/[cvs]/nfo/perl/libs/Data/Transfer/Sync/StorageInterface.pm
ViewVC logotype

Diff of /nfo/perl/libs/Data/Transfer/Sync/StorageInterface.pm

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1.1 by joko, Mon Jan 20 16:58:46 2003 UTC revision 1.6 by joko, Fri Feb 21 01:47:53 2003 UTC
# Line 6  Line 6 
6  ##  ##
7  ##    ----------------------------------------------------------------------------------------  ##    ----------------------------------------------------------------------------------------
8  ##    $Log$  ##    $Log$
9    ##    Revision 1.6  2003/02/21 01:47:53  joko
10    ##    renamed core function
11    ##
12    ##    Revision 1.5  2003/02/20 20:24:33  joko
13    ##    + additional pre-flight checks
14    ##
15    ##    Revision 1.4  2003/02/14 14:14:38  joko
16    ##    + new code refactored here
17    ##
18    ##    Revision 1.3  2003/02/11 07:54:55  joko
19    ##    + modified module usage
20    ##    + debugging trials
21    ##
22    ##    Revision 1.2  2003/02/09 05:05:58  joko
23    ##    + major structure changes
24    ##    - refactored code to sister modules
25    ##    + refactored code to this place
26    ##
27  ##    Revision 1.1  2003/01/20 16:58:46  joko  ##    Revision 1.1  2003/01/20 16:58:46  joko
28  ##    + initial check-in: here they are....  ##    + initial check-in: here they are....
29  ##  ##
# Line 25  use mixin::with qw( Data::Transfer::Sync Line 43  use mixin::with qw( Data::Transfer::Sync
43    
44  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -   main  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -   main
45    
 # get logger instance  
 my $logger = Log::Dispatch::Config->instance;  
   
46  use Data::Dumper;  use Data::Dumper;
47    use Hash::Merge qw( merge );
48    use libdb qw( hash2Sql );
49    use Data::Transform::Deep qw( merge_to );
50    
51    
52    # get logger instance
53    my $logger = Log::Dispatch::Config->instance;
54    
55  # this is a shortcut method  # this is a shortcut method
56  # ... let's try to avoid _any_ redundant code in here (ok... - at the cost of method lookups...)  # ... let's try to avoid _any_ redundant code in here (ok... - at the cost of method lookups...)
# Line 37  sub _getNodeList { Line 58  sub _getNodeList {
58    my $self = shift;    my $self = shift;
59    my $descent = shift;    my $descent = shift;
60    my $filter = shift;    my $filter = shift;
61      $logger->debug( __PACKAGE__ . "->_getNodeList( descent=$descent, accessorName=$self->{meta}->{$descent}->{accessorName} )" );
62    #$results ||= $self->{source}->getListUnfiltered($self->{meta}->{source}->{node});    #$results ||= $self->{source}->getListUnfiltered($self->{meta}->{source}->{node});
63    #$results ||= $self->{meta}->{source}->{storage}->getListUnfiltered($self->{meta}->{source}->{node});    #$results ||= $self->{meta}->{source}->{storage}->getListUnfiltered($self->{meta}->{source}->{node});
64    my $list = $self->{meta}->{$descent}->{storage}->getListFiltered($self->{meta}->{$descent}->{nodeName}, $filter);    my $list = $self->{meta}->{$descent}->{storage}->getListFiltered($self->{meta}->{$descent}->{accessorName}, $filter);
65  #print Dumper($list);  #print Dumper($list);
66    return $list;    return $list;
67  }  }
# Line 48  sub _resolveNodeIdent { Line 70  sub _resolveNodeIdent {
70    my $self = shift;    my $self = shift;
71    my $descent = shift;    my $descent = shift;
72        
73    #print Dumper($self->{node}->{$descent});    # trace
74        #print Dumper($self->{node}->{$descent});
75        #print Dumper($self);
76        #exit;
77        
78      $logger->debug( __PACKAGE__ . "->_resolveNodeIdent( descent=$descent, accessorName=$self->{meta}->{$descent}->{accessorName} )" );
79        
80    # get to the payload    # get to the payload
81      #my $item = $specifier->{item};      #my $item = $specifier->{item};
# Line 59  sub _resolveNodeIdent { Line 86  sub _resolveNodeIdent {
86      #my $ident = $self->{$descent}->id($item);      #my $ident = $self->{$descent}->id($item);
87      #my $ident = $self->{meta}->{$descent}->{storage}->id($item);      #my $ident = $self->{meta}->{$descent}->{storage}->id($item);
88    
89      # trace
90        #print Dumper($self->{meta}->{$descent});
91        #exit;
92    
93      my $ident;      my $ident;
94      my $provider_method = $self->{meta}->{$descent}->{IdentProvider}->{method};      my $provider_method = $self->{meta}->{$descent}->{IdentProvider}->{method};
95      my $provider_arg = $self->{meta}->{$descent}->{IdentProvider}->{arg};      my $provider_arg = $self->{meta}->{$descent}->{IdentProvider}->{arg};
96    
97      #print "provider_method: $provider_method", "\n";      # trace
98      #print "provider_arg: $provider_arg", "\n";        #print "provider_method: $provider_method", "\n";
99          #print "provider_arg: $provider_arg", "\n";
100          #print Dumper($payload);
101    
102      # resolve to ident      # resolve to ident
103      if (lc $provider_method eq 'property') {      if (lc $provider_method eq 'property') {
# Line 103  sub _statloadNode { Line 136  sub _statloadNode {
136    my $ident = shift;    my $ident = shift;
137    my $force = shift;    my $force = shift;
138    
139    =pod
140      #print "isa: ", UNIVERSAL::isa($self->{meta}->{$descent}->{storage}), "\n";
141    
142      # this seems to be the first time we access this side,
143      # so just check (again) for a valid storage handle
144      if (! ref $self->{meta}->{$descent}->{storage}) {
145        $logger->critical( __PACKAGE__ . "->_statloadNode( descent=$descent ident=$ident ): Storage handle undefined!" );
146        return;
147      }
148    =cut
149    
150      #$logger->debug( __PACKAGE__ . "->_statloadNode( descent=$descent ident=$ident )" );
151    
152    # fetch entry to retrieve checksum from    # fetch entry to retrieve checksum from
153    # was:    # was:
154    if (!$self->{node}->{$descent} || $force) {    if (!$self->{node}->{$descent} || $force) {
# Line 119  sub _statloadNode { Line 165  sub _statloadNode {
165        return;        return;
166      }      }
167    
168  #print "yai!", "\n";      #print Dumper($self->{meta});
169    
170      my $query = {      my $query = {
171        node => $self->{meta}->{$descent}->{nodeName},        node => $self->{meta}->{$descent}->{accessorName},
172        subnodes => [qw( cs )],        subnodes => [qw( cs )],
173        criterias => [        criterias => [
174          { key => $self->{meta}->{$descent}->{IdentProvider}->{arg},          { key => $self->{meta}->{$descent}->{IdentProvider}->{arg},
# Line 131  sub _statloadNode { Line 177  sub _statloadNode {
177        ]        ]
178      };      };
179    
180  print Dumper($query);      # trace
181          #print "query:", "\n";
182      my $result = $self->{meta}->{$descent}->{storage}->sendQuery($query);        #print Dumper($query);
183    
184      my $entry = $result->getNextEntry();      # send query and fetch first entry from result
185          my $result = $self->{meta}->{$descent}->{storage}->sendQuery($query);
186  #print Dumper($entry);        my $entry = $result->getNextEntry();
187  #print "pers: " . $self->{meta}->{$descent}->{storage}->is_persistent($entry), "\n";  
188  #my $state = $self->{meta}->{$descent}->{storage}->_fetch_object_state($entry, { name => 'TransactionHop' } );      # trace
189  #print Dumper($state);        #print Dumper($entry);
190          #print "pers: " . $self->{meta}->{$descent}->{storage}->is_persistent($entry), "\n";
191          #my $state = $self->{meta}->{$descent}->{storage}->_fetch_object_state($entry, { name => 'TransactionHop' } );
192          #print Dumper($state);
193    
194      my $status = $result->getStatus();      # be informed about the status of the query
195          my $status = $result->getStatus();
196    
197  #print Dumper($status);  #print Dumper($status);
198            
# Line 183  print Dumper($query); Line 233  print Dumper($query);
233  }  }
234    
235    
236    sub _touchNodeSet {
237      my $self = shift;
238    
239      $logger->debug( __PACKAGE__ . "->touchNodeSet" );
240    
241      # check descents/nodes: does descent exist / is node available?
242      foreach my $descent (keys %{$self->{meta}}) {
243        
244        # 1. check metadata of descent(s)
245          if (!$self->{meta}->{$descent}) {
246            $logger->critical( __PACKAGE__ . "->touchNodeSet: Could not find descent '$descent' in configuration metadata." );
247            next;
248          }
249    
250        # 2. check storage handle(s)
251          my $dbkey = $self->{meta}->{$descent}->{dbKey};
252          if (!$self->{meta}->{$descent}->{storage}) {
253            $logger->critical( __PACKAGE__ . "->touchNodeSet: Could not access storage ( descent='$descent', dbKey='$dbkey' ) - configuration-error?" );
254            next;
255          }
256        
257        # 2.b check storage handle type
258          my $dbType = $self->{meta}->{$descent}->{storage}->{locator}->{type};
259          if (!$dbType) {
260            $logger->critical( __PACKAGE__ . "->touchNodeSet: Storage ( descent='$descent', dbKey='$dbkey' ) has no 'dbType' - configuration-error?" );
261            next;
262          }
263    
264        # 3. check if descents (and nodes?) are actually available....
265          # TODO:
266          # eventually pre-check mode of access-attempt (read/write) here to provide an "early-croak" if possible
267        
268        # trace
269          # print Dumper($self->{meta}->{$descent}->{storage}->{locator});
270    
271    
272          my $nodeName = $self->{meta}->{$descent}->{nodeName};
273          my $accessorType = $self->{meta}->{$descent}->{accessorType};
274          my $accessorName = $self->{meta}->{$descent}->{accessorName};
275    
276    
277        # 4. check nodeset
278    
279        # debug message containing database type and used/determined accessor name
280        $logger->debug( __PACKAGE__ . "->touchNodeSet: Accessing dbType=$dbType, accessorName=$accessorName" );
281        
282        # if target node(s) do(es) not exist, check if we should create it automagically
283        if ($dbType ne 'DBI' && !$self->{meta}->{$descent}->{storage}->existsChildNode($accessorName)) {
284    
285          if ($descent eq 'target' && $self->{options}->{target}->{autocreateFolders}) {
286            if (!$self->{meta}->{$descent}->{storage}->createChildNode($accessorName)) {
287              $logger->critical( __PACKAGE__ . "->touchNodeSet: Could not create node '$self->{meta}->{$descent}->{nodeName}\@$self->{meta}->{$descent}->{dbKey}' [$self->{meta}->{$descent}->{nodeType}]." );
288              next;
289            }
290          } else {
291            $logger->critical( __PACKAGE__ . "->touchNodeSet: Could not reach node \"$nodeName\" (accessorName=$accessorName, accessorType=$accessorType) at descent \"$descent\"" );
292            next;
293          }
294        }
295        
296      }
297    
298      # trace
299        #print Dumper($self->{meta});
300        #exit;
301    
302      
303      return 1;
304    
305    }
306    
307    
308    
309    sub _modifyNode {
310      my $self = shift;
311      my $descent = shift;
312      my $action = shift;
313      my $map = shift;
314      my $crit = shift;
315    
316      # map for new style callbacks
317      my $map_callbacks = {};
318    
319      # checks go first!
320      
321        # TODO: this should be reviewed first - before extending  ;-)
322        # TODO: this should be extended:
323        # count this cases inside the caller to this sub and provide a better overall message
324        # if this counts still zero in the end:
325        #     "No nodes have been touched for modify: Do you have column-headers in your csv file?"
326        if (not defined $self->{node}) {
327          #$logger->critical( __PACKAGE__ . "->_modifyNode failed: \"$descent\" node is empty." );
328          #return;
329        }
330    
331      # transfer callback nodes from value map to callback map - handle them afterwards! - (new style callbacks)
332      if (my $callbacks = $self->{meta}->{$descent}->{Callback}) {
333        foreach my $callback (keys %{$callbacks->{write}}) {
334          $map_callbacks->{write}->{$callback} = $map->{$callback};
335          delete $map->{$callback};
336        }
337      }
338      
339      
340      # trace
341        #print Dumper($self->{meta});
342    
343    
344      # --------------------------------------------------------------------------
345      # DBI speaks SQL
346      if ($self->{meta}->{$descent}->{storage}->{locator}->{type} eq 'DBI') {
347    
348        # trace
349          #print Dumper($map);
350          #delete $map->{cs};
351    
352        # transfer data
353          # TODO: wrap this around '$storageHandle->sendQuery(...)'!?
354          my $sql_main;
355          if (lc($action) eq 'insert') {
356            $sql_main = hash2Sql($self->{meta}->{$descent}->{accessorName}, $map, 'SQL_INSERT');
357          } elsif (lc $action eq 'update') {
358            $crit ||= "$self->{meta}->{$descent}->{IdentProvider}->{arg}='$self->{node}->{$descent}->{ident}'";
359            $sql_main = hash2Sql($self->{meta}->{$descent}->{accessorName}, $map, 'SQL_UPDATE', $crit);
360          }
361          my $sqlHandle = $self->{meta}->{$descent}->{storage}->sendCommand($sql_main);
362    
363        # handle errors
364          if ($sqlHandle->err) {
365            #if ($self->{args}->{debug}) { print "sql-error with statement: $sql_main", "\n"; }
366            $self->{node}->{status}->{error} = {
367              statement => $sql_main,
368              state => $sqlHandle->state,
369              err => $sqlHandle->err,
370              errstr => $sqlHandle->errstr,
371            };
372          } else {
373            $self->{node}->{status}->{ok} = 1;
374          }
375    
376    
377      # --------------------------------------------------------------------------
378      # Tangram does it the oo-way (naturally)
379      } elsif ($self->{meta}->{$descent}->{storage}->{locator}->{type} eq 'Tangram') {
380        my $sql_main;
381        my $object;
382    
383        # determine classname
384        my $classname = $self->{meta}->{$descent}->{nodeType};
385        
386        # attributes/properties to exclude
387          # push declared ones from metadata
388          my @exclude = @{$self->{meta}->{$descent}->{subnodes_exclude}};
389          # push the attributes associated with the identifier
390          if (my $identProvider = $self->{meta}->{$descent}->{IdentProvider}) {
391            push @exclude, $identProvider->{arg};
392          }
393    
394        # trace
395          #print Dumper($self->{meta});
396          #exit;
397    
398        # new feature:
399        #     - check TypeProvider metadata property from other side
400        #     - use argument (arg) inside as a classname for object creation on this side
401        #my $otherSide = $self->_otherSide($descent);
402        if (my $typeProvider = $self->{meta}->{$descent}->{TypeProvider}) {
403          #print Dumper($map);
404          $classname = $map->{$typeProvider->{arg}};
405          # remove nodes from map also (push nodes to "subnodes_exclude" list)
406          push @exclude, $typeProvider->{arg};
407        }
408        
409        # exclude banned properties (remove from map)
410        #map { delete $self->{node}->{map}->{$_} } @{$self->{args}->{exclude}};
411        map { delete $map->{$_} } @exclude;
412    
413        # list of properties
414        my @props = keys %{$map};
415    
416        # transfer data
417        if (lc $action eq 'insert') {
418    
419          # make the object persistent in four steps:
420          #   - raw create (perl / class tangram scope)
421          #   - orm insert (tangram scope)   ... this establishes inheritance - don't try to fill in inherited properties before!
422          #      is this a Tangram bug?
423          #   - raw fill-in from hash (perl scope)
424          #   - orm update (tangram scope)  ... this updates all properties just filled in
425          
426          
427          # ==========================
428          # TODO: REVIEW HERE!!!
429          # can't we achieve this more elegant?
430          #   o use DesignPattern::Object???
431          #   o use Hash::Merge!!! (take care about the cloning behaviour)
432          
433            # check if object exists (is classname a valid perl package/module?)
434    
435              # we can just check if the classname is valid here
436              if (!$classname) {
437                $logger->critical( __PACKAGE__ . "->_modifyNode: classname is undefined" );
438                # FIXME: stop syncing here?
439                return;
440              }
441            
442              # try to match against the classes known by Class::Tangram
443              # FIXME: do "/i" on win32 only!
444              my $classname_find = quotemeta($classname);
445              if (!grep(m/$classname_find/i, Class::Tangram::known_classes())) {
446                $logger->critical( __PACKAGE__ . "->_modifyNode: Classname '$classname' is not known by Class::Tangram" );
447                # FIXME: stop syncing here?
448                return;
449              }
450          
451            # create new object ...
452              # V1
453                # build array to initialize object
454                #my @initarray = ();
455                #map { push @initarray, $_, undef; } @props;
456                #my $object = $classname->new( @initarray );
457              # V2
458                $object = $classname->new();
459              # V3
460                # $object = DesignPattern::Object->new($data);
461    
462            # ... pass to orm first ...
463            $self->{meta}->{$descent}->{storage}->insert($object);
464      
465            # ... and initialize with empty (undef'd) properties afterwards.
466            map { $object->{$_} = undef; } @props;
467      
468            # trace
469              #print "\n";
470              #print Dumper($map);
471              #print Dumper($object);
472              #exit;
473    
474            # mix in (merge) values ...
475              # TODO: use Hash::Merge here? benchmark!
476              # no! we'd need a Object::Merge here! it's *...2object*
477              merge_to($object, $map);
478      
479            # trace
480              #print Dumper($object);
481              #exit;
482    
483          # TODO: REVIEW HERE!!!
484          # ==========================
485    
486          # ... and re-update@orm.
487            $self->{meta}->{$descent}->{storage}->update($object);
488    
489          # asymmetry: get ident after insert
490          # TODO:
491          #   - just do this if it is an IdentAuthority
492          #   - use IdentProvider metadata here
493    #print Dumper($self->{meta}->{$descent});
494          my $oid = $self->{meta}->{$descent}->{storage}->id($object);
495    #print "oid: $oid", "\n";
496          $self->{node}->{$descent}->{ident} = $oid;
497    
498    
499        } elsif (lc $action eq 'update') {
500          
501          # get fresh object from orm first
502          $object = $self->{meta}->{$descent}->{storage}->load($self->{node}->{$descent}->{ident});
503    
504    #print Dumper($self->{node});
505          
506          # mix in values
507            #print Dumper($object);
508            # TODO: use Hash::Merge here???
509            merge_to($object, $map);
510            #print Dumper($object);
511            #exit;
512    
513          # update orm
514            $self->{meta}->{$descent}->{storage}->update($object);
515            
516        }
517    
518    #exit;
519        
520        my $error = 0;
521    
522        # handle new style callbacks - this is a HACK - do this without an eval!
523        #print Dumper($map);
524        #print "cb: ", Dumper($self->{meta}->{$descent}->{Callback});
525        #print Dumper($map_callbacks);
526        foreach my $node (keys %{$map_callbacks->{write}}) {
527          #print Dumper($node);
528    
529          # ------------  half-redundant: make $self->callCallback($object, $value, $opts)
530          my $perl_callback = $self->{meta}->{$descent}->{nodeType} . '::' . $node . '_write';
531          my $evalstring = $perl_callback . '( { object => $object, value => $map_callbacks->{write}->{$node}, storage => $self->{meta}->{$descent}->{storage} } );';
532          #print $evalstring, "\n"; exit;
533          eval($evalstring);
534          if ($@) {
535            $error = 1;
536            $logger->error( __PACKAGE__ . "->_modifyNode: $@" );
537            next;
538          }
539          # ------------  half-redundant: make $self->callCallback($object, $value, $opts)
540          
541          #print "after eval", "\n";
542          
543          if (!$error) {
544            # re-update@orm
545            $self->{meta}->{$descent}->{storage}->update($object);
546          }
547        }
548      
549        # handle errors
550        if ($error) {
551          #print "error", "\n";
552    =pod
553          my $sqlHandle;
554          #if ($self->{args}->{debug}) { print "sql-error with statement: $sql_main", "\n"; }
555          $self->{node}->{status}->{error} = {
556            statement => $sql_main,
557            state => $sqlHandle->state,
558            err => $sqlHandle->err,
559            errstr => $sqlHandle->errstr,
560          };
561    =cut
562          # rollback....
563          #print "rollback", "\n";
564          $self->{meta}->{$descent}->{storage}->erase($object);
565          #print "after rollback", "\n";
566        } else {
567          $self->{node}->{status}->{ok} = 1;
568        }
569    
570      }
571    
572    }
573    
574    sub _erase_all {
575      my $self = shift;
576      my $descent = shift;
577      #my $node = shift;
578      #print Dumper($self->{meta}->{$descent});
579      #my $node = $self->{meta}->{$descent}->{nodeName};
580      my $node = $self->{meta}->{$descent}->{accessorName};
581      $logger->debug( __PACKAGE__ . "->_erase_all( node $node )" );
582      $self->{meta}->{$descent}->{storage}->eraseAll($node);
583    }
584    
585  1;  1;
586    __END__
Legend:
Removed from v.1.1  
changed lines
  Added in v.1.6
MailToCvsAdmin">MailToCvsAdmin
 ViewVC Help
Powered by ViewVC 1.1.26 RSS 2.0 feed