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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.2 by root, Fri Apr 6 08:09:43 2007 UTC vs.
Revision 1.24 by root, Tue Dec 11 02:42:38 2007 UTC

1=head1 NAME 1=head1 NAME
2 2
3CFPlus::DB - async. database access for cfplus 3CFPlus::DB - async. database and filesystem access for cfplus
4 4
5=head1 SYNOPSIS 5=head1 SYNOPSIS
6 6
7 use CFPlus::DB; 7 use CFPlus::DB;
8 8
… …
16 16
17use strict; 17use strict;
18use utf8; 18use utf8;
19 19
20use Carp (); 20use Carp ();
21use AnyEvent ();
22use Storable (); # finally 21use Storable ();
22use Config;
23use BDB;
24
25use CFPlus;
26
27our $DB_HOME = "$Crossfire::VARDIR/cfplus-" . BDB::VERSION . "-$Config{archname}";
28
29our $DB_ENV;
30our $DB_STATE;
31our %DB_TABLE;
32
33sub open_db {
34 mkdir $DB_HOME, 0777;
35
36 $DB_ENV = db_env_create;
37
38 $DB_ENV->set_errfile (\*STDERR);
39 $DB_ENV->set_msgfile (\*STDERR);
40 $DB_ENV->set_verbose (-1, 1);
41
42 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC);
43 $DB_ENV->set_cachesize (0, 2048 * 1024, 0);
44
45 db_env_open $DB_ENV, $DB_HOME,
46 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
47 0666;
48
49 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
50
51 1
52}
53
54sub table($) {
55 $DB_TABLE{$_[0]} ||= do {
56 my ($table) = @_;
57
58 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
59
60 my $db = db_create $DB_ENV;
61 $db->set_flags (BDB::CHKSUM);
62
63 db_open $db, undef, $table, undef, BDB::BTREE,
64 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
65
66 $! and "unable to open/create database table $_[0]: ". BDB::strerror;
67
68 $db
69 }
70}
71
72#############################################################################
73
74unless (eval { open_db }) {
75 warn "$@";#d#
76 eval { File::Path::rmtree $DB_HOME };
77 open_db;
78}
79
80our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
81
82our $SYNC = EV::timer_ns 0, 60, sub {
83 $_[0]->stop;
84 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
85};
86
87our $tilemap;
88
89sub exists($$$) {
90 my ($db, $key, $cb) = @_;
91
92 my $data;
93 db_get table $db, undef, $key, $data, 0, sub {
94 $cb->($! ? () : length $data);
95 };
96}
97
98sub get($$$) {
99 my ($db, $key, $cb) = @_;
100
101 my $data;
102 db_get table $db, undef, $key, $data, 0, sub {
103 $cb->($! ? () : $data);
104 };
105}
106
107sub put($$$$) {
108 my ($db, $key, $data, $cb) = @_;
109
110 db_put table $db, undef, $key, $data, 0, sub {
111 $cb->($!);
112 $SYNC->again unless $SYNC->is_active;
113 };
114}
115
116sub do_table {
117 my ($db, $cb) = @_;
118
119 $db = table $db;
120
121 my $cursor = $db->cursor;
122 my %kv;
123
124 for (;;) {
125 db_c_get $cursor, my $k, my $v, BDB::NEXT;
126 last if $!;
127 $kv{$k} = $v;
128 }
129
130 $cb->(\%kv);
131}
132
133sub do_get_tile_id {
134 my ($name, $cb) = @_;
135
136 my $table = table "facemap";
137 my $id;
138
139 db_get $table, undef, $name, $id, 0;
140 return $cb->($id) unless $!;
141
142 for (1..100) {
143 my $txn = $DB_ENV->txn_begin;
144 db_get $table, $txn, id => $id, 0;
145
146 $id = 64 if $id < 64;
147
148 ++$id;
149
150 db_put $table, $txn, id => $id, 0;
151 db_txn_finish $txn;
152
153 $SYNC->again unless $SYNC->is_active;
154
155 return $cb->($id) unless $!;
156
157 select undef, undef, undef, 0.01 * rand;
158 }
159
160 die "maximum number of transaction retries reached - database problems?";
161}
162
163sub get_tile_id_sync($) {
164 my ($name) = @_;
165
166 # fetch the full face table first
167 unless ($tilemap) {
168 do_table facemap => sub {
169 $tilemap = $_[0];
170 delete $tilemap->{id};
171 my %maptile = reverse %$tilemap;#d#
172 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
173 $tilemap = { };#d#
174 CFPlus::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
175 }#d#
176 };
177 BDB::flush;
178 }
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#############################################################################
191
192sub path_of_res($) {
193 utf8::downgrade $_[0]; # bug in unpack "H*"
194 "$DB_HOME/res-data-" . unpack "H*", $_[0]
195}
23 196
24sub sync { 197sub sync {
25 # for debugging 198 # for debugging
26 #CFPlus::DB::Server::req (sync => sub { }); 199 #CFPlus::DB::Server::req (sync => sub { });
27 CFPlus::DB::Server::sync (); 200 CFPlus::DB::Server::sync ();
28} 201}
29 202
203sub unlink($$) {
204 CFPlus::DB::Server::req (unlink => @_);
205}
206
207sub read_file($$) {
208 CFPlus::DB::Server::req (read_file => @_);
209}
210
211sub write_file($$$) {
212 CFPlus::DB::Server::req (write_file => @_);
213}
214
215sub prefetch_file($$$) {
216 CFPlus::DB::Server::req (prefetch_file => @_);
217}
218
30sub get($$$) { 219sub logprint($$$) {
31 CFPlus::DB::Server::req (get => @_); 220 CFPlus::DB::Server::req (logprint => @_);
32}
33
34sub put($$$$) {
35 CFPlus::DB::Server::req (put => @_);
36}
37
38our $tilemap;
39
40sub get_tile_id_sync($) {
41 my ($hash) = @_;
42
43 # fetch the full face table first
44 unless ($tilemap) {
45 CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });
46 sync;
47 }
48
49 $tilemap->{$hash} ||= do {
50 my $id;
51 CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] });
52 sync;
53 $id
54 }
55} 221}
56 222
57package CFPlus::DB::Server; 223package CFPlus::DB::Server;
58 224
59use strict; 225use strict;
60 226
227use EV ();
61use Fcntl; 228use Fcntl;
62use BerkeleyDB;
63
64our $DB_HOME = "$Crossfire::VARDIR/cfplus";
65our $DB_ENV;
66our $DB_STATE;
67our %DB_TABLE;
68
69sub open_db {
70 mkdir $DB_HOME, 0777;
71 my $recover = $BerkeleyDB::db_version >= 4.4
72 ? eval "DB_REGISTER | DB_RECOVER"
73 : 0;
74
75 $DB_ENV = new BerkeleyDB::Env
76 -Home => $DB_HOME,
77 -Cachesize => 8_000_000,
78 -ErrFile => "$DB_HOME/errorlog.txt",
79# -ErrPrefix => "DATABASE",
80 -Verbose => 1,
81 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
82 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE,
83 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
84
85 1
86}
87
88sub table($) {
89 $DB_TABLE{$_[0]} ||= do {
90 my ($table) = @_;
91
92 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
93
94 new BerkeleyDB::Btree
95 -Env => $DB_ENV,
96 -Filename => $table,
97# -Filename => "database",
98# -Subname => $table,
99 -Property => DB_CHKSUM,
100 -Flags => DB_CREATE | DB_UPGRADE,
101 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
102 }
103}
104
105our $SYNC_INTERVAL = 6;
106 229
107our %CB; 230our %CB;
108our $FH; 231our $FH;
109our $ID = "aaa0"; 232our $ID = "aaa0";
110our ($fh_r_watcher, $fh_w_watcher); 233our ($fh_r_watcher, $fh_w_watcher);
… …
115sub fh_write { 238sub fh_write {
116 my $len = syswrite $FH, $write_buf; 239 my $len = syswrite $FH, $write_buf;
117 240
118 substr $write_buf, 0, $len, ""; 241 substr $write_buf, 0, $len, "";
119 242
120 undef $fh_w_watcher 243 $fh_w_watcher->stop
121 unless length $write_buf; 244 unless length $write_buf;
122} 245}
123 246
124sub fh_read { 247sub fh_read {
125 my $status = sysread $FH, $read_buf, 16384, length $read_buf; 248 my $status = sysread $FH, $read_buf, 16384, length $read_buf;
… …
161 284
162 my $id = ++$ID; 285 my $id = ++$ID;
163 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 286 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
164 $CB{$id} = $cb; 287 $CB{$id} = $cb;
165 288
166 $fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write); 289 $fh_w_watcher->start;
167} 290}
168 291
169sub sync_tick { 292sub do_unlink {
170 req "sync", sub { }; 293 unlink $_[0];
171 $sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
172} 294}
173 295
174sub do_sync {
175 $DB_ENV->txn_checkpoint (0, 0, 0);
176 ()
177}
178
179sub do_get {
180 my ($db, $key) = @_;
181
182 my $data;
183 (table $db)->db_get ($key, $data) == 0
184 ? $data
185 : ()
186}
187
188sub do_put {
189 my ($db, $key, $data) = @_;
190
191 (table $db)->db_put ($key => $data)
192}
193
194sub do_table { 296sub do_read_file {
195 my ($db) = @_;
196
197 $db = table $db;
198
199 my $cursor = $db->db_cursor;
200 my %kv;
201 my ($k, $v);
202 $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
203
204 \%kv
205}
206
207sub do_get_tile_id {
208 my ($hash) = @_; 297 my ($path) = @_;
209 298
210 my $id; 299 utf8::downgrade $path;
211 my $table = table "facemap"; 300 open my $fh, "<:raw", $path
301 or return;
302 sysread $fh, my $buf, -s $fh;
212 303
213 return $id 304 $buf
214 if $table->db_get ($hash, $id) == 0; 305}
215 306
216 for (1..100) { 307sub do_write_file {
217 my $txn = $DB_ENV->txn_begin; 308 my ($path, $data) = @_;
218 my $status = $table->db_get (id => $id);
219 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
220 $id = ($id || 64) + 1;
221 if ($table->db_put (id => $id) == 0
222 && $table->db_put ($hash => $id) == 0) {
223 $txn->txn_commit;
224 309
225 return $id; 310 utf8::downgrade $path;
226 } 311 utf8::downgrade $data;
312 open my $fh, ">:raw", $path
313 or return;
314 syswrite $fh, $data;
315 close $fh;
316
317 1
318}
319
320sub do_prefetch_file {
321 my ($path, $size) = @_;
322
323 utf8::downgrade $path;
324 open my $fh, "<:raw", $path
325 or return;
326 sysread $fh, my $buf, $size;
327
328 1
329}
330
331our %LOG_FH;
332
333sub do_logprint {
334 my ($path, $line) = @_;
335
336 $LOG_FH{$path} ||= do {
337 open my $fh, ">>:utf8", $path
338 or warn "Couldn't open logfile $path: $!";
339
340 $fh->autoflush (1);
341
227 } 342 $fh
228 $txn->txn_abort;
229 } 343 };
230 344
231 die "maximum number of transaction retries reached - database problems?"; 345 my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
346
347 my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
348 $year + 1900, $mon + 1, $mday, $hour, $min, $sec;
349
350 print { $LOG_FH{$path} } "$ts $line\n"
232} 351}
233 352
234sub run { 353sub run {
235 ($FH, my $fh) = CFPlus::socketpipe; 354 ($FH, my $fh) = CFPlus::socketpipe;
236 355
… …
238 my $oldfh = select $fh; $| = 1; select $oldfh; 357 my $oldfh = select $fh; $| = 1; select $oldfh;
239 358
240 my $pid = fork; 359 my $pid = fork;
241 360
242 if (defined $pid && !$pid) { 361 if (defined $pid && !$pid) {
362 local $SIG{QUIT};
243 local $SIG{__DIE__}; 363 local $SIG{__DIE__};
364 local $SIG{__WARN__};
244 eval { 365 eval {
245 close $FH; 366 close $FH;
246
247 unless (eval { open_db }) {
248 File::Path::rmtree $DB_HOME;
249 open_db;
250 }
251 367
252 while () { 368 while () {
253 4 == read $fh, my $len, 4 369 4 == read $fh, my $len, 4
254 or last; 370 or last;
255 $len = unpack "N", $len; 371 $len = unpack "N", $len;
… …
261 my ($id, $type, @args) = @$req; 377 my ($id, $type, @args) = @$req;
262 my $cb = CFPlus::DB::Server->can ("do_$type") 378 my $cb = CFPlus::DB::Server->can ("do_$type")
263 or die "$type: unknown database request type\n"; 379 or die "$type: unknown database request type\n";
264 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 380 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
265 (syswrite $fh, $res) == length $res 381 (syswrite $fh, $res) == length $res
266 or die; 382 or die "DB::write: $!";
267 } 383 }
268 }; 384 };
269 385
270 my $error = $@; 386 my $error = $@;
271 387
272 eval { 388 eval {
273 undef %DB_TABLE;
274 undef $DB_ENV;
275
276 Storable::store_fd [die => $error], $fh; 389 Storable::store_fd [die => $error], $fh;
277 }; 390 };
278 391
392 warn $error;
393
279 CFPlus::_exit 0; 394 CFPlus::_exit 0;
280 } 395 }
281 396
282 close $fh; 397 close $fh;
283 fcntl $FH, F_SETFL, O_NONBLOCK; 398 CFPlus::fh_nonblocking $FH, 1;
284 399
285 $CB{die} = sub { die shift }; 400 $CB{die} = sub { die shift };
286 401
287 $fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read); 402 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
403 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
404}
288 405
289 sync_tick; 406sub stop {
407 close $FH;
290} 408}
291 409
2921; 4101;
293 411
294=back 412=back

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