diff --git a/lib/Predis/Commands/Auth.php b/lib/Predis/Commands/Auth.php
index 9c09580b..966382d2 100644
--- a/lib/Predis/Commands/Auth.php
+++ b/lib/Predis/Commands/Auth.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class Auth extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'AUTH'; }
 }
diff --git a/lib/Predis/Commands/BackgroundRewriteAppendOnlyFile.php b/lib/Predis/Commands/BackgroundRewriteAppendOnlyFile.php
index 55ca89e2..61c10ad0 100644
--- a/lib/Predis/Commands/BackgroundRewriteAppendOnlyFile.php
+++ b/lib/Predis/Commands/BackgroundRewriteAppendOnlyFile.php
@@ -3,7 +3,7 @@
 namespace Predis\Commands;
 
 class BackgroundRewriteAppendOnlyFile extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'BGREWRITEAOF'; }
     public function parseResponse($data) {
         return $data == 'Background append only file rewriting started';
diff --git a/lib/Predis/Commands/BackgroundSave.php b/lib/Predis/Commands/BackgroundSave.php
index c166d4fc..c65eb9f5 100644
--- a/lib/Predis/Commands/BackgroundSave.php
+++ b/lib/Predis/Commands/BackgroundSave.php
@@ -3,7 +3,7 @@
 namespace Predis\Commands;
 
 class BackgroundSave extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'BGSAVE'; }
     public function parseResponse($data) {
         if ($data == 'Background saving started') {
diff --git a/lib/Predis/Commands/Command.php b/lib/Predis/Commands/Command.php
index b5407370..ce904b70 100644
--- a/lib/Predis/Commands/Command.php
+++ b/lib/Predis/Commands/Command.php
@@ -8,8 +8,8 @@ abstract class Command implements ICommand {
     private $_hash;
     private $_arguments = array();
 
-    public function canBeHashed() {
-        return true;
+    protected function canBeHashed() {
+        return isset($this->_arguments[0]);
     }
 
     protected function getHashablePart($key) {
@@ -27,15 +27,12 @@ abstract class Command implements ICommand {
         if (isset($this->_hash)) {
             return $this->_hash;
         }
-        if (!$this->canBeHashed()) {
-            return null;
+        if ($this->canBeHashed()) {
+            $key = $this->getHashablePart($this->_arguments[0]);
+            $this->_hash = $distributor->generateKey($key);
+            return $this->_hash;
         }
-        if (!isset($this->_arguments[0])) {
-            return null;
-        }
-        $key = $this->getHashablePart($this->_arguments[0]);
-        $this->_hash = $distributor->generateKey($key);
-        return $this->_hash;
+        return null;
     }
 
     protected function filterArguments(Array $arguments) {
diff --git a/lib/Predis/Commands/Config.php b/lib/Predis/Commands/Config.php
index 122d4fdf..2dde0c25 100644
--- a/lib/Predis/Commands/Config.php
+++ b/lib/Predis/Commands/Config.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class Config extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'CONFIG'; }
 }
diff --git a/lib/Predis/Commands/DatabaseSize.php b/lib/Predis/Commands/DatabaseSize.php
index 7a1e3aaf..b2c404c6 100644
--- a/lib/Predis/Commands/DatabaseSize.php
+++ b/lib/Predis/Commands/DatabaseSize.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class DatabaseSize extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'DBSIZE'; }
 }
diff --git a/lib/Predis/Commands/Discard.php b/lib/Predis/Commands/Discard.php
index f73312ab..d0177cfd 100644
--- a/lib/Predis/Commands/Discard.php
+++ b/lib/Predis/Commands/Discard.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class Discard extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'DISCARD'; }
 }
diff --git a/lib/Predis/Commands/DoEcho.php b/lib/Predis/Commands/DoEcho.php
index a929d9c7..5caa4ec8 100644
--- a/lib/Predis/Commands/DoEcho.php
+++ b/lib/Predis/Commands/DoEcho.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class DoEcho extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'ECHO'; }
 }
diff --git a/lib/Predis/Commands/Exec.php b/lib/Predis/Commands/Exec.php
index 7bef7edd..99e6a851 100644
--- a/lib/Predis/Commands/Exec.php
+++ b/lib/Predis/Commands/Exec.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class Exec extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'EXEC'; }
 }
diff --git a/lib/Predis/Commands/FlushAll.php b/lib/Predis/Commands/FlushAll.php
index c9a97317..1eb6bd61 100644
--- a/lib/Predis/Commands/FlushAll.php
+++ b/lib/Predis/Commands/FlushAll.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class FlushAll extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'FLUSHALL'; }
 }
diff --git a/lib/Predis/Commands/FlushDatabase.php b/lib/Predis/Commands/FlushDatabase.php
index 084d0647..448efb08 100644
--- a/lib/Predis/Commands/FlushDatabase.php
+++ b/lib/Predis/Commands/FlushDatabase.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class FlushDatabase extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'FLUSHDB'; }
 }
diff --git a/lib/Predis/Commands/GetMultiple.php b/lib/Predis/Commands/GetMultiple.php
index 212b5ab3..8a557ffc 100644
--- a/lib/Predis/Commands/GetMultiple.php
+++ b/lib/Predis/Commands/GetMultiple.php
@@ -5,7 +5,7 @@ namespace Predis\Commands;
 use Predis\Utils;
 
 class GetMultiple extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'MGET'; }
     public function filterArguments(Array $arguments) {
         return Utils::filterArrayArguments($arguments);
diff --git a/lib/Predis/Commands/ICommand.php b/lib/Predis/Commands/ICommand.php
index 37440a1f..bdd6b835 100644
--- a/lib/Predis/Commands/ICommand.php
+++ b/lib/Predis/Commands/ICommand.php
@@ -6,7 +6,6 @@ use Predis\Distribution\IDistributionStrategy;
 
 interface ICommand {
     public function getId();
-    public function canBeHashed();
     public function getHash(IDistributionStrategy $distributor);
     public function setArgumentsArray(Array $arguments);
     public function getArguments();
diff --git a/lib/Predis/Commands/Info.php b/lib/Predis/Commands/Info.php
index a495d8cc..a300e5a3 100644
--- a/lib/Predis/Commands/Info.php
+++ b/lib/Predis/Commands/Info.php
@@ -3,7 +3,7 @@
 namespace Predis\Commands;
 
 class Info extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'INFO'; }
     public function parseResponse($data) {
         $info      = array();
diff --git a/lib/Predis/Commands/InfoV24x.php b/lib/Predis/Commands/InfoV24x.php
index a9eb2342..f27645e1 100644
--- a/lib/Predis/Commands/InfoV24x.php
+++ b/lib/Predis/Commands/InfoV24x.php
@@ -3,7 +3,6 @@
 namespace Predis\Commands;
 
 class InfoV24x extends Info {
-    public function canBeHashed()  { return false; }
     public function parseResponse($data) {
         $info      = array();
         $current   = null;
diff --git a/lib/Predis/Commands/Keys.php b/lib/Predis/Commands/Keys.php
index d7c8e5f3..339ba662 100644
--- a/lib/Predis/Commands/Keys.php
+++ b/lib/Predis/Commands/Keys.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class Keys extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'KEYS'; }
 }
diff --git a/lib/Predis/Commands/LastSave.php b/lib/Predis/Commands/LastSave.php
index 46e7fe32..4f8a6638 100644
--- a/lib/Predis/Commands/LastSave.php
+++ b/lib/Predis/Commands/LastSave.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class LastSave extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'LASTSAVE'; }
 }
diff --git a/lib/Predis/Commands/MoveKey.php b/lib/Predis/Commands/MoveKey.php
index 833dd3de..b343dbc5 100644
--- a/lib/Predis/Commands/MoveKey.php
+++ b/lib/Predis/Commands/MoveKey.php
@@ -3,7 +3,7 @@
 namespace Predis\Commands;
 
 class MoveKey extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'MOVE'; }
     public function parseResponse($data) { return (bool) $data; }
 }
diff --git a/lib/Predis/Commands/Multi.php b/lib/Predis/Commands/Multi.php
index 9e8d1fb5..4a4383e5 100644
--- a/lib/Predis/Commands/Multi.php
+++ b/lib/Predis/Commands/Multi.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class Multi extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'MULTI'; }
 }
diff --git a/lib/Predis/Commands/Ping.php b/lib/Predis/Commands/Ping.php
index 0810a012..e6efd65e 100644
--- a/lib/Predis/Commands/Ping.php
+++ b/lib/Predis/Commands/Ping.php
@@ -3,7 +3,7 @@
 namespace Predis\Commands;
 
 class Ping extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'PING'; }
     public function parseResponse($data) {
         return $data === 'PONG' ? true : false;
diff --git a/lib/Predis/Commands/Publish.php b/lib/Predis/Commands/Publish.php
index 5e1a437b..74f35639 100644
--- a/lib/Predis/Commands/Publish.php
+++ b/lib/Predis/Commands/Publish.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class Publish extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'PUBLISH'; }
 }
diff --git a/lib/Predis/Commands/Quit.php b/lib/Predis/Commands/Quit.php
index cd86fa57..a53faa9f 100644
--- a/lib/Predis/Commands/Quit.php
+++ b/lib/Predis/Commands/Quit.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class Quit extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'QUIT'; }
 }
diff --git a/lib/Predis/Commands/RandomKey.php b/lib/Predis/Commands/RandomKey.php
index 23ef952f..a8ec603c 100644
--- a/lib/Predis/Commands/RandomKey.php
+++ b/lib/Predis/Commands/RandomKey.php
@@ -3,7 +3,7 @@
 namespace Predis\Commands;
 
 class RandomKey extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'RANDOMKEY'; }
     public function parseResponse($data) { return $data !== '' ? $data : null; }
 }
diff --git a/lib/Predis/Commands/Rename.php b/lib/Predis/Commands/Rename.php
index 1cd8ea03..f6a973cd 100644
--- a/lib/Predis/Commands/Rename.php
+++ b/lib/Predis/Commands/Rename.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class Rename extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'RENAME'; }
 }
diff --git a/lib/Predis/Commands/RenamePreserve.php b/lib/Predis/Commands/RenamePreserve.php
index e6684bd8..f88e4190 100644
--- a/lib/Predis/Commands/RenamePreserve.php
+++ b/lib/Predis/Commands/RenamePreserve.php
@@ -3,7 +3,7 @@
 namespace Predis\Commands;
 
 class RenamePreserve extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'RENAMENX'; }
     public function parseResponse($data) { return (bool) $data; }
 }
diff --git a/lib/Predis/Commands/Save.php b/lib/Predis/Commands/Save.php
index b10c1ebe..6d8f675f 100644
--- a/lib/Predis/Commands/Save.php
+++ b/lib/Predis/Commands/Save.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class Save extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'SAVE'; }
 }
diff --git a/lib/Predis/Commands/SelectDatabase.php b/lib/Predis/Commands/SelectDatabase.php
index 851c4433..fa3b6785 100644
--- a/lib/Predis/Commands/SelectDatabase.php
+++ b/lib/Predis/Commands/SelectDatabase.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class SelectDatabase extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'SELECT'; }
 }
diff --git a/lib/Predis/Commands/SetIntersection.php b/lib/Predis/Commands/SetIntersection.php
index 6cd7740a..e2484665 100644
--- a/lib/Predis/Commands/SetIntersection.php
+++ b/lib/Predis/Commands/SetIntersection.php
@@ -5,6 +5,7 @@ namespace Predis\Commands;
 use Predis\Utils;
 
 class SetIntersection extends Command {
+    protected function canBeHashed() { return false; }
     public function getId() { return 'SINTER'; }
     public function filterArguments(Array $arguments) {
         return Utils::filterArrayArguments($arguments);
diff --git a/lib/Predis/Commands/SetIntersectionStore.php b/lib/Predis/Commands/SetIntersectionStore.php
index dc0087a6..78ea568c 100644
--- a/lib/Predis/Commands/SetIntersectionStore.php
+++ b/lib/Predis/Commands/SetIntersectionStore.php
@@ -5,6 +5,7 @@ namespace Predis\Commands;
 use Predis\Utils;
 
 class SetIntersectionStore extends Command {
+    protected function canBeHashed() { return false; }
     public function getId() { return 'SINTERSTORE'; }
     public function filterArguments(Array $arguments) {
         return Utils::filterArrayArguments($arguments);
diff --git a/lib/Predis/Commands/SetMove.php b/lib/Predis/Commands/SetMove.php
index f5d52d81..e5ed7748 100644
--- a/lib/Predis/Commands/SetMove.php
+++ b/lib/Predis/Commands/SetMove.php
@@ -3,7 +3,7 @@
 namespace Predis\Commands;
 
 class SetMove extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'SMOVE'; }
     public function parseResponse($data) { return (bool) $data; }
 }
diff --git a/lib/Predis/Commands/SetMultiple.php b/lib/Predis/Commands/SetMultiple.php
index 8a102d81..f26977ff 100644
--- a/lib/Predis/Commands/SetMultiple.php
+++ b/lib/Predis/Commands/SetMultiple.php
@@ -3,7 +3,7 @@
 namespace Predis\Commands;
 
 class SetMultiple extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'MSET'; }
     public function filterArguments(Array $arguments) {
         if (count($arguments) === 1 && is_array($arguments[0])) {
diff --git a/lib/Predis/Commands/SetMultiplePreserve.php b/lib/Predis/Commands/SetMultiplePreserve.php
index 5f5850df..d2d93677 100644
--- a/lib/Predis/Commands/SetMultiplePreserve.php
+++ b/lib/Predis/Commands/SetMultiplePreserve.php
@@ -3,7 +3,6 @@
 namespace Predis\Commands;
 
 class SetMultiplePreserve extends SetMultiple {
-    public function canBeHashed()  { return false; }
     public function getId() { return 'MSETNX'; }
     public function parseResponse($data) { return (bool) $data; }
 }
diff --git a/lib/Predis/Commands/Shutdown.php b/lib/Predis/Commands/Shutdown.php
index e300357b..33e48807 100644
--- a/lib/Predis/Commands/Shutdown.php
+++ b/lib/Predis/Commands/Shutdown.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class Shutdown extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'SHUTDOWN'; }
 }
diff --git a/lib/Predis/Commands/SlaveOf.php b/lib/Predis/Commands/SlaveOf.php
index 92697d77..2067baac 100644
--- a/lib/Predis/Commands/SlaveOf.php
+++ b/lib/Predis/Commands/SlaveOf.php
@@ -3,7 +3,7 @@
 namespace Predis\Commands;
 
 class SlaveOf extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'SLAVEOF'; }
     public function filterArguments(Array $arguments) {
         if (count($arguments) === 0 || $arguments[0] === 'NO ONE') {
diff --git a/lib/Predis/Commands/Subscribe.php b/lib/Predis/Commands/Subscribe.php
index 8122422a..0919cd4a 100644
--- a/lib/Predis/Commands/Subscribe.php
+++ b/lib/Predis/Commands/Subscribe.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class Subscribe extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'SUBSCRIBE'; }
 }
diff --git a/lib/Predis/Commands/SubscribeByPattern.php b/lib/Predis/Commands/SubscribeByPattern.php
index c1f17185..ac2fdf07 100644
--- a/lib/Predis/Commands/SubscribeByPattern.php
+++ b/lib/Predis/Commands/SubscribeByPattern.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class SubscribeByPattern extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'PSUBSCRIBE'; }
 }
diff --git a/lib/Predis/Commands/Unsubscribe.php b/lib/Predis/Commands/Unsubscribe.php
index 7ee9ef40..ac854212 100644
--- a/lib/Predis/Commands/Unsubscribe.php
+++ b/lib/Predis/Commands/Unsubscribe.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class Unsubscribe extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'UNSUBSCRIBE'; }
 }
diff --git a/lib/Predis/Commands/UnsubscribeByPattern.php b/lib/Predis/Commands/UnsubscribeByPattern.php
index a3211b79..bc02da47 100644
--- a/lib/Predis/Commands/UnsubscribeByPattern.php
+++ b/lib/Predis/Commands/UnsubscribeByPattern.php
@@ -3,6 +3,6 @@
 namespace Predis\Commands;
 
 class UnsubscribeByPattern extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'PUNSUBSCRIBE'; }
 }
diff --git a/lib/Predis/Commands/Unwatch.php b/lib/Predis/Commands/Unwatch.php
index 1cdeb164..a476a169 100644
--- a/lib/Predis/Commands/Unwatch.php
+++ b/lib/Predis/Commands/Unwatch.php
@@ -3,7 +3,7 @@
 namespace Predis\Commands;
 
 class Unwatch extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'UNWATCH'; }
     public function parseResponse($data) { return (bool) $data; }
 }
diff --git a/lib/Predis/Commands/Watch.php b/lib/Predis/Commands/Watch.php
index cc629ea0..a8c57c4c 100644
--- a/lib/Predis/Commands/Watch.php
+++ b/lib/Predis/Commands/Watch.php
@@ -3,7 +3,7 @@
 namespace Predis\Commands;
 
 class Watch extends Command {
-    public function canBeHashed()  { return false; }
+    protected function canBeHashed() { return false; }
     public function getId() { return 'WATCH'; }
     public function filterArguments(Array $arguments) {
         if (isset($arguments[0]) && is_array($arguments[0])) {
diff --git a/lib/Predis/Commands/ZSetIntersectionStore.php b/lib/Predis/Commands/ZSetIntersectionStore.php
index 11bc9e91..8e8b6a09 100644
--- a/lib/Predis/Commands/ZSetIntersectionStore.php
+++ b/lib/Predis/Commands/ZSetIntersectionStore.php
@@ -3,5 +3,6 @@
 namespace Predis\Commands;
 
 class ZSetIntersectionStore extends ZSetUnionStore {
+    protected function canBeHashed() { return false; }
     public function getId() { return 'ZINTERSTORE'; }
 }
diff --git a/lib/Predis/Commands/ZSetUnionStore.php b/lib/Predis/Commands/ZSetUnionStore.php
index 790b79e1..aed60729 100644
--- a/lib/Predis/Commands/ZSetUnionStore.php
+++ b/lib/Predis/Commands/ZSetUnionStore.php
@@ -3,6 +3,7 @@
 namespace Predis\Commands;
 
 class ZSetUnionStore extends Command {
+    protected function canBeHashed() { return false; }
     public function getId() { return 'ZUNIONSTORE'; }
     public function filterArguments(Array $arguments) {
         $options = array();