ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/deliantra/Deliantra-Client/DC/DB.pm
(Generate patch)

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.22 by root, Tue Nov 13 02:47:30 2007 UTC vs.
Revision 1.33 by root, Tue Mar 25 21:11:51 2008 UTC

1=head1 NAME 1=head1 NAME
2 2
3CFPlus::DB - async. database and filesystem access for cfplus 3DC::DB - async. database and filesystem access for deliantra
4 4
5=head1 SYNOPSIS 5=head1 SYNOPSIS
6 6
7 use CFPlus::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
15package CFPlus::DB; 15package DC::DB;
16 16
17use strict; 17use strict;
18use utf8; 18use utf8;
19 19
20use Carp (); 20use Carp ();
21use Storable (); 21use Storable ();
22use Config; 22use Config;
23use BDB;
23 24
24use CFPlus; 25use DC;
25 26
26our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}"; 27our $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
28our $DBDIR = "client-" . BDB::VERSION . "-$Config{archname}";
29our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
30
31if (!-e $DB_HOME and -e "$Deliantra::VARDIR/$ODBDIR") {
32 rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
33 print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
34}
35
36if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$ODBDIR") {
37 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
38 print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
39}
40
41BDB::max_poll_time 0.03;
42BDB::max_parallel 1;
43
44our $DB_ENV;
45our $DB_STATE;
46our %DB_TABLE;
47
48sub try_open_db {
49 mkdir $DB_HOME, 0777;
50
51 $DB_ENV = db_env_create;
52
53 $DB_ENV->set_errfile (\*STDERR);
54 $DB_ENV->set_msgfile (\*STDERR);
55 $DB_ENV->set_verbose (-1, 1);
56
57 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC);
58 $DB_ENV->set_cachesize (0, 2048 * 1024, 0);
59
60 db_env_open $DB_ENV, $DB_HOME,
61 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
62 0666;
63
64 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
65
66 1
67}
68
69sub table($) {
70 $DB_TABLE{$_[0]} ||= do {
71 my ($table) = @_;
72
73 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
74
75 my $db = db_create $DB_ENV;
76 $db->set_flags (BDB::CHKSUM);
77
78 db_open $db, undef, $table, undef, BDB::BTREE,
79 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
80
81 $! and "unable to open/create database table $_[0]: ". BDB::strerror;
82
83 $db
84 }
85}
86
87#############################################################################
88
89our $WATCHER;
90our $SYNC;
91our $tilemap;
92
93sub exists($$$) {
94 my ($db, $key, $cb) = @_;
95
96 my $data;
97 db_get table $db, undef, $key, $data, 0, sub {
98 $cb->($! ? () : length $data);
99 };
100}
101
102sub get($$$) {
103 my ($db, $key, $cb) = @_;
104
105 my $data;
106 db_get table $db, undef, $key, $data, 0, sub {
107 $cb->($! ? () : $data);
108 };
109}
110
111sub put($$$$) {
112 my ($db, $key, $data, $cb) = @_;
113
114 db_put table $db, undef, $key, $data, 0, sub {
115 $cb->($!);
116 $SYNC->again unless $SYNC->is_active;
117 };
118}
119
120sub do_table {
121 my ($db, $cb) = @_;
122
123 $db = table $db;
124
125 my $cursor = $db->cursor;
126 my %kv;
127
128 for (;;) {
129 db_c_get $cursor, my $k, my $v, BDB::NEXT;
130 last if $!;
131 $kv{$k} = $v;
132 }
133
134 $cb->(\%kv);
135}
136
137sub do_get_tile_id {
138 my ($name, $cb) = @_;
139
140 my $table = table "facemap";
141 my $id;
142
143 db_get $table, undef, $name, $id, 0;
144 return $cb->($id) unless $!;
145
146 for (1..100) {
147 my $txn = $DB_ENV->txn_begin;
148 db_get $table, $txn, id => $id, 0;
149
150 $id = 64 if $id < 64;
151
152 ++$id;
153
154 db_put $table, $txn, id => $id, 0;
155 db_txn_finish $txn;
156
157 $SYNC->again unless $SYNC->is_active;
158
159 return $cb->($id) unless $!;
160
161 select undef, undef, undef, 0.01 * rand;
162 }
163
164 die "maximum number of transaction retries reached - database problems?";
165}
166
167sub get_tile_id_sync($) {
168 my ($name) = @_;
169
170 $tilemap->{$name} ||= do {
171 my $id;
172 do_get_tile_id $name, sub {
173 $id = $_[0];
174 };
175 BDB::flush;
176 $id
177 }
178}
179
180#############################################################################
27 181
28sub path_of_res($) { 182sub path_of_res($) {
29 utf8::downgrade $_[0]; # bug in unpack "H*" 183 utf8::downgrade $_[0]; # bug in unpack "H*"
30 "$DB_HOME/res-data-" . unpack "H*", $_[0] 184 "$DB_HOME/res-data-" . unpack "H*", $_[0]
31} 185}
32 186
33sub sync { 187sub sync {
34 # for debugging 188 # for debugging
35 #CFPlus::DB::Server::req (sync => sub { }); 189 #DC::DB::Server::req (sync => sub { });
36 CFPlus::DB::Server::sync (); 190 DC::DB::Server::sync ();
37}
38
39sub exists($$$) {
40 CFPlus::DB::Server::req (exists => @_);
41}
42
43sub get($$$) {
44 CFPlus::DB::Server::req (get => @_);
45}
46
47sub put($$$$) {
48 CFPlus::DB::Server::req (put => @_);
49} 191}
50 192
51sub unlink($$) { 193sub unlink($$) {
52 CFPlus::DB::Server::req (unlink => @_); 194 DC::DB::Server::req (unlink => @_);
53} 195}
54 196
55sub read_file($$) { 197sub read_file($$) {
56 CFPlus::DB::Server::req (read_file => @_); 198 DC::DB::Server::req (read_file => @_);
57} 199}
58 200
59sub write_file($$$) { 201sub write_file($$$) {
60 CFPlus::DB::Server::req (write_file => @_); 202 DC::DB::Server::req (write_file => @_);
61} 203}
62 204
63sub prefetch_file($$$) { 205sub prefetch_file($$$) {
64 CFPlus::DB::Server::req (prefetch_file => @_); 206 DC::DB::Server::req (prefetch_file => @_);
65} 207}
66 208
67sub logprint($$$) { 209sub logprint($$$) {
68 CFPlus::DB::Server::req (logprint => @_); 210 DC::DB::Server::req (logprint => @_);
69} 211}
70 212
71our $tilemap; 213#############################################################################
72 214
73sub get_tile_id_sync($) {
74 my ($name) = @_;
75
76 # fetch the full face table first
77 unless ($tilemap) {
78 CFPlus::DB::Server::req (table => facemap => sub {
79 $tilemap = $_[0];
80 delete $tilemap->{id};
81 my %maptile = reverse %$tilemap;#d#
82 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
83 $tilemap = { };#d#
84 CFPlus::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
85 }#d#
86 });
87 sync;
88 }
89
90 $tilemap->{$name} ||= do {
91 my $id;
92 CFPlus::DB::Server::req (get_tile_id => $name, sub { $id = $_[0] });
93 sync;
94 $id
95 }
96}
97
98package CFPlus::DB::Server; 215package DC::DB::Server;
99 216
100use strict; 217use strict;
101 218
219use EV ();
102use Fcntl; 220use Fcntl;
103use BerkeleyDB;
104
105our $DB_ENV;
106our $DB_STATE;
107our %DB_TABLE;
108
109sub open_db {
110 mkdir $DB_HOME, 0777;
111 my $recover = $BerkeleyDB::db_version >= 4.4
112 ? eval "DB_REGISTER | DB_RECOVER"
113 : 0;
114
115 $DB_ENV = new BerkeleyDB::Env
116 -Home => $DB_HOME,
117 -Cachesize => 8_000_000,
118 -ErrFile => "$DB_HOME/errorlog.txt",
119# -ErrPrefix => "DATABASE",
120 -Verbose => 1,
121 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
122 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE | DB_TXN_WRITE_NOSYNC,
123 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
124
125 1
126}
127
128sub table($) {
129 $DB_TABLE{$_[0]} ||= do {
130 my ($table) = @_;
131
132 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
133
134 new BerkeleyDB::Btree
135 -Env => $DB_ENV,
136 -Filename => $table,
137# -Filename => "database",
138# -Subname => $table,
139 -Property => DB_CHKSUM,
140 -Flags => DB_AUTO_COMMIT | DB_CREATE | DB_UPGRADE,
141 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
142 }
143}
144 221
145our %CB; 222our %CB;
146our $FH; 223our $FH;
147our $ID = "aaa0"; 224our $ID = "aaa0";
148our ($fh_r_watcher, $fh_w_watcher); 225our ($fh_r_watcher, $fh_w_watcher);
149our $sync_timer; 226our $sync_timer;
150our $write_buf; 227our $write_buf;
151our $read_buf; 228our $read_buf;
152 229
153our $SYNC = EV::timer_ns 0, 60, sub {
154 $_[0]->stop;
155 CFPlus::DB::Server::req (sync => sub { });
156};
157
158sub fh_write { 230sub fh_write {
159 my $len = syswrite $FH, $write_buf; 231 my $len = syswrite $FH, $write_buf;
160 232
161 substr $write_buf, 0, $len, ""; 233 substr $write_buf, 0, $len, "";
162 234
… …
205 my $id = ++$ID; 277 my $id = ++$ID;
206 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 278 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
207 $CB{$id} = $cb; 279 $CB{$id} = $cb;
208 280
209 $fh_w_watcher->start; 281 $fh_w_watcher->start;
210 $SYNC->again unless $SYNC->is_active;
211}
212
213sub do_sync {
214 $DB_ENV->txn_checkpoint (0, 0, 0);
215 ()
216}
217
218sub do_exists {
219 my ($db, $key) = @_;
220
221 utf8::downgrade $key;
222 my $data;
223 (table $db)->db_get ($key, $data) == 0
224 ? length $data
225 : ()
226}
227
228sub do_get {
229 my ($db, $key) = @_;
230
231 utf8::downgrade $key;
232 my $data;
233 (table $db)->db_get ($key, $data) == 0
234 ? $data
235 : ()
236}
237
238sub do_put {
239 my ($db, $key, $data) = @_;
240
241 utf8::downgrade $key;
242 utf8::downgrade $data;
243 (table $db)->db_put ($key => $data)
244}
245
246sub do_table {
247 my ($db) = @_;
248
249 $db = table $db;
250
251 my $cursor = $db->db_cursor;
252 my %kv;
253 my ($k, $v);
254 $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
255
256 \%kv
257}
258
259sub do_get_tile_id {
260 my ($name) = @_;
261
262 my $id;
263 my $table = table "facemap";
264
265 return $id
266 if $table->db_get ($name, $id) == 0;
267
268 for (1..100) {
269 my $txn = $DB_ENV->txn_begin;
270 my $status = $table->db_get (id => $id);
271 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
272 $id = ($id || 64) + 1;
273 if ($table->db_put (id => $id) == 0
274 && $table->db_put ($name => $id) == 0) {
275 $txn->txn_commit;
276
277 return $id;
278 }
279 }
280 $txn->txn_abort;
281 select undef, undef, undef, 0.01 * rand;
282 }
283
284 die "maximum number of transaction retries reached - database problems?";
285} 282}
286 283
287sub do_unlink { 284sub do_unlink {
288 unlink $_[0]; 285 unlink $_[0];
289} 286}
… …
344 341
345 print { $LOG_FH{$path} } "$ts $line\n" 342 print { $LOG_FH{$path} } "$ts $line\n"
346} 343}
347 344
348sub run { 345sub run {
349 ($FH, my $fh) = CFPlus::socketpipe; 346 ($FH, my $fh) = DC::socketpipe;
350 347
351 my $oldfh = select $FH; $| = 1; select $oldfh; 348 my $oldfh = select $FH; $| = 1; select $oldfh;
352 my $oldfh = select $fh; $| = 1; select $oldfh; 349 my $oldfh = select $fh; $| = 1; select $oldfh;
353 350
354 my $pid = fork; 351 my $pid = fork;
355 352
356 if (defined $pid && !$pid) { 353 if (defined $pid && !$pid) {
357 local $SIG{QUIT}; 354 local $SIG{QUIT} = "IGNORE";
358 local $SIG{__DIE__}; 355 local $SIG{__DIE__};
359 local $SIG{__WARN__}; 356 local $SIG{__WARN__};
360 eval { 357 eval {
361 close $FH; 358 close $FH;
362
363 unless (eval { open_db }) {
364 eval { File::Path::rmtree $DB_HOME };
365 open_db;
366 }
367 359
368 while () { 360 while () {
369 4 == read $fh, my $len, 4 361 4 == read $fh, my $len, 4
370 or last; 362 or last;
371 $len = unpack "N", $len; 363 $len = unpack "N", $len;
… …
373 or die "unexpected eof while reading request"; 365 or die "unexpected eof while reading request";
374 366
375 $req = Storable::thaw $req; 367 $req = Storable::thaw $req;
376 368
377 my ($id, $type, @args) = @$req; 369 my ($id, $type, @args) = @$req;
378 my $cb = CFPlus::DB::Server->can ("do_$type") 370 my $cb = DC::DB::Server->can ("do_$type")
379 or die "$type: unknown database request type\n"; 371 or die "$type: unknown database request type\n";
380 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 372 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
381 (syswrite $fh, $res) == length $res 373 (syswrite $fh, $res) == length $res
382 or die "DB::write: $!"; 374 or die "DB::write: $!";
383 } 375 }
384 }; 376 };
385 377
386 my $error = $@; 378 my $error = $@;
387 379
388 eval { 380 eval {
389 $DB_ENV->txn_checkpoint (0, 0, 0);
390
391 undef %DB_TABLE;
392 undef $DB_ENV;
393
394 Storable::store_fd [die => $error], $fh; 381 Storable::store_fd [die => $error], $fh;
395 }; 382 };
396 383
384 warn $error
385 if $error;
386
397 CFPlus::_exit 0; 387 DC::_exit 0;
398 } 388 }
399 389
400 close $fh; 390 close $fh;
401 CFPlus::fh_nonblocking $FH, 1; 391 DC::fh_nonblocking $FH, 1;
402 392
403 $CB{die} = sub { die shift }; 393 $CB{die} = sub { die shift };
404 394
405 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; 395 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
406 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; 396 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
407 $SYNC->again unless $SYNC->is_active;
408} 397}
409 398
410sub stop { 399sub stop {
411 close $FH; 400 close $FH;
412} 401}
413 402
403package DC::DB;
404
405sub open_db {
406 unless (eval { try_open_db }) {
407 warn "$@";#d#
408 eval { File::Path::rmtree $DB_HOME };
409 try_open_db;
410 }
411
412 # fetch the full face table first
413 unless ($tilemap) {
414 do_table facemap => sub {
415 $tilemap = $_[0];
416 delete $tilemap->{id};
417 my %maptile = reverse %$tilemap;#d#
418 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
419 $tilemap = { };#d#
420 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
421 }#d#
422 };
423 }
424
425 $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
426 $SYNC = EV::timer_ns 0, 60, sub {
427 $_[0]->stop;
428 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
429 };
430}
431
432END {
433 %DB_TABLE = ();
434 undef $DB_ENV;
435}
436
4141; 4371;
415 438
416=back 439=back
417 440
418=head1 AUTHOR 441=head1 AUTHOR

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines