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# NAME

Redis::Transaction - utilities for handling transactions of Redis

# SYNOPSIS

   use Redis;
   use Redis::Transaction qw/multi_exec watch_multi_exec/;

   # atomically increment foo and bar. It will execute following commands typically.
   # > MULTI
   # > INCR foo
   # > INCR bar
   # > EXEC
   multi_exec Redis->new, 10, sub {
       my $redis = shift;
       $redis->incr('foo');
       $redis->incr('bar');
   };

   # atomically increment the value of a key by 1 (let's suppose Redis doesn't have INCR).
   # It will execute following commands typically.
   # > WATCH mykey
   # > GET mykey
   # > MULTI
   # > SET mykey, 1
   # > EXEC
   watch_multi_exec Redis->new, ['mykey'], 10, sub {
       my $redis = shift;
       return $redis->get('mykey');
   }, sub {
       my ($redis, $value) = @_;
       $redis->set('mykey', $value + 1);
   };

# DESCRIPTION

Redis::Transaction is utilities for handling transactions of Redis.

# FUNCTIONS

## `multi_exec($redis:Redis, $retry_count:Int, $code:Code)`

Queue commands and execute them atomically.

## `watch_multi_exec($redis:Redis, $watch_keys:ArrayRef, $retry_count:Int, $watch_code:Code, $exec_code:Code)`

Queue commands and execute them atomically.
`watch_multi_exec` will retry `$watch_code` and `$exec_code` if `$watch_keys` are changed by another client.

# SEE ALSO

- [Redis.pm](https://metacpan.org/pod/Redis)
- [Redis::Fast](https://metacpan.org/pod/Redis::Fast)
- [Description of Transactions](http://redis.io/topics/transactions)

# LICENSE

Copyright (C) Ichinose Shogo.

This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.

# AUTHOR

Ichinose Shogo <[email protected]>