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# -----------------------------------------------------------------------------
# $Id: Writer.pm 11365 2008-05-10 14:58:28Z topia $
# -----------------------------------------------------------------------------
# copyright (C) 2004 Topia <topia@clovery.jp>. all rights reserved.
package Log::Writer;
use strict;
use warnings;
use RunLoop;
use Carp;
use File::Spec;
use DirHandle;
use Tiarra::SharedMixin qw(shared shared_writer);
use Tiarra::WrapMainLoop;
use Tiarra::Utils;
our $_shared_instance;
Tiarra::Utils->define_attr_getter(0, qw(mainloop));
Tiarra::Utils->define_proxy('mainloop', 0,
map { ["_mainloop_$_", "lazy_$_"] }
qw(install uninstall));
# todo:
# - accept uri(maybe: ssh, syslog, ...)
sub _new {
my $class = shift;
my ($this) = {
objects => {},
schemes => {},
protocols => {},
fallbacks => [],
};
bless $this, $class;
$this->{mainloop} = Tiarra::WrapMainLoop->new(
type => 'timer',
interval => 120,
closure => sub { $this->run; });
return $this;
}
sub _initialize {
my $this = shift;
$this->load_all_protocols;
}
sub find_object {
my ($this, $path, %options) = @_;
my $object = $this->{objects}->{$path};
if (defined($object)) {
# ファイルが存在したので返す。
return $object;
} else {
# ファイルは存在しないので、登録して返す。
return $this->_register_inner($path, %options);
}
}
sub register {
my ($this, $path, %options) = @_;
my $object = $this->find_object($path, %options);
if (defined $object) {
# ファイルを得られた。
# 参照回数を増やして返す。
$object->register;
return $object;
} else {
return undef;
}
}
sub unregister {
my ($this, $path) = @_;
my $object = $this->{objects}->{$path};
if (defined $object) {
return $object->unregister;
} else {
croak('object "' . $path . '" has not registered yet!');
}
}
sub _register_inner {
my ($this, $path, %options) = @_;
my $object;
my @classes;
if ($path =~ m|^([^:]+):|) {
if (defined $this->{schemes}->{$1}) {
push(@classes, @{$this->{schemes}->{$1}});
}
}
push(@classes, @{$this->{fallbacks}});
foreach my $class (@classes) {
$object = $class->new($this, $path, %options);
last if defined $object;
}
if (defined $object) {
$this->{objects}->{$path} = $object;
$this->_mainloop_install;
return $object;
} else {
return undef;
}
}
sub run {
my ($this, $destruct) = @_;
# do object
foreach my $key (keys %{$this->{objects}}) {
my $object = $this->{objects}->{$key};
$object->flush;
$object->destruct(1) if $destruct;
}
}
sub destruct {
shared_writer->run(1);
shared_writer->{mainloop} = undef;
}
sub object_release {
my ($this, $path) = @_;
delete $this->{objects}->{$path};
if (!(%{$this->{objects}})) {
$this->_mainloop_uninstall;
}
}
# protocol
sub load_all_protocols {
my $class_or_this = shift;
my $this = $class_or_this->_this;
my $pkg_dir = File::Spec->catdir(split(/::/, ref($this)));
foreach (@INC) {
my $dir = File::Spec->catdir($_, $pkg_dir);
my $dh = DirHandle->new($dir);
if (defined $dh) {
my $path;
foreach my $file ($dh->read) {
$path = File::Spec->catdir($dir, $file);
next if !-r $path || -d $path;
next if $file !~ /^(.+)\.pm$/;
$this->load_protocol(ref($this).'::'.$1);
}
}
}
}
sub load_protocol {
my ($class_or_this, $pkg) = @_;
my $this = $class_or_this->_this;
return 1 if $this->{protocols}->{$pkg};
eval 'use ' . $pkg;
if ($@) {
$this->notify_error("load protocol($pkg) failed: $@");
return undef;
}
eval 'use Module::Use ($pkg);';
if ($@) {
$this->notify_error("register protocol($pkg) to module manager failed: $@");
return undef;
}
foreach my $scheme ($pkg->supported_schemes) {
push(@{$this->{schemes}->{$scheme}}, $pkg);
}
if ($pkg->capability('fallback')) {
push(@{$this->{fallbacks}}, $pkg);
}
$this->{protocols}->{$pkg} = 1;
return 1;
}
sub unload_protocol {
my ($class_or_this, $pkg) = @_;
my $this = $class_or_this->_this;
return 0 if !$this->{protocols}->{$pkg};
if ($pkg->capability('fallback')) {
@{$this->{fallbacks}} = grep $_ ne $pkg, @{$this->{fallbacks}};
}
foreach my $scheme ($pkg->supported_schemes) {
@{$this->{schemes}->{$scheme}} = grep $_ ne $pkg,
@{$this->{schemes}->{$scheme}};
}
delete $this->{protocols}->{$pkg};
return 1;
}
# util
sub notify_warn {
my ($this, $str) = @_;
RunLoop->shared_loop->notify_warn($str);
}
sub notify_error {
my ($this, $str) = @_;
RunLoop->shared_loop->notify_error($str);
}
sub notify_msg {
my ($this, $str) = @_;
RunLoop->shared_loop->notify_msg($str);
}
1;
|
