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package Reflex::POE::Wheel::Run; |
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# vim: ts=2 sw=2 noexpandtab |
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$Reflex::POE::Wheel::Run::VERSION = '0.100'; |
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362548
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use Moose; |
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extends 'Reflex::POE::Wheel'; |
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1
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5270
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use POE::Wheel::Run; |
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1
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1
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use Reflex::PID; |
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1
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556
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use Reflex::Trait::Watched qw(watches); |
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# TODO - Bored now. use Reflex::Event qw(Flushed Octets Error EOF); ??? |
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1
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use Reflex::Event::Flushed; |
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1
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563
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use Reflex::Event::Octets; |
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581
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use Reflex::Event::Error; |
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use Reflex::Event::EOF; |
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326
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# These are class methods, returning static class data. |
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# TODO - What's the proper way to do this with Moose? |
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my %event_to_index = ( |
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StdinEvent => 0, |
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StdoutEvent => 1, |
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StderrEvent => 2, |
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ErrorEvent => 3, |
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CloseEvent => 4, |
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); |
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28
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sub events_to_indices { |
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0
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return \%event_to_index; |
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} |
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32
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my @index_to_event = ( |
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[ 'Reflex::Event::Flushed', 'stdin', 'wheel_id' ], |
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[ 'Reflex::Event::Octets', 'stdout', 'octets', 'wheel_id' ], |
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[ 'Reflex::Event::Octets', 'stderr', 'octets', 'wheel_id' ], |
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[ |
37
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'Reflex::Event::Error', 'error', 'function', 'number', 'string', 'wheel_id' |
38
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], |
39
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[ 'Reflex::Event::EOF', 'closed', 'wheel_id' ], |
40
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); |
41
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42
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sub index_to_event { |
43
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17
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17
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0
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21
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my ($class, $index) = @_; |
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17
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18
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return @{$index_to_event[$index]}; |
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72
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45
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} |
46
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47
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sub wheel_class { |
48
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2
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2
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1
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5
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return 'POE::Wheel::Run'; |
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} |
50
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51
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sub valid_params { |
52
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return( |
53
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{ |
54
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14
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14
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1
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97
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CloseOnCall => 1, |
55
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Conduit => 1, |
56
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Filter => 1, |
57
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Group => 1, |
58
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NoSetPgrp => 1, |
59
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NoSetSid => 1, |
60
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Priority => 1, |
61
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Program => 1, |
62
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ProgramArgs => 1, |
63
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StderrDriver => 1, |
64
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StderrFilter => 1, |
65
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StdinDriver => 1, |
66
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StdinFilter => 1, |
67
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StdioDriver => 1, |
68
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StdioFilter => 1, |
69
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StdoutDriver => 1, |
70
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StdoutFilter => 1, |
71
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User => 1, |
72
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} |
73
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); |
74
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} |
75
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76
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# Also handle signals. |
77
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78
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watches sigchild_watcher => ( |
79
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isa => 'Maybe[Reflex::PID]', |
80
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role => 'sigchld', |
81
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); |
82
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83
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sub BUILD { |
84
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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 $self = shift; |
85
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86
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2
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64
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$self->sigchild_watcher( |
87
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Reflex::PID->new(pid => $self->wheel()->PID()) |
88
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); |
89
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} |
90
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91
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# Rethrow our signal event. |
92
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sub on_sigchld_exit { |
93
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2
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2
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0
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3
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my ($self, $event) = @_; |
94
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2
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14
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$self->re_emit( $event, -name => 'signal' ); |
95
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} |
96
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97
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sub kill { |
98
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0
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0
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1
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my $self = shift; |
99
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0
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$self->wheel()->kill(@_); |
100
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} |
101
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102
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__PACKAGE__->meta->make_immutable; |
103
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104
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1; |
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106
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__END__ |
107
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108
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=pod |
109
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110
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=encoding UTF-8 |
111
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112
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=for :stopwords Rocco Caputo |
113
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114
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=head1 NAME |
115
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116
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Reflex::POE::Wheel::Run - Represent POE::Wheel::Run as a Reflex class. |
117
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118
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=head1 VERSION |
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120
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This document describes version 0.100, released on April 02, 2017. |
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122
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=head1 SYNOPSIS |
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124
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Unfortunately there isn't a concise, completely executable example for |
125
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the synopsis at this time. Please see eg-07-wheel-run.pl and |
126
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eg-08-watched-trait.pl in the distribution's eg directory for longer |
127
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but fully executable ones. |
128
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129
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watches child => ( |
130
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isa => 'Reflex::POE::Wheel::Run|Undef', |
131
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); |
132
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133
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sub BUILD { |
134
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my $self = shift; |
135
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$self->child( |
136
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Reflex::POE::Wheel::Run->new( |
137
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Program => "$^X -wle 'print qq[pid(\$\$) moo(\$_)] for 1..10; exit'", |
138
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) |
139
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); |
140
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} |
141
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142
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sub on_child_stdout { |
143
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my ($self, $event) = @_; |
144
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print "stdout: ", $event->output(), "\n"; |
145
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} |
146
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147
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sub on_child_close { |
148
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my ($self, $event) = @_; |
149
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print "child closed all output\n"; |
150
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} |
151
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152
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sub on_child_signal { |
153
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my ($self, $event) = @_; |
154
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print "child ", $event->pid(), " exited: ", $event->exit(), "\n"; |
155
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$self->child(undef); |
156
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} |
157
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158
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=head1 DESCRIPTION |
159
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160
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Reflex::POE::Wheel::Run represents an enhanced POE::Wheel::Run object. |
161
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It will manage a child process, and it will also wait for (and report |
162
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on) the corresponding SIGCHLD. |
163
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164
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This module delegates to L<POE::Wheel::Run> for most of its |
165
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implementation. Please refer to that module for implementation |
166
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details. |
167
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168
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=head2 Public Methods |
169
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170
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This class adds public methods specific to POE::Wheel::Run's |
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operation. However, common methods like put() are both implemented |
172
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and documented in the base L<Reflex::POE::Wheel> class. |
173
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174
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=head3 kill |
175
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176
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kill() passes its arguments to POE::Wheel::Run's kill() method. |
177
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178
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=head2 Public Events |
179
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180
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Objects of this class emit all of POE::Wheel::Run's events, albeit |
181
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renamed into Reflex-friendly forms. Generally these forms are |
182
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determined by removing the "Event" suffix and lowercasing what |
183
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remains. POE::Wheel::Run's StdinEvent becomes "stdin", and so on. |
184
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185
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=head3 stdin |
186
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187
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See POE::Wheel::Run's StdinEvent. Within Reflex, this event comes |
188
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with only one parameter: "wheel_id". This is the POE::Wheel::Run |
189
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object's ID. |
190
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191
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=head3 stdout |
192
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193
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See POE::Wheel::Run's StdoutEvent. Reflex includes two parameters: |
194
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"wheel_id" and "output". The latter parameter contains data the child |
195
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process wrote to its STDOUT handle. |
196
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197
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=head3 stderr |
198
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199
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See POE::Wheel::Run's StderrEvent. Reflex includes two parameters: |
200
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"wheel_id" and "output". The latter parameter contains data the child |
201
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process wrote to its STDERR handle. |
202
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203
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=head3 error |
204
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205
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See POE::Wheel::Run's ErrorEvent. Reflex maps the wheel's parameters |
206
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to: "operation", "errnum", "errstr", "wheel_id" and "handle_name", |
207
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respectively. |
208
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209
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=head3 closed |
210
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211
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See POE::Wheel::Run's CloseEvent. Reflex includes only one parameter |
212
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for this event: "wheel_id". |
213
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214
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=for Pod::Coverage BUILD events_to_indices index_to_event on_sigchld_exit |
215
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216
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=head1 CAVEATS |
217
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218
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This class could further be improved so that it doesn't report SIGCHLD |
219
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until all the child's output has been received and processed. This |
220
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would resolve a long-standing nondeterminism in the timing of |
221
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on_child_close() vs. on_child_signal(). |
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=head1 SEE ALSO |
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Please see those modules/websites for more information related to this module. |
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=over 4 |
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=item * |
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L<Reflex|Reflex> |
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L<Moose::Manual::Concepts> |
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=item * |
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L<Reflex> |
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=item * |
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L<Reflex::POE::Event> |
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L<Reflex::POE::Postback> |
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L<Reflex::POE::Session> |
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=item * |
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L<Reflex::POE::Wheel> |
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=item * |
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L<Reflex/ACKNOWLEDGEMENTS> |
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=item * |
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L<Reflex/ASSISTANCE> |
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=item * |
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L<Reflex/AUTHORS> |
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=item * |
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L<Reflex/BUGS> |
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L<Reflex/BUGS> |
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L<Reflex/CONTRIBUTORS> |
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=item * |
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L<Reflex/COPYRIGHT> |
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=item * |
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L<Reflex/LICENSE> |
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=item * |
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L<Reflex/TODO> |
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=back |
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=head1 BUGS AND LIMITATIONS |
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You can make new bug reports, and view existing ones, through the |
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web interface at L<http://rt.cpan.org/Public/Dist/Display.html?Name=Reflex>. |
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=head1 AUTHOR |
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Rocco Caputo <rcaputo@cpan.org> |
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=head1 COPYRIGHT AND LICENSE |
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This software is copyright (c) 2017 by Rocco Caputo. |
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This is free software; you can redistribute it and/or modify it under |
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the same terms as the Perl 5 programming language system itself. |
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=head1 AVAILABILITY |
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The latest version of this module is available from the Comprehensive Perl |
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Archive Network (CPAN). Visit L<http://www.perl.com/CPAN/> to find a CPAN |
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site near you, or see L<https://metacpan.org/module/Reflex/>. |
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=head1 DISCLAIMER OF WARRANTY |
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BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY |
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FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT |
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WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER |
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PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, |
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EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE |
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE |
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SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME |
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THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION. |
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329
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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING |
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|
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR |
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|
REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE |
332
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TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR |
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CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE |
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SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING |
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RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A |
336
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FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF |
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SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
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DAMAGES. |
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340
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=cut |