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## |
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# NAME |
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# Pixie::LiveObjectManager - manages in-memory cache of objects |
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# |
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# SYNOPSIS |
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# use Pixie::LiveObjectManager; |
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# |
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# my $obj_manager = Pixie::LiveObjectManager->new->set_pixie( $pixie ); |
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# my $obj = Foo->new; |
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# |
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# # insert weak copy of $obj into the cache: |
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# my ($oid) = $obj_manager->cache_insert( $obj ); |
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# my $obj2 = $obj_manager->cache_get( $oid ); |
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# print $obj_manager->cache_size; |
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# ... for $obj_manager->cache_keys; |
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# $obj_manager->cache_delete( $oid ); |
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# |
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# # still dunno about this one: |
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# $obj_manager->bind_object_to_oid( $obj_holder => $oid ); |
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# |
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# $obj_manager->lock_strategy_for |
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# $obj_manager->lock_object / $obj_manager->unlock_object |
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# |
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## |
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package Pixie::LiveObjectManager; |
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54323
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use strict; |
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use Carp qw( confess ); |
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3432
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use Scalar::Util qw( blessed weaken isweak ); |
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1289
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use Pixie::Object; |
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use Pixie::ObjectInfo; |
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use Pixie::FinalMethods; |
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use base qw( Pixie::Object ); |
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3866
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our $VERSION = "2.08_02"; |
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sub init { |
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0
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54
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my $self = shift; |
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148
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$self->{_live_cache} = {}; |
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return $self; |
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} |
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46
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#----------------------------------------------------------------------------- |
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# Cache methods |
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#----------------------------------------------------------------------------- |
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50
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sub cache_insert { |
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32
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0
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1019
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my $self = shift; |
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52
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my $obj = shift; |
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54
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confess( "can't insert a Pixie::ObjectInfo into the cache!" ) |
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if $obj->isa('Pixie::ObjectInfo'); |
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57
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32
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133
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my $info = $obj->PIXIE::get_info; |
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125
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my $oid = $info->_oid; |
59
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60
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19
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116
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no warnings 'uninitialized'; |
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40
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19
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18839
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61
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32
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50
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33
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418
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if ( length($oid) && ! defined($self->{_live_cache}{$oid}) ) { |
62
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32
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164
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weaken( $self->{_live_cache}{$oid} = $info ); |
63
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# $info->set_lock_strategy(Pixie->get_the_current_lock_strategy); |
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} |
65
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66
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32
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111
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return $oid => $obj; |
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} |
68
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69
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sub cache_get { |
70
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3
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3
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0
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6210
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my $self = shift; |
71
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3
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7
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my($oid) = @_; |
72
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73
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3
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50
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23
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defined $oid or return; |
74
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3
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100
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24
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if ( defined $self->{_live_cache}{$oid} ) { |
75
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2
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16
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return $self->{_live_cache}{$oid}->the_object; |
76
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} |
77
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else { |
78
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1
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4
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return; |
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} |
80
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} |
81
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82
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sub cache_delete { |
83
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24
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24
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0
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1009
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my $self = shift; |
84
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24
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54
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my($oid) = @_; |
85
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24
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50
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104
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$oid = $self->get_oid_for($oid) if blessed( $oid ); |
86
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24
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108
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delete $self->{_live_cache}{$oid}; |
87
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} |
88
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89
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sub cache_size { |
90
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11
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11
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0
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1909
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my $self = shift; |
91
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11
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15
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scalar keys %{$self->{_live_cache}}; |
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11
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62
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92
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} |
93
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94
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sub cache_keys { |
95
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2
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2
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0
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5
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my $self = shift; |
96
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2
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3
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keys %{$self->{_live_cache}}; |
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2
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11
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97
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} |
98
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99
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#----------------------------------------------------------------------------- |
100
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# Live Object Management |
101
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#----------------------------------------------------------------------------- |
102
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103
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## TODO: use an accessor for pixie |
104
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sub set_pixie { |
105
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26
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26
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0
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849
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my $self = shift; |
106
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26
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74
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$self->{pixie} = shift; |
107
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26
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141
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weaken $self->{pixie}; |
108
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26
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91
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return $self; |
109
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} |
110
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111
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sub bind_object_to_oid { |
112
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4
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4
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0
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59
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my $self = shift; |
113
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4
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10
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my($obj, $oid) = @_; |
114
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4
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66
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14
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my $info = $self->get_info_for_oid($oid) || $obj->PIXIE::get_info; |
115
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116
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# TODO: what happens if $obj != $info->the_object ? |
117
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4
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50
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21
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$info->set_the_object($obj) unless defined($info->the_object); |
118
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4
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28
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$info->set__oid($oid); |
119
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4
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18
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$info->set_pixie($self->{pixie}); |
120
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4
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33
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19
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$info->set_lock_strategy( Pixie->get_the_current_lock_strategy || |
121
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$self->{pixie}->lock_strategy ); |
122
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4
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22
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$obj->PIXIE::set_info($info); |
123
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} |
124
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125
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sub lock_object { |
126
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1
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1
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0
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1201
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my $self = shift; |
127
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1
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2
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my($obj) = @_; |
128
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129
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1
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3
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$self->assert_ownership_of($obj); |
130
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1
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68
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$self->{pixie}->store->lock_object_for(scalar($self->get_oid_for($obj)), |
131
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$self->{pixie}); |
132
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} |
133
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134
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sub unlock_object { |
135
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3
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3
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0
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655
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my $self = shift; |
136
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3
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5
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my($obj) = @_; |
137
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138
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3
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9
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$self->assert_ownership_of($obj); |
139
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3
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232
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$self->{pixie}->store->unlock_object_for(scalar($self->get_oid_for($obj)), |
140
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$self->{pixie}); |
141
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} |
142
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143
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sub assert_ownership_of { |
144
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6
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6
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0
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114
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my $self = shift; |
145
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6
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11
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my($obj) = @_; |
146
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6
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100
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39
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confess( "The object is not managed by this pixie!" ) unless |
147
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$self->{pixie}->manages_object($obj); |
148
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} |
149
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150
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sub lock_strategy_for { |
151
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2
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2
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0
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548
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my $self = shift; |
152
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2
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4
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my $oid = shift; |
153
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2
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6
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my $info = $self->get_info_for($oid); |
154
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155
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# TODO: eek! this a bad place to act as an accessor... |
156
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# maybe set_lock_strategy_for(), or just let caller do it? |
157
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2
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100
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7
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if (@_) { |
158
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1
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6
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$info->set_lock_strategy(@_); |
159
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} |
160
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161
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2
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8
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$info->lock_strategy; |
162
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} |
163
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164
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sub get_info_for { |
165
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5
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5
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0
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437
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my $self = shift; |
166
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5
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7
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my $thing = shift; |
167
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5
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100
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28
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return blessed($thing) |
168
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? $thing->PIXIE::get_info |
169
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: $self->get_info_for_oid( $thing ); |
170
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} |
171
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172
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sub get_info_for_oid { |
173
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7
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7
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0
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11
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my $self = shift; |
174
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7
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10
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my $oid = shift; |
175
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7
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42
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$self->{_live_cache}{$oid}; |
176
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} |
177
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178
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sub get_oid_for { |
179
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6
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6
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0
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594
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my $self = shift; |
180
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6
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9
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my $obj = shift; |
181
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182
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6
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50
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33
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51
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return unless defined( $obj ) && blessed $obj; |
183
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confess( "Can't get oid for a Pixie::ObjectInfo!" ) |
184
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6
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100
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11
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if eval { $obj->isa('Pixie::ObjectInfo') }; |
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6
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74
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185
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186
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5
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24
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$obj->PIXIE::oid |
187
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} |
188
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189
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sub DESTROY { |
190
|
23
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23
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|
99
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my $self = shift; |
191
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23
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49
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local $@; # protect $@ |
192
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23
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47
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foreach my $obj (grep defined, |
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23
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244
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193
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|
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map $_->the_object, |
194
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grep defined, |
195
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|
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values %{ $self->{_live_cache} }) |
196
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{ |
197
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2
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6
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eval { $self->unlock_object( $obj ) }; |
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2
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7
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198
|
2
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70
|
$obj->PIXIE::set_info( undef ); |
199
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} |
200
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} |
201
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202
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1; |