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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.27 by root, Wed Dec 26 18:20:46 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 $DBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}"; 28our $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
29our $DBDIR = "client-" . BDB::VERSION . "-$Config{archname}";
28our $DB_HOME = "$Deliantra::VARDIR/$DBDIR"; 30our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
29 31
30if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$DBDIR") { 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/$ODBDIR") {
31 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME; 37 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
32 print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$DBDIR to $DB_HOME\n"; 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 }
33} 43}
44
45BDB::max_poll_time 0.03;
46BDB::max_parallel 1;
34 47
35our $DB_ENV; 48our $DB_ENV;
36our $DB_STATE; 49our $DB_STATE;
37our %DB_TABLE; 50our %DB_TABLE;
51our $TILE_SEQ;
38 52
39sub open_db { 53sub try_open_db {
40 mkdir $DB_HOME, 0777; 54 File::Path::mkpath [$DB_HOME];
41 55
42 $DB_ENV = db_env_create; 56 my $env = db_env_create;
43 57
44 $DB_ENV->set_errfile (\*STDERR); 58 $env->set_errfile (\*STDERR);
45 $DB_ENV->set_msgfile (\*STDERR); 59 $env->set_msgfile (\*STDERR);
46 $DB_ENV->set_verbose (-1, 1); 60 $env->set_verbose (-1, 1);
47 61
48 $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);
49 $DB_ENV->set_cachesize (0, 2048 * 1024, 0); 63 $env->set_cachesize (0, 2048 * 1024, 0);
50 64
51 db_env_open $DB_ENV, $DB_HOME, 65 db_env_open $env, $DB_HOME,
52 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,
53 0666; 67 0666;
54 68
55 $! 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 = $env;
56 72
57 1 73 1
58} 74}
59 75
60sub table($) { 76sub table($) {
… …
75 } 91 }
76} 92}
77 93
78############################################################################# 94#############################################################################
79 95
80unless (eval { open_db }) { 96our $WATCHER;
81 warn "$@";#d# 97our $SYNC;
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; 98our $facemap;
94 99
95sub exists($$$) { 100sub exists($$$) {
96 my ($db, $key, $cb) = @_; 101 my ($db, $key, $cb) = @_;
97 102
98 my $data; 103 my $data;
… …
140 my ($name, $cb) = @_; 145 my ($name, $cb) = @_;
141 146
142 my $table = table "facemap"; 147 my $table = table "facemap";
143 my $id; 148 my $id;
144 149
145 db_get $table, undef, $name, $id, 0; 150 db_get $table, undef, $name => $id, 0;
146 return $cb->($id) unless $!; 151 $! or return $cb->($id);
147 152
148 for (1..100) { 153 unless ($TILE_SEQ) {
149 my $txn = $DB_ENV->txn_begin; 154 $TILE_SEQ = $table->sequence;
150 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 }
151 159
152 $id = 64 if $id < 64; 160 db_sequence_get $TILE_SEQ, undef, 1, my $id;
153 161
154 ++$id; 162 die "unable to allocate tile id: $!"
155 163 if $!;
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 } 164
165 db_put $table, undef, $name => $id, 0;
166 $cb->($id);
165 167
166 die "maximum number of transaction retries reached - database problems?";
167} 168}
168 169
169sub get_tile_id_sync($) { 170sub get_tile_id_sync($) {
170 my ($name) = @_; 171 my ($name) = @_;
171 172
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 { 173 $facemap->{$name} ||= do {
187 my $id; 174 my $id;
188 do_get_tile_id $name, sub { 175 do_get_tile_id $name, sub {
189 $id = $_[0]; 176 $id = $_[0];
190 }; 177 };
191 BDB::flush; 178 BDB::flush;
… …
200 "$DB_HOME/res-data-" . unpack "H*", $_[0] 187 "$DB_HOME/res-data-" . unpack "H*", $_[0]
201} 188}
202 189
203sub sync { 190sub sync {
204 # for debugging 191 # for debugging
205 #CFPlus::DB::Server::req (sync => sub { }); 192 #DC::DB::Server::req (sync => sub { });
206 CFPlus::DB::Server::sync (); 193 DC::DB::Server::sync ();
207} 194}
208 195
209sub unlink($$) { 196sub unlink($$) {
210 CFPlus::DB::Server::req (unlink => @_); 197 DC::DB::Server::req (unlink => @_);
211} 198}
212 199
213sub read_file($$) { 200sub read_file($$) {
214 CFPlus::DB::Server::req (read_file => @_); 201 DC::DB::Server::req (read_file => @_);
215} 202}
216 203
217sub write_file($$$) { 204sub write_file($$$) {
218 CFPlus::DB::Server::req (write_file => @_); 205 DC::DB::Server::req (write_file => @_);
219} 206}
220 207
221sub prefetch_file($$$) { 208sub prefetch_file($$$) {
222 CFPlus::DB::Server::req (prefetch_file => @_); 209 DC::DB::Server::req (prefetch_file => @_);
223} 210}
224 211
225sub logprint($$$) { 212sub logprint($$$) {
226 CFPlus::DB::Server::req (logprint => @_); 213 DC::DB::Server::req (logprint => @_);
227} 214}
228 215
216#############################################################################
217
229package CFPlus::DB::Server; 218package DC::DB::Server;
230 219
231use strict; 220use strict;
232 221
233use EV (); 222use EV ();
234use Fcntl; 223use Fcntl;
… …
355 344
356 print { $LOG_FH{$path} } "$ts $line\n" 345 print { $LOG_FH{$path} } "$ts $line\n"
357} 346}
358 347
359sub run { 348sub run {
360 ($FH, my $fh) = CFPlus::socketpipe; 349 ($FH, my $fh) = DC::socketpipe;
361 350
362 my $oldfh = select $FH; $| = 1; select $oldfh; 351 my $oldfh = select $FH; $| = 1; select $oldfh;
363 my $oldfh = select $fh; $| = 1; select $oldfh; 352 my $oldfh = select $fh; $| = 1; select $oldfh;
364 353
365 my $pid = fork; 354 my $pid = fork;
366 355
367 if (defined $pid && !$pid) { 356 if (defined $pid && !$pid) {
368 local $SIG{QUIT}; 357 local $SIG{QUIT} = "IGNORE";
369 local $SIG{__DIE__}; 358 local $SIG{__DIE__};
370 local $SIG{__WARN__}; 359 local $SIG{__WARN__};
371 eval { 360 eval {
372 close $FH; 361 close $FH;
373 362
… …
379 or die "unexpected eof while reading request"; 368 or die "unexpected eof while reading request";
380 369
381 $req = Storable::thaw $req; 370 $req = Storable::thaw $req;
382 371
383 my ($id, $type, @args) = @$req; 372 my ($id, $type, @args) = @$req;
384 my $cb = CFPlus::DB::Server->can ("do_$type") 373 my $cb = DC::DB::Server->can ("do_$type")
385 or die "$type: unknown database request type\n"; 374 or die "$type: unknown database request type\n";
386 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 375 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
387 (syswrite $fh, $res) == length $res 376 (syswrite $fh, $res) == length $res
388 or die "DB::write: $!"; 377 or die "DB::write: $!";
389 } 378 }
… …
396 }; 385 };
397 386
398 warn $error 387 warn $error
399 if $error; 388 if $error;
400 389
401 CFPlus::_exit 0; 390 DC::_exit 0;
402 } 391 }
403 392
404 close $fh; 393 close $fh;
405 CFPlus::fh_nonblocking $FH, 1; 394 DC::fh_nonblocking $FH, 1;
406 395
407 $CB{die} = sub { die shift }; 396 $CB{die} = sub { die shift };
408 397
409 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; 398 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
410 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; 399 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
… …
412 401
413sub stop { 402sub stop {
414 close $FH; 403 close $FH;
415} 404}
416 405
406package DC::DB;
407
408sub nuke_db {
409 File::Path::mkpath [$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
4171; 4461;
418 447
419=back 448=back
420 449
421=head1 AUTHOR 450=head1 AUTHOR

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