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# This file is part of Riak-Light |
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# |
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# This software is copyright (c) 2013 by Weborama. |
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# |
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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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# |
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## no critic (RequireUseStrict, RequireUseWarnings) |
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package Riak::Light::Timeout::Alarm; |
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{ |
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$Riak::Light::Timeout::Alarm::VERSION = '0.10'; |
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} |
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## use critic |
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60642
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use POSIX qw(ETIMEDOUT ECONNRESET); |
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use Time::HiRes qw(alarm); |
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use Riak::Light::Util qw(is_windows); |
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use Carp; |
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use Moo; |
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use Types::Standard -types; |
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with 'Riak::Light::Timeout'; |
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# ABSTRACT: proxy to read/write using Alarm as a timeout provider ( Not Safe: can clobber previous alarm ) |
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has socket => ( is => 'ro', required => 1 ); |
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has in_timeout => ( is => 'ro', isa => Num, default => sub {0.5} ); |
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has out_timeout => ( is => 'ro', isa => Num, default => sub {0.5} ); |
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has is_valid => ( is => 'rw', isa => Bool, default => sub {1} ); |
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sub BUILD { |
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# from perldoc perlport |
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# alarm: |
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# Emulated using timers that must be explicitly polled whenever |
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# Perl wants to dispatch "safe signals" and therefore cannot |
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# interrupt blocking system calls (Win32) |
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3
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croak "Alarm cannot interrupt blocking system calls in Win32!" |
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if is_windows(); |
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carp "Not Safe: can clobber previous alarm"; |
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} |
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sub clean { |
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0
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$_[0]->socket->close; |
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$_[0]->is_valid(0); |
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} |
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sub sysread { |
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0
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my $self = shift; |
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$self->is_valid |
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or $! = ECONNRESET, |
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return; ## no critic (RequireLocalizedPunctuationVars) |
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3
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my $buffer; |
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3
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my $seconds = $self->in_timeout; |
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3
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my $result = eval { |
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local $SIG{'ALRM'} = sub { croak 'Timeout !' }; |
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alarm($seconds); |
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my $readed = $self->socket->sysread(@_); |
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alarm(0); |
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$buffer = $_[0]; # NECESSARY, timeout does not map the alias @_ !! |
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$readed; |
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}; |
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3
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if ($@) { |
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1
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$self->clean(); |
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1
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$! = ETIMEDOUT; ## no critic (RequireLocalizedPunctuationVars) |
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} |
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else { |
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$_[0] = $buffer; |
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} |
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$result; |
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} |
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sub syswrite { |
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my $self = shift; |
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$self->is_valid |
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or $! = ECONNRESET, |
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return; ## no critic (RequireLocalizedPunctuationVars) |
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my $seconds = $self->out_timeout; |
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my $result = eval { |
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0
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local $SIG{'ALRM'} = sub { croak 'Timeout !' }; |
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0
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alarm($seconds); |
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my $readed = $self->socket->syswrite(@_); |
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alarm(0); |
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$readed; |
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}; |
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if ($@) { |
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0
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$self->clean(); |
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0
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$! = ETIMEDOUT; ## no critic (RequireLocalizedPunctuationVars) |
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} |
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2
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$result; |
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} |
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106
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1; |
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108
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109
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=pod |
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111
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=encoding UTF-8 |
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113
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=head1 NAME |
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Riak::Light::Timeout::Alarm - proxy to read/write using Alarm as a timeout provider ( Not Safe: can clobber previous alarm ) |
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117
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=head1 VERSION |
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version 0.10 |
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121
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=head1 DESCRIPTION |
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123
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Internal class |
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125
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=head1 AUTHORS |
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127
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=over 4 |
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129
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=item * |
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131
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Tiago Peczenyj |
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133
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=item * |
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135
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Damien Krotkine |
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137
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=back |
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139
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=head1 COPYRIGHT AND LICENSE |
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141
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This software is copyright (c) 2013 by Weborama. |
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143
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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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146
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=cut |
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148
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149
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__END__ |