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package XAS::Logmon::Input::Tail; |
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our $VERSION = '0.01'; |
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my $mixin; |
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BEGIN { |
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$mixin = 'XAS::Logmon::Input::Tail::Default'; |
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$mixin = 'XAS::Logmon::Input::Tail::Linux' if ($^O eq 'linux'); |
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$mixin = 'XAS::Logmon::Input::Tail::Win32' if ($^O eq 'MSWin32'); |
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} |
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use Fcntl ':seek'; |
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use XAS::Class |
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debug => 0, |
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version => $VERSION, |
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base => 'XAS::Base', |
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mixin => $mixin, |
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utils => 'dotid trim', |
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accessors => 'notifier statefile', |
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filesystem => 'File', |
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vars => { |
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PARAMS => { |
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-filename => { isa => 'Badger::Filesystem::File' }, |
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} |
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} |
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; |
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#use Data::Dumper; |
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# ---------------------------------------------------------------------- |
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# Public Methods |
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# ---------------------------------------------------------------------- |
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# ---------------------------------------------------------------------- |
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# Private Methods |
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# ---------------------------------------------------------------------- |
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sub _do_tail { |
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my $self = shift; |
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my $pos = $self->_file_position(); |
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$self->log->debug("_do_tail - pos = $pos"); |
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my $fh = $self->filename->open('r'); |
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$fh->seek($pos, SEEK_SET); |
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while (my $line = $fh->getline()) { |
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push(@{$self->{'buffer'}}, trim($line)); |
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} |
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$pos = $fh->tell(); |
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$self->_write_state($pos); |
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$fh->close(); |
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$self->log->debug("_do_tail - pos = $pos"); |
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} |
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sub _file_position { |
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my ($self) = @_; |
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my $state; |
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my @lines; |
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my $pos = 0; |
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my @stat = $self->filename->stat; |
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if ($self->statefile->exists) { |
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@lines = $self->statefile->read; |
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foreach my $line (@lines) { |
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my ($key, $value) = split('\s*=\s*', $line); |
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chop $value; |
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$state->{$key} = $value; |
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} |
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if (($stat[0] eq $state->{'device'}) and |
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($stat[1] eq $state->{'inode'})) { |
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$pos = $state->{'position'}; |
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} |
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} else { |
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$self->_write_state($pos); |
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} |
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return $pos; |
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} |
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sub _write_state { |
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my $self = shift; |
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my $pos = shift; |
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my @stat = $self->filename->stat; |
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my $fh = $self->statefile->open('w'); |
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$fh->printf("inode = %s\n", $stat[1]); |
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$fh->printf("device = %s\n", $stat[0]); |
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$fh->printf("position = %s\n", $pos); |
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$fh->close; |
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} |
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115
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sub init { |
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my $class = shift; |
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my $self = $class->SUPER::init(@_); |
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$self->{'buffer'} = []; |
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$self->{'statefile'} = File($self->filename->volume, $self->filename->directory, '.' . $self->filename->basename . '.logmon'); |
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123
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0
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$self->init_notifier(); |
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125
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0
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return $self; |
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127
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} |
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129
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1; |
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131
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__END__ |