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 1.36 by root, Thu Apr 17 03:46:39 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 $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
29our $DBDIR = "client-" . BDB::VERSION . "-$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::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC);
43 $DB_ENV->set_cachesize (0, 2048 * 1024, 0); 63 $env->set_cachesize (0, 2048 * 1024, 0);
44 64
45 db_env_open $DB_ENV, $DB_HOME, 65 db_env_open $env, $DB_HOME,
46 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN, 66 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
47 0666; 67 0666;
48 68
49 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror; 69 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
70
71 $DB_ENV = $env;
50 72
51 1 73 1
52} 74}
53 75
54sub table($) { 76sub table($) {
… …
69 } 91 }
70} 92}
71 93
72############################################################################# 94#############################################################################
73 95
74unless (eval { open_db }) { 96our $WATCHER;
75 warn "$@";#d# 97our $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; 98our $facemap;
88 99
89sub exists($$$) { 100sub exists($$$) {
90 my ($db, $key, $cb) = @_; 101 my ($db, $key, $cb) = @_;
91 102
92 my $data; 103 my $data;
… …
134 my ($name, $cb) = @_; 145 my ($name, $cb) = @_;
135 146
136 my $table = table "facemap"; 147 my $table = table "facemap";
137 my $id; 148 my $id;
138 149
139 db_get $table, undef, $name, $id, 0; 150 db_get $table, undef, $name => $id, 0;
140 return $cb->($id) unless $!; 151 $! or return $cb->($id);
141 152
142 for (1..100) { 153 unless ($TILE_SEQ) {
143 my $txn = $DB_ENV->txn_begin; 154 $TILE_SEQ = $table->sequence;
144 db_get $table, $txn, id => $id, 0; 155 $TILE_SEQ->initial_value (64);
156 $TILE_SEQ->set_cachesize (0);
157 db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
158 }
145 159
146 $id = 64 if $id < 64; 160 db_sequence_get $TILE_SEQ, undef, 1, my $id;
147 161
148 ++$id; 162 die "unable to allocate tile id: $!"
149 163 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 } 164
165 db_put $table, undef, $name => $id, 0;
166 $cb->($id);
159 167
160 die "maximum number of transaction retries reached - database problems?";
161} 168}
162 169
163sub get_tile_id_sync($) { 170sub get_tile_id_sync($) {
164 my ($name) = @_; 171 my ($name) = @_;
165 172
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 { 173 $facemap->{$name} ||= do {
181 my $id; 174 my $id;
182 do_get_tile_id $name, sub { 175 do_get_tile_id $name, sub {
183 $id = $_[0]; 176 $id = $_[0];
184 }; 177 };
185 BDB::flush; 178 BDB::flush;
… …
194 "$DB_HOME/res-data-" . unpack "H*", $_[0] 187 "$DB_HOME/res-data-" . unpack "H*", $_[0]
195} 188}
196 189
197sub sync { 190sub sync {
198 # for debugging 191 # for debugging
199 #CFPlus::DB::Server::req (sync => sub { }); 192 #DC::DB::Server::req (sync => sub { });
200 CFPlus::DB::Server::sync (); 193 DC::DB::Server::sync ();
201} 194}
202 195
203sub unlink($$) { 196sub unlink($$) {
204 CFPlus::DB::Server::req (unlink => @_); 197 DC::DB::Server::req (unlink => @_);
205} 198}
206 199
207sub read_file($$) { 200sub read_file($$) {
208 CFPlus::DB::Server::req (read_file => @_); 201 DC::DB::Server::req (read_file => @_);
209} 202}
210 203
211sub write_file($$$) { 204sub write_file($$$) {
212 CFPlus::DB::Server::req (write_file => @_); 205 DC::DB::Server::req (write_file => @_);
213} 206}
214 207
215sub prefetch_file($$$) { 208sub prefetch_file($$$) {
216 CFPlus::DB::Server::req (prefetch_file => @_); 209 DC::DB::Server::req (prefetch_file => @_);
217} 210}
218 211
219sub logprint($$$) { 212sub logprint($$$) {
220 CFPlus::DB::Server::req (logprint => @_); 213 DC::DB::Server::req (logprint => @_);
221} 214}
222 215
216#############################################################################
217
223package CFPlus::DB::Server; 218package DC::DB::Server;
224 219
225use strict; 220use strict;
226 221
227use EV (); 222use EV ();
228use Fcntl; 223use Fcntl;
… …
349 344
350 print { $LOG_FH{$path} } "$ts $line\n" 345 print { $LOG_FH{$path} } "$ts $line\n"
351} 346}
352 347
353sub run { 348sub run {
354 ($FH, my $fh) = CFPlus::socketpipe; 349 ($FH, my $fh) = DC::socketpipe;
355 350
356 my $oldfh = select $FH; $| = 1; select $oldfh; 351 my $oldfh = select $FH; $| = 1; select $oldfh;
357 my $oldfh = select $fh; $| = 1; select $oldfh; 352 my $oldfh = select $fh; $| = 1; select $oldfh;
358 353
359 my $pid = fork; 354 my $pid = fork;
360 355
361 if (defined $pid && !$pid) { 356 if (defined $pid && !$pid) {
362 local $SIG{QUIT}; 357 local $SIG{QUIT} = "IGNORE";
363 local $SIG{__DIE__}; 358 local $SIG{__DIE__};
364 local $SIG{__WARN__}; 359 local $SIG{__WARN__};
365 eval { 360 eval {
366 close $FH; 361 close $FH;
367 362
… …
373 or die "unexpected eof while reading request"; 368 or die "unexpected eof while reading request";
374 369
375 $req = Storable::thaw $req; 370 $req = Storable::thaw $req;
376 371
377 my ($id, $type, @args) = @$req; 372 my ($id, $type, @args) = @$req;
378 my $cb = CFPlus::DB::Server->can ("do_$type") 373 my $cb = DC::DB::Server->can ("do_$type")
379 or die "$type: unknown database request type\n"; 374 or die "$type: unknown database request type\n";
380 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 375 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
381 (syswrite $fh, $res) == length $res 376 (syswrite $fh, $res) == length $res
382 or die "DB::write: $!"; 377 or die "DB::write: $!";
383 } 378 }
… …
390 }; 385 };
391 386
392 warn $error 387 warn $error
393 if $error; 388 if $error;
394 389
395 CFPlus::_exit 0; 390 DC::_exit 0;
396 } 391 }
397 392
398 close $fh; 393 close $fh;
399 CFPlus::fh_nonblocking $FH, 1; 394 DC::fh_nonblocking $FH, 1;
400 395
401 $CB{die} = sub { die shift }; 396 $CB{die} = sub { die shift };
402 397
403 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; 398 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
404 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; 399 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
… …
406 401
407sub stop { 402sub stop {
408 close $FH; 403 close $FH;
409} 404}
410 405
406package DC::DB;
407
408sub nuke_db {
409 File::Path::mkpath [$DB_HOME];
410 eval { File::Path::rmtree $DB_HOME };
411}
412
413sub open_db {
414 unless (eval { try_open_db }) {
415 warn "$@";#d#
416 eval { nuke_db };
417 try_open_db;
418 }
419
420 # fetch the full face table first
421 unless ($facemap) {
422 do_table facemap => sub {
423 $facemap = $_[0];
424 delete $facemap->{id};
425 my %maptile = reverse %$facemap;#d#
426 if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
427 $facemap = { };#d#
428 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
429 }#d#
430 };
431 }
432
433 $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
434 $SYNC = EV::timer_ns 0, 60, sub {
435 $_[0]->stop;
436 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
437 };
438}
439
440END {
441 undef $TILE_SEQ;
442 %DB_TABLE = ();
443 undef $DB_ENV;
444}
445
4111; 4461;
412 447
413=back 448=back
414 449
415=head1 AUTHOR 450=head1 AUTHOR

Diff Legend

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