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

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.12 by root, Tue Jul 24 04:54:47 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 and filesystem 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 ();
21	use AnyEvent ();
22	use Storable ();	22	use Storable ();
		23	use AnyEvent::Util ();
23	use Config;	24	use Config;
		25	use BDB;
24		26
25	use CFPlus;	27	use DC;
26		28
27	our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}";	29	our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
		30	our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
		31	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
		32
		33	sub FIRST_TILE_ID () { 64 }
		34
		35	unless (-d $DB_HOME) {
		36	if (-d "$Deliantra::VARDIR/$ODBDIR") {
		37	rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
		38	print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
		39	} elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
		40	rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
		41	print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
		42	} else {
		43	File::Path::mkpath [$DB_HOME]
		44	or die "unable to create database directory $DB_HOME: $!";
		45	}
		46	}
		47
		48	BDB::max_poll_time 0.03;
		49	BDB::max_parallel 1;
		50
		51	our $DB_ENV;
		52	our $DB_STATE;
		53	our %DB_TABLE;
		54	our $TILE_SEQ;
		55
		56	sub try_open_db {
		57	File::Path::mkpath [$DB_HOME];
		58
		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,
		76	0666;
		77
		78	$! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
		79
		80	$DB_ENV = $env;
		81
		82	1
		83	}
		84
		85	sub table($) {
		86	$DB_TABLE{$_[0]} \|\|= do {
		87	my ($table) = @_;
		88
		89	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
		90
		91	$DB_ENV#d#
		92	or return ::clienterror ("trying to create table $_[0] with empty db_env $DB_ENV" => 1);#d#
		93
		94	my $db = db_create $DB_ENV;
		95	$db->set_flags (BDB::CHKSUM);
		96
		97	db_open $db, undef, $table, undef, BDB::BTREE,
		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($$$) {
		113	my ($db, $key, $cb) = @_;
		114
		115	my $data;
		116	db_get table $db, undef, $key, $data, 0, sub {
		117	$cb->($! ? () : length $data);
		118	};
		119	}
		120
		121	sub get($$$) {
		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($$$$) {
		131	my ($db, $key, $data, $cb) = @_;
		132
		133	db_put table $db, undef, $key, $data, 0, sub {
		134	$cb->($!);
		135	$SYNC->again unless $SYNC->is_active;
		136	};
		137	}
		138
		139	sub do_table {
		140	my ($db, $cb) = @_;
		141
		142	$db = table $db;
		143
		144	my $cursor = $db->cursor;
		145	my %kv;
		146
		147	for (;;) {
		148	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		149	last if $!;
		150	$kv{$k} = $v;
		151	}
		152
		153	$cb->(\%kv);
		154	}
		155
		156	sub do_get_tile_id {
		157	my ($name, $cb) = @_;
		158
		159	my $table = table "facemap";
		160	my $id;
		161
		162	db_get $table, undef, $name => $id, 0;
		163	$! or return $cb->($id);
		164
		165	unless ($TILE_SEQ) {
		166	$TILE_SEQ = $table->sequence;
		167	$TILE_SEQ->initial_value (FIRST_TILE_ID);
		168	$TILE_SEQ->set_cachesize (0);
		169	db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
		170	}
		171
		172	db_sequence_get $TILE_SEQ, undef, 1, my $id;
		173
		174	die "unable to allocate tile id: $!"
		175	if $!;
		176
		177	db_put $table, undef, $name => $id, 0;
		178	$cb->($id);
		179
		180	}
		181
		182	sub get_tile_id_sync($) {
		183	my ($name) = @_;
		184
		185	$facemap->{$name} \|\|= do {
		186	my $id;
		187	do_get_tile_id $name, sub {
		188	$id = $_[0];
		189	};
		190	BDB::flush;
		191	$id
		192	}
		193	}
		194
		195	#############################################################################
28		196
29	sub path_of_res($) {	197	sub path_of_res($) {
30	utf8::downgrade $_[0]; # bug in unpack "H*"	198	utf8::downgrade $_[0]; # bug in unpack "H*"
31	"$DB_HOME/res-data-" . unpack "H*", $_[0]	199	"$DB_HOME/res-data-" . unpack "H*", $_[0]
32	}	200	}
33		201
34	sub sync {	202	sub sync {
35	# for debugging	203	# for debugging
36	#CFPlus::DB::Server::req (sync => sub { });	204	#DC::DB::Server::req (sync => sub { });
37	CFPlus::DB::Server::sync ();	205	DC::DB::Server::sync ();
38	}
39
40	sub exists($$$) {
41	CFPlus::DB::Server::req (exists => @_);
42	}
43
44	sub get($$$) {
45	CFPlus::DB::Server::req (get => @_);
46	}
47
48	sub put($$$$) {
49	CFPlus::DB::Server::req (put => @_);
50	}	206	}
51		207
52	sub unlink($$) {	208	sub unlink($$) {
53	CFPlus::DB::Server::req (unlink => @_);	209	DC::DB::Server::req (unlink => @_);
		210	}
		211
		212	sub read_file($$) {
		213	DC::DB::Server::req (read_file => @_);
54	}	214	}
55		215
56	sub write_file($$$) {	216	sub write_file($$$) {
57	CFPlus::DB::Server::req (write_file => @_);	217	DC::DB::Server::req (write_file => @_);
58	}	218	}
59		219
60	sub prefetch_file($$$) {	220	sub prefetch_file($$$) {
61	CFPlus::DB::Server::req (prefetch_file => @_);	221	DC::DB::Server::req (prefetch_file => @_);
62	}	222	}
63		223
64	our $tilemap;	224	sub logprint($$$) {
65		225	DC::DB::Server::req (logprint => @_);
66	sub get_tile_id_sync($) {
67	my ($hash) = @_;
68
69	# fetch the full face table first
70	unless ($tilemap) {
71	CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });
72	sync;
73	}
74
75	$tilemap->{$hash} \|\|= do {
76	my $id;
77	CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] });
78	sync;
79	$id
80	}
81	}	226	}
82		227
		228	#############################################################################
		229
83	package CFPlus::DB::Server;	230	package DC::DB::Server;
84		231
85	use strict;	232	use strict;
86		233
		234	use EV ();
87	use Fcntl;	235	use Fcntl;
88	use BerkeleyDB;
89
90	our $DB_ENV;
91	our $DB_STATE;
92	our %DB_TABLE;
93
94	sub open_db {
95	mkdir $DB_HOME, 0777;
96	my $recover = $BerkeleyDB::db_version >= 4.4
97	? eval "DB_REGISTER \| DB_RECOVER"
98	: 0;
99
100	$DB_ENV = new BerkeleyDB::Env
101	-Home => $DB_HOME,
102	-Cachesize => 8_000_000,
103	-ErrFile => "$DB_HOME/errorlog.txt",
104	# -ErrPrefix => "DATABASE",
105	-Verbose => 1,
106	-Flags => DB_CREATE \| DB_RECOVER \| DB_INIT_MPOOL \| DB_INIT_LOCK \| DB_INIT_TXN \| $recover,
107	-SetFlags => DB_AUTO_COMMIT \| DB_LOG_AUTOREMOVE,
108	or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
109
110	1
111	}
112
113	sub table($) {
114	$DB_TABLE{$_[0]} \|\|= do {
115	my ($table) = @_;
116
117	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
118
119	new BerkeleyDB::Btree
120	-Env => $DB_ENV,
121	-Filename => $table,
122	# -Filename => "database",
123	# -Subname => $table,
124	-Property => DB_CHKSUM,
125	-Flags => DB_CREATE \| DB_UPGRADE,
126	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
127	}
128	}
129
130	our $SYNC_INTERVAL = 60;
131		236
132	our %CB;	237	our %CB;
133	our $FH;	238	our $FH;
134	our $ID = "aaa0";	239	our $ID = "aaa0";
135	our ($fh_r_watcher, $fh_w_watcher);	240	our ($fh_r_watcher, $fh_w_watcher);
140	sub fh_write {	245	sub fh_write {
141	my $len = syswrite $FH, $write_buf;	246	my $len = syswrite $FH, $write_buf;
142		247
143	substr $write_buf, 0, $len, "";	248	substr $write_buf, 0, $len, "";
144		249
145	undef $fh_w_watcher	250	$fh_w_watcher->stop
146	unless length $write_buf;	251	unless length $write_buf;
147	}	252	}
148		253
149	sub fh_read {	254	sub fh_read {
150	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	255	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
186		291
187	my $id = ++$ID;	292	my $id = ++$ID;
188	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	293	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
189	$CB{$id} = $cb;	294	$CB{$id} = $cb;
190		295
191	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	296	$fh_w_watcher->start;
192	}
193
194	sub sync_tick {
195	req "sync", sub { };
196	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
197	}
198
199	sub do_sync {
200	$DB_ENV->txn_checkpoint (0, 0, 0);
201	()
202	}
203
204	sub do_exists {
205	my ($db, $key) = @_;
206
207	utf8::downgrade $key;
208	my $data;
209	(table $db)->db_get ($key, $data) == 0
210	? length $data
211	: ()
212	}
213
214	sub do_get {
215	my ($db, $key) = @_;
216
217	utf8::downgrade $key;
218	my $data;
219	(table $db)->db_get ($key, $data) == 0
220	? $data
221	: ()
222	}
223
224	sub do_put {
225	my ($db, $key, $data) = @_;
226
227	utf8::downgrade $key;
228	utf8::downgrade $data;
229	(table $db)->db_put ($key => $data)
230	}
231
232	sub do_table {
233	my ($db) = @_;
234
235	$db = table $db;
236
237	my $cursor = $db->db_cursor;
238	my %kv;
239	my ($k, $v);
240	$kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
241
242	\%kv
243	}
244
245	sub do_get_tile_id {
246	my ($hash) = @_;
247
248	my $id;
249	my $table = table "facemap";
250
251	return $id
252	if $table->db_get ($hash, $id) == 0;
253
254	for (1..100) {
255	my $txn = $DB_ENV->txn_begin;
256	my $status = $table->db_get (id => $id);
257	if ($status == 0 \|\| $status == BerkeleyDB::DB_NOTFOUND) {
258	$id = ($id \|\| 64) + 1;
259	if ($table->db_put (id => $id) == 0
260	&& $table->db_put ($hash => $id) == 0) {
261	$txn->txn_commit;
262
263	return $id;
264	}
265	}
266	$txn->txn_abort;
267	}
268
269	die "maximum number of transaction retries reached - database problems?";
270	}	297	}
271		298
272	sub do_unlink {	299	sub do_unlink {
273	unlink $_[0];	300	unlink $_[0];
274	}	301	}
275		302
		303	sub do_read_file {
		304	my ($path) = @_;
		305
		306	utf8::downgrade $path;
		307	open my $fh, "<:raw", $path
		308	or return;
		309	sysread $fh, my $buf, -s $fh;
		310
		311	$buf
		312	}
		313
276	sub do_write_file {	314	sub do_write_file {
277	my ($file, $data) = @_;	315	my ($path, $data) = @_;
278		316
279	utf8::downgrade $file;	317	utf8::downgrade $path;
280	utf8::downgrade $data;	318	utf8::downgrade $data;
281	open my $fh, ">:raw", $file	319	open my $fh, ">:raw", $path
282	or return;	320	or return;
283	print $fh $data;	321	syswrite $fh, $data;
284	close $fh;	322	close $fh;
285		323
286	1	324	1
287	}	325	}
288		326
289	sub do_prefetch_file {	327	sub do_prefetch_file {
290	my ($file, $size) = @_;	328	my ($path, $size) = @_;
291		329
292	utf8::downgrade $file;	330	utf8::downgrade $path;
293	open my $fh, "<:raw", $file	331	open my $fh, "<:raw", $path
294	or return;	332	or return;
295	sysread $fh, my $buf, $size;	333	sysread $fh, my $buf, $size;
296		334
297	1	335	1
298	}	336	}
299		337
		338	our %LOG_FH;
		339
		340	sub do_logprint {
		341	my ($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
		349	$fh
		350	};
		351
		352	my ($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 $line\n"
		358	}
		359
300	sub run {	360	sub run {
301	($FH, my $fh) = CFPlus::socketpipe;	361	($FH, my $fh) = AnyEvent::Util::portable_socketpair
		362	or die "unable to create database socketpair: $!";
302		363
303	my $oldfh = select $FH; $\| = 1; select $oldfh;	364	my $oldfh = select $FH; $\| = 1; select $oldfh;
304	my $oldfh = select $fh; $\| = 1; select $oldfh;	365	my $oldfh = select $fh; $\| = 1; select $oldfh;
305		366
306	my $pid = fork;	367	my $pid = fork;
307		368
308	if (defined $pid && !$pid) {	369	if (defined $pid && !$pid) {
		370	local $SIG{QUIT} = "IGNORE";
309	local $SIG{__DIE__};	371	local $SIG{__DIE__};
		372	local $SIG{__WARN__};
310	eval {	373	eval {
311	close $FH;	374	close $FH;
312
313	unless (eval { open_db }) {
314	eval { File::Path::rmtree $DB_HOME };
315	open_db;
316	}
317		375
318	while () {	376	while () {
319	4 == read $fh, my $len, 4	377	4 == read $fh, my $len, 4
320	or last;	378	or last;
321	$len = unpack "N", $len;	379	$len = unpack "N", $len;
…		…
323	or die "unexpected eof while reading request";	381	or die "unexpected eof while reading request";
324		382
325	$req = Storable::thaw $req;	383	$req = Storable::thaw $req;
326		384
327	my ($id, $type, @args) = @$req;	385	my ($id, $type, @args) = @$req;
328	my $cb = CFPlus::DB::Server->can ("do_$type")	386	my $cb = DC::DB::Server->can ("do_$type")
329	or die "$type: unknown database request type\n";	387	or die "$type: unknown database request type\n";
330	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	388	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
331	(syswrite $fh, $res) == length $res	389	(syswrite $fh, $res) == length $res
332	or die;	390	or die "DB::write: $!";
333	}	391	}
334	};	392	};
335		393
336	my $error = $@;	394	my $error = $@;
337		395
338	eval {	396	eval {
339	undef %DB_TABLE;
340	undef $DB_ENV;
341
342	Storable::store_fd [die => $error], $fh;	397	Storable::store_fd [die => $error], $fh;
343	};	398	};
344		399
		400	warn $error
		401	if $error;
		402
345	CFPlus::_exit 0;	403	DC::_exit 0;
346	}	404	}
347		405
348	close $fh;	406	close $fh;
349	CFPlus::fh_nonblocking $FH, 1;	407	DC::fh_nonblocking $FH, 1;
350		408
351	$CB{die} = sub { die shift };	409	$CB{die} = sub { die shift };
352		410
353	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	411	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
354		412	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
355	sync_tick;
356	}	413	}
357		414
358	sub stop {	415	sub stop {
359	close $FH;	416	close $FH;
360	}	417	}
361		418
		419	package DC::DB;
		420
		421	sub nuke_db {
		422	File::Path::mkpath [$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;
		460	}
		461
362	1;	462	1;
363		463
364	=back	464	=back
365		465
366	=head1 AUTHOR	466	=head1 AUTHOR

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+Changed lines

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents): Revision 1.12 by root, Tue Jul 24 04:54:47 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 1.12 by root, Tue Jul 24 04:54:47 2007 UTC vs.
Revision 1.42 by root, Sun Jan 4 10:22:19 2009 UTC