[ViewVC] Diff of: cvs/deliantra/Deliantra-Client/DC/DB.pm

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.2 by root, Fri Apr 6 08:09:43 2007 UTC vs.
Revision 1.42 by root, Sun Jan 4 10:22:19 2009 UTC

…		…
1	=head1 NAME	1	=head1 NAME
2		2
3	CFPlus::DB - async. database access for cfplus	3	DC::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
15	package CFPlus::DB;	15	package DC::DB;
16		16
17	use strict;	17	use strict;
18	use utf8;	18	use utf8;
19		19
		20	use File::Path ();
20	use Carp ();	21	use Carp ();
		22	use Storable ();
21	use AnyEvent ();	23	use AnyEvent::Util ();
22	use Storable (); # finally	24	use Config;
		25	use BDB;
23		26
24	sub sync {	27	use DC;
25	# for debugging
26	#CFPlus::DB::Server::req (sync => sub { });
27	CFPlus::DB::Server::sync ();
28	}
29		28
30	sub get($$$) {	29	our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
31	CFPlus::DB::Server::req (get => @_);	30	our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
32	}	31	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
33		32
34	sub put($$$$) {	33	sub FIRST_TILE_ID () { 64 }
35	CFPlus::DB::Server::req (put => @_);
36	}
37		34
38	our $tilemap;	35	unless (-d $DB_HOME) {
39		36	if (-d "$Deliantra::VARDIR/$ODBDIR") {
40	sub get_tile_id_sync($) {	37	rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
41	my ($hash) = @_;	38	print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
42		39	} elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
43	# fetch the full face table first	40	rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
44	unless ($tilemap) {	41	print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
45	CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });	42	} else {
46	sync;	43	File::Path::mkpath [$DB_HOME]
		44	or die "unable to create database directory $DB_HOME: $!";
47	}	45	}
48
49	$tilemap->{$hash} \|\|= do {
50	my $id;
51	CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] });
52	sync;
53	$id
54	}
55	}	46	}
56		47
57	package CFPlus::DB::Server;	48	BDB::max_poll_time 0.03;
		49	BDB::max_parallel 1;
58		50
59	use strict;
60
61	use Fcntl;
62	use BerkeleyDB;
63
64	our $DB_HOME = "$Crossfire::VARDIR/cfplus";
65	our $DB_ENV;	51	our $DB_ENV;
66	our $DB_STATE;	52	our $DB_STATE;
67	our %DB_TABLE;	53	our %DB_TABLE;
		54	our $TILE_SEQ;
68		55
69	sub open_db {	56	sub try_open_db {
70	mkdir $DB_HOME, 0777;	57	File::Path::mkpath [$DB_HOME];
71	my $recover = $BerkeleyDB::db_version >= 4.4	58
72	? eval "DB_REGISTER \| DB_RECOVER"	59	my $env = db_env_create;
		60
		61	$env->set_errfile (\*STDERR);
		62	$env->set_msgfile (\*STDERR);
		63	$env->set_verbose (-1, 1);
		64
		65	$env->set_flags (BDB::AUTO_COMMIT \| BDB::REGION_INIT);
		66	$env->set_flags (&BDB::LOG_AUTOREMOVE ) if BDB::VERSION v0, v4.7;
		67	$env->log_set_config (&BDB::LOG_AUTO_REMOVE) if BDB::VERSION v4.7;
		68
		69	$env->set_timeout (3, BDB::SET_TXN_TIMEOUT);
		70	$env->set_timeout (3, BDB::SET_LOCK_TIMEOUT);
		71
		72	$env->set_cachesize (0, 2048 * 1024, 0);
		73
		74	db_env_open $env, $DB_HOME,
		75	BDB::CREATE \| BDB::REGISTER \| BDB::RECOVER \| BDB::INIT_MPOOL \| BDB::INIT_LOCK \| BDB::INIT_TXN,
73	: 0;	76	0666;
74		77
75	$DB_ENV = new BerkeleyDB::Env	78	$! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
76	-Home => $DB_HOME,	79
77	-Cachesize => 8_000_000,	80	$DB_ENV = $env;
78	-ErrFile => "$DB_HOME/errorlog.txt",
79	# -ErrPrefix => "DATABASE",
80	-Verbose => 1,
81	-Flags => DB_CREATE \| DB_RECOVER \| DB_INIT_MPOOL \| DB_INIT_LOCK \| DB_INIT_TXN \| $recover,
82	-SetFlags => DB_AUTO_COMMIT \| DB_LOG_AUTOREMOVE,
83	or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
84		81
85	1	82	1
86	}	83	}
87		84
88	sub table($) {	85	sub table($) {
89	$DB_TABLE{$_[0]} \|\|= do {	86	$DB_TABLE{$_[0]} \|\|= do {
90	my ($table) = @_;	87	my ($table) = @_;
91		88
92	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;	89	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
93		90
94	new BerkeleyDB::Btree	91	$DB_ENV#d#
95	-Env => $DB_ENV,	92	or return ::clienterror ("trying to create table $_[0] with empty db_env $DB_ENV" => 1);#d#
96	-Filename => $table,	93
97	# -Filename => "database",	94	my $db = db_create $DB_ENV;
98	# -Subname => $table,	95	$db->set_flags (BDB::CHKSUM);
99	-Property => DB_CHKSUM,	96
100	-Flags => DB_CREATE \| DB_UPGRADE,	97	db_open $db, undef, $table, undef, BDB::BTREE,
101	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"	98	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
		99
		100	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
		101
		102	$db
		103	}
		104	}
		105
		106	#############################################################################
		107
		108	our $WATCHER;
		109	our $SYNC;
		110	our $facemap;
		111
		112	sub exists($$$) {
		113	my ($db, $key, $cb) = @_;
		114
		115	my $data;
		116	db_get table $db, undef, $key, $data, 0, sub {
		117	$cb->($! ? () : length $data);
102	}	118	};
103	}	119	}
104		120
105	our $SYNC_INTERVAL = 6;	121	sub get($$$) {
		122	my ($db, $key, $cb) = @_;
		123
		124	my $data;
		125	db_get table $db, undef, $key, $data, 0, sub {
		126	$cb->($! ? () : $data);
		127	};
		128	}
		129
		130	sub put($$$$) {
		131	my ($db, $key, $data, $cb) = @_;
		132
		133	db_put table $db, undef, $key, $data, 0, sub {
		134	$cb->($!);
		135	$SYNC->again unless $SYNC->is_active;
		136	};
		137	}
		138
		139	sub do_table {
		140	my ($db, $cb) = @_;
		141
		142	$db = table $db;
		143
		144	my $cursor = $db->cursor;
		145	my %kv;
		146
		147	for (;;) {
		148	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		149	last if $!;
		150	$kv{$k} = $v;
		151	}
		152
		153	$cb->(\%kv);
		154	}
		155
		156	sub do_get_tile_id {
		157	my ($name, $cb) = @_;
		158
		159	my $table = table "facemap";
		160	my $id;
		161
		162	db_get $table, undef, $name => $id, 0;
		163	$! or return $cb->($id);
		164
		165	unless ($TILE_SEQ) {
		166	$TILE_SEQ = $table->sequence;
		167	$TILE_SEQ->initial_value (FIRST_TILE_ID);
		168	$TILE_SEQ->set_cachesize (0);
		169	db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
		170	}
		171
		172	db_sequence_get $TILE_SEQ, undef, 1, my $id;
		173
		174	die "unable to allocate tile id: $!"
		175	if $!;
		176
		177	db_put $table, undef, $name => $id, 0;
		178	$cb->($id);
		179
		180	}
		181
		182	sub get_tile_id_sync($) {
		183	my ($name) = @_;
		184
		185	$facemap->{$name} \|\|= do {
		186	my $id;
		187	do_get_tile_id $name, sub {
		188	$id = $_[0];
		189	};
		190	BDB::flush;
		191	$id
		192	}
		193	}
		194
		195	#############################################################################
		196
		197	sub path_of_res($) {
		198	utf8::downgrade $_[0]; # bug in unpack "H*"
		199	"$DB_HOME/res-data-" . unpack "H*", $_[0]
		200	}
		201
		202	sub sync {
		203	# for debugging
		204	#DC::DB::Server::req (sync => sub { });
		205	DC::DB::Server::sync ();
		206	}
		207
		208	sub unlink($$) {
		209	DC::DB::Server::req (unlink => @_);
		210	}
		211
		212	sub read_file($$) {
		213	DC::DB::Server::req (read_file => @_);
		214	}
		215
		216	sub write_file($$$) {
		217	DC::DB::Server::req (write_file => @_);
		218	}
		219
		220	sub prefetch_file($$$) {
		221	DC::DB::Server::req (prefetch_file => @_);
		222	}
		223
		224	sub logprint($$$) {
		225	DC::DB::Server::req (logprint => @_);
		226	}
		227
		228	#############################################################################
		229
		230	package DC::DB::Server;
		231
		232	use strict;
		233
		234	use EV ();
		235	use Fcntl;
106		236
107	our %CB;	237	our %CB;
108	our $FH;	238	our $FH;
109	our $ID = "aaa0";	239	our $ID = "aaa0";
110	our ($fh_r_watcher, $fh_w_watcher);	240	our ($fh_r_watcher, $fh_w_watcher);
115	sub fh_write {	245	sub fh_write {
116	my $len = syswrite $FH, $write_buf;	246	my $len = syswrite $FH, $write_buf;
117		247
118	substr $write_buf, 0, $len, "";	248	substr $write_buf, 0, $len, "";
119		249
120	undef $fh_w_watcher	250	$fh_w_watcher->stop
121	unless length $write_buf;	251	unless length $write_buf;
122	}	252	}
123		253
124	sub fh_read {	254	sub fh_read {
125	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	255	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
161		291
162	my $id = ++$ID;	292	my $id = ++$ID;
163	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	293	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
164	$CB{$id} = $cb;	294	$CB{$id} = $cb;
165		295
166	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	296	$fh_w_watcher->start;
167	}	297	}
168		298
169	sub sync_tick {	299	sub do_unlink {
170	req "sync", sub { };	300	unlink $_[0];
171	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
172	}	301	}
173		302
174	sub do_sync {
175	$DB_ENV->txn_checkpoint (0, 0, 0);
176	()
177	}
178
179	sub do_get {
180	my ($db, $key) = @_;
181
182	my $data;
183	(table $db)->db_get ($key, $data) == 0
184	? $data
185	: ()
186	}
187
188	sub do_put {
189	my ($db, $key, $data) = @_;
190
191	(table $db)->db_put ($key => $data)
192	}
193
194	sub do_table {	303	sub do_read_file {
195	my ($db) = @_;
196
197	$db = table $db;
198
199	my $cursor = $db->db_cursor;
200	my %kv;
201	my ($k, $v);
202	$kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
203
204	\%kv
205	}
206
207	sub do_get_tile_id {
208	my ($hash) = @_;	304	my ($path) = @_;
209		305
210	my $id;	306	utf8::downgrade $path;
211	my $table = table "facemap";	307	open my $fh, "<:raw", $path
		308	or return;
		309	sysread $fh, my $buf, -s $fh;
212		310
213	return $id	311	$buf
214	if $table->db_get ($hash, $id) == 0;	312	}
215		313
216	for (1..100) {	314	sub do_write_file {
217	my $txn = $DB_ENV->txn_begin;	315	my ($path, $data) = @_;
218	my $status = $table->db_get (id => $id);
219	if ($status == 0 \|\| $status == BerkeleyDB::DB_NOTFOUND) {
220	$id = ($id \|\| 64) + 1;
221	if ($table->db_put (id => $id) == 0
222	&& $table->db_put ($hash => $id) == 0) {
223	$txn->txn_commit;
224		316
225	return $id;	317	utf8::downgrade $path;
226	}	318	utf8::downgrade $data;
		319	open my $fh, ">:raw", $path
		320	or return;
		321	syswrite $fh, $data;
		322	close $fh;
		323
		324	1
		325	}
		326
		327	sub do_prefetch_file {
		328	my ($path, $size) = @_;
		329
		330	utf8::downgrade $path;
		331	open my $fh, "<:raw", $path
		332	or return;
		333	sysread $fh, my $buf, $size;
		334
		335	1
		336	}
		337
		338	our %LOG_FH;
		339
		340	sub do_logprint {
		341	my ($path, $line) = @_;
		342
		343	$LOG_FH{$path} \|\|= do {
		344	open my $fh, ">>:utf8", $path
		345	or warn "Couldn't open logfile $path: $!";
		346
		347	$fh->autoflush (1);
		348
227	}	349	$fh
228	$txn->txn_abort;
229	}	350	};
230		351
231	die "maximum number of transaction retries reached - database problems?";	352	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		353
		354	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		355	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		356
		357	print { $LOG_FH{$path} } "$ts $line\n"
232	}	358	}
233		359
234	sub run {	360	sub run {
235	($FH, my $fh) = CFPlus::socketpipe;	361	($FH, my $fh) = AnyEvent::Util::portable_socketpair
		362	or die "unable to create database socketpair: $!";
236		363
237	my $oldfh = select $FH; $\| = 1; select $oldfh;	364	my $oldfh = select $FH; $\| = 1; select $oldfh;
238	my $oldfh = select $fh; $\| = 1; select $oldfh;	365	my $oldfh = select $fh; $\| = 1; select $oldfh;
239		366
240	my $pid = fork;	367	my $pid = fork;
241		368
242	if (defined $pid && !$pid) {	369	if (defined $pid && !$pid) {
		370	local $SIG{QUIT} = "IGNORE";
243	local $SIG{__DIE__};	371	local $SIG{__DIE__};
		372	local $SIG{__WARN__};
244	eval {	373	eval {
245	close $FH;	374	close $FH;
246
247	unless (eval { open_db }) {
248	File::Path::rmtree $DB_HOME;
249	open_db;
250	}
251		375
252	while () {	376	while () {
253	4 == read $fh, my $len, 4	377	4 == read $fh, my $len, 4
254	or last;	378	or last;
255	$len = unpack "N", $len;	379	$len = unpack "N", $len;
…		…
257	or die "unexpected eof while reading request";	381	or die "unexpected eof while reading request";
258		382
259	$req = Storable::thaw $req;	383	$req = Storable::thaw $req;
260		384
261	my ($id, $type, @args) = @$req;	385	my ($id, $type, @args) = @$req;
262	my $cb = CFPlus::DB::Server->can ("do_$type")	386	my $cb = DC::DB::Server->can ("do_$type")
263	or die "$type: unknown database request type\n";	387	or die "$type: unknown database request type\n";
264	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	388	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
265	(syswrite $fh, $res) == length $res	389	(syswrite $fh, $res) == length $res
266	or die;	390	or die "DB::write: $!";
267	}	391	}
268	};	392	};
269		393
270	my $error = $@;	394	my $error = $@;
271		395
272	eval {	396	eval {
273	undef %DB_TABLE;
274	undef $DB_ENV;
275
276	Storable::store_fd [die => $error], $fh;	397	Storable::store_fd [die => $error], $fh;
277	};	398	};
278		399
		400	warn $error
		401	if $error;
		402
279	CFPlus::_exit 0;	403	DC::_exit 0;
280	}	404	}
281		405
282	close $fh;	406	close $fh;
283	fcntl $FH, F_SETFL, O_NONBLOCK;	407	DC::fh_nonblocking $FH, 1;
284		408
285	$CB{die} = sub { die shift };	409	$CB{die} = sub { die shift };
286		410
287	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	411	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
		412	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
		413	}
288		414
289	sync_tick;	415	sub stop {
		416	close $FH;
		417	}
		418
		419	package DC::DB;
		420
		421	sub nuke_db {
		422	File::Path::mkpath [$DB_HOME];
		423	eval { File::Path::rmtree $DB_HOME };
		424	}
		425
		426	sub open_db {
		427	unless (eval { try_open_db }) {
		428	warn "$@";#d#
		429	eval { nuke_db };
		430	try_open_db;
		431	}
		432
		433	# fetch the full face table first
		434	unless ($facemap) {
		435	do_table facemap => sub {
		436	$facemap = $_[0];
		437	delete $facemap->{id};
		438	my %maptile = reverse %$facemap;#d#
		439	if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
		440	$facemap = { };#d#
		441	DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		442	}#d#
		443	};
		444	}
		445
		446	$WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		447	$SYNC = EV::timer_ns 0, 60, sub {
		448	$_[0]->stop;
		449	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		450	};
		451	}
		452
		453	END {
		454	db_env_txn_checkpoint $DB_ENV, 0, 0, 0
		455	if $DB_ENV;
		456
		457	undef $TILE_SEQ;
		458	%DB_TABLE = ();
		459	undef $DB_ENV;
290	}	460	}
291		461
292	1;	462	1;
293		463
294	=back	464	=back

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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents): Revision 1.2 by root, Fri Apr 6 08:09:43 2007 UTC vs. Revision 1.42 by root, Sun Jan 4 10:22:19 2009 UTC

Diff Legend

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.2 by root, Fri Apr 6 08:09:43 2007 UTC vs.
Revision 1.42 by root, Sun Jan 4 10:22:19 2009 UTC