added RabbitMQ and Redis checks

Author: kbond

composer.json

@@ -28,7 +28,9 @@
         "ext-bcmath" : "Required by Check\\CpuPerformance",
         "sensiolabs/security-checker": "Required by Check\\SecurityAdvisory",
         "symfony/yaml": "Required by Check\\YamlFile",
-        "guzzle/http": "Required by Check\\GuzzleHttpService"
+        "guzzle/http": "Required by Check\\GuzzleHttpService",
+        "predis/predis": "Required by Check\\Redis",
+        "videlalvaro/php-amqplib": "TRequired by Check\\RabbitMQ"
     },
     "extra": {
         "branch-alias": {

src/ZendDiagnostics/Check/RabbitMQ.php

@@ -0,0 +1,89 @@
+<?php
+/**
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace ZendDiagnostics\Check;
+
+use PhpAmqpLib\Connection\AMQPConnection;
+use ZendDiagnostics\Result\Failure;
+use ZendDiagnostics\Result\Success;
+
+/**
+ * Validate that a RabbitMQ service is running
+ *
+ * @author Cédric Dugat <[email protected]>
+ */
+class RabbitMQ extends AbstractCheck
+{
+    /**
+     * @var string
+     */
+    protected $host;
+
+    /**
+     * @var integer
+     */
+    protected $port;
+
+    /**
+     * @var string
+     */
+    protected $user;
+
+    /**
+     * @var string
+     */
+    protected $password;
+
+    /**
+     * @var string
+     */
+    protected $vhost;
+
+    /**
+     * @param string  $host
+     * @param integer $port
+     * @param string  $user
+     * @param string  $password
+     * @param string  $vhost
+     */
+    public function __construct(
+        $host = 'localhost',
+        $port = 5672,
+        $user = 'guest',
+        $password = 'guest',
+        $vhost = '/'
+    ) {
+        $this->host     = $host;
+        $this->port     = $port;
+        $this->user     = $user;
+        $this->password = $password;
+        $this->vhost    = $vhost;
+    }
+
+    /**
+     * Perform the check
+     *
+     * @see \ZendDiagnostics\Check\CheckInterface::check()
+     * @return Failure|Success
+     */
+    public function check()
+    {
+        if (!class_exists('PhpAmqpLib\Connection\AMQPConnection', false)) {
+            return new Failure('PhpAmqpLib is not installed');
+        }
+
+        $conn = new AMQPConnection(
+            $this->host,
+            $this->port,
+            $this->user,
+            $this->password,
+            $this->vhost
+        );
+
+        $conn->channel();
+
+        return new Success();
+    }
+}

src/ZendDiagnostics/Check/Redis.php

@@ -0,0 +1,68 @@
+<?php
+/**
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace ZendDiagnostics\Check;
+
+use Predis\Client;
+use ZendDiagnostics\Result\Failure;
+use ZendDiagnostics\Result\Success;
+
+/**
+ * Validate that a Redis service is running
+ *
+ * @author Cédric Dugat <[email protected]>
+ */
+class Redis extends AbstractCheck
+{
+    /**
+     * @var string
+     */
+    protected $host;
+
+    /**
+     * @var int
+     */
+    protected $port;
+
+    /**
+     * @param string  $host
+     * @param int $port
+     */
+    public function __construct($host = 'localhost', $port = 6379)
+    {
+        $this->host = $host;
+        $this->port = $port;
+    }
+
+    /**
+     * Perform the check
+     *
+     * @see \ZendDiagnostics\Check\CheckInterface::check()
+     * @return Failure|Success
+     */
+    public function check()
+    {
+        if (!class_exists('Predis\Client', false)) {
+            return new Failure('Predis is not installed');
+        }
+
+        $client = new Client(array(
+            'host' => $this->host,
+            'port' => $this->port,
+        ));
+
+        if (!$client->ping()) {
+            return new Failure(
+                sprintf(
+                    'No Redis server running at host %s on port %s',
+                    $this->host,
+                    $this->port
+                )
+            );
+        }
+
+        return new Success();
+    }
+}