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package Win32::SqlServer::DTS;
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=head1 NAME
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Win32::SqlServer::DTS - Perl classes to access Microsoft SQL Server 2000 DTS Packages
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=head1 DESCRIPTION
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9
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Although it's possible to use all features here by using only C module, C (being more specific, it's
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childs classes) provides a much easier interface (pure Perl) and (hopefully) a better documentation.
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The API for this class will give only read access to a package attributes. No write methods are available are
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directly available at this time, but could be executed since at each DTS object created a related object is
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passed as an reference to new object. This related object is a MS SQL Server DTS object and has all methods and
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properties as defined by the MS API. This object reference is kept as an "private" property called C<_sibling>
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and generally can be obtained with a C method call. Once the reference is recovered, all methods from it
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are available.
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The C class does not much: it will server only as an interface class, since it cannot be instancied or the
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available methods be called directly (as an abstracted class). The inheritance will help only to make available
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easier (and globally) access to the methods C and C.
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=head2 Why having all this trouble?
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You may be asking yourself why having all this trouble to write such API as an layer to access data thought C
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module.
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The very simple reason is: MS SQL Server 2000 API is terrible to work with (lots and lots of indirection), the
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documentation is not as good as it should be and one has to convert examples from it of VBScript code to Perl.
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C API was created to provide an easier (and more "perlish") way to fetch data from a DTS package.
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One can use this API to easily create reports or implement automatic tests using a module
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as L (see EXAMPLES directory in the tarball distribution of this module).
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Current development state should be considered BETA, despite the API is already usable. There is a high chance that the
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interface changes during next releases, so be careful when updating.
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=head2 EXPORT
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Nothing.
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=cut
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44
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10793
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use strict;
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557
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use warnings;
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335
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16785
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use Data::Dumper;
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168680
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1011
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use Carp qw(confess);
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647
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11248
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use Devel::AssertOS qw(MSWin32);
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33080
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181
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50
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our $VERSION = '0.10';
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=head2 METHODS
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=head3 get_sibling
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Returns the relationed DTS object. All objects holds an reference to the original DTS object once is instantiated,
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unless the C is executed.
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If the reference is not available, it will abort program execution with an error.
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=cut
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63
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sub get_sibling {
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my $self = shift;
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if ( exists( $self->{_sibling} ) ) {
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return $self->{_sibling};
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}
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else {
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74
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confess
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"The reference to the original DTS object is not more available\n";
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}
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}
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81
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=head3 is_sibling_ok
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Validates if the attribute _sibling is defined and has a valid value. Returns true if it's ok, false otherwise.
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85
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=cut
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87
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sub is_sibling_ok {
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89
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my $self = shift;
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91
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if ( ( exists( $self->{_sibling} ) )
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and ( $self->{_sibling}->isa('Win32::OLE') ) )
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{
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95
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return 1;
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97
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}
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else {
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100
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return 0;
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102
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}
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104
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}
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106
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=head3 kill_sibling
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108
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This method will simple delete the key (or attribute, if you prefer) C<_sibling> from the hash reference used by all classes that inherints from
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DTS class. Once the key is removed, the Perl garbage collector will remove the related object created using the MS SQL
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Server 2000.
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112
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The reasons of why doing such thing is described in L.
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114
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=cut
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116
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sub kill_sibling {
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118
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my $self = shift;
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delete $self->{_sibling};
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121
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}
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123
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=head3 debug
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125
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Uses the L C function to print to C the properties of a given object
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that inherints from C (almost of all classes in the API).
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128
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The way this is implemented is to do a dirty I of the original object, but without the C<_sibling>
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attribute. This allows to quickly check the object state. This is not as good as it could be, but sometimes
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the Perl debugger dies while checking DTS objects, so it's better than nothing.
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132
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Maybe in the future this method is replaced to turn on debug mode for all methods calls using C module.
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134
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=cut
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136
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sub debug {
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138
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my $self = shift;
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my $clone;
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141
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foreach my $key ( keys( %{$self} ) ) {
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143
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next if ( $key eq '_sibling' );
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$clone->{$key} = $self->{$key};
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147
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}
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149
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bless $clone, ref($self);
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151
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print Dumper($clone);
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153
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}
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155
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1;
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__END__
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