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

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.6 by root, Mon Apr 16 21:06:37 2007 UTC vs.
Revision 1.41 by root, Wed Dec 24 04:09:27 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 File::Path ();
20	use Carp ();	21	use Carp ();
21	use AnyEvent ();
22	use Storable ();	22	use Storable ();
		23	use Config;
		24	use BDB;
23		25
24	use CFPlus;	26	use DC;
25		27
26	sub sync {	28	our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
27	# for debugging	29	our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
28	#CFPlus::DB::Server::req (sync => sub { });	30	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
29	CFPlus::DB::Server::sync ();
30	}
31		31
32	sub get($$$) {	32	sub FIRST_TILE_ID () { 64 }
33	CFPlus::DB::Server::req (get => @_);
34	}
35		33
36	sub put($$$$) {	34	unless (-d $DB_HOME) {
37	CFPlus::DB::Server::req (put => @_);	35	if (-d "$Deliantra::VARDIR/$ODBDIR") {
38	}	36	rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
39		37	print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
40	our $tilemap;	38	} elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
41		39	rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
42	sub get_tile_id_sync($) {	40	print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
43	my ($hash) = @_;	41	} else {
44		42	File::Path::mkpath [$DB_HOME]
45	# fetch the full face table first	43	or die "unable to create database directory $DB_HOME: $!";
46	unless ($tilemap) {
47	CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });
48	sync;
49	}	44	}
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	}	45	}
58		46
59	package CFPlus::DB::Server;	47	BDB::max_poll_time 0.03;
		48	BDB::max_parallel 1;
60		49
61	use strict;
62
63	use Fcntl;
64	use BerkeleyDB;
65
66	our $DB_HOME = "$Crossfire::VARDIR/cfplus";
67	our $DB_ENV;	50	our $DB_ENV;
68	our $DB_STATE;	51	our $DB_STATE;
69	our %DB_TABLE;	52	our %DB_TABLE;
		53	our $TILE_SEQ;
70		54
71	sub open_db {	55	sub try_open_db {
72	mkdir $DB_HOME, 0777;	56	File::Path::mkpath [$DB_HOME];
73	my $recover = $BerkeleyDB::db_version >= 4.4	57
74	? eval "DB_REGISTER \| DB_RECOVER"	58	my $env = db_env_create;
		59
		60	$env->set_errfile (\*STDERR);
		61	$env->set_msgfile (\*STDERR);
		62	$env->set_verbose (-1, 1);
		63
		64	$env->set_flags (BDB::AUTO_COMMIT \| BDB::REGION_INIT);
		65	$env->set_flags (&BDB::LOG_AUTOREMOVE ) if BDB::VERSION v0, v4.7;
		66	$env->log_set_config (&BDB::LOG_AUTO_REMOVE) if BDB::VERSION v4.7;
		67
		68	$env->set_timeout (3, BDB::SET_TXN_TIMEOUT);
		69	$env->set_timeout (3, BDB::SET_LOCK_TIMEOUT);
		70
		71	$env->set_cachesize (0, 2048 * 1024, 0);
		72
		73	db_env_open $env, $DB_HOME,
		74	BDB::CREATE \| BDB::REGISTER \| BDB::RECOVER \| BDB::INIT_MPOOL \| BDB::INIT_LOCK \| BDB::INIT_TXN,
75	: 0;	75	0666;
76		76
77	$DB_ENV = new BerkeleyDB::Env	77	$! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
78	-Home => $DB_HOME,	78
79	-Cachesize => 8_000_000,	79	$DB_ENV = $env;
80	-ErrFile => "$DB_HOME/errorlog.txt",
81	# -ErrPrefix => "DATABASE",
82	-Verbose => 1,
83	-Flags => DB_CREATE \| DB_RECOVER \| DB_INIT_MPOOL \| DB_INIT_LOCK \| DB_INIT_TXN \| $recover,
84	-SetFlags => DB_AUTO_COMMIT \| DB_LOG_AUTOREMOVE,
85	or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
86		80
87	1	81	1
88	}	82	}
89		83
90	sub table($) {	84	sub table($) {
91	$DB_TABLE{$_[0]} \|\|= do {	85	$DB_TABLE{$_[0]} \|\|= do {
92	my ($table) = @_;	86	my ($table) = @_;
93		87
94	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;	88	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
95		89
96	new BerkeleyDB::Btree	90	$DB_ENV#d#
97	-Env => $DB_ENV,	91	or return ::clienterror ("trying to create table $_[0] with empty db_env $DB_ENV" => 1);#d#
98	-Filename => $table,	92
99	# -Filename => "database",	93	my $db = db_create $DB_ENV;
100	# -Subname => $table,	94	$db->set_flags (BDB::CHKSUM);
101	-Property => DB_CHKSUM,	95
102	-Flags => DB_CREATE \| DB_UPGRADE,	96	db_open $db, undef, $table, undef, BDB::BTREE,
103	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"	97	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
		98
		99	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
		100
		101	$db
		102	}
		103	}
		104
		105	#############################################################################
		106
		107	our $WATCHER;
		108	our $SYNC;
		109	our $facemap;
		110
		111	sub exists($$$) {
		112	my ($db, $key, $cb) = @_;
		113
		114	my $data;
		115	db_get table $db, undef, $key, $data, 0, sub {
		116	$cb->($! ? () : length $data);
104	}	117	};
105	}	118	}
106		119
107	our $SYNC_INTERVAL = 60;	120	sub get($$$) {
		121	my ($db, $key, $cb) = @_;
		122
		123	my $data;
		124	db_get table $db, undef, $key, $data, 0, sub {
		125	$cb->($! ? () : $data);
		126	};
		127	}
		128
		129	sub put($$$$) {
		130	my ($db, $key, $data, $cb) = @_;
		131
		132	db_put table $db, undef, $key, $data, 0, sub {
		133	$cb->($!);
		134	$SYNC->again unless $SYNC->is_active;
		135	};
		136	}
		137
		138	sub do_table {
		139	my ($db, $cb) = @_;
		140
		141	$db = table $db;
		142
		143	my $cursor = $db->cursor;
		144	my %kv;
		145
		146	for (;;) {
		147	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		148	last if $!;
		149	$kv{$k} = $v;
		150	}
		151
		152	$cb->(\%kv);
		153	}
		154
		155	sub do_get_tile_id {
		156	my ($name, $cb) = @_;
		157
		158	my $table = table "facemap";
		159	my $id;
		160
		161	db_get $table, undef, $name => $id, 0;
		162	$! or return $cb->($id);
		163
		164	unless ($TILE_SEQ) {
		165	$TILE_SEQ = $table->sequence;
		166	$TILE_SEQ->initial_value (FIRST_TILE_ID);
		167	$TILE_SEQ->set_cachesize (0);
		168	db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
		169	}
		170
		171	db_sequence_get $TILE_SEQ, undef, 1, my $id;
		172
		173	die "unable to allocate tile id: $!"
		174	if $!;
		175
		176	db_put $table, undef, $name => $id, 0;
		177	$cb->($id);
		178
		179	}
		180
		181	sub get_tile_id_sync($) {
		182	my ($name) = @_;
		183
		184	$facemap->{$name} \|\|= do {
		185	my $id;
		186	do_get_tile_id $name, sub {
		187	$id = $_[0];
		188	};
		189	BDB::flush;
		190	$id
		191	}
		192	}
		193
		194	#############################################################################
		195
		196	sub path_of_res($) {
		197	utf8::downgrade $_[0]; # bug in unpack "H*"
		198	"$DB_HOME/res-data-" . unpack "H*", $_[0]
		199	}
		200
		201	sub sync {
		202	# for debugging
		203	#DC::DB::Server::req (sync => sub { });
		204	DC::DB::Server::sync ();
		205	}
		206
		207	sub unlink($$) {
		208	DC::DB::Server::req (unlink => @_);
		209	}
		210
		211	sub read_file($$) {
		212	DC::DB::Server::req (read_file => @_);
		213	}
		214
		215	sub write_file($$$) {
		216	DC::DB::Server::req (write_file => @_);
		217	}
		218
		219	sub prefetch_file($$$) {
		220	DC::DB::Server::req (prefetch_file => @_);
		221	}
		222
		223	sub logprint($$$) {
		224	DC::DB::Server::req (logprint => @_);
		225	}
		226
		227	#############################################################################
		228
		229	package DC::DB::Server;
		230
		231	use strict;
		232
		233	use EV ();
		234	use Fcntl;
108		235
109	our %CB;	236	our %CB;
110	our $FH;	237	our $FH;
111	our $ID = "aaa0";	238	our $ID = "aaa0";
112	our ($fh_r_watcher, $fh_w_watcher);	239	our ($fh_r_watcher, $fh_w_watcher);
117	sub fh_write {	244	sub fh_write {
118	my $len = syswrite $FH, $write_buf;	245	my $len = syswrite $FH, $write_buf;
119		246
120	substr $write_buf, 0, $len, "";	247	substr $write_buf, 0, $len, "";
121		248
122	undef $fh_w_watcher	249	$fh_w_watcher->stop
123	unless length $write_buf;	250	unless length $write_buf;
124	}	251	}
125		252
126	sub fh_read {	253	sub fh_read {
127	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	254	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
163		290
164	my $id = ++$ID;	291	my $id = ++$ID;
165	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	292	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
166	$CB{$id} = $cb;	293	$CB{$id} = $cb;
167		294
168	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	295	$fh_w_watcher->start;
169	}	296	}
170		297
171	sub sync_tick {	298	sub do_unlink {
172	req "sync", sub { };	299	unlink $_[0];
173	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
174	}	300	}
175		301
176	sub do_sync {	302	sub do_read_file {
177	$DB_ENV->txn_checkpoint (0, 0, 0);	303	my ($path) = @_;
178	()
179	}
180		304
181	sub do_get {
182	my ($db, $key) = @_;
183
184	utf8::downgrade $key;	305	utf8::downgrade $path;
185	my $data;	306	open my $fh, "<:raw", $path
186	(table $db)->db_get ($key, $data) == 0	307	or return;
187	? $data	308	sysread $fh, my $buf, -s $fh;
188	: ()
189	}
190		309
191	sub do_put {	310	$buf
		311	}
		312
		313	sub do_write_file {
192	my ($db, $key, $data) = @_;	314	my ($path, $data) = @_;
193		315
194	utf8::downgrade $key;	316	utf8::downgrade $path;
195	utf8::downgrade $data;	317	utf8::downgrade $data;
196	(table $db)->db_put ($key => $data)	318	open my $fh, ">:raw", $path
197	}	319	or return;
		320	syswrite $fh, $data;
		321	close $fh;
198		322
199	sub do_table {	323	1
200	my ($db) = @_;
201
202	$db = table $db;
203
204	my $cursor = $db->db_cursor;
205	my %kv;
206	my ($k, $v);
207	$kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
208
209	\%kv
210	}	324	}
211		325
212	sub do_get_tile_id {	326	sub do_prefetch_file {
213	my ($hash) = @_;	327	my ($path, $size) = @_;
214		328
215	my $id;	329	utf8::downgrade $path;
216	my $table = table "facemap";	330	open my $fh, "<:raw", $path
		331	or return;
		332	sysread $fh, my $buf, $size;
217		333
218	return $id	334	1
219	if $table->db_get ($hash, $id) == 0;	335	}
220		336
221	for (1..100) {	337	our %LOG_FH;
222	my $txn = $DB_ENV->txn_begin;
223	my $status = $table->db_get (id => $id);
224	if ($status == 0 \|\| $status == BerkeleyDB::DB_NOTFOUND) {
225	$id = ($id \|\| 64) + 1;
226	if ($table->db_put (id => $id) == 0
227	&& $table->db_put ($hash => $id) == 0) {
228	$txn->txn_commit;
229		338
230	return $id;	339	sub do_logprint {
231	}	340	my ($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
232	}	348	$fh
233	$txn->txn_abort;
234	}	349	};
235		350
236	die "maximum number of transaction retries reached - database problems?";	351	my ($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 $line\n"
237	}	357	}
238		358
239	sub run {	359	sub run {
240	($FH, my $fh) = CFPlus::socketpipe;	360	($FH, my $fh) = DC::socketpipe;
241		361
242	my $oldfh = select $FH; $\| = 1; select $oldfh;	362	my $oldfh = select $FH; $\| = 1; select $oldfh;
243	my $oldfh = select $fh; $\| = 1; select $oldfh;	363	my $oldfh = select $fh; $\| = 1; select $oldfh;
244		364
245	my $pid = fork;	365	my $pid = fork;
246		366
247	if (defined $pid && !$pid) {	367	if (defined $pid && !$pid) {
		368	local $SIG{QUIT} = "IGNORE";
248	local $SIG{__DIE__};	369	local $SIG{__DIE__};
		370	local $SIG{__WARN__};
249	eval {	371	eval {
250	close $FH;	372	close $FH;
251
252	unless (eval { open_db }) {
253	eval { File::Path::rmtree $DB_HOME };
254	open_db;
255	}
256		373
257	while () {	374	while () {
258	4 == read $fh, my $len, 4	375	4 == read $fh, my $len, 4
259	or last;	376	or last;
260	$len = unpack "N", $len;	377	$len = unpack "N", $len;
…		…
262	or die "unexpected eof while reading request";	379	or die "unexpected eof while reading request";
263		380
264	$req = Storable::thaw $req;	381	$req = Storable::thaw $req;
265		382
266	my ($id, $type, @args) = @$req;	383	my ($id, $type, @args) = @$req;
267	my $cb = CFPlus::DB::Server->can ("do_$type")	384	my $cb = DC::DB::Server->can ("do_$type")
268	or die "$type: unknown database request type\n";	385	or die "$type: unknown database request type\n";
269	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	386	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
270	(syswrite $fh, $res) == length $res	387	(syswrite $fh, $res) == length $res
271	or die;	388	or die "DB::write: $!";
272	}	389	}
273	};	390	};
274		391
275	my $error = $@;	392	my $error = $@;
276		393
277	eval {	394	eval {
278	undef %DB_TABLE;
279	undef $DB_ENV;
280
281	Storable::store_fd [die => $error], $fh;	395	Storable::store_fd [die => $error], $fh;
282	};	396	};
283		397
		398	warn $error
		399	if $error;
		400
284	CFPlus::_exit 0;	401	DC::_exit 0;
285	}	402	}
286		403
287	close $fh;	404	close $fh;
288	CFPlus::fh_nonblocking $FH, 1;	405	DC::fh_nonblocking $FH, 1;
289		406
290	$CB{die} = sub { die shift };	407	$CB{die} = sub { die shift };
291		408
292	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	409	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
293		410	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
294	sync_tick;
295	}	411	}
296		412
297	sub stop {	413	sub stop {
298	close $FH;	414	close $FH;
299	}	415	}
300		416
		417	package DC::DB;
		418
		419	sub nuke_db {
		420	File::Path::mkpath [$DB_HOME];
		421	eval { File::Path::rmtree $DB_HOME };
		422	}
		423
		424	sub open_db {
		425	unless (eval { try_open_db }) {
		426	warn "$@";#d#
		427	eval { nuke_db };
		428	try_open_db;
		429	}
		430
		431	# fetch the full face table first
		432	unless ($facemap) {
		433	do_table facemap => sub {
		434	$facemap = $_[0];
		435	delete $facemap->{id};
		436	my %maptile = reverse %$facemap;#d#
		437	if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
		438	$facemap = { };#d#
		439	DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		440	}#d#
		441	};
		442	}
		443
		444	$WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		445	$SYNC = EV::timer_ns 0, 60, sub {
		446	$_[0]->stop;
		447	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		448	};
		449	}
		450
		451	END {
		452	db_env_txn_checkpoint $DB_ENV, 0, 0, 0
		453	if $DB_ENV;
		454
		455	undef $TILE_SEQ;
		456	%DB_TABLE = ();
		457	undef $DB_ENV;
		458	}
		459
301	1;	460	1;
302		461
303	=back	462	=back
304		463
305	=head1 AUTHOR	464	=head1 AUTHOR

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents): Revision 1.6 by root, Mon Apr 16 21:06:37 2007 UTC vs. Revision 1.41 by root, Wed Dec 24 04:09:27 2008 UTC

Diff Legend

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.6 by root, Mon Apr 16 21:06:37 2007 UTC vs.
Revision 1.41 by root, Wed Dec 24 04:09:27 2008 UTC