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package Sprocket::Session; |
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use warnings; |
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use strict; |
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use POE; |
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1533
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use base qw(POE::Session); |
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use Errno qw(ENOSYS); |
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3732
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our $VERSION = '0.01'; |
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sub _invoke_state { |
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140
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my ($self, $source_session, $state, $etc, $file, $line, $fromstate) = @_; |
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# Trace the state invocation if tracing is enabled. |
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140
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50
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if ($self->[POE::Session::SE_OPTIONS]->{+POE::Session::OPT_TRACE}) { |
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0
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POE::Kernel::_warn( |
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$POE::Kernel::poe_kernel->ID_session_to_id($self), |
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" -> $state (from $file at $line)\n" |
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); |
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} |
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# The desired destination state doesn't exist in this session. |
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# Attempt to redirect the state transition to _default. |
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140
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100
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unless (exists $self->[POE::Session::SE_STATES]->{$state}) { |
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# There's no _default either; redirection's not happening today. |
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# Drop the state transition event on the floor, and optionally |
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# make some noise about it. |
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unless (exists $self->[POE::Session::SE_STATES]->{+POE::Session::EN_DEFAULT}) { |
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0
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$! = ENOSYS; |
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0
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0
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0
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if ($self->[POE::Session::SE_OPTIONS]->{+POE::Session::OPT_DEFAULT} and $state ne POE::Session::EN_SIGNAL) { |
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0
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my $loggable_self = |
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$POE::Kernel::poe_kernel->_data_alias_loggable($self); |
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0
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POE::Kernel::_warn( |
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"a '$state' event was sent from $file at $line to $loggable_self ", |
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"but $loggable_self has neither a handler for it ", |
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"nor one for _default\n" |
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); |
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} |
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0
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return undef; |
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} |
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# If we get this far, then there's a _default state to redirect |
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# the transition to. Trace the redirection. |
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if ($self->[POE::Session::SE_OPTIONS]->{+POE::Session::OPT_TRACE}) { |
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0
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POE::Kernel::_warn( |
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$POE::Kernel::poe_kernel->ID_session_to_id($self), |
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" -> $state redirected to _default\n" |
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); |
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} |
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# Transmogrify the original state transition into a corresponding |
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# _default invocation. ARG1 is copied from $etc so it can't be |
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# altered from a distance. |
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$etc = [ $state, [@$etc] ]; |
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$state = POE::Session::EN_DEFAULT; |
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} |
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# If we get this far, then the state can be invoked. So invoke it |
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# already! |
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69
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# Package and object states are invoked this way. |
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SWITCH: { |
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140
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100
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129
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if ( $state eq POE::Session::EN_DEFAULT |
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617
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&& ( $etc->[0] =~ m/^([^\|]+)\/(.*)/ ) ) { |
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201
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last SWITCH unless ( $1 && $2 ); |
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my ( $heap, $nstate ) = ( $1, $2 ); |
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# does this state exist in this session? |
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my $om = $self->[POE::Session::SE_STATES]->{ $nstate }; |
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unless( $om ) { |
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$om = $self->[POE::Session::SE_STATES]->{ POE::Session::EN_DEFAULT }; |
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} |
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last SWITCH unless( $om ); |
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# does this object have this method? |
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my ( $object, $method ) = @$om; |
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#last SWITCH unless ( $object->can( $method ) ); |
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if ( $object->{heap} = $object->{heaps}->{ $heap } ) { |
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my $ret; |
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if ( $method eq POE::Session::EN_DEFAULT ) { |
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$method = POE::Session::EN_DEFAULT; |
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$ret = |
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$object->$method( # package/object (implied) |
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$self, # session |
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$POE::Kernel::poe_kernel, # kernel |
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$object->{heap}, # heap |
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$nstate, # state |
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$source_session, # sender |
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undef, # unused #6 |
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$file, # caller file name |
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$line, # caller file line |
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$fromstate, # caller state |
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$nstate, # original event |
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@{$etc->[1]} # args |
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); |
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} else { |
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$ret = |
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$object->$method( # package/object (implied) |
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$self, # session |
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$POE::Kernel::poe_kernel, # kernel |
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$object->{heap}, # heap |
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$nstate, # state |
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$source_session, # sender |
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undef, # unused #6 |
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$file, # caller file name |
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$line, # caller file line |
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$fromstate, # caller state |
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@{$etc->[1]} # args |
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); |
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} |
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$object->{heap} = undef; |
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122
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return $ret; |
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} |
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} |
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} |
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127
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# Inline states are invoked this way. |
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284
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if (ref($self->[POE::Session::SE_STATES]->{$state}) eq 'CODE') { |
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return $self->[POE::Session::SE_STATES]->{$state}-> |
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( undef, # object |
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$self, # session |
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$POE::Kernel::poe_kernel, # kernel |
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$self->[POE::Session::SE_NAMESPACE], # heap |
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$state, # state |
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$source_session, # sender |
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undef, # unused #6 |
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$file, # caller file name |
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$line, # caller file line |
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$fromstate, # caller state |
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@$etc # args |
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); |
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} |
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145
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146
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my ($object, $method) = @{$self->[POE::Session::SE_STATES]->{$state}}; |
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return |
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$object->$method # package/object (implied) |
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( $self, # session |
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$POE::Kernel::poe_kernel, # kernel |
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$self->[POE::Session::SE_NAMESPACE], # heap |
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$state, # state |
153
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$source_session, # sender |
154
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undef, # unused #6 |
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$file, # caller file name |
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$line, # caller file line |
157
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$fromstate, # caller state |
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@$etc # args |
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); |
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} |
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162
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1; |