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How can I apply one Plack application to another?

I have it:

use Plack::Builder;
my $config_app = sub {...};
my $app = sub {...}

builder {
    mount "/admin" => $config_app;
    mount "/"   => $app;
};

$config_appsaving configuration values ​​to a file app.cfg, and $appits configuration file. Reading the configuration file in each request is not required. You must read it at the beginning of the application and re-read it when it changes.

What is the best way to achieve this?

My only idea: the application will remember the last config_read_time file and in each request will check the modification time app.cfg. If the file has been modified, reread it.

Is this the best solution? (mean some messages between $ config_app and $ app, for example, when $ config_app saved the new configuration will send some message to $app: re-read the config.

+3
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2 answers

.

:

use constant MIN_CHECK_DELAY => 5;  #SECONDS
use constant CONFIG_FILE => '/etc/wtf.conf';

{
    my $last_changed = 0;
    my $last_check   = 0;

    sub load_config {

        return if $last_check + MIN_CHECK_DELAY <= time;

        return if (stat(CONFIG_FILE))[9] <= $last_check;

        # Do stuff here.

        return;
    }

}

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+5

$app ( ) $config_app, .

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+6

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