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[CORE][Cache] Add fast path for redis cache interactions

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This commit is contained in:
Hugo Sales 2021-12-12 17:02:16 +00:00
parent 10ddbf692a
commit 3ba7e1804b
Signed by untrusted user: someonewithpc
GPG Key ID: 7D0C7EAFC9D835A0
1 changed files with 88 additions and 49 deletions
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115
src/Core/Cache.php
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@ -135,26 +135,85 @@ abstract class Cache
}
}
private static function redisMaybeRecompute(string $key, callable $recompute, callable $no_recompute, string $pool = 'default', float $beta = 1.0): mixed
{
$should_recompute = $beta === \INF || !self::$redis[$pool]->exists($key);
if (!$should_recompute) {
$er = Common::config('cache', 'early_recompute');
if (\is_float($er)) {
if ($should_recompute = (mt_rand() / mt_getrandmax() > $er)) {
Log::info('Item "{key}" elected for early recomputation', ['key' => $key]);
}
} elseif ($er === true) {
if ($should_recompute = ($idletime = self::$redis[$pool]->object('idletime', $key) ?? false) && ($expiry = self::$redis[$pool]->ttl($key) ?? false) && $expiry <= $idletime / 1000 * $beta * log(random_int(1, \PHP_INT_MAX) / \PHP_INT_MAX)) {
// @codeCoverageIgnoreStart
Log::info('Item "{key}" elected for early recomputation {delta}s before its expiration', [
'key' => $key,
'delta' => sprintf('%.1f', $expiry - microtime(true)),
]);
// @codeCoverageIgnoreEnd
}
} else {
$should_recompute = false;
}
}
if ($should_recompute) {
return $recompute();
} else {
return $no_recompute();
}
}
public static function set(string $key, mixed $value, string $pool = 'default')
{
if (isset(self::$redis[$pool])) {
return self::$redis[$pool]->set($key, $value);
} else {
// there's no set method, must be done this way
return self::$pools[$pool]->get($key, fn ($i) => $value, \INF);
}
}
public static function get(string $key, callable $calculate, string $pool = 'default', float $beta = 1.0)
{
if (isset(self::$redis[$pool])) {
return self::redisMaybeRecompute(
$key,
recompute: function () use ($key, $calculate, $pool) {
$save = true; // Pass by reference
$res = $calculate(null, $save);
if ($save) {
self::set($key, $res, $pool);
}
return $res;
},
no_recompute: fn () => self::$redis[$pool]->get($key),
pool: $pool,
beta: $beta,
);
} else {
return self::$pools[$pool]->get($key, $calculate, $beta);
}
}
public static function delete(string $key, string $pool = 'default'): bool
{
if (isset(self::$redis[$pool])) {
return self::$redis[$pool]->del($key);
} else {
return self::$pools[$pool]->delete($key);
}
}
public static function exists(string $key, string $pool = 'default'): bool
{
if (isset(self::$redis[$pool])) {
return self::$redis[$pool]->exists($key);
} else {
// there's no set method, must be done this way
return self::$pools[$pool]->hasItem($key);
}
}
/**
* Retrieve a list from the cache, with a different implementation
@ -165,26 +224,14 @@ abstract class Cache
public static function getList(string $key, callable $calculate, string $pool = 'default', ?int $max_count = null, ?int $left = null, ?int $right = null, float $beta = 1.0): array
{
if (isset(self::$redis[$pool])) {
if (!($recompute = $beta === \INF || !(self::$redis[$pool]->exists($key)))) {
if (\is_float($er = Common::config('cache', 'early_recompute'))) {
$recompute = (mt_rand() / mt_getrandmax() > $er);
Log::info('Item "{key}" elected for early recomputation', ['key' => $key]);
} else {
if ($recompute = ($idletime = self::$redis[$pool]->object('idletime', $key) ?? false) && ($expiry = self::$redis[$pool]->ttl($key) ?? false) && $expiry <= $idletime / 1000 * $beta * log(random_int(1, \PHP_INT_MAX) / \PHP_INT_MAX)) {
// @codeCoverageIgnoreStart
Log::info('Item "{key}" elected for early recomputation {delta}s before its expiration', [
'key' => $key,
'delta' => sprintf('%.1f', $expiry - microtime(true)),
]);
// @codeCoverageIgnoreEnd
}
}
}
if ($recompute) {
return self::redisMaybeRecompute(
$key,
recompute: function () use ($key, $calculate, $pool, $max_count, $left, $right, $beta) {
$save = true; // Pass by reference
$res = $calculate(null, $save);
if ($save) {
self::setList($key, $res, $pool, $max_count, $beta);
}
$offset = $left ?? 0;
if (\is_null($right) && \is_null($max_count)) {
$length = null;
@ -192,9 +239,11 @@ abstract class Cache
$length = ($right ?? $max_count) - $offset;
}
return \array_slice($res, $offset, $length);
}
}
return self::$redis[$pool]->lRange($key, $left ?? 0, ($right ?? $max_count ?? 0) - 1);
},
no_recompute: fn () => self::$redis[$pool]->lRange($key, $left ?? 0, ($right ?? $max_count ?? 0) - 1),
pool: $pool,
beta: $beta,
);
} else {
return self::get($key, function () use ($calculate, $max_count) {
$save = true;
@ -274,30 +323,20 @@ abstract class Cache
public static function getHashMap(string $map_key, callable $calculate, string $pool = 'default', float $beta = 1.0): array
{
if (isset(self::$redis[$pool])) {
if (!($recompute = $beta === \INF || !(self::$redis[$pool]->exists($map_key)))) {
if (\is_float($er = Common::config('cache', 'early_recompute'))) {
$recompute = (mt_rand() / mt_getrandmax() > $er);
Log::info('Item "{map_key}" elected for early recomputation', ['key' => $map_key]);
} else {
if ($recompute = ($idletime = self::$redis[$pool]->object('idletime', $map_key) ?? false) && ($expiry = self::$redis[$pool]->ttl($map_key) ?? false) && $expiry <= $idletime / 1000 * $beta * log(random_int(1, \PHP_INT_MAX) / \PHP_INT_MAX)) {
// @codeCoverageIgnoreStart
Log::info('Item "{key}" elected for early recomputation {delta}s before its expiration', [
'key' => $map_key,
'delta' => sprintf('%.1f', $expiry - microtime(true)),
]);
// @codeCoverageIgnoreEnd
}
}
}
if ($recompute) {
return self::redisMaybeRecompute(
$map_key,
recompute: function () use ($map_key, $calculate, $pool) {
$save = true; // Pass by reference
$res = $calculate(null, $save);
if ($save) {
self::setHashMap($map_key, $res, $pool);
}
return $res;
}
}
return self::$redis[$pool]->hGetAll($map_key);
},
no_recompute: fn () => self::$redis[$pool]->hGetAll($map_key),
pool: $pool,
beta: $beta,
);
} else {
throw new NotImplementedException();
}