[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 1.35 by root, Sun Mar 30 06:05:52 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($$$) {	28	our $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
31	CFPlus::DB::Server::req (get => @_);	29	our $DBDIR = "client-" . BDB::VERSION . "-$Config{archname}";
32	}	30	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
33		31
34	sub put($$$$) {	32	unless (-d $DB_HOME) {
35	CFPlus::DB::Server::req (put => @_);	33	if (-d "$Deliantra::VARDIR/$ODBDIR") {
36	}	34	rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
37		35	print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
38	our $tilemap;	36	} elsif (-d "$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) = @_;	39	} else {
42		40	File::Path::mkpath [$DB_HOME]
43	# fetch the full face table first	41	or die "unable to create database directory $DB_HOME: $!";
44	unless ($tilemap) {
45	CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });
46	sync;
47	}	42	}
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	}	43	}
56		44
57	package CFPlus::DB::Server;	45	BDB::max_poll_time 0.03;
		46	BDB::max_parallel 1;
58		47
59	use strict;
60
61	use Fcntl;
62	use BerkeleyDB;
63
64	our $DB_HOME = "$Crossfire::VARDIR/cfplus";
65	our $DB_ENV;	48	our $DB_ENV;
66	our $DB_STATE;	49	our $DB_STATE;
67	our %DB_TABLE;	50	our %DB_TABLE;
		51	our $TILE_SEQ;
68		52
69	sub open_db {	53	sub try_open_db {
70	mkdir $DB_HOME, 0777;	54	File::Path::mkpath [$DB_HOME];
71	my $recover = $BerkeleyDB::db_version >= 4.4	55
72	? eval "DB_REGISTER \| DB_RECOVER"	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,
73	: 0;	67	0666;
74		68
75	$DB_ENV = new BerkeleyDB::Env	69	$! 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		70
85	1	71	1
86	}	72	}
87		73
88	sub table($) {	74	sub table($) {
89	$DB_TABLE{$_[0]} \|\|= do {	75	$DB_TABLE{$_[0]} \|\|= do {
90	my ($table) = @_;	76	my ($table) = @_;
91		77
92	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;	78	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
93		79
94	new BerkeleyDB::Btree	80	my $db = db_create $DB_ENV;
95	-Env => $DB_ENV,	81	$db->set_flags (BDB::CHKSUM);
96	-Filename => $table,	82
97	# -Filename => "database",	83	db_open $db, undef, $table, undef, BDB::BTREE,
98	# -Subname => $table,	84	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
99	-Property => DB_CHKSUM,	85
100	-Flags => DB_CREATE \| DB_UPGRADE,	86	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
101	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"	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);
102	}	104	};
103	}	105	}
104		106
105	our $SYNC_INTERVAL = 6;	107	sub get($$$) {
		108	my ($db, $key, $cb) = @_;
		109
		110	my $data;
		111	db_get table $db, undef, $key, $data, 0, sub {
		112	$cb->($! ? () : $data);
		113	};
		114	}
		115
		116	sub put($$$$) {
		117	my ($db, $key, $data, $cb) = @_;
		118
		119	db_put table $db, undef, $key, $data, 0, sub {
		120	$cb->($!);
		121	$SYNC->again unless $SYNC->is_active;
		122	};
		123	}
		124
		125	sub do_table {
		126	my ($db, $cb) = @_;
		127
		128	$db = table $db;
		129
		130	my $cursor = $db->cursor;
		131	my %kv;
		132
		133	for (;;) {
		134	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		135	last if $!;
		136	$kv{$k} = $v;
		137	}
		138
		139	$cb->(\%kv);
		140	}
		141
		142	sub do_get_tile_id {
		143	my ($name, $cb) = @_;
		144
		145	my $table = table "facemap";
		146	my $id;
		147
		148	db_get $table, undef, $name => $id, 0;
		149	$! or return $cb->($id);
		150
		151	unless ($TILE_SEQ) {
		152	$TILE_SEQ = $table->sequence;
		153	$TILE_SEQ->initial_value (64);
		154	$TILE_SEQ->set_cachesize (0);
		155	db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
		156	}
		157
		158	db_sequence_get $TILE_SEQ, undef, 1, my $id;
		159
		160	die "unable to allocate tile id: $!"
		161	if $!;
		162
		163	db_put $table, undef, $name => $id, 0;
		164	$cb->($id);
		165
		166	}
		167
		168	sub get_tile_id_sync($) {
		169	my ($name) = @_;
		170
		171	$facemap->{$name} \|\|= do {
		172	my $id;
		173	do_get_tile_id $name, sub {
		174	$id = $_[0];
		175	};
		176	BDB::flush;
		177	$id
		178	}
		179	}
		180
		181	#############################################################################
		182
		183	sub path_of_res($) {
		184	utf8::downgrade $_[0]; # bug in unpack "H*"
		185	"$DB_HOME/res-data-" . unpack "H*", $_[0]
		186	}
		187
		188	sub sync {
		189	# for debugging
		190	#DC::DB::Server::req (sync => sub { });
		191	DC::DB::Server::sync ();
		192	}
		193
		194	sub unlink($$) {
		195	DC::DB::Server::req (unlink => @_);
		196	}
		197
		198	sub read_file($$) {
		199	DC::DB::Server::req (read_file => @_);
		200	}
		201
		202	sub write_file($$$) {
		203	DC::DB::Server::req (write_file => @_);
		204	}
		205
		206	sub prefetch_file($$$) {
		207	DC::DB::Server::req (prefetch_file => @_);
		208	}
		209
		210	sub logprint($$$) {
		211	DC::DB::Server::req (logprint => @_);
		212	}
		213
		214	#############################################################################
		215
		216	package DC::DB::Server;
		217
		218	use strict;
		219
		220	use EV ();
		221	use Fcntl;
106		222
107	our %CB;	223	our %CB;
108	our $FH;	224	our $FH;
109	our $ID = "aaa0";	225	our $ID = "aaa0";
110	our ($fh_r_watcher, $fh_w_watcher);	226	our ($fh_r_watcher, $fh_w_watcher);
115	sub fh_write {	231	sub fh_write {
116	my $len = syswrite $FH, $write_buf;	232	my $len = syswrite $FH, $write_buf;
117		233
118	substr $write_buf, 0, $len, "";	234	substr $write_buf, 0, $len, "";
119		235
120	undef $fh_w_watcher	236	$fh_w_watcher->stop
121	unless length $write_buf;	237	unless length $write_buf;
122	}	238	}
123		239
124	sub fh_read {	240	sub fh_read {
125	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	241	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
161		277
162	my $id = ++$ID;	278	my $id = ++$ID;
163	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	279	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
164	$CB{$id} = $cb;	280	$CB{$id} = $cb;
165		281
166	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	282	$fh_w_watcher->start;
167	}	283	}
168		284
169	sub sync_tick {	285	sub do_unlink {
170	req "sync", sub { };	286	unlink $_[0];
171	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
172	}	287	}
173		288
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 => $data)
192	}
193
194	sub do_table {	289	sub do_read_file {
195	my ($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) = @_;	290	my ($path) = @_;
209		291
210	my $id;	292	utf8::downgrade $path;
211	my $table = table "facemap";	293	open my $fh, "<:raw", $path
		294	or return;
		295	sysread $fh, my $buf, -s $fh;
212		296
213	return $id	297	$buf
214	if $table->db_get ($hash, $id) == 0;	298	}
215		299
216	for (1..100) {	300	sub do_write_file {
217	my $txn = $DB_ENV->txn_begin;	301	my ($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		302
225	return $id;	303	utf8::downgrade $path;
226	}	304	utf8::downgrade $data;
		305	open my $fh, ">:raw", $path
		306	or return;
		307	syswrite $fh, $data;
		308	close $fh;
		309
		310	1
		311	}
		312
		313	sub do_prefetch_file {
		314	my ($path, $size) = @_;
		315
		316	utf8::downgrade $path;
		317	open my $fh, "<:raw", $path
		318	or return;
		319	sysread $fh, my $buf, $size;
		320
		321	1
		322	}
		323
		324	our %LOG_FH;
		325
		326	sub do_logprint {
		327	my ($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
227	}	335	$fh
228	$txn->txn_abort;
229	}	336	};
230		337
231	die "maximum number of transaction retries reached - database problems?";	338	my ($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 $line\n"
232	}	344	}
233		345
234	sub run {	346	sub run {
235	($FH, my $fh) = CFPlus::socketpipe;	347	($FH, my $fh) = DC::socketpipe;
236		348
237	my $oldfh = select $FH; $\| = 1; select $oldfh;	349	my $oldfh = select $FH; $\| = 1; select $oldfh;
238	my $oldfh = select $fh; $\| = 1; select $oldfh;	350	my $oldfh = select $fh; $\| = 1; select $oldfh;
239		351
240	my $pid = fork;	352	my $pid = fork;
241		353
242	if (defined $pid && !$pid) {	354	if (defined $pid && !$pid) {
		355	local $SIG{QUIT} = "IGNORE";
243	local $SIG{__DIE__};	356	local $SIG{__DIE__};
		357	local $SIG{__WARN__};
244	eval {	358	eval {
245	close $FH;	359	close $FH;
246
247	unless (eval { open_db }) {
248	File::Path::rmtree $DB_HOME;
249	open_db;
250	}
251		360
252	while () {	361	while () {
253	4 == read $fh, my $len, 4	362	4 == read $fh, my $len, 4
254	or last;	363	or last;
255	$len = unpack "N", $len;	364	$len = unpack "N", $len;
…		…
257	or die "unexpected eof while reading request";	366	or die "unexpected eof while reading request";
258		367
259	$req = Storable::thaw $req;	368	$req = Storable::thaw $req;
260		369
261	my ($id, $type, @args) = @$req;	370	my ($id, $type, @args) = @$req;
262	my $cb = CFPlus::DB::Server->can ("do_$type")	371	my $cb = DC::DB::Server->can ("do_$type")
263	or die "$type: unknown database request type\n";	372	or die "$type: unknown database request type\n";
264	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	373	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
265	(syswrite $fh, $res) == length $res	374	(syswrite $fh, $res) == length $res
266	or die;	375	or die "DB::write: $!";
267	}	376	}
268	};	377	};
269		378
270	my $error = $@;	379	my $error = $@;
271		380
272	eval {	381	eval {
273	undef %DB_TABLE;
274	undef $DB_ENV;
275
276	Storable::store_fd [die => $error], $fh;	382	Storable::store_fd [die => $error], $fh;
277	};	383	};
278		384
		385	warn $error
		386	if $error;
		387
279	CFPlus::_exit 0;	388	DC::_exit 0;
280	}	389	}
281		390
282	close $fh;	391	close $fh;
283	fcntl $FH, F_SETFL, O_NONBLOCK;	392	DC::fh_nonblocking $FH, 1;
284		393
285	$CB{die} = sub { die shift };	394	$CB{die} = sub { die shift };
286		395
287	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	396	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
		397	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
		398	}
288		399
289	sync_tick;	400	sub stop {
		401	close $FH;
		402	}
		403
		404	package DC::DB;
		405
		406	sub nuke_db {
		407	File::Path::mkpath [$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;
290	}	442	}
291		443
292	1;	444	1;
293		445
294	=back	446	=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 1.35 by root, Sun Mar 30 06:05:52 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 1.35 by root, Sun Mar 30 06:05:52 2008 UTC