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## ------------------------------------------------------------------------ |
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## $Id: Abstract.pm,v 1.18 2003/06/06 03:40:57 joko Exp $ |
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## ------------------------------------------------------------------------ |
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## $Log: Abstract.pm,v $ |
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## Revision 1.18 2003/06/06 03:40:57 joko |
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## disabled autovivifying of arguments as attributes |
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## |
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## Revision 1.17 2003/05/13 07:58:49 joko |
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## fix: die if methodname is empty |
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## fixes to log-string |
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## |
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## Revision 1.16 2003/04/18 16:07:53 joko |
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## just use logger if instantiation successed |
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## |
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## Revision 1.15 2003/02/20 20:19:13 joko |
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## tried to get auto-disconnect working again - failed with that |
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## |
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## Revision 1.14 2003/02/09 05:12:28 joko |
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## + quoting of strings used in sql-queries! |
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## |
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## Revision 1.13 2003/01/30 22:27:05 joko |
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## + added new abstract methods |
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## |
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## Revision 1.12 2003/01/30 21:46:32 joko |
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## + fixed behaviour of AUTOLOAD-method |
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## |
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## Revision 1.11 2003/01/20 16:43:18 joko |
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## + better argument-property merging |
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## + debugging-output !!! |
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## + abstract-dummy 'sub createChildNode' |
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## |
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## Revision 1.10 2003/01/19 02:31:51 joko |
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## + fix to 'sub AUTOLOAD' |
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## |
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## Revision 1.9 2002/12/19 16:30:23 joko |
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## + added 'sub dropDb' and 'sub rebuildDb' as croakers for concrete implementations of methods in proper handlers |
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## |
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## Revision 1.8 2002/12/13 21:48:35 joko |
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## + sub _abstract_function |
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## |
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## Revision 1.7 2002/12/05 07:57:48 joko |
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## + now using Tie::SecureHash as a base for the COREHANDLE |
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## + former public COREHANDLE becomes private _COREHANDLE now |
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## |
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## Revision 1.6 2002/12/03 15:52:24 joko |
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## + fix/feature: if dispatching to deep core method fails (is not declared), try method at Data::Storage - level |
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## |
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## Revision 1.5 2002/12/01 22:19:33 joko |
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## + just disconnect if COREHANDLE exists |
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## |
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## Revision 1.4 2002/12/01 04:45:38 joko |
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## + sub eraseAll |
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## + sub createDb |
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## |
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## Revision 1.3 2002/11/29 04:58:20 joko |
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## + Storage::Result now uses the same dispatching mechanism like Storage::Handler |
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## |
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## Revision 1.2 2002/10/17 00:08:07 joko |
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## + bugfixes regarding "deep recursion" stuff |
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## |
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## Revision 1.1 2002/10/10 03:44:07 cvsjoko |
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## + new |
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## ------------------------------------------------------------------------ |
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|
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|
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package Data::Storage::Handler::Abstract; |
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|
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use strict; |
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use warnings; |
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|
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use base qw( DesignPattern::Object ); |
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|
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|
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use Data::Dumper; |
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use Tie::SecureHash; |
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#use Data::Storage::Handler; |
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use Hash::Merge qw( merge ); |
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|
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#use Log::Dispatch::Config; |
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#Log::Dispatch::Config->configure(); |
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|
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# get logger instance |
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my $logger; |
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eval('$logger = Log::Dispatch::Config->instance;'); |
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|
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#our $lock_info; |
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|
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sub new { |
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my $invocant = shift; |
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my $class = ref($invocant) || $invocant; |
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|
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# logging info about the actual handler called |
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$logger->debug( "$invocant->new( @_ )" ) if $logger; |
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#$logger->debug( __PACKAGE__ . "->" . "new()" ); |
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|
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# V1 - arguments become properties automagically / normal perl mode blessing |
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=pod |
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# autovivify passed-in arguments as future object attributes into to-be-blessed hash |
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my $self = { @_ }; |
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# create object from blessed hash-reference |
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bless $self, $class; |
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=cut |
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|
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#=pod |
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# V2 - maybe more convenient/secure? utilizing Damian Conway's Tie::SecureHash... |
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my $self = Tie::SecureHash->new( |
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$class, |
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# that's it: |
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'metainfo' => undef, |
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'lock_info' => undef, |
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'_COREHANDLE' => undef, |
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'meta' => undef, |
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'locator' => undef, |
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'dataStorageLayer' => undef, |
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'dbi' => undef, |
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# tries: |
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#'Data::Storage::Handler::Abstract::metainfo' => undef, |
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#'dataStorageLayer' |
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#'Data::Storage::Handler::Abstract::dataStorageLayer' => undef, |
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#'Data::Storage::Handler::Tangram::dataStorageLayer' => undef, |
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#'Data::Dumper::locator' => undef, |
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#$class . '::locator' => undef, |
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#'Data::Storage::Handler::Tangram::locator' => undef, |
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#'Data::Storage::Handler::DBI::locator' => undef, |
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#_protected => , |
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#__private => , |
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); |
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#=cut |
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|
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# merge passed-in arguments to constructor as properties into already blessed secure object |
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|
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# mungle arguments from array into hash - perl does the job ;) |
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#my %args = @_; |
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#my %args = (); |
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|
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#print Dumper(@_); |
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|
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# merge attributes one-by-one |
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# TODO: deep_copy? / merge_deep? |
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while (my $elemName = shift @_) { |
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#print "elemName: $elemName", "\n"; |
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if (my $elemValue = shift @_) { |
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#print Dumper($elemValue); |
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#print "elemName=$elemName, elemValue=$elemValue", "\n"; |
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$self->{$elemName} = $elemValue; |
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} |
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#$self->{$_} = $args{$_}; |
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#$self->{$_} = $args{$_}; |
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} |
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|
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# V3 - rolling our own security (just for {COREHANDLE} - nothing else) - nope, Tie::SecureHash works wonderful |
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#my $self = { @_ }; |
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#bless $self, $class; |
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|
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|
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|
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# handle meta data |
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#my $metainfo = $self->getMetaInfo($class); |
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my $metainfo = $self->getMetaInfo(); |
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#if (!$metainfo->{disconnectMethod}) { $metainfo->{disconnectMethod} = 'disconnect'; } |
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# type? |
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$invocant =~ s/Data::Storage::Handler:://; |
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$metainfo->{type} = $invocant; |
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|
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# direct accessible (non-protected) properties ( was: my $self = { }; ) |
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$self->{metainfo} = $metainfo; |
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|
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return $self; |
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} |
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|
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|
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# TODO: use NEXT.pm inside this mechanism (to avoid repetitions...) |
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sub AUTOLOAD { |
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|
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# recursion problem to be avoided here!!! |
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|
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# - problem: we get recursion-hangs!!! => perl stops with ... |
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# "Deep recursion on subroutine "Data::Storage::Handler::Abstract::AUTOLOAD" at [...]/libs/Data/Storage.pm line 38." |
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|
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# - when: if we log to ourselves as a storage-implementation (e.g. via Log::Dispatch::Tangram) |
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# - why: debug-messages are on a very low level including every data-operation to "Data::Storage(::Handler::X)", |
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# so e.g. a "$storage->insert" would trigger another "$storage->insert" itself |
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# which leads to a infinite recursion loop (deep recursion) |
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# - solution: locks! (by Hack or (maybe) via Perl "local"s) |
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|
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my $self = shift; |
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|
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our $AUTOLOAD; |
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#return if $AUTOLOAD =~ m/::DESTROY$/; |
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|
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# find out methodname |
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my $methodname = $AUTOLOAD; |
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$methodname =~ s/^.*:://; |
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|
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#print "method: $methodname", "\n"; |
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|
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# TODO: document this! handler-private methods listed here will not be triggered (internal use) |
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# in this case, "exists" is a method reserved for Tie::SecureHash, |
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# which encapsulates the perl data structure (HASH) under this object |
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# this is to prevent deep recursion's |
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return if lc $methodname eq 'exists'; |
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|
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#print "$methodname - 1", "\n"; |
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|
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# TODO: enhance logging/debugging |
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#if (!$self->exists('COREHANDLE')) { return; } |
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|
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# handle locking (hack) |
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if ($self->can('exists') && $self->exists('lock_info') && $self->{lock_info}->{last_method} && $methodname eq $self->{lock_info}->{last_method}) { |
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$self->{lock_info}->{log_lock} = 1; |
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} else { |
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$self->{lock_info}->{log_lock} = 0; |
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} |
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$self->{lock_info}->{last_method} = $methodname; |
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|
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#print "$methodname - 2", "\n"; |
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|
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#print Dumper($self); |
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#exit; |
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|
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# get corehandle instance from underlying handler |
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my $core = $self->getCOREHANDLE(); |
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|
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# test for COREHANDLE |
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#if (!$self->{_COREHANDLE}) { |
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#=pod |
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#if (!$self->exists('_COREHANDLE')) { |
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#if (!$self->{_COREHANDLE}) { |
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if (!$core) { |
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|
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#print Dumper($self); |
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#exit; |
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|
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my $handlertype = $self->{metainfo}->{type}; |
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$handlertype ||= ''; |
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|
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my $err_msg_core = __PACKAGE__ . "[$handlertype]" . ": " . "COREHANDLE is undefined while trying to execute method \"$methodname\""; |
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|
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#print $err_msg_core, "\n"; |
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|
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#if ($self->exists('lock_info') && !$self->{lock_info}->{log_lock}) { |
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$logger->error( $err_msg_core ); |
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#} |
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|
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return; |
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|
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} |
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#=cut |
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|
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=pod |
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if (!$methodname) { |
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die("Methodname is not defined!"); |
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return; |
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} |
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=cut |
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|
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#print "$methodname - 3", "\n"; |
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|
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# try to dispatch method-call to Storage::Handler::* |
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#if ($self->can($methodname)) { |
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#$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->" . $methodname . "(@_)" ); |
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#my $res = $self->$methodname(@_); |
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#if ($res) { return $res; } |
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#} |
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|
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#print "$methodname - 4", "\n"; |
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|
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# try to dispatch method-call to COREHANDLE |
| 269 |
# was: |
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#my $core = $self->{_COREHANDLE}; |
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# is: |
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#my $core = $self->getCOREHANDLE(); |
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|
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#print Dumper($core); |
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#exit; |
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|
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# was: |
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#if ($self->{_COREHANDLE}->can($methodname) || $self->{_COREHANDLE}->can("AUTOLOAD")) { |
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# is: |
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if ($core->can($methodname) || $core->can("AUTOLOAD")) { |
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#$logger->debug( __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" ); |
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#$lock_AUTOLOAD = 1 if ($methodname eq 'insert'); |
| 283 |
if (!$self->{lock_info}->{log_lock}) { |
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#print "method: $methodname", "\n"; |
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my $type = $self->{metainfo}->{type}; |
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$type ||= ''; |
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# FIXME! |
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#$logger->debug( __PACKAGE__ . "[$type]" . "->" . $methodname . "(@_)" ); |
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$logger->debug( __PACKAGE__ . "[$type]" . "->" . $methodname ); |
| 290 |
} else { |
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# AUTOLOAD - sub is locked to prevent deep recursions if (e.g.) db-inserts cause log-actions to same db itself |
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} |
| 293 |
#$lock_AUTOLOAD = 0; |
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#$logger->log( level => 'debug', message => __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" ); |
| 295 |
|
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#print "calling: $methodname", "\n"; |
| 297 |
|
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# method calls making it until here will get dispatched to the proper handler |
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return $core->$methodname(@_); |
| 300 |
|
| 301 |
} elsif ($self->can($methodname)) { |
| 302 |
# try to call specified method inside our or inherited module(s) scope(s) |
| 303 |
return $self->$methodname(@_); |
| 304 |
} |
| 305 |
|
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} |
| 307 |
|
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sub DESTROY { |
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my $self = shift; |
| 310 |
|
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return; |
| 312 |
|
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$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" ); |
| 314 |
|
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my $disconnectMethod = $self->{metainfo}->{disconnectMethod}; |
| 316 |
print "meth: ", $disconnectMethod, "\n"; |
| 317 |
|
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#$disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() ); |
| 319 |
$self->{_COREHANDLE}->$disconnectMethod(); |
| 320 |
#$self->$disconnectMethod(); |
| 321 |
|
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#my $core1 = $self->getCOREHANDLE() if $self->can('getCOREHANDLE'); |
| 323 |
#$core1->$disconnectMethod(); |
| 324 |
|
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return; |
| 326 |
|
| 327 |
print "DESTROY-1", "\n"; |
| 328 |
#if ($self->{__COREHANDLE}) { |
| 329 |
#if ($self->exists('_COREHANDLE')) { |
| 330 |
|
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# get corehandle instance from underlying handler |
| 332 |
my $core; |
| 333 |
$core = $self->getCOREHANDLE() if $self->can('getCOREHANDLE'); |
| 334 |
|
| 335 |
#if ($self->{STORAGEHANDLE}) { |
| 336 |
if ($core) { |
| 337 |
print "DESTROY-2", "\n"; |
| 338 |
$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" ); |
| 339 |
|
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my $disconnectMethod = $self->{metainfo}->{disconnectMethod}; |
| 341 |
|
| 342 |
# call "disconnect" or alike on COREHANDLE |
| 343 |
# was: $self->{COREHANDLE}->disconnect(); |
| 344 |
$disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() ); |
| 345 |
|
| 346 |
undef $self->{_COREHANDLE}; |
| 347 |
} |
| 348 |
} |
| 349 |
|
| 350 |
sub _typeCheck2 { |
| 351 |
my $type = shift; |
| 352 |
print "type: $type"; |
| 353 |
eval("use Data::Storage::$type;"); |
| 354 |
} |
| 355 |
|
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|
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# ==================================================== |
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# PUBLIC METHODS |
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# ==================================================== |
| 360 |
|
| 361 |
sub existsChildNode { |
| 362 |
my $self = shift; |
| 363 |
my $nodename = shift; |
| 364 |
|
| 365 |
# TODO: don't use $self->{meta}->{childnodes} directly in here |
| 366 |
# get it returned from $self->getChildNodes()!!! |
| 367 |
|
| 368 |
$logger->debug( __PACKAGE__ . "->existsChildNode( nodename=$nodename )" ); |
| 369 |
$self->getChildNodes() unless $self->{meta}->{childnodes}; |
| 370 |
|
| 371 |
# quote this, it might contain meta characters which don't work in a regex |
| 372 |
$nodename = quotemeta($nodename); |
| 373 |
|
| 374 |
# trace |
| 375 |
#print Dumper($self->{meta}); |
| 376 |
#print "nodename: $nodename", "\n"; |
| 377 |
|
| 378 |
# FIXME: use "/i" only on win32-systems! |
| 379 |
my $result = grep(m/$nodename/i, @{$self->{meta}->{childnodes}}); |
| 380 |
|
| 381 |
return $result; |
| 382 |
} |
| 383 |
|
| 384 |
sub connect_tmp { |
| 385 |
|
| 386 |
# my $self = shift; |
| 387 |
# my $connectionString = shift; |
| 388 |
# # todo: patch connectionString to $args |
| 389 |
# _typeCheck($self->{args}{type}); |
| 390 |
|
| 391 |
} |
| 392 |
|
| 393 |
|
| 394 |
# ==================================================== |
| 395 |
# CONCRETE METHOD DUMMIES (croaking via "$logger" by calling "_abstract_function") |
| 396 |
# ==================================================== |
| 397 |
|
| 398 |
# TODO: |
| 399 |
# - abstract "abstract methods" to list/hash to be used in AUTOLOAD |
| 400 |
# e.g.: my @ABSTRACT_METHODS = (qw( connect sendCommand getChildNodes )); |
| 401 |
# use Class::XYZ (Construct) |
| 402 |
# - build them via anonymous subs |
| 403 |
# - introduce them via symbols |
| 404 |
|
| 405 |
sub getCOREHANDLE { |
| 406 |
my $self = shift; |
| 407 |
$self->_abstract_function('getCOREHANDLE'); |
| 408 |
} |
| 409 |
|
| 410 |
sub sendCommand { |
| 411 |
my $self = shift; |
| 412 |
$self->_abstract_function('sendCommand'); |
| 413 |
} |
| 414 |
|
| 415 |
sub createChildNode { |
| 416 |
my $self = shift; |
| 417 |
$self->_abstract_function('createChildNode'); |
| 418 |
} |
| 419 |
|
| 420 |
sub existsChildNode_tmp { |
| 421 |
my $self = shift; |
| 422 |
$self->_abstract_function('existsChildNode'); |
| 423 |
} |
| 424 |
|
| 425 |
sub getChildNodes { |
| 426 |
my $self = shift; |
| 427 |
$self->_abstract_function('getChildNodes'); |
| 428 |
} |
| 429 |
|
| 430 |
sub configureCOREHANDLE { |
| 431 |
my $self = shift; |
| 432 |
$self->_abstract_function('configureCOREHANDLE'); |
| 433 |
} |
| 434 |
|
| 435 |
sub getMetaInfo { |
| 436 |
my $self = shift; |
| 437 |
$self->_abstract_function('getMetaInfo'); |
| 438 |
return; |
| 439 |
} |
| 440 |
|
| 441 |
sub getListUnfiltered { |
| 442 |
my $self = shift; |
| 443 |
$self->_abstract_function('getListUnfiltered'); |
| 444 |
return; |
| 445 |
} |
| 446 |
|
| 447 |
sub getListFiltered { |
| 448 |
my $self = shift; |
| 449 |
$self->_abstract_function('getListFiltered'); |
| 450 |
return; |
| 451 |
} |
| 452 |
|
| 453 |
sub sendQuery { |
| 454 |
my $self = shift; |
| 455 |
$self->_abstract_function('sendQuery'); |
| 456 |
return; |
| 457 |
} |
| 458 |
|
| 459 |
sub connect { |
| 460 |
my $self = shift; |
| 461 |
$self->_abstract_function('connect'); |
| 462 |
return; |
| 463 |
} |
| 464 |
|
| 465 |
sub testIntegrity { |
| 466 |
my $self = shift; |
| 467 |
$self->_abstract_function('testIntegrity'); |
| 468 |
return; |
| 469 |
} |
| 470 |
|
| 471 |
sub quoteSql { |
| 472 |
my $self = shift; |
| 473 |
$self->_abstract_function('quoteSql'); |
| 474 |
return; |
| 475 |
} |
| 476 |
|
| 477 |
sub eraseAll { |
| 478 |
my $self = shift; |
| 479 |
$self->_abstract_function('eraseAll'); |
| 480 |
return; |
| 481 |
} |
| 482 |
|
| 483 |
sub createDb { |
| 484 |
my $self = shift; |
| 485 |
$self->_abstract_function('createDb'); |
| 486 |
return; |
| 487 |
} |
| 488 |
|
| 489 |
sub dropDb { |
| 490 |
my $self = shift; |
| 491 |
$self->_abstract_function('dropDb'); |
| 492 |
return; |
| 493 |
} |
| 494 |
|
| 495 |
sub rebuildDb { |
| 496 |
my $self = shift; |
| 497 |
$self->_abstract_function('rebuildDb'); |
| 498 |
return; |
| 499 |
} |
| 500 |
|
| 501 |
sub getDbName { |
| 502 |
my $self = shift; |
| 503 |
$self->_abstract_function('getDbName'); |
| 504 |
return; |
| 505 |
} |
| 506 |
|
| 507 |
sub testAvailability { |
| 508 |
my $self = shift; |
| 509 |
$self->_abstract_function('testAvailability'); |
| 510 |
return; |
| 511 |
} |
| 512 |
|
| 513 |
sub isConnected { |
| 514 |
my $self = shift; |
| 515 |
$self->_abstract_function('isConnected'); |
| 516 |
return; |
| 517 |
} |
| 518 |
|
| 519 |
sub testDsn { |
| 520 |
my $self = shift; |
| 521 |
$self->_abstract_function('testDsn'); |
| 522 |
return; |
| 523 |
} |
| 524 |
|
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1; |
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