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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.3 by root, Fri Apr 6 21:53:56 2007 UTC vs.
Revision 1.27 by root, Wed Dec 26 18:20:46 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;
23 24
24use CFPlus; 25use CFPlus;
26
27our $DBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
28our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
29
30if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$DBDIR") {
31 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
32 print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$DBDIR to $DB_HOME\n";
33}
34
35our $DB_ENV;
36our $DB_STATE;
37our %DB_TABLE;
38
39sub open_db {
40 mkdir $DB_HOME, 0777;
41
42 $DB_ENV = db_env_create;
43
44 $DB_ENV->set_errfile (\*STDERR);
45 $DB_ENV->set_msgfile (\*STDERR);
46 $DB_ENV->set_verbose (-1, 1);
47
48 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC);
49 $DB_ENV->set_cachesize (0, 2048 * 1024, 0);
50
51 db_env_open $DB_ENV, $DB_HOME,
52 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
53 0666;
54
55 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
56
57 1
58}
59
60sub table($) {
61 $DB_TABLE{$_[0]} ||= do {
62 my ($table) = @_;
63
64 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
65
66 my $db = db_create $DB_ENV;
67 $db->set_flags (BDB::CHKSUM);
68
69 db_open $db, undef, $table, undef, BDB::BTREE,
70 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
71
72 $! and "unable to open/create database table $_[0]: ". BDB::strerror;
73
74 $db
75 }
76}
77
78#############################################################################
79
80unless (eval { open_db }) {
81 warn "$@";#d#
82 eval { File::Path::rmtree $DB_HOME };
83 open_db;
84}
85
86our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
87
88our $SYNC = EV::timer_ns 0, 60, sub {
89 $_[0]->stop;
90 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
91};
92
93our $tilemap;
94
95sub exists($$$) {
96 my ($db, $key, $cb) = @_;
97
98 my $data;
99 db_get table $db, undef, $key, $data, 0, sub {
100 $cb->($! ? () : length $data);
101 };
102}
103
104sub get($$$) {
105 my ($db, $key, $cb) = @_;
106
107 my $data;
108 db_get table $db, undef, $key, $data, 0, sub {
109 $cb->($! ? () : $data);
110 };
111}
112
113sub put($$$$) {
114 my ($db, $key, $data, $cb) = @_;
115
116 db_put table $db, undef, $key, $data, 0, sub {
117 $cb->($!);
118 $SYNC->again unless $SYNC->is_active;
119 };
120}
121
122sub do_table {
123 my ($db, $cb) = @_;
124
125 $db = table $db;
126
127 my $cursor = $db->cursor;
128 my %kv;
129
130 for (;;) {
131 db_c_get $cursor, my $k, my $v, BDB::NEXT;
132 last if $!;
133 $kv{$k} = $v;
134 }
135
136 $cb->(\%kv);
137}
138
139sub do_get_tile_id {
140 my ($name, $cb) = @_;
141
142 my $table = table "facemap";
143 my $id;
144
145 db_get $table, undef, $name, $id, 0;
146 return $cb->($id) unless $!;
147
148 for (1..100) {
149 my $txn = $DB_ENV->txn_begin;
150 db_get $table, $txn, id => $id, 0;
151
152 $id = 64 if $id < 64;
153
154 ++$id;
155
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 }
165
166 die "maximum number of transaction retries reached - database problems?";
167}
168
169sub get_tile_id_sync($) {
170 my ($name) = @_;
171
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 CFPlus::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 {
187 my $id;
188 do_get_tile_id $name, sub {
189 $id = $_[0];
190 };
191 BDB::flush;
192 $id
193 }
194}
195
196#############################################################################
197
198sub path_of_res($) {
199 utf8::downgrade $_[0]; # bug in unpack "H*"
200 "$DB_HOME/res-data-" . unpack "H*", $_[0]
201}
25 202
26sub sync { 203sub sync {
27 # for debugging 204 # for debugging
28 #CFPlus::DB::Server::req (sync => sub { }); 205 #CFPlus::DB::Server::req (sync => sub { });
29 CFPlus::DB::Server::sync (); 206 CFPlus::DB::Server::sync ();
30} 207}
31 208
209sub unlink($$) {
210 CFPlus::DB::Server::req (unlink => @_);
211}
212
213sub read_file($$) {
214 CFPlus::DB::Server::req (read_file => @_);
215}
216
217sub write_file($$$) {
218 CFPlus::DB::Server::req (write_file => @_);
219}
220
221sub prefetch_file($$$) {
222 CFPlus::DB::Server::req (prefetch_file => @_);
223}
224
32sub get($$$) { 225sub logprint($$$) {
33 CFPlus::DB::Server::req (get => @_); 226 CFPlus::DB::Server::req (logprint => @_);
34}
35
36sub put($$$$) {
37 CFPlus::DB::Server::req (put => @_);
38}
39
40our $tilemap;
41
42sub get_tile_id_sync($) {
43 my ($hash) = @_;
44
45 # fetch the full face table first
46 unless ($tilemap) {
47 CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });
48 sync;
49 }
50
51 $tilemap->{$hash} ||= do {
52 my $id;
53 CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] });
54 sync;
55 $id
56 }
57} 227}
58 228
59package CFPlus::DB::Server; 229package CFPlus::DB::Server;
60 230
61use strict; 231use strict;
62 232
233use EV ();
63use Fcntl; 234use Fcntl;
64use BerkeleyDB;
65
66our $DB_HOME = "$Crossfire::VARDIR/cfplus";
67our $DB_ENV;
68our $DB_STATE;
69our %DB_TABLE;
70
71sub open_db {
72 mkdir $DB_HOME, 0777;
73 my $recover = $BerkeleyDB::db_version >= 4.4
74 ? eval "DB_REGISTER | DB_RECOVER"
75 : 0;
76
77 $DB_ENV = new BerkeleyDB::Env
78 -Home => $DB_HOME,
79 -Cachesize => 8_000_000,
80 -ErrFile => "$DB_HOME/errorlog.txt",
81# -ErrPrefix => "DATABASE",
82 -Verbose => 1,
83 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
84 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE,
85 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
86
87 1
88}
89
90sub table($) {
91 $DB_TABLE{$_[0]} ||= do {
92 my ($table) = @_;
93
94 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
95
96 new BerkeleyDB::Btree
97 -Env => $DB_ENV,
98 -Filename => $table,
99# -Filename => "database",
100# -Subname => $table,
101 -Property => DB_CHKSUM,
102 -Flags => DB_CREATE | DB_UPGRADE,
103 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
104 }
105}
106
107our $SYNC_INTERVAL = 6;
108 235
109our %CB; 236our %CB;
110our $FH; 237our $FH;
111our $ID = "aaa0"; 238our $ID = "aaa0";
112our ($fh_r_watcher, $fh_w_watcher); 239our ($fh_r_watcher, $fh_w_watcher);
… …
117sub fh_write { 244sub fh_write {
118 my $len = syswrite $FH, $write_buf; 245 my $len = syswrite $FH, $write_buf;
119 246
120 substr $write_buf, 0, $len, ""; 247 substr $write_buf, 0, $len, "";
121 248
122 undef $fh_w_watcher 249 $fh_w_watcher->stop
123 unless length $write_buf; 250 unless length $write_buf;
124} 251}
125 252
126sub fh_read { 253sub fh_read {
127 my $status = sysread $FH, $read_buf, 16384, length $read_buf; 254 my $status = sysread $FH, $read_buf, 16384, length $read_buf;
… …
163 290
164 my $id = ++$ID; 291 my $id = ++$ID;
165 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 292 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
166 $CB{$id} = $cb; 293 $CB{$id} = $cb;
167 294
168 $fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write); 295 $fh_w_watcher->start;
169} 296}
170 297
171sub sync_tick { 298sub do_unlink {
172 req "sync", sub { }; 299 unlink $_[0];
173 $sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
174} 300}
175 301
176sub do_sync {
177 $DB_ENV->txn_checkpoint (0, 0, 0);
178 ()
179}
180
181sub do_get {
182 my ($db, $key) = @_;
183
184 my $data;
185 (table $db)->db_get ($key, $data) == 0
186 ? $data
187 : ()
188}
189
190sub do_put {
191 my ($db, $key, $data) = @_;
192
193 (table $db)->db_put ($key => $data)
194}
195
196sub do_table { 302sub do_read_file {
197 my ($db) = @_;
198
199 $db = table $db;
200
201 my $cursor = $db->db_cursor;
202 my %kv;
203 my ($k, $v);
204 $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
205
206 \%kv
207}
208
209sub do_get_tile_id {
210 my ($hash) = @_; 303 my ($path) = @_;
211 304
212 my $id; 305 utf8::downgrade $path;
213 my $table = table "facemap"; 306 open my $fh, "<:raw", $path
307 or return;
308 sysread $fh, my $buf, -s $fh;
214 309
215 return $id 310 $buf
216 if $table->db_get ($hash, $id) == 0; 311}
217 312
218 for (1..100) { 313sub do_write_file {
219 my $txn = $DB_ENV->txn_begin; 314 my ($path, $data) = @_;
220 my $status = $table->db_get (id => $id);
221 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
222 $id = ($id || 64) + 1;
223 if ($table->db_put (id => $id) == 0
224 && $table->db_put ($hash => $id) == 0) {
225 $txn->txn_commit;
226 315
227 return $id; 316 utf8::downgrade $path;
228 } 317 utf8::downgrade $data;
318 open my $fh, ">:raw", $path
319 or return;
320 syswrite $fh, $data;
321 close $fh;
322
323 1
324}
325
326sub do_prefetch_file {
327 my ($path, $size) = @_;
328
329 utf8::downgrade $path;
330 open my $fh, "<:raw", $path
331 or return;
332 sysread $fh, my $buf, $size;
333
334 1
335}
336
337our %LOG_FH;
338
339sub do_logprint {
340 my ($path, $line) = @_;
341
342 $LOG_FH{$path} ||= do {
343 open my $fh, ">>:utf8", $path
344 or warn "Couldn't open logfile $path: $!";
345
346 $fh->autoflush (1);
347
229 } 348 $fh
230 $txn->txn_abort;
231 } 349 };
232 350
233 die "maximum number of transaction retries reached - database problems?"; 351 my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
352
353 my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
354 $year + 1900, $mon + 1, $mday, $hour, $min, $sec;
355
356 print { $LOG_FH{$path} } "$ts $line\n"
234} 357}
235 358
236sub run { 359sub run {
237 ($FH, my $fh) = CFPlus::socketpipe; 360 ($FH, my $fh) = CFPlus::socketpipe;
238 361
… …
240 my $oldfh = select $fh; $| = 1; select $oldfh; 363 my $oldfh = select $fh; $| = 1; select $oldfh;
241 364
242 my $pid = fork; 365 my $pid = fork;
243 366
244 if (defined $pid && !$pid) { 367 if (defined $pid && !$pid) {
368 local $SIG{QUIT};
245 local $SIG{__DIE__}; 369 local $SIG{__DIE__};
370 local $SIG{__WARN__};
246 eval { 371 eval {
247 close $FH; 372 close $FH;
248
249 unless (eval { open_db }) {
250 File::Path::rmtree $DB_HOME;
251 open_db;
252 }
253 373
254 while () { 374 while () {
255 4 == read $fh, my $len, 4 375 4 == read $fh, my $len, 4
256 or last; 376 or last;
257 $len = unpack "N", $len; 377 $len = unpack "N", $len;
… …
263 my ($id, $type, @args) = @$req; 383 my ($id, $type, @args) = @$req;
264 my $cb = CFPlus::DB::Server->can ("do_$type") 384 my $cb = CFPlus::DB::Server->can ("do_$type")
265 or die "$type: unknown database request type\n"; 385 or die "$type: unknown database request type\n";
266 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 386 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
267 (syswrite $fh, $res) == length $res 387 (syswrite $fh, $res) == length $res
268 or die; 388 or die "DB::write: $!";
269 } 389 }
270 }; 390 };
271 391
272 my $error = $@; 392 my $error = $@;
273 393
274 eval { 394 eval {
275 undef %DB_TABLE;
276 undef $DB_ENV;
277
278 Storable::store_fd [die => $error], $fh; 395 Storable::store_fd [die => $error], $fh;
279 }; 396 };
280 397
398 warn $error
399 if $error;
400
281 CFPlus::_exit 0; 401 CFPlus::_exit 0;
282 } 402 }
283 403
284 close $fh; 404 close $fh;
285 CFPlus::fh_nonblocking $FH, 1; 405 CFPlus::fh_nonblocking $FH, 1;
286 406
287 $CB{die} = sub { die shift }; 407 $CB{die} = sub { die shift };
288 408
289 $fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read); 409 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
410 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
411}
290 412
291 sync_tick; 413sub stop {
414 close $FH;
292} 415}
293 416
2941; 4171;
295 418
296=back 419=back

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