Apache::DBI::Cache::ImaDBI man page on Fedora

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Apache::DBI::Cache::ImUser(Contributed Perl DocumApache::DBI::Cache::ImaDBI(3)

NAME
       Apache::DBI::Cache::ImaDBI - make Apache::DBI::Cache work with
       Class::DBI

SYNOPSIS
	In your httpd.conf:
	 <Perl>
	 use Apache::DBI::Cache ...;
	 use Apache::DBI::Cache::ImaDBI patch=>'Ima::DBI';
	 </Perl>

	Then use Class::DBI in your modules as usual.

	or

	In your httpd.conf:
	 <Perl>
	 use Apache::DBI::Cache ...;
	 use Apache::DBI::Cache::ImaDBI patch=>'My::Class';
	 </Perl>

	 package My::Class;
	 use base qw/Class::DBI/;

	or

	In your httpd.conf:
	 <Perl>
	 use Apache::DBI::Cache ...;
	 </Perl>

	 package My::Class;
	 use base qw/Apache::DBI::Cache::ImaDBI Class::DBI/;

DESCRIPTION
       This module provides one method that is designed to override the way
       Ima::DBI caches its DBI handle. Normally the handle is connected once
       and saved in a closure. With Apache::DBI::Cache::ImaDBI the handle is
       cached by means of Apache::DBI::Cache. Once per Apache request cycle if
       a class is used for this request a handle is obtained from the cache.

       This means:

       ·   A classes DBI handle stays the same over an Apache request cycle
	   but may change between cycles.

       ·   Multiple classes can use the same handle if used in different
	   request cylces.

       ·   If multiple classes use the same database and these classes are
	   used in one request cycle then each class gets its own handle.

USAGE
       Normally your classes are designed to work not only with
       Apache::DBI::Cache.  Hence, your classes don't know also about
       Apache::DBI::Cache::ImaDBI. But your classes inherit from Class::DBI
       and Class::DBI inherits from Ima::DBI.

       To get our special method called Apache::DBI::Cache::ImaDBI is used in
       one of these ways:

	use Apache::DBI::Cache::ImaDBI patch=>1;

	 or

	use Apache::DBI::Cache::ImaDBI patch=>'Ima::DBI';

	 or

	use Apache::DBI::Cache::ImaDBI patch=>'Class::DBI';

	 or

	use Apache::DBI::Cache::ImaDBI patch=>qw[My::Class1 My::Class2];

       The first 2 usages are exactly the same. Our special method is inserted
       directly into Ima::DBI. Thus, all classes based on Ima::DBI inherit it.

       The 3rd usage inserts our method into Class::DBI. Thus, all classes
       based on it inherit our method but classes that are base directly on
       Ima::DBI do not.

       In the 4th case our method is inserted into individual classes only.

       Another way to use Apache::DBI::Cache::ImaDBI is by inheriting from it:

	package My::Class;
	use base qw/Apache::DBI::Cache::ImaDBI Class::DBI/;

	 or

	package My::Class;
	use base qw/Apache::DBI::Cache::ImaDBI Ima::DBI/;

       Here it is necessary that Apache::DBI::Cache::ImaDBI cames before
       Class::DBI or Ima::DBI.

       I think that is not the preferred way because it requires source code
       modification of your classes.

SEE ALSO
       Apache::DBI::Cache
       Class::DBI
       Ima::DBI

AUTHOR
       Torsten Foertsch, <torsten.foertsch@gmx.net>

COPYRIGHT AND LICENSE
       Copyright (C) 2006 by Torsten Foertsch

       This library is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself.

perl v5.14.1			  2006-05-20	 Apache::DBI::Cache::ImaDBI(3)
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