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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.29 by root, Wed Dec 26 21:03:21 2007 UTC vs.
Revision 1.38 by root, Fri Jul 18 22:40:51 2008 UTC

1=head1 NAME 1=head1 NAME
2 2
3DC::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 DC::DB; 7 use DC::DB;
8 8
… …
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 ();
22use Config; 23use Config;
23use BDB; 24use BDB;
24 25
25use DC; 26use DC;
26 27
27our $DBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}"; 28our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
29our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
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 DC::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;
… …
223} 210}
224 211
225sub logprint($$$) { 212sub logprint($$$) {
226 DC::DB::Server::req (logprint => @_); 213 DC::DB::Server::req (logprint => @_);
227} 214}
215
216#############################################################################
228 217
229package DC::DB::Server; 218package DC::DB::Server;
230 219
231use strict; 220use strict;
232 221
… …
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
… …
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 db_env_txn_checkpoint $DB_ENV, 0, 0, 0
442 if $DB_ENV;
443
444 undef $TILE_SEQ;
445 %DB_TABLE = ();
446 undef $DB_ENV;
447}
448
4171; 4491;
418 450
419=back 451=back
420 452
421=head1 AUTHOR 453=head1 AUTHOR

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