NAME

Hook::Filter::RulePool - A pool of filter rules

SYNOPSIS

use Hook::Filter::RulePool qw(get_rule_pool);

my $pool = get_rule_pool();

# add a rule that is always true
$pool->add_rule("1");

# add a more complex rule
$pool->add_rule("arg(0) =~ /bob/ && from =~ /my_module/");

if ($pool->eval_rules) {
    # call is allowed
}

foreach my $rule ($pool->get_rules) {
    print "pool has rule [$rule]\n";
}

$pool->flush_rules;

DESCRIPTION

Hook::Filter::RulePool contains all the filtering rules that should be eval-ed each time a filtered subroutine is called.

Using Hook::Filter::RulePool, you can modify the filtering rules at runtime. You can flush all rules or inject new ones.

INTERFACE

my $pool = get_rule_pool();

Return the pool containing all known filtering rules. get_rule_pool is not exported by default so you have to import it explicitly:

use Hook::Filter::RulePool qw(get_rule_pool);

$pool->eval_rules()

Evaluate all the rules in the pool. If one evaluates to true, return true. If one of them dies/croaks/confesses, return true. If none evaluates to true, return false. If the pool contained no rules, return true.

$pool->add_rule($rule)

Add the rule $rule to the pool and return $pool. $rule must be an instance of Hook::Filter::Rule, or a string representing valid perl code that evaluates to either true or false.

$pool->flush_rules()

Remove all rules from the pool and return $pool. All filtered calls will then be allowed by default since the pool is empty.

$pool->get_rules()

Return a list of all the rules registered in the pool, as instances of Hook::Filter::Rule.

new()

Hook::Filter::RulePool implements the singleton pattern. Therefore, do not use new() to instantiate a rule pool, use get_rule_pool instead.

DIAGNOSTICS

$pool->add_rule() croaks if its argument is not an instance of Hook::Filter::Rule or a string.

new() always croaks. Use get_rule_pool instead.

SEE ALSO

See Hook::Filter, Hook::Filter::Rule.

VERSION

$Id: RulePool.pm,v 1.2 2007/05/22 15:43:02 erwan_lemonnier Exp $

AUTHOR

Erwan Lemonnier <erwan@cpan.org>

LICENSE

See Hook::Filter.