Moved cache drivers outside core to extensions (plugins)

plugins/cache-redis/Predis/Connection/CompositeStreamConnection.php

@@ -0,0 +1,125 @@
+<?php
+
+/*
+ * This file is part of the Predis package.
+ *
+ * (c) Daniele Alessandri <suppakilla@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Predis\Connection;
+
+use Predis\Command\CommandInterface;
+use Predis\Protocol\ProtocolProcessorInterface;
+use Predis\Protocol\Text\ProtocolProcessor as TextProtocolProcessor;
+
+/**
+ * Connection abstraction to Redis servers based on PHP's stream that uses an
+ * external protocol processor defining the protocol used for the communication.
+ *
+ * @author Daniele Alessandri <suppakilla@gmail.com>
+ */
+class CompositeStreamConnection extends StreamConnection implements CompositeConnectionInterface
+{
+    protected $protocol;
+
+    /**
+     * @param ParametersInterface        $parameters Initialization parameters for the connection.
+     * @param ProtocolProcessorInterface $protocol   Protocol processor.
+     */
+    public function __construct(
+        ParametersInterface $parameters,
+        ProtocolProcessorInterface $protocol = null
+    ) {
+        $this->parameters = $this->assertParameters($parameters);
+        $this->protocol = $protocol ?: new TextProtocolProcessor();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getProtocol()
+    {
+        return $this->protocol;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function writeBuffer($buffer)
+    {
+        $this->write($buffer);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function readBuffer($length)
+    {
+        if ($length <= 0) {
+            throw new \InvalidArgumentException('Length parameter must be greater than 0.');
+        }
+
+        $value = '';
+        $socket = $this->getResource();
+
+        do {
+            $chunk = fread($socket, $length);
+
+            if ($chunk === false || $chunk === '') {
+                $this->onConnectionError('Error while reading bytes from the server.');
+            }
+
+            $value .= $chunk;
+        } while (($length -= strlen($chunk)) > 0);
+
+        return $value;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function readLine()
+    {
+        $value = '';
+        $socket = $this->getResource();
+
+        do {
+            $chunk = fgets($socket);
+
+            if ($chunk === false || $chunk === '') {
+                $this->onConnectionError('Error while reading line from the server.');
+            }
+
+            $value .= $chunk;
+        } while (substr($value, -2) !== "\r\n");
+
+        return substr($value, 0, -2);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function writeRequest(CommandInterface $command)
+    {
+        $this->protocol->write($this, $command);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function read()
+    {
+        return $this->protocol->read($this);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __sleep()
+    {
+        return array_merge(parent::__sleep(), array('protocol'));
+    }
+}