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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.21 by root, Mon Nov 12 23:25:37 2007 UTC vs.
Revision 1.31 by root, Thu Jan 10 23:02:19 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;
42
43our $DB_ENV;
44our $DB_STATE;
45our %DB_TABLE;
46
47sub open_db {
48 mkdir $DB_HOME, 0777;
49
50 $DB_ENV = db_env_create;
51
52 $DB_ENV->set_errfile (\*STDERR);
53 $DB_ENV->set_msgfile (\*STDERR);
54 $DB_ENV->set_verbose (-1, 1);
55
56 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC);
57 $DB_ENV->set_cachesize (0, 2048 * 1024, 0);
58
59 db_env_open $DB_ENV, $DB_HOME,
60 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
61 0666;
62
63 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
64
65 1
66}
67
68sub table($) {
69 $DB_TABLE{$_[0]} ||= do {
70 my ($table) = @_;
71
72 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
73
74 my $db = db_create $DB_ENV;
75 $db->set_flags (BDB::CHKSUM);
76
77 db_open $db, undef, $table, undef, BDB::BTREE,
78 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
79
80 $! and "unable to open/create database table $_[0]: ". BDB::strerror;
81
82 $db
83 }
84}
85
86#############################################################################
87
88unless (eval { open_db }) {
89 warn "$@";#d#
90 eval { File::Path::rmtree $DB_HOME };
91 open_db;
92}
93
94our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
95
96our $SYNC = EV::timer_ns 0, 60, sub {
97 $_[0]->stop;
98 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
99};
100
101our $tilemap;
102
103sub exists($$$) {
104 my ($db, $key, $cb) = @_;
105
106 my $data;
107 db_get table $db, undef, $key, $data, 0, sub {
108 $cb->($! ? () : length $data);
109 };
110}
111
112sub get($$$) {
113 my ($db, $key, $cb) = @_;
114
115 my $data;
116 db_get table $db, undef, $key, $data, 0, sub {
117 $cb->($! ? () : $data);
118 };
119}
120
121sub put($$$$) {
122 my ($db, $key, $data, $cb) = @_;
123
124 db_put table $db, undef, $key, $data, 0, sub {
125 $cb->($!);
126 $SYNC->again unless $SYNC->is_active;
127 };
128}
129
130sub do_table {
131 my ($db, $cb) = @_;
132
133 $db = table $db;
134
135 my $cursor = $db->cursor;
136 my %kv;
137
138 for (;;) {
139 db_c_get $cursor, my $k, my $v, BDB::NEXT;
140 last if $!;
141 $kv{$k} = $v;
142 }
143
144 $cb->(\%kv);
145}
146
147sub do_get_tile_id {
148 my ($name, $cb) = @_;
149
150 my $table = table "facemap";
151 my $id;
152
153 db_get $table, undef, $name, $id, 0;
154 return $cb->($id) unless $!;
155
156 for (1..100) {
157 my $txn = $DB_ENV->txn_begin;
158 db_get $table, $txn, id => $id, 0;
159
160 $id = 64 if $id < 64;
161
162 ++$id;
163
164 db_put $table, $txn, id => $id, 0;
165 db_txn_finish $txn;
166
167 $SYNC->again unless $SYNC->is_active;
168
169 return $cb->($id) unless $!;
170
171 select undef, undef, undef, 0.01 * rand;
172 }
173
174 die "maximum number of transaction retries reached - database problems?";
175}
176
177sub get_tile_id_sync($) {
178 my ($name) = @_;
179
180 $tilemap->{$name} ||= do {
181 my $id;
182 do_get_tile_id $name, sub {
183 $id = $_[0];
184 };
185 BDB::flush;
186 $id
187 }
188}
189
190#############################################################################
27 191
28sub path_of_res($) { 192sub path_of_res($) {
29 utf8::downgrade $_[0]; # bug in unpack "H*" 193 utf8::downgrade $_[0]; # bug in unpack "H*"
30 "$DB_HOME/res-data-" . unpack "H*", $_[0] 194 "$DB_HOME/res-data-" . unpack "H*", $_[0]
31} 195}
32 196
33sub sync { 197sub sync {
34 # for debugging 198 # for debugging
35 #CFPlus::DB::Server::req (sync => sub { }); 199 #DC::DB::Server::req (sync => sub { });
36 CFPlus::DB::Server::sync (); 200 DC::DB::Server::sync ();
37}
38
39sub exists($$$) {
40 CFPlus::DB::Server::req (exists => @_);
41}
42
43sub get($$$) {
44 CFPlus::DB::Server::req (get => @_);
45}
46
47sub put($$$$) {
48 CFPlus::DB::Server::req (put => @_);
49} 201}
50 202
51sub unlink($$) { 203sub unlink($$) {
52 CFPlus::DB::Server::req (unlink => @_); 204 DC::DB::Server::req (unlink => @_);
53} 205}
54 206
55sub read_file($$) { 207sub read_file($$) {
56 CFPlus::DB::Server::req (read_file => @_); 208 DC::DB::Server::req (read_file => @_);
57} 209}
58 210
59sub write_file($$$) { 211sub write_file($$$) {
60 CFPlus::DB::Server::req (write_file => @_); 212 DC::DB::Server::req (write_file => @_);
61} 213}
62 214
63sub prefetch_file($$$) { 215sub prefetch_file($$$) {
64 CFPlus::DB::Server::req (prefetch_file => @_); 216 DC::DB::Server::req (prefetch_file => @_);
65} 217}
66 218
67sub logprint($$$) { 219sub logprint($$$) {
68 CFPlus::DB::Server::req (logprint => @_); 220 DC::DB::Server::req (logprint => @_);
69} 221}
70 222
71our $tilemap; 223#############################################################################
72 224
73sub get_tile_id_sync($) {
74 my ($name) = @_;
75
76 # fetch the full face table first 225# fetch the full face table first
77 unless ($tilemap) { 226unless ($tilemap) {
78 CFPlus::DB::Server::req (table => facemap => sub { 227 do_table facemap => sub {
79 $tilemap = $_[0]; 228 $tilemap = $_[0];
80 delete $tilemap->{id}; 229 delete $tilemap->{id};
81 my %maptile = reverse %$tilemap;#d# 230 my %maptile = reverse %$tilemap;#d#
82 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d# 231 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
83 $tilemap = { };#d# 232 $tilemap = { };#d#
84 CFPlus::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d# 233 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
85 }#d# 234 }#d#
86 });
87 sync;
88 } 235 };
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} 236}
97 237
98package CFPlus::DB::Server; 238package DC::DB::Server;
99 239
100use strict; 240use strict;
101 241
242use EV ();
102use Fcntl; 243use 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}
144 244
145our %CB; 245our %CB;
146our $FH; 246our $FH;
147our $ID = "aaa0"; 247our $ID = "aaa0";
148our ($fh_r_watcher, $fh_w_watcher); 248our ($fh_r_watcher, $fh_w_watcher);
149our $sync_timer; 249our $sync_timer;
150our $write_buf; 250our $write_buf;
151our $read_buf; 251our $read_buf;
152 252
153our $SYNC = EV::timer_ns 0, 60, sub {
154 $_[0]->stop;
155 CFPlus::DB::Server::req (sync => sub { });
156};
157
158sub fh_write { 253sub fh_write {
159 my $len = syswrite $FH, $write_buf; 254 my $len = syswrite $FH, $write_buf;
160 255
161 substr $write_buf, 0, $len, ""; 256 substr $write_buf, 0, $len, "";
162 257
… …
205 my $id = ++$ID; 300 my $id = ++$ID;
206 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 301 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
207 $CB{$id} = $cb; 302 $CB{$id} = $cb;
208 303
209 $fh_w_watcher->start; 304 $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} 305}
286 306
287sub do_unlink { 307sub do_unlink {
288 unlink $_[0]; 308 unlink $_[0];
289} 309}
… …
344 364
345 print { $LOG_FH{$path} } "$ts $line\n" 365 print { $LOG_FH{$path} } "$ts $line\n"
346} 366}
347 367
348sub run { 368sub run {
349 ($FH, my $fh) = CFPlus::socketpipe; 369 ($FH, my $fh) = DC::socketpipe;
350 370
351 my $oldfh = select $FH; $| = 1; select $oldfh; 371 my $oldfh = select $FH; $| = 1; select $oldfh;
352 my $oldfh = select $fh; $| = 1; select $oldfh; 372 my $oldfh = select $fh; $| = 1; select $oldfh;
353 373
354 my $pid = fork; 374 my $pid = fork;
355 375
356 if (defined $pid && !$pid) { 376 if (defined $pid && !$pid) {
357 local $SIG{QUIT}; 377 local $SIG{QUIT} = "IGNORE";
358 local $SIG{__DIE__}; 378 local $SIG{__DIE__};
359 local $SIG{__WARN__}; 379 local $SIG{__WARN__};
360 eval { 380 eval {
361 close $FH; 381 close $FH;
362
363 unless (eval { open_db }) {
364 eval { File::Path::rmtree $DB_HOME };
365 open_db;
366 }
367 382
368 while () { 383 while () {
369 4 == read $fh, my $len, 4 384 4 == read $fh, my $len, 4
370 or last; 385 or last;
371 $len = unpack "N", $len; 386 $len = unpack "N", $len;
… …
373 or die "unexpected eof while reading request"; 388 or die "unexpected eof while reading request";
374 389
375 $req = Storable::thaw $req; 390 $req = Storable::thaw $req;
376 391
377 my ($id, $type, @args) = @$req; 392 my ($id, $type, @args) = @$req;
378 my $cb = CFPlus::DB::Server->can ("do_$type") 393 my $cb = DC::DB::Server->can ("do_$type")
379 or die "$type: unknown database request type\n"; 394 or die "$type: unknown database request type\n";
380 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 395 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
381 (syswrite $fh, $res) == length $res 396 (syswrite $fh, $res) == length $res
382 or die "DB::write: $!"; 397 or die "DB::write: $!";
383 } 398 }
384 }; 399 };
385 400
386 my $error = $@; 401 my $error = $@;
387 402
388 eval { 403 eval {
389 undef %DB_TABLE;
390 undef $DB_ENV;
391
392 Storable::store_fd [die => $error], $fh; 404 Storable::store_fd [die => $error], $fh;
393 }; 405 };
394 406
395 $DB_ENV->txn_checkpoint (0, 0, 0); 407 warn $error
408 if $error;
409
396 CFPlus::_exit 0; 410 DC::_exit 0;
397 } 411 }
398 412
399 close $fh; 413 close $fh;
400 CFPlus::fh_nonblocking $FH, 1; 414 DC::fh_nonblocking $FH, 1;
401 415
402 $CB{die} = sub { die shift }; 416 $CB{die} = sub { die shift };
403 417
404 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; 418 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
405 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; 419 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
406 $SYNC->again unless $SYNC->is_active;
407} 420}
408 421
409sub stop { 422sub stop {
410 close $FH; 423 close $FH;
411} 424}

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