/ 
DBIx-Fast-0.21
/ DBIx::Fast::Cache::Redis

NAME

DBIx::Fast::Cache::Redis - Redis backend for DBIx::Fast's result cache

SYNOPSIS

use Redis::Fast;
use DBIx::Fast::Cache::Redis;

my $db = DBIx::Fast->new(
    dsn   => $dsn,
    cache => {
        default_ttl => 300,
        backend     => DBIx::Fast::Cache::Redis->new(
            redis  => Redis::Fast->new(server => '127.0.0.1:6379'),
            prefix => 'myapp:dbcache:',
        ),
    },
);

my $promos = $db->cached(tag => 'promos')->all('SELECT * FROM promos');
$db->invalidate('promos');    # seen by every process using this Redis

DESCRIPTION

Stores DBIx::Fast::Cache entries in Redis, so every process (preforked web workers, job workers, scripts) shares one cache and one set of tags: an invalidate anywhere makes the tagged entries miss everywhere. The cache runs in shared mode with this backend: each tag has a version counter in Redis (INCR), entries record the versions they were stored under, and a read checks them (one extra GET per tag of the entry).

Values are serialized as JSON (Cpanel::JSON::XS, JSON::PP as a fallback), so cached results must be plain data - which query results are. Entries get the cache's TTL as a Redis expiry (SET ... EX).

METHODS

new

DBIx::Fast::Cache::Redis->new(redis => $client, prefix => 'dbixfast:');

redis is an already connected Redis::Fast or Redis object; prefix namespaces every key (default dbixfast:).

get, set, remove, incr

The backend interface used by DBIx::Fast::Cache.

clear

Deletes every key under the prefix, with SCAN (never KEYS).

supports_ttl

True: the cache passes its TTL to set.

redis, prefix

Readers for the constructor arguments.

SEE ALSO

DBIx::Fast::Cache, "cached" in DBIx::Fast, Redis::Fast

AUTHOR

SeHarrys

LICENSE

This is free software under the Artistic License 2.0.