Storage/Handler/Abstract.pm

##    ------------------------------------------------------------------------
##    $Id: Abstract.pm,v 1.17 2003/05/13 07:58:49 joko Exp $
##    ------------------------------------------------------------------------
##    $Log: Abstract.pm,v $
##    Revision 1.17  2003/05/13 07:58:49  joko
##    fix: die if methodname is empty
##    fixes to log-string
##
##    Revision 1.16  2003/04/18 16:07:53  joko
##    just use logger if instantiation successed
##
##    Revision 1.15  2003/02/20 20:19:13  joko
##    tried to get auto-disconnect working again - failed with that
##
##    Revision 1.14  2003/02/09 05:12:28  joko
##    + quoting of strings used in sql-queries!
##
##    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 Hash::Merge qw( merge );

#use Log::Dispatch::Config;
#Log::Dispatch::Config->configure();

# get logger instance
my $logger;
eval('$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( @_ )" ) if $logger;
    #$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

=pod
  if (!$methodname) {
    die("Methodname is not defined!");
    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";
      my $type = $self->{metainfo}->{type};
      $type ||= '';
      # FIXME!
      #$logger->debug( __PACKAGE__ . "[$type]" . "->" . $methodname . "(@_)" );
      $logger->debug( __PACKAGE__ . "[$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;

return;

  $logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" );

  my $disconnectMethod = $self->{metainfo}->{disconnectMethod};
  print "meth: ", $disconnectMethod, "\n";
  
  #$disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() );
  $self->{_COREHANDLE}->$disconnectMethod();
  #$self->$disconnectMethod();

  #my $core1 = $self->getCOREHANDLE() if $self->can('getCOREHANDLE');
  #$core1->$disconnectMethod();

return;

  print "DESTROY-1", "\n";
  #if ($self->{__COREHANDLE}) {
  #if ($self->exists('_COREHANDLE')) {

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

  #if ($self->{STORAGEHANDLE}) {
  if ($core) {
    print "DESTROY-2", "\n";
    $logger->debug( __PACKAGE__ . "[$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	1.18	## $Id: Abstract.pm,v 1.17 2003/05/13 07:58:49 joko Exp $
3	joko	1.11	## ------------------------------------------------------------------------
4	joko	1.7	## $Log: Abstract.pm,v $
5	joko	1.18	## Revision 1.17 2003/05/13 07:58:49 joko
6			## fix: die if methodname is empty
7			## fixes to log-string
8			##
9	joko	1.17	## Revision 1.16 2003/04/18 16:07:53 joko
10			## just use logger if instantiation successed
11			##
12	joko	1.16	## Revision 1.15 2003/02/20 20:19:13 joko
13			## tried to get auto-disconnect working again - failed with that
14			##
15	joko	1.15	## Revision 1.14 2003/02/09 05:12:28 joko
16			## + quoting of strings used in sql-queries!
17			##
18	joko	1.14	## Revision 1.13 2003/01/30 22:27:05 joko
19			## + added new abstract methods
20			##
21	joko	1.13	## Revision 1.12 2003/01/30 21:46:32 joko
22			## + fixed behaviour of AUTOLOAD-method
23			##
24	joko	1.12	## Revision 1.11 2003/01/20 16:43:18 joko
25			## + better argument-property merging
26			## + debugging-output !!!
27			## + abstract-dummy 'sub createChildNode'
28			##
29	joko	1.11	## Revision 1.10 2003/01/19 02:31:51 joko
30			## + fix to 'sub AUTOLOAD'
31			##
32	joko	1.10	## Revision 1.9 2002/12/19 16:30:23 joko
33			## + added 'sub dropDb' and 'sub rebuildDb' as croakers for concrete implementations of methods in proper handlers
34			##
35	joko	1.9	## Revision 1.8 2002/12/13 21:48:35 joko
36			## + sub _abstract_function
37			##
38	joko	1.8	## Revision 1.7 2002/12/05 07:57:48 joko
39			## + now using Tie::SecureHash as a base for the COREHANDLE
40			## + former public COREHANDLE becomes private _COREHANDLE now
41			##
42	joko	1.7	## Revision 1.6 2002/12/03 15:52:24 joko
43			## + fix/feature: if dispatching to deep core method fails (is not declared), try method at Data::Storage - level
44			##
45			## Revision 1.5 2002/12/01 22:19:33 joko
46			## + just disconnect if COREHANDLE exists
47			##
48			## Revision 1.4 2002/12/01 04:45:38 joko
49			## + sub eraseAll
50			## + sub createDb
51			##
52			## Revision 1.3 2002/11/29 04:58:20 joko
53			## + Storage::Result now uses the same dispatching mechanism like Storage::Handler
54			##
55			## Revision 1.2 2002/10/17 00:08:07 joko
56			## + bugfixes regarding "deep recursion" stuff
57			##
58			## Revision 1.1 2002/10/10 03:44:07 cvsjoko
59			## + new
60	joko	1.11	## ------------------------------------------------------------------------
61	joko	1.7
62	cvsjoko	1.1
63			package Data::Storage::Handler::Abstract;
64
65			use strict;
66			use warnings;
67
68	joko	1.8	use base qw( DesignPattern::Object );
69
70	joko	1.11
71	cvsjoko	1.1	use Data::Dumper;
72	joko	1.7	use Tie::SecureHash;
73			#use Data::Storage::Handler;
74	joko	1.15	use Hash::Merge qw( merge );
75	joko	1.11
76	joko	1.16	#use Log::Dispatch::Config;
77			#Log::Dispatch::Config->configure();
78	cvsjoko	1.1
79			# get logger instance
80	joko	1.16	my $logger;
81			eval('$logger = Log::Dispatch::Config->instance;');
82	cvsjoko	1.1
83			#our $lock_info;
84
85			sub new {
86			my $invocant = shift;
87			my $class = ref($invocant) \|\| $invocant;
88
89			# logging info about the actual handler called
90	joko	1.16	$logger->debug( "$invocant->new( @_ )" ) if $logger;
91	joko	1.2	#$logger->debug( __PACKAGE__ . "->" . "new()" );
92	cvsjoko	1.1
93	joko	1.7	# V1 - arguments become properties automagically / normal perl mode blessing
94			=pod
95			# autovivify passed-in arguments as future object attributes into to-be-blessed hash
96	joko	1.3	my $self = { @_ };
97			# create object from blessed hash-reference
98			bless $self, $class;
99	joko	1.7	=cut
100
101	joko	1.10	#=pod
102	joko	1.7	# V2 - maybe more convenient/secure? utilizing Damian Conway's Tie::SecureHash...
103			my $self = Tie::SecureHash->new(
104			$class,
105			# that's it:
106			'metainfo' => undef,
107			'lock_info' => undef,
108			'_COREHANDLE' => undef,
109			'meta' => undef,
110			'locator' => undef,
111			'dataStorageLayer' => undef,
112			'dbi' => undef,
113			# tries:
114			#'Data::Storage::Handler::Abstract::metainfo' => undef,
115			#'dataStorageLayer'
116			#'Data::Storage::Handler::Abstract::dataStorageLayer' => undef,
117			#'Data::Storage::Handler::Tangram::dataStorageLayer' => undef,
118			#'Data::Dumper::locator' => undef,
119			#$class . '::locator' => undef,
120			#'Data::Storage::Handler::Tangram::locator' => undef,
121			#'Data::Storage::Handler::DBI::locator' => undef,
122			#_protected => ,
123			#__private => ,
124			);
125	joko	1.10	#=cut
126	joko	1.7
127			# merge passed-in arguments to constructor as properties into already blessed secure object
128	joko	1.11
129	joko	1.7	# mungle arguments from array into hash - perl does the job ;)
130	joko	1.11	#my %args = @_;
131			#my %args = ();
132
133			#print Dumper(@_);
134
135	joko	1.7	# merge attributes one-by-one
136			# TODO: deep_copy? / merge_deep?
137	joko	1.11	while (my $elemName = shift @_) {
138			#print "elemName: $elemName", "\n";
139			if (my $elemValue = shift @_) {
140			#print Dumper($elemValue);
141			#print "elemName=$elemName, elemValue=$elemValue", "\n";
142			$self->{$elemName} = $elemValue;
143			}
144			#$self->{$_} = $args{$_};
145			#$self->{$_} = $args{$_};
146	joko	1.7	}
147
148			# V3 - rolling our own security (just for {COREHANDLE} - nothing else) - nope, Tie::SecureHash works wonderful
149			#my $self = { @_ };
150			#bless $self, $class;
151
152
153	joko	1.3
154	cvsjoko	1.1	# handle meta data
155	joko	1.3	#my $metainfo = $self->getMetaInfo($class);
156			my $metainfo = $self->getMetaInfo();
157	cvsjoko	1.1	if (!$metainfo->{disconnectMethod}) { $metainfo->{disconnectMethod} = 'disconnect'; }
158			# type?
159			$invocant =~ s/Data::Storage::Handler:://;
160			$metainfo->{type} = $invocant;
161
162			# direct accessible (non-protected) properties ( was: my $self = { }; )
163	joko	1.3	$self->{metainfo} = $metainfo;
164	cvsjoko	1.1
165			return $self;
166			}
167
168
169	joko	1.10	# TODO: use NEXT.pm inside this mechanism (to avoid repetitions...)
170	cvsjoko	1.1	sub AUTOLOAD {
171
172			# recursion problem to be avoided here!!!
173
174			# - problem: we get recursion-hangs!!! => perl stops with ...
175			# "Deep recursion on subroutine "Data::Storage::Handler::Abstract::AUTOLOAD" at [...]/libs/Data/Storage.pm line 38."
176
177			# - when: if we log to ourselves as a storage-implementation (e.g. via Log::Dispatch::Tangram)
178			# - why: debug-messages are on a very low level including every data-operation to "Data::Storage(::Handler::X)",
179			# so e.g. a "$storage->insert" would trigger another "$storage->insert" itself
180			# which leads to a infinite recursion loop (deep recursion)
181	joko	1.2	# - solution: locks! (by Hack or (maybe) via Perl "local"s)
182	cvsjoko	1.1
183			my $self = shift;
184
185			our $AUTOLOAD;
186			#return if $AUTOLOAD =~ m/::DESTROY$/;
187
188			# find out methodname
189			my $methodname = $AUTOLOAD;
190			$methodname =~ s/^.*:://;
191	joko	1.7
192			#print "method: $methodname", "\n";
193
194			# TODO: document this! handler-private methods listed here will not be triggered (internal use)
195			# in this case, "exists" is a method reserved for Tie::SecureHash,
196			# which encapsulates the perl data structure (HASH) under this object
197			# this is to prevent deep recursion's
198			return if lc $methodname eq 'exists';
199
200	joko	1.12	#print "$methodname - 1", "\n";
201	joko	1.7
202			# TODO: enhance logging/debugging
203			#if (!$self->exists('COREHANDLE')) { return; }
204	cvsjoko	1.1
205			# handle locking (hack)
206	joko	1.10	if ($self->can('exists') && $self->exists('lock_info') && $self->{lock_info}->{last_method} && $methodname eq $self->{lock_info}->{last_method}) {
207	cvsjoko	1.1	$self->{lock_info}->{log_lock} = 1;
208			} else {
209			$self->{lock_info}->{log_lock} = 0;
210			}
211			$self->{lock_info}->{last_method} = $methodname;
212
213	joko	1.12	#print "$methodname - 2", "\n";
214	joko	1.7
215			#print Dumper($self);
216			#exit;
217
218			# get corehandle instance from underlying handler
219			my $core = $self->getCOREHANDLE();
220
221	cvsjoko	1.1	# test for COREHANDLE
222	joko	1.7	#if (!$self->{_COREHANDLE}) {
223			#=pod
224			#if (!$self->exists('_COREHANDLE')) {
225			#if (!$self->{_COREHANDLE}) {
226			if (!$core) {
227	joko	1.10
228			#print Dumper($self);
229			#exit;
230
231			my $handlertype = $self->{metainfo}->{type};
232			$handlertype \|\|= '';
233
234			my $err_msg_core = __PACKAGE__ . "[$handlertype]" . ": " . "COREHANDLE is undefined while trying to execute method \"$methodname\"";
235	joko	1.12
236			#print $err_msg_core, "\n";
237
238			#if ($self->exists('lock_info') && !$self->{lock_info}->{log_lock}) {
239	joko	1.7	$logger->error( $err_msg_core );
240	joko	1.12	#}
241
242	cvsjoko	1.1	return;
243	joko	1.12
244	cvsjoko	1.1	}
245	joko	1.7	#=cut
246
247	joko	1.18	=pod
248	joko	1.17	if (!$methodname) {
249			die("Methodname is not defined!");
250			return;
251			}
252	joko	1.18	=cut
253	joko	1.17
254	joko	1.7	#print "$methodname - 3", "\n";
255	cvsjoko	1.1
256			# try to dispatch method-call to Storage::Handler::*
257			#if ($self->can($methodname)) {
258			#$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->" . $methodname . "(@_)" );
259			#my $res = $self->$methodname(@_);
260			#if ($res) { return $res; }
261			#}
262
263	joko	1.7	#print "$methodname - 4", "\n";
264
265	cvsjoko	1.1	# try to dispatch method-call to COREHANDLE
266	joko	1.7	# was:
267			#my $core = $self->{_COREHANDLE};
268			# is:
269			#my $core = $self->getCOREHANDLE();
270
271			#print Dumper($core);
272			#exit;
273
274			# was:
275			#if ($self->{_COREHANDLE}->can($methodname) \|\| $self->{_COREHANDLE}->can("AUTOLOAD")) {
276			# is:
277			if ($core->can($methodname) \|\| $core->can("AUTOLOAD")) {
278	cvsjoko	1.1	#$logger->debug( __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" );
279			#$lock_AUTOLOAD = 1 if ($methodname eq 'insert');
280			if (!$self->{lock_info}->{log_lock}) {
281			#print "method: $methodname", "\n";
282	joko	1.17	my $type = $self->{metainfo}->{type};
283			$type \|\|= '';
284			# FIXME!
285			#$logger->debug( __PACKAGE__ . "[$type]" . "->" . $methodname . "(@_)" );
286			$logger->debug( __PACKAGE__ . "[$type]" . "->" . $methodname );
287	cvsjoko	1.1	} else {
288			# AUTOLOAD - sub is locked to prevent deep recursions if (e.g.) db-inserts cause log-actions to same db itself
289			}
290			#$lock_AUTOLOAD = 0;
291			#$logger->log( level => 'debug', message => __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" );
292	joko	1.3
293	joko	1.7	#print "calling: $methodname", "\n";
294
295	joko	1.10	# method calls making it until here will get dispatched to the proper handler
296	joko	1.7	return $core->$methodname(@_);
297	joko	1.6
298			} elsif ($self->can($methodname)) {
299	joko	1.10	# try to call specified method inside our or inherited module(s) scope(s)
300	joko	1.6	return $self->$methodname(@_);
301	cvsjoko	1.1	}
302
303			}
304
305			sub DESTROY {
306			my $self = shift;
307	joko	1.15
308			return;
309
310			$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" );
311
312			my $disconnectMethod = $self->{metainfo}->{disconnectMethod};
313			print "meth: ", $disconnectMethod, "\n";
314
315			#$disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() );
316			$self->{_COREHANDLE}->$disconnectMethod();
317			#$self->$disconnectMethod();
318
319			#my $core1 = $self->getCOREHANDLE() if $self->can('getCOREHANDLE');
320			#$core1->$disconnectMethod();
321
322			return;
323
324			print "DESTROY-1", "\n";
325			#if ($self->{__COREHANDLE}) {
326			#if ($self->exists('_COREHANDLE')) {
327
328			# get corehandle instance from underlying handler
329			my $core;
330			$core = $self->getCOREHANDLE() if $self->can('getCOREHANDLE');
331
332			#if ($self->{STORAGEHANDLE}) {
333			if ($core) {
334			print "DESTROY-2", "\n";
335	cvsjoko	1.1	$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" );
336
337			my $disconnectMethod = $self->{metainfo}->{disconnectMethod};
338
339			# call "disconnect" or alike on COREHANDLE
340			# was: $self->{COREHANDLE}->disconnect();
341	joko	1.7	$disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() );
342	cvsjoko	1.1
343	joko	1.7	undef $self->{_COREHANDLE};
344	cvsjoko	1.1	}
345			}
346
347	joko	1.7	sub _typeCheck2 {
348	cvsjoko	1.1	my $type = shift;
349			print "type: $type";
350			eval("use Data::Storage::$type;");
351			}
352
353
354			# ====================================================
355			# PUBLIC METHODS
356			# ====================================================
357
358	joko	1.3	sub existsChildNode {
359			my $self = shift;
360			my $nodename = shift;
361	joko	1.14
362			# TODO: don't use $self->{meta}->{childnodes} directly in here
363			# get it returned from $self->getChildNodes()!!!
364
365			$logger->debug( __PACKAGE__ . "->existsChildNode( nodename=$nodename )" );
366	joko	1.3	$self->getChildNodes() unless $self->{meta}->{childnodes};
367	joko	1.14
368			# quote this, it might contain meta characters which don't work in a regex
369			$nodename = quotemeta($nodename);
370
371			# trace
372			#print Dumper($self->{meta});
373			#print "nodename: $nodename", "\n";
374
375			# FIXME: use "/i" only on win32-systems!
376			my $result = grep(m/$nodename/i, @{$self->{meta}->{childnodes}});
377
378	joko	1.3	return $result;
379			}
380	cvsjoko	1.1
381	joko	1.3	sub connect_tmp {
382	cvsjoko	1.1
383			# my $self = shift;
384			# my $connectionString = shift;
385			# # todo: patch connectionString to $args
386			# _typeCheck($self->{args}{type});
387
388			}
389
390	joko	1.3
391			# ====================================================
392			# CONCRETE METHOD DUMMIES (croaking via "$logger" by calling "_abstract_function")
393			# ====================================================
394
395			# TODO:
396			# - abstract "abstract methods" to list/hash to be used in AUTOLOAD
397			# e.g.: my @ABSTRACT_METHODS = (qw( connect sendCommand getChildNodes ));
398	joko	1.4	# use Class::XYZ (Construct)
399	joko	1.3	# - build them via anonymous subs
400			# - introduce them via symbols
401
402	joko	1.7	sub getCOREHANDLE {
403			my $self = shift;
404			$self->_abstract_function('getCOREHANDLE');
405			}
406
407	cvsjoko	1.1	sub sendCommand {
408			my $self = shift;
409			$self->_abstract_function('sendCommand');
410	joko	1.11	}
411
412			sub createChildNode {
413			my $self = shift;
414			$self->_abstract_function('createChildNode');
415	joko	1.7	}
416
417			sub existsChildNode_tmp {
418			my $self = shift;
419			$self->_abstract_function('existsChildNode');
420	cvsjoko	1.1	}
421
422			sub getChildNodes {
423			my $self = shift;
424			$self->_abstract_function('getChildNodes');
425			}
426
427			sub configureCOREHANDLE {
428			my $self = shift;
429			$self->_abstract_function('configureCOREHANDLE');
430			}
431
432	joko	1.3	sub getMetaInfo {
433			my $self = shift;
434			$self->_abstract_function('getMetaInfo');
435			return;
436			}
437
438			sub getListUnfiltered {
439			my $self = shift;
440			$self->_abstract_function('getListUnfiltered');
441			return;
442			}
443
444			sub getListFiltered {
445			my $self = shift;
446			$self->_abstract_function('getListFiltered');
447			return;
448			}
449
450			sub sendQuery {
451			my $self = shift;
452			$self->_abstract_function('sendQuery');
453			return;
454			}
455
456			sub connect {
457			my $self = shift;
458			$self->_abstract_function('connect');
459			return;
460			}
461
462			sub testIntegrity {
463			my $self = shift;
464			$self->_abstract_function('testIntegrity');
465			return;
466			}
467
468			sub quoteSql {
469			my $self = shift;
470			$self->_abstract_function('quoteSql');
471	joko	1.4	return;
472			}
473
474			sub eraseAll {
475			my $self = shift;
476			$self->_abstract_function('eraseAll');
477			return;
478			}
479
480			sub createDb {
481			my $self = shift;
482			$self->_abstract_function('createDb');
483	joko	1.9	return;
484			}
485
486			sub dropDb {
487			my $self = shift;
488			$self->_abstract_function('dropDb');
489			return;
490			}
491
492			sub rebuildDb {
493			my $self = shift;
494			$self->_abstract_function('rebuildDb');
495	joko	1.13	return;
496			}
497
498			sub getDbName {
499			my $self = shift;
500			$self->_abstract_function('getDbName');
501			return;
502			}
503
504			sub testAvailability {
505			my $self = shift;
506			$self->_abstract_function('testAvailability');
507			return;
508			}
509
510			sub isConnected {
511			my $self = shift;
512			$self->_abstract_function('isConnected');
513			return;
514			}
515
516			sub testDsn {
517			my $self = shift;
518			$self->_abstract_function('testDsn');
519	joko	1.3	return;
520			}
521
522			1;
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