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 1.25 by root, Tue Dec 11 03:38:36 2007 UTC vs.
Revision 1.39 by root, Tue Sep 2 04:38:23 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 File::Path ();
20use Carp (); 21use Carp ();
21use Storable (); 22use Storable ();
22use Config; 23use Config;
23use BDB; 24use BDB;
24 25
25use CFPlus; 26use DC;
26 27
27our $DB_HOME = "$Crossfire::VARDIR/cfplus-" . BDB::VERSION . "-$Config{archname}"; 28our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
29our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
30our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
31
32unless (-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/$ODBDIR") {
37 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
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 }
43}
44
45BDB::max_poll_time 0.03;
46BDB::max_parallel 1;
28 47
29our $DB_ENV; 48our $DB_ENV;
30our $DB_STATE; 49our $DB_STATE;
31our %DB_TABLE; 50our %DB_TABLE;
51our $TILE_SEQ;
32 52
33sub open_db { 53sub try_open_db {
34 mkdir $DB_HOME, 0777; 54 File::Path::mkpath [$DB_HOME];
35 55
36 $DB_ENV = db_env_create; 56 my $env = db_env_create;
37 57
38 $DB_ENV->set_errfile (\*STDERR); 58 $env->set_errfile (\*STDERR);
39 $DB_ENV->set_msgfile (\*STDERR); 59 $env->set_msgfile (\*STDERR);
40 $DB_ENV->set_verbose (-1, 1); 60 $env->set_verbose (-1, 1);
41 61
42 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC); 62 $env->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT);
63 $env->set_flags (&BDB::LOG_AUTOREMOVE ) if BDB::VERSION v0, v4.7;
64 $env->log_set_config (&BDB::LOG_AUTO_REMOVE) if BDB::VERSION v4.7;
65
66 $env->set_timeout (3, BDB::SET_TXN_TIMEOUT);
67 $env->set_timeout (3, BDB::SET_LOCK_TIMEOUT);
68
43 $DB_ENV->set_cachesize (0, 2048 * 1024, 0); 69 $env->set_cachesize (0, 2048 * 1024, 0);
44 70
45 db_env_open $DB_ENV, $DB_HOME, 71 db_env_open $env, $DB_HOME,
46 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN, 72 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
47 0666; 73 0666;
48 74
49 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror; 75 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
76
77 $DB_ENV = $env;
50 78
51 1 79 1
52} 80}
53 81
54sub table($) { 82sub table($) {
… …
69 } 97 }
70} 98}
71 99
72############################################################################# 100#############################################################################
73 101
74unless (eval { open_db }) { 102our $WATCHER;
75 warn "$@";#d# 103our $SYNC;
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; 104our $facemap;
88 105
89sub exists($$$) { 106sub exists($$$) {
90 my ($db, $key, $cb) = @_; 107 my ($db, $key, $cb) = @_;
91 108
92 my $data; 109 my $data;
… …
134 my ($name, $cb) = @_; 151 my ($name, $cb) = @_;
135 152
136 my $table = table "facemap"; 153 my $table = table "facemap";
137 my $id; 154 my $id;
138 155
139 db_get $table, undef, $name, $id, 0; 156 db_get $table, undef, $name => $id, 0;
140 return $cb->($id) unless $!; 157 $! or return $cb->($id);
141 158
142 for (1..100) { 159 unless ($TILE_SEQ) {
143 my $txn = $DB_ENV->txn_begin; 160 $TILE_SEQ = $table->sequence;
144 db_get $table, $txn, id => $id, 0; 161 $TILE_SEQ->initial_value (64);
162 $TILE_SEQ->set_cachesize (0);
163 db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
164 }
145 165
146 $id = 64 if $id < 64; 166 db_sequence_get $TILE_SEQ, undef, 1, my $id;
147 167
148 ++$id; 168 die "unable to allocate tile id: $!"
149 169 if $!;
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 } 170
171 db_put $table, undef, $name => $id, 0;
172 $cb->($id);
159 173
160 die "maximum number of transaction retries reached - database problems?";
161} 174}
162 175
163sub get_tile_id_sync($) { 176sub get_tile_id_sync($) {
164 my ($name) = @_; 177 my ($name) = @_;
165 178
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 { 179 $facemap->{$name} ||= do {
181 my $id; 180 my $id;
182 do_get_tile_id $name, sub { 181 do_get_tile_id $name, sub {
183 $id = $_[0]; 182 $id = $_[0];
184 }; 183 };
185 BDB::flush; 184 BDB::flush;
… …
194 "$DB_HOME/res-data-" . unpack "H*", $_[0] 193 "$DB_HOME/res-data-" . unpack "H*", $_[0]
195} 194}
196 195
197sub sync { 196sub sync {
198 # for debugging 197 # for debugging
199 #CFPlus::DB::Server::req (sync => sub { }); 198 #DC::DB::Server::req (sync => sub { });
200 CFPlus::DB::Server::sync (); 199 DC::DB::Server::sync ();
201} 200}
202 201
203sub unlink($$) { 202sub unlink($$) {
204 CFPlus::DB::Server::req (unlink => @_); 203 DC::DB::Server::req (unlink => @_);
205} 204}
206 205
207sub read_file($$) { 206sub read_file($$) {
208 CFPlus::DB::Server::req (read_file => @_); 207 DC::DB::Server::req (read_file => @_);
209} 208}
210 209
211sub write_file($$$) { 210sub write_file($$$) {
212 CFPlus::DB::Server::req (write_file => @_); 211 DC::DB::Server::req (write_file => @_);
213} 212}
214 213
215sub prefetch_file($$$) { 214sub prefetch_file($$$) {
216 CFPlus::DB::Server::req (prefetch_file => @_); 215 DC::DB::Server::req (prefetch_file => @_);
217} 216}
218 217
219sub logprint($$$) { 218sub logprint($$$) {
220 CFPlus::DB::Server::req (logprint => @_); 219 DC::DB::Server::req (logprint => @_);
221} 220}
222 221
222#############################################################################
223
223package CFPlus::DB::Server; 224package DC::DB::Server;
224 225
225use strict; 226use strict;
226 227
227use EV (); 228use EV ();
228use Fcntl; 229use Fcntl;
… …
349 350
350 print { $LOG_FH{$path} } "$ts $line\n" 351 print { $LOG_FH{$path} } "$ts $line\n"
351} 352}
352 353
353sub run { 354sub run {
354 ($FH, my $fh) = CFPlus::socketpipe; 355 ($FH, my $fh) = DC::socketpipe;
355 356
356 my $oldfh = select $FH; $| = 1; select $oldfh; 357 my $oldfh = select $FH; $| = 1; select $oldfh;
357 my $oldfh = select $fh; $| = 1; select $oldfh; 358 my $oldfh = select $fh; $| = 1; select $oldfh;
358 359
359 my $pid = fork; 360 my $pid = fork;
360 361
361 if (defined $pid && !$pid) { 362 if (defined $pid && !$pid) {
362 local $SIG{QUIT}; 363 local $SIG{QUIT} = "IGNORE";
363 local $SIG{__DIE__}; 364 local $SIG{__DIE__};
364 local $SIG{__WARN__}; 365 local $SIG{__WARN__};
365 eval { 366 eval {
366 close $FH; 367 close $FH;
367 368
… …
373 or die "unexpected eof while reading request"; 374 or die "unexpected eof while reading request";
374 375
375 $req = Storable::thaw $req; 376 $req = Storable::thaw $req;
376 377
377 my ($id, $type, @args) = @$req; 378 my ($id, $type, @args) = @$req;
378 my $cb = CFPlus::DB::Server->can ("do_$type") 379 my $cb = DC::DB::Server->can ("do_$type")
379 or die "$type: unknown database request type\n"; 380 or die "$type: unknown database request type\n";
380 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 381 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
381 (syswrite $fh, $res) == length $res 382 (syswrite $fh, $res) == length $res
382 or die "DB::write: $!"; 383 or die "DB::write: $!";
383 } 384 }
… …
390 }; 391 };
391 392
392 warn $error 393 warn $error
393 if $error; 394 if $error;
394 395
395 CFPlus::_exit 0; 396 DC::_exit 0;
396 } 397 }
397 398
398 close $fh; 399 close $fh;
399 CFPlus::fh_nonblocking $FH, 1; 400 DC::fh_nonblocking $FH, 1;
400 401
401 $CB{die} = sub { die shift }; 402 $CB{die} = sub { die shift };
402 403
403 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; 404 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
404 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; 405 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
… …
406 407
407sub stop { 408sub stop {
408 close $FH; 409 close $FH;
409} 410}
410 411
412package DC::DB;
413
414sub nuke_db {
415 File::Path::mkpath [$DB_HOME];
416 eval { File::Path::rmtree $DB_HOME };
417}
418
419sub open_db {
420 unless (eval { try_open_db }) {
421 warn "$@";#d#
422 eval { nuke_db };
423 try_open_db;
424 }
425
426 # fetch the full face table first
427 unless ($facemap) {
428 do_table facemap => sub {
429 $facemap = $_[0];
430 delete $facemap->{id};
431 my %maptile = reverse %$facemap;#d#
432 if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
433 $facemap = { };#d#
434 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
435 }#d#
436 };
437 }
438
439 $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
440 $SYNC = EV::timer_ns 0, 60, sub {
441 $_[0]->stop;
442 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
443 };
444}
445
446END {
447 db_env_txn_checkpoint $DB_ENV, 0, 0, 0
448 if $DB_ENV;
449
450 undef $TILE_SEQ;
451 %DB_TABLE = ();
452 undef $DB_ENV;
453}
454
4111; 4551;
412 456
413=back 457=back
414 458
415=head1 AUTHOR 459=head1 AUTHOR

Diff Legend

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