Change how Redis errors such as -ERR replies generates exceptions.

The "throw_errors" connection parameter has been removed and replaced by the
new "exceptions" client option since exceptions on -ERR replies returned by
Redis are not generated by connection classes anymore but are thrown by the
client class and other abstractions such as pipeline contexts.

This change does not affect much people using the Predis\Client class (aside
from the different configuration) but gives much more flexibility to those
building their own pieces of code around the internal classes of Predis.

lib/Predis/Connection/StreamConnection.php

@@ -13,7 +13,6 @@ namespace Predis\Connection;
 
 use Predis\ResponseError;
 use Predis\ResponseQueued;
-use Predis\ServerException;
 use Predis\NotSupportedException;
 use Predis\ConnectionParametersInterface;
 use Predis\Command\CommandInterface;
@@ -30,7 +29,6 @@ use Predis\Iterator\MultiBulkResponseSimple;
  *  - read_write_timeout: timeout of read / write operations.
  *  - async_connect: performs the connection asynchronously.
  *  - persistent: the connection is left intact after a GC collection.
- *  - throw_errors: -ERR replies treated as exceptions.
  *  - iterable_multibulk: multibulk replies treated as iterable objects.
  *
  * @author Daniele Alessandri <suppakilla@gmail.com>
@@ -38,7 +36,6 @@ use Predis\Iterator\MultiBulkResponseSimple;
 class StreamConnection extends AbstractConnection
 {
     private $mbiterable;
-    private $throwErrors;
 
     /**
      * Disconnects from the server and destroys the underlying resource when
@@ -57,7 +54,6 @@ class StreamConnection extends AbstractConnection
      */
     protected function initializeProtocol(ConnectionParametersInterface $parameters)
     {
-        $this->throwErrors = (bool) $parameters->throw_errors;
         $this->mbiterable = (bool) $parameters->iterable_multibulk;
     }
 
@@ -264,9 +260,6 @@ class StreamConnection extends AbstractConnection
                 return (int) $payload;
 
             case '-':    // error
-                if ($this->throwErrors) {
-                    throw new ServerException($payload);
-                }
                 return new ResponseError($payload);
 
             default:
@@ -301,6 +294,6 @@ class StreamConnection extends AbstractConnection
      */
     public function __sleep()
     {
-        return array_merge(parent::__sleep(), array('mbiterable', 'throwErrors'));
+        return array_merge(parent::__sleep(), array('mbiterable'));
     }
 }