| 1 |
## ------------------------------------------------------------------------ |
| 2 |
## $Id: Abstract.pm,v 1.16 2003/04/18 16:07:53 joko Exp $ |
| 3 |
## ------------------------------------------------------------------------ |
| 4 |
## $Log: Abstract.pm,v $ |
| 5 |
## Revision 1.16 2003/04/18 16:07:53 joko |
| 6 |
## just use logger if instantiation successed |
| 7 |
## |
| 8 |
## Revision 1.15 2003/02/20 20:19:13 joko |
| 9 |
## tried to get auto-disconnect working again - failed with that |
| 10 |
## |
| 11 |
## Revision 1.14 2003/02/09 05:12:28 joko |
| 12 |
## + quoting of strings used in sql-queries! |
| 13 |
## |
| 14 |
## Revision 1.13 2003/01/30 22:27:05 joko |
| 15 |
## + added new abstract methods |
| 16 |
## |
| 17 |
## Revision 1.12 2003/01/30 21:46:32 joko |
| 18 |
## + fixed behaviour of AUTOLOAD-method |
| 19 |
## |
| 20 |
## Revision 1.11 2003/01/20 16:43:18 joko |
| 21 |
## + better argument-property merging |
| 22 |
## + debugging-output !!! |
| 23 |
## + abstract-dummy 'sub createChildNode' |
| 24 |
## |
| 25 |
## Revision 1.10 2003/01/19 02:31:51 joko |
| 26 |
## + fix to 'sub AUTOLOAD' |
| 27 |
## |
| 28 |
## Revision 1.9 2002/12/19 16:30:23 joko |
| 29 |
## + added 'sub dropDb' and 'sub rebuildDb' as croakers for concrete implementations of methods in proper handlers |
| 30 |
## |
| 31 |
## Revision 1.8 2002/12/13 21:48:35 joko |
| 32 |
## + sub _abstract_function |
| 33 |
## |
| 34 |
## Revision 1.7 2002/12/05 07:57:48 joko |
| 35 |
## + now using Tie::SecureHash as a base for the COREHANDLE |
| 36 |
## + former public COREHANDLE becomes private _COREHANDLE now |
| 37 |
## |
| 38 |
## Revision 1.6 2002/12/03 15:52:24 joko |
| 39 |
## + fix/feature: if dispatching to deep core method fails (is not declared), try method at Data::Storage - level |
| 40 |
## |
| 41 |
## Revision 1.5 2002/12/01 22:19:33 joko |
| 42 |
## + just disconnect if COREHANDLE exists |
| 43 |
## |
| 44 |
## Revision 1.4 2002/12/01 04:45:38 joko |
| 45 |
## + sub eraseAll |
| 46 |
## + sub createDb |
| 47 |
## |
| 48 |
## Revision 1.3 2002/11/29 04:58:20 joko |
| 49 |
## + Storage::Result now uses the same dispatching mechanism like Storage::Handler |
| 50 |
## |
| 51 |
## Revision 1.2 2002/10/17 00:08:07 joko |
| 52 |
## + bugfixes regarding "deep recursion" stuff |
| 53 |
## |
| 54 |
## Revision 1.1 2002/10/10 03:44:07 cvsjoko |
| 55 |
## + new |
| 56 |
## ------------------------------------------------------------------------ |
| 57 |
|
| 58 |
|
| 59 |
package Data::Storage::Handler::Abstract; |
| 60 |
|
| 61 |
use strict; |
| 62 |
use warnings; |
| 63 |
|
| 64 |
use base qw( DesignPattern::Object ); |
| 65 |
|
| 66 |
|
| 67 |
use Data::Dumper; |
| 68 |
use Tie::SecureHash; |
| 69 |
#use Data::Storage::Handler; |
| 70 |
use Hash::Merge qw( merge ); |
| 71 |
|
| 72 |
#use Log::Dispatch::Config; |
| 73 |
#Log::Dispatch::Config->configure(); |
| 74 |
|
| 75 |
# get logger instance |
| 76 |
my $logger; |
| 77 |
eval('$logger = Log::Dispatch::Config->instance;'); |
| 78 |
|
| 79 |
#our $lock_info; |
| 80 |
|
| 81 |
sub new { |
| 82 |
my $invocant = shift; |
| 83 |
my $class = ref($invocant) || $invocant; |
| 84 |
|
| 85 |
# logging info about the actual handler called |
| 86 |
$logger->debug( "$invocant->new( @_ )" ) if $logger; |
| 87 |
#$logger->debug( __PACKAGE__ . "->" . "new()" ); |
| 88 |
|
| 89 |
# V1 - arguments become properties automagically / normal perl mode blessing |
| 90 |
=pod |
| 91 |
# autovivify passed-in arguments as future object attributes into to-be-blessed hash |
| 92 |
my $self = { @_ }; |
| 93 |
# create object from blessed hash-reference |
| 94 |
bless $self, $class; |
| 95 |
=cut |
| 96 |
|
| 97 |
#=pod |
| 98 |
# V2 - maybe more convenient/secure? utilizing Damian Conway's Tie::SecureHash... |
| 99 |
my $self = Tie::SecureHash->new( |
| 100 |
$class, |
| 101 |
# that's it: |
| 102 |
'metainfo' => undef, |
| 103 |
'lock_info' => undef, |
| 104 |
'_COREHANDLE' => undef, |
| 105 |
'meta' => undef, |
| 106 |
'locator' => undef, |
| 107 |
'dataStorageLayer' => undef, |
| 108 |
'dbi' => undef, |
| 109 |
# tries: |
| 110 |
#'Data::Storage::Handler::Abstract::metainfo' => undef, |
| 111 |
#'dataStorageLayer' |
| 112 |
#'Data::Storage::Handler::Abstract::dataStorageLayer' => undef, |
| 113 |
#'Data::Storage::Handler::Tangram::dataStorageLayer' => undef, |
| 114 |
#'Data::Dumper::locator' => undef, |
| 115 |
#$class . '::locator' => undef, |
| 116 |
#'Data::Storage::Handler::Tangram::locator' => undef, |
| 117 |
#'Data::Storage::Handler::DBI::locator' => undef, |
| 118 |
#_protected => , |
| 119 |
#__private => , |
| 120 |
); |
| 121 |
#=cut |
| 122 |
|
| 123 |
# merge passed-in arguments to constructor as properties into already blessed secure object |
| 124 |
|
| 125 |
# mungle arguments from array into hash - perl does the job ;) |
| 126 |
#my %args = @_; |
| 127 |
#my %args = (); |
| 128 |
|
| 129 |
#print Dumper(@_); |
| 130 |
|
| 131 |
# merge attributes one-by-one |
| 132 |
# TODO: deep_copy? / merge_deep? |
| 133 |
while (my $elemName = shift @_) { |
| 134 |
#print "elemName: $elemName", "\n"; |
| 135 |
if (my $elemValue = shift @_) { |
| 136 |
#print Dumper($elemValue); |
| 137 |
#print "elemName=$elemName, elemValue=$elemValue", "\n"; |
| 138 |
$self->{$elemName} = $elemValue; |
| 139 |
} |
| 140 |
#$self->{$_} = $args{$_}; |
| 141 |
#$self->{$_} = $args{$_}; |
| 142 |
} |
| 143 |
|
| 144 |
# V3 - rolling our own security (just for {COREHANDLE} - nothing else) - nope, Tie::SecureHash works wonderful |
| 145 |
#my $self = { @_ }; |
| 146 |
#bless $self, $class; |
| 147 |
|
| 148 |
|
| 149 |
|
| 150 |
# handle meta data |
| 151 |
#my $metainfo = $self->getMetaInfo($class); |
| 152 |
my $metainfo = $self->getMetaInfo(); |
| 153 |
if (!$metainfo->{disconnectMethod}) { $metainfo->{disconnectMethod} = 'disconnect'; } |
| 154 |
# type? |
| 155 |
$invocant =~ s/Data::Storage::Handler:://; |
| 156 |
$metainfo->{type} = $invocant; |
| 157 |
|
| 158 |
# direct accessible (non-protected) properties ( was: my $self = { }; ) |
| 159 |
$self->{metainfo} = $metainfo; |
| 160 |
|
| 161 |
return $self; |
| 162 |
} |
| 163 |
|
| 164 |
|
| 165 |
# TODO: use NEXT.pm inside this mechanism (to avoid repetitions...) |
| 166 |
sub AUTOLOAD { |
| 167 |
|
| 168 |
# recursion problem to be avoided here!!! |
| 169 |
|
| 170 |
# - problem: we get recursion-hangs!!! => perl stops with ... |
| 171 |
# "Deep recursion on subroutine "Data::Storage::Handler::Abstract::AUTOLOAD" at [...]/libs/Data/Storage.pm line 38." |
| 172 |
|
| 173 |
# - when: if we log to ourselves as a storage-implementation (e.g. via Log::Dispatch::Tangram) |
| 174 |
# - why: debug-messages are on a very low level including every data-operation to "Data::Storage(::Handler::X)", |
| 175 |
# so e.g. a "$storage->insert" would trigger another "$storage->insert" itself |
| 176 |
# which leads to a infinite recursion loop (deep recursion) |
| 177 |
# - solution: locks! (by Hack or (maybe) via Perl "local"s) |
| 178 |
|
| 179 |
my $self = shift; |
| 180 |
|
| 181 |
our $AUTOLOAD; |
| 182 |
#return if $AUTOLOAD =~ m/::DESTROY$/; |
| 183 |
|
| 184 |
# find out methodname |
| 185 |
my $methodname = $AUTOLOAD; |
| 186 |
$methodname =~ s/^.*:://; |
| 187 |
|
| 188 |
#print "method: $methodname", "\n"; |
| 189 |
|
| 190 |
# TODO: document this! handler-private methods listed here will not be triggered (internal use) |
| 191 |
# in this case, "exists" is a method reserved for Tie::SecureHash, |
| 192 |
# which encapsulates the perl data structure (HASH) under this object |
| 193 |
# this is to prevent deep recursion's |
| 194 |
return if lc $methodname eq 'exists'; |
| 195 |
|
| 196 |
#print "$methodname - 1", "\n"; |
| 197 |
|
| 198 |
# TODO: enhance logging/debugging |
| 199 |
#if (!$self->exists('COREHANDLE')) { return; } |
| 200 |
|
| 201 |
# handle locking (hack) |
| 202 |
if ($self->can('exists') && $self->exists('lock_info') && $self->{lock_info}->{last_method} && $methodname eq $self->{lock_info}->{last_method}) { |
| 203 |
$self->{lock_info}->{log_lock} = 1; |
| 204 |
} else { |
| 205 |
$self->{lock_info}->{log_lock} = 0; |
| 206 |
} |
| 207 |
$self->{lock_info}->{last_method} = $methodname; |
| 208 |
|
| 209 |
#print "$methodname - 2", "\n"; |
| 210 |
|
| 211 |
#print Dumper($self); |
| 212 |
#exit; |
| 213 |
|
| 214 |
# get corehandle instance from underlying handler |
| 215 |
my $core = $self->getCOREHANDLE(); |
| 216 |
|
| 217 |
# test for COREHANDLE |
| 218 |
#if (!$self->{_COREHANDLE}) { |
| 219 |
#=pod |
| 220 |
#if (!$self->exists('_COREHANDLE')) { |
| 221 |
#if (!$self->{_COREHANDLE}) { |
| 222 |
if (!$core) { |
| 223 |
|
| 224 |
#print Dumper($self); |
| 225 |
#exit; |
| 226 |
|
| 227 |
my $handlertype = $self->{metainfo}->{type}; |
| 228 |
$handlertype ||= ''; |
| 229 |
|
| 230 |
my $err_msg_core = __PACKAGE__ . "[$handlertype]" . ": " . "COREHANDLE is undefined while trying to execute method \"$methodname\""; |
| 231 |
|
| 232 |
#print $err_msg_core, "\n"; |
| 233 |
|
| 234 |
#if ($self->exists('lock_info') && !$self->{lock_info}->{log_lock}) { |
| 235 |
$logger->error( $err_msg_core ); |
| 236 |
#} |
| 237 |
|
| 238 |
return; |
| 239 |
|
| 240 |
} |
| 241 |
#=cut |
| 242 |
|
| 243 |
if (!$methodname) { |
| 244 |
die("Methodname is not defined!"); |
| 245 |
return; |
| 246 |
} |
| 247 |
|
| 248 |
#print "$methodname - 3", "\n"; |
| 249 |
|
| 250 |
# try to dispatch method-call to Storage::Handler::* |
| 251 |
#if ($self->can($methodname)) { |
| 252 |
#$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->" . $methodname . "(@_)" ); |
| 253 |
#my $res = $self->$methodname(@_); |
| 254 |
#if ($res) { return $res; } |
| 255 |
#} |
| 256 |
|
| 257 |
#print "$methodname - 4", "\n"; |
| 258 |
|
| 259 |
# try to dispatch method-call to COREHANDLE |
| 260 |
# was: |
| 261 |
#my $core = $self->{_COREHANDLE}; |
| 262 |
# is: |
| 263 |
#my $core = $self->getCOREHANDLE(); |
| 264 |
|
| 265 |
#print Dumper($core); |
| 266 |
#exit; |
| 267 |
|
| 268 |
# was: |
| 269 |
#if ($self->{_COREHANDLE}->can($methodname) || $self->{_COREHANDLE}->can("AUTOLOAD")) { |
| 270 |
# is: |
| 271 |
if ($core->can($methodname) || $core->can("AUTOLOAD")) { |
| 272 |
#$logger->debug( __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" ); |
| 273 |
#$lock_AUTOLOAD = 1 if ($methodname eq 'insert'); |
| 274 |
if (!$self->{lock_info}->{log_lock}) { |
| 275 |
#print "method: $methodname", "\n"; |
| 276 |
my $type = $self->{metainfo}->{type}; |
| 277 |
$type ||= ''; |
| 278 |
# FIXME! |
| 279 |
#$logger->debug( __PACKAGE__ . "[$type]" . "->" . $methodname . "(@_)" ); |
| 280 |
$logger->debug( __PACKAGE__ . "[$type]" . "->" . $methodname ); |
| 281 |
} else { |
| 282 |
# AUTOLOAD - sub is locked to prevent deep recursions if (e.g.) db-inserts cause log-actions to same db itself |
| 283 |
} |
| 284 |
#$lock_AUTOLOAD = 0; |
| 285 |
#$logger->log( level => 'debug', message => __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" ); |
| 286 |
|
| 287 |
#print "calling: $methodname", "\n"; |
| 288 |
|
| 289 |
# method calls making it until here will get dispatched to the proper handler |
| 290 |
return $core->$methodname(@_); |
| 291 |
|
| 292 |
} elsif ($self->can($methodname)) { |
| 293 |
# try to call specified method inside our or inherited module(s) scope(s) |
| 294 |
return $self->$methodname(@_); |
| 295 |
} |
| 296 |
|
| 297 |
} |
| 298 |
|
| 299 |
sub DESTROY { |
| 300 |
my $self = shift; |
| 301 |
|
| 302 |
return; |
| 303 |
|
| 304 |
$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" ); |
| 305 |
|
| 306 |
my $disconnectMethod = $self->{metainfo}->{disconnectMethod}; |
| 307 |
print "meth: ", $disconnectMethod, "\n"; |
| 308 |
|
| 309 |
#$disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() ); |
| 310 |
$self->{_COREHANDLE}->$disconnectMethod(); |
| 311 |
#$self->$disconnectMethod(); |
| 312 |
|
| 313 |
#my $core1 = $self->getCOREHANDLE() if $self->can('getCOREHANDLE'); |
| 314 |
#$core1->$disconnectMethod(); |
| 315 |
|
| 316 |
return; |
| 317 |
|
| 318 |
print "DESTROY-1", "\n"; |
| 319 |
#if ($self->{__COREHANDLE}) { |
| 320 |
#if ($self->exists('_COREHANDLE')) { |
| 321 |
|
| 322 |
# get corehandle instance from underlying handler |
| 323 |
my $core; |
| 324 |
$core = $self->getCOREHANDLE() if $self->can('getCOREHANDLE'); |
| 325 |
|
| 326 |
#if ($self->{STORAGEHANDLE}) { |
| 327 |
if ($core) { |
| 328 |
print "DESTROY-2", "\n"; |
| 329 |
$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" ); |
| 330 |
|
| 331 |
my $disconnectMethod = $self->{metainfo}->{disconnectMethod}; |
| 332 |
|
| 333 |
# call "disconnect" or alike on COREHANDLE |
| 334 |
# was: $self->{COREHANDLE}->disconnect(); |
| 335 |
$disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() ); |
| 336 |
|
| 337 |
undef $self->{_COREHANDLE}; |
| 338 |
} |
| 339 |
} |
| 340 |
|
| 341 |
sub _typeCheck2 { |
| 342 |
my $type = shift; |
| 343 |
print "type: $type"; |
| 344 |
eval("use Data::Storage::$type;"); |
| 345 |
} |
| 346 |
|
| 347 |
|
| 348 |
# ==================================================== |
| 349 |
# PUBLIC METHODS |
| 350 |
# ==================================================== |
| 351 |
|
| 352 |
sub existsChildNode { |
| 353 |
my $self = shift; |
| 354 |
my $nodename = shift; |
| 355 |
|
| 356 |
# TODO: don't use $self->{meta}->{childnodes} directly in here |
| 357 |
# get it returned from $self->getChildNodes()!!! |
| 358 |
|
| 359 |
$logger->debug( __PACKAGE__ . "->existsChildNode( nodename=$nodename )" ); |
| 360 |
$self->getChildNodes() unless $self->{meta}->{childnodes}; |
| 361 |
|
| 362 |
# quote this, it might contain meta characters which don't work in a regex |
| 363 |
$nodename = quotemeta($nodename); |
| 364 |
|
| 365 |
# trace |
| 366 |
#print Dumper($self->{meta}); |
| 367 |
#print "nodename: $nodename", "\n"; |
| 368 |
|
| 369 |
# FIXME: use "/i" only on win32-systems! |
| 370 |
my $result = grep(m/$nodename/i, @{$self->{meta}->{childnodes}}); |
| 371 |
|
| 372 |
return $result; |
| 373 |
} |
| 374 |
|
| 375 |
sub connect_tmp { |
| 376 |
|
| 377 |
# my $self = shift; |
| 378 |
# my $connectionString = shift; |
| 379 |
# # todo: patch connectionString to $args |
| 380 |
# _typeCheck($self->{args}{type}); |
| 381 |
|
| 382 |
} |
| 383 |
|
| 384 |
|
| 385 |
# ==================================================== |
| 386 |
# CONCRETE METHOD DUMMIES (croaking via "$logger" by calling "_abstract_function") |
| 387 |
# ==================================================== |
| 388 |
|
| 389 |
# TODO: |
| 390 |
# - abstract "abstract methods" to list/hash to be used in AUTOLOAD |
| 391 |
# e.g.: my @ABSTRACT_METHODS = (qw( connect sendCommand getChildNodes )); |
| 392 |
# use Class::XYZ (Construct) |
| 393 |
# - build them via anonymous subs |
| 394 |
# - introduce them via symbols |
| 395 |
|
| 396 |
sub getCOREHANDLE { |
| 397 |
my $self = shift; |
| 398 |
$self->_abstract_function('getCOREHANDLE'); |
| 399 |
} |
| 400 |
|
| 401 |
sub sendCommand { |
| 402 |
my $self = shift; |
| 403 |
$self->_abstract_function('sendCommand'); |
| 404 |
} |
| 405 |
|
| 406 |
sub createChildNode { |
| 407 |
my $self = shift; |
| 408 |
$self->_abstract_function('createChildNode'); |
| 409 |
} |
| 410 |
|
| 411 |
sub existsChildNode_tmp { |
| 412 |
my $self = shift; |
| 413 |
$self->_abstract_function('existsChildNode'); |
| 414 |
} |
| 415 |
|
| 416 |
sub getChildNodes { |
| 417 |
my $self = shift; |
| 418 |
$self->_abstract_function('getChildNodes'); |
| 419 |
} |
| 420 |
|
| 421 |
sub configureCOREHANDLE { |
| 422 |
my $self = shift; |
| 423 |
$self->_abstract_function('configureCOREHANDLE'); |
| 424 |
} |
| 425 |
|
| 426 |
sub getMetaInfo { |
| 427 |
my $self = shift; |
| 428 |
$self->_abstract_function('getMetaInfo'); |
| 429 |
return; |
| 430 |
} |
| 431 |
|
| 432 |
sub getListUnfiltered { |
| 433 |
my $self = shift; |
| 434 |
$self->_abstract_function('getListUnfiltered'); |
| 435 |
return; |
| 436 |
} |
| 437 |
|
| 438 |
sub getListFiltered { |
| 439 |
my $self = shift; |
| 440 |
$self->_abstract_function('getListFiltered'); |
| 441 |
return; |
| 442 |
} |
| 443 |
|
| 444 |
sub sendQuery { |
| 445 |
my $self = shift; |
| 446 |
$self->_abstract_function('sendQuery'); |
| 447 |
return; |
| 448 |
} |
| 449 |
|
| 450 |
sub connect { |
| 451 |
my $self = shift; |
| 452 |
$self->_abstract_function('connect'); |
| 453 |
return; |
| 454 |
} |
| 455 |
|
| 456 |
sub testIntegrity { |
| 457 |
my $self = shift; |
| 458 |
$self->_abstract_function('testIntegrity'); |
| 459 |
return; |
| 460 |
} |
| 461 |
|
| 462 |
sub quoteSql { |
| 463 |
my $self = shift; |
| 464 |
$self->_abstract_function('quoteSql'); |
| 465 |
return; |
| 466 |
} |
| 467 |
|
| 468 |
sub eraseAll { |
| 469 |
my $self = shift; |
| 470 |
$self->_abstract_function('eraseAll'); |
| 471 |
return; |
| 472 |
} |
| 473 |
|
| 474 |
sub createDb { |
| 475 |
my $self = shift; |
| 476 |
$self->_abstract_function('createDb'); |
| 477 |
return; |
| 478 |
} |
| 479 |
|
| 480 |
sub dropDb { |
| 481 |
my $self = shift; |
| 482 |
$self->_abstract_function('dropDb'); |
| 483 |
return; |
| 484 |
} |
| 485 |
|
| 486 |
sub rebuildDb { |
| 487 |
my $self = shift; |
| 488 |
$self->_abstract_function('rebuildDb'); |
| 489 |
return; |
| 490 |
} |
| 491 |
|
| 492 |
sub getDbName { |
| 493 |
my $self = shift; |
| 494 |
$self->_abstract_function('getDbName'); |
| 495 |
return; |
| 496 |
} |
| 497 |
|
| 498 |
sub testAvailability { |
| 499 |
my $self = shift; |
| 500 |
$self->_abstract_function('testAvailability'); |
| 501 |
return; |
| 502 |
} |
| 503 |
|
| 504 |
sub isConnected { |
| 505 |
my $self = shift; |
| 506 |
$self->_abstract_function('isConnected'); |
| 507 |
return; |
| 508 |
} |
| 509 |
|
| 510 |
sub testDsn { |
| 511 |
my $self = shift; |
| 512 |
$self->_abstract_function('testDsn'); |
| 513 |
return; |
| 514 |
} |
| 515 |
|
| 516 |
1; |
Parent Directory
| 
Revision Log
