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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.31 by root, Thu Jan 10 23:02:19 2008 UTC vs.
Revision 1.45 by root, Sat Apr 3 02:58:24 2010 UTC

… …
12 12
13=cut 13=cut
14 14
15package DC::DB; 15package DC::DB;
16 16
17use strict; 17use common::sense;
18use utf8;
19 18
19use File::Path ();
20use Carp (); 20use Carp ();
21use Storable (); 21use Storable ();
22use AnyEvent::Util ();
22use Config; 23use Config;
23use BDB; 24use BDB;
25use Fcntl ();
24 26
25use DC; 27use DC;
26 28
27our $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}"; 29our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
28our $DBDIR = "client-" . BDB::VERSION . "-$Config{archname}"; 30our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
29our $DB_HOME = "$Deliantra::VARDIR/$DBDIR"; 31our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
30 32
33sub FIRST_TILE_ID () { 64 }
34
35unless (-d $DB_HOME) {
31if (!-e $DB_HOME and -e "$Deliantra::VARDIR/$ODBDIR") { 36 if (-d "$Deliantra::VARDIR/$ODBDIR") {
32 rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME; 37 rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
33 print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n"; 38 print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
34}
35
36if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$ODBDIR") { 39 } elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
37 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME; 40 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
38 print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n"; 41 print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
42 } else {
43 File::Path::mkpath [$DB_HOME]
44 or die "unable to create database directory $DB_HOME: $!";
45 }
39} 46}
40 47
41BDB::max_poll_time 0.03; 48BDB::max_poll_time 0.03;
49BDB::max_parallel 1;
42 50
43our $DB_ENV; 51our $DB_ENV;
52our $DB_ENV_FH;
44our $DB_STATE; 53our $DB_STATE;
45our %DB_TABLE; 54our %DB_TABLE;
55our $TILE_SEQ;
46 56
57sub all_databases {
58 opendir my $fh, $DB_HOME
59 or return;
60
61 grep !/^(?:\.|log\.|_)/, readdir $fh
62}
63
64sub try_verify_env($) {
65 my ($env) = @_;
66
67 open my $lock, "+>$DB_HOME/__lock"
68 or die "__lock: $!";
69
70 flock $lock, &Fcntl::LOCK_EX
71 or die "flock: $!";
72
73 # we look at the __db.register env file that has been created by now
74 # and check for the number of registered processes - if there is
75 # only one, we verify all databases, otherwise we skip this
76 # we MUST NOT close the filehandle as longa swe keep the env open, as
77 # this destroys the record locks on it.
78 open $DB_ENV_FH, "<$DB_HOME/__db.register"
79 or die "__db.register: $!";
80
81 # __db.register contains one record per process, with X signifying
82 # empty records (of course, this is completely private to bdb...)
83 my $count = grep /^[^X]/, <$DB_ENV_FH>;
84
85 if ($count == 1) {
86 # if any databases are corrupted, we simply delete all of them
87
88 for (all_databases) {
89 my $dbh = db_create $env
90 or last;
91
92 # a failed verify will panic the environment, which is fine with us
93 db_verify $dbh, "$DB_HOME/$_";
94
95 return if $!; # nuke database and recreate if verification failure
96 }
97
98 }
99
100 # close probably cleans those up, but we also want to run on windows,
101 # so better be safe.
102 flock $lock, &Fcntl::LOCK_UN
103 or die "funlock: $!";
104
105 1
106}
107
47sub open_db { 108sub try_open_db {
48 mkdir $DB_HOME, 0777; 109 File::Path::mkpath [$DB_HOME];
49 110
111 undef $DB_ENV;
112 undef $DB_ENV_FH;
113
50 $DB_ENV = db_env_create; 114 my $env = db_env_create;
51 115
52 $DB_ENV->set_errfile (\*STDERR); 116 $env->set_errfile (\*STDERR);
53 $DB_ENV->set_msgfile (\*STDERR); 117 $env->set_msgfile (\*STDERR);
54 $DB_ENV->set_verbose (-1, 1); 118 $env->set_verbose (-1, 1);
55 119
56 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC); 120 $env->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT);
121 $env->set_flags (&BDB::LOG_AUTOREMOVE ) if BDB::VERSION v0, v4.7;
122 $env->log_set_config (&BDB::LOG_AUTO_REMOVE) if BDB::VERSION v4.7;
123
124 $env->set_timeout (3, BDB::SET_TXN_TIMEOUT);
125 $env->set_timeout (3, BDB::SET_LOCK_TIMEOUT);
126
57 $DB_ENV->set_cachesize (0, 2048 * 1024, 0); 127 $env->set_cachesize (0, 2048 * 1024, 0);
58 128
59 db_env_open $DB_ENV, $DB_HOME, 129 db_env_open $env, $DB_HOME,
60 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN, 130 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
61 0666; 131 0666;
62 132
63 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror; 133 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
134
135 # now we go through the registered processes, if there is only one, we verify all files
136 # to make sure windows didn'T corrupt them (as windows does....)
137 try_verify_env $env
138 or die "database environment failed verification";
139
140 $DB_ENV = $env;
64 141
65 1 142 1
66} 143}
67 144
68sub table($) { 145sub table($) {
69 $DB_TABLE{$_[0]} ||= do { 146 $DB_TABLE{$_[0]} ||= do {
70 my ($table) = @_; 147 my ($table) = @_;
71 148
72 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge; 149 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
73 150
151 $DB_ENV#d#
152 or return ::clienterror ("trying to create table $_[0] with empty db_env $DB_ENV" => 1);#d#
153
74 my $db = db_create $DB_ENV; 154 my $db = db_create $DB_ENV;
75 $db->set_flags (BDB::CHKSUM); 155 $db->set_flags (BDB::CHKSUM);
76 156
77 db_open $db, undef, $table, undef, BDB::BTREE, 157 db_open $db, undef, $table, undef, BDB::BTREE,
78 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666; 158 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
… …
83 } 163 }
84} 164}
85 165
86############################################################################# 166#############################################################################
87 167
88unless (eval { open_db }) { 168our $WATCHER;
89 warn "$@";#d# 169our $SYNC;
90 eval { File::Path::rmtree $DB_HOME };
91 open_db;
92}
93
94our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
95
96our $SYNC = EV::timer_ns 0, 60, sub {
97 $_[0]->stop;
98 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
99};
100
101our $tilemap; 170our $facemap;
102 171
103sub exists($$$) { 172sub exists($$$) {
104 my ($db, $key, $cb) = @_; 173 my ($db, $key, $cb) = @_;
105 174
106 my $data; 175 my $data;
… …
148 my ($name, $cb) = @_; 217 my ($name, $cb) = @_;
149 218
150 my $table = table "facemap"; 219 my $table = table "facemap";
151 my $id; 220 my $id;
152 221
153 db_get $table, undef, $name, $id, 0; 222 db_get $table, undef, $name => $id, 0;
154 return $cb->($id) unless $!; 223 $! or return $cb->($id);
155 224
156 for (1..100) { 225 unless ($TILE_SEQ) {
157 my $txn = $DB_ENV->txn_begin; 226 $TILE_SEQ = $table->sequence;
158 db_get $table, $txn, id => $id, 0; 227 $TILE_SEQ->initial_value (FIRST_TILE_ID);
228 $TILE_SEQ->set_cachesize (0);
229 db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
230 }
159 231
160 $id = 64 if $id < 64; 232 db_sequence_get $TILE_SEQ, undef, 1, my $id;
161 233
162 ++$id; 234 die "unable to allocate tile id: $!"
163 235 if $!;
164 db_put $table, $txn, id => $id, 0;
165 db_txn_finish $txn;
166
167 $SYNC->again unless $SYNC->is_active;
168
169 return $cb->($id) unless $!;
170
171 select undef, undef, undef, 0.01 * rand;
172 } 236
237 db_put $table, undef, $name => $id, 0;
238 $cb->($id);
173 239
174 die "maximum number of transaction retries reached - database problems?";
175} 240}
176 241
177sub get_tile_id_sync($) { 242sub get_tile_id_sync($) {
178 my ($name) = @_; 243 my ($name) = @_;
179 244
180 $tilemap->{$name} ||= do { 245 $facemap->{$name} ||= do {
181 my $id; 246 my $id;
182 do_get_tile_id $name, sub { 247 do_get_tile_id $name, sub {
183 $id = $_[0]; 248 $id = $_[0];
184 }; 249 };
185 BDB::flush; 250 BDB::flush;
… …
220 DC::DB::Server::req (logprint => @_); 285 DC::DB::Server::req (logprint => @_);
221} 286}
222 287
223############################################################################# 288#############################################################################
224 289
225# fetch the full face table first
226unless ($tilemap) {
227 do_table facemap => sub {
228 $tilemap = $_[0];
229 delete $tilemap->{id};
230 my %maptile = reverse %$tilemap;#d#
231 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
232 $tilemap = { };#d#
233 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
234 }#d#
235 };
236}
237
238package DC::DB::Server; 290package DC::DB::Server;
239 291
240use strict; 292use common::sense;
241 293
242use EV (); 294use EV ();
243use Fcntl; 295use Fcntl;
244 296
245our %CB; 297our %CB;
… …
364 416
365 print { $LOG_FH{$path} } "$ts $line\n" 417 print { $LOG_FH{$path} } "$ts $line\n"
366} 418}
367 419
368sub run { 420sub run {
369 ($FH, my $fh) = DC::socketpipe; 421 ($FH, my $fh) = AnyEvent::Util::portable_socketpair
422 or die "unable to create database socketpair: $!";
370 423
371 my $oldfh = select $FH; $| = 1; select $oldfh; 424 my $oldfh = select $FH; $| = 1; select $oldfh;
372 my $oldfh = select $fh; $| = 1; select $oldfh; 425 my $oldfh = select $fh; $| = 1; select $oldfh;
373 426
374 my $pid = fork; 427 my $pid = fork;
… …
421 474
422sub stop { 475sub stop {
423 close $FH; 476 close $FH;
424} 477}
425 478
479package DC::DB;
480
481sub nuke_db {
482 undef $DB_ENV;
483 undef $DB_ENV_FH;
484
485 File::Path::mkpath [$DB_HOME];
486 eval { File::Path::rmtree $DB_HOME };
487}
488
489sub open_db {
490 unless (eval { try_open_db }) {
491 warn "$@";#d#
492 eval { nuke_db };
493 try_open_db;
494 }
495
496 # fetch the full face table first
497 unless ($facemap) {
498 do_table facemap => sub {
499 $facemap = $_[0];
500 delete $facemap->{id};
501 my %maptile = reverse %$facemap;#d#
502 if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
503 $facemap = { };#d#
504 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
505 }#d#
506 };
507 }
508
509 $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
510 $SYNC = EV::timer_ns 0, 60, sub {
511 $_[0]->stop;
512 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
513 };
514}
515
516END {
517 db_env_txn_checkpoint $DB_ENV, 0, 0, 0
518 if $DB_ENV;
519
520 undef $TILE_SEQ;
521 %DB_TABLE = ();
522 undef $DB_ENV;
523}
524
4261; 5251;
427 526
428=back 527=back
429 528
430=head1 AUTHOR 529=head1 AUTHOR

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