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fixed issue #29: config now caches returned value

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Qpsmtpd::config now checks cache, hooks, qmail_config, default in this
order and returns the first match. In any case the returned value is
stored in the cache, so subsequent calls to Qpsmtpd::config return the
same value (unless the cache is cleared).
This commit is contained in:
Peter J. Holzer 2009-11-15 16:50:27 +01:00 committed by Ask Bjørn Hansen
parent 44c67fcbc7
commit 46171d0c66
1 changed files with 27 additions and 15 deletions
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42
lib/Qpsmtpd.pm
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@ -149,29 +149,41 @@ sub clear_config_cache {
sub config {
my ($self, $c, $type) = @_;
#my $timer = $SAMPLER->("config", undef, 1);
$self->log(LOGDEBUG, "in config($c)");
# first try the cache
# XXX - is this always the right thing to do? what if a config hook
# can return different values on subsequent calls?
if ($_config_cache->{$c}) {
$self->log(LOGDEBUG, "config($c) returning (@{$_config_cache->{$c}}) from cache");
return wantarray ? @{$_config_cache->{$c}} : $_config_cache->{$c}->[0];
}
$_config_cache->{$c} = [$defaults{$c}] if exists($defaults{$c});
#warn "SELF->config($c) ", ref $self;
# then run the hooks
my ($rc, @config) = $self->run_hooks_no_respond("config", $c);
@config = () unless $rc == OK;
$self->log(LOGDEBUG, "config($c): hook returned ($rc, @config) ");
if ($rc == OK) {
$self->log(LOGDEBUG, "setting _config_cache for $c to [@config] from hooks and returning it");
$_config_cache->{$c} = \@config;
return wantarray ? @{$_config_cache->{$c}} : $_config_cache->{$c}->[0];
}
if (wantarray) {
@config = $self->get_qmail_config($c, $type) unless @config;
@config = $defaults{$c} if (!@config and $defaults{$c});
return @config;
# and then get_qmail_config
@config = $self->get_qmail_config($c, $type);
if (@config) {
$self->log(LOGDEBUG, "setting _config_cache for $c to [@config] from get_qmail_config and returning it");
$_config_cache->{$c} = \@config;
return wantarray ? @{$_config_cache->{$c}} : $_config_cache->{$c}->[0];
}
else {
return $config[0] if defined($config[0]);
my $val = $self->get_qmail_config($c, $type);
return $val if defined($val);
return $defaults{$c};
# finally we use the default if there is any:
if (exists($defaults{$c})) {
$self->log(LOGDEBUG, "setting _config_cache for $c to @{[$defaults{$c}]} from defaults and returning it");
$_config_cache->{$c} = [$defaults{$c}];
return wantarray ? @{$_config_cache->{$c}} : $_config_cache->{$c}->[0];
}
return;
}
sub config_dir {