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# Manage the POE::Kernel data structures necessary to keep track of |
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# session aliases. |
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package POE::Resource::Aliases; |
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6
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176
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176
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710
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use vars qw($VERSION); |
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248
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176
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8794
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7
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$VERSION = '1.366'; # NOTE - Should be #.### (three decimal places) |
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9
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# These methods are folded into POE::Kernel; |
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package POE::Kernel; |
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12
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176
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176
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use strict; |
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233
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176
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77026
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14
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### The table of session aliases, and the sessions they refer to. |
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16
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my %kr_aliases; |
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# ( $alias => $session_ref, |
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# ..., |
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# ); |
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my %kr_ses_to_alias; |
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# ( $session_id => |
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# { $alias => $session_ref, |
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# ..., |
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# }, |
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# ..., |
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# ); |
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29
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sub _data_alias_initialize { |
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174
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174
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585
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$poe_kernel->[KR_ALIASES] = \%kr_aliases; |
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} |
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33
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sub _data_alias_relocate_kernel_id { |
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4
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my ($self, $old_id, $new_id) = @_; |
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50
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22
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return unless exists $kr_ses_to_alias{$old_id}; |
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0
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0
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$kr_ses_to_alias{$new_id} = delete $kr_ses_to_alias{$old_id}; |
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} |
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39
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### End-run leak checking. Returns true if finalization was ok, or |
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### false if it failed. |
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sub _data_alias_finalize { |
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191
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191
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697
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my $finalized_ok = 1; |
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191
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814
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while (my ($alias, $ses) = each(%kr_aliases)) { |
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0
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0
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_warn "!!! Leaked alias: $alias = $ses\n"; |
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0
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0
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$finalized_ok = 0; |
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} |
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191
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1523
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while (my ($ses_id, $alias_rec) = each(%kr_ses_to_alias)) { |
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0
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0
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my @aliases = keys(%$alias_rec); |
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0
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0
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_warn "!!! Leaked alias cross-reference: $ses_id (@aliases)\n"; |
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0
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0
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$finalized_ok = 0; |
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} |
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191
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376
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return $finalized_ok; |
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} |
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56
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# Add an alias to a session. |
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# |
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# TODO This has a potential problem: setting the same alias twice on a |
59
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# session will increase the session's reference count twice. Removing |
60
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# the alias will only decrement it once. That potentially causes |
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# reference counts that never go away. The public interface for this |
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# function, alias_set(), does not allow this to occur. We should add |
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# a test to make sure it never does. |
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# |
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# TODO It is possible to add aliases to sessions that do not exist. |
66
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# The public alias_set() function prevents this from happening. |
67
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68
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sub _data_alias_add { |
69
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151
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151
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2027
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my ($self, $session, $alias) = @_; |
70
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# _warn( "Session ", $session->ID, " is alias $alias\n" ); |
71
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151
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349
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$self->_data_ses_refcount_inc($session->ID); |
72
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151
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12489
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$kr_aliases{$alias} = $session; |
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151
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493
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$kr_ses_to_alias{$session->ID}->{$alias} = $session; |
74
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} |
75
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76
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# Remove an alias from a session. |
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# |
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# TODO Happily allows the removal of aliases from sessions that don't |
79
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# exist. This will cause problems with reference counting. |
80
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81
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sub _data_alias_remove { |
82
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132
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132
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544
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my ($self, $session, $alias) = @_; |
83
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# _warn( "Session ", $session->ID, " was alias $alias\n" ); |
84
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132
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225
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delete $kr_aliases{$alias}; |
85
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132
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399
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delete $kr_ses_to_alias{$session->ID}->{$alias}; |
86
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132
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676
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$self->_data_ses_refcount_dec($session->ID); |
87
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} |
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89
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### Clear all the aliases from a session. |
90
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91
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sub _data_alias_clear_session { |
92
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791
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791
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1271
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my ($self, $sid) = @_; |
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791
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100
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2293
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return unless exists $kr_ses_to_alias{$sid}; # avoid autoviv |
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127
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184
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while (my ($alias, $ses_ref) = each %{$kr_ses_to_alias{$sid}}) { |
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198
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853
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95
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71
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205
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$self->_data_alias_remove($ses_ref, $alias); |
96
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} |
97
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127
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390
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delete $kr_ses_to_alias{$sid}; |
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} |
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100
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### Resolve an alias. Just an alias. |
101
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102
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sub _data_alias_resolve { |
103
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384
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384
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542
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my ($self, $alias) = @_; |
104
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384
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100
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1093
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return undef unless exists $kr_aliases{$alias}; |
105
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226
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545
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return $kr_aliases{$alias}; |
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} |
107
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108
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### Return a list of aliases for a session. |
109
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110
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sub _data_alias_list { |
111
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8562
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8562
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8040
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my ($self, $sid) = @_; |
112
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8562
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100
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14213
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return () unless exists $kr_ses_to_alias{$sid}; |
113
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8561
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7291
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return sort keys %{$kr_ses_to_alias{$sid}}; |
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8561
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85118
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114
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} |
115
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116
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### Return the number of aliases for a session. |
117
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118
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sub _data_alias_count_ses { |
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4742
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4742
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5842
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my ($self, $sid) = @_; |
120
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4742
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100
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17681
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return 0 unless exists $kr_ses_to_alias{$sid}; |
121
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1486
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1553
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return scalar keys %{$kr_ses_to_alias{$sid}}; |
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1486
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5140
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122
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} |
123
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124
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### Return a session's ID in a form suitable for logging. |
125
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126
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sub _data_alias_loggable { |
127
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37251
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37251
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41149
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my ($self, $sid) = @_; |
128
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37251
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100
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234425
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"session $sid" . ( |
129
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(exists $kr_ses_to_alias{$sid}) |
130
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? ( " (" . join(", ", $self->_data_alias_list($sid)) . ")" ) |
131
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: "" |
132
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); |
133
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} |
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135
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1; |
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137
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__END__ |