Copilot commented on code in PR #15633:
URL: https://github.com/apache/dubbo/pull/15633#discussion_r2280283284
##########
dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/client/DefaultServiceInstance.java:
##########
@@ -59,6 +60,8 @@ public class DefaultServiceInstance implements
ServiceInstance {
private Map<String, String> metadata = new HashMap<>();
Review Comment:
The `identicalMetadata` field lacks documentation explaining its purpose and
relationship to the main `metadata` field. Consider adding a comment explaining
that this field stores metadata excluding timestamp and revision keys for
equality comparison.
```suggestion
/**
* Stores a copy of the metadata map excluding timestamp and revision
keys.
* Used for equality comparison to ignore changes in those specific keys.
* This field is related to {@link #metadata} but omits keys such as
TIMESTAMP_KEY and EXPORTED_SERVICES_REVISION_PROPERTY_NAME.
*/
```
##########
dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/client/DefaultServiceInstance.java:
##########
@@ -91,6 +94,7 @@ public DefaultServiceInstance(DefaultServiceInstance other) {
this.applicationModel = other.applicationModel;
this.extendParams = other.extendParams != null ? new
HashMap<>(other.extendParams) : other.extendParams;
this.endpoints = other.endpoints != null ? new
ArrayList<>(other.endpoints) : other.endpoints;
+ setIdenticalMetadata(this.metadata);
Review Comment:
The `setIdenticalMetadata` call should use `other.metadata` instead of
`this.metadata` since `this.metadata` hasn't been set yet in the copy
constructor. This could result in an empty `identicalMetadata` if the original
metadata is null.
```suggestion
setIdenticalMetadata(other.metadata);
```
##########
dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/client/DefaultServiceInstance.java:
##########
@@ -254,14 +260,17 @@ public DefaultServiceInstance copyFrom(int port) {
@Override
public Map<String, String> getAllParams() {
+ // return copy to avoid external modification of the internal state.
+ Map<String, String> allParams;
if (extendParams == null) {
- return metadata;
+ allParams = new HashMap<>((int) (metadata.size() / 0.75f + 1));
Review Comment:
The magic number `0.75f` represents the HashMap default load factor but
should be extracted as a named constant for better maintainability and clarity.
##########
dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/client/DefaultServiceInstance.java:
##########
@@ -350,6 +351,13 @@ public String toFullString() {
+ metadata + '}';
}
+ private void setIdenticalMetadata(Map<String, String> metadata) {
+ TreeMap<String, String> identicalMetadata = new TreeMap<>(metadata);
Review Comment:
The method doesn't handle null metadata input, which could cause a
NullPointerException when creating the TreeMap. Add a null check to handle this
case gracefully.
```suggestion
TreeMap<String, String> identicalMetadata = new TreeMap<>(metadata
== null ? Collections.emptyMap() : metadata);
```
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