[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 1.40 by root, Wed Nov 26 23:08:34 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 (); # finally	22	use Storable ();
		23	use Config;
		24	use BDB;
23		25
24	sub sync {	26	use DC;
25	# for debugging
26	#CFPlus::DB::Server::req (sync => sub { });
27	CFPlus::DB::Server::sync ();
28	}
29		27
30	sub get($$$) {	28	our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
31	CFPlus::DB::Server::req (get => @_);	29	our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
32	}	30	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
33		31
34	sub put($$$$) {	32	sub FIRST_TILE_ID () { 64 }
35	CFPlus::DB::Server::req (put => @_);
36	}
37		33
38	our $tilemap;	34	unless (-d $DB_HOME) {
39		35	if (-d "$Deliantra::VARDIR/$ODBDIR") {
40	sub get_tile_id_sync($) {	36	rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
41	my ($hash) = @_;	37	print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
42		38	} elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
43	# fetch the full face table first	39	rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
44	unless ($tilemap) {	40	print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
45	CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });	41	} else {
46	sync;	42	File::Path::mkpath [$DB_HOME]
		43	or die "unable to create database directory $DB_HOME: $!";
47	}	44	}
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	}	45	}
56		46
57	package CFPlus::DB::Server;	47	BDB::max_poll_time 0.03;
		48	BDB::max_parallel 1;
58		49
59	use strict;
60
61	use Fcntl;
62	use BerkeleyDB;
63
64	our $DB_HOME = "$Crossfire::VARDIR/cfplus";
65	our $DB_ENV;	50	our $DB_ENV;
66	our $DB_STATE;	51	our $DB_STATE;
67	our %DB_TABLE;	52	our %DB_TABLE;
		53	our $TILE_SEQ;
68		54
69	sub open_db {	55	sub try_open_db {
70	mkdir $DB_HOME, 0777;	56	File::Path::mkpath [$DB_HOME];
71	my $recover = $BerkeleyDB::db_version >= 4.4	57
72	? 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,
73	: 0;	75	0666;
74		76
75	$DB_ENV = new BerkeleyDB::Env	77	$! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
76	-Home => $DB_HOME,	78
77	-Cachesize => 8_000_000,	79	$DB_ENV = $env;
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		80
85	1	81	1
86	}	82	}
87		83
88	sub table($) {	84	sub table($) {
89	$DB_TABLE{$_[0]} \|\|= do {	85	$DB_TABLE{$_[0]} \|\|= do {
90	my ($table) = @_;	86	my ($table) = @_;
91		87
92	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;	88	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
93		89
94	new BerkeleyDB::Btree	90	my $db = db_create $DB_ENV;
95	-Env => $DB_ENV,	91	$db->set_flags (BDB::CHKSUM);
96	-Filename => $table,	92
97	# -Filename => "database",	93	db_open $db, undef, $table, undef, BDB::BTREE,
98	# -Subname => $table,	94	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
99	-Property => DB_CHKSUM,	95
100	-Flags => DB_CREATE \| DB_UPGRADE,	96	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
101	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"	97
		98	$db
		99	}
		100	}
		101
		102	#############################################################################
		103
		104	our $WATCHER;
		105	our $SYNC;
		106	our $facemap;
		107
		108	sub exists($$$) {
		109	my ($db, $key, $cb) = @_;
		110
		111	my $data;
		112	db_get table $db, undef, $key, $data, 0, sub {
		113	$cb->($! ? () : length $data);
102	}	114	};
103	}	115	}
104		116
105	our $SYNC_INTERVAL = 6;	117	sub get($$$) {
		118	my ($db, $key, $cb) = @_;
		119
		120	my $data;
		121	db_get table $db, undef, $key, $data, 0, sub {
		122	$cb->($! ? () : $data);
		123	};
		124	}
		125
		126	sub put($$$$) {
		127	my ($db, $key, $data, $cb) = @_;
		128
		129	db_put table $db, undef, $key, $data, 0, sub {
		130	$cb->($!);
		131	$SYNC->again unless $SYNC->is_active;
		132	};
		133	}
		134
		135	sub do_table {
		136	my ($db, $cb) = @_;
		137
		138	$db = table $db;
		139
		140	my $cursor = $db->cursor;
		141	my %kv;
		142
		143	for (;;) {
		144	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		145	last if $!;
		146	$kv{$k} = $v;
		147	}
		148
		149	$cb->(\%kv);
		150	}
		151
		152	sub do_get_tile_id {
		153	my ($name, $cb) = @_;
		154
		155	my $table = table "facemap";
		156	my $id;
		157
		158	db_get $table, undef, $name => $id, 0;
		159	$! or return $cb->($id);
		160
		161	unless ($TILE_SEQ) {
		162	$TILE_SEQ = $table->sequence;
		163	$TILE_SEQ->initial_value (FIRST_TILE_ID);
		164	$TILE_SEQ->set_cachesize (0);
		165	db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
		166	}
		167
		168	db_sequence_get $TILE_SEQ, undef, 1, my $id;
		169
		170	die "unable to allocate tile id: $!"
		171	if $!;
		172
		173	db_put $table, undef, $name => $id, 0;
		174	$cb->($id);
		175
		176	}
		177
		178	sub get_tile_id_sync($) {
		179	my ($name) = @_;
		180
		181	$facemap->{$name} \|\|= do {
		182	my $id;
		183	do_get_tile_id $name, sub {
		184	$id = $_[0];
		185	};
		186	BDB::flush;
		187	$id
		188	}
		189	}
		190
		191	#############################################################################
		192
		193	sub path_of_res($) {
		194	utf8::downgrade $_[0]; # bug in unpack "H*"
		195	"$DB_HOME/res-data-" . unpack "H*", $_[0]
		196	}
		197
		198	sub sync {
		199	# for debugging
		200	#DC::DB::Server::req (sync => sub { });
		201	DC::DB::Server::sync ();
		202	}
		203
		204	sub unlink($$) {
		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	package DC::DB::Server;
		227
		228	use strict;
		229
		230	use EV ();
		231	use Fcntl;
106		232
107	our %CB;	233	our %CB;
108	our $FH;	234	our $FH;
109	our $ID = "aaa0";	235	our $ID = "aaa0";
110	our ($fh_r_watcher, $fh_w_watcher);	236	our ($fh_r_watcher, $fh_w_watcher);
115	sub fh_write {	241	sub fh_write {
116	my $len = syswrite $FH, $write_buf;	242	my $len = syswrite $FH, $write_buf;
117		243
118	substr $write_buf, 0, $len, "";	244	substr $write_buf, 0, $len, "";
119		245
120	undef $fh_w_watcher	246	$fh_w_watcher->stop
121	unless length $write_buf;	247	unless length $write_buf;
122	}	248	}
123		249
124	sub fh_read {	250	sub fh_read {
125	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	251	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
161		287
162	my $id = ++$ID;	288	my $id = ++$ID;
163	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	289	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
164	$CB{$id} = $cb;	290	$CB{$id} = $cb;
165		291
166	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	292	$fh_w_watcher->start;
167	}	293	}
168		294
169	sub sync_tick {	295	sub do_unlink {
170	req "sync", sub { };	296	unlink $_[0];
171	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
172	}	297	}
173		298
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 => $data)
192	}
193
194	sub do_table {	299	sub do_read_file {
195	my ($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) = @_;	300	my ($path) = @_;
209		301
210	my $id;	302	utf8::downgrade $path;
211	my $table = table "facemap";	303	open my $fh, "<:raw", $path
		304	or return;
		305	sysread $fh, my $buf, -s $fh;
212		306
213	return $id	307	$buf
214	if $table->db_get ($hash, $id) == 0;	308	}
215		309
216	for (1..100) {	310	sub do_write_file {
217	my $txn = $DB_ENV->txn_begin;	311	my ($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		312
225	return $id;	313	utf8::downgrade $path;
226	}	314	utf8::downgrade $data;
		315	open my $fh, ">:raw", $path
		316	or return;
		317	syswrite $fh, $data;
		318	close $fh;
		319
		320	1
		321	}
		322
		323	sub do_prefetch_file {
		324	my ($path, $size) = @_;
		325
		326	utf8::downgrade $path;
		327	open my $fh, "<:raw", $path
		328	or return;
		329	sysread $fh, my $buf, $size;
		330
		331	1
		332	}
		333
		334	our %LOG_FH;
		335
		336	sub do_logprint {
		337	my ($path, $line) = @_;
		338
		339	$LOG_FH{$path} \|\|= do {
		340	open my $fh, ">>:utf8", $path
		341	or warn "Couldn't open logfile $path: $!";
		342
		343	$fh->autoflush (1);
		344
227	}	345	$fh
228	$txn->txn_abort;
229	}	346	};
230		347
231	die "maximum number of transaction retries reached - database problems?";	348	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		349
		350	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		351	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		352
		353	print { $LOG_FH{$path} } "$ts $line\n"
232	}	354	}
233		355
234	sub run {	356	sub run {
235	($FH, my $fh) = CFPlus::socketpipe;	357	($FH, my $fh) = DC::socketpipe;
236		358
237	my $oldfh = select $FH; $\| = 1; select $oldfh;	359	my $oldfh = select $FH; $\| = 1; select $oldfh;
238	my $oldfh = select $fh; $\| = 1; select $oldfh;	360	my $oldfh = select $fh; $\| = 1; select $oldfh;
239		361
240	my $pid = fork;	362	my $pid = fork;
241		363
242	if (defined $pid && !$pid) {	364	if (defined $pid && !$pid) {
		365	local $SIG{QUIT} = "IGNORE";
243	local $SIG{__DIE__};	366	local $SIG{__DIE__};
		367	local $SIG{__WARN__};
244	eval {	368	eval {
245	close $FH;	369	close $FH;
246
247	unless (eval { open_db }) {
248	File::Path::rmtree $DB_HOME;
249	open_db;
250	}
251		370
252	while () {	371	while () {
253	4 == read $fh, my $len, 4	372	4 == read $fh, my $len, 4
254	or last;	373	or last;
255	$len = unpack "N", $len;	374	$len = unpack "N", $len;
…		…
257	or die "unexpected eof while reading request";	376	or die "unexpected eof while reading request";
258		377
259	$req = Storable::thaw $req;	378	$req = Storable::thaw $req;
260		379
261	my ($id, $type, @args) = @$req;	380	my ($id, $type, @args) = @$req;
262	my $cb = CFPlus::DB::Server->can ("do_$type")	381	my $cb = DC::DB::Server->can ("do_$type")
263	or die "$type: unknown database request type\n";	382	or die "$type: unknown database request type\n";
264	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	383	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
265	(syswrite $fh, $res) == length $res	384	(syswrite $fh, $res) == length $res
266	or die;	385	or die "DB::write: $!";
267	}	386	}
268	};	387	};
269		388
270	my $error = $@;	389	my $error = $@;
271		390
272	eval {	391	eval {
273	undef %DB_TABLE;
274	undef $DB_ENV;
275
276	Storable::store_fd [die => $error], $fh;	392	Storable::store_fd [die => $error], $fh;
277	};	393	};
278		394
		395	warn $error
		396	if $error;
		397
279	CFPlus::_exit 0;	398	DC::_exit 0;
280	}	399	}
281		400
282	close $fh;	401	close $fh;
283	fcntl $FH, F_SETFL, O_NONBLOCK;	402	DC::fh_nonblocking $FH, 1;
284		403
285	$CB{die} = sub { die shift };	404	$CB{die} = sub { die shift };
286		405
287	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	406	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
		407	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
		408	}
288		409
289	sync_tick;	410	sub stop {
		411	close $FH;
		412	}
		413
		414	package DC::DB;
		415
		416	sub nuke_db {
		417	File::Path::mkpath [$DB_HOME];
		418	eval { File::Path::rmtree $DB_HOME };
		419	}
		420
		421	sub open_db {
		422	unless (eval { try_open_db }) {
		423	warn "$@";#d#
		424	eval { nuke_db };
		425	try_open_db;
		426	}
		427
		428	# fetch the full face table first
		429	unless ($facemap) {
		430	do_table facemap => sub {
		431	$facemap = $_[0];
		432	delete $facemap->{id};
		433	my %maptile = reverse %$facemap;#d#
		434	if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
		435	$facemap = { };#d#
		436	DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		437	}#d#
		438	};
		439	}
		440
		441	$WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		442	$SYNC = EV::timer_ns 0, 60, sub {
		443	$_[0]->stop;
		444	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		445	};
		446	}
		447
		448	END {
		449	db_env_txn_checkpoint $DB_ENV, 0, 0, 0
		450	if $DB_ENV;
		451
		452	undef $TILE_SEQ;
		453	%DB_TABLE = ();
		454	undef $DB_ENV;
290	}	455	}
291		456
292	1;	457	1;
293		458
294	=back	459	=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 1.40 by root, Wed Nov 26 23:08:34 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 1.40 by root, Wed Nov 26 23:08:34 2008 UTC