1Apache::DBI::Cache::ImaUDsBeIr(3C)ontributed Perl DocumeAnptaacthieo:n:DBI::Cache::ImaDBI(3)
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NAME

6       Apache::DBI::Cache::ImaDBI - make Apache::DBI::Cache work with
7       Class::DBI
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SYNOPSIS

10        In your httpd.conf:
11         <Perl>
12         use Apache::DBI::Cache ...;
13         use Apache::DBI::Cache::ImaDBI patch=>'Ima::DBI';
14         </Perl>
15
16        Then use Class::DBI in your modules as usual.
17
18        or
19
20        In your httpd.conf:
21         <Perl>
22         use Apache::DBI::Cache ...;
23         use Apache::DBI::Cache::ImaDBI patch=>'My::Class';
24         </Perl>
25
26         package My::Class;
27         use base qw/Class::DBI/;
28
29        or
30
31        In your httpd.conf:
32         <Perl>
33         use Apache::DBI::Cache ...;
34         </Perl>
35
36         package My::Class;
37         use base qw/Apache::DBI::Cache::ImaDBI Class::DBI/;
38

DESCRIPTION

40       This module provides one method that is designed to override the way
41       Ima::DBI caches its DBI handle. Normally the handle is connected once
42       and saved in a closure. With Apache::DBI::Cache::ImaDBI the handle is
43       cached by means of Apache::DBI::Cache. Once per Apache request cycle if
44       a class is used for this request a handle is obtained from the cache.
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46       This means:
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48       •   A classes DBI handle stays the same over an Apache request cycle
49           but may change between cycles.
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51       •   Multiple classes can use the same handle if used in different
52           request cylces.
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54       •   If multiple classes use the same database and these classes are
55           used in one request cycle then each class gets its own handle.
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USAGE

58       Normally your classes are designed to work not only with
59       Apache::DBI::Cache.  Hence, your classes don't know also about
60       Apache::DBI::Cache::ImaDBI. But your classes inherit from Class::DBI
61       and Class::DBI inherits from Ima::DBI.
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63       To get our special method called Apache::DBI::Cache::ImaDBI is used in
64       one of these ways:
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66        use Apache::DBI::Cache::ImaDBI patch=>1;
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68         or
69
70        use Apache::DBI::Cache::ImaDBI patch=>'Ima::DBI';
71
72         or
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74        use Apache::DBI::Cache::ImaDBI patch=>'Class::DBI';
75
76         or
77
78        use Apache::DBI::Cache::ImaDBI patch=>qw[My::Class1 My::Class2];
79
80       The first 2 usages are exactly the same. Our special method is inserted
81       directly into Ima::DBI. Thus, all classes based on Ima::DBI inherit it.
82
83       The 3rd usage inserts our method into Class::DBI. Thus, all classes
84       based on it inherit our method but classes that are base directly on
85       Ima::DBI do not.
86
87       In the 4th case our method is inserted into individual classes only.
88
89       Another way to use Apache::DBI::Cache::ImaDBI is by inheriting from it:
90
91        package My::Class;
92        use base qw/Apache::DBI::Cache::ImaDBI Class::DBI/;
93
94         or
95
96        package My::Class;
97        use base qw/Apache::DBI::Cache::ImaDBI Ima::DBI/;
98
99       Here it is necessary that Apache::DBI::Cache::ImaDBI cames before
100       Class::DBI or Ima::DBI.
101
102       I think that is not the preferred way because it requires source code
103       modification of your classes.
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SEE ALSO

106       Apache::DBI::Cache
107       Class::DBI
108       Ima::DBI
109

AUTHOR

111       Torsten Foertsch, <torsten.foertsch@gmx.net>
112

114       Copyright (C) 2006 by Torsten Foertsch
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116       This library is free software; you can redistribute it and/or modify it
117       under the same terms as Perl itself.
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121perl v5.34.0                      2021-07-22     Apache::DBI::Cache::ImaDBI(3)
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