[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 1.31 by root, Thu Jan 10 23:02:19 2008 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 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($$$) {	27	our $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
31	CFPlus::DB::Server::req (get => @_);	28	our $DBDIR = "client-" . BDB::VERSION . "-$Config{archname}";
32	}	29	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
33		30
34	sub put($$$$) {	31	if (!-e $DB_HOME and -e "$Deliantra::VARDIR/$ODBDIR") {
35	CFPlus::DB::Server::req (put => @_);	32	rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
		33	print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
36	}	34	}
37		35
38	our $tilemap;	36	if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$ODBDIR") {
39		37	rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
40	sub get_tile_id_sync($) {	38	print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
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	}	39	}
56		40
57	package CFPlus::DB::Server;	41	BDB::max_poll_time 0.03;
58		42
59	use strict;
60
61	use Fcntl;
62	use BerkeleyDB;
63
64	our $DB_HOME = "$Crossfire::VARDIR/cfplus";
65	our $DB_ENV;	43	our $DB_ENV;
66	our $DB_STATE;	44	our $DB_STATE;
67	our %DB_TABLE;	45	our %DB_TABLE;
68		46
69	sub open_db {	47	sub open_db {
70	mkdir $DB_HOME, 0777;	48	mkdir $DB_HOME, 0777;
71	my $recover = $BerkeleyDB::db_version >= 4.4	49
72	? eval "DB_REGISTER \| DB_RECOVER"	50	$DB_ENV = db_env_create;
		51
		52	$DB_ENV->set_errfile (\*STDERR);
		53	$DB_ENV->set_msgfile (\*STDERR);
		54	$DB_ENV->set_verbose (-1, 1);
		55
		56	$DB_ENV->set_flags (BDB::AUTO_COMMIT \| BDB::LOG_AUTOREMOVE \| BDB::TXN_WRITE_NOSYNC);
		57	$DB_ENV->set_cachesize (0, 2048 * 1024, 0);
		58
		59	db_env_open $DB_ENV, $DB_HOME,
		60	BDB::CREATE \| BDB::REGISTER \| BDB::RECOVER \| BDB::INIT_MPOOL \| BDB::INIT_LOCK \| BDB::INIT_TXN,
73	: 0;	61	0666;
74		62
75	$DB_ENV = new BerkeleyDB::Env	63	$! 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		64
85	1	65	1
86	}	66	}
87		67
88	sub table($) {	68	sub table($) {
89	$DB_TABLE{$_[0]} \|\|= do {	69	$DB_TABLE{$_[0]} \|\|= do {
90	my ($table) = @_;	70	my ($table) = @_;
91		71
92	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;	72	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
93		73
94	new BerkeleyDB::Btree	74	my $db = db_create $DB_ENV;
95	-Env => $DB_ENV,	75	$db->set_flags (BDB::CHKSUM);
96	-Filename => $table,	76
97	# -Filename => "database",	77	db_open $db, undef, $table, undef, BDB::BTREE,
98	# -Subname => $table,	78	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
99	-Property => DB_CHKSUM,	79
100	-Flags => DB_CREATE \| DB_UPGRADE,	80	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
101	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"	81
		82	$db
		83	}
		84	}
		85
		86	#############################################################################
		87
		88	unless (eval { open_db }) {
		89	warn "$@";#d#
		90	eval { File::Path::rmtree $DB_HOME };
		91	open_db;
		92	}
		93
		94	our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		95
		96	our $SYNC = EV::timer_ns 0, 60, sub {
		97	$_[0]->stop;
		98	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		99	};
		100
		101	our $tilemap;
		102
		103	sub exists($$$) {
		104	my ($db, $key, $cb) = @_;
		105
		106	my $data;
		107	db_get table $db, undef, $key, $data, 0, sub {
		108	$cb->($! ? () : length $data);
102	}	109	};
103	}	110	}
104		111
105	our $SYNC_INTERVAL = 6;	112	sub get($$$) {
		113	my ($db, $key, $cb) = @_;
		114
		115	my $data;
		116	db_get table $db, undef, $key, $data, 0, sub {
		117	$cb->($! ? () : $data);
		118	};
		119	}
		120
		121	sub put($$$$) {
		122	my ($db, $key, $data, $cb) = @_;
		123
		124	db_put table $db, undef, $key, $data, 0, sub {
		125	$cb->($!);
		126	$SYNC->again unless $SYNC->is_active;
		127	};
		128	}
		129
		130	sub do_table {
		131	my ($db, $cb) = @_;
		132
		133	$db = table $db;
		134
		135	my $cursor = $db->cursor;
		136	my %kv;
		137
		138	for (;;) {
		139	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		140	last if $!;
		141	$kv{$k} = $v;
		142	}
		143
		144	$cb->(\%kv);
		145	}
		146
		147	sub do_get_tile_id {
		148	my ($name, $cb) = @_;
		149
		150	my $table = table "facemap";
		151	my $id;
		152
		153	db_get $table, undef, $name, $id, 0;
		154	return $cb->($id) unless $!;
		155
		156	for (1..100) {
		157	my $txn = $DB_ENV->txn_begin;
		158	db_get $table, $txn, id => $id, 0;
		159
		160	$id = 64 if $id < 64;
		161
		162	++$id;
		163
		164	db_put $table, $txn, id => $id, 0;
		165	db_txn_finish $txn;
		166
		167	$SYNC->again unless $SYNC->is_active;
		168
		169	return $cb->($id) unless $!;
		170
		171	select undef, undef, undef, 0.01 * rand;
		172	}
		173
		174	die "maximum number of transaction retries reached - database problems?";
		175	}
		176
		177	sub get_tile_id_sync($) {
		178	my ($name) = @_;
		179
		180	$tilemap->{$name} \|\|= do {
		181	my $id;
		182	do_get_tile_id $name, sub {
		183	$id = $_[0];
		184	};
		185	BDB::flush;
		186	$id
		187	}
		188	}
		189
		190	#############################################################################
		191
		192	sub path_of_res($) {
		193	utf8::downgrade $_[0]; # bug in unpack "H*"
		194	"$DB_HOME/res-data-" . unpack "H*", $_[0]
		195	}
		196
		197	sub sync {
		198	# for debugging
		199	#DC::DB::Server::req (sync => sub { });
		200	DC::DB::Server::sync ();
		201	}
		202
		203	sub unlink($$) {
		204	DC::DB::Server::req (unlink => @_);
		205	}
		206
		207	sub read_file($$) {
		208	DC::DB::Server::req (read_file => @_);
		209	}
		210
		211	sub write_file($$$) {
		212	DC::DB::Server::req (write_file => @_);
		213	}
		214
		215	sub prefetch_file($$$) {
		216	DC::DB::Server::req (prefetch_file => @_);
		217	}
		218
		219	sub logprint($$$) {
		220	DC::DB::Server::req (logprint => @_);
		221	}
		222
		223	#############################################################################
		224
		225	# fetch the full face table first
		226	unless ($tilemap) {
		227	do_table facemap => sub {
		228	$tilemap = $_[0];
		229	delete $tilemap->{id};
		230	my %maptile = reverse %$tilemap;#d#
		231	if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
		232	$tilemap = { };#d#
		233	DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		234	}#d#
		235	};
		236	}
		237
		238	package DC::DB::Server;
		239
		240	use strict;
		241
		242	use EV ();
		243	use Fcntl;
106		244
107	our %CB;	245	our %CB;
108	our $FH;	246	our $FH;
109	our $ID = "aaa0";	247	our $ID = "aaa0";
110	our ($fh_r_watcher, $fh_w_watcher);	248	our ($fh_r_watcher, $fh_w_watcher);
115	sub fh_write {	253	sub fh_write {
116	my $len = syswrite $FH, $write_buf;	254	my $len = syswrite $FH, $write_buf;
117		255
118	substr $write_buf, 0, $len, "";	256	substr $write_buf, 0, $len, "";
119		257
120	undef $fh_w_watcher	258	$fh_w_watcher->stop
121	unless length $write_buf;	259	unless length $write_buf;
122	}	260	}
123		261
124	sub fh_read {	262	sub fh_read {
125	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	263	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
161		299
162	my $id = ++$ID;	300	my $id = ++$ID;
163	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	301	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
164	$CB{$id} = $cb;	302	$CB{$id} = $cb;
165		303
166	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	304	$fh_w_watcher->start;
167	}	305	}
168		306
169	sub sync_tick {	307	sub do_unlink {
170	req "sync", sub { };	308	unlink $_[0];
171	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
172	}	309	}
173		310
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 => $data)
192	}
193
194	sub do_table {	311	sub do_read_file {
195	my ($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) = @_;	312	my ($path) = @_;
209		313
210	my $id;	314	utf8::downgrade $path;
211	my $table = table "facemap";	315	open my $fh, "<:raw", $path
		316	or return;
		317	sysread $fh, my $buf, -s $fh;
212		318
213	return $id	319	$buf
214	if $table->db_get ($hash, $id) == 0;	320	}
215		321
216	for (1..100) {	322	sub do_write_file {
217	my $txn = $DB_ENV->txn_begin;	323	my ($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		324
225	return $id;	325	utf8::downgrade $path;
226	}	326	utf8::downgrade $data;
		327	open my $fh, ">:raw", $path
		328	or return;
		329	syswrite $fh, $data;
		330	close $fh;
		331
		332	1
		333	}
		334
		335	sub do_prefetch_file {
		336	my ($path, $size) = @_;
		337
		338	utf8::downgrade $path;
		339	open my $fh, "<:raw", $path
		340	or return;
		341	sysread $fh, my $buf, $size;
		342
		343	1
		344	}
		345
		346	our %LOG_FH;
		347
		348	sub do_logprint {
		349	my ($path, $line) = @_;
		350
		351	$LOG_FH{$path} \|\|= do {
		352	open my $fh, ">>:utf8", $path
		353	or warn "Couldn't open logfile $path: $!";
		354
		355	$fh->autoflush (1);
		356
227	}	357	$fh
228	$txn->txn_abort;
229	}	358	};
230		359
231	die "maximum number of transaction retries reached - database problems?";	360	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		361
		362	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		363	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		364
		365	print { $LOG_FH{$path} } "$ts $line\n"
232	}	366	}
233		367
234	sub run {	368	sub run {
235	($FH, my $fh) = CFPlus::socketpipe;	369	($FH, my $fh) = DC::socketpipe;
236		370
237	my $oldfh = select $FH; $\| = 1; select $oldfh;	371	my $oldfh = select $FH; $\| = 1; select $oldfh;
238	my $oldfh = select $fh; $\| = 1; select $oldfh;	372	my $oldfh = select $fh; $\| = 1; select $oldfh;
239		373
240	my $pid = fork;	374	my $pid = fork;
241		375
242	if (defined $pid && !$pid) {	376	if (defined $pid && !$pid) {
		377	local $SIG{QUIT} = "IGNORE";
243	local $SIG{__DIE__};	378	local $SIG{__DIE__};
		379	local $SIG{__WARN__};
244	eval {	380	eval {
245	close $FH;	381	close $FH;
246
247	unless (eval { open_db }) {
248	File::Path::rmtree $DB_HOME;
249	open_db;
250	}
251		382
252	while () {	383	while () {
253	4 == read $fh, my $len, 4	384	4 == read $fh, my $len, 4
254	or last;	385	or last;
255	$len = unpack "N", $len;	386	$len = unpack "N", $len;
…		…
257	or die "unexpected eof while reading request";	388	or die "unexpected eof while reading request";
258		389
259	$req = Storable::thaw $req;	390	$req = Storable::thaw $req;
260		391
261	my ($id, $type, @args) = @$req;	392	my ($id, $type, @args) = @$req;
262	my $cb = CFPlus::DB::Server->can ("do_$type")	393	my $cb = DC::DB::Server->can ("do_$type")
263	or die "$type: unknown database request type\n";	394	or die "$type: unknown database request type\n";
264	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	395	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
265	(syswrite $fh, $res) == length $res	396	(syswrite $fh, $res) == length $res
266	or die;	397	or die "DB::write: $!";
267	}	398	}
268	};	399	};
269		400
270	my $error = $@;	401	my $error = $@;
271		402
272	eval {	403	eval {
273	undef %DB_TABLE;
274	undef $DB_ENV;
275
276	Storable::store_fd [die => $error], $fh;	404	Storable::store_fd [die => $error], $fh;
277	};	405	};
278		406
		407	warn $error
		408	if $error;
		409
279	CFPlus::_exit 0;	410	DC::_exit 0;
280	}	411	}
281		412
282	close $fh;	413	close $fh;
283	fcntl $FH, F_SETFL, O_NONBLOCK;	414	DC::fh_nonblocking $FH, 1;
284		415
285	$CB{die} = sub { die shift };	416	$CB{die} = sub { die shift };
286		417
287	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	418	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
		419	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
		420	}
288		421
289	sync_tick;	422	sub stop {
		423	close $FH;
290	}	424	}
291		425
292	1;	426	1;
293		427
294	=back	428	=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 1.31 by root, Thu Jan 10 23:02:19 2008 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 1.31 by root, Thu Jan 10 23:02:19 2008 UTC