Add the Predis\ICommand interface.

lib/Predis.php

@@ -208,11 +208,11 @@ class Client {
         return $this->_serverProfile->createCommand($method, $arguments);
     }
 
-    public function executeCommand(Command $command) {
+    public function executeCommand(ICommand $command) {
         return $this->_connection->executeCommand($command);
     }
 
-    public function executeCommandOnShards(Command $command) {
+    public function executeCommandOnShards(ICommand $command) {
         $replies = array();
         if (Shared\Utils::isCluster($this->_connection)) {
             foreach($this->_connection as $connection) {
@@ -428,10 +428,19 @@ class Protocol {
     const PREFIX_MULTI_BULK = '*';
 }
 
-abstract class Command {
-    private $_arguments, $_hash;
+interface ICommand {
+    public function getCommandId();
+    public function canBeHashed();
+    public function closesConnection();
+    public function getHash(Distribution\IDistributionStrategy $distributor);
+    public function setArgumentsArray(Array $arguments);
+    public function getArguments();
+    public function parseResponse($data);
+    public function serialize();
+}
 
-    public abstract function getCommandId();
+abstract class Command implements ICommand {
+    private $_arguments, $_hash;
 
     protected function serializeRequest($command, $arguments) {
         $newline = Protocol::NEWLINE;
@@ -722,7 +731,7 @@ class CommandPipeline {
         return $this;
     }
 
-    private function recordCommand(Command $command) {
+    private function recordCommand(ICommand $command) {
         $this->_pipelineBuffer[] = $command;
     }
 
@@ -1190,9 +1199,9 @@ interface IConnection {
     public function connect();
     public function disconnect();
     public function isConnected();
-    public function writeCommand(Command $command);
-    public function readResponse(Command $command);
-    public function executeCommand(Command $command);
+    public function writeCommand(ICommand $command);
+    public function readResponse(ICommand $command);
+    public function executeCommand(ICommand $command);
 }
 
 interface IConnectionSingle extends IConnection {
@@ -1202,7 +1211,7 @@ interface IConnectionSingle extends IConnection {
 }
 
 interface IConnectionCluster extends IConnection {
-    public function getConnection(Command $command);
+    public function getConnection(ICommand $command);
     public function getConnectionById($connectionId);
 }
 
@@ -1308,7 +1317,7 @@ class TcpConnection implements IConnectionSingle {
         }
     }
 
-    public function pushInitCommand(Command $command){
+    public function pushInitCommand(ICommand $command){
         $this->_initCmds[] = $command;
     }
 
@@ -1327,17 +1336,17 @@ class TcpConnection implements IConnectionSingle {
         );
     }
 
-    public function writeCommand(Command $command) {
+    public function writeCommand(ICommand $command) {
         $this->writeBytes($command->serialize());
     }
 
-    public function readResponse(Command $command) {
+    public function readResponse(ICommand $command) {
         $response = $this->_reader->read($this);
         $skipparse = isset($response->queued) || isset($response->error);
         return $skipparse ? $response : $command->parseResponse($response);
     }
 
-    public function executeCommand(Command $command) {
+    public function executeCommand(ICommand $command) {
         $this->writeCommand($command);
         if ($command->closesConnection()) {
             return $this->disconnect();
@@ -1460,7 +1469,7 @@ class ConnectionCluster implements IConnectionCluster, \IteratorAggregate {
         $this->_distributor->add($connection, $parameters->weight);
     }
 
-    public function getConnection(Command $command) {
+    public function getConnection(ICommand $command) {
         if ($command->canBeHashed() === false) {
             throw new ClientException(
                 sprintf("Cannot send '%s' commands to a cluster of connections", $command->getCommandId())
@@ -1478,15 +1487,15 @@ class ConnectionCluster implements IConnectionCluster, \IteratorAggregate {
         return new \ArrayIterator($this->_pool);
     }
 
-    public function writeCommand(Command $command) {
+    public function writeCommand(ICommand $command) {
         $this->getConnection($command)->writeCommand($command);
     }
 
-    public function readResponse(Command $command) {
+    public function readResponse(ICommand $command) {
         return $this->getConnection($command)->readResponse($command);
     }
 
-    public function executeCommand(Command $command) {
+    public function executeCommand(ICommand $command) {
         $connection = $this->getConnection($command);
         $connection->writeCommand($command);
         return $connection->readResponse($command);