[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 1.38 by root, Fri Jul 18 22:40:51 2008 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 Config;	23	use Config;
		24	use BDB;
24		25
25	use CFPlus;	26	use DC;
26		27
27	our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}";	28	our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
		29	our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
		30	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
		31
		32	unless (-d $DB_HOME) {
		33	if (-d "$Deliantra::VARDIR/$ODBDIR") {
		34	rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
		35	print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
		36	} elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
		37	rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
		38	print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
		39	} else {
		40	File::Path::mkpath [$DB_HOME]
		41	or die "unable to create database directory $DB_HOME: $!";
		42	}
		43	}
		44
		45	BDB::max_poll_time 0.03;
		46	BDB::max_parallel 1;
		47
		48	our $DB_ENV;
		49	our $DB_STATE;
		50	our %DB_TABLE;
		51	our $TILE_SEQ;
		52
		53	sub try_open_db {
		54	File::Path::mkpath [$DB_HOME];
		55
		56	my $env = db_env_create;
		57
		58	$env->set_errfile (\*STDERR);
		59	$env->set_msgfile (\*STDERR);
		60	$env->set_verbose (-1, 1);
		61
		62	$env->set_flags (BDB::AUTO_COMMIT \| BDB::LOG_AUTOREMOVE \| BDB::TXN_WRITE_NOSYNC);
		63	$env->set_cachesize (0, 2048 * 1024, 0);
		64
		65	db_env_open $env, $DB_HOME,
		66	BDB::CREATE \| BDB::REGISTER \| BDB::RECOVER \| BDB::INIT_MPOOL \| BDB::INIT_LOCK \| BDB::INIT_TXN,
		67	0666;
		68
		69	$! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
		70
		71	$DB_ENV = $env;
		72
		73	1
		74	}
		75
		76	sub table($) {
		77	$DB_TABLE{$_[0]} \|\|= do {
		78	my ($table) = @_;
		79
		80	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
		81
		82	my $db = db_create $DB_ENV;
		83	$db->set_flags (BDB::CHKSUM);
		84
		85	db_open $db, undef, $table, undef, BDB::BTREE,
		86	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
		87
		88	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
		89
		90	$db
		91	}
		92	}
		93
		94	#############################################################################
		95
		96	our $WATCHER;
		97	our $SYNC;
		98	our $facemap;
		99
		100	sub exists($$$) {
		101	my ($db, $key, $cb) = @_;
		102
		103	my $data;
		104	db_get table $db, undef, $key, $data, 0, sub {
		105	$cb->($! ? () : length $data);
		106	};
		107	}
		108
		109	sub get($$$) {
		110	my ($db, $key, $cb) = @_;
		111
		112	my $data;
		113	db_get table $db, undef, $key, $data, 0, sub {
		114	$cb->($! ? () : $data);
		115	};
		116	}
		117
		118	sub put($$$$) {
		119	my ($db, $key, $data, $cb) = @_;
		120
		121	db_put table $db, undef, $key, $data, 0, sub {
		122	$cb->($!);
		123	$SYNC->again unless $SYNC->is_active;
		124	};
		125	}
		126
		127	sub do_table {
		128	my ($db, $cb) = @_;
		129
		130	$db = table $db;
		131
		132	my $cursor = $db->cursor;
		133	my %kv;
		134
		135	for (;;) {
		136	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		137	last if $!;
		138	$kv{$k} = $v;
		139	}
		140
		141	$cb->(\%kv);
		142	}
		143
		144	sub do_get_tile_id {
		145	my ($name, $cb) = @_;
		146
		147	my $table = table "facemap";
		148	my $id;
		149
		150	db_get $table, undef, $name => $id, 0;
		151	$! or return $cb->($id);
		152
		153	unless ($TILE_SEQ) {
		154	$TILE_SEQ = $table->sequence;
		155	$TILE_SEQ->initial_value (64);
		156	$TILE_SEQ->set_cachesize (0);
		157	db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
		158	}
		159
		160	db_sequence_get $TILE_SEQ, undef, 1, my $id;
		161
		162	die "unable to allocate tile id: $!"
		163	if $!;
		164
		165	db_put $table, undef, $name => $id, 0;
		166	$cb->($id);
		167
		168	}
		169
		170	sub get_tile_id_sync($) {
		171	my ($name) = @_;
		172
		173	$facemap->{$name} \|\|= do {
		174	my $id;
		175	do_get_tile_id $name, sub {
		176	$id = $_[0];
		177	};
		178	BDB::flush;
		179	$id
		180	}
		181	}
		182
		183	#############################################################################
28		184
29	sub path_of_res($) {	185	sub path_of_res($) {
30	utf8::downgrade $_[0]; # bug in unpack "H*"	186	utf8::downgrade $_[0]; # bug in unpack "H*"
31	"$DB_HOME/res-data-" . unpack "H*", $_[0]	187	"$DB_HOME/res-data-" . unpack "H*", $_[0]
32	}	188	}
33		189
34	sub sync {	190	sub sync {
35	# for debugging	191	# for debugging
36	#CFPlus::DB::Server::req (sync => sub { });	192	#DC::DB::Server::req (sync => sub { });
37	CFPlus::DB::Server::sync ();	193	DC::DB::Server::sync ();
38	}
39
40	sub exists($$$) {
41	CFPlus::DB::Server::req (exists => @_);
42	}
43
44	sub get($$$) {
45	CFPlus::DB::Server::req (get => @_);
46	}
47
48	sub put($$$$) {
49	CFPlus::DB::Server::req (put => @_);
50	}	194	}
51		195
52	sub unlink($$) {	196	sub unlink($$) {
53	CFPlus::DB::Server::req (unlink => @_);	197	DC::DB::Server::req (unlink => @_);
		198	}
		199
		200	sub read_file($$) {
		201	DC::DB::Server::req (read_file => @_);
54	}	202	}
55		203
56	sub write_file($$$) {	204	sub write_file($$$) {
57	CFPlus::DB::Server::req (write_file => @_);	205	DC::DB::Server::req (write_file => @_);
58	}	206	}
59		207
60	sub prefetch_file($$$) {	208	sub prefetch_file($$$) {
61	CFPlus::DB::Server::req (prefetch_file => @_);	209	DC::DB::Server::req (prefetch_file => @_);
62	}	210	}
63		211
64	our $tilemap;	212	sub logprint($$$) {
65		213	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	}	214	}
82		215
		216	#############################################################################
		217
83	package CFPlus::DB::Server;	218	package DC::DB::Server;
84		219
85	use strict;	220	use strict;
86		221
		222	use EV ();
87	use Fcntl;	223	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		224
132	our %CB;	225	our %CB;
133	our $FH;	226	our $FH;
134	our $ID = "aaa0";	227	our $ID = "aaa0";
135	our ($fh_r_watcher, $fh_w_watcher);	228	our ($fh_r_watcher, $fh_w_watcher);
140	sub fh_write {	233	sub fh_write {
141	my $len = syswrite $FH, $write_buf;	234	my $len = syswrite $FH, $write_buf;
142		235
143	substr $write_buf, 0, $len, "";	236	substr $write_buf, 0, $len, "";
144		237
145	undef $fh_w_watcher	238	$fh_w_watcher->stop
146	unless length $write_buf;	239	unless length $write_buf;
147	}	240	}
148		241
149	sub fh_read {	242	sub fh_read {
150	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	243	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
186		279
187	my $id = ++$ID;	280	my $id = ++$ID;
188	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	281	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
189	$CB{$id} = $cb;	282	$CB{$id} = $cb;
190		283
191	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	284	$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	}	285	}
271		286
272	sub do_unlink {	287	sub do_unlink {
273	unlink $_[0];	288	unlink $_[0];
274	}	289	}
275		290
		291	sub do_read_file {
		292	my ($path) = @_;
		293
		294	utf8::downgrade $path;
		295	open my $fh, "<:raw", $path
		296	or return;
		297	sysread $fh, my $buf, -s $fh;
		298
		299	$buf
		300	}
		301
276	sub do_write_file {	302	sub do_write_file {
277	my ($file, $data) = @_;	303	my ($path, $data) = @_;
278		304
279	utf8::downgrade $file;	305	utf8::downgrade $path;
280	utf8::downgrade $data;	306	utf8::downgrade $data;
281	open my $fh, ">:raw", $file	307	open my $fh, ">:raw", $path
282	or return;	308	or return;
283	print $fh $data;	309	syswrite $fh, $data;
284	close $fh;	310	close $fh;
285		311
286	1	312	1
287	}	313	}
288		314
289	sub do_prefetch_file {	315	sub do_prefetch_file {
290	my ($file, $size) = @_;	316	my ($path, $size) = @_;
291		317
292	utf8::downgrade $file;	318	utf8::downgrade $path;
293	open my $fh, "<:raw", $file	319	open my $fh, "<:raw", $path
294	or return;	320	or return;
295	sysread $fh, my $buf, $size;	321	sysread $fh, my $buf, $size;
296		322
297	1	323	1
298	}	324	}
299		325
		326	our %LOG_FH;
		327
		328	sub do_logprint {
		329	my ($path, $line) = @_;
		330
		331	$LOG_FH{$path} \|\|= do {
		332	open my $fh, ">>:utf8", $path
		333	or warn "Couldn't open logfile $path: $!";
		334
		335	$fh->autoflush (1);
		336
		337	$fh
		338	};
		339
		340	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		341
		342	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		343	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		344
		345	print { $LOG_FH{$path} } "$ts $line\n"
		346	}
		347
300	sub run {	348	sub run {
301	($FH, my $fh) = CFPlus::socketpipe;	349	($FH, my $fh) = DC::socketpipe;
302		350
303	my $oldfh = select $FH; $\| = 1; select $oldfh;	351	my $oldfh = select $FH; $\| = 1; select $oldfh;
304	my $oldfh = select $fh; $\| = 1; select $oldfh;	352	my $oldfh = select $fh; $\| = 1; select $oldfh;
305		353
306	my $pid = fork;	354	my $pid = fork;
307		355
308	if (defined $pid && !$pid) {	356	if (defined $pid && !$pid) {
		357	local $SIG{QUIT} = "IGNORE";
309	local $SIG{__DIE__};	358	local $SIG{__DIE__};
		359	local $SIG{__WARN__};
310	eval {	360	eval {
311	close $FH;	361	close $FH;
312
313	unless (eval { open_db }) {
314	eval { File::Path::rmtree $DB_HOME };
315	open_db;
316	}
317		362
318	while () {	363	while () {
319	4 == read $fh, my $len, 4	364	4 == read $fh, my $len, 4
320	or last;	365	or last;
321	$len = unpack "N", $len;	366	$len = unpack "N", $len;
…		…
323	or die "unexpected eof while reading request";	368	or die "unexpected eof while reading request";
324		369
325	$req = Storable::thaw $req;	370	$req = Storable::thaw $req;
326		371
327	my ($id, $type, @args) = @$req;	372	my ($id, $type, @args) = @$req;
328	my $cb = CFPlus::DB::Server->can ("do_$type")	373	my $cb = DC::DB::Server->can ("do_$type")
329	or die "$type: unknown database request type\n";	374	or die "$type: unknown database request type\n";
330	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	375	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
331	(syswrite $fh, $res) == length $res	376	(syswrite $fh, $res) == length $res
332	or die;	377	or die "DB::write: $!";
333	}	378	}
334	};	379	};
335		380
336	my $error = $@;	381	my $error = $@;
337		382
338	eval {	383	eval {
339	undef %DB_TABLE;
340	undef $DB_ENV;
341
342	Storable::store_fd [die => $error], $fh;	384	Storable::store_fd [die => $error], $fh;
343	};	385	};
344		386
		387	warn $error
		388	if $error;
		389
345	CFPlus::_exit 0;	390	DC::_exit 0;
346	}	391	}
347		392
348	close $fh;	393	close $fh;
349	CFPlus::fh_nonblocking $FH, 1;	394	DC::fh_nonblocking $FH, 1;
350		395
351	$CB{die} = sub { die shift };	396	$CB{die} = sub { die shift };
352		397
353	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	398	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
354		399	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
355	sync_tick;
356	}	400	}
357		401
358	sub stop {	402	sub stop {
359	close $FH;	403	close $FH;
360	}	404	}
361		405
		406	package DC::DB;
		407
		408	sub nuke_db {
		409	File::Path::mkpath [$DB_HOME];
		410	eval { File::Path::rmtree $DB_HOME };
		411	}
		412
		413	sub open_db {
		414	unless (eval { try_open_db }) {
		415	warn "$@";#d#
		416	eval { nuke_db };
		417	try_open_db;
		418	}
		419
		420	# fetch the full face table first
		421	unless ($facemap) {
		422	do_table facemap => sub {
		423	$facemap = $_[0];
		424	delete $facemap->{id};
		425	my %maptile = reverse %$facemap;#d#
		426	if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
		427	$facemap = { };#d#
		428	DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		429	}#d#
		430	};
		431	}
		432
		433	$WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		434	$SYNC = EV::timer_ns 0, 60, sub {
		435	$_[0]->stop;
		436	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		437	};
		438	}
		439
		440	END {
		441	db_env_txn_checkpoint $DB_ENV, 0, 0, 0
		442	if $DB_ENV;
		443
		444	undef $TILE_SEQ;
		445	%DB_TABLE = ();
		446	undef $DB_ENV;
		447	}
		448
362	1;	449	1;
363		450
364	=back	451	=back
365		452
366	=head1 AUTHOR	453	=head1 AUTHOR

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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents): Revision 1.12 by root, Tue Jul 24 04:54:47 2007 UTC vs. Revision 1.38 by root, Fri Jul 18 22:40:51 2008 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 1.38 by root, Fri Jul 18 22:40:51 2008 UTC