Storage/Handler/Abstract.pm

##    ------------------------------------------------------------------------
##    $Id: Abstract.pm,v 1.14 2003/02/09 05:12:28 joko Exp $
##    ------------------------------------------------------------------------
##    $Log: Abstract.pm,v $
##    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 );


# 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;

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