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

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.6 by root, Mon Apr 16 21:06:37 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 ();	22	use Storable ();
		23	use Config;
		24	use BDB;
23		25
24	use CFPlus;	26	use DC;
25		27
26	sub sync {	28	our $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
27	# for debugging	29	our $DBDIR = "client-" . BDB::VERSION . "-$Config{archname}";
28	#CFPlus::DB::Server::req (sync => sub { });	30	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
29	CFPlus::DB::Server::sync ();
30	}
31		31
32	sub get($$$) {	32	unless (-d $DB_HOME) {
33	CFPlus::DB::Server::req (get => @_);	33	if (-d "$Deliantra::VARDIR/$ODBDIR") {
34	}	34	rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
35		35	print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
36	sub put($$$$) {	36	} elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
37	CFPlus::DB::Server::req (put => @_);	37	rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
38	}	38	print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
39		39	} else {
40	our $tilemap;	40	File::Path::mkpath [$DB_HOME]
41		41	or die "unable to create database directory $DB_HOME: $!";
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	}	42	}
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	}	43	}
58		44
59	package CFPlus::DB::Server;	45	BDB::max_poll_time 0.03;
		46	BDB::max_parallel 1;
60		47
61	use strict;
62
63	use Fcntl;
64	use BerkeleyDB;
65
66	our $DB_HOME = "$Crossfire::VARDIR/cfplus";
67	our $DB_ENV;	48	our $DB_ENV;
68	our $DB_STATE;	49	our $DB_STATE;
69	our %DB_TABLE;	50	our %DB_TABLE;
		51	our $TILE_SEQ;
70		52
71	sub open_db {	53	sub try_open_db {
72	mkdir $DB_HOME, 0777;	54	File::Path::mkpath [$DB_HOME];
73	my $recover = $BerkeleyDB::db_version >= 4.4	55
74	? 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,
75	: 0;	67	0666;
76		68
77	$DB_ENV = new BerkeleyDB::Env	69	$! 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		70
87	1	71	1
88	}	72	}
89		73
90	sub table($) {	74	sub table($) {
91	$DB_TABLE{$_[0]} \|\|= do {	75	$DB_TABLE{$_[0]} \|\|= do {
92	my ($table) = @_;	76	my ($table) = @_;
93		77
94	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;	78	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
95		79
96	new BerkeleyDB::Btree	80	my $db = db_create $DB_ENV;
97	-Env => $DB_ENV,	81	$db->set_flags (BDB::CHKSUM);
98	-Filename => $table,	82
99	# -Filename => "database",	83	db_open $db, undef, $table, undef, BDB::BTREE,
100	# -Subname => $table,	84	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
101	-Property => DB_CHKSUM,	85
102	-Flags => DB_CREATE \| DB_UPGRADE,	86	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
103	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);
104	}	104	};
105	}	105	}
106		106
107	our $SYNC_INTERVAL = 60;	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;
108		222
109	our %CB;	223	our %CB;
110	our $FH;	224	our $FH;
111	our $ID = "aaa0";	225	our $ID = "aaa0";
112	our ($fh_r_watcher, $fh_w_watcher);	226	our ($fh_r_watcher, $fh_w_watcher);
117	sub fh_write {	231	sub fh_write {
118	my $len = syswrite $FH, $write_buf;	232	my $len = syswrite $FH, $write_buf;
119		233
120	substr $write_buf, 0, $len, "";	234	substr $write_buf, 0, $len, "";
121		235
122	undef $fh_w_watcher	236	$fh_w_watcher->stop
123	unless length $write_buf;	237	unless length $write_buf;
124	}	238	}
125		239
126	sub fh_read {	240	sub fh_read {
127	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	241	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
163		277
164	my $id = ++$ID;	278	my $id = ++$ID;
165	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	279	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
166	$CB{$id} = $cb;	280	$CB{$id} = $cb;
167		281
168	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	282	$fh_w_watcher->start;
169	}	283	}
170		284
171	sub sync_tick {	285	sub do_unlink {
172	req "sync", sub { };	286	unlink $_[0];
173	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
174	}	287	}
175		288
176	sub do_sync {	289	sub do_read_file {
177	$DB_ENV->txn_checkpoint (0, 0, 0);	290	my ($path) = @_;
178	()
179	}
180		291
181	sub do_get {
182	my ($db, $key) = @_;
183
184	utf8::downgrade $key;	292	utf8::downgrade $path;
185	my $data;	293	open my $fh, "<:raw", $path
186	(table $db)->db_get ($key, $data) == 0	294	or return;
187	? $data	295	sysread $fh, my $buf, -s $fh;
188	: ()
189	}
190		296
191	sub do_put {	297	$buf
		298	}
		299
		300	sub do_write_file {
192	my ($db, $key, $data) = @_;	301	my ($path, $data) = @_;
193		302
194	utf8::downgrade $key;	303	utf8::downgrade $path;
195	utf8::downgrade $data;	304	utf8::downgrade $data;
196	(table $db)->db_put ($key => $data)	305	open my $fh, ">:raw", $path
197	}	306	or return;
		307	syswrite $fh, $data;
		308	close $fh;
198		309
199	sub do_table {	310	1
200	my ($db) = @_;
201
202	$db = table $db;
203
204	my $cursor = $db->db_cursor;
205	my %kv;
206	my ($k, $v);
207	$kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
208
209	\%kv
210	}	311	}
211		312
212	sub do_get_tile_id {	313	sub do_prefetch_file {
213	my ($hash) = @_;	314	my ($path, $size) = @_;
214		315
215	my $id;	316	utf8::downgrade $path;
216	my $table = table "facemap";	317	open my $fh, "<:raw", $path
		318	or return;
		319	sysread $fh, my $buf, $size;
217		320
218	return $id	321	1
219	if $table->db_get ($hash, $id) == 0;	322	}
220		323
221	for (1..100) {	324	our %LOG_FH;
222	my $txn = $DB_ENV->txn_begin;
223	my $status = $table->db_get (id => $id);
224	if ($status == 0 \|\| $status == BerkeleyDB::DB_NOTFOUND) {
225	$id = ($id \|\| 64) + 1;
226	if ($table->db_put (id => $id) == 0
227	&& $table->db_put ($hash => $id) == 0) {
228	$txn->txn_commit;
229		325
230	return $id;	326	sub do_logprint {
231	}	327	my ($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
232	}	335	$fh
233	$txn->txn_abort;
234	}	336	};
235		337
236	die "maximum number of transaction retries reached - database problems?";	338	my ($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 $line\n"
237	}	344	}
238		345
239	sub run {	346	sub run {
240	($FH, my $fh) = CFPlus::socketpipe;	347	($FH, my $fh) = DC::socketpipe;
241		348
242	my $oldfh = select $FH; $\| = 1; select $oldfh;	349	my $oldfh = select $FH; $\| = 1; select $oldfh;
243	my $oldfh = select $fh; $\| = 1; select $oldfh;	350	my $oldfh = select $fh; $\| = 1; select $oldfh;
244		351
245	my $pid = fork;	352	my $pid = fork;
246		353
247	if (defined $pid && !$pid) {	354	if (defined $pid && !$pid) {
		355	local $SIG{QUIT} = "IGNORE";
248	local $SIG{__DIE__};	356	local $SIG{__DIE__};
		357	local $SIG{__WARN__};
249	eval {	358	eval {
250	close $FH;	359	close $FH;
251
252	unless (eval { open_db }) {
253	eval { File::Path::rmtree $DB_HOME };
254	open_db;
255	}
256		360
257	while () {	361	while () {
258	4 == read $fh, my $len, 4	362	4 == read $fh, my $len, 4
259	or last;	363	or last;
260	$len = unpack "N", $len;	364	$len = unpack "N", $len;
…		…
262	or die "unexpected eof while reading request";	366	or die "unexpected eof while reading request";
263		367
264	$req = Storable::thaw $req;	368	$req = Storable::thaw $req;
265		369
266	my ($id, $type, @args) = @$req;	370	my ($id, $type, @args) = @$req;
267	my $cb = CFPlus::DB::Server->can ("do_$type")	371	my $cb = DC::DB::Server->can ("do_$type")
268	or die "$type: unknown database request type\n";	372	or die "$type: unknown database request type\n";
269	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	373	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
270	(syswrite $fh, $res) == length $res	374	(syswrite $fh, $res) == length $res
271	or die;	375	or die "DB::write: $!";
272	}	376	}
273	};	377	};
274		378
275	my $error = $@;	379	my $error = $@;
276		380
277	eval {	381	eval {
278	undef %DB_TABLE;
279	undef $DB_ENV;
280
281	Storable::store_fd [die => $error], $fh;	382	Storable::store_fd [die => $error], $fh;
282	};	383	};
283		384
		385	warn $error
		386	if $error;
		387
284	CFPlus::_exit 0;	388	DC::_exit 0;
285	}	389	}
286		390
287	close $fh;	391	close $fh;
288	CFPlus::fh_nonblocking $FH, 1;	392	DC::fh_nonblocking $FH, 1;
289		393
290	$CB{die} = sub { die shift };	394	$CB{die} = sub { die shift };
291		395
292	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	396	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
293		397	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
294	sync_tick;
295	}	398	}
296		399
297	sub stop {	400	sub stop {
298	close $FH;	401	close $FH;
299	}	402	}
300		403
		404	package DC::DB;
		405
		406	sub nuke_db {
		407	File::Path::mkpath [$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
301	1;	444	1;
302		445
303	=back	446	=back
304		447
305	=head1 AUTHOR	448	=head1 AUTHOR

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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents): Revision 1.6 by root, Mon Apr 16 21:06:37 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 1.6 by root, Mon Apr 16 21:06:37 2007 UTC vs.
Revision 1.35 by root, Sun Mar 30 06:05:52 2008 UTC