Storage/Handler/Abstract.pm

##    ------------------------------------------------------------------------
##    $Id: Abstract.pm,v 1.13 2003/01/30 22:27:05 joko Exp $
##    ------------------------------------------------------------------------
##    $Log: Abstract.pm,v $
##    Revision 1.13  2003/01/30 22:27:05  joko
##    + added new abstract methods
##
##    Revision 1.12  2003/01/30 21:46:32  joko
##    + fixed behaviour of AUTOLOAD-method
##
##    Revision 1.11  2003/01/20 16:43:18  joko
##    + better argument-property merging
##    + debugging-output !!!
##    + abstract-dummy 'sub createChildNode'
##
##    Revision 1.10  2003/01/19 02:31:51  joko
##    + fix to 'sub AUTOLOAD'
##
##    Revision 1.9  2002/12/19 16:30:23  joko
##    + added 'sub dropDb' and 'sub rebuildDb' as croakers for concrete implementations of methods in proper handlers
##
##    Revision 1.8  2002/12/13 21:48:35  joko
##    + sub _abstract_function
##
##    Revision 1.7  2002/12/05 07:57:48  joko
##    + now using Tie::SecureHash as a base for the COREHANDLE
##    + former public COREHANDLE becomes private _COREHANDLE now
##
##    Revision 1.6  2002/12/03 15:52:24  joko
##    + fix/feature: if dispatching to deep core method fails (is not declared), try method at Data::Storage - level
##
##    Revision 1.5  2002/12/01 22:19:33  joko
##    + just disconnect if COREHANDLE exists
##
##    Revision 1.4  2002/12/01 04:45:38  joko
##    + sub eraseAll
##    + sub createDb
##
##    Revision 1.3  2002/11/29 04:58:20  joko
##    + Storage::Result now uses the same dispatching mechanism like Storage::Handler
##
##    Revision 1.2  2002/10/17 00:08:07  joko
##    + bugfixes regarding "deep recursion" stuff
##
##    Revision 1.1  2002/10/10 03:44:07  cvsjoko
##    + new
##    ------------------------------------------------------------------------


package Data::Storage::Handler::Abstract;

use strict;
use warnings;

use base qw( DesignPattern::Object );


use Data::Dumper;
use Tie::SecureHash;
#use Data::Storage::Handler;
use Data::Transform::Deep qw( merge );


# get logger instance
my $logger = Log::Dispatch::Config->instance;

#our $lock_info;

sub new {
  my $invocant = shift;
  my $class = ref($invocant) || $invocant;
  
  # logging info about the actual handler called
    $logger->debug( "$invocant->new( @_ )" );
    #$logger->debug( __PACKAGE__ . "->" . "new()" );

  # V1 - arguments become properties automagically / normal perl mode blessing
=pod
  # autovivify passed-in arguments as future object attributes into to-be-blessed hash
  my $self = { @_ };
  # create object from blessed hash-reference
  bless $self, $class;
=cut

#=pod
  # V2 - maybe more convenient/secure? utilizing Damian Conway's Tie::SecureHash...
  my $self = Tie::SecureHash->new(
    $class,
    # that's it:
      'metainfo' => undef,
      'lock_info' => undef,
      '_COREHANDLE' => undef,
      'meta' => undef,
      'locator' => undef,
      'dataStorageLayer' => undef,
      'dbi' => undef,
    # tries:
      #'Data::Storage::Handler::Abstract::metainfo' => undef,
      #'dataStorageLayer'
      #'Data::Storage::Handler::Abstract::dataStorageLayer' => undef,
      #'Data::Storage::Handler::Tangram::dataStorageLayer' => undef,
      #'Data::Dumper::locator' => undef,
      #$class . '::locator' => undef,
      #'Data::Storage::Handler::Tangram::locator' => undef,
      #'Data::Storage::Handler::DBI::locator' => undef,
      #_protected => ,
      #__private => ,
  );
#=cut

  # merge passed-in arguments to constructor as properties into already blessed secure object

    # mungle arguments from array into hash - perl does the job  ;)
    #my %args = @_;
    #my %args = ();

#print Dumper(@_);

    # merge attributes one-by-one
    # TODO: deep_copy? / merge_deep?
    while (my $elemName = shift @_) {
      #print "elemName: $elemName", "\n";
      if (my $elemValue = shift @_) {
        #print Dumper($elemValue);
        #print "elemName=$elemName, elemValue=$elemValue", "\n";
        $self->{$elemName} = $elemValue;
      }
      #$self->{$_} = $args{$_};
      #$self->{$_} = $args{$_};
    }
  
  # V3 - rolling our own security (just for {COREHANDLE} - nothing else)  -  nope, Tie::SecureHash works wonderful
  #my $self = { @_ };
  #bless $self, $class;
  
  
  # handle meta data
    #my $metainfo = $self->getMetaInfo($class);
    my $metainfo = $self->getMetaInfo();
    if (!$metainfo->{disconnectMethod}) { $metainfo->{disconnectMethod} = 'disconnect'; }
    # type?
    $invocant =~ s/Data::Storage::Handler:://;
    $metainfo->{type} = $invocant;

    # direct accessible (non-protected) properties         ( was: my $self = { }; )
    $self->{metainfo} = $metainfo;

  return $self;
}


# TODO: use NEXT.pm inside this mechanism (to avoid repetitions...)
sub AUTOLOAD {

  # recursion problem to be avoided here!!!
  
    # - problem: we get recursion-hangs!!!   =>  perl stops with ...
    # "Deep recursion on subroutine "Data::Storage::Handler::Abstract::AUTOLOAD" at [...]/libs/Data/Storage.pm line 38."
    
    # - when: if we log to ourselves as a storage-implementation (e.g. via Log::Dispatch::Tangram)
    # - why:  debug-messages are on a very low level including every data-operation to "Data::Storage(::Handler::X)",
    #             so e.g. a "$storage->insert" would trigger another "$storage->insert" itself 
    #             which leads to a infinite recursion loop (deep recursion)
    # - solution: locks! (by Hack or (maybe) via Perl "local"s)

  my $self = shift;

  our $AUTOLOAD;
  #return if $AUTOLOAD =~ m/::DESTROY$/;

  # find out methodname
  my $methodname = $AUTOLOAD;
  $methodname =~ s/^.*:://;
  
#print "method: $methodname", "\n";
  
  # TODO: document this! handler-private methods listed here will not be triggered (internal use)
  # in this case, "exists" is a method reserved for Tie::SecureHash,
  # which encapsulates the perl data structure (HASH) under this object
  # this is to prevent deep recursion's
  return if lc $methodname eq 'exists';

#print "$methodname - 1", "\n";

  # TODO: enhance logging/debugging
  #if (!$self->exists('COREHANDLE')) { return; }

  # handle locking (hack)
  if ($self->can('exists') && $self->exists('lock_info') && $self->{lock_info}->{last_method} && $methodname eq $self->{lock_info}->{last_method}) {
    $self->{lock_info}->{log_lock} = 1;
  } else {
    $self->{lock_info}->{log_lock} = 0;
  }
  $self->{lock_info}->{last_method} = $methodname;
  
#print "$methodname - 2", "\n";

#print Dumper($self);
#exit;

  # get corehandle instance from underlying handler
  my $core = $self->getCOREHANDLE();

  # test for COREHANDLE
  #if (!$self->{_COREHANDLE}) {
#=pod
  #if (!$self->exists('_COREHANDLE')) {
  #if (!$self->{_COREHANDLE}) {
  if (!$core) {

#print Dumper($self);    
#exit;

    my $handlertype = $self->{metainfo}->{type};
    $handlertype ||= '';

    my $err_msg_core = __PACKAGE__ . "[$handlertype]" . ": " . "COREHANDLE is undefined while trying to execute method \"$methodname\"";

#print $err_msg_core, "\n";

    #if ($self->exists('lock_info') && !$self->{lock_info}->{log_lock}) {
      $logger->error( $err_msg_core );
    #}

    return;
    
  }
#=cut

#print "$methodname - 3", "\n";

  # try to dispatch method-call to Storage::Handler::*
  #if ($self->can($methodname)) {
    #$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->" . $methodname . "(@_)" );
    #my $res = $self->$methodname(@_);
    #if ($res) { return $res; }
  #}

#print "$methodname - 4", "\n";

  # try to dispatch method-call to COREHANDLE
  # was:
  #my $core = $self->{_COREHANDLE};
  # is:
  #my $core = $self->getCOREHANDLE();

#print Dumper($core);
#exit;

  # was:
  #if ($self->{_COREHANDLE}->can($methodname) || $self->{_COREHANDLE}->can("AUTOLOAD")) {
  # is:
  if ($core->can($methodname) || $core->can("AUTOLOAD")) {
    #$logger->debug( __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" );
    #$lock_AUTOLOAD = 1 if ($methodname eq 'insert');
    if (!$self->{lock_info}->{log_lock}) {
      #print "method: $methodname", "\n";
      $logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->" . $methodname . "(@_)" );
    } else {
      # AUTOLOAD - sub is locked to prevent deep recursions if (e.g.) db-inserts cause log-actions to same db itself
    }
    #$lock_AUTOLOAD = 0;
    #$logger->log( level => 'debug', message => __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" );
    
#print "calling: $methodname", "\n";
    
    # method calls making it until here will get dispatched to the proper handler
    return $core->$methodname(@_);
  
  } elsif ($self->can($methodname)) {
    # try to call specified method inside our or inherited module(s) scope(s)
    return $self->$methodname(@_);
  }

}

sub DESTROY {
  my $self = shift;
  #if ($self->{COREHANDLE}) {
  if ($self->exists('_COREHANDLE')) {
    $logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" );

    my $disconnectMethod = $self->{metainfo}->{disconnectMethod};

    # call "disconnect" or alike on COREHANDLE
    # was: $self->{COREHANDLE}->disconnect();
    $disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() );

    undef $self->{_COREHANDLE};
  }
}

sub _typeCheck2 {
  my $type = shift;
  print "type: $type";
  eval("use Data::Storage::$type;");
}


# ====================================================
#   PUBLIC METHODS
# ====================================================

  sub existsChildNode {
    my $self = shift;
    my $nodename = shift;

    # TODO: don't use $self->{meta}->{childnodes} directly in here
    # get it returned from $self->getChildNodes()!!!

    $logger->debug( __PACKAGE__ . "->existsChildNode( nodename=$nodename )" );
    $self->getChildNodes() unless $self->{meta}->{childnodes};

    # quote this, it might contain meta characters which don't work in a regex
      $nodename = quotemeta($nodename);

    # trace
      #print Dumper($self->{meta});
      #print "nodename: $nodename", "\n";
    
    # FIXME: use "/i" only on win32-systems!
    my $result = grep(m/$nodename/i, @{$self->{meta}->{childnodes}});
    
    return $result;
  }

  sub connect_tmp {
    
#    my $self = shift;
#    my $connectionString = shift;
#    # todo: patch connectionString to $args
#    _typeCheck($self->{args}{type});

  }
  

# ====================================================
#   CONCRETE METHOD DUMMIES (croaking via "$logger" by calling "_abstract_function")
# ====================================================

  # TODO:
  #   - abstract "abstract methods" to list/hash to be used in AUTOLOAD
  #      e.g.: my @ABSTRACT_METHODS = (qw( connect sendCommand getChildNodes ));
  #      use Class::XYZ (Construct)
  #   - build them via anonymous subs 
  #   - introduce them via symbols

  sub getCOREHANDLE {
    my $self = shift;
    $self->_abstract_function('getCOREHANDLE');
  }

  sub sendCommand {
    my $self = shift;
    $self->_abstract_function('sendCommand');
  }

  sub createChildNode {
    my $self = shift;
    $self->_abstract_function('createChildNode');
  }

  sub existsChildNode_tmp {
    my $self = shift;
    $self->_abstract_function('existsChildNode');
  }

  sub getChildNodes {
    my $self = shift;
    $self->_abstract_function('getChildNodes');
  }

  sub configureCOREHANDLE {
    my $self = shift;
    $self->_abstract_function('configureCOREHANDLE');
  }

  sub getMetaInfo {
    my $self = shift;
    $self->_abstract_function('getMetaInfo');
    return;
  }

  sub getListUnfiltered {
    my $self = shift;
    $self->_abstract_function('getListUnfiltered');
    return;
  }

  sub getListFiltered {
    my $self = shift;
    $self->_abstract_function('getListFiltered');
    return;
  }

  sub sendQuery {
    my $self = shift;
    $self->_abstract_function('sendQuery');
    return;
  }

  sub connect {
    my $self = shift;
    $self->_abstract_function('connect');
    return;
  }

  sub testIntegrity {
    my $self = shift;
    $self->_abstract_function('testIntegrity');
    return;
  }

  sub quoteSql {
    my $self = shift;
    $self->_abstract_function('quoteSql');
    return;
  }

  sub eraseAll {
    my $self = shift;
    $self->_abstract_function('eraseAll');
    return;
  }

  sub createDb {
    my $self = shift;
    $self->_abstract_function('createDb');
    return;
  }

  sub dropDb {
    my $self = shift;
    $self->_abstract_function('dropDb');
    return;
  }

  sub rebuildDb {
    my $self = shift;
    $self->_abstract_function('rebuildDb');
    return;
  }

  sub getDbName {
    my $self = shift;
    $self->_abstract_function('getDbName');
    return;
  }

  sub testAvailability {
    my $self = shift;
    $self->_abstract_function('testAvailability');
    return;
  }

  sub isConnected {
    my $self = shift;
    $self->_abstract_function('isConnected');
    return;
  }

  sub testDsn {
    my $self = shift;
    $self->_abstract_function('testDsn');
    return;
  }

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