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################################# |
## ------------------------------------------------------------------------ |
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# |
## $Id$ |
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# $Id$ |
## ------------------------------------------------------------------------ |
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# |
## $Log$ |
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# $Log$ |
## Revision 1.12 2003/01/30 21:46:32 joko |
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# Revision 1.1 2002/10/10 03:44:07 cvsjoko |
## + fixed behaviour of AUTOLOAD-method |
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# + new |
## |
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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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package Data::Storage::Handler::Abstract; |
package Data::Storage::Handler::Abstract; |
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use strict; |
use strict; |
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use warnings; |
use warnings; |
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use base qw( DesignPattern::Object ); |
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use Data::Dumper; |
use Data::Dumper; |
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use Tie::SecureHash; |
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#use Data::Storage::Handler; |
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use Data::Transform::Deep qw( merge ); |
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# get logger instance |
# get logger instance |
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my $logger = Log::Dispatch::Config->instance; |
my $logger = Log::Dispatch::Config->instance; |
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my $class = ref($invocant) || $invocant; |
my $class = ref($invocant) || $invocant; |
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# logging info about the actual handler called |
# logging info about the actual handler called |
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$logger->debug( __PACKAGE__ . "->" . "new()" ); |
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$logger->debug( "$invocant->new( @_ )" ); |
$logger->debug( "$invocant->new( @_ )" ); |
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#$logger->debug( __PACKAGE__ . "->" . "new()" ); |
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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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#=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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# merge passed-in arguments to constructor as properties into already blessed secure object |
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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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#print Dumper(@_); |
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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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# 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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# handle meta data |
# handle meta data |
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my $metainfo = _getMetaInfo($class); |
#my $metainfo = $self->getMetaInfo($class); |
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my $metainfo = $self->getMetaInfo(); |
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if (!$metainfo->{disconnectMethod}) { $metainfo->{disconnectMethod} = 'disconnect'; } |
if (!$metainfo->{disconnectMethod}) { $metainfo->{disconnectMethod} = 'disconnect'; } |
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# type? |
# type? |
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$invocant =~ s/Data::Storage::Handler:://; |
$invocant =~ s/Data::Storage::Handler:://; |
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$metainfo->{type} = $invocant; |
$metainfo->{type} = $invocant; |
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# create object from blessed hash-reference |
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# direct accessible (non-protected) properties ( was: my $self = { }; ) |
# direct accessible (non-protected) properties ( was: my $self = { }; ) |
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my $self = { metainfo => $metainfo, @_ }; |
$self->{metainfo} = $metainfo; |
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bless $self, $class; |
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return $self; |
return $self; |
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} |
} |
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# TODO: use NEXT.pm inside this mechanism (to avoid repetitions...) |
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sub AUTOLOAD { |
sub AUTOLOAD { |
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# recursion problem to be avoided here!!! |
# recursion problem to be avoided here!!! |
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# - why: debug-messages are on a very low level including every data-operation to "Data::Storage(::Handler::X)", |
# - why: debug-messages are on a very low level including every data-operation to "Data::Storage(::Handler::X)", |
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# so e.g. a "$storage->insert" would trigger another "$storage->insert" itself |
# so e.g. a "$storage->insert" would trigger another "$storage->insert" itself |
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# which leads to a infinite recursion loop (deep recursion) |
# which leads to a infinite recursion loop (deep recursion) |
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# - solution: locks! (by Hack or via Perl "local"s) |
# - solution: locks! (by Hack or (maybe) via Perl "local"s) |
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my $self = shift; |
my $self = shift; |
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# find out methodname |
# find out methodname |
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my $methodname = $AUTOLOAD; |
my $methodname = $AUTOLOAD; |
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$methodname =~ s/^.*:://; |
$methodname =~ s/^.*:://; |
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#print "method: $methodname", "\n"; |
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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 $methodname eq 'exists'; |
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#print "$methodname - 1", "\n"; |
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# TODO: enhance logging/debugging |
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#if (!$self->exists('COREHANDLE')) { return; } |
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# handle locking (hack) |
# handle locking (hack) |
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if ($self->{lock_info}->{last_method} && $methodname eq $self->{lock_info}->{last_method}) { |
if ($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; |
$self->{lock_info}->{log_lock} = 1; |
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} else { |
} else { |
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$self->{lock_info}->{log_lock} = 0; |
$self->{lock_info}->{log_lock} = 0; |
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} |
} |
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$self->{lock_info}->{last_method} = $methodname; |
$self->{lock_info}->{last_method} = $methodname; |
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#print "$methodname - 2", "\n"; |
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#print Dumper($self); |
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#exit; |
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# get corehandle instance from underlying handler |
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my $core = $self->getCOREHANDLE(); |
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# test for COREHANDLE |
# test for COREHANDLE |
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if (!$self->{COREHANDLE}) { |
#if (!$self->{_COREHANDLE}) { |
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$logger->error( __PACKAGE__ . "[$self->{metainfo}->{type}]" . ": " . "COREHANDLE is undefined while trying to execute method \"$methodname\"" ); |
#=pod |
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#if (!$self->exists('_COREHANDLE')) { |
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#if (!$self->{_COREHANDLE}) { |
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if (!$core) { |
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#print Dumper($self); |
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#exit; |
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my $handlertype = $self->{metainfo}->{type}; |
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$handlertype ||= ''; |
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my $err_msg_core = __PACKAGE__ . "[$handlertype]" . ": " . "COREHANDLE is undefined while trying to execute method \"$methodname\""; |
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#print $err_msg_core, "\n"; |
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#if ($self->exists('lock_info') && !$self->{lock_info}->{log_lock}) { |
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$logger->error( $err_msg_core ); |
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#} |
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return; |
return; |
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} |
} |
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#=cut |
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#print "$methodname - 3", "\n"; |
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# try to dispatch method-call to Storage::Handler::* |
# try to dispatch method-call to Storage::Handler::* |
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#if ($self->can($methodname)) { |
#if ($self->can($methodname)) { |
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#if ($res) { return $res; } |
#if ($res) { return $res; } |
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#} |
#} |
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#print "$methodname - 4", "\n"; |
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# try to dispatch method-call to COREHANDLE |
# try to dispatch method-call to COREHANDLE |
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if ($self->{COREHANDLE}->can($methodname) || $self->{COREHANDLE}->can("AUTOLOAD")) { |
# was: |
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#my $core = $self->{_COREHANDLE}; |
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# is: |
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#my $core = $self->getCOREHANDLE(); |
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#print Dumper($core); |
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#exit; |
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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__ . "->" . $methodname . " (AUTOLOAD)" ); |
#$logger->debug( __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" ); |
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#$lock_AUTOLOAD = 1 if ($methodname eq 'insert'); |
#$lock_AUTOLOAD = 1 if ($methodname eq 'insert'); |
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if (!$self->{lock_info}->{log_lock}) { |
if (!$self->{lock_info}->{log_lock}) { |
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} |
} |
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#$lock_AUTOLOAD = 0; |
#$lock_AUTOLOAD = 0; |
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#$logger->log( level => 'debug', message => __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" ); |
#$logger->log( level => 'debug', message => __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" ); |
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return $self->{COREHANDLE}->$methodname(@_); |
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#print "calling: $methodname", "\n"; |
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# method calls making it until here will get dispatched to the proper handler |
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return $core->$methodname(@_); |
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} elsif ($self->can($methodname)) { |
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# try to call specified method inside our or inherited module(s) scope(s) |
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return $self->$methodname(@_); |
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} |
} |
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} |
} |
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sub DESTROY { |
sub DESTROY { |
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my $self = shift; |
my $self = shift; |
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if ($self->{COREHANDLE}) { |
#if ($self->{COREHANDLE}) { |
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if ($self->exists('_COREHANDLE')) { |
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$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" ); |
$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" ); |
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my $disconnectMethod = $self->{metainfo}->{disconnectMethod}; |
my $disconnectMethod = $self->{metainfo}->{disconnectMethod}; |
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# call "disconnect" or alike on COREHANDLE |
# call "disconnect" or alike on COREHANDLE |
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# was: $self->{COREHANDLE}->disconnect(); |
# was: $self->{COREHANDLE}->disconnect(); |
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$disconnectMethod && ( $self->{COREHANDLE}->$disconnectMethod() ); |
$disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() ); |
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undef $self->{COREHANDLE}; |
undef $self->{_COREHANDLE}; |
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} |
} |
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} |
} |
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sub _typeCheck2 { |
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sub _abstract_function { |
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my $self = shift; |
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my $fName = shift; |
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my $class = ref($self); |
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$logger->error( __PACKAGE__ . ": function \"$fName\" is an abstract method, please implement it in \"$class\""); |
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#exit; |
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} |
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sub _typeCheck { |
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my $type = shift; |
my $type = shift; |
293 |
print "type: $type"; |
print "type: $type"; |
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eval("use Data::Storage::$type;"); |
eval("use Data::Storage::$type;"); |
295 |
} |
} |
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sub _getMetaInfo { |
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my $packagename = shift; |
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#return $self->$metainfo; |
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my $ns = '$' . $packagename . "::metainfo"; |
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$logger->debug( __PACKAGE__ . "->" . "_getMetaInfo()" . " " . "[$ns]" ); |
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return eval($ns); |
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} |
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# ==================================================== |
# ==================================================== |
299 |
# PUBLIC METHODS |
# PUBLIC METHODS |
300 |
# ==================================================== |
# ==================================================== |
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# TODO: abstract "abstract methods" to list/hash to be used in AUTOLOAD |
sub existsChildNode { |
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# e.g.: my @ABSTRACT_METHODS = (qw( connect sendCommand getChildNodes )); |
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sub connect { |
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my $self = shift; |
my $self = shift; |
304 |
$self->_abstract_function('connect'); |
my $nodename = shift; |
305 |
return; |
#$nodename = 'TransactionRoutingTable'; |
306 |
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$logger->debug( __PACKAGE__ . "->existsChildNode( nodename $nodename )" ); |
307 |
$logger->debug( "\"connect\" has to be implemented by handler!" ); |
$self->getChildNodes() unless $self->{meta}->{childnodes}; |
308 |
return; |
my $result = grep(m/$nodename/i, @{$self->{meta}->{childnodes}}); # TODO: use "/i" only on win32-systems! |
309 |
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return $result; |
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} |
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sub connect_tmp { |
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314 |
# my $self = shift; |
# my $self = shift; |
315 |
# my $connectionString = shift; |
# my $connectionString = shift; |
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} |
} |
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# ==================================================== |
323 |
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# CONCRETE METHOD DUMMIES (croaking via "$logger" by calling "_abstract_function") |
324 |
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# ==================================================== |
325 |
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# TODO: |
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# - abstract "abstract methods" to list/hash to be used in AUTOLOAD |
328 |
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# e.g.: my @ABSTRACT_METHODS = (qw( connect sendCommand getChildNodes )); |
329 |
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# use Class::XYZ (Construct) |
330 |
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# - build them via anonymous subs |
331 |
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# - introduce them via symbols |
332 |
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333 |
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sub getCOREHANDLE { |
334 |
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my $self = shift; |
335 |
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$self->_abstract_function('getCOREHANDLE'); |
336 |
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} |
337 |
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338 |
sub sendCommand { |
sub sendCommand { |
339 |
my $self = shift; |
my $self = shift; |
340 |
$self->_abstract_function('sendCommand'); |
$self->_abstract_function('sendCommand'); |
341 |
} |
} |
342 |
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343 |
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sub createChildNode { |
344 |
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my $self = shift; |
345 |
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$self->_abstract_function('createChildNode'); |
346 |
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} |
347 |
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348 |
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sub existsChildNode_tmp { |
349 |
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my $self = shift; |
350 |
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$self->_abstract_function('existsChildNode'); |
351 |
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} |
352 |
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sub getChildNodes { |
sub getChildNodes { |
354 |
my $self = shift; |
my $self = shift; |
355 |
$self->_abstract_function('getChildNodes'); |
$self->_abstract_function('getChildNodes'); |
360 |
$self->_abstract_function('configureCOREHANDLE'); |
$self->_abstract_function('configureCOREHANDLE'); |
361 |
} |
} |
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1; |
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sub getMetaInfo { |
364 |
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my $self = shift; |
365 |
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$self->_abstract_function('getMetaInfo'); |
366 |
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return; |
367 |
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} |
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sub getListUnfiltered { |
370 |
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my $self = shift; |
371 |
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$self->_abstract_function('getListUnfiltered'); |
372 |
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return; |
373 |
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} |
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375 |
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sub getListFiltered { |
376 |
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my $self = shift; |
377 |
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$self->_abstract_function('getListFiltered'); |
378 |
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return; |
379 |
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} |
380 |
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381 |
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sub sendQuery { |
382 |
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my $self = shift; |
383 |
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$self->_abstract_function('sendQuery'); |
384 |
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return; |
385 |
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} |
386 |
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387 |
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sub connect { |
388 |
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my $self = shift; |
389 |
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$self->_abstract_function('connect'); |
390 |
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return; |
391 |
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} |
392 |
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393 |
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sub testIntegrity { |
394 |
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my $self = shift; |
395 |
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$self->_abstract_function('testIntegrity'); |
396 |
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return; |
397 |
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} |
398 |
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399 |
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sub quoteSql { |
400 |
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my $self = shift; |
401 |
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$self->_abstract_function('quoteSql'); |
402 |
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return; |
403 |
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} |
404 |
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405 |
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sub eraseAll { |
406 |
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my $self = shift; |
407 |
|
$self->_abstract_function('eraseAll'); |
408 |
|
return; |
409 |
|
} |
410 |
|
|
411 |
|
sub createDb { |
412 |
|
my $self = shift; |
413 |
|
$self->_abstract_function('createDb'); |
414 |
|
return; |
415 |
|
} |
416 |
|
|
417 |
|
sub dropDb { |
418 |
|
my $self = shift; |
419 |
|
$self->_abstract_function('dropDb'); |
420 |
|
return; |
421 |
|
} |
422 |
|
|
423 |
|
sub rebuildDb { |
424 |
|
my $self = shift; |
425 |
|
$self->_abstract_function('rebuildDb'); |
426 |
|
return; |
427 |
|
} |
428 |
|
|
429 |
|
1; |