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.IX Title "Plack::Loader::Delayed 3pm"
.TH Plack::Loader::Delayed 3pm 2024-01-20 "perl v5.38.2" "User Contributed Perl Documentation"
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.SH NAME
Plack::Loader::Delayed \- Delay the loading of .psgi until the first run
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 1
\&  plackup \-s Starlet \-L Delayed myapp.psgi
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
This loader delays the compilation of specified PSGI application until
the first request time. This prevents bad things from happening with
preforking web servers like Starlet, when your application
manipulates resources such as sockets or database connections in the
master startup process and then shared by children.
.PP
You can combine this loader with \f(CW\*(C`\-M\*(C'\fR command line option, like:
.PP
.Vb 1
\&  plackup \-s Starlet \-MCatalyst \-L Delayed myapp.psgi
.Ve
.PP
loads the module Catalyst in the master process for the better process
management with copy-on-write, however the application \f(CW\*(C`myapp.psgi\*(C'\fR
is loaded per children.
.PP
Starman since version 0.2000 loads this loader by default unless
you specify the command line option \f(CW\*(C`\-\-preload\-app\*(C'\fR for the
starman executable.
.SH DEVELOPERS
.IX Header "DEVELOPERS"
Web server developers can make use of \f(CW\*(C`psgi_app_builder\*(C'\fR attribute
callback set in Plack::Handler, to load the application earlier than
the first request time.
.SH AUTHOR
.IX Header "AUTHOR"
Tatsuhiko Miyagawa
.SH "SEE ALSO"
.IX Header "SEE ALSO"
plackup