Storage/Handler/Abstract.pm

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