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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 1.9 2002/12/19 16:30:23 joko |
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# Revision 1.6 2002/12/03 15:52:24 joko |
## + added 'sub dropDb' and 'sub rebuildDb' as croakers for concrete implementations of methods in proper handlers |
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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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## Revision 1.8 2002/12/13 21:48:35 joko |
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# Revision 1.5 2002/12/01 22:19:33 joko |
## + sub _abstract_function |
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# + just disconnect if COREHANDLE exists |
## |
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## Revision 1.7 2002/12/05 07:57:48 joko |
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# Revision 1.4 2002/12/01 04:45:38 joko |
## + now using Tie::SecureHash as a base for the COREHANDLE |
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# + sub eraseAll |
## + former public COREHANDLE becomes private _COREHANDLE now |
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# + sub createDb |
## |
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## Revision 1.6 2002/12/03 15:52:24 joko |
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# Revision 1.3 2002/11/29 04:58:20 joko |
## + fix/feature: if dispatching to deep core method fails (is not declared), try method at Data::Storage - level |
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# + Storage::Result now uses the same dispatching mechanism like Storage::Handler |
## |
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## Revision 1.5 2002/12/01 22:19:33 joko |
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# Revision 1.2 2002/10/17 00:08:07 joko |
## + just disconnect if COREHANDLE exists |
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# + bugfixes regarding "deep recursion" stuff |
## |
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## Revision 1.4 2002/12/01 04:45:38 joko |
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# Revision 1.1 2002/10/10 03:44:07 cvsjoko |
## + sub eraseAll |
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# + new |
## + 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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# get logger instance |
# get logger instance |
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my $logger = Log::Dispatch::Config->instance; |
my $logger = Log::Dispatch::Config->instance; |
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$logger->debug( "$invocant->new( @_ )" ); |
$logger->debug( "$invocant->new( @_ )" ); |
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#$logger->debug( __PACKAGE__ . "->" . "new()" ); |
#$logger->debug( __PACKAGE__ . "->" . "new()" ); |
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# arguments become properties |
# 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 = { @_ }; |
my $self = { @_ }; |
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# create object from blessed hash-reference |
# create object from blessed hash-reference |
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bless $self, $class; |
bless $self, $class; |
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=cut |
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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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# 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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# merge attributes one-by-one |
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# TODO: deep_copy? / merge_deep? |
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foreach (keys %args) { |
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#print "key: $_", "\n"; |
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$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 = $self->getMetaInfo($class); |
#my $metainfo = $self->getMetaInfo($class); |
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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->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 (!$self->{_COREHANDLE}) { |
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#print "no COREHANDLE", "\n"; |
#=pod |
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if (!$self->{lock_info}->{log_lock}) { |
#if (!$self->exists('_COREHANDLE')) { |
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$logger->error( __PACKAGE__ . "[$self->{metainfo}->{type}]" . ": " . "COREHANDLE is undefined while trying to execute method \"$methodname\"" ); |
#if (!$self->{_COREHANDLE}) { |
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if (!$core) { |
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my $err_msg_core = __PACKAGE__ . "[$self->{metainfo}->{type}]" . ": " . "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 (!$self->{lock_info}->{log_lock}) { |
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#$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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#print "calling: $methodname", "\n"; |
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# method calls doing it until here will get dispatched to the proper handler |
# method calls doing it until here will get dispatched to the proper handler |
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return $self->{COREHANDLE}->$methodname(@_); |
return $core->$methodname(@_); |
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} elsif ($self->can($methodname)) { |
} elsif ($self->can($methodname)) { |
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return $self->$methodname(@_); |
return $self->$methodname(@_); |
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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} && ( $self->{COREHANDLE}->$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; |
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print "type: $type"; |
print "type: $type"; |
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eval("use Data::Storage::$type;"); |
eval("use Data::Storage::$type;"); |
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# - build them via anonymous subs |
# - build them via anonymous subs |
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# - introduce them via symbols |
# - introduce them via symbols |
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sub getCOREHANDLE { |
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my $self = shift; |
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$self->_abstract_function('getCOREHANDLE'); |
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} |
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sub sendCommand { |
sub sendCommand { |
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my $self = shift; |
my $self = shift; |
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$self->_abstract_function('sendCommand'); |
$self->_abstract_function('sendCommand'); |
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} |
} |
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sub existsChildNode_tmp { |
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my $self = shift; |
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$self->_abstract_function('existsChildNode'); |
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} |
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sub getChildNodes { |
sub getChildNodes { |
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my $self = shift; |
my $self = shift; |
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$self->_abstract_function('getChildNodes'); |
$self->_abstract_function('getChildNodes'); |
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return; |
return; |
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} |
} |
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sub dropDb { |
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my $self = shift; |
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$self->_abstract_function('dropDb'); |
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return; |
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} |
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sub rebuildDb { |
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my $self = shift; |
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$self->_abstract_function('rebuildDb'); |
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return; |
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} |
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1; |
1; |