[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 1.35 by root, Sun Mar 30 06:05:52 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 $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
		29	our $DBDIR = "client-" . BDB::VERSION . "-$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	$DB_ENV = db_env_create;
		57
		58	$DB_ENV->set_errfile (\*STDERR);
		59	$DB_ENV->set_msgfile (\*STDERR);
		60	$DB_ENV->set_verbose (-1, 1);
		61
		62	$DB_ENV->set_flags (BDB::AUTO_COMMIT \| BDB::LOG_AUTOREMOVE \| BDB::TXN_WRITE_NOSYNC);
		63	$DB_ENV->set_cachesize (0, 2048 * 1024, 0);
		64
		65	db_env_open $DB_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 $DB_HOME: " . BDB::strerror;
		70
		71	1
		72	}
		73
		74	sub table($) {
		75	$DB_TABLE{$_[0]} \|\|= do {
		76	my ($table) = @_;
		77
		78	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
		79
		80	my $db = db_create $DB_ENV;
		81	$db->set_flags (BDB::CHKSUM);
		82
		83	db_open $db, undef, $table, undef, BDB::BTREE,
		84	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
		85
		86	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
		87
		88	$db
		89	}
		90	}
		91
		92	#############################################################################
		93
		94	our $WATCHER;
		95	our $SYNC;
		96	our $facemap;
		97
		98	sub exists($$$) {
		99	my ($db, $key, $cb) = @_;
		100
		101	my $data;
		102	db_get table $db, undef, $key, $data, 0, sub {
		103	$cb->($! ? () : length $data);
		104	};
		105	}
		106
		107	sub get($$$) {
		108	my ($db, $key, $cb) = @_;
		109
		110	my $data;
		111	db_get table $db, undef, $key, $data, 0, sub {
		112	$cb->($! ? () : $data);
		113	};
		114	}
		115
		116	sub put($$$$) {
		117	my ($db, $key, $data, $cb) = @_;
		118
		119	db_put table $db, undef, $key, $data, 0, sub {
		120	$cb->($!);
		121	$SYNC->again unless $SYNC->is_active;
		122	};
		123	}
		124
		125	sub do_table {
		126	my ($db, $cb) = @_;
		127
		128	$db = table $db;
		129
		130	my $cursor = $db->cursor;
		131	my %kv;
		132
		133	for (;;) {
		134	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		135	last if $!;
		136	$kv{$k} = $v;
		137	}
		138
		139	$cb->(\%kv);
		140	}
		141
		142	sub do_get_tile_id {
		143	my ($name, $cb) = @_;
		144
		145	my $table = table "facemap";
		146	my $id;
		147
		148	db_get $table, undef, $name => $id, 0;
		149	$! or return $cb->($id);
		150
		151	unless ($TILE_SEQ) {
		152	$TILE_SEQ = $table->sequence;
		153	$TILE_SEQ->initial_value (64);
		154	$TILE_SEQ->set_cachesize (0);
		155	db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
		156	}
		157
		158	db_sequence_get $TILE_SEQ, undef, 1, my $id;
		159
		160	die "unable to allocate tile id: $!"
		161	if $!;
		162
		163	db_put $table, undef, $name => $id, 0;
		164	$cb->($id);
		165
		166	}
		167
		168	sub get_tile_id_sync($) {
		169	my ($name) = @_;
		170
		171	$facemap->{$name} \|\|= do {
		172	my $id;
		173	do_get_tile_id $name, sub {
		174	$id = $_[0];
		175	};
		176	BDB::flush;
		177	$id
		178	}
		179	}
		180
		181	#############################################################################
28		182
29	sub path_of_res($) {	183	sub path_of_res($) {
30	utf8::downgrade $_[0]; # bug in unpack "H*"	184	utf8::downgrade $_[0]; # bug in unpack "H*"
31	"$DB_HOME/res-data-" . unpack "H*", $_[0]	185	"$DB_HOME/res-data-" . unpack "H*", $_[0]
32	}	186	}
33		187
34	sub sync {	188	sub sync {
35	# for debugging	189	# for debugging
36	#CFPlus::DB::Server::req (sync => sub { });	190	#DC::DB::Server::req (sync => sub { });
37	CFPlus::DB::Server::sync ();	191	DC::DB::Server::sync ();
38	}
39
40	sub exists($$$) {
41	CFPlus::DB::Server::req (exists => @_);
42	}
43
44	sub get($$$) {
45	CFPlus::DB::Server::req (get => @_);
46	}
47
48	sub put($$$$) {
49	CFPlus::DB::Server::req (put => @_);
50	}	192	}
51		193
52	sub unlink($$) {	194	sub unlink($$) {
53	CFPlus::DB::Server::req (unlink => @_);	195	DC::DB::Server::req (unlink => @_);
		196	}
		197
		198	sub read_file($$) {
		199	DC::DB::Server::req (read_file => @_);
54	}	200	}
55		201
56	sub write_file($$$) {	202	sub write_file($$$) {
57	CFPlus::DB::Server::req (write_file => @_);	203	DC::DB::Server::req (write_file => @_);
58	}	204	}
59		205
60	sub prefetch_file($$$) {	206	sub prefetch_file($$$) {
61	CFPlus::DB::Server::req (prefetch_file => @_);	207	DC::DB::Server::req (prefetch_file => @_);
62	}	208	}
63		209
64	our $tilemap;	210	sub logprint($$$) {
65		211	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	}	212	}
82		213
		214	#############################################################################
		215
83	package CFPlus::DB::Server;	216	package DC::DB::Server;
84		217
85	use strict;	218	use strict;
86		219
		220	use EV ();
87	use Fcntl;	221	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		222
132	our %CB;	223	our %CB;
133	our $FH;	224	our $FH;
134	our $ID = "aaa0";	225	our $ID = "aaa0";
135	our ($fh_r_watcher, $fh_w_watcher);	226	our ($fh_r_watcher, $fh_w_watcher);
140	sub fh_write {	231	sub fh_write {
141	my $len = syswrite $FH, $write_buf;	232	my $len = syswrite $FH, $write_buf;
142		233
143	substr $write_buf, 0, $len, "";	234	substr $write_buf, 0, $len, "";
144		235
145	undef $fh_w_watcher	236	$fh_w_watcher->stop
146	unless length $write_buf;	237	unless length $write_buf;
147	}	238	}
148		239
149	sub fh_read {	240	sub fh_read {
150	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	241	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
186		277
187	my $id = ++$ID;	278	my $id = ++$ID;
188	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	279	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
189	$CB{$id} = $cb;	280	$CB{$id} = $cb;
190		281
191	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	282	$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	}	283	}
271		284
272	sub do_unlink {	285	sub do_unlink {
273	unlink $_[0];	286	unlink $_[0];
274	}	287	}
275		288
		289	sub do_read_file {
		290	my ($path) = @_;
		291
		292	utf8::downgrade $path;
		293	open my $fh, "<:raw", $path
		294	or return;
		295	sysread $fh, my $buf, -s $fh;
		296
		297	$buf
		298	}
		299
276	sub do_write_file {	300	sub do_write_file {
277	my ($file, $data) = @_;	301	my ($path, $data) = @_;
278		302
279	utf8::downgrade $file;	303	utf8::downgrade $path;
280	utf8::downgrade $data;	304	utf8::downgrade $data;
281	open my $fh, ">:raw", $file	305	open my $fh, ">:raw", $path
282	or return;	306	or return;
283	print $fh $data;	307	syswrite $fh, $data;
284	close $fh;	308	close $fh;
285		309
286	1	310	1
287	}	311	}
288		312
289	sub do_prefetch_file {	313	sub do_prefetch_file {
290	my ($file, $size) = @_;	314	my ($path, $size) = @_;
291		315
292	utf8::downgrade $file;	316	utf8::downgrade $path;
293	open my $fh, "<:raw", $file	317	open my $fh, "<:raw", $path
294	or return;	318	or return;
295	sysread $fh, my $buf, $size;	319	sysread $fh, my $buf, $size;
296		320
297	1	321	1
298	}	322	}
299		323
		324	our %LOG_FH;
		325
		326	sub do_logprint {
		327	my ($path, $line) = @_;
		328
		329	$LOG_FH{$path} \|\|= do {
		330	open my $fh, ">>:utf8", $path
		331	or warn "Couldn't open logfile $path: $!";
		332
		333	$fh->autoflush (1);
		334
		335	$fh
		336	};
		337
		338	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		339
		340	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		341	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		342
		343	print { $LOG_FH{$path} } "$ts $line\n"
		344	}
		345
300	sub run {	346	sub run {
301	($FH, my $fh) = CFPlus::socketpipe;	347	($FH, my $fh) = DC::socketpipe;
302		348
303	my $oldfh = select $FH; $\| = 1; select $oldfh;	349	my $oldfh = select $FH; $\| = 1; select $oldfh;
304	my $oldfh = select $fh; $\| = 1; select $oldfh;	350	my $oldfh = select $fh; $\| = 1; select $oldfh;
305		351
306	my $pid = fork;	352	my $pid = fork;
307		353
308	if (defined $pid && !$pid) {	354	if (defined $pid && !$pid) {
		355	local $SIG{QUIT} = "IGNORE";
309	local $SIG{__DIE__};	356	local $SIG{__DIE__};
		357	local $SIG{__WARN__};
310	eval {	358	eval {
311	close $FH;	359	close $FH;
312
313	unless (eval { open_db }) {
314	eval { File::Path::rmtree $DB_HOME };
315	open_db;
316	}
317		360
318	while () {	361	while () {
319	4 == read $fh, my $len, 4	362	4 == read $fh, my $len, 4
320	or last;	363	or last;
321	$len = unpack "N", $len;	364	$len = unpack "N", $len;
…		…
323	or die "unexpected eof while reading request";	366	or die "unexpected eof while reading request";
324		367
325	$req = Storable::thaw $req;	368	$req = Storable::thaw $req;
326		369
327	my ($id, $type, @args) = @$req;	370	my ($id, $type, @args) = @$req;
328	my $cb = CFPlus::DB::Server->can ("do_$type")	371	my $cb = DC::DB::Server->can ("do_$type")
329	or die "$type: unknown database request type\n";	372	or die "$type: unknown database request type\n";
330	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	373	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
331	(syswrite $fh, $res) == length $res	374	(syswrite $fh, $res) == length $res
332	or die;	375	or die "DB::write: $!";
333	}	376	}
334	};	377	};
335		378
336	my $error = $@;	379	my $error = $@;
337		380
338	eval {	381	eval {
339	undef %DB_TABLE;
340	undef $DB_ENV;
341
342	Storable::store_fd [die => $error], $fh;	382	Storable::store_fd [die => $error], $fh;
343	};	383	};
344		384
		385	warn $error
		386	if $error;
		387
345	CFPlus::_exit 0;	388	DC::_exit 0;
346	}	389	}
347		390
348	close $fh;	391	close $fh;
349	CFPlus::fh_nonblocking $FH, 1;	392	DC::fh_nonblocking $FH, 1;
350		393
351	$CB{die} = sub { die shift };	394	$CB{die} = sub { die shift };
352		395
353	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	396	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
354		397	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
355	sync_tick;
356	}	398	}
357		399
358	sub stop {	400	sub stop {
359	close $FH;	401	close $FH;
360	}	402	}
361		403
		404	package DC::DB;
		405
		406	sub nuke_db {
		407	File::Path::mkpath [$DB_HOME];
		408	eval { File::Path::rmtree $DB_HOME };
		409	}
		410
		411	sub open_db {
		412	unless (eval { try_open_db }) {
		413	warn "$@";#d#
		414	eval { nuke_db };
		415	try_open_db;
		416	}
		417
		418	# fetch the full face table first
		419	unless ($facemap) {
		420	do_table facemap => sub {
		421	$facemap = $_[0];
		422	delete $facemap->{id};
		423	my %maptile = reverse %$facemap;#d#
		424	if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
		425	$facemap = { };#d#
		426	DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		427	}#d#
		428	};
		429	}
		430
		431	$WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		432	$SYNC = EV::timer_ns 0, 60, sub {
		433	$_[0]->stop;
		434	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		435	};
		436	}
		437
		438	END {
		439	undef $TILE_SEQ;
		440	%DB_TABLE = ();
		441	undef $DB_ENV;
		442	}
		443
362	1;	444	1;
363		445
364	=back	446	=back
365		447
366	=head1 AUTHOR	448	=head1 AUTHOR

Diff Legend

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

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents): Revision 1.12 by root, Tue Jul 24 04:54:47 2007 UTC vs. Revision 1.35 by root, Sun Mar 30 06:05:52 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 1.35 by root, Sun Mar 30 06:05:52 2008 UTC