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[CACHE][Redis] Add special support for redis (fixed size lists), set method and general fixes

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This commit is contained in:
Hugo Sales 2020-07-16 00:04:25 +00:00 committed by Hugo Sales
parent c602cf8422
commit 31ad75564f
Signed by: someonewithpc
GPG Key ID: 7D0C7EAFC9D835A0
1 changed files with 92 additions and 33 deletions
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125
src/Core/Cache.php
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@ -1,6 +1,7 @@
<?php
// {{{ License
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
@ -15,17 +16,18 @@
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
// }}}
namespace App\Core;
use Functional as F;
use Symfony\Component\Cache\Adapter\AbstractAdapter;
use Symfony\Component\Cache\Adapter\ChainAdapter;
abstract class Cache
{
protected static AbstractAdapter $pools;
protected static $pools;
protected static $redis;
private static string $ENV_VAR = 'SOCIAL_CACHE_ADAPTER';
/**
@ -39,29 +41,57 @@ abstract class Cache
die("A cache adapter is needed in the environment variable {$ENV_VAR}");
}
self::$pools = [];
self::$redis = [];
$adapters = [];
foreach (explode(';', $_ENV[self::$ENV_VAR]) as $a) {
list($pool, $val) = explode('=', $a);
list($pool, $val) = explode('=', $a);
self::$pools[$pool] = [];
self::$redis[$pool] = [];
foreach (explode(',', $val) as $dsn) {
list($scheme, $rest) = explode('://', $dsn);
$partial_to_dsn = function ($r) use ($scheme) { return $scheme . '://' . $r; };
switch ($scheme) {
case 'redis':
// Redis can have multiple servers, but we want to take proper advantage of
// redis, not just as a key value store, but using it's datastructures
$dsns = F\map(explode(',', $rest),
function ($r) use ($partial_to_dsn) {
// May be a Unix socket
return $r[0] == '/' ? $r : $partial_to_dsn($r);
});
if (count($dsns) === 1) {
$class = \Redis;
$r = new \Redis(array_pop($dsns));
} else {
$class = \RedisCluster;
$r = new \RedisCluster($dsns);
}
// Distribute reads randomly
$r->setOption($class::OPT_SLAVE_FAILOVER, $class::FAILOVER_DISTRIBUTE);
// Improved serializer
$r->setOption($class::OPT_SERIALIZER, $class::SERIALIZER_MSGPACK);
// Persistent connection
$r->setOption($class::OPT_TCP_KEEPALIVE, true);
// Use LZ4 for the improved decompression speed (while keeping an okay compression ratio)
$r->setOption($class::OPT_COMPRESSION, $class::COMPRESSION_LZ4);
self::$redis[$pool][] = $r;
$adapters[$pool][] = new Adapter\RedisAdapter($r);
break;
case 'memcached':
// memcached can have multiple servers
$dsn = F\map(explode(',', $rest), function ($h) use ($scheme) { return $scheme . $h; });
$adapters[$pool][] = new Adapter\MemcachedAdapter($dsn);
// memcached can also have multiple servers
$dsns = F\map(explode(',', $rest), $partial_to_dsn);
$adapters[$pool][] = new Adapter\MemcachedAdapter($dsns);
break;
case 'filesystem':
$adapters[$pool][] = new Adapter\FilesystemAdapter($rest);
break;
case 'redis':
$adapters[$pool][] = new Adapter\RedisAdapter($dsn);
break;
case 'apcu':
$adapters[$pool][] = new Adapter\ApcuAdapter();
break;
case 'opcache':
$adapters[$pool][] = new Adapter\PhpArrayAdapter(stream_get_meta_data(tmpfile())['uri'], new FilesystemAdapter());
$adapters[$pool][] = new Adapter\PhpArrayAdapter($rest, new FilesystemAdapter($rest . '.fallback'));
break;
case 'doctrine':
$adapters[$pool][] = new Adapter\PdoAdapter($dsn);
@ -71,6 +101,7 @@ abstract class Cache
return;
}
}
if (count($adapters[$pool]) === 1) {
self::$pools[$pool] = array_pop($adapters[$pool]);
} else {
@ -79,41 +110,69 @@ abstract class Cache
}
}
public static function set(string $key, mixed $value, string $pool = 'default')
{
// there's no set method, must be done this way
return self::$pools[$pool]->get($key, function ($i) use ($value) { return $value; }, INF);
}
public static function get(string $key, callable $calculate, string $pool = 'default', float $beta = 1.0)
{
if (self::$pools[$pool] instanceof AbstractAdapter) {
return self::$pool->get($key, $calculate, $beta);
return self::$pools[$pool]->get($key, $calculate, $beta);
}
public static function delete(string $key, string $pool = 'default'): bool
{
return self::$pools[$pool]->delete($key);
}
public static function getList(string $key, callable $calculate, string $pool = 'default', int $max_count = 64, float $beta = 1.0): SplFixedArray
{
if (isset(self::$redis[$pool])) {
return SplFixedArray::fromArray(self::$redis[$pool]->lRange($key, 0, -1));
} else {
$keys = self::getKeyList($key, $max_count, $beta);
$list = new SplFixedArray($keys->count());
foreach ($keys as $k) {
$list[] = self::get($k, $calculate, $pool, $beta);
}
return $list;
}
}
public static function delete(string $key): bool
public static function pushList(string $key, mixed $value, string $pool = 'default', int $max_count = 64, float $beta = 1.0): void
{
return self::$pool->delete($key);
}
public static function getList(string $key, callable $calculate, int $max_count = 64, float $beta = 1.0): SplFixedArray
{
$keys = self::getKeyList($key, $max_count, $beta);
$list = new SplFixedArray($keys->count());
foreach ($keys as $k) {
$list[] = self::get($k, $calculate, $beta);
if (isset(self::$redis[$pool])) {
self::$redis[$pool]
// doesn't need to be atomic, adding at one end, deleting at the other
->multi(Redis::PIPELINE)
->lPush($key, $value)
// trim to $max_count, unless it's 0
->lTrim($key, 0, $max_count != 0 ? $max_count : -1)
->exec();
} else {
$keys = self::getKeyList($key, $max_count, $beta);
$vkey = $key . ':' . count($keys);
self::set($vkey, $value);
$keys[] = $vkey;
self::set($key, $keys);
}
return $list;
}
public static function deleteList(string $key, int $count = 0)
public static function deleteList(string $key, string $pool = 'default'): bool
{
$keys = self::getKeyList($key, $max_count, $beta);
if (!F\every($keys, function ($k) { return self::delete($k); })) {
Log::warning("Some element of the list associated with {$key} was not deleted. There may be some memory leakage in the cache process");
if (isset(self::$redis[$pool])) {
return self::$redis[$pool]->del($key) == 1;
} else {
$keys = self::getKeyList($key, $max_count, $beta);
if (!F\every($keys, function ($k) use ($pool) { return self::delete($k, $pool); })) {
Log::warning("Some element of the list associated with {$key} was not deleted. There may be some memory leakage in the cache process");
}
return self::delete($key, $pool);
}
return self::delete($key);
}
private static function getKeyList(string $key, int $max_count, float $beta): array
private static function getKeyList(string $key, int $max_count, string $pool, float $beta): RingBuffer
{
// Get the current keys associated with a list. If the cache
// is not primed, the function is called and returns an empty
@ -121,6 +180,6 @@ abstract class Cache
return self::get($key,
function (ItemInterface $i) use ($max_count) {
return new RingBuffer($max_count);
}, $beta);
}, $pool, $beta);
}
}