[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 1.30 by root, Thu Dec 27 18:35:56 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 (); # finally	21	use Storable ();
		22	use Config;
		23	use BDB;
23		24
24	sub sync {	25	use DC;
25	# for debugging
26	#CFPlus::DB::Server::req (sync => sub { });
27	CFPlus::DB::Server::sync ();
28	}
29		26
30	sub get($$$) {	27	our $DBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
31	CFPlus::DB::Server::req (get => @_);	28	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
32	}
33		29
34	sub put($$$$) {	30	if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$DBDIR") {
35	CFPlus::DB::Server::req (put => @_);	31	rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
		32	print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$DBDIR to $DB_HOME\n";
36	}	33	}
37		34
38	our $tilemap;	35	BDB::max_poll_time 0.03;
39		36
40	sub get_tile_id_sync($) {
41	my ($hash) = @_;
42
43	# fetch the full face table first
44	unless ($tilemap) {
45	CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });
46	sync;
47	}
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	}
56
57	package CFPlus::DB::Server;
58
59	use strict;
60
61	use Fcntl;
62	use BerkeleyDB;
63
64	our $DB_HOME = "$Crossfire::VARDIR/cfplus";
65	our $DB_ENV;	37	our $DB_ENV;
66	our $DB_STATE;	38	our $DB_STATE;
67	our %DB_TABLE;	39	our %DB_TABLE;
68		40
69	sub open_db {	41	sub open_db {
70	mkdir $DB_HOME, 0777;	42	mkdir $DB_HOME, 0777;
71	my $recover = $BerkeleyDB::db_version >= 4.4	43
72	? eval "DB_REGISTER \| DB_RECOVER"	44	$DB_ENV = db_env_create;
		45
		46	$DB_ENV->set_errfile (\*STDERR);
		47	$DB_ENV->set_msgfile (\*STDERR);
		48	$DB_ENV->set_verbose (-1, 1);
		49
		50	$DB_ENV->set_flags (BDB::AUTO_COMMIT \| BDB::LOG_AUTOREMOVE \| BDB::TXN_WRITE_NOSYNC);
		51	$DB_ENV->set_cachesize (0, 2048 * 1024, 0);
		52
		53	db_env_open $DB_ENV, $DB_HOME,
		54	BDB::CREATE \| BDB::REGISTER \| BDB::RECOVER \| BDB::INIT_MPOOL \| BDB::INIT_LOCK \| BDB::INIT_TXN,
73	: 0;	55	0666;
74		56
75	$DB_ENV = new BerkeleyDB::Env	57	$! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
76	-Home => $DB_HOME,
77	-Cachesize => 8_000_000,
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		58
85	1	59	1
86	}	60	}
87		61
88	sub table($) {	62	sub table($) {
89	$DB_TABLE{$_[0]} \|\|= do {	63	$DB_TABLE{$_[0]} \|\|= do {
90	my ($table) = @_;	64	my ($table) = @_;
91		65
92	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;	66	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
93		67
94	new BerkeleyDB::Btree	68	my $db = db_create $DB_ENV;
95	-Env => $DB_ENV,	69	$db->set_flags (BDB::CHKSUM);
96	-Filename => $table,	70
97	# -Filename => "database",	71	db_open $db, undef, $table, undef, BDB::BTREE,
98	# -Subname => $table,	72	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
99	-Property => DB_CHKSUM,	73
100	-Flags => DB_CREATE \| DB_UPGRADE,	74	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
101	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"	75
		76	$db
		77	}
		78	}
		79
		80	#############################################################################
		81
		82	unless (eval { open_db }) {
		83	warn "$@";#d#
		84	eval { File::Path::rmtree $DB_HOME };
		85	open_db;
		86	}
		87
		88	our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		89
		90	our $SYNC = EV::timer_ns 0, 60, sub {
		91	$_[0]->stop;
		92	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		93	};
		94
		95	our $tilemap;
		96
		97	sub exists($$$) {
		98	my ($db, $key, $cb) = @_;
		99
		100	my $data;
		101	db_get table $db, undef, $key, $data, 0, sub {
		102	$cb->($! ? () : length $data);
102	}	103	};
103	}	104	}
104		105
105	our $SYNC_INTERVAL = 6;	106	sub get($$$) {
		107	my ($db, $key, $cb) = @_;
		108
		109	my $data;
		110	db_get table $db, undef, $key, $data, 0, sub {
		111	$cb->($! ? () : $data);
		112	};
		113	}
		114
		115	sub put($$$$) {
		116	my ($db, $key, $data, $cb) = @_;
		117
		118	db_put table $db, undef, $key, $data, 0, sub {
		119	$cb->($!);
		120	$SYNC->again unless $SYNC->is_active;
		121	};
		122	}
		123
		124	sub do_table {
		125	my ($db, $cb) = @_;
		126
		127	$db = table $db;
		128
		129	my $cursor = $db->cursor;
		130	my %kv;
		131
		132	for (;;) {
		133	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		134	last if $!;
		135	$kv{$k} = $v;
		136	}
		137
		138	$cb->(\%kv);
		139	}
		140
		141	sub do_get_tile_id {
		142	my ($name, $cb) = @_;
		143
		144	my $table = table "facemap";
		145	my $id;
		146
		147	db_get $table, undef, $name, $id, 0;
		148	return $cb->($id) unless $!;
		149
		150	for (1..100) {
		151	my $txn = $DB_ENV->txn_begin;
		152	db_get $table, $txn, id => $id, 0;
		153
		154	$id = 64 if $id < 64;
		155
		156	++$id;
		157
		158	db_put $table, $txn, id => $id, 0;
		159	db_txn_finish $txn;
		160
		161	$SYNC->again unless $SYNC->is_active;
		162
		163	return $cb->($id) unless $!;
		164
		165	select undef, undef, undef, 0.01 * rand;
		166	}
		167
		168	die "maximum number of transaction retries reached - database problems?";
		169	}
		170
		171	sub get_tile_id_sync($) {
		172	my ($name) = @_;
		173
		174	$tilemap->{$name} \|\|= do {
		175	my $id;
		176	do_get_tile_id $name, sub {
		177	$id = $_[0];
		178	};
		179	BDB::flush;
		180	$id
		181	}
		182	}
		183
		184	#############################################################################
		185
		186	sub path_of_res($) {
		187	utf8::downgrade $_[0]; # bug in unpack "H*"
		188	"$DB_HOME/res-data-" . unpack "H*", $_[0]
		189	}
		190
		191	sub sync {
		192	# for debugging
		193	#DC::DB::Server::req (sync => sub { });
		194	DC::DB::Server::sync ();
		195	}
		196
		197	sub unlink($$) {
		198	DC::DB::Server::req (unlink => @_);
		199	}
		200
		201	sub read_file($$) {
		202	DC::DB::Server::req (read_file => @_);
		203	}
		204
		205	sub write_file($$$) {
		206	DC::DB::Server::req (write_file => @_);
		207	}
		208
		209	sub prefetch_file($$$) {
		210	DC::DB::Server::req (prefetch_file => @_);
		211	}
		212
		213	sub logprint($$$) {
		214	DC::DB::Server::req (logprint => @_);
		215	}
		216
		217	#############################################################################
		218
		219	# fetch the full face table first
		220	unless ($tilemap) {
		221	do_table facemap => sub {
		222	$tilemap = $_[0];
		223	delete $tilemap->{id};
		224	my %maptile = reverse %$tilemap;#d#
		225	if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
		226	$tilemap = { };#d#
		227	DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		228	}#d#
		229	};
		230	}
		231
		232	package DC::DB::Server;
		233
		234	use strict;
		235
		236	use EV ();
		237	use Fcntl;
106		238
107	our %CB;	239	our %CB;
108	our $FH;	240	our $FH;
109	our $ID = "aaa0";	241	our $ID = "aaa0";
110	our ($fh_r_watcher, $fh_w_watcher);	242	our ($fh_r_watcher, $fh_w_watcher);
115	sub fh_write {	247	sub fh_write {
116	my $len = syswrite $FH, $write_buf;	248	my $len = syswrite $FH, $write_buf;
117		249
118	substr $write_buf, 0, $len, "";	250	substr $write_buf, 0, $len, "";
119		251
120	undef $fh_w_watcher	252	$fh_w_watcher->stop
121	unless length $write_buf;	253	unless length $write_buf;
122	}	254	}
123		255
124	sub fh_read {	256	sub fh_read {
125	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	257	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
161		293
162	my $id = ++$ID;	294	my $id = ++$ID;
163	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	295	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
164	$CB{$id} = $cb;	296	$CB{$id} = $cb;
165		297
166	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	298	$fh_w_watcher->start;
167	}	299	}
168		300
169	sub sync_tick {	301	sub do_unlink {
170	req "sync", sub { };	302	unlink $_[0];
171	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
172	}	303	}
173		304
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 => $data)
192	}
193
194	sub do_table {	305	sub do_read_file {
195	my ($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) = @_;	306	my ($path) = @_;
209		307
210	my $id;	308	utf8::downgrade $path;
211	my $table = table "facemap";	309	open my $fh, "<:raw", $path
		310	or return;
		311	sysread $fh, my $buf, -s $fh;
212		312
213	return $id	313	$buf
214	if $table->db_get ($hash, $id) == 0;	314	}
215		315
216	for (1..100) {	316	sub do_write_file {
217	my $txn = $DB_ENV->txn_begin;	317	my ($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		318
225	return $id;	319	utf8::downgrade $path;
226	}	320	utf8::downgrade $data;
		321	open my $fh, ">:raw", $path
		322	or return;
		323	syswrite $fh, $data;
		324	close $fh;
		325
		326	1
		327	}
		328
		329	sub do_prefetch_file {
		330	my ($path, $size) = @_;
		331
		332	utf8::downgrade $path;
		333	open my $fh, "<:raw", $path
		334	or return;
		335	sysread $fh, my $buf, $size;
		336
		337	1
		338	}
		339
		340	our %LOG_FH;
		341
		342	sub do_logprint {
		343	my ($path, $line) = @_;
		344
		345	$LOG_FH{$path} \|\|= do {
		346	open my $fh, ">>:utf8", $path
		347	or warn "Couldn't open logfile $path: $!";
		348
		349	$fh->autoflush (1);
		350
227	}	351	$fh
228	$txn->txn_abort;
229	}	352	};
230		353
231	die "maximum number of transaction retries reached - database problems?";	354	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		355
		356	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		357	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		358
		359	print { $LOG_FH{$path} } "$ts $line\n"
232	}	360	}
233		361
234	sub run {	362	sub run {
235	($FH, my $fh) = CFPlus::socketpipe;	363	($FH, my $fh) = DC::socketpipe;
236		364
237	my $oldfh = select $FH; $\| = 1; select $oldfh;	365	my $oldfh = select $FH; $\| = 1; select $oldfh;
238	my $oldfh = select $fh; $\| = 1; select $oldfh;	366	my $oldfh = select $fh; $\| = 1; select $oldfh;
239		367
240	my $pid = fork;	368	my $pid = fork;
241		369
242	if (defined $pid && !$pid) {	370	if (defined $pid && !$pid) {
		371	local $SIG{QUIT} = "IGNORE";
243	local $SIG{__DIE__};	372	local $SIG{__DIE__};
		373	local $SIG{__WARN__};
244	eval {	374	eval {
245	close $FH;	375	close $FH;
246
247	unless (eval { open_db }) {
248	File::Path::rmtree $DB_HOME;
249	open_db;
250	}
251		376
252	while () {	377	while () {
253	4 == read $fh, my $len, 4	378	4 == read $fh, my $len, 4
254	or last;	379	or last;
255	$len = unpack "N", $len;	380	$len = unpack "N", $len;
…		…
257	or die "unexpected eof while reading request";	382	or die "unexpected eof while reading request";
258		383
259	$req = Storable::thaw $req;	384	$req = Storable::thaw $req;
260		385
261	my ($id, $type, @args) = @$req;	386	my ($id, $type, @args) = @$req;
262	my $cb = CFPlus::DB::Server->can ("do_$type")	387	my $cb = DC::DB::Server->can ("do_$type")
263	or die "$type: unknown database request type\n";	388	or die "$type: unknown database request type\n";
264	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	389	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
265	(syswrite $fh, $res) == length $res	390	(syswrite $fh, $res) == length $res
266	or die;	391	or die "DB::write: $!";
267	}	392	}
268	};	393	};
269		394
270	my $error = $@;	395	my $error = $@;
271		396
272	eval {	397	eval {
273	undef %DB_TABLE;
274	undef $DB_ENV;
275
276	Storable::store_fd [die => $error], $fh;	398	Storable::store_fd [die => $error], $fh;
277	};	399	};
278		400
		401	warn $error
		402	if $error;
		403
279	CFPlus::_exit 0;	404	DC::_exit 0;
280	}	405	}
281		406
282	close $fh;	407	close $fh;
283	fcntl $FH, F_SETFL, O_NONBLOCK;	408	DC::fh_nonblocking $FH, 1;
284		409
285	$CB{die} = sub { die shift };	410	$CB{die} = sub { die shift };
286		411
287	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	412	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
		413	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
		414	}
288		415
289	sync_tick;	416	sub stop {
		417	close $FH;
290	}	418	}
291		419
292	1;	420	1;
293		421
294	=back	422	=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 1.30 by root, Thu Dec 27 18:35:56 2007 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 1.30 by root, Thu Dec 27 18:35:56 2007 UTC