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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.33 by root, Tue Mar 25 21:11:51 2008 UTC vs.
Revision 1.44 by root, Sat Jan 10 20:56:34 2009 UTC

… …
15package DC::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 ();
23use AnyEvent::Util ();
22use Config; 24use Config;
23use BDB; 25use BDB;
26use Fcntl ();
24 27
25use DC; 28use DC;
26 29
27our $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}"; 30our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
28our $DBDIR = "client-" . BDB::VERSION . "-$Config{archname}"; 31our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
29our $DB_HOME = "$Deliantra::VARDIR/$DBDIR"; 32our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
30 33
34sub FIRST_TILE_ID () { 64 }
35
36unless (-d $DB_HOME) {
31if (!-e $DB_HOME and -e "$Deliantra::VARDIR/$ODBDIR") { 37 if (-d "$Deliantra::VARDIR/$ODBDIR") {
32 rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME; 38 rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
33 print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n"; 39 print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
34}
35
36if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$ODBDIR") { 40 } elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
37 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME; 41 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
38 print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n"; 42 print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
43 } else {
44 File::Path::mkpath [$DB_HOME]
45 or die "unable to create database directory $DB_HOME: $!";
46 }
39} 47}
40 48
41BDB::max_poll_time 0.03; 49BDB::max_poll_time 0.03;
42BDB::max_parallel 1; 50BDB::max_parallel 1;
43 51
44our $DB_ENV; 52our $DB_ENV;
53our $DB_ENV_FH;
45our $DB_STATE; 54our $DB_STATE;
46our %DB_TABLE; 55our %DB_TABLE;
56our $TILE_SEQ;
57
58sub all_databases {
59 opendir my $fh, $DB_HOME
60 or return;
61
62 grep !/^(?:\.|log\.|_)/, readdir $fh
63}
64
65sub try_verify_env($) {
66 my ($env) = @_;
67
68 open my $lock, "+>$DB_HOME/__lock"
69 or die "__lock: $!";
70
71 flock $lock, &Fcntl::LOCK_EX
72 or die "flock: $!";
73
74 # we look at the __db.register env file that has been created by now
75 # and check for the number of registered processes - if there is
76 # only one, we verify all databases, otherwise we skip this
77 # we MUST NOT close the filehandle as longa swe keep the env open, as
78 # this destroys the record locks on it.
79 open $DB_ENV_FH, "<$DB_HOME/__db.register"
80 or die "__db.register: $!";
81
82 # __db.register contains one record per process, with X signifying
83 # empty records (of course, this is completely private to bdb...)
84 my $count = grep /^[^X]/, <$DB_ENV_FH>;
85
86 if ($count == 1) {
87 # if any databases are corrupted, we simply delete all of them
88
89 for (all_databases) {
90 my $dbh = db_create $env
91 or last;
92
93 # a failed verify will panic the environment, which is fine with us
94 db_verify $dbh, "$DB_HOME/$_";
95
96 return if $!; # nuke database and recreate if verification failure
97 }
98
99 }
100
101 # close probably cleans those up, but we also want to run on windows,
102 # so better be safe.
103 flock $lock, &Fcntl::LOCK_UN
104 or die "funlock: $!";
105
106 1
107}
47 108
48sub try_open_db { 109sub try_open_db {
49 mkdir $DB_HOME, 0777; 110 File::Path::mkpath [$DB_HOME];
50 111
112 undef $DB_ENV;
113 undef $DB_ENV_FH;
114
51 $DB_ENV = db_env_create; 115 my $env = db_env_create;
52 116
53 $DB_ENV->set_errfile (\*STDERR); 117 $env->set_errfile (\*STDERR);
54 $DB_ENV->set_msgfile (\*STDERR); 118 $env->set_msgfile (\*STDERR);
55 $DB_ENV->set_verbose (-1, 1); 119 $env->set_verbose (-1, 1);
56 120
57 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC); 121 $env->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT);
122 $env->set_flags (&BDB::LOG_AUTOREMOVE ) if BDB::VERSION v0, v4.7;
123 $env->log_set_config (&BDB::LOG_AUTO_REMOVE) if BDB::VERSION v4.7;
124
125 $env->set_timeout (3, BDB::SET_TXN_TIMEOUT);
126 $env->set_timeout (3, BDB::SET_LOCK_TIMEOUT);
127
58 $DB_ENV->set_cachesize (0, 2048 * 1024, 0); 128 $env->set_cachesize (0, 2048 * 1024, 0);
59 129
60 db_env_open $DB_ENV, $DB_HOME, 130 db_env_open $env, $DB_HOME,
61 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN, 131 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
62 0666; 132 0666;
63 133
64 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror; 134 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
135
136 # now we go through the registered processes, if there is only one, we verify all files
137 # to make sure windows didn'T corrupt them (as windows does....)
138 try_verify_env $env
139 or die "database environment failed verification";
140
141 $DB_ENV = $env;
65 142
66 1 143 1
67} 144}
68 145
69sub table($) { 146sub table($) {
70 $DB_TABLE{$_[0]} ||= do { 147 $DB_TABLE{$_[0]} ||= do {
71 my ($table) = @_; 148 my ($table) = @_;
72 149
73 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge; 150 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
74 151
152 $DB_ENV#d#
153 or return ::clienterror ("trying to create table $_[0] with empty db_env $DB_ENV" => 1);#d#
154
75 my $db = db_create $DB_ENV; 155 my $db = db_create $DB_ENV;
76 $db->set_flags (BDB::CHKSUM); 156 $db->set_flags (BDB::CHKSUM);
77 157
78 db_open $db, undef, $table, undef, BDB::BTREE, 158 db_open $db, undef, $table, undef, BDB::BTREE,
79 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666; 159 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
… …
86 166
87############################################################################# 167#############################################################################
88 168
89our $WATCHER; 169our $WATCHER;
90our $SYNC; 170our $SYNC;
91our $tilemap; 171our $facemap;
92 172
93sub exists($$$) { 173sub exists($$$) {
94 my ($db, $key, $cb) = @_; 174 my ($db, $key, $cb) = @_;
95 175
96 my $data; 176 my $data;
… …
138 my ($name, $cb) = @_; 218 my ($name, $cb) = @_;
139 219
140 my $table = table "facemap"; 220 my $table = table "facemap";
141 my $id; 221 my $id;
142 222
143 db_get $table, undef, $name, $id, 0; 223 db_get $table, undef, $name => $id, 0;
144 return $cb->($id) unless $!; 224 $! or return $cb->($id);
145 225
146 for (1..100) { 226 unless ($TILE_SEQ) {
147 my $txn = $DB_ENV->txn_begin; 227 $TILE_SEQ = $table->sequence;
148 db_get $table, $txn, id => $id, 0; 228 $TILE_SEQ->initial_value (FIRST_TILE_ID);
229 $TILE_SEQ->set_cachesize (0);
230 db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
231 }
149 232
150 $id = 64 if $id < 64; 233 db_sequence_get $TILE_SEQ, undef, 1, my $id;
151 234
152 ++$id; 235 die "unable to allocate tile id: $!"
153 236 if $!;
154 db_put $table, $txn, id => $id, 0;
155 db_txn_finish $txn;
156
157 $SYNC->again unless $SYNC->is_active;
158
159 return $cb->($id) unless $!;
160
161 select undef, undef, undef, 0.01 * rand;
162 } 237
238 db_put $table, undef, $name => $id, 0;
239 $cb->($id);
163 240
164 die "maximum number of transaction retries reached - database problems?";
165} 241}
166 242
167sub get_tile_id_sync($) { 243sub get_tile_id_sync($) {
168 my ($name) = @_; 244 my ($name) = @_;
169 245
170 $tilemap->{$name} ||= do { 246 $facemap->{$name} ||= do {
171 my $id; 247 my $id;
172 do_get_tile_id $name, sub { 248 do_get_tile_id $name, sub {
173 $id = $_[0]; 249 $id = $_[0];
174 }; 250 };
175 BDB::flush; 251 BDB::flush;
… …
341 417
342 print { $LOG_FH{$path} } "$ts $line\n" 418 print { $LOG_FH{$path} } "$ts $line\n"
343} 419}
344 420
345sub run { 421sub run {
346 ($FH, my $fh) = DC::socketpipe; 422 ($FH, my $fh) = AnyEvent::Util::portable_socketpair
423 or die "unable to create database socketpair: $!";
347 424
348 my $oldfh = select $FH; $| = 1; select $oldfh; 425 my $oldfh = select $FH; $| = 1; select $oldfh;
349 my $oldfh = select $fh; $| = 1; select $oldfh; 426 my $oldfh = select $fh; $| = 1; select $oldfh;
350 427
351 my $pid = fork; 428 my $pid = fork;
… …
400 close $FH; 477 close $FH;
401} 478}
402 479
403package DC::DB; 480package DC::DB;
404 481
482sub nuke_db {
483 undef $DB_ENV;
484 undef $DB_ENV_FH;
485
486 File::Path::mkpath [$DB_HOME];
487 eval { File::Path::rmtree $DB_HOME };
488}
489
405sub open_db { 490sub open_db {
406 unless (eval { try_open_db }) { 491 unless (eval { try_open_db }) {
407 warn "$@";#d# 492 warn "$@";#d#
408 eval { File::Path::rmtree $DB_HOME }; 493 eval { nuke_db };
409 try_open_db; 494 try_open_db;
410 } 495 }
411 496
412 # fetch the full face table first 497 # fetch the full face table first
413 unless ($tilemap) { 498 unless ($facemap) {
414 do_table facemap => sub { 499 do_table facemap => sub {
415 $tilemap = $_[0]; 500 $facemap = $_[0];
416 delete $tilemap->{id}; 501 delete $facemap->{id};
417 my %maptile = reverse %$tilemap;#d# 502 my %maptile = reverse %$facemap;#d#
418 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d# 503 if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
419 $tilemap = { };#d# 504 $facemap = { };#d#
420 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d# 505 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
421 }#d# 506 }#d#
422 }; 507 };
423 } 508 }
424 509
… …
428 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { }; 513 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
429 }; 514 };
430} 515}
431 516
432END { 517END {
518 db_env_txn_checkpoint $DB_ENV, 0, 0, 0
519 if $DB_ENV;
520
521 undef $TILE_SEQ;
433 %DB_TABLE = (); 522 %DB_TABLE = ();
434 undef $DB_ENV; 523 undef $DB_ENV;
435} 524}
436 525
4371; 5261;

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