1Apache::Reload(3)     User Contributed Perl Documentation    Apache::Reload(3)
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NAME

6       Apache::Reload - Reload changed modules
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SYNOPSIS

9       In httpd.conf:
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11         PerlInitHandler Apache::Reload
12         PerlSetVar ReloadAll Off
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14       Then your module:
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16         package My::Apache::Module;
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18         use Apache::Reload;
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20         sub handler { ... }
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22         1;
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DESCRIPTION

25       This module is two things. First it is an adaptation of Randal
26       Schwartz's Stonehenge::Reload module that attempts to be a little more
27       intuitive and makes the usage easier. Stonehenge::Reload was written by
28       Randal to make specific modules reload themselves when they changed.
29       Unlike Apache::StatINC, Stonehenge::Reload only checked the change time
30       of modules that registered themselves with Stonehenge::Reload, thus
31       reducing stat() calls. Apache::Reload also offers the exact same
32       functionality as Apache::StatINC, and is thus designed to be a drop-in
33       replacement. Apache::Reload only checks modules that register
34       themselves with Apache::Reload if you explicitly turn off the StatINC
35       emulation method (see below). Like Apache::StatINC, Apache::Reload must
36       be installed as an Init Handler.
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38   StatINC Replacement
39       To use as a StatINC replacement, simply add the following configuration
40       to your httpd.conf:
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42         PerlInitHandler Apache::Reload
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44   Register Modules Implicitly
45       To only reload modules that have registered with Apache::Reload, add
46       the following to the httpd.conf:
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48         PerlInitHandler Apache::Reload
49         PerlSetVar ReloadAll Off
50         # ReloadAll defaults to On
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52       Then any modules with the line:
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54         use Apache::Reload;
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56       Will be reloaded when they change.
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58   Register Modules Explicitly
59       You can also register modules explicitly in your httpd.conf file that
60       you want to be reloaded on change:
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62         PerlInitHandler Apache::Reload
63         PerlSetVar ReloadAll Off
64         PerlSetVar ReloadModules "My::Foo My::Bar Foo::Bar::Test"
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66       Note that these are split on whitespace, but the module list must be in
67       quotes, otherwise Apache tries to parse the parameter list.
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69   Un-Register Modules Explicitly
70       If ReloadAll is set to On, then you can explicity force a module not to
71       be reloaded with
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73         no Apache::Reload;
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75       A warning will appear in the error log that the file has changed, but
76       will not be reloaded
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78   Special "Touch" File
79       You can also set a file that you can touch() that causes the reloads to
80       be performed. If you set this, and don't touch() the file, the reloads
81       don't happen. This can be a great boon in a live environment:
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83         PerlSetVar ReloadTouchFile /tmp/reload_modules
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85       Now when you're happy with your changes, simply go to the command line
86       and type:
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88         touch /tmp/reload_modules
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90       And your modules will be magically reloaded on the next request. This
91       option works in both StatINC emulation mode and the registered modules
92       mode.
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PSUEDOHASHES

95       The short summary of this is: Don't use psuedohashes. Use an array with
96       constant indexes. Its faster in the general case, its more guaranteed,
97       and generally, it works.
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99       The long summary is that I've done some work to get this working with
100       modules that use psuedo hashes, but its still broken in the case of a
101       single module that contains multiple packages that all use
102       psuedohashes.
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104       So don't do that.
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AUTHOR

107       Matt Sergeant, matt@sergeant.org
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MAINTAINERS

110       the mod_perl developers, dev@perl.apache.org
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SEE ALSO

113       Apache::StatINC, Stonehenge::Reload
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117perl v5.32.1                      2021-01-26                 Apache::Reload(3)