;
Review comment:
Remove the import*
##########
File path:
dubbo-registry/dubbo-registry-multiple/src/main/java/org/apache/dubbo/registry/multiple/MultipleRegistry.java
##########
@@ -200,9 +195,27 @@ public void unsubscribe(URL url, NotifyListener listener) {
urls.addAll(tmpUrls);
}
}
+ urls = removeDuplicate(urls);
return urls;
}
+ protected static List<URL> removeDuplicate(List<URL> urls) {
+ Set<List<String>> set = new HashSet<>();
+ List<URL> dedupList = new ArrayList<>();
+ for (URL url : urls) {
+ List<String> tmp = new ArrayList<>();
+ tmp.add(url.getAddress());
+ tmp.add(url.getProtocol());
+ tmp.add(url.getParameter("group"));
+ tmp.add(url.getParameter("version"));
+ if (!set.contains(tmp)) {
+ set.add(tmp);
+ dedupList.add(url);
+ }
Review comment:
It's not the best way to check if two URLs are equal, you can refer
[URL#equals](https://github.com/apache/dubbo/blob/3.0/dubbo-common/src/main/java/org/apache/dubbo/common/URL.java#L1432)
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