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58 RT::Shredder - Permanently wipeout data from RT
65 rt-shredder --force --plugin 'Tickets=query,Queue="General" and Status="deleted"'
69 RT::Shredder is extension to RT which allows you to permanently wipeout
70 data from the RT database. Shredder supports the wiping of almost
71 all RT objects (Tickets, Transactions, Attachments, Users...).
74 =head2 "Delete" vs "Wipeout"
76 RT uses the term "delete" to mean "deactivate". To avoid confusion,
77 RT::Shredder uses the term "Wipeout" to mean "permanently erase" (or
78 what most people would think of as "delete").
81 =head2 Why do you want this?
83 Normally in RT, "deleting" an item simply deactivates it and makes it
84 invisible from view. This is done to retain full history and
85 auditability of your tickets. For most RT users this is fine and they
86 have no need of RT::Shredder.
88 But in some large and heavily used RT instances the database can get
89 clogged up with junk, particularly spam. This can slow down searches
90 and bloat the size of the database. For these users, RT::Shredder
91 allows them to completely clear the database of this unwanted junk.
93 An additional use of Shredder is to obliterate sensitive information
94 (passwords, credit card numbers, ...) which might have made their way
98 =head2 Command line tools (CLI)
100 L<rt-shredder> is a program which allows you to wipe objects from
101 command line or with system tasks scheduler (cron, for example).
102 See also 'rt-shredder --help'.
105 =head2 Web based interface (WebUI)
107 Shredder's WebUI integrates into RT's WebUI. You can find it in the
108 Configuration->Tools->Shredder tab. The interface is similar to the
109 CLI and gives you the same functionality. You can find 'Shredder' link
110 at the bottom of tickets search results, so you could wipeout tickets
111 in the way similar to the bulk update.
114 =head1 DATA STORAGE AND BACKUPS
116 Shredder allows you to store data you wiped in files as scripts with SQL
119 =head3 Restoring from backup
121 Should you wipeout something you did not intend to the objects can be
122 restored by using the storage files. These files are a simple set of
123 SQL commands to re-insert your objects into the RT database.
125 1) Locate the appropriate shredder SQL dump file. In the WebUI, when
126 you use shredder, the path to the dump file is displayed. It also
127 gives the option to download the dump file after each wipeout. Or
128 it can be found in your C<$ShredderStoragePath>.
130 2) Load the shredder SQL dump into your RT database. The details will
131 be different for each database and RT configuration, consult your
132 database manual and RT config. For example, in MySQL...
134 mysql -u your_rt_user -p your_rt_database < /path/to/rt/var/data/shredder/dump.sql
136 That's it.i This will restore everything you'd deleted during a
137 shredding session when the file had been created.
141 =head2 $DependenciesLimit
143 Shredder stops with an error if the object has more than
144 C<$DependenciesLimit> dependencies. For example: a ticket has 1000
145 transactions or a transaction has 1000 attachments. This is protection
146 from bugs in shredder from wiping out your whole database, but
147 sometimes when you have big mail loops you may hit it.
149 Defaults to 1000. To change this (for example, to 10000) add the
150 following to your F<RT_SiteConfig.pm>:
152 Set( $DependenciesLimit, 10_000 );>
155 =head2 $ShredderStoragePath
157 Directory containing Shredder backup dumps; defaults to
158 F</opt/rt4/var/data/RT-Shredder> (assuming an /opt/rt4 installation).
160 To change this (for example, to /some/backup/path) add the following to
161 your F<RT_SiteConfig.pm>:
163 Set( $ShredderStoragePath, "/some/backup/path" );>
165 Be sure to specify an absolute path.
168 =head1 INFORMATION FOR DEVELOPERS
172 L<RT::Shredder> is an extension to RT which adds shredder methods to
173 RT objects and classes. The API is not well documented yet, but you
174 can find usage examples in L<rt-shredder> and the
175 F<lib/t/regression/shredder/*.t> test files.
177 However, here is a small example that do the same action as in CLI
178 example from L</SYNOPSIS>:
181 RT::Shredder::Init( force => 1 );
182 my $deleted = RT::Tickets->new( RT->SystemUser );
183 $deleted->{'allow_deleted_search'} = 1;
184 $deleted->LimitQueue( VALUE => 'general' );
185 $deleted->LimitStatus( VALUE => 'deleted' );
186 while( my $t = $deleted->Next ) {
191 =head2 RT::Shredder class' API
193 L<RT::Shredder> implements interfaces to objects cache, actions on the
194 objects in the cache and backups storage.
198 our $VERSION = '0.04';
203 # I can't use 'use lib' here since it breakes tests
204 # because test suite uses old RT::Shredder setup from
207 ### after: push @INC, qw(@RT_LIB_PATH@);
208 use RT::Shredder::Constants;
209 use RT::Shredder::Exceptions;
213 require RT::Shredder::Record;
215 require RT::Shredder::ACE;
216 require RT::Shredder::Attachment;
217 require RT::Shredder::CachedGroupMember;
218 require RT::Shredder::CustomField;
219 require RT::Shredder::CustomFieldValue;
220 require RT::Shredder::GroupMember;
221 require RT::Shredder::Group;
222 require RT::Shredder::Link;
223 require RT::Shredder::Principal;
224 require RT::Shredder::Queue;
225 require RT::Shredder::Scrip;
226 require RT::Shredder::ScripAction;
227 require RT::Shredder::ScripCondition;
228 require RT::Shredder::Template;
229 require RT::Shredder::ObjectCustomFieldValue;
230 require RT::Shredder::Ticket;
231 require RT::Shredder::Transaction;
232 require RT::Shredder::User;
235 our @SUPPORTED_OBJECTS = qw(
250 ObjectCustomFieldValue
260 RT::Shredder::Init( %default_options );
262 C<RT::Shredder::Init()> should be called before creating an
263 RT::Shredder object. It iniitalizes RT and loads the RT
266 %default_options are passed to every C<<RT::Shredder->new>> call.
281 my $shredder = RT::Shredder->new(%options);
283 Construct a new RT::Shredder object.
285 There currently are no %options.
292 my $self = bless( {}, ref $proto || $proto );
300 $self->{'opt'} = { %opt, @_ };
301 $self->{'cache'} = {};
302 $self->{'resolver'} = {};
303 $self->{'dump_plugins'} = [];
306 =head4 CastObjectsToRecords( Objects => undef )
308 Cast objects to the C<RT::Record> objects or its ancesstors.
309 Objects can be passed as SCALAR (format C<< <class>-<id> >>),
310 ARRAY, C<RT::Record> ancesstors or C<RT::SearchBuilder> ancesstor.
312 Most methods that takes C<Objects> argument use this method to
313 cast argument value to list of records.
315 Returns an array of records.
319 my @objs = $shredder->CastObjectsToRecords(
320 Objects => [ # ARRAY reference
321 'RT::Attachment-10', # SCALAR or SCALAR reference
322 $tickets, # RT::Tickets object (isa RT::SearchBuilder)
323 $user, # RT::User object (isa RT::Record)
329 sub CastObjectsToRecords
332 my %args = ( Objects => undef, @_ );
335 my $targets = delete $args{'Objects'};
337 RT::Shredder::Exception->throw( "Undefined Objects argument" );
340 if( UNIVERSAL::isa( $targets, 'RT::SearchBuilder' ) ) {
341 #XXX: try to use ->_DoSearch + ->ItemsArrayRef in feature
342 # like we do in Record with links, but change only when
343 # more tests would be available
344 while( my $tmp = $targets->Next ) { push @res, $tmp };
345 } elsif ( UNIVERSAL::isa( $targets, 'RT::Record' ) ) {
347 } elsif ( UNIVERSAL::isa( $targets, 'ARRAY' ) ) {
348 foreach( @$targets ) {
349 push @res, $self->CastObjectsToRecords( Objects => $_ );
351 } elsif ( UNIVERSAL::isa( $targets, 'SCALAR' ) || !ref $targets ) {
352 $targets = $$targets if ref $targets;
353 my ($class, $id) = split /-/, $targets;
354 $class = 'RT::'. $class unless $class =~ /^RTx?::/i;
355 eval "require $class";
356 die "Couldn't load '$class' module" if $@;
357 my $obj = $class->new( RT->SystemUser );
358 die "Couldn't construct new '$class' object" unless $obj;
360 unless ( $obj->id ) {
361 $RT::Logger->error( "Couldn't load '$class' object with id '$id'" );
362 RT::Shredder::Exception::Info->throw( 'CouldntLoadObject' );
364 die "Loaded object has different id" unless( $id eq $obj->id );
367 RT::Shredder::Exception->throw( "Unsupported type ". ref $targets );
374 =head4 PutObjects( Objects => undef )
376 Puts objects into cache.
378 Returns array of the cache entries.
380 See C<CastObjectsToRecords> method for supported types of the C<Objects>
388 my %args = ( Objects => undef, @_ );
391 for( $self->CastObjectsToRecords( Objects => delete $args{'Objects'} ) ) {
392 push @res, $self->PutObject( %args, Object => $_ )
398 =head4 PutObject( Object => undef )
400 Puts record object into cache and returns its cache entry.
402 B<NOTE> that this method support B<only C<RT::Record> object or its ancesstor
403 objects>, if you want put mutliple objects or objects represented by different
404 classes then use C<PutObjects> method instead.
411 my %args = ( Object => undef, @_ );
413 my $obj = $args{'Object'};
414 unless( UNIVERSAL::isa( $obj, 'RT::Record' ) ) {
415 RT::Shredder::Exception->throw( "Unsupported type '". (ref $obj || $obj || '(undef)')."'" );
418 my $str = $obj->_AsString;
419 return ($self->{'cache'}->{ $str } ||= { State => ON_STACK, Object => $obj } );
422 =head4 GetObject, GetState, GetRecord( String => ''| Object => '' )
424 Returns record object from cache, cache entry state or cache entry accordingly.
426 All three methods takes C<String> (format C<< <class>-<id> >>) or C<Object> argument.
427 C<String> argument has more priority than C<Object> so if it's not empty then methods
428 leave C<Object> argument unchecked.
430 You can read about possible states and their meanings in L<RT::Shredder::Constants> docs.
442 if( $args{'String'} && $args{'Object'} ) {
444 Carp::croak( "both String and Object args passed" );
446 return $args{'String'} if $args{'String'};
447 return $args{'Object'}->_AsString if UNIVERSAL::can($args{'Object'}, '_AsString' );
451 sub GetObject { return (shift)->GetRecord( @_ )->{'Object'} }
452 sub GetState { return (shift)->GetRecord( @_ )->{'State'} }
456 my $str = $self->_ParseRefStrArgs( @_ );
457 return $self->{'cache'}->{ $str };
460 =head3 Dependencies resolvers
462 =head4 PutResolver, GetResolvers and ApplyResolvers
464 TODO: These methods have no documentation.
477 unless( UNIVERSAL::isa( $args{'Code'} => 'CODE' ) ) {
478 die "Resolver '$args{Code}' is not code reference";
483 $self->{'resolver'}->{ $args{'BaseClass'} } ||= {}
484 )->{ $args{'TargetClass'} || '' } ||= []
486 unshift @$resolvers, $args{'Code'};
500 if( $args{'TargetClass'} && exists $self->{'resolver'}->{ $args{'BaseClass'} }->{ $args{'TargetClass'} } ) {
501 push @res, @{ $self->{'resolver'}->{ $args{'BaseClass'} }->{ $args{'TargetClass'} || '' } };
503 if( exists $self->{'resolver'}->{ $args{'BaseClass'} }->{ '' } ) {
504 push @res, @{ $self->{'resolver'}->{ $args{'BaseClass'} }->{''} };
513 my %args = ( Dependency => undef, @_ );
514 my $dep = $args{'Dependency'};
516 my @resolvers = $self->GetResolvers(
517 BaseClass => $dep->BaseClass,
518 TargetClass => $dep->TargetClass,
521 unless( @resolvers ) {
522 RT::Shredder::Exception::Info->throw(
524 error => "Couldn't find resolver for dependency '". $dep->AsString ."'",
529 BaseObject => $dep->BaseObject,
530 TargetObject => $dep->TargetObject,
531 ) foreach @resolvers;
540 while ( my ($k, $v) = each %{ $self->{'cache'} } ) {
541 next if $v->{'State'} & (WIPED | IN_WIPING);
542 $self->Wipeout( Object => $v->{'Object'} );
551 die "Couldn't begin transaction" unless $RT::Handle->BeginTransaction;
552 $mark = $self->PushDumpMark or die "Couldn't get dump mark";
553 $self->_Wipeout( @_ );
554 $self->PopDumpMark( Mark => $mark );
555 die "Couldn't commit transaction" unless $RT::Handle->Commit;
559 $RT::Handle->Rollback('force');
560 $self->RollbackDumpTo( Mark => $mark ) if $mark;
561 die $error if RT::Shredder::Exception::Info->caught;
562 die "Couldn't wipeout object: $error";
569 my %args = ( CacheRecord => undef, Object => undef, @_ );
571 my $record = $args{'CacheRecord'};
572 $record = $self->PutObject( Object => $args{'Object'} ) unless $record;
573 return if $record->{'State'} & (WIPED | IN_WIPING);
575 $record->{'State'} |= IN_WIPING;
576 my $object = $record->{'Object'};
578 $self->DumpObject( Object => $object, State => 'before any action' );
580 unless( $object->BeforeWipeout ) {
581 RT::Shredder::Exception->throw( "BeforeWipeout check returned error" );
584 my $deps = $object->Dependencies( Shredder => $self );
586 WithFlags => DEPENDS_ON | VARIABLE,
587 Callback => sub { $self->ApplyResolvers( Dependency => $_[0] ) },
589 $self->DumpObject( Object => $object, State => 'after resolvers' );
592 WithFlags => DEPENDS_ON,
593 WithoutFlags => WIPE_AFTER | VARIABLE,
594 Callback => sub { $self->_Wipeout( Object => $_[0]->TargetObject ) },
596 $self->DumpObject( Object => $object, State => 'after wiping dependencies' );
599 $record->{'State'} |= WIPED; delete $record->{'Object'};
600 $self->DumpObject( Object => $object, State => 'after wipeout' );
603 WithFlags => DEPENDS_ON | WIPE_AFTER,
604 WithoutFlags => VARIABLE,
605 Callback => sub { $self->_Wipeout( Object => $_[0]->TargetObject ) },
607 $self->DumpObject( Object => $object, State => 'after late dependencies' );
612 sub ValidateRelations
617 foreach my $record( values %{ $self->{'cache'} } ) {
618 next if( $record->{'State'} & VALID );
619 $record->{'Object'}->ValidateRelations( Shredder => $self );
623 =head3 Data storage and backups
625 =head4 GetFileName( FileName => '<ISO DATETIME>-XXXX.sql', FromStorage => 1 )
627 Takes desired C<FileName> and flag C<FromStorage> then translate file name to absolute
630 * Default value of the C<FileName> option is C<< <ISO DATETIME>-XXXX.sql >>;
632 * if C<FileName> has C<XXXX> (exactly four uppercase C<X> letters) then it would be changed with digits from 0000 to 9999 range, with first one free value;
634 * if C<FileName> has C<%T> then it would be replaced with the current date and time in the C<YYYY-MM-DDTHH:MM:SS> format. Note that using C<%t> may still generate not unique names, using C<XXXX> recomended.
636 * if C<FromStorage> argument is true (default behaviour) then result path would always be relative to C<StoragePath>;
638 * if C<FromStorage> argument is false then result would be relative to the current dir unless it's already absolute path.
640 Returns an absolute path of the file.
643 # file from storage with default name format
644 my $fname = $shredder->GetFileName;
646 # file from storage with custom name format
647 my $fname = $shredder->GetFileName( FileName => 'shredder-XXXX.backup' );
649 # file with path relative to the current dir
650 my $fname = $shredder->GetFileName(
652 FileName => 'backups/shredder.sql',
655 # file with absolute path
656 my $fname = $shredder->GetFileName(
658 FileName => '/var/backups/shredder-XXXX.sql'
666 my %args = ( FileName => '', FromStorage => 1, @_ );
669 my $file = $args{'FileName'} || '%t-XXXX.sql';
670 if( $file =~ /\%t/i ) {
672 my $date_time = POSIX::strftime( "%Y%m%dT%H%M%S", gmtime );
673 $file =~ s/\%t/$date_time/gi;
676 # convert to absolute path
677 if( $args{'FromStorage'} ) {
678 $file = File::Spec->catfile( $self->StoragePath, $file );
679 } elsif( !File::Spec->file_name_is_absolute( $file ) ) {
680 $file = File::Spec->rel2abs( $file );
684 if( $file =~ /XXXX[^\/\\]*$/ ) {
685 my( $tmp, $i ) = ( $file, 0 );
689 $tmp =~ s/XXXX([^\/\\]*)$/sprintf("%04d", $i).$1/e;
690 } while( -e $tmp && $i < 9999 );
696 die "File '$file' exists, but is read-only";
699 unless( File::Spec->file_name_is_absolute( $file ) ) {
700 $file = File::Spec->rel2abs( $file );
704 my $dir = File::Spec->join( (File::Spec->splitpath( $file ))[0,1] );
705 unless( -e $dir && -d _) {
706 die "Base directory '$dir' for file '$file' doesn't exist";
709 die "Base directory '$dir' is not writable";
712 die "'$file' is not regular file";
720 Returns an absolute path to the storage dir. See
721 L<CONFIGURATION/$ShredderStoragePath>.
723 See also description of the L</GetFileName> method.
729 return scalar( RT->Config->Get('ShredderStoragePath') )
730 || File::Spec->catdir( $RT::VarPath, qw(data RT-Shredder) );
733 my %active_dump_state = ();
736 my %args = ( Object => undef, Name => 'SQLDump', Arguments => undef, @_ );
738 my $plugin = $args{'Object'};
740 require RT::Shredder::Plugin;
741 $plugin = RT::Shredder::Plugin->new;
742 my( $status, $msg ) = $plugin->LoadByName( $args{'Name'} );
743 die "Couldn't load dump plugin: $msg\n" unless $status;
745 die "Plugin is not of correct type" unless lc $plugin->Type eq 'dump';
747 if ( my $pargs = $args{'Arguments'} ) {
748 my ($status, $msg) = $plugin->TestArgs( %$pargs );
749 die "Couldn't set plugin args: $msg\n" unless $status;
752 my @applies_to = $plugin->AppliesToStates;
753 die "Plugin doesn't apply to any state" unless @applies_to;
754 $active_dump_state{ lc $_ } = 1 foreach @applies_to;
756 push @{ $self->{'dump_plugins'} }, $plugin;
763 my %args = (Object => undef, State => undef, @_);
764 die "No state passed" unless $args{'State'};
765 return unless $active_dump_state{ lc $args{'State'} };
767 foreach (@{ $self->{'dump_plugins'} }) {
768 next unless grep lc $args{'State'} eq lc $_, $_->AppliesToStates;
769 my ($state, $msg) = $_->Run( %args );
770 die "Couldn't run plugin: $msg" unless $state;
774 { my $mark = 1; # XXX: integer overflows?
778 foreach (@{ $self->{'dump_plugins'} }) {
779 my ($state, $msg) = $_->PushMark( Mark => $mark );
780 die "Couldn't push mark: $msg" unless $state;
786 foreach (@{ $self->{'dump_plugins'} }) {
787 my ($state, $msg) = $_->PushMark( @_ );
788 die "Couldn't pop mark: $msg" unless $state;
793 foreach (@{ $self->{'dump_plugins'} }) {
794 my ($state, $msg) = $_->RollbackTo( @_ );
795 die "Couldn't rollback to mark: $msg" unless $state;
805 =head2 Database transactions support
807 Since 0.03_01 RT::Shredder uses database transactions and should be
808 much safer to run on production servers.
812 Mainstream RT doesn't use FKs, but at least I posted DDL script that creates them
813 in mysql DB, note that if you use FKs then this two valid keys don't allow delete
814 Tickets because of bug in MySQL:
816 ALTER TABLE Tickets ADD FOREIGN KEY (EffectiveId) REFERENCES Tickets(id);
817 ALTER TABLE CachedGroupMembers ADD FOREIGN KEY (Via) REFERENCES CachedGroupMembers(id);
819 L<http://bugs.mysql.com/bug.php?id=4042>
821 =head1 BUGS AND HOW TO CONTRIBUTE
823 We need your feedback in all cases: if you use it or not,
824 is it works for you or not.
828 Don't skip C<make test> step while install and send me reports if it's fails.
829 Add your own tests, it's easy enough if you've writen at list one perl script
830 that works with RT. Read more about testing in F<t/utils.pl>.
834 Send reports to L</AUTHOR> or to the RT mailing lists.
838 Many bugs in the docs: insanity, spelling, gramar and so on.
839 Patches are wellcome.
843 Please, see Todo file, it has some technical notes
844 about what I plan to do, when I'll do it, also it
845 describes some problems code has.
849 Since RT-3.7 shredder is a part of the RT distribution.
850 Versions of the RTx::Shredder extension could
851 be downloaded from the CPAN. Those work with older
852 RT versions or you can find repository at
853 L<https://opensvn.csie.org/rtx_shredder>
857 Ruslan U. Zakirov <Ruslan.Zakirov@gmail.com>
861 This program is free software; you can redistribute
862 it and/or modify it under the same terms as Perl itself.
864 The full text of the license can be found in the
869 L<rt-shredder>, L<rt-validator>