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joko |
1.7 |
## -------------------------------------------------------------------------------- |
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joko |
1.10 |
## $Id: Abstract.pm,v 1.9 2002/12/19 16:30:23 joko Exp $ |
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joko |
1.7 |
## -------------------------------------------------------------------------------- |
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## $Log: Abstract.pm,v $ |
5 |
joko |
1.10 |
## 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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joko |
1.9 |
## 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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joko |
1.8 |
## 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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joko |
1.7 |
## 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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cvsjoko |
1.1 |
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36 |
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package Data::Storage::Handler::Abstract; |
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use strict; |
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use warnings; |
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joko |
1.8 |
use base qw( DesignPattern::Object ); |
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cvsjoko |
1.1 |
use Data::Dumper; |
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joko |
1.7 |
use Tie::SecureHash; |
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#use Data::Storage::Handler; |
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cvsjoko |
1.1 |
|
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# get logger instance |
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my $logger = Log::Dispatch::Config->instance; |
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#our $lock_info; |
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sub new { |
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my $invocant = shift; |
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my $class = ref($invocant) || $invocant; |
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# logging info about the actual handler called |
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$logger->debug( "$invocant->new( @_ )" ); |
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joko |
1.2 |
#$logger->debug( __PACKAGE__ . "->" . "new()" ); |
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cvsjoko |
1.1 |
|
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joko |
1.7 |
# 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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joko |
1.3 |
my $self = { @_ }; |
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# create object from blessed hash-reference |
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bless $self, $class; |
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joko |
1.7 |
=cut |
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joko |
1.10 |
#=pod |
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joko |
1.7 |
# 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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joko |
1.10 |
#=cut |
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joko |
1.7 |
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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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111 |
joko |
1.3 |
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112 |
cvsjoko |
1.1 |
# handle meta data |
113 |
joko |
1.3 |
#my $metainfo = $self->getMetaInfo($class); |
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my $metainfo = $self->getMetaInfo(); |
115 |
cvsjoko |
1.1 |
if (!$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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# direct accessible (non-protected) properties ( was: my $self = { }; ) |
121 |
joko |
1.3 |
$self->{metainfo} = $metainfo; |
122 |
cvsjoko |
1.1 |
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return $self; |
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} |
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joko |
1.10 |
# TODO: use NEXT.pm inside this mechanism (to avoid repetitions...) |
128 |
cvsjoko |
1.1 |
sub AUTOLOAD { |
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# recursion problem to be avoided here!!! |
131 |
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# - problem: we get recursion-hangs!!! => perl stops with ... |
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# "Deep recursion on subroutine "Data::Storage::Handler::Abstract::AUTOLOAD" at [...]/libs/Data/Storage.pm line 38." |
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# - when: if we log to ourselves as a storage-implementation (e.g. via Log::Dispatch::Tangram) |
136 |
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# - why: debug-messages are on a very low level including every data-operation to "Data::Storage(::Handler::X)", |
137 |
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# so e.g. a "$storage->insert" would trigger another "$storage->insert" itself |
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# which leads to a infinite recursion loop (deep recursion) |
139 |
joko |
1.2 |
# - solution: locks! (by Hack or (maybe) via Perl "local"s) |
140 |
cvsjoko |
1.1 |
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my $self = shift; |
142 |
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our $AUTOLOAD; |
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#return if $AUTOLOAD =~ m/::DESTROY$/; |
145 |
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# find out methodname |
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my $methodname = $AUTOLOAD; |
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$methodname =~ s/^.*:://; |
149 |
joko |
1.7 |
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#print "method: $methodname", "\n"; |
151 |
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# TODO: document this! handler-private methods listed here will not be triggered (internal use) |
153 |
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# in this case, "exists" is a method reserved for Tie::SecureHash, |
154 |
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# which encapsulates the perl data structure (HASH) under this object |
155 |
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# this is to prevent deep recursion's |
156 |
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return if lc $methodname eq 'exists'; |
157 |
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158 |
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#print "$methodname - 1", "\n"; |
159 |
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160 |
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# TODO: enhance logging/debugging |
161 |
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#if (!$self->exists('COREHANDLE')) { return; } |
162 |
cvsjoko |
1.1 |
|
163 |
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# handle locking (hack) |
164 |
joko |
1.10 |
if ($self->can('exists') && $self->exists('lock_info') && $self->{lock_info}->{last_method} && $methodname eq $self->{lock_info}->{last_method}) { |
165 |
cvsjoko |
1.1 |
$self->{lock_info}->{log_lock} = 1; |
166 |
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} else { |
167 |
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$self->{lock_info}->{log_lock} = 0; |
168 |
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} |
169 |
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$self->{lock_info}->{last_method} = $methodname; |
170 |
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171 |
joko |
1.7 |
#print "$methodname - 2", "\n"; |
172 |
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173 |
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#print Dumper($self); |
174 |
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#exit; |
175 |
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176 |
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# get corehandle instance from underlying handler |
177 |
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my $core = $self->getCOREHANDLE(); |
178 |
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179 |
cvsjoko |
1.1 |
# test for COREHANDLE |
180 |
joko |
1.7 |
#if (!$self->{_COREHANDLE}) { |
181 |
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#=pod |
182 |
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#if (!$self->exists('_COREHANDLE')) { |
183 |
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#if (!$self->{_COREHANDLE}) { |
184 |
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if (!$core) { |
185 |
joko |
1.10 |
|
186 |
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#print Dumper($self); |
187 |
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#exit; |
188 |
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189 |
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my $handlertype = $self->{metainfo}->{type}; |
190 |
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$handlertype ||= ''; |
191 |
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192 |
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my $err_msg_core = __PACKAGE__ . "[$handlertype]" . ": " . "COREHANDLE is undefined while trying to execute method \"$methodname\""; |
193 |
joko |
1.7 |
print $err_msg_core, "\n"; |
194 |
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if ($self->exists('lock_info') && !$self->{lock_info}->{log_lock}) { |
195 |
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$logger->error( $err_msg_core ); |
196 |
joko |
1.2 |
} |
197 |
cvsjoko |
1.1 |
return; |
198 |
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} |
199 |
joko |
1.7 |
#=cut |
200 |
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201 |
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#print "$methodname - 3", "\n"; |
202 |
cvsjoko |
1.1 |
|
203 |
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# try to dispatch method-call to Storage::Handler::* |
204 |
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#if ($self->can($methodname)) { |
205 |
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#$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->" . $methodname . "(@_)" ); |
206 |
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#my $res = $self->$methodname(@_); |
207 |
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#if ($res) { return $res; } |
208 |
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#} |
209 |
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210 |
joko |
1.7 |
#print "$methodname - 4", "\n"; |
211 |
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212 |
cvsjoko |
1.1 |
# try to dispatch method-call to COREHANDLE |
213 |
joko |
1.7 |
# was: |
214 |
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#my $core = $self->{_COREHANDLE}; |
215 |
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# is: |
216 |
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#my $core = $self->getCOREHANDLE(); |
217 |
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218 |
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#print Dumper($core); |
219 |
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#exit; |
220 |
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221 |
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# was: |
222 |
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#if ($self->{_COREHANDLE}->can($methodname) || $self->{_COREHANDLE}->can("AUTOLOAD")) { |
223 |
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# is: |
224 |
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if ($core->can($methodname) || $core->can("AUTOLOAD")) { |
225 |
cvsjoko |
1.1 |
#$logger->debug( __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" ); |
226 |
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#$lock_AUTOLOAD = 1 if ($methodname eq 'insert'); |
227 |
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if (!$self->{lock_info}->{log_lock}) { |
228 |
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#print "method: $methodname", "\n"; |
229 |
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$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->" . $methodname . "(@_)" ); |
230 |
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} else { |
231 |
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# AUTOLOAD - sub is locked to prevent deep recursions if (e.g.) db-inserts cause log-actions to same db itself |
232 |
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} |
233 |
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#$lock_AUTOLOAD = 0; |
234 |
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#$logger->log( level => 'debug', message => __PACKAGE__ . "->" . $methodname . " (AUTOLOAD)" ); |
235 |
joko |
1.3 |
|
236 |
joko |
1.7 |
#print "calling: $methodname", "\n"; |
237 |
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238 |
joko |
1.10 |
# method calls making it until here will get dispatched to the proper handler |
239 |
joko |
1.7 |
return $core->$methodname(@_); |
240 |
joko |
1.6 |
|
241 |
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} elsif ($self->can($methodname)) { |
242 |
joko |
1.10 |
# try to call specified method inside our or inherited module(s) scope(s) |
243 |
joko |
1.6 |
return $self->$methodname(@_); |
244 |
cvsjoko |
1.1 |
} |
245 |
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246 |
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} |
247 |
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248 |
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sub DESTROY { |
249 |
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my $self = shift; |
250 |
joko |
1.7 |
#if ($self->{COREHANDLE}) { |
251 |
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if ($self->exists('_COREHANDLE')) { |
252 |
cvsjoko |
1.1 |
$logger->debug( __PACKAGE__ . "[$self->{metainfo}->{type}]" . "->DESTROY" ); |
253 |
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254 |
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my $disconnectMethod = $self->{metainfo}->{disconnectMethod}; |
255 |
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256 |
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# call "disconnect" or alike on COREHANDLE |
257 |
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# was: $self->{COREHANDLE}->disconnect(); |
258 |
joko |
1.7 |
$disconnectMethod && $self->{_COREHANDLE} && ( $self->{_COREHANDLE}->$disconnectMethod() ); |
259 |
cvsjoko |
1.1 |
|
260 |
joko |
1.7 |
undef $self->{_COREHANDLE}; |
261 |
cvsjoko |
1.1 |
} |
262 |
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} |
263 |
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264 |
joko |
1.7 |
sub _typeCheck2 { |
265 |
cvsjoko |
1.1 |
my $type = shift; |
266 |
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print "type: $type"; |
267 |
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eval("use Data::Storage::$type;"); |
268 |
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} |
269 |
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270 |
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271 |
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# ==================================================== |
272 |
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# PUBLIC METHODS |
273 |
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# ==================================================== |
274 |
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275 |
joko |
1.3 |
sub existsChildNode { |
276 |
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my $self = shift; |
277 |
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my $nodename = shift; |
278 |
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#$nodename = 'TransactionRoutingTable'; |
279 |
joko |
1.10 |
$logger->debug( __PACKAGE__ . "->existsChildNode( nodename $nodename )" ); |
280 |
joko |
1.3 |
$self->getChildNodes() unless $self->{meta}->{childnodes}; |
281 |
|
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my $result = grep(m/$nodename/i, @{$self->{meta}->{childnodes}}); # TODO: use "/i" only on win32-systems! |
282 |
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return $result; |
283 |
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} |
284 |
cvsjoko |
1.1 |
|
285 |
joko |
1.3 |
sub connect_tmp { |
286 |
cvsjoko |
1.1 |
|
287 |
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# my $self = shift; |
288 |
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# my $connectionString = shift; |
289 |
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# # todo: patch connectionString to $args |
290 |
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# _typeCheck($self->{args}{type}); |
291 |
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292 |
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} |
293 |
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294 |
joko |
1.3 |
|
295 |
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# ==================================================== |
296 |
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# CONCRETE METHOD DUMMIES (croaking via "$logger" by calling "_abstract_function") |
297 |
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# ==================================================== |
298 |
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299 |
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# TODO: |
300 |
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# - abstract "abstract methods" to list/hash to be used in AUTOLOAD |
301 |
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# e.g.: my @ABSTRACT_METHODS = (qw( connect sendCommand getChildNodes )); |
302 |
joko |
1.4 |
# use Class::XYZ (Construct) |
303 |
joko |
1.3 |
# - build them via anonymous subs |
304 |
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# - introduce them via symbols |
305 |
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306 |
joko |
1.7 |
sub getCOREHANDLE { |
307 |
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my $self = shift; |
308 |
|
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$self->_abstract_function('getCOREHANDLE'); |
309 |
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} |
310 |
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311 |
cvsjoko |
1.1 |
sub sendCommand { |
312 |
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my $self = shift; |
313 |
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$self->_abstract_function('sendCommand'); |
314 |
joko |
1.7 |
} |
315 |
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316 |
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sub existsChildNode_tmp { |
317 |
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my $self = shift; |
318 |
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$self->_abstract_function('existsChildNode'); |
319 |
cvsjoko |
1.1 |
} |
320 |
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321 |
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sub getChildNodes { |
322 |
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my $self = shift; |
323 |
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$self->_abstract_function('getChildNodes'); |
324 |
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} |
325 |
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326 |
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sub configureCOREHANDLE { |
327 |
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my $self = shift; |
328 |
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$self->_abstract_function('configureCOREHANDLE'); |
329 |
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} |
330 |
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331 |
joko |
1.3 |
sub getMetaInfo { |
332 |
|
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my $self = shift; |
333 |
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$self->_abstract_function('getMetaInfo'); |
334 |
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return; |
335 |
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} |
336 |
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337 |
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sub getListUnfiltered { |
338 |
|
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my $self = shift; |
339 |
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$self->_abstract_function('getListUnfiltered'); |
340 |
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return; |
341 |
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} |
342 |
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343 |
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sub getListFiltered { |
344 |
|
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my $self = shift; |
345 |
|
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$self->_abstract_function('getListFiltered'); |
346 |
|
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return; |
347 |
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} |
348 |
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349 |
|
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sub sendQuery { |
350 |
|
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my $self = shift; |
351 |
|
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$self->_abstract_function('sendQuery'); |
352 |
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return; |
353 |
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} |
354 |
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355 |
|
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sub connect { |
356 |
|
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my $self = shift; |
357 |
|
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$self->_abstract_function('connect'); |
358 |
|
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return; |
359 |
|
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} |
360 |
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361 |
|
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sub testIntegrity { |
362 |
|
|
my $self = shift; |
363 |
|
|
$self->_abstract_function('testIntegrity'); |
364 |
|
|
return; |
365 |
|
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} |
366 |
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367 |
|
|
sub quoteSql { |
368 |
|
|
my $self = shift; |
369 |
|
|
$self->_abstract_function('quoteSql'); |
370 |
joko |
1.4 |
return; |
371 |
|
|
} |
372 |
|
|
|
373 |
|
|
sub eraseAll { |
374 |
|
|
my $self = shift; |
375 |
|
|
$self->_abstract_function('eraseAll'); |
376 |
|
|
return; |
377 |
|
|
} |
378 |
|
|
|
379 |
|
|
sub createDb { |
380 |
|
|
my $self = shift; |
381 |
|
|
$self->_abstract_function('createDb'); |
382 |
joko |
1.9 |
return; |
383 |
|
|
} |
384 |
|
|
|
385 |
|
|
sub dropDb { |
386 |
|
|
my $self = shift; |
387 |
|
|
$self->_abstract_function('dropDb'); |
388 |
|
|
return; |
389 |
|
|
} |
390 |
|
|
|
391 |
|
|
sub rebuildDb { |
392 |
|
|
my $self = shift; |
393 |
|
|
$self->_abstract_function('rebuildDb'); |
394 |
joko |
1.3 |
return; |
395 |
|
|
} |
396 |
|
|
|
397 |
|
|
1; |