| 1 | =head1 NAME |
1 | =head1 NAME |
| 2 | |
2 | |
| 3 | dc::DB - async. database and filesystem access for cfplus |
3 | DC::DB - async. database and filesystem access for deliantra |
| 4 | |
4 | |
| 5 | =head1 SYNOPSIS |
5 | =head1 SYNOPSIS |
| 6 | |
6 | |
| 7 | use dc::DB; |
7 | use DC::DB; |
| 8 | |
8 | |
| 9 | =head1 DESCRIPTION |
9 | =head1 DESCRIPTION |
| 10 | |
10 | |
| 11 | =over 4 |
11 | =over 4 |
| 12 | |
12 | |
| 13 | =cut |
13 | =cut |
| 14 | |
14 | |
| 15 | package dc::DB; |
15 | package DC::DB; |
| 16 | |
16 | |
| 17 | use strict; |
17 | use strict; |
| 18 | use utf8; |
18 | use utf8; |
| 19 | |
19 | |
|
|
20 | use File::Path (); |
| 20 | use Carp (); |
21 | use Carp (); |
| 21 | use Storable (); |
22 | use Storable (); |
| 22 | use Config; |
23 | use Config; |
| 23 | use BDB; |
24 | use BDB; |
| 24 | |
25 | |
| 25 | use dc; |
26 | use DC; |
| 26 | |
27 | |
| 27 | our $DBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}"; |
28 | our $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}"; |
|
|
29 | our $DBDIR = "client-" . BDB::VERSION . "-$Config{archname}"; |
| 28 | our $DB_HOME = "$Deliantra::VARDIR/$DBDIR"; |
30 | our $DB_HOME = "$Deliantra::VARDIR/$DBDIR"; |
| 29 | |
31 | |
| 30 | if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$DBDIR") { |
32 | unless (-d $DB_HOME) { |
|
|
33 | if (-d "$Deliantra::VARDIR/$ODBDIR") { |
|
|
34 | rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME; |
|
|
35 | print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n"; |
|
|
36 | } elsif (-d "$Deliantra::OLDDIR/$ODBDIR") { |
| 31 | rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME; |
37 | rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME; |
| 32 | print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$DBDIR to $DB_HOME\n"; |
38 | print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n"; |
|
|
39 | } else { |
|
|
40 | File::Path::mkpath [$DB_HOME] |
|
|
41 | or die "unable to create database directory $DB_HOME: $!"; |
|
|
42 | } |
| 33 | } |
43 | } |
|
|
44 | |
|
|
45 | BDB::max_poll_time 0.03; |
|
|
46 | BDB::max_parallel 1; |
| 34 | |
47 | |
| 35 | our $DB_ENV; |
48 | our $DB_ENV; |
| 36 | our $DB_STATE; |
49 | our $DB_STATE; |
| 37 | our %DB_TABLE; |
50 | our %DB_TABLE; |
|
|
51 | our $TILE_SEQ; |
| 38 | |
52 | |
| 39 | sub open_db { |
53 | sub try_open_db { |
| 40 | mkdir $DB_HOME, 0777; |
54 | File::Path::mkpath [$DB_HOME]; |
| 41 | |
55 | |
| 42 | $DB_ENV = db_env_create; |
56 | $DB_ENV = db_env_create; |
| 43 | |
57 | |
| 44 | $DB_ENV->set_errfile (\*STDERR); |
58 | $DB_ENV->set_errfile (\*STDERR); |
| 45 | $DB_ENV->set_msgfile (\*STDERR); |
59 | $DB_ENV->set_msgfile (\*STDERR); |
| … | |
… | |
| 75 | } |
89 | } |
| 76 | } |
90 | } |
| 77 | |
91 | |
| 78 | ############################################################################# |
92 | ############################################################################# |
| 79 | |
93 | |
| 80 | unless (eval { open_db }) { |
94 | our $WATCHER; |
| 81 | warn "$@";#d# |
95 | our $SYNC; |
| 82 | eval { File::Path::rmtree $DB_HOME }; |
|
|
| 83 | open_db; |
|
|
| 84 | } |
|
|
| 85 | |
|
|
| 86 | our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb; |
|
|
| 87 | |
|
|
| 88 | our $SYNC = EV::timer_ns 0, 60, sub { |
|
|
| 89 | $_[0]->stop; |
|
|
| 90 | db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { }; |
|
|
| 91 | }; |
|
|
| 92 | |
|
|
| 93 | our $tilemap; |
96 | our $facemap; |
| 94 | |
97 | |
| 95 | sub exists($$$) { |
98 | sub exists($$$) { |
| 96 | my ($db, $key, $cb) = @_; |
99 | my ($db, $key, $cb) = @_; |
| 97 | |
100 | |
| 98 | my $data; |
101 | my $data; |
| … | |
… | |
| 140 | my ($name, $cb) = @_; |
143 | my ($name, $cb) = @_; |
| 141 | |
144 | |
| 142 | my $table = table "facemap"; |
145 | my $table = table "facemap"; |
| 143 | my $id; |
146 | my $id; |
| 144 | |
147 | |
| 145 | db_get $table, undef, $name, $id, 0; |
148 | db_get $table, undef, $name => $id, 0; |
| 146 | return $cb->($id) unless $!; |
149 | $! or return $cb->($id); |
| 147 | |
150 | |
| 148 | for (1..100) { |
151 | unless ($TILE_SEQ) { |
| 149 | my $txn = $DB_ENV->txn_begin; |
152 | $TILE_SEQ = $table->sequence; |
| 150 | db_get $table, $txn, id => $id, 0; |
153 | $TILE_SEQ->initial_value (64); |
|
|
154 | $TILE_SEQ->set_cachesize (0); |
|
|
155 | db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE; |
|
|
156 | } |
| 151 | |
157 | |
| 152 | $id = 64 if $id < 64; |
158 | db_sequence_get $TILE_SEQ, undef, 1, my $id; |
| 153 | |
159 | |
| 154 | ++$id; |
160 | die "unable to allocate tile id: $!" |
| 155 | |
161 | if $!; |
| 156 | db_put $table, $txn, id => $id, 0; |
|
|
| 157 | db_txn_finish $txn; |
|
|
| 158 | |
|
|
| 159 | $SYNC->again unless $SYNC->is_active; |
|
|
| 160 | |
|
|
| 161 | return $cb->($id) unless $!; |
|
|
| 162 | |
|
|
| 163 | select undef, undef, undef, 0.01 * rand; |
|
|
| 164 | } |
162 | |
|
|
163 | db_put $table, undef, $name => $id, 0; |
|
|
164 | $cb->($id); |
| 165 | |
165 | |
| 166 | die "maximum number of transaction retries reached - database problems?"; |
|
|
| 167 | } |
166 | } |
| 168 | |
167 | |
| 169 | sub get_tile_id_sync($) { |
168 | sub get_tile_id_sync($) { |
| 170 | my ($name) = @_; |
169 | my ($name) = @_; |
| 171 | |
170 | |
| 172 | # fetch the full face table first |
|
|
| 173 | unless ($tilemap) { |
|
|
| 174 | do_table facemap => sub { |
|
|
| 175 | $tilemap = $_[0]; |
|
|
| 176 | delete $tilemap->{id}; |
|
|
| 177 | my %maptile = reverse %$tilemap;#d# |
|
|
| 178 | if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d# |
|
|
| 179 | $tilemap = { };#d# |
|
|
| 180 | dc::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d# |
|
|
| 181 | }#d# |
|
|
| 182 | }; |
|
|
| 183 | BDB::flush; |
|
|
| 184 | } |
|
|
| 185 | |
|
|
| 186 | $tilemap->{$name} ||= do { |
171 | $facemap->{$name} ||= do { |
| 187 | my $id; |
172 | my $id; |
| 188 | do_get_tile_id $name, sub { |
173 | do_get_tile_id $name, sub { |
| 189 | $id = $_[0]; |
174 | $id = $_[0]; |
| 190 | }; |
175 | }; |
| 191 | BDB::flush; |
176 | BDB::flush; |
| … | |
… | |
| 200 | "$DB_HOME/res-data-" . unpack "H*", $_[0] |
185 | "$DB_HOME/res-data-" . unpack "H*", $_[0] |
| 201 | } |
186 | } |
| 202 | |
187 | |
| 203 | sub sync { |
188 | sub sync { |
| 204 | # for debugging |
189 | # for debugging |
| 205 | #dc::DB::Server::req (sync => sub { }); |
190 | #DC::DB::Server::req (sync => sub { }); |
| 206 | dc::DB::Server::sync (); |
191 | DC::DB::Server::sync (); |
| 207 | } |
192 | } |
| 208 | |
193 | |
| 209 | sub unlink($$) { |
194 | sub unlink($$) { |
| 210 | dc::DB::Server::req (unlink => @_); |
195 | DC::DB::Server::req (unlink => @_); |
| 211 | } |
196 | } |
| 212 | |
197 | |
| 213 | sub read_file($$) { |
198 | sub read_file($$) { |
| 214 | dc::DB::Server::req (read_file => @_); |
199 | DC::DB::Server::req (read_file => @_); |
| 215 | } |
200 | } |
| 216 | |
201 | |
| 217 | sub write_file($$$) { |
202 | sub write_file($$$) { |
| 218 | dc::DB::Server::req (write_file => @_); |
203 | DC::DB::Server::req (write_file => @_); |
| 219 | } |
204 | } |
| 220 | |
205 | |
| 221 | sub prefetch_file($$$) { |
206 | sub prefetch_file($$$) { |
| 222 | dc::DB::Server::req (prefetch_file => @_); |
207 | DC::DB::Server::req (prefetch_file => @_); |
| 223 | } |
208 | } |
| 224 | |
209 | |
| 225 | sub logprint($$$) { |
210 | sub logprint($$$) { |
| 226 | dc::DB::Server::req (logprint => @_); |
211 | DC::DB::Server::req (logprint => @_); |
| 227 | } |
212 | } |
| 228 | |
213 | |
|
|
214 | ############################################################################# |
|
|
215 | |
| 229 | package dc::DB::Server; |
216 | package DC::DB::Server; |
| 230 | |
217 | |
| 231 | use strict; |
218 | use strict; |
| 232 | |
219 | |
| 233 | use EV (); |
220 | use EV (); |
| 234 | use Fcntl; |
221 | use Fcntl; |
| … | |
… | |
| 355 | |
342 | |
| 356 | print { $LOG_FH{$path} } "$ts $line\n" |
343 | print { $LOG_FH{$path} } "$ts $line\n" |
| 357 | } |
344 | } |
| 358 | |
345 | |
| 359 | sub run { |
346 | sub run { |
| 360 | ($FH, my $fh) = dc::socketpipe; |
347 | ($FH, my $fh) = DC::socketpipe; |
| 361 | |
348 | |
| 362 | my $oldfh = select $FH; $| = 1; select $oldfh; |
349 | my $oldfh = select $FH; $| = 1; select $oldfh; |
| 363 | my $oldfh = select $fh; $| = 1; select $oldfh; |
350 | my $oldfh = select $fh; $| = 1; select $oldfh; |
| 364 | |
351 | |
| 365 | my $pid = fork; |
352 | my $pid = fork; |
| 366 | |
353 | |
| 367 | if (defined $pid && !$pid) { |
354 | if (defined $pid && !$pid) { |
| 368 | local $SIG{QUIT}; |
355 | local $SIG{QUIT} = "IGNORE"; |
| 369 | local $SIG{__DIE__}; |
356 | local $SIG{__DIE__}; |
| 370 | local $SIG{__WARN__}; |
357 | local $SIG{__WARN__}; |
| 371 | eval { |
358 | eval { |
| 372 | close $FH; |
359 | close $FH; |
| 373 | |
360 | |
| … | |
… | |
| 379 | or die "unexpected eof while reading request"; |
366 | or die "unexpected eof while reading request"; |
| 380 | |
367 | |
| 381 | $req = Storable::thaw $req; |
368 | $req = Storable::thaw $req; |
| 382 | |
369 | |
| 383 | my ($id, $type, @args) = @$req; |
370 | my ($id, $type, @args) = @$req; |
| 384 | my $cb = dc::DB::Server->can ("do_$type") |
371 | my $cb = DC::DB::Server->can ("do_$type") |
| 385 | or die "$type: unknown database request type\n"; |
372 | or die "$type: unknown database request type\n"; |
| 386 | my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; |
373 | my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; |
| 387 | (syswrite $fh, $res) == length $res |
374 | (syswrite $fh, $res) == length $res |
| 388 | or die "DB::write: $!"; |
375 | or die "DB::write: $!"; |
| 389 | } |
376 | } |
| … | |
… | |
| 396 | }; |
383 | }; |
| 397 | |
384 | |
| 398 | warn $error |
385 | warn $error |
| 399 | if $error; |
386 | if $error; |
| 400 | |
387 | |
| 401 | dc::_exit 0; |
388 | DC::_exit 0; |
| 402 | } |
389 | } |
| 403 | |
390 | |
| 404 | close $fh; |
391 | close $fh; |
| 405 | dc::fh_nonblocking $FH, 1; |
392 | DC::fh_nonblocking $FH, 1; |
| 406 | |
393 | |
| 407 | $CB{die} = sub { die shift }; |
394 | $CB{die} = sub { die shift }; |
| 408 | |
395 | |
| 409 | $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; |
396 | $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; |
| 410 | $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; |
397 | $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; |
| … | |
… | |
| 412 | |
399 | |
| 413 | sub stop { |
400 | sub stop { |
| 414 | close $FH; |
401 | close $FH; |
| 415 | } |
402 | } |
| 416 | |
403 | |
|
|
404 | package DC::DB; |
|
|
405 | |
|
|
406 | sub nuke_db { |
|
|
407 | File::Path::mkpath [$DB_HOME]; |
|
|
408 | eval { File::Path::rmtree $DB_HOME }; |
|
|
409 | } |
|
|
410 | |
|
|
411 | sub open_db { |
|
|
412 | unless (eval { try_open_db }) { |
|
|
413 | warn "$@";#d# |
|
|
414 | eval { nuke_db }; |
|
|
415 | try_open_db; |
|
|
416 | } |
|
|
417 | |
|
|
418 | # fetch the full face table first |
|
|
419 | unless ($facemap) { |
|
|
420 | do_table facemap => sub { |
|
|
421 | $facemap = $_[0]; |
|
|
422 | delete $facemap->{id}; |
|
|
423 | my %maptile = reverse %$facemap;#d# |
|
|
424 | if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d# |
|
|
425 | $facemap = { };#d# |
|
|
426 | DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d# |
|
|
427 | }#d# |
|
|
428 | }; |
|
|
429 | } |
|
|
430 | |
|
|
431 | $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb; |
|
|
432 | $SYNC = EV::timer_ns 0, 60, sub { |
|
|
433 | $_[0]->stop; |
|
|
434 | db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { }; |
|
|
435 | }; |
|
|
436 | } |
|
|
437 | |
|
|
438 | END { |
|
|
439 | undef $TILE_SEQ; |
|
|
440 | %DB_TABLE = (); |
|
|
441 | undef $DB_ENV; |
|
|
442 | } |
|
|
443 | |
| 417 | 1; |
444 | 1; |
| 418 | |
445 | |
| 419 | =back |
446 | =back |
| 420 | |
447 | |
| 421 | =head1 AUTHOR |
448 | =head1 AUTHOR |
