Data::Fetch - give advance warning that you'll be needing a value
Version 0.06
Sometimes we know in advance that we'll be needing a value which is going to take a long time to compute or determine. This module fetches the value in the background so that you don't need to wait so long when you need the value.
use CalculatePi; use Data::Fetch; my $fetcher = Data::Fetch->new(); my $pi = CalculatePi->new(places => 1000000); $fetcher->prime(object => $pi, message => 'as_string'); # Warn we'll run $pi->as_string() in the future # Do other things print $fetcher->get(object => $pi, message => 'as_string'), "\n"; # Runs $pi->as_string()
Creates a Data::Fetch object. Takes no argument.
Say what is is you'll be needing later. Call in an array context if get() is to be used in an array context.
Takes two mandatory parameters:
object - the object you'll be sending the message to message - the message you'll be sending
Takes one optional parameter:
arg - passes this argument to the message
Retrieve get a value you've primed. Call in an array context only works if prime() was called in an array context, or the value wasn't primed
If you don't prime it will still work and store the value for subsequent calls, but in this scenerio you gain nothing over using CHI to cache your values.
Nigel Horne, <njh at bandsman.co.uk>
<njh at bandsman.co.uk>
Can't pass more than one argument to the message.
I would not advise using this to call messages that change values in the object.
Changing a value between prime and get will not necessarily get you the data you want. That's the way it works and isn't going to change.
If you change a value between two calls of get(), the earlier value is always used. This is definitely a feature not a bug.
Please report any bugs or feature requests to bug-data-fetch at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Data-Fetch. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.
bug-data-fetch at rt.cpan.org
You can find documentation for this module with the perldoc command.
perldoc Data::Fetch
You can also look for information at:
MetaCPAN
https://metacpan.org/release/Data-Fetch
RT: CPAN's request tracker
https://rt.cpan.org/NoAuth/Bugs.html?Dist=Data-Fetch
CPANTS
http://cpants.cpanauthors.org/dist/Data-Fetch
CPAN Testers' Matrix
http://matrix.cpantesters.org/?dist=Data-Fetch
CPAN Ratings
http://cpanratings.perl.org/d/Data-Fetch
CPAN Testers Dependencies
http://deps.cpantesters.org/?module=Data::Fetch
Copyright 2010-2020 Nigel Horne.
This program is released under the following licence: GPL2
To install Data::Fetch, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Data::Fetch
CPAN shell
perl -MCPAN -e shell install Data::Fetch
For more information on module installation, please visit the detailed CPAN module installation guide.