nicoloboschi commented on code in PR #15757:
URL: https://github.com/apache/pulsar/pull/15757#discussion_r881336188


##########
managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/ManagedCursorImpl.java:
##########
@@ -313,6 +316,52 @@ public Map<String, Long> getProperties() {
         return lastMarkDeleteEntry != null ? lastMarkDeleteEntry.properties : 
Collections.emptyMap();
     }
 
+    @Override
+    public Map<String, String> getCursorProperties() {
+        return cursorProperties;
+    }
+
+    @Override
+    public CompletableFuture<Void> updateCursorProperties(Map<String, String> 
cursorProperties) {
+        CompletableFuture<Void> updateCursorPropertiesResult = new 
CompletableFuture<>();
+        ledger.getStore().asyncGetCursorInfo(ledger.getName(), name, new 
MetaStoreCallback<>() {
+            @Override
+            public void operationComplete(ManagedCursorInfo info, Stat stat) {
+                ManagedCursorInfo copy = ManagedCursorInfo
+                        .newBuilder(info)
+                        .clearCursorProperties()
+                        
.addAllCursorProperties(buildStringPropertiesMap(cursorProperties))
+                        .build();
+                ledger.getStore().asyncUpdateCursorInfo(ledger.getName(),
+                        name, copy, stat, new MetaStoreCallback<>() {
+                    @Override
+                    public void operationComplete(Void result, Stat stat) {
+                        log.info("[{}] Updated ledger cursor: {} properties 
{}", ledger.getName(),
+                                name, cursorProperties);
+                        ManagedCursorImpl.this.cursorProperties = 
cursorProperties;
+                        cursorLedgerStat = stat;
+                        updateCursorPropertiesResult.complete(result);
+                    }
+
+                    @Override
+                    public void operationFailed(MetaStoreException e) {
+                        log.info("[{}] Error while updating ledger cursor: {} 
properties {}", ledger.getName(),

Review Comment:
   log.error ? 



##########
managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/ManagedCursorImpl.java:
##########
@@ -313,6 +316,52 @@ public Map<String, Long> getProperties() {
         return lastMarkDeleteEntry != null ? lastMarkDeleteEntry.properties : 
Collections.emptyMap();
     }
 
+    @Override
+    public Map<String, String> getCursorProperties() {
+        return cursorProperties;
+    }
+
+    @Override
+    public CompletableFuture<Void> updateCursorProperties(Map<String, String> 
cursorProperties) {
+        CompletableFuture<Void> updateCursorPropertiesResult = new 
CompletableFuture<>();
+        ledger.getStore().asyncGetCursorInfo(ledger.getName(), name, new 
MetaStoreCallback<>() {
+            @Override
+            public void operationComplete(ManagedCursorInfo info, Stat stat) {
+                ManagedCursorInfo copy = ManagedCursorInfo
+                        .newBuilder(info)
+                        .clearCursorProperties()
+                        
.addAllCursorProperties(buildStringPropertiesMap(cursorProperties))
+                        .build();
+                ledger.getStore().asyncUpdateCursorInfo(ledger.getName(),
+                        name, copy, stat, new MetaStoreCallback<>() {
+                    @Override
+                    public void operationComplete(Void result, Stat stat) {
+                        log.info("[{}] Updated ledger cursor: {} properties 
{}", ledger.getName(),
+                                name, cursorProperties);
+                        ManagedCursorImpl.this.cursorProperties = 
cursorProperties;
+                        cursorLedgerStat = stat;
+                        updateCursorPropertiesResult.complete(result);
+                    }
+
+                    @Override
+                    public void operationFailed(MetaStoreException e) {
+                        log.info("[{}] Error while updating ledger cursor: {} 
properties {}", ledger.getName(),
+                                name, cursorProperties, e);
+                        updateCursorPropertiesResult.completeExceptionally(e);
+                    }
+                });
+            }
+
+            @Override
+            public void operationFailed(MetaStoreException e) {
+                log.info("[{}] Error while updating ledger cursor: {} 
properties {}", ledger.getName(),

Review Comment:
   log.error ?



##########
pulsar-broker/src/main/java/org/apache/pulsar/broker/service/persistent/PersistentSubscription.java:
##########
@@ -1094,6 +1094,20 @@ public Map<String, String> getSubscriptionProperties() {
         return subscriptionProperties;
     }
 
+    @Override
+    public CompletableFuture<Void> updateSubscriptionProperties(Map<String, 
String> subscriptionProperties) {
+        Map<String, String> newSubscriptionProperties;
+        if (subscriptionProperties == null) {

Review Comment:
   or empty ? 



##########
pulsar-broker/src/main/java/org/apache/pulsar/broker/service/nonpersistent/NonPersistentSubscription.java:
##########
@@ -526,4 +526,15 @@ public void updateLastActive() {
     public Map<String, String> getSubscriptionProperties() {
         return subscriptionProperties;
     }
+
+    @Override
+    public CompletableFuture<Void> updateSubscriptionProperties(Map<String, 
String> subscriptionProperties) {
+        if (subscriptionProperties == null) {

Review Comment:
   or empty ? 



##########
managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/ManagedCursorImpl.java:
##########
@@ -2619,6 +2683,20 @@ private List<LongProperty> 
buildPropertiesMap(Map<String, Long> properties) {
         return longProperties;
     }
 
+    private static List<StringProperty> buildStringPropertiesMap(Map<String, 
String> properties) {
+        if (properties == null || properties.isEmpty()) {
+            return Collections.emptyList();
+        }
+
+        List<StringProperty> stringProperties = Lists.newArrayList();

Review Comment:
   nit: we can create a list with the same size of properties#size



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