1 |
=head1 NAME |
2 |
|
3 |
AnyEvent::DBI - asynchronous DBI access |
4 |
|
5 |
=head1 SYNOPSIS |
6 |
|
7 |
use AnyEvent::DBI; |
8 |
|
9 |
my $cv = AnyEvent->condvar; |
10 |
|
11 |
my $dbh = new AnyEvent::DBI "DBI:SQLite:dbname=test.db", "", ""; |
12 |
|
13 |
$dbh->exec ("select * from test where num=?", 10, sub { |
14 |
my ($dbh, $rows, $rv) = @_; |
15 |
|
16 |
$#_ or die "failure: $@"; |
17 |
|
18 |
print "@$_\n" |
19 |
for @$rows; |
20 |
|
21 |
$cv->broadcast; |
22 |
}); |
23 |
|
24 |
# asynchronously do sth. else here |
25 |
|
26 |
$cv->wait; |
27 |
|
28 |
=head1 DESCRIPTION |
29 |
|
30 |
This module is an L<AnyEvent> user, you need to make sure that you use and |
31 |
run a supported event loop. |
32 |
|
33 |
This module implements asynchronous DBI access by forking or executing |
34 |
separate "DBI-Server" processes and sending them requests. |
35 |
|
36 |
It means that you can run DBI requests in parallel to other tasks. |
37 |
|
38 |
The overhead for very simple statements ("select 0") is somewhere |
39 |
around 100% to 120% (dual/single core CPU) compared to an explicit |
40 |
prepare_cached/execute/fetchrow_arrayref/finish combination. |
41 |
|
42 |
=head2 ERROR HANDLING |
43 |
|
44 |
This module defines a number of functions that accept a callback |
45 |
argument. All callbacks used by this module get their AnyEvent::DBI handle |
46 |
object passed as first argument. |
47 |
|
48 |
If the request was successful, then there will be more arguments, |
49 |
otherwise there will only be the C<$dbh> argument and C<$@> contains an |
50 |
error message. |
51 |
|
52 |
A convinient way to check whether an error occured is to check C<$#_> - |
53 |
if that is true, then the function was successful, otherwise there was an |
54 |
error. |
55 |
|
56 |
=cut |
57 |
|
58 |
package AnyEvent::DBI; |
59 |
|
60 |
use common::sense; |
61 |
|
62 |
use Carp; |
63 |
use Socket (); |
64 |
use Scalar::Util (); |
65 |
use Storable (); |
66 |
|
67 |
use DBI (); # only needed in child actually - do it before fork & !exec? |
68 |
|
69 |
use AnyEvent (); |
70 |
use AnyEvent::Util (); |
71 |
|
72 |
use Errno (); |
73 |
use Fcntl (); |
74 |
use POSIX (); |
75 |
|
76 |
our $VERSION = '2.2'; |
77 |
|
78 |
our $FD_MAX = eval { POSIX::sysconf (&POSIX::_SC_OPEN_MAX) - 1 } || 1023; |
79 |
|
80 |
# this is the forked server code, could/should be bundled as it's own file |
81 |
|
82 |
our $DBH; |
83 |
|
84 |
sub req_open { |
85 |
my (undef, $dbi, $user, $pass, %attr) = @{+shift}; |
86 |
|
87 |
$DBH = DBI->connect ($dbi, $user, $pass, \%attr) or die $DBI::errstr; |
88 |
|
89 |
[1, 1] |
90 |
} |
91 |
|
92 |
sub req_exec { |
93 |
my (undef, $st, @args) = @{+shift}; |
94 |
my $sth = $DBH->prepare_cached ($st, undef, 1) |
95 |
or die [$DBI::errstr]; |
96 |
|
97 |
my $rv = $sth->execute (@args) |
98 |
or die [$sth->errstr]; |
99 |
|
100 |
[1, $sth->{NUM_OF_FIELDS} ? $sth->fetchall_arrayref : undef, $rv] |
101 |
} |
102 |
|
103 |
sub req_attr { |
104 |
my (undef, $attr_name, @attr_val) = @{+shift}; |
105 |
|
106 |
$DBH->{$attr_name} = $attr_val[0] |
107 |
if @attr_val; |
108 |
|
109 |
[1, $DBH->{$attr_name}] |
110 |
} |
111 |
|
112 |
sub req_begin_work { |
113 |
[1, $DBH->begin_work or die [$DBI::errstr]] |
114 |
} |
115 |
|
116 |
sub req_commit { |
117 |
[1, $DBH->commit or die [$DBI::errstr]] |
118 |
} |
119 |
|
120 |
sub req_rollback { |
121 |
[1, $DBH->rollback or die [$DBI::errstr]] |
122 |
} |
123 |
|
124 |
sub req_func { |
125 |
my (undef, $arg_string, $function) = @{+shift}; |
126 |
my @args = eval $arg_string; |
127 |
|
128 |
die "error evaling \$dbh->func() arg_string: $@" |
129 |
if $@; |
130 |
|
131 |
my $rc = $DBH->func (@args, $function); |
132 |
return [1, $rc, $DBI::err, $DBI::errstr]; |
133 |
} |
134 |
|
135 |
sub serve_fh($$) { |
136 |
my ($fh, $version) = @_; |
137 |
|
138 |
if ($VERSION != $version) { |
139 |
syswrite $fh, |
140 |
pack "L/a*", |
141 |
Storable::freeze |
142 |
[undef, "AnyEvent::DBI version mismatch ($VERSION vs. $version)"]; |
143 |
return; |
144 |
} |
145 |
|
146 |
eval { |
147 |
my $rbuf; |
148 |
|
149 |
while () { |
150 |
sysread $fh, $rbuf, 16384, length $rbuf |
151 |
or last; |
152 |
|
153 |
while () { |
154 |
my $len = unpack "L", $rbuf; |
155 |
|
156 |
# full request available? |
157 |
last unless $len && $len + 4 <= length $rbuf; |
158 |
|
159 |
my $req = Storable::thaw substr $rbuf, 4; |
160 |
substr $rbuf, 0, $len + 4, ""; # remove length + request |
161 |
|
162 |
my $wbuf = eval { pack "L/a*", Storable::freeze $req->[0]($req) }; |
163 |
$wbuf = pack "L/a*", Storable::freeze [undef, ref $@ ? ("$@->[0]", $@->[1]) : ("$@", 1)] |
164 |
if $@; |
165 |
|
166 |
for (my $ofs = 0; $ofs < length $wbuf; ) { |
167 |
$ofs += (syswrite $fh, substr $wbuf, $ofs |
168 |
or die "unable to write results"); |
169 |
} |
170 |
} |
171 |
} |
172 |
}; |
173 |
} |
174 |
|
175 |
sub serve_fd($$) { |
176 |
open my $fh, ">>&=$_[0]" |
177 |
or die "Couldn't open server file descriptor: $!"; |
178 |
|
179 |
serve_fh $fh, $_[1]; |
180 |
} |
181 |
|
182 |
=head2 METHODS |
183 |
|
184 |
=over 4 |
185 |
|
186 |
=item $dbh = new AnyEvent::DBI $database, $user, $pass, [key => value]... |
187 |
|
188 |
Returns a database handle for the given database. Each database handle |
189 |
has an associated server process that executes statements in order. If |
190 |
you want to run more than one statement in parallel, you need to create |
191 |
additional database handles. |
192 |
|
193 |
The advantage of this approach is that transactions work as state is |
194 |
preserved. |
195 |
|
196 |
Example: |
197 |
|
198 |
$dbh = new AnyEvent::DBI |
199 |
"DBI:mysql:test;mysql_read_default_file=/root/.my.cnf", "", ""; |
200 |
|
201 |
Additional key-value pairs can be used to adjust behaviour: |
202 |
|
203 |
=over 4 |
204 |
|
205 |
=item on_error => $callback->($dbh, $filename, $line, $fatal) |
206 |
|
207 |
When an error occurs, then this callback will be invoked. On entry, C<$@> |
208 |
is set to the error message. C<$filename> and C<$line> is where the |
209 |
original request was submitted. |
210 |
|
211 |
If the fatal argument is true then the database connection is shut down |
212 |
and your database handle became invalid. In addition to invoking the |
213 |
C<on_error> callback, all of your queued request callbacks are called |
214 |
without only the C<$dbh> argument. |
215 |
|
216 |
If omitted, then C<die> will be called on any errors, fatal or not. |
217 |
|
218 |
=item on_connect => $callback->($dbh[, $success]) |
219 |
|
220 |
If you supply an C<on_connect> callback, then this callback will be |
221 |
invoked after the database connect attempt. If the connection succeeds, |
222 |
C<$success> is true, otherwise it is missing and C<$@> contains the |
223 |
C<$DBI::errstr>. |
224 |
|
225 |
Regardless of whether C<on_connect> is supplied, connect errors will result in |
226 |
C<on_error> being called. However, if no C<on_connect> callback is supplied, then |
227 |
connection errors are considered fatal. The client will C<die> and the C<on_error> |
228 |
callback will be called with C<$fatal> true. |
229 |
|
230 |
When on_connect is supplied, connect error are not fatal and AnyEvent::DBI |
231 |
will not C<die>. You still cannot, however, use the $dbh object you |
232 |
received from C<new> to make requests. |
233 |
|
234 |
=item exec_server => 1 |
235 |
|
236 |
If you supply an C<exec_server> argument, then the DBI server process will |
237 |
fork and exec another perl interpreter (using C<$^X>) with just the |
238 |
AnyEvent::DBI proxy running. This will provide the cleanest possible proxy |
239 |
for your database server. |
240 |
|
241 |
If you do not supply the C<exec_server> argument (or supply it with a |
242 |
false value) then the traditional method of starting the server by forking |
243 |
the current process is used. The forked interpreter will try to clean |
244 |
itself up by calling POSIX::close on all file descriptors except STDIN, |
245 |
STDOUT, and STDERR (and the socket it uses to communicate with the cilent, |
246 |
of course). |
247 |
|
248 |
=item timeout => seconds |
249 |
|
250 |
If you supply a timeout parameter (fractional values are supported), then |
251 |
a timer is started any time the DBI handle expects a response from the |
252 |
server. This includes connection setup as well as requests made to the |
253 |
backend. The timeout spans the duration from the moment the first data |
254 |
is written (or queued to be written) until all expected responses are |
255 |
returned, but is postponed for "timeout" seconds each time more data is |
256 |
returned from the server. If the timer ever goes off then a fatal error is |
257 |
generated. If you have an C<on_error> handler installed, then it will be |
258 |
called, otherwise your program will die(). |
259 |
|
260 |
When altering your databases with timeouts it is wise to use |
261 |
transactions. If you quit due to timeout while performing insert, update |
262 |
or schema-altering commands you can end up not knowing if the action was |
263 |
submitted to the database, complicating recovery. |
264 |
|
265 |
Timeout errors are always fatal. |
266 |
|
267 |
=back |
268 |
|
269 |
Any additional key-value pairs will be rolled into a hash reference |
270 |
and passed as the final argument to the C<< DBI->connect (...) >> |
271 |
call. For example, to supress errors on STDERR and send them instead to an |
272 |
AnyEvent::Handle you could do: |
273 |
|
274 |
$dbh = new AnyEvent::DBI |
275 |
"DBI:mysql:test;mysql_read_default_file=/root/.my.cnf", "", "", |
276 |
PrintError => 0, |
277 |
on_error => sub { |
278 |
$log_handle->push_write ("DBI Error: $@ at $_[1]:$_[2]\n"); |
279 |
}; |
280 |
|
281 |
=cut |
282 |
|
283 |
# stupid Storable autoloading, total loss-loss situation |
284 |
Storable::thaw Storable::freeze []; |
285 |
|
286 |
sub new { |
287 |
my ($class, $dbi, $user, $pass, %arg) = @_; |
288 |
|
289 |
my ($client, $server) = AnyEvent::Util::portable_socketpair |
290 |
or croak "unable to create AnyEvent::DBI communications pipe: $!"; |
291 |
|
292 |
my %dbi_args = %arg; |
293 |
delete @dbi_args{qw(on_connect on_error timeout exec_server)}; |
294 |
|
295 |
my $self = bless \%arg, $class; |
296 |
$self->{fh} = $client; |
297 |
|
298 |
AnyEvent::Util::fh_nonblocking $client, 1; |
299 |
|
300 |
my $rbuf; |
301 |
my @caller = (caller)[1,2]; # the "default" caller |
302 |
|
303 |
{ |
304 |
Scalar::Util::weaken (my $self = $self); |
305 |
|
306 |
$self->{rw} = AE::io $client, 0, sub { |
307 |
return unless $self; |
308 |
|
309 |
my $len = sysread $client, $rbuf, 65536, length $rbuf; |
310 |
|
311 |
if ($len > 0) { |
312 |
# we received data, so reset the timer |
313 |
$self->{last_activity} = AE::now; |
314 |
|
315 |
while () { |
316 |
my $len = unpack "L", $rbuf; |
317 |
|
318 |
# full response available? |
319 |
last unless $len && $len + 4 <= length $rbuf; |
320 |
|
321 |
my $res = Storable::thaw substr $rbuf, 4; |
322 |
substr $rbuf, 0, $len + 4, ""; # remove length + request |
323 |
|
324 |
last unless $self; |
325 |
my $req = shift @{ $self->{queue} }; |
326 |
|
327 |
if (defined $res->[0]) { |
328 |
$res->[0] = $self; |
329 |
$req->[0](@$res); |
330 |
} else { |
331 |
my $cb = shift @$req; |
332 |
local $@ = $res->[1]; |
333 |
$cb->($self); |
334 |
$self->_error ($res->[1], @$req, $res->[2]) # error, request record, is_fatal |
335 |
if $self; # cb() could have deleted it |
336 |
} |
337 |
|
338 |
# no more queued requests, so become idle |
339 |
if ($self && !@{ $self->{queue} }) { |
340 |
undef $self->{last_activity}; |
341 |
$self->{tw_cb}->(); |
342 |
} |
343 |
} |
344 |
|
345 |
} elsif (defined $len) { |
346 |
# todo, caller? |
347 |
$self->_error ("unexpected eof", @caller, 1); |
348 |
} elsif ($! != Errno::EAGAIN) { |
349 |
# todo, caller? |
350 |
$self->_error ("read error: $!", @caller, 1); |
351 |
} |
352 |
}; |
353 |
|
354 |
$self->{tw_cb} = sub { |
355 |
if ($self->{timeout} && $self->{last_activity}) { |
356 |
if (AE::now > $self->{last_activity} + $self->{timeout}) { |
357 |
# we did time out |
358 |
my $req = $self->{queue}[0]; |
359 |
$self->_error (timeout => $req->[1], $req->[2], 1); # timeouts are always fatal |
360 |
} else { |
361 |
# we need to re-set the timeout watcher |
362 |
$self->{tw} = AE::timer |
363 |
$self->{last_activity} + $self->{timeout} - AE::now, |
364 |
0, |
365 |
$self->{tw_cb}, |
366 |
; |
367 |
} |
368 |
} else { |
369 |
# no timeout check wanted, or idle |
370 |
undef $self->{tw}; |
371 |
} |
372 |
}; |
373 |
|
374 |
$self->{ww_cb} = sub { |
375 |
return unless $self; |
376 |
|
377 |
$self->{last_activity} = AE::now; |
378 |
|
379 |
my $len = syswrite $client, $self->{wbuf} |
380 |
or return delete $self->{ww}; |
381 |
|
382 |
substr $self->{wbuf}, 0, $len, ""; |
383 |
}; |
384 |
} |
385 |
|
386 |
my $pid = fork; |
387 |
|
388 |
if ($pid) { |
389 |
# parent |
390 |
close $server; |
391 |
} elsif (defined $pid) { |
392 |
# child |
393 |
my $serv_fno = fileno $server; |
394 |
|
395 |
if ($self->{exec_server}) { |
396 |
fcntl $server, &Fcntl::F_SETFD, 0; # don't close the server side |
397 |
exec {$^X} |
398 |
"$0 dbi slave", |
399 |
-e => "require shift; AnyEvent::DBI::serve_fd ($serv_fno, $VERSION)", |
400 |
$INC{"AnyEvent/DBI.pm"}; |
401 |
POSIX::_exit 124; |
402 |
} else { |
403 |
($_ != $serv_fno) && POSIX::close $_ |
404 |
for $^F+1..$FD_MAX; |
405 |
serve_fh $server, $VERSION; |
406 |
|
407 |
# no other way on the broken windows platform, even this leaks |
408 |
# memory and might fail. |
409 |
kill 9, $$ |
410 |
if AnyEvent::WIN32; |
411 |
|
412 |
# and this kills the parent process on windows |
413 |
POSIX::_exit 0; |
414 |
} |
415 |
} else { |
416 |
croak "fork: $!"; |
417 |
} |
418 |
|
419 |
$self->{child_pid} = $pid; |
420 |
|
421 |
$self->_req ( |
422 |
($self->{on_connect} ? $self->{on_connect} : sub { }), |
423 |
(caller)[1,2], |
424 |
req_open => $dbi, $user, $pass, %dbi_args |
425 |
); |
426 |
|
427 |
$self |
428 |
} |
429 |
|
430 |
sub _server_pid { |
431 |
shift->{child_pid} |
432 |
} |
433 |
|
434 |
sub kill_child { |
435 |
my $self = shift; |
436 |
|
437 |
if (my $pid = delete $self->{child_pid}) { |
438 |
# kill and reap process |
439 |
my $kid_watcher; $kid_watcher = AE::child $pid, sub { |
440 |
undef $kid_watcher; |
441 |
}; |
442 |
kill TERM => $pid; |
443 |
} |
444 |
|
445 |
close delete $self->{fh}; |
446 |
} |
447 |
|
448 |
sub DESTROY { |
449 |
shift->kill_child; |
450 |
} |
451 |
|
452 |
sub _error { |
453 |
my ($self, $error, $filename, $line, $fatal) = @_; |
454 |
|
455 |
if ($fatal) { |
456 |
delete $self->{tw}; |
457 |
delete $self->{rw}; |
458 |
delete $self->{ww}; |
459 |
delete $self->{fh}; |
460 |
|
461 |
# for fatal errors call all enqueued callbacks with error |
462 |
while (my $req = shift @{$self->{queue}}) { |
463 |
local $@ = $error; |
464 |
$req->[0]->($self); |
465 |
} |
466 |
$self->kill_child; |
467 |
} |
468 |
|
469 |
local $@ = $error; |
470 |
|
471 |
if ($self->{on_error}) { |
472 |
$self->{on_error}($self, $filename, $line, $fatal) |
473 |
} else { |
474 |
die "$error at $filename, line $line\n"; |
475 |
} |
476 |
} |
477 |
|
478 |
=item $dbh->on_error ($cb->($dbh, $filename, $line, $fatal)) |
479 |
|
480 |
Sets (or clears, with C<undef>) the C<on_error> handler. |
481 |
|
482 |
=cut |
483 |
|
484 |
sub on_error { |
485 |
$_[0]{on_error} = $_[1]; |
486 |
} |
487 |
|
488 |
=item $dbh->timeout ($seconds) |
489 |
|
490 |
Sets (or clears, with C<undef>) the database timeout. Useful to extend the |
491 |
timeout when you are about to make a really long query. |
492 |
|
493 |
=cut |
494 |
|
495 |
sub timeout { |
496 |
my ($self, $timeout) = @_; |
497 |
|
498 |
$self->{timeout} = $timeout; |
499 |
|
500 |
# reschedule timer if one was running |
501 |
$self->{tw_cb}->(); |
502 |
} |
503 |
|
504 |
sub _req { |
505 |
my ($self, $cb, $filename, $line) = splice @_, 0, 4, (); |
506 |
|
507 |
unless ($self->{fh}) { |
508 |
local $@ = my $err = 'no database connection'; |
509 |
$cb->($self); |
510 |
$self->_error ($err, $filename, $line, 1); |
511 |
return; |
512 |
} |
513 |
|
514 |
push @{ $self->{queue} }, [$cb, $filename, $line]; |
515 |
|
516 |
# re-start timeout if necessary |
517 |
if ($self->{timeout} && !$self->{tw}) { |
518 |
$self->{last_activity} = AE::now; |
519 |
$self->{tw_cb}->(); |
520 |
} |
521 |
|
522 |
$self->{wbuf} .= pack "L/a*", Storable::freeze \@_; |
523 |
|
524 |
unless ($self->{ww}) { |
525 |
my $len = syswrite $self->{fh}, $self->{wbuf}; |
526 |
substr $self->{wbuf}, 0, $len, ""; |
527 |
|
528 |
# still any left? then install a write watcher |
529 |
$self->{ww} = AE::io $self->{fh}, 1, $self->{ww_cb} |
530 |
if length $self->{wbuf}; |
531 |
} |
532 |
} |
533 |
|
534 |
=item $dbh->exec ("statement", @args, $cb->($dbh, \@rows, $rv)) |
535 |
|
536 |
Executes the given SQL statement with placeholders replaced by |
537 |
C<@args>. The statement will be prepared and cached on the server side, so |
538 |
using placeholders is extremely important. |
539 |
|
540 |
The callback will be called with a weakened AnyEvent::DBI object as the |
541 |
first argument and the result of C<fetchall_arrayref> as (or C<undef> |
542 |
if the statement wasn't a select statement) as the second argument. |
543 |
|
544 |
Third argument is the return value from the C<< DBI->execute >> method |
545 |
call. |
546 |
|
547 |
If an error occurs and the C<on_error> callback returns, then only C<$dbh> |
548 |
will be passed and C<$@> contains the error message. |
549 |
|
550 |
=item $dbh->attr ($attr_name[, $attr_value], $cb->($dbh, $new_value)) |
551 |
|
552 |
An accessor for the handle attributes, such as C<AutoCommit>, |
553 |
C<RaiseError>, C<PrintError> and so on. If you provide an C<$attr_value> |
554 |
(which might be C<undef>), then the given attribute will be set to that |
555 |
value. |
556 |
|
557 |
The callback will be passed the database handle and the attribute's value |
558 |
if successful. |
559 |
|
560 |
If an error occurs and the C<on_error> callback returns, then only C<$dbh> |
561 |
will be passed and C<$@> contains the error message. |
562 |
|
563 |
=item $dbh->begin_work ($cb->($dbh[, $rc])) |
564 |
|
565 |
=item $dbh->commit ($cb->($dbh[, $rc])) |
566 |
|
567 |
=item $dbh->rollback ($cb->($dbh[, $rc])) |
568 |
|
569 |
The begin_work, commit, and rollback methods expose the equivalent |
570 |
transaction control method of the DBI driver. On success, C<$rc> is true. |
571 |
|
572 |
If an error occurs and the C<on_error> callback returns, then only C<$dbh> |
573 |
will be passed and C<$@> contains the error message. |
574 |
|
575 |
=item $dbh->func ('string_which_yields_args_when_evaled', $func_name, $cb->($dbh, $rc, $dbi_err, $dbi_errstr)) |
576 |
|
577 |
This gives access to database driver private methods. Because they |
578 |
are not standard you cannot always depend on the value of C<$rc> or |
579 |
C<$dbi_err>. Check the documentation for your specific driver/function |
580 |
combination to see what it returns. |
581 |
|
582 |
Note that the first argument will be eval'ed to produce the argument list to |
583 |
the func() method. This must be done because the serialization protocol |
584 |
between the AnyEvent::DBI server process and your program does not support the |
585 |
passage of closures. |
586 |
|
587 |
Here's an example to extend the query language in SQLite so it supports an |
588 |
intstr() function: |
589 |
|
590 |
$cv = AnyEvent->condvar; |
591 |
$dbh->func ( |
592 |
q{ |
593 |
instr => 2, sub { |
594 |
my ($string, $search) = @_; |
595 |
return index $string, $search; |
596 |
}, |
597 |
}, |
598 |
create_function => sub { |
599 |
return $cv->send ($@) |
600 |
unless $#_; |
601 |
$cv->send (undef, @_[1,2,3]); |
602 |
} |
603 |
); |
604 |
|
605 |
my ($err,$rc,$errcode,$errstr) = $cv->recv; |
606 |
|
607 |
die $err if defined $err; |
608 |
die "EVAL failed: $errstr" |
609 |
if $errcode; |
610 |
|
611 |
# otherwise, we can ignore $rc and $errcode for this particular func |
612 |
|
613 |
=cut |
614 |
|
615 |
for my $cmd_name (qw(exec attr begin_work commit rollback func)) { |
616 |
eval 'sub ' . $cmd_name . '{ |
617 |
my $cb = pop; |
618 |
splice @_, 1, 0, $cb, (caller)[1,2], "req_' . $cmd_name . '"; |
619 |
&_req |
620 |
}'; |
621 |
} |
622 |
|
623 |
=back |
624 |
|
625 |
=head1 SEE ALSO |
626 |
|
627 |
L<AnyEvent>, L<DBI>, L<Coro::Mysql>. |
628 |
|
629 |
=head1 AUTHOR |
630 |
|
631 |
Marc Lehmann <schmorp@schmorp.de> |
632 |
http://home.schmorp.de/ |
633 |
|
634 |
Adam Rosenstein <adam@redcondor.com> |
635 |
http://www.redcondor.com/ |
636 |
|
637 |
=cut |
638 |
|
639 |
1; |
640 |
|