Plack::Loader::Delayed - Delay the loading of .psgi until the first run
plackup -s Starlet -L Delayed myapp.psgi
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.
You can combine this loader with -M command line option, like:
-M
plackup -s Starlet -MCatalyst -L Delayed myapp.psgi
loads the module Catalyst in the master process for the better process management with copy-on-write, however the application myapp.psgi is loaded per children.
myapp.psgi
Starman since version 0.2000 loads this loader by default unless you specify the command line option --preload-app for the starman executable.
--preload-app
Web server developers can make use of psgi_app_builder attribute callback set in Plack::Handler, to load the application earlier than the first request time.
psgi_app_builder
Tatsuhiko Miyagawa
plackup
To install Plack, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Plack
CPAN shell
perl -MCPAN -e shell install Plack
For more information on module installation, please visit the detailed CPAN module installation guide.