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

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.3 by root, Fri Apr 6 21:53:56 2007 UTC vs.
Revision 1.33 by root, Tue Mar 25 21:11:51 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	use CFPlus;	25	use DC;
25		26
26	sub sync {	27	our $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
27	# for debugging	28	our $DBDIR = "client-" . BDB::VERSION . "-$Config{archname}";
28	#CFPlus::DB::Server::req (sync => sub { });	29	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
29	CFPlus::DB::Server::sync ();
30	}
31		30
32	sub get($$$) {	31	if (!-e $DB_HOME and -e "$Deliantra::VARDIR/$ODBDIR") {
33	CFPlus::DB::Server::req (get => @_);	32	rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
		33	print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
34	}	34	}
35		35
36	sub put($$$$) {	36	if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$ODBDIR") {
37	CFPlus::DB::Server::req (put => @_);	37	rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
		38	print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
38	}	39	}
39		40
40	our $tilemap;	41	BDB::max_poll_time 0.03;
		42	BDB::max_parallel 1;
41		43
42	sub get_tile_id_sync($) {
43	my ($hash) = @_;
44
45	# fetch the full face table first
46	unless ($tilemap) {
47	CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });
48	sync;
49	}
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	}
58
59	package CFPlus::DB::Server;
60
61	use strict;
62
63	use Fcntl;
64	use BerkeleyDB;
65
66	our $DB_HOME = "$Crossfire::VARDIR/cfplus";
67	our $DB_ENV;	44	our $DB_ENV;
68	our $DB_STATE;	45	our $DB_STATE;
69	our %DB_TABLE;	46	our %DB_TABLE;
70		47
71	sub open_db {	48	sub try_open_db {
72	mkdir $DB_HOME, 0777;	49	mkdir $DB_HOME, 0777;
73	my $recover = $BerkeleyDB::db_version >= 4.4	50
74	? 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,
75	: 0;	62	0666;
76		63
77	$DB_ENV = new BerkeleyDB::Env	64	$! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
78	-Home => $DB_HOME,
79	-Cachesize => 8_000_000,
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		65
87	1	66	1
88	}	67	}
89		68
90	sub table($) {	69	sub table($) {
91	$DB_TABLE{$_[0]} \|\|= do {	70	$DB_TABLE{$_[0]} \|\|= do {
92	my ($table) = @_;	71	my ($table) = @_;
93		72
94	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;	73	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
95		74
96	new BerkeleyDB::Btree	75	my $db = db_create $DB_ENV;
97	-Env => $DB_ENV,	76	$db->set_flags (BDB::CHKSUM);
98	-Filename => $table,	77
99	# -Filename => "database",	78	db_open $db, undef, $table, undef, BDB::BTREE,
100	# -Subname => $table,	79	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
101	-Property => DB_CHKSUM,	80
102	-Flags => DB_CREATE \| DB_UPGRADE,	81	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
103	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"	82
		83	$db
		84	}
		85	}
		86
		87	#############################################################################
		88
		89	our $WATCHER;
		90	our $SYNC;
		91	our $tilemap;
		92
		93	sub exists($$$) {
		94	my ($db, $key, $cb) = @_;
		95
		96	my $data;
		97	db_get table $db, undef, $key, $data, 0, sub {
		98	$cb->($! ? () : length $data);
104	}	99	};
105	}	100	}
106		101
107	our $SYNC_INTERVAL = 6;	102	sub get($$$) {
		103	my ($db, $key, $cb) = @_;
		104
		105	my $data;
		106	db_get table $db, undef, $key, $data, 0, sub {
		107	$cb->($! ? () : $data);
		108	};
		109	}
		110
		111	sub put($$$$) {
		112	my ($db, $key, $data, $cb) = @_;
		113
		114	db_put table $db, undef, $key, $data, 0, sub {
		115	$cb->($!);
		116	$SYNC->again unless $SYNC->is_active;
		117	};
		118	}
		119
		120	sub do_table {
		121	my ($db, $cb) = @_;
		122
		123	$db = table $db;
		124
		125	my $cursor = $db->cursor;
		126	my %kv;
		127
		128	for (;;) {
		129	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		130	last if $!;
		131	$kv{$k} = $v;
		132	}
		133
		134	$cb->(\%kv);
		135	}
		136
		137	sub do_get_tile_id {
		138	my ($name, $cb) = @_;
		139
		140	my $table = table "facemap";
		141	my $id;
		142
		143	db_get $table, undef, $name, $id, 0;
		144	return $cb->($id) unless $!;
		145
		146	for (1..100) {
		147	my $txn = $DB_ENV->txn_begin;
		148	db_get $table, $txn, id => $id, 0;
		149
		150	$id = 64 if $id < 64;
		151
		152	++$id;
		153
		154	db_put $table, $txn, id => $id, 0;
		155	db_txn_finish $txn;
		156
		157	$SYNC->again unless $SYNC->is_active;
		158
		159	return $cb->($id) unless $!;
		160
		161	select undef, undef, undef, 0.01 * rand;
		162	}
		163
		164	die "maximum number of transaction retries reached - database problems?";
		165	}
		166
		167	sub get_tile_id_sync($) {
		168	my ($name) = @_;
		169
		170	$tilemap->{$name} \|\|= do {
		171	my $id;
		172	do_get_tile_id $name, sub {
		173	$id = $_[0];
		174	};
		175	BDB::flush;
		176	$id
		177	}
		178	}
		179
		180	#############################################################################
		181
		182	sub path_of_res($) {
		183	utf8::downgrade $_[0]; # bug in unpack "H*"
		184	"$DB_HOME/res-data-" . unpack "H*", $_[0]
		185	}
		186
		187	sub sync {
		188	# for debugging
		189	#DC::DB::Server::req (sync => sub { });
		190	DC::DB::Server::sync ();
		191	}
		192
		193	sub unlink($$) {
		194	DC::DB::Server::req (unlink => @_);
		195	}
		196
		197	sub read_file($$) {
		198	DC::DB::Server::req (read_file => @_);
		199	}
		200
		201	sub write_file($$$) {
		202	DC::DB::Server::req (write_file => @_);
		203	}
		204
		205	sub prefetch_file($$$) {
		206	DC::DB::Server::req (prefetch_file => @_);
		207	}
		208
		209	sub logprint($$$) {
		210	DC::DB::Server::req (logprint => @_);
		211	}
		212
		213	#############################################################################
		214
		215	package DC::DB::Server;
		216
		217	use strict;
		218
		219	use EV ();
		220	use Fcntl;
108		221
109	our %CB;	222	our %CB;
110	our $FH;	223	our $FH;
111	our $ID = "aaa0";	224	our $ID = "aaa0";
112	our ($fh_r_watcher, $fh_w_watcher);	225	our ($fh_r_watcher, $fh_w_watcher);
117	sub fh_write {	230	sub fh_write {
118	my $len = syswrite $FH, $write_buf;	231	my $len = syswrite $FH, $write_buf;
119		232
120	substr $write_buf, 0, $len, "";	233	substr $write_buf, 0, $len, "";
121		234
122	undef $fh_w_watcher	235	$fh_w_watcher->stop
123	unless length $write_buf;	236	unless length $write_buf;
124	}	237	}
125		238
126	sub fh_read {	239	sub fh_read {
127	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	240	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
163		276
164	my $id = ++$ID;	277	my $id = ++$ID;
165	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	278	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
166	$CB{$id} = $cb;	279	$CB{$id} = $cb;
167		280
168	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	281	$fh_w_watcher->start;
169	}	282	}
170		283
171	sub sync_tick {	284	sub do_unlink {
172	req "sync", sub { };	285	unlink $_[0];
173	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
174	}	286	}
175		287
176	sub do_sync {
177	$DB_ENV->txn_checkpoint (0, 0, 0);
178	()
179	}
180
181	sub do_get {
182	my ($db, $key) = @_;
183
184	my $data;
185	(table $db)->db_get ($key, $data) == 0
186	? $data
187	: ()
188	}
189
190	sub do_put {
191	my ($db, $key, $data) = @_;
192
193	(table $db)->db_put ($key => $data)
194	}
195
196	sub do_table {	288	sub do_read_file {
197	my ($db) = @_;
198
199	$db = table $db;
200
201	my $cursor = $db->db_cursor;
202	my %kv;
203	my ($k, $v);
204	$kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
205
206	\%kv
207	}
208
209	sub do_get_tile_id {
210	my ($hash) = @_;	289	my ($path) = @_;
211		290
212	my $id;	291	utf8::downgrade $path;
213	my $table = table "facemap";	292	open my $fh, "<:raw", $path
		293	or return;
		294	sysread $fh, my $buf, -s $fh;
214		295
215	return $id	296	$buf
216	if $table->db_get ($hash, $id) == 0;	297	}
217		298
218	for (1..100) {	299	sub do_write_file {
219	my $txn = $DB_ENV->txn_begin;	300	my ($path, $data) = @_;
220	my $status = $table->db_get (id => $id);
221	if ($status == 0 \|\| $status == BerkeleyDB::DB_NOTFOUND) {
222	$id = ($id \|\| 64) + 1;
223	if ($table->db_put (id => $id) == 0
224	&& $table->db_put ($hash => $id) == 0) {
225	$txn->txn_commit;
226		301
227	return $id;	302	utf8::downgrade $path;
228	}	303	utf8::downgrade $data;
		304	open my $fh, ">:raw", $path
		305	or return;
		306	syswrite $fh, $data;
		307	close $fh;
		308
		309	1
		310	}
		311
		312	sub do_prefetch_file {
		313	my ($path, $size) = @_;
		314
		315	utf8::downgrade $path;
		316	open my $fh, "<:raw", $path
		317	or return;
		318	sysread $fh, my $buf, $size;
		319
		320	1
		321	}
		322
		323	our %LOG_FH;
		324
		325	sub do_logprint {
		326	my ($path, $line) = @_;
		327
		328	$LOG_FH{$path} \|\|= do {
		329	open my $fh, ">>:utf8", $path
		330	or warn "Couldn't open logfile $path: $!";
		331
		332	$fh->autoflush (1);
		333
229	}	334	$fh
230	$txn->txn_abort;
231	}	335	};
232		336
233	die "maximum number of transaction retries reached - database problems?";	337	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		338
		339	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		340	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		341
		342	print { $LOG_FH{$path} } "$ts $line\n"
234	}	343	}
235		344
236	sub run {	345	sub run {
237	($FH, my $fh) = CFPlus::socketpipe;	346	($FH, my $fh) = DC::socketpipe;
238		347
239	my $oldfh = select $FH; $\| = 1; select $oldfh;	348	my $oldfh = select $FH; $\| = 1; select $oldfh;
240	my $oldfh = select $fh; $\| = 1; select $oldfh;	349	my $oldfh = select $fh; $\| = 1; select $oldfh;
241		350
242	my $pid = fork;	351	my $pid = fork;
243		352
244	if (defined $pid && !$pid) {	353	if (defined $pid && !$pid) {
		354	local $SIG{QUIT} = "IGNORE";
245	local $SIG{__DIE__};	355	local $SIG{__DIE__};
		356	local $SIG{__WARN__};
246	eval {	357	eval {
247	close $FH;	358	close $FH;
248
249	unless (eval { open_db }) {
250	File::Path::rmtree $DB_HOME;
251	open_db;
252	}
253		359
254	while () {	360	while () {
255	4 == read $fh, my $len, 4	361	4 == read $fh, my $len, 4
256	or last;	362	or last;
257	$len = unpack "N", $len;	363	$len = unpack "N", $len;
…		…
259	or die "unexpected eof while reading request";	365	or die "unexpected eof while reading request";
260		366
261	$req = Storable::thaw $req;	367	$req = Storable::thaw $req;
262		368
263	my ($id, $type, @args) = @$req;	369	my ($id, $type, @args) = @$req;
264	my $cb = CFPlus::DB::Server->can ("do_$type")	370	my $cb = DC::DB::Server->can ("do_$type")
265	or die "$type: unknown database request type\n";	371	or die "$type: unknown database request type\n";
266	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	372	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
267	(syswrite $fh, $res) == length $res	373	(syswrite $fh, $res) == length $res
268	or die;	374	or die "DB::write: $!";
269	}	375	}
270	};	376	};
271		377
272	my $error = $@;	378	my $error = $@;
273		379
274	eval {	380	eval {
275	undef %DB_TABLE;
276	undef $DB_ENV;
277
278	Storable::store_fd [die => $error], $fh;	381	Storable::store_fd [die => $error], $fh;
279	};	382	};
280		383
		384	warn $error
		385	if $error;
		386
281	CFPlus::_exit 0;	387	DC::_exit 0;
282	}	388	}
283		389
284	close $fh;	390	close $fh;
285	CFPlus::fh_nonblocking $FH, 1;	391	DC::fh_nonblocking $FH, 1;
286		392
287	$CB{die} = sub { die shift };	393	$CB{die} = sub { die shift };
288		394
289	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	395	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
		396	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
		397	}
290		398
291	sync_tick;	399	sub stop {
		400	close $FH;
		401	}
		402
		403	package DC::DB;
		404
		405	sub open_db {
		406	unless (eval { try_open_db }) {
		407	warn "$@";#d#
		408	eval { File::Path::rmtree $DB_HOME };
		409	try_open_db;
		410	}
		411
		412	# fetch the full face table first
		413	unless ($tilemap) {
		414	do_table facemap => sub {
		415	$tilemap = $_[0];
		416	delete $tilemap->{id};
		417	my %maptile = reverse %$tilemap;#d#
		418	if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
		419	$tilemap = { };#d#
		420	DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		421	}#d#
		422	};
		423	}
		424
		425	$WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		426	$SYNC = EV::timer_ns 0, 60, sub {
		427	$_[0]->stop;
		428	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		429	};
		430	}
		431
		432	END {
		433	%DB_TABLE = ();
		434	undef $DB_ENV;
292	}	435	}
293		436
294	1;	437	1;
295		438
296	=back	439	=back

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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents): Revision 1.3 by root, Fri Apr 6 21:53:56 2007 UTC vs. Revision 1.33 by root, Tue Mar 25 21:11:51 2008 UTC

Diff Legend

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.3 by root, Fri Apr 6 21:53:56 2007 UTC vs.
Revision 1.33 by root, Tue Mar 25 21:11:51 2008 UTC