Add the track of the completion of the topology refresh cancel

Author: thachlp

src/main/java/io/lettuce/core/cluster/ClusterTopologyRefreshScheduler.java

@@ -94,29 +94,33 @@ protected void activateTopologyRefreshIfNeeded() {
     /**
      * Suspend (cancel) periodic topology refresh.
      */
-    public void suspendTopologyRefresh() {
+    public CompletableFuture<Void> suspendTopologyRefresh() {
+        CompletableFuture<Void> completionFuture = new CompletableFuture<>();
 
         if (clusterTopologyRefreshActivated.compareAndSet(true, false)) {
-
             ScheduledFuture<?> scheduledFuture = clusterTopologyRefreshFuture.get();
 
             try {
-                scheduledFuture.cancel(false);
-                clusterTopologyRefreshFuture.set(null);
+                if (scheduledFuture != null) {
+                    scheduledFuture.cancel(false);
+                    clusterTopologyRefreshFuture.set(null);
+                }
+                completionFuture.complete(null);
             } catch (Exception e) {
                 logger.debug("Could not cancel Cluster topology refresh", e);
+                completionFuture.completeExceptionally(e);
             }
+        } else {
+            completionFuture.complete(null);
         }
+
+        return completionFuture;
     }
 
     public boolean isTopologyRefreshInProgress() {
         return clusterTopologyRefreshTask.get();
     }
 
-    public CompletableFuture<Void> getTopologyRefreshCompletionFuture() {
-        return clusterTopologyRefreshTask.getCompletionFuture();
-    }
-
     @Override
     public void run() {
 
@@ -322,16 +326,10 @@ private static class ClusterTopologyRefreshTask extends AtomicBoolean implements
 
         private final Supplier<CompletionStage<?>> reloadTopologyAsync;
 
-        private final CompletableFuture<Void> completionFuture = new CompletableFuture<>();
-
         ClusterTopologyRefreshTask(Supplier<CompletionStage<?>> reloadTopologyAsync) {
             this.reloadTopologyAsync = reloadTopologyAsync;
         }
 
-        public CompletableFuture<Void> getCompletionFuture() {
-            return completionFuture;
-        }
-
         public void run() {
 
             if (compareAndSet(false, true)) {
@@ -354,16 +352,12 @@ void doRun() {
 
                     if (throwable != null) {
                         logger.warn("Cannot refresh Redis Cluster topology", throwable);
-                        completionFuture.completeExceptionally(throwable);
-                    } else {
-                        completionFuture.complete(null);
                     }
 
                     set(false);
                 });
             } catch (Exception e) {
                 logger.warn("Cannot refresh Redis Cluster topology", e);
-                completionFuture.completeExceptionally(e);
             }
         }
 

src/main/java/io/lettuce/core/cluster/RedisClusterClient.java

@@ -968,8 +968,8 @@ public CompletionStage<Void> refreshPartitionsAsync() {
      *
      * @since 6.3
      */
-    public void suspendTopologyRefresh() {
-        topologyRefreshScheduler.suspendTopologyRefresh();
+    public CompletableFuture<Void> suspendTopologyRefresh() {
+        return topologyRefreshScheduler.suspendTopologyRefresh();
     }
 
     /**
@@ -1151,15 +1151,7 @@ public void setPartitions(Partitions partitions) {
     @Override
     public CompletableFuture<Void> shutdownAsync(long quietPeriod, long timeout, TimeUnit timeUnit) {
 
-        suspendTopologyRefresh();
-
-        CompletableFuture<Void> topologyRefreshFuture = topologyRefreshScheduler.getTopologyRefreshCompletionFuture();
-
-        return topologyRefreshFuture.thenCompose(ignore -> super.shutdownAsync(quietPeriod, timeout, timeUnit))
-                .exceptionally(ex -> {
-                    System.err.println("Error during topology refresh or shutdown: " + ex.getMessage());
-                    return null;
-                });
+        return suspendTopologyRefresh().thenCompose(voidResult -> super.shutdownAsync(quietPeriod, timeout, timeUnit));
     }
 
     // -------------------------------------------------------------------------