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package Siebel::Srvrmgr::Log::Enterprise; |
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use Moose 2.0401; |
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use namespace::autoclean 0.13; |
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use File::Copy; |
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use File::Temp qw(tempfile); |
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use Carp qw(cluck confess); |
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use String::BOM 0.3 qw(strip_bom_from_string); |
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our $VERSION = '0.29'; # VERSION |
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=pod |
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=head1 NAME |
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Siebel::Srvrmgr::Log::Enterprise - module to read a Siebel Enterprise log file |
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=head1 SYNOPSIS |
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use Siebel::Srvrmgr::Log::Enterprise; |
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my $enterprise_log = Siebel::Srvrmgr::Log::Enterprise->new( { path => File::Spec->catfile('somewhere', 'under', 'the', 'rainbow')} ); |
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my $next = $enterprise_log->read(); |
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while (my $line = $next->()) { |
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# do something |
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} |
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=head1 DESCRIPTION |
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A class that knows how to read Siebel Enterprise log files: it knows the header details and how to safely read lines from the file. |
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=head1 ATTRIBUTES |
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=head2 path |
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A string with the complete pathname to the Siebel Enterprise log file. |
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This attribute is required during object creation. |
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=cut |
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has path => ( is => 'ro', isa => 'Str', reader => 'get_path', required => 1 ); |
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=head2 eol |
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A string identifying the character(s) used as end-of-line in the Siebel Enterprise log file is configured. |
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This attribute is read-only, this class will automatically try to define the field separator being used. |
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=cut |
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has eol => ( |
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is => 'ro', |
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isa => 'Str', |
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reader => 'get_eol', |
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writer => '_set_eol', |
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default => 0 |
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); |
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=head2 fs |
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A string identifying the character(s) used to separate the fields ("fs" stands for "field separator") in the Siebel Enterprise log file is configured. |
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This attribute is read-only, this class will automatically try to define the EOL being used. |
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=cut |
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has fs => ( |
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is => 'ro', |
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isa => 'Str', |
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reader => 'get_fs', |
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writer => '_set_fs', |
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default => 0 |
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); |
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=head2 fh |
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The file handle reference to the Siebel Enterprise log file, after was opened. |
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=cut |
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has fh => |
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( is => 'ro', isa => 'FileHandle', reader => 'get_fh', writer => '_set_fh' ); |
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=head2 filename |
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The complete path to the temporary filename that this class uses to store the lines of the Siebel Enterprise Log file. |
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=cut |
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has filename => ( |
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is => 'ro', |
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isa => 'Str', |
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reader => 'get_filename', |
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writer => '_set_filename' |
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); |
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100
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=head2 header |
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102
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The header of the Siebel Enterprise log file, without the BOM. |
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=cut |
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106
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has header => ( |
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is => 'ro', |
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isa => 'Str', |
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reader => 'get_header', |
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writer => '_set_header', |
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trigger => \&_check_header |
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); |
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114
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=head1 SEE ALSO |
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116
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=over |
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118
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=item * |
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120
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L<Moose> |
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=item * |
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124
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L<Siebel::Srvrmgr::OS::Unix> |
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126
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=back |
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128
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=head1 METHODS |
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130
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=head2 read |
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132
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Reads the Siebel Enterprise log file, returning a iterator over the lines of the file. |
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134
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The method will try to read the file as safely as possible, copying it to a temporary location before reading. |
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136
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Several attributes will be defined during the file reading, automatically whenever it is possible. In some cases, if unable to |
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define those attributes, an exception will be raised. |
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139
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=cut |
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141
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sub read { |
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143
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1
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5127
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my $self = shift; |
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2
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7
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my $template = __PACKAGE__ . '_XXXXXX'; |
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2
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20
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$template =~ s/\:{2}/_/g; |
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147
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# :TODO:09/18/2015 09:14:14 PM:: insecure, must check if it not possible to keep the file handle, copy the file |
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# over and use seek to go back to the beginning of the file |
149
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2
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29
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my ( $fh, $filename ) = tempfile($template); |
150
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2
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1078
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close($fh); |
151
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2
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121
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copy( $self->get_path(), $filename ); |
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153
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23
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open( $fh, '<:encoding(utf8)', $filename ) |
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787
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154
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or die "Cannot read $filename: $!"; |
155
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2
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23550
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$self->_set_filename($filename); |
156
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2
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55
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my $header = <$fh>; |
157
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158
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# remove BOM, see https://rt.cpan.org/Public/Bug/Display.html?id=101175 |
159
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2
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41
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$header = strip_bom_from_string($header); |
160
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34
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$header =~ s/^\x{feff}//; |
161
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162
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# don't know which EOL is available |
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2
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17
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$header =~ tr/\012//d; |
164
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15
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$header =~ tr/\015//d; |
165
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166
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91
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$self->_set_fh($fh); |
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168
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2
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89
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$self->_set_header($header); |
169
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2
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85
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my $eol = $self->get_eol(); |
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171
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return sub { |
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173
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51
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51
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1624
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local $/ = $eol; |
174
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51
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198
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return <$fh>; |
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176
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} |
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178
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30
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} |
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180
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=head2 DEMOLISH |
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182
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During object termination, the associated temporary log file will be closed and removed automatically, if available. |
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184
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=cut |
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186
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sub DEMOLISH { |
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188
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2
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1
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7
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my $self = shift; |
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190
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2
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84
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my $fh = $self->get_fh(); |
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192
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12
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if ( defined($fh) ) { |
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194
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41
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close($fh); |
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196
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} |
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198
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2
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96
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my $file = $self->get_filename(); |
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200
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105
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if ( ( defined($file) ) and ( -e $self->get_filename() ) ) { |
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202
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unlink $file or cluck "Could not remove $file: $!"; |
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204
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} |
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206
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} |
207
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208
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sub _check_header { |
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210
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2
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2
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8
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my $self = shift; |
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2
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101
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my @parts = split( /\s/, $self->get_header() ); |
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2
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15
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$self->_define_eol( $parts[0] ); |
213
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2
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11
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$self->_define_fs( $parts[9], $parts[10] ); |
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215
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} |
216
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217
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sub _define_fs { |
218
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219
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2
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2
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6
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my $self = shift; |
220
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2
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6
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my $field_del_length = shift; |
221
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2
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5
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my $field_delim = shift; |
222
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2
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7
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my $num; |
223
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224
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2
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11
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for my $i ( 1 .. 4 ) { |
225
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226
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4
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11
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my $temp = chop($field_del_length); |
227
|
4
|
100
|
|
|
|
16
|
if ( $temp != 0 ) { |
228
|
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|
229
|
2
|
|
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|
9
|
$num .= $temp; |
230
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231
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} |
232
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else { |
233
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234
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2
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|
8
|
last; |
235
|
|
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|
|
236
|
|
|
|
|
|
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} |
237
|
|
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|
|
238
|
|
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|
|
|
|
} |
239
|
|
|
|
|
|
|
|
240
|
2
|
50
|
|
|
|
11
|
confess "field delimiter unimplemented" if ( $num > 1 ); |
241
|
|
|
|
|
|
|
|
242
|
|
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|
|
|
|
# converting hex number to the corresponding character as defined in ASCII table |
243
|
2
|
|
|
|
|
108
|
$self->_set_fs( chr( unpack( 's', pack 's', hex($field_delim) ) ) ); |
244
|
|
|
|
|
|
|
|
245
|
|
|
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|
|
|
} |
246
|
|
|
|
|
|
|
|
247
|
|
|
|
|
|
|
sub _define_eol { |
248
|
|
|
|
|
|
|
|
249
|
2
|
|
|
2
|
|
6
|
my $self = shift; |
250
|
2
|
|
|
|
|
7
|
my $part = shift; |
251
|
2
|
|
|
|
|
12
|
my $eol = substr $part, 0, 1; |
252
|
|
|
|
|
|
|
|
253
|
|
|
|
|
|
|
CASE: { |
254
|
|
|
|
|
|
|
|
255
|
2
|
50
|
|
|
|
6
|
if ( $eol eq '2' ) { |
|
2
|
|
|
|
|
8
|
|
256
|
|
|
|
|
|
|
|
257
|
2
|
|
|
|
|
94
|
$self->_set_eol("\015\012"); |
258
|
2
|
|
|
|
|
9
|
last CASE; |
259
|
|
|
|
|
|
|
|
260
|
|
|
|
|
|
|
} |
261
|
|
|
|
|
|
|
|
262
|
0
|
0
|
|
|
|
|
if ( $eol eq '1' ) { |
263
|
|
|
|
|
|
|
|
264
|
0
|
|
|
|
|
|
$self->_set_eol("\012"); |
265
|
0
|
|
|
|
|
|
last CASE; |
266
|
|
|
|
|
|
|
|
267
|
|
|
|
|
|
|
} |
268
|
|
|
|
|
|
|
|
269
|
0
|
0
|
|
|
|
|
if ( $eol eq '0' ) { |
270
|
|
|
|
|
|
|
|
271
|
0
|
|
|
|
|
|
$self->_set_eol("\015"); |
272
|
0
|
|
|
|
|
|
last CASE; |
273
|
|
|
|
|
|
|
|
274
|
|
|
|
|
|
|
} |
275
|
|
|
|
|
|
|
else { |
276
|
|
|
|
|
|
|
|
277
|
0
|
|
|
|
|
|
confess "EOL is custom, don't know what to use!"; |
278
|
|
|
|
|
|
|
|
279
|
|
|
|
|
|
|
} |
280
|
|
|
|
|
|
|
|
281
|
|
|
|
|
|
|
} |
282
|
|
|
|
|
|
|
|
283
|
|
|
|
|
|
|
} |
284
|
|
|
|
|
|
|
|
285
|
|
|
|
|
|
|
=head1 AUTHOR |
286
|
|
|
|
|
|
|
|
287
|
|
|
|
|
|
|
Alceu Rodrigues de Freitas Junior, E<lt>arfreitas@cpan.orgE<gt> |
288
|
|
|
|
|
|
|
|
289
|
|
|
|
|
|
|
=head1 COPYRIGHT AND LICENSE |
290
|
|
|
|
|
|
|
|
291
|
|
|
|
|
|
|
This software is copyright (c) 2015 of Alceu Rodrigues de Freitas Junior, E<lt>arfreitas@cpan.orgE<gt> |
292
|
|
|
|
|
|
|
|
293
|
|
|
|
|
|
|
This file is part of Siebel Monitoring Tools. |
294
|
|
|
|
|
|
|
|
295
|
|
|
|
|
|
|
Siebel Monitoring Tools is free software: you can redistribute it and/or modify |
296
|
|
|
|
|
|
|
it under the terms of the GNU General Public License as published by |
297
|
|
|
|
|
|
|
the Free Software Foundation, either version 3 of the License, or |
298
|
|
|
|
|
|
|
(at your option) any later version. |
299
|
|
|
|
|
|
|
|
300
|
|
|
|
|
|
|
Siebel Monitoring Tools is distributed in the hope that it will be useful, |
301
|
|
|
|
|
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
302
|
|
|
|
|
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
303
|
|
|
|
|
|
|
GNU General Public License for more details. |
304
|
|
|
|
|
|
|
|
305
|
|
|
|
|
|
|
You should have received a copy of the GNU General Public License |
306
|
|
|
|
|
|
|
along with Siebel Monitoring Tools. If not, see <http://www.gnu.org/licenses/>. |
307
|
|
|
|
|
|
|
|
308
|
|
|
|
|
|
|
=cut |
309
|
|
|
|
|
|
|
|
310
|
|
|
|
|
|
|
__PACKAGE__->meta->make_immutable; |