Storage/Handler/Abstract.pm

##    ------------------------------------------------------------------------
##    $Id: Abstract.pm,v 1.15 2003/02/20 20:19:13 joko Exp $
##    ------------------------------------------------------------------------
##    $Log: Abstract.pm,v $
##    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

#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	1.16	## $Id: Abstract.pm,v 1.15 2003/02/20 20:19:13 joko Exp $
3	joko	1.11	## ------------------------------------------------------------------------
4	joko	1.7	## $Log: Abstract.pm,v $
5	joko	1.16	## Revision 1.15 2003/02/20 20:19:13 joko
6			## tried to get auto-disconnect working again - failed with that
7			##
8	joko	1.15	## Revision 1.14 2003/02/09 05:12:28 joko
9			## + quoting of strings used in sql-queries!
10			##
11	joko	1.14	## Revision 1.13 2003/01/30 22:27:05 joko
12			## + added new abstract methods
13			##
14	joko	1.13	## Revision 1.12 2003/01/30 21:46:32 joko
15			## + fixed behaviour of AUTOLOAD-method
16			##
17	joko	1.12	## Revision 1.11 2003/01/20 16:43:18 joko
18			## + better argument-property merging
19			## + debugging-output !!!
20			## + abstract-dummy 'sub createChildNode'
21			##
22	joko	1.11	## Revision 1.10 2003/01/19 02:31:51 joko
23			## + fix to 'sub AUTOLOAD'
24			##
25	joko	1.10	## Revision 1.9 2002/12/19 16:30:23 joko
26			## + added 'sub dropDb' and 'sub rebuildDb' as croakers for concrete implementations of methods in proper handlers
27			##
28	joko	1.9	## Revision 1.8 2002/12/13 21:48:35 joko
29			## + sub _abstract_function
30			##
31	joko	1.8	## Revision 1.7 2002/12/05 07:57:48 joko
32			## + now using Tie::SecureHash as a base for the COREHANDLE
33			## + former public COREHANDLE becomes private _COREHANDLE now
34			##
35	joko	1.7	## Revision 1.6 2002/12/03 15:52:24 joko
36			## + fix/feature: if dispatching to deep core method fails (is not declared), try method at Data::Storage - level
37			##
38			## Revision 1.5 2002/12/01 22:19:33 joko
39			## + just disconnect if COREHANDLE exists
40			##
41			## Revision 1.4 2002/12/01 04:45:38 joko
42			## + sub eraseAll
43			## + sub createDb
44			##
45			## Revision 1.3 2002/11/29 04:58:20 joko
46			## + Storage::Result now uses the same dispatching mechanism like Storage::Handler
47			##
48			## Revision 1.2 2002/10/17 00:08:07 joko
49			## + bugfixes regarding "deep recursion" stuff
50			##
51			## Revision 1.1 2002/10/10 03:44:07 cvsjoko
52			## + new
53	joko	1.11	## ------------------------------------------------------------------------
54	joko	1.7
55	cvsjoko	1.1
56			package Data::Storage::Handler::Abstract;
57
58			use strict;
59			use warnings;
60
61	joko	1.8	use base qw( DesignPattern::Object );
62
63	joko	1.11
64	cvsjoko	1.1	use Data::Dumper;
65	joko	1.7	use Tie::SecureHash;
66			#use Data::Storage::Handler;
67	joko	1.15	use Hash::Merge qw( merge );
68	joko	1.11
69	joko	1.16	#use Log::Dispatch::Config;
70			#Log::Dispatch::Config->configure();
71	cvsjoko	1.1
72			# get logger instance
73	joko	1.16	my $logger;
74			eval('$logger = Log::Dispatch::Config->instance;');
75	cvsjoko	1.1
76			#our $lock_info;
77
78			sub new {
79			my $invocant = shift;
80			my $class = ref($invocant) \|\| $invocant;
81
82			# logging info about the actual handler called
83	joko	1.16	$logger->debug( "$invocant->new( @_ )" ) if $logger;
84	joko	1.2	#$logger->debug( __PACKAGE__ . "->" . "new()" );
85	cvsjoko	1.1
86	joko	1.7	# V1 - arguments become properties automagically / normal perl mode blessing
87			=pod
88			# autovivify passed-in arguments as future object attributes into to-be-blessed hash
89	joko	1.3	my $self = { @_ };
90			# create object from blessed hash-reference
91			bless $self, $class;
92	joko	1.7	=cut
93
94	joko	1.10	#=pod
95	joko	1.7	# V2 - maybe more convenient/secure? utilizing Damian Conway's Tie::SecureHash...
96			my $self = Tie::SecureHash->new(
97			$class,
98			# that's it:
99			'metainfo' => undef,
100			'lock_info' => undef,
101			'_COREHANDLE' => undef,
102			'meta' => undef,
103			'locator' => undef,
104			'dataStorageLayer' => undef,
105			'dbi' => undef,
106			# tries:
107			#'Data::Storage::Handler::Abstract::metainfo' => undef,
108			#'dataStorageLayer'
109			#'Data::Storage::Handler::Abstract::dataStorageLayer' => undef,
110			#'Data::Storage::Handler::Tangram::dataStorageLayer' => undef,
111			#'Data::Dumper::locator' => undef,
112			#$class . '::locator' => undef,
113			#'Data::Storage::Handler::Tangram::locator' => undef,
114			#'Data::Storage::Handler::DBI::locator' => undef,
115			#_protected => ,
116			#__private => ,
117			);
118	joko	1.10	#=cut
119	joko	1.7
120			# merge passed-in arguments to constructor as properties into already blessed secure object
121	joko	1.11
122	joko	1.7	# mungle arguments from array into hash - perl does the job ;)
123	joko	1.11	#my %args = @_;
124			#my %args = ();
125
126			#print Dumper(@_);
127
128	joko	1.7	# merge attributes one-by-one
129			# TODO: deep_copy? / merge_deep?
130	joko	1.11	while (my $elemName = shift @_) {
131			#print "elemName: $elemName", "\n";
132			if (my $elemValue = shift @_) {
133			#print Dumper($elemValue);
134			#print "elemName=$elemName, elemValue=$elemValue", "\n";
135			$self->{$elemName} = $elemValue;
136			}
137			#$self->{$_} = $args{$_};
138			#$self->{$_} = $args{$_};
139	joko	1.7	}
140
141			# V3 - rolling our own security (just for {COREHANDLE} - nothing else) - nope, Tie::SecureHash works wonderful
142			#my $self = { @_ };
143			#bless $self, $class;
144
145
146	joko	1.3
147	cvsjoko	1.1	# handle meta data
148	joko	1.3	#my $metainfo = $self->getMetaInfo($class);
149			my $metainfo = $self->getMetaInfo();
150	cvsjoko	1.1	if (!$metainfo->{disconnectMethod}) { $metainfo->{disconnectMethod} = 'disconnect'; }
151			# type?
152			$invocant =~ s/Data::Storage::Handler:://;
153			$metainfo->{type} = $invocant;
154
155			# direct accessible (non-protected) properties ( was: my $self = { }; )
156	joko	1.3	$self->{metainfo} = $metainfo;
157	cvsjoko	1.1
158			return $self;
159			}
160
161
162	joko	1.10	# TODO: use NEXT.pm inside this mechanism (to avoid repetitions...)
163	cvsjoko	1.1	sub AUTOLOAD {
164
165			# recursion problem to be avoided here!!!
166
167			# - problem: we get recursion-hangs!!! => perl stops with ...
168			# "Deep recursion on subroutine "Data::Storage::Handler::Abstract::AUTOLOAD" at [...]/libs/Data/Storage.pm line 38."
169
170			# - when: if we log to ourselves as a storage-implementation (e.g. via Log::Dispatch::Tangram)
171			# - why: debug-messages are on a very low level including every data-operation to "Data::Storage(::Handler::X)",
172			# so e.g. a "$storage->insert" would trigger another "$storage->insert" itself
173			# which leads to a infinite recursion loop (deep recursion)
174	joko	1.2	# - solution: locks! (by Hack or (maybe) via Perl "local"s)
175	cvsjoko	1.1
176			my $self = shift;
177
178			our $AUTOLOAD;
179			#return if $AUTOLOAD =~ m/::DESTROY$/;
180
181			# find out methodname
182			my $methodname = $AUTOLOAD;
183			$methodname =~ s/^.*:://;
184	joko	1.7
185			#print "method: $methodname", "\n";
186
187			# TODO: document this! handler-private methods listed here will not be triggered (internal use)
188			# in this case, "exists" is a method reserved for Tie::SecureHash,
189			# which encapsulates the perl data structure (HASH) under this object
190			# this is to prevent deep recursion's
191			return if lc $methodname eq 'exists';
192
193	joko	1.12	#print "$methodname - 1", "\n";
194	joko	1.7
195			# TODO: enhance logging/debugging
196			#if (!$self->exists('COREHANDLE')) { return; }
197	cvsjoko	1.1
198			# handle locking (hack)
199	joko	1.10	if ($self->can('exists') && $self->exists('lock_info') && $self->{lock_info}->{last_method} && $methodname eq $self->{lock_info}->{last_method}) {
200	cvsjoko	1.1	$self->{lock_info}->{log_lock} = 1;
201			} else {
202			$self->{lock_info}->{log_lock} = 0;
203			}
204			$self->{lock_info}->{last_method} = $methodname;
205
206	joko	1.12	#print "$methodname - 2", "\n";
207	joko	1.7
208			#print Dumper($self);
209			#exit;
210
211			# get corehandle instance from underlying handler
212			my $core = $self->getCOREHANDLE();
213
214	cvsjoko	1.1	# test for COREHANDLE
215	joko	1.7	#if (!$self->{_COREHANDLE}) {
216			#=pod
217			#if (!$self->exists('_COREHANDLE')) {
218			#if (!$self->{_COREHANDLE}) {
219			if (!$core) {
220	joko	1.10
221			#print Dumper($self);
222			#exit;
223
224			my $handlertype = $self->{metainfo}->{type};
225			$handlertype \|\|= '';
226
227			my $err_msg_core = __PACKAGE__ . "[$handlertype]" . ": " . "COREHANDLE is undefined while trying to execute method \"$methodname\"";
228	joko	1.12
229			#print $err_msg_core, "\n";
230
231			#if ($self->exists('lock_info') && !$self->{lock_info}->{log_lock}) {
232	joko	1.7	$logger->error( $err_msg_core );
233	joko	1.12	#}
234
235	cvsjoko	1.1	return;
236	joko	1.12
237	cvsjoko	1.1	}
238	joko	1.7	#=cut
239
240			#print "$methodname - 3", "\n";
241	cvsjoko	1.1
242			# try to dispatch method-call to Storage::Handler::*
243			#if ($self->can($methodname)) {
244			#$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->" . $methodname . "(@_)" );
245			#my $res = $self->$methodname(@_);
246			#if ($res) { return $res; }
247			#}
248
249	joko	1.7	#print "$methodname - 4", "\n";
250
251	cvsjoko	1.1	# try to dispatch method-call to COREHANDLE
252	joko	1.7	# was:
253			#my $core = $self->{_COREHANDLE};
254			# is:
255			#my $core = $self->getCOREHANDLE();
256
257			#print Dumper($core);
258			#exit;
259
260			# was:
261			#if ($self->{_COREHANDLE}->can($methodname) \|\| $self->{_COREHANDLE}->can("AUTOLOAD")) {
262			# is:
263			if ($core->can($methodname) \|\| $core->can("AUTOLOAD")) {
264	cvsjoko	1.1	#$logger->debug( __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" );
265			#$lock_AUTOLOAD = 1 if ($methodname eq 'insert');
266			if (!$self->{lock_info}->{log_lock}) {
267			#print "method: $methodname", "\n";
268			$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->" . $methodname . "(@_)" );
269			} else {
270			# AUTOLOAD - sub is locked to prevent deep recursions if (e.g.) db-inserts cause log-actions to same db itself
271			}
272			#$lock_AUTOLOAD = 0;
273			#$logger->log( level => 'debug', message => __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" );
274	joko	1.3
275	joko	1.7	#print "calling: $methodname", "\n";
276
277	joko	1.10	# method calls making it until here will get dispatched to the proper handler
278	joko	1.7	return $core->$methodname(@_);
279	joko	1.6
280			} elsif ($self->can($methodname)) {
281	joko	1.10	# try to call specified method inside our or inherited module(s) scope(s)
282	joko	1.6	return $self->$methodname(@_);
283	cvsjoko	1.1	}
284
285			}
286
287			sub DESTROY {
288			my $self = shift;
289	joko	1.15
290			return;
291
292			$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" );
293
294			my $disconnectMethod = $self->{metainfo}->{disconnectMethod};
295			print "meth: ", $disconnectMethod, "\n";
296
297			#$disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() );
298			$self->{_COREHANDLE}->$disconnectMethod();
299			#$self->$disconnectMethod();
300
301			#my $core1 = $self->getCOREHANDLE() if $self->can('getCOREHANDLE');
302			#$core1->$disconnectMethod();
303
304			return;
305
306			print "DESTROY-1", "\n";
307			#if ($self->{__COREHANDLE}) {
308			#if ($self->exists('_COREHANDLE')) {
309
310			# get corehandle instance from underlying handler
311			my $core;
312			$core = $self->getCOREHANDLE() if $self->can('getCOREHANDLE');
313
314			#if ($self->{STORAGEHANDLE}) {
315			if ($core) {
316			print "DESTROY-2", "\n";
317	cvsjoko	1.1	$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" );
318
319			my $disconnectMethod = $self->{metainfo}->{disconnectMethod};
320
321			# call "disconnect" or alike on COREHANDLE
322			# was: $self->{COREHANDLE}->disconnect();
323	joko	1.7	$disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() );
324	cvsjoko	1.1
325	joko	1.7	undef $self->{_COREHANDLE};
326	cvsjoko	1.1	}
327			}
328
329	joko	1.7	sub _typeCheck2 {
330	cvsjoko	1.1	my $type = shift;
331			print "type: $type";
332			eval("use Data::Storage::$type;");
333			}
334
335
336			# ====================================================
337			# PUBLIC METHODS
338			# ====================================================
339
340	joko	1.3	sub existsChildNode {
341			my $self = shift;
342			my $nodename = shift;
343	joko	1.14
344			# TODO: don't use $self->{meta}->{childnodes} directly in here
345			# get it returned from $self->getChildNodes()!!!
346
347			$logger->debug( __PACKAGE__ . "->existsChildNode( nodename=$nodename )" );
348	joko	1.3	$self->getChildNodes() unless $self->{meta}->{childnodes};
349	joko	1.14
350			# quote this, it might contain meta characters which don't work in a regex
351			$nodename = quotemeta($nodename);
352
353			# trace
354			#print Dumper($self->{meta});
355			#print "nodename: $nodename", "\n";
356
357			# FIXME: use "/i" only on win32-systems!
358			my $result = grep(m/$nodename/i, @{$self->{meta}->{childnodes}});
359
360	joko	1.3	return $result;
361			}
362	cvsjoko	1.1
363	joko	1.3	sub connect_tmp {
364	cvsjoko	1.1
365			# my $self = shift;
366			# my $connectionString = shift;
367			# # todo: patch connectionString to $args
368			# _typeCheck($self->{args}{type});
369
370			}
371
372	joko	1.3
373			# ====================================================
374			# CONCRETE METHOD DUMMIES (croaking via "$logger" by calling "_abstract_function")
375			# ====================================================
376
377			# TODO:
378			# - abstract "abstract methods" to list/hash to be used in AUTOLOAD
379			# e.g.: my @ABSTRACT_METHODS = (qw( connect sendCommand getChildNodes ));
380	joko	1.4	# use Class::XYZ (Construct)
381	joko	1.3	# - build them via anonymous subs
382			# - introduce them via symbols
383
384	joko	1.7	sub getCOREHANDLE {
385			my $self = shift;
386			$self->_abstract_function('getCOREHANDLE');
387			}
388
389	cvsjoko	1.1	sub sendCommand {
390			my $self = shift;
391			$self->_abstract_function('sendCommand');
392	joko	1.11	}
393
394			sub createChildNode {
395			my $self = shift;
396			$self->_abstract_function('createChildNode');
397	joko	1.7	}
398
399			sub existsChildNode_tmp {
400			my $self = shift;
401			$self->_abstract_function('existsChildNode');
402	cvsjoko	1.1	}
403
404			sub getChildNodes {
405			my $self = shift;
406			$self->_abstract_function('getChildNodes');
407			}
408
409			sub configureCOREHANDLE {
410			my $self = shift;
411			$self->_abstract_function('configureCOREHANDLE');
412			}
413
414	joko	1.3	sub getMetaInfo {
415			my $self = shift;
416			$self->_abstract_function('getMetaInfo');
417			return;
418			}
419
420			sub getListUnfiltered {
421			my $self = shift;
422			$self->_abstract_function('getListUnfiltered');
423			return;
424			}
425
426			sub getListFiltered {
427			my $self = shift;
428			$self->_abstract_function('getListFiltered');
429			return;
430			}
431
432			sub sendQuery {
433			my $self = shift;
434			$self->_abstract_function('sendQuery');
435			return;
436			}
437
438			sub connect {
439			my $self = shift;
440			$self->_abstract_function('connect');
441			return;
442			}
443
444			sub testIntegrity {
445			my $self = shift;
446			$self->_abstract_function('testIntegrity');
447			return;
448			}
449
450			sub quoteSql {
451			my $self = shift;
452			$self->_abstract_function('quoteSql');
453	joko	1.4	return;
454			}
455
456			sub eraseAll {
457			my $self = shift;
458			$self->_abstract_function('eraseAll');
459			return;
460			}
461
462			sub createDb {
463			my $self = shift;
464			$self->_abstract_function('createDb');
465	joko	1.9	return;
466			}
467
468			sub dropDb {
469			my $self = shift;
470			$self->_abstract_function('dropDb');
471			return;
472			}
473
474			sub rebuildDb {
475			my $self = shift;
476			$self->_abstract_function('rebuildDb');
477	joko	1.13	return;
478			}
479
480			sub getDbName {
481			my $self = shift;
482			$self->_abstract_function('getDbName');
483			return;
484			}
485
486			sub testAvailability {
487			my $self = shift;
488			$self->_abstract_function('testAvailability');
489			return;
490			}
491
492			sub isConnected {
493			my $self = shift;
494			$self->_abstract_function('isConnected');
495			return;
496			}
497
498			sub testDsn {
499			my $self = shift;
500			$self->_abstract_function('testDsn');
501	joko	1.3	return;
502			}
503
504			1;
MailToCvsAdmin">MailToCvsAdmin	ViewVC Help
Powered by ViewVC 1.1.26