From 2ff02cd333c5d215ddcfe9d0057057161aad660e Mon Sep 17 00:00:00 2001
From: Nicolas Grekas <nicolas.grekas@gmail.com>
Date: Tue, 19 Jun 2018 22:28:47 +0200
Subject: [PATCH] [Cache] added support for phpredis 4 `compression` and
 `tcp_keepalive` options

---
 src/Symfony/Component/Cache/CHANGELOG.md                 | 1 +
 .../Component/Cache/Tests/Adapter/PredisAdapterTest.php  | 2 ++
 src/Symfony/Component/Cache/Traits/RedisTrait.php        | 9 +++++++++
 3 files changed, 12 insertions(+)

diff --git a/src/Symfony/Component/Cache/CHANGELOG.md b/src/Symfony/Component/Cache/CHANGELOG.md
index 2288db8cfebd..98cf028026a6 100644
--- a/src/Symfony/Component/Cache/CHANGELOG.md
+++ b/src/Symfony/Component/Cache/CHANGELOG.md
@@ -6,6 +6,7 @@ CHANGELOG
 
  * added `CacheInterface`, which provides stampede protection via probabilistic early expiration and should become the preferred way to use a cache
  * added sub-second expiry accuracy for backends that support it
+ * added support for phpredis 4 `compression` and `tcp_keepalive` options
  * throw `LogicException` when `CacheItem::tag()` is called on an item coming from a non tag-aware pool
  * deprecated `CacheItem::getPreviousTags()`, use `CacheItem::getMetadata()` instead
  * deprecated the `AbstractAdapter::createSystemCache()` method
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/PredisAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/PredisAdapterTest.php
index c005d64abf1c..b49a15c3bacf 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/PredisAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/PredisAdapterTest.php
@@ -44,6 +44,8 @@ public function testCreateConnection()
             'persistent_id' => null,
             'read_timeout' => 0,
             'retry_interval' => 0,
+            'compression' => true,
+            'tcp_keepalive' => 0,
             'lazy' => false,
             'database' => '1',
             'password' => null,
diff --git a/src/Symfony/Component/Cache/Traits/RedisTrait.php b/src/Symfony/Component/Cache/Traits/RedisTrait.php
index b247b115fa2c..d914de926a66 100644
--- a/src/Symfony/Component/Cache/Traits/RedisTrait.php
+++ b/src/Symfony/Component/Cache/Traits/RedisTrait.php
@@ -34,6 +34,8 @@ trait RedisTrait
         'timeout' => 30,
         'read_timeout' => 0,
         'retry_interval' => 0,
+        'compression' => true,
+        'tcp_keepalive' => 0,
         'lazy' => false,
     );
     private $redis;
@@ -142,6 +144,13 @@ public static function createConnection($dsn, array $options = array())
                     throw new InvalidArgumentException(sprintf('Redis connection failed (%s): %s', $e, $dsn));
                 }
 
+                if (0 < $params['tcp_keepalive'] && \defined('Redis::OPT_TCP_KEEPALIVE')) {
+                    $redis->setOption(\Redis::OPT_TCP_KEEPALIVE, $params['tcp_keepalive']);
+                }
+                if ($params['compression'] && \defined('Redis::COMPRESSION_LZF')) {
+                    $redis->setOption(\Redis::OPT_COMPRESSION, \Redis::COMPRESSION_LZF);
+                }
+
                 return true;
             };