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

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.8 by root, Thu Jul 5 10:15:17 2007 UTC vs.
Revision 1.29 by root, Wed Dec 26 21:03:21 2007 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 cfplus
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 Carp ();	20	use Carp ();
21	use AnyEvent ();
22	use Storable ();	21	use Storable ();
23
24	use CFPlus;
25
26	sub sync {
27	# for debugging
28	#CFPlus::DB::Server::req (sync => sub { });
29	CFPlus::DB::Server::sync ();
30	}
31
32	sub get($$$) {
33	CFPlus::DB::Server::req (get => @_);
34	}
35
36	sub put($$$$) {
37	CFPlus::DB::Server::req (put => @_);
38	}
39
40	our $tilemap;
41
42	sub get_tile_id_sync($) {
43	my ($hash) = @_;
44
45	# fetch the full face table first
46	unless ($tilemap) {
47	CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });
48	sync;
49	}
50
51	$tilemap->{$hash} \|\|= do {
52	my $id;
53	CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] });
54	sync;
55	$id
56	}
57	}
58
59	package CFPlus::DB::Server;
60
61	use strict;
62
63	use Fcntl;
64	use BerkeleyDB;
65	use Config;	22	use Config;
		23	use BDB;
66		24
67	our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}";	25	use DC;
		26
		27	our $DBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
		28	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
		29
		30	if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$DBDIR") {
		31	rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
		32	print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$DBDIR to $DB_HOME\n";
		33	}
		34
68	our $DB_ENV;	35	our $DB_ENV;
69	our $DB_STATE;	36	our $DB_STATE;
70	our %DB_TABLE;	37	our %DB_TABLE;
71		38
72	sub open_db {	39	sub open_db {
73	mkdir $DB_HOME, 0777;	40	mkdir $DB_HOME, 0777;
74	my $recover = $BerkeleyDB::db_version >= 4.4	41
75	? eval "DB_REGISTER \| DB_RECOVER"	42	$DB_ENV = db_env_create;
		43
		44	$DB_ENV->set_errfile (\*STDERR);
		45	$DB_ENV->set_msgfile (\*STDERR);
		46	$DB_ENV->set_verbose (-1, 1);
		47
		48	$DB_ENV->set_flags (BDB::AUTO_COMMIT \| BDB::LOG_AUTOREMOVE \| BDB::TXN_WRITE_NOSYNC);
		49	$DB_ENV->set_cachesize (0, 2048 * 1024, 0);
		50
		51	db_env_open $DB_ENV, $DB_HOME,
		52	BDB::CREATE \| BDB::REGISTER \| BDB::RECOVER \| BDB::INIT_MPOOL \| BDB::INIT_LOCK \| BDB::INIT_TXN,
76	: 0;	53	0666;
77		54
78	$DB_ENV = new BerkeleyDB::Env	55	$! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
79	-Home => $DB_HOME,
80	-Cachesize => 8_000_000,
81	-ErrFile => "$DB_HOME/errorlog.txt",
82	# -ErrPrefix => "DATABASE",
83	-Verbose => 1,
84	-Flags => DB_CREATE \| DB_RECOVER \| DB_INIT_MPOOL \| DB_INIT_LOCK \| DB_INIT_TXN \| $recover,
85	-SetFlags => DB_AUTO_COMMIT \| DB_LOG_AUTOREMOVE,
86	or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
87		56
88	1	57	1
89	}	58	}
90		59
91	sub table($) {	60	sub table($) {
92	$DB_TABLE{$_[0]} \|\|= do {	61	$DB_TABLE{$_[0]} \|\|= do {
93	my ($table) = @_;	62	my ($table) = @_;
94		63
95	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;	64	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
96		65
97	new BerkeleyDB::Btree	66	my $db = db_create $DB_ENV;
98	-Env => $DB_ENV,	67	$db->set_flags (BDB::CHKSUM);
99	-Filename => $table,	68
100	# -Filename => "database",	69	db_open $db, undef, $table, undef, BDB::BTREE,
101	# -Subname => $table,	70	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
102	-Property => DB_CHKSUM,	71
103	-Flags => DB_CREATE \| DB_UPGRADE,	72	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
104	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"	73
		74	$db
		75	}
		76	}
		77
		78	#############################################################################
		79
		80	unless (eval { open_db }) {
		81	warn "$@";#d#
		82	eval { File::Path::rmtree $DB_HOME };
		83	open_db;
		84	}
		85
		86	our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		87
		88	our $SYNC = EV::timer_ns 0, 60, sub {
		89	$_[0]->stop;
		90	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		91	};
		92
		93	our $tilemap;
		94
		95	sub exists($$$) {
		96	my ($db, $key, $cb) = @_;
		97
		98	my $data;
		99	db_get table $db, undef, $key, $data, 0, sub {
		100	$cb->($! ? () : length $data);
105	}	101	};
106	}	102	}
107		103
108	our $SYNC_INTERVAL = 60;	104	sub get($$$) {
		105	my ($db, $key, $cb) = @_;
		106
		107	my $data;
		108	db_get table $db, undef, $key, $data, 0, sub {
		109	$cb->($! ? () : $data);
		110	};
		111	}
		112
		113	sub put($$$$) {
		114	my ($db, $key, $data, $cb) = @_;
		115
		116	db_put table $db, undef, $key, $data, 0, sub {
		117	$cb->($!);
		118	$SYNC->again unless $SYNC->is_active;
		119	};
		120	}
		121
		122	sub do_table {
		123	my ($db, $cb) = @_;
		124
		125	$db = table $db;
		126
		127	my $cursor = $db->cursor;
		128	my %kv;
		129
		130	for (;;) {
		131	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		132	last if $!;
		133	$kv{$k} = $v;
		134	}
		135
		136	$cb->(\%kv);
		137	}
		138
		139	sub do_get_tile_id {
		140	my ($name, $cb) = @_;
		141
		142	my $table = table "facemap";
		143	my $id;
		144
		145	db_get $table, undef, $name, $id, 0;
		146	return $cb->($id) unless $!;
		147
		148	for (1..100) {
		149	my $txn = $DB_ENV->txn_begin;
		150	db_get $table, $txn, id => $id, 0;
		151
		152	$id = 64 if $id < 64;
		153
		154	++$id;
		155
		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	}
		165
		166	die "maximum number of transaction retries reached - database problems?";
		167	}
		168
		169	sub get_tile_id_sync($) {
		170	my ($name) = @_;
		171
		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 {
		187	my $id;
		188	do_get_tile_id $name, sub {
		189	$id = $_[0];
		190	};
		191	BDB::flush;
		192	$id
		193	}
		194	}
		195
		196	#############################################################################
		197
		198	sub path_of_res($) {
		199	utf8::downgrade $_[0]; # bug in unpack "H*"
		200	"$DB_HOME/res-data-" . unpack "H*", $_[0]
		201	}
		202
		203	sub sync {
		204	# for debugging
		205	#DC::DB::Server::req (sync => sub { });
		206	DC::DB::Server::sync ();
		207	}
		208
		209	sub unlink($$) {
		210	DC::DB::Server::req (unlink => @_);
		211	}
		212
		213	sub read_file($$) {
		214	DC::DB::Server::req (read_file => @_);
		215	}
		216
		217	sub write_file($$$) {
		218	DC::DB::Server::req (write_file => @_);
		219	}
		220
		221	sub prefetch_file($$$) {
		222	DC::DB::Server::req (prefetch_file => @_);
		223	}
		224
		225	sub logprint($$$) {
		226	DC::DB::Server::req (logprint => @_);
		227	}
		228
		229	package DC::DB::Server;
		230
		231	use strict;
		232
		233	use EV ();
		234	use Fcntl;
109		235
110	our %CB;	236	our %CB;
111	our $FH;	237	our $FH;
112	our $ID = "aaa0";	238	our $ID = "aaa0";
113	our ($fh_r_watcher, $fh_w_watcher);	239	our ($fh_r_watcher, $fh_w_watcher);
118	sub fh_write {	244	sub fh_write {
119	my $len = syswrite $FH, $write_buf;	245	my $len = syswrite $FH, $write_buf;
120		246
121	substr $write_buf, 0, $len, "";	247	substr $write_buf, 0, $len, "";
122		248
123	undef $fh_w_watcher	249	$fh_w_watcher->stop
124	unless length $write_buf;	250	unless length $write_buf;
125	}	251	}
126		252
127	sub fh_read {	253	sub fh_read {
128	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	254	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
164		290
165	my $id = ++$ID;	291	my $id = ++$ID;
166	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	292	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
167	$CB{$id} = $cb;	293	$CB{$id} = $cb;
168		294
169	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	295	$fh_w_watcher->start;
170	}	296	}
171		297
172	sub sync_tick {	298	sub do_unlink {
173	req "sync", sub { };	299	unlink $_[0];
174	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
175	}	300	}
176		301
177	sub do_sync {	302	sub do_read_file {
178	$DB_ENV->txn_checkpoint (0, 0, 0);	303	my ($path) = @_;
179	()
180	}
181		304
182	sub do_get {
183	my ($db, $key) = @_;
184
185	utf8::downgrade $key;	305	utf8::downgrade $path;
186	my $data;	306	open my $fh, "<:raw", $path
187	(table $db)->db_get ($key, $data) == 0	307	or return;
188	? $data	308	sysread $fh, my $buf, -s $fh;
189	: ()
190	}
191		309
192	sub do_put {	310	$buf
		311	}
		312
		313	sub do_write_file {
193	my ($db, $key, $data) = @_;	314	my ($path, $data) = @_;
194		315
195	utf8::downgrade $key;	316	utf8::downgrade $path;
196	utf8::downgrade $data;	317	utf8::downgrade $data;
197	(table $db)->db_put ($key => $data)	318	open my $fh, ">:raw", $path
198	}	319	or return;
		320	syswrite $fh, $data;
		321	close $fh;
199		322
200	sub do_table {	323	1
201	my ($db) = @_;
202
203	$db = table $db;
204
205	my $cursor = $db->db_cursor;
206	my %kv;
207	my ($k, $v);
208	$kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
209
210	\%kv
211	}	324	}
212		325
213	sub do_get_tile_id {	326	sub do_prefetch_file {
214	my ($hash) = @_;	327	my ($path, $size) = @_;
215		328
216	my $id;	329	utf8::downgrade $path;
217	my $table = table "facemap";	330	open my $fh, "<:raw", $path
		331	or return;
		332	sysread $fh, my $buf, $size;
218		333
219	return $id	334	1
220	if $table->db_get ($hash, $id) == 0;	335	}
221		336
222	for (1..100) {	337	our %LOG_FH;
223	my $txn = $DB_ENV->txn_begin;
224	my $status = $table->db_get (id => $id);
225	if ($status == 0 \|\| $status == BerkeleyDB::DB_NOTFOUND) {
226	$id = ($id \|\| 64) + 1;
227	if ($table->db_put (id => $id) == 0
228	&& $table->db_put ($hash => $id) == 0) {
229	$txn->txn_commit;
230		338
231	return $id;	339	sub do_logprint {
232	}	340	my ($path, $line) = @_;
		341
		342	$LOG_FH{$path} \|\|= do {
		343	open my $fh, ">>:utf8", $path
		344	or warn "Couldn't open logfile $path: $!";
		345
		346	$fh->autoflush (1);
		347
233	}	348	$fh
234	$txn->txn_abort;
235	}	349	};
236		350
237	die "maximum number of transaction retries reached - database problems?";	351	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		352
		353	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		354	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		355
		356	print { $LOG_FH{$path} } "$ts $line\n"
238	}	357	}
239		358
240	sub run {	359	sub run {
241	($FH, my $fh) = CFPlus::socketpipe;	360	($FH, my $fh) = DC::socketpipe;
242		361
243	my $oldfh = select $FH; $\| = 1; select $oldfh;	362	my $oldfh = select $FH; $\| = 1; select $oldfh;
244	my $oldfh = select $fh; $\| = 1; select $oldfh;	363	my $oldfh = select $fh; $\| = 1; select $oldfh;
245		364
246	my $pid = fork;	365	my $pid = fork;
247		366
248	if (defined $pid && !$pid) {	367	if (defined $pid && !$pid) {
		368	local $SIG{QUIT};
249	local $SIG{__DIE__};	369	local $SIG{__DIE__};
		370	local $SIG{__WARN__};
250	eval {	371	eval {
251	close $FH;	372	close $FH;
252
253	unless (eval { open_db }) {
254	eval { File::Path::rmtree $DB_HOME };
255	open_db;
256	}
257		373
258	while () {	374	while () {
259	4 == read $fh, my $len, 4	375	4 == read $fh, my $len, 4
260	or last;	376	or last;
261	$len = unpack "N", $len;	377	$len = unpack "N", $len;
…		…
263	or die "unexpected eof while reading request";	379	or die "unexpected eof while reading request";
264		380
265	$req = Storable::thaw $req;	381	$req = Storable::thaw $req;
266		382
267	my ($id, $type, @args) = @$req;	383	my ($id, $type, @args) = @$req;
268	my $cb = CFPlus::DB::Server->can ("do_$type")	384	my $cb = DC::DB::Server->can ("do_$type")
269	or die "$type: unknown database request type\n";	385	or die "$type: unknown database request type\n";
270	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	386	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
271	(syswrite $fh, $res) == length $res	387	(syswrite $fh, $res) == length $res
272	or die;	388	or die "DB::write: $!";
273	}	389	}
274	};	390	};
275		391
276	my $error = $@;	392	my $error = $@;
277		393
278	eval {	394	eval {
279	undef %DB_TABLE;
280	undef $DB_ENV;
281
282	Storable::store_fd [die => $error], $fh;	395	Storable::store_fd [die => $error], $fh;
283	};	396	};
284		397
		398	warn $error
		399	if $error;
		400
285	CFPlus::_exit 0;	401	DC::_exit 0;
286	}	402	}
287		403
288	close $fh;	404	close $fh;
289	CFPlus::fh_nonblocking $FH, 1;	405	DC::fh_nonblocking $FH, 1;
290		406
291	$CB{die} = sub { die shift };	407	$CB{die} = sub { die shift };
292		408
293	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	409	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
294		410	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
295	sync_tick;
296	}	411	}
297		412
298	sub stop {	413	sub stop {
299	close $FH;	414	close $FH;
300	}	415	}

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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents): Revision 1.8 by root, Thu Jul 5 10:15:17 2007 UTC vs. Revision 1.29 by root, Wed Dec 26 21:03:21 2007 UTC

Diff Legend

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.8 by root, Thu Jul 5 10:15:17 2007 UTC vs.
Revision 1.29 by root, Wed Dec 26 21:03:21 2007 UTC