Allow coordinated cross-slot execution using Iterable #303

mget, del and unlink provide methods with var-args signatures and declare signatures accepting Iterable. Only methods accepting varargs allow coordinated cross-slot execution. The other methods accepting Iterable fail because cross-slot keys are sent directly to Redis and not coordinated amongst Redis Cluster nodes.

src/main/java/com/lambdaworks/redis/cluster/RedisAdvancedClusterAsyncCommandsImpl.java

@@ -90,8 +90,8 @@ public RedisFuture<Long> unlink(K... keys) {
     }
 
     @Override
-    public RedisFuture<List<V>> mget(K... keys) {
-        Map<Integer, List<K>> partitioned = SlotHash.partition(codec, Arrays.asList(keys));
+    public RedisFuture<List<V>> mget(Iterable<K> keys) {
+        Map<Integer, List<K>> partitioned = SlotHash.partition(codec, keys);
 
         if (partitioned.size() < 2) {
             return super.mget(keys);
@@ -120,6 +120,11 @@ public RedisFuture<List<V>> mget(K... keys) {
         });
     }
 
+    @Override
+    public RedisFuture<List<V>> mget(K... keys) {
+        return mget(Arrays.asList(keys));
+    }
+
     @Override
     public RedisFuture<Long> mget(ValueStreamingChannel<V> channel, K... keys) {
         Map<Integer, List<K>> partitioned = SlotHash.partition(codec, Arrays.asList(keys));