[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 1.32 by root, Sat Jan 19 04:49:37 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;
		42	BDB::max_parallel 1;
58		43
59	use strict;
60
61	use Fcntl;
62	use BerkeleyDB;
63
64	our $DB_HOME = "$Crossfire::VARDIR/cfplus";
65	our $DB_ENV;	44	our $DB_ENV;
66	our $DB_STATE;	45	our $DB_STATE;
67	our %DB_TABLE;	46	our %DB_TABLE;
68		47
69	sub open_db {	48	sub open_db {
70	mkdir $DB_HOME, 0777;	49	mkdir $DB_HOME, 0777;
71	my $recover = $BerkeleyDB::db_version >= 4.4	50
72	? eval "DB_REGISTER \| DB_RECOVER"	51	$DB_ENV = db_env_create;
		52
		53	$DB_ENV->set_errfile (\*STDERR);
		54	$DB_ENV->set_msgfile (\*STDERR);
		55	$DB_ENV->set_verbose (-1, 1);
		56
		57	$DB_ENV->set_flags (BDB::AUTO_COMMIT \| BDB::LOG_AUTOREMOVE \| BDB::TXN_WRITE_NOSYNC);
		58	$DB_ENV->set_cachesize (0, 2048 * 1024, 0);
		59
		60	db_env_open $DB_ENV, $DB_HOME,
		61	BDB::CREATE \| BDB::REGISTER \| BDB::RECOVER \| BDB::INIT_MPOOL \| BDB::INIT_LOCK \| BDB::INIT_TXN,
73	: 0;	62	0666;
74		63
75	$DB_ENV = new BerkeleyDB::Env	64	$! 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		65
85	1	66	1
86	}	67	}
87		68
88	sub table($) {	69	sub table($) {
89	$DB_TABLE{$_[0]} \|\|= do {	70	$DB_TABLE{$_[0]} \|\|= do {
90	my ($table) = @_;	71	my ($table) = @_;
91		72
92	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;	73	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
93		74
94	new BerkeleyDB::Btree	75	my $db = db_create $DB_ENV;
95	-Env => $DB_ENV,	76	$db->set_flags (BDB::CHKSUM);
96	-Filename => $table,	77
97	# -Filename => "database",	78	db_open $db, undef, $table, undef, BDB::BTREE,
98	# -Subname => $table,	79	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
99	-Property => DB_CHKSUM,	80
100	-Flags => DB_CREATE \| DB_UPGRADE,	81	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
101	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"	82
		83	$db
		84	}
		85	}
		86
		87	#############################################################################
		88
		89	unless (eval { open_db }) {
		90	warn "$@";#d#
		91	eval { File::Path::rmtree $DB_HOME };
		92	open_db;
		93	}
		94
		95	our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		96
		97	our $SYNC = EV::timer_ns 0, 60, sub {
		98	$_[0]->stop;
		99	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		100	};
		101
		102	our $tilemap;
		103
		104	sub exists($$$) {
		105	my ($db, $key, $cb) = @_;
		106
		107	my $data;
		108	db_get table $db, undef, $key, $data, 0, sub {
		109	$cb->($! ? () : length $data);
102	}	110	};
103	}	111	}
104		112
105	our $SYNC_INTERVAL = 6;	113	sub get($$$) {
		114	my ($db, $key, $cb) = @_;
		115
		116	my $data;
		117	db_get table $db, undef, $key, $data, 0, sub {
		118	$cb->($! ? () : $data);
		119	};
		120	}
		121
		122	sub put($$$$) {
		123	my ($db, $key, $data, $cb) = @_;
		124
		125	db_put table $db, undef, $key, $data, 0, sub {
		126	$cb->($!);
		127	$SYNC->again unless $SYNC->is_active;
		128	};
		129	}
		130
		131	sub do_table {
		132	my ($db, $cb) = @_;
		133
		134	$db = table $db;
		135
		136	my $cursor = $db->cursor;
		137	my %kv;
		138
		139	for (;;) {
		140	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		141	last if $!;
		142	$kv{$k} = $v;
		143	}
		144
		145	$cb->(\%kv);
		146	}
		147
		148	sub do_get_tile_id {
		149	my ($name, $cb) = @_;
		150
		151	my $table = table "facemap";
		152	my $id;
		153
		154	db_get $table, undef, $name, $id, 0;
		155	return $cb->($id) unless $!;
		156
		157	for (1..100) {
		158	my $txn = $DB_ENV->txn_begin;
		159	db_get $table, $txn, id => $id, 0;
		160
		161	$id = 64 if $id < 64;
		162
		163	++$id;
		164
		165	db_put $table, $txn, id => $id, 0;
		166	db_txn_finish $txn;
		167
		168	$SYNC->again unless $SYNC->is_active;
		169
		170	return $cb->($id) unless $!;
		171
		172	select undef, undef, undef, 0.01 * rand;
		173	}
		174
		175	die "maximum number of transaction retries reached - database problems?";
		176	}
		177
		178	sub get_tile_id_sync($) {
		179	my ($name) = @_;
		180
		181	$tilemap->{$name} \|\|= do {
		182	my $id;
		183	do_get_tile_id $name, sub {
		184	$id = $_[0];
		185	};
		186	BDB::flush;
		187	$id
		188	}
		189	}
		190
		191	#############################################################################
		192
		193	sub path_of_res($) {
		194	utf8::downgrade $_[0]; # bug in unpack "H*"
		195	"$DB_HOME/res-data-" . unpack "H*", $_[0]
		196	}
		197
		198	sub sync {
		199	# for debugging
		200	#DC::DB::Server::req (sync => sub { });
		201	DC::DB::Server::sync ();
		202	}
		203
		204	sub unlink($$) {
		205	DC::DB::Server::req (unlink => @_);
		206	}
		207
		208	sub read_file($$) {
		209	DC::DB::Server::req (read_file => @_);
		210	}
		211
		212	sub write_file($$$) {
		213	DC::DB::Server::req (write_file => @_);
		214	}
		215
		216	sub prefetch_file($$$) {
		217	DC::DB::Server::req (prefetch_file => @_);
		218	}
		219
		220	sub logprint($$$) {
		221	DC::DB::Server::req (logprint => @_);
		222	}
		223
		224	#############################################################################
		225
		226	# fetch the full face table first
		227	unless ($tilemap) {
		228	do_table facemap => sub {
		229	$tilemap = $_[0];
		230	delete $tilemap->{id};
		231	my %maptile = reverse %$tilemap;#d#
		232	if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
		233	$tilemap = { };#d#
		234	DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		235	}#d#
		236	};
		237	}
		238
		239	package DC::DB::Server;
		240
		241	use strict;
		242
		243	use EV ();
		244	use Fcntl;
106		245
107	our %CB;	246	our %CB;
108	our $FH;	247	our $FH;
109	our $ID = "aaa0";	248	our $ID = "aaa0";
110	our ($fh_r_watcher, $fh_w_watcher);	249	our ($fh_r_watcher, $fh_w_watcher);
115	sub fh_write {	254	sub fh_write {
116	my $len = syswrite $FH, $write_buf;	255	my $len = syswrite $FH, $write_buf;
117		256
118	substr $write_buf, 0, $len, "";	257	substr $write_buf, 0, $len, "";
119		258
120	undef $fh_w_watcher	259	$fh_w_watcher->stop
121	unless length $write_buf;	260	unless length $write_buf;
122	}	261	}
123		262
124	sub fh_read {	263	sub fh_read {
125	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	264	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
161		300
162	my $id = ++$ID;	301	my $id = ++$ID;
163	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	302	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
164	$CB{$id} = $cb;	303	$CB{$id} = $cb;
165		304
166	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	305	$fh_w_watcher->start;
167	}	306	}
168		307
169	sub sync_tick {	308	sub do_unlink {
170	req "sync", sub { };	309	unlink $_[0];
171	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
172	}	310	}
173		311
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 => $data)
192	}
193
194	sub do_table {	312	sub do_read_file {
195	my ($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) = @_;	313	my ($path) = @_;
209		314
210	my $id;	315	utf8::downgrade $path;
211	my $table = table "facemap";	316	open my $fh, "<:raw", $path
		317	or return;
		318	sysread $fh, my $buf, -s $fh;
212		319
213	return $id	320	$buf
214	if $table->db_get ($hash, $id) == 0;	321	}
215		322
216	for (1..100) {	323	sub do_write_file {
217	my $txn = $DB_ENV->txn_begin;	324	my ($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		325
225	return $id;	326	utf8::downgrade $path;
226	}	327	utf8::downgrade $data;
		328	open my $fh, ">:raw", $path
		329	or return;
		330	syswrite $fh, $data;
		331	close $fh;
		332
		333	1
		334	}
		335
		336	sub do_prefetch_file {
		337	my ($path, $size) = @_;
		338
		339	utf8::downgrade $path;
		340	open my $fh, "<:raw", $path
		341	or return;
		342	sysread $fh, my $buf, $size;
		343
		344	1
		345	}
		346
		347	our %LOG_FH;
		348
		349	sub do_logprint {
		350	my ($path, $line) = @_;
		351
		352	$LOG_FH{$path} \|\|= do {
		353	open my $fh, ">>:utf8", $path
		354	or warn "Couldn't open logfile $path: $!";
		355
		356	$fh->autoflush (1);
		357
227	}	358	$fh
228	$txn->txn_abort;
229	}	359	};
230		360
231	die "maximum number of transaction retries reached - database problems?";	361	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		362
		363	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		364	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		365
		366	print { $LOG_FH{$path} } "$ts $line\n"
232	}	367	}
233		368
234	sub run {	369	sub run {
235	($FH, my $fh) = CFPlus::socketpipe;	370	($FH, my $fh) = DC::socketpipe;
236		371
237	my $oldfh = select $FH; $\| = 1; select $oldfh;	372	my $oldfh = select $FH; $\| = 1; select $oldfh;
238	my $oldfh = select $fh; $\| = 1; select $oldfh;	373	my $oldfh = select $fh; $\| = 1; select $oldfh;
239		374
240	my $pid = fork;	375	my $pid = fork;
241		376
242	if (defined $pid && !$pid) {	377	if (defined $pid && !$pid) {
		378	local $SIG{QUIT} = "IGNORE";
243	local $SIG{__DIE__};	379	local $SIG{__DIE__};
		380	local $SIG{__WARN__};
244	eval {	381	eval {
245	close $FH;	382	close $FH;
246
247	unless (eval { open_db }) {
248	File::Path::rmtree $DB_HOME;
249	open_db;
250	}
251		383
252	while () {	384	while () {
253	4 == read $fh, my $len, 4	385	4 == read $fh, my $len, 4
254	or last;	386	or last;
255	$len = unpack "N", $len;	387	$len = unpack "N", $len;
…		…
257	or die "unexpected eof while reading request";	389	or die "unexpected eof while reading request";
258		390
259	$req = Storable::thaw $req;	391	$req = Storable::thaw $req;
260		392
261	my ($id, $type, @args) = @$req;	393	my ($id, $type, @args) = @$req;
262	my $cb = CFPlus::DB::Server->can ("do_$type")	394	my $cb = DC::DB::Server->can ("do_$type")
263	or die "$type: unknown database request type\n";	395	or die "$type: unknown database request type\n";
264	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	396	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
265	(syswrite $fh, $res) == length $res	397	(syswrite $fh, $res) == length $res
266	or die;	398	or die "DB::write: $!";
267	}	399	}
268	};	400	};
269		401
270	my $error = $@;	402	my $error = $@;
271		403
272	eval {	404	eval {
273	undef %DB_TABLE;
274	undef $DB_ENV;
275
276	Storable::store_fd [die => $error], $fh;	405	Storable::store_fd [die => $error], $fh;
277	};	406	};
278		407
		408	warn $error
		409	if $error;
		410
279	CFPlus::_exit 0;	411	DC::_exit 0;
280	}	412	}
281		413
282	close $fh;	414	close $fh;
283	fcntl $FH, F_SETFL, O_NONBLOCK;	415	DC::fh_nonblocking $FH, 1;
284		416
285	$CB{die} = sub { die shift };	417	$CB{die} = sub { die shift };
286		418
287	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	419	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
		420	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
		421	}
288		422
289	sync_tick;	423	sub stop {
		424	close $FH;
290	}	425	}
291		426
292	1;	427	1;
293		428
294	=back	429	=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 1.32 by root, Sat Jan 19 04:49:37 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 1.32 by root, Sat Jan 19 04:49:37 2008 UTC