Feature - RedisNode.size() method added

redisson/src/main/java/org/redisson/api/redisnode/RedisNode.java

@@ -131,4 +131,11 @@ public interface RedisNode {
      */
     void bgRewriteAOF();
 
+    /**
+     * Returns keys amount stored in this Redis node.
+     *
+     * @return keys amount
+     */
+    long size();
+
 }

redisson/src/main/java/org/redisson/api/redisnode/RedisNodeAsync.java

@@ -123,4 +123,11 @@ public interface RedisNodeAsync {
      */
     RFuture<Void> bgRewriteAOFAsync();
 
+    /**
+     * Returns keys amount stored in this Redis node.
+     *
+     * @return keys amount
+     */
+    RFuture<Long> sizeAsync();
+
 }

redisson/src/main/java/org/redisson/redisnode/RedisNode.java

@@ -389,4 +389,15 @@ public class RedisNode implements RedisClusterMaster, RedisClusterSlave, RedisMa
     public RFuture<Void> bgRewriteAOFAsync() {
         return commandExecutor.writeAsync(client, StringCodec.INSTANCE, RedisCommands.BGREWRITEAOF);
     }
+
+    @Override
+    public long size() {
+        return commandExecutor.get(sizeAsync());
+    }
+
+    @Override
+    public RFuture<Long> sizeAsync() {
+        return commandExecutor.writeAsync(client, StringCodec.INSTANCE, RedisCommands.DBSIZE);
+    }
+
 }

redisson/src/main/java/org/redisson/redisnode/SentinelRedisNode.java

@@ -320,4 +320,15 @@ public class SentinelRedisNode implements RedisSentinel, RedisSentinelAsync {
     public RFuture<Void> bgRewriteAOFAsync() {
         return executeAsync(null, StringCodec.INSTANCE, -1, RedisCommands.BGREWRITEAOF);
     }
+
+    @Override
+    public long size() {
+        return commandAsyncService.get(sizeAsync());
+    }
+
+    @Override
+    public RFuture<Long> sizeAsync() {
+        return executeAsync(null, StringCodec.INSTANCE, -1, RedisCommands.DBSIZE);
+    }
+
 }