[dancer-users] Problems writing a Plugin

[Clive Eisen]

I do a very similar thing for a custom redis plugin I wrote

You have to declare the object outside the BUILD and set it inside

eg
package Dredis;
use Redis::Fast;
use Dancer2::Plugin;

my $redii;

sub BUILD {
        my ($plugin) = @_;
	<snip lots of setup stuff>
	$redii->{$r}{$i} = Redis::Fast->new( %opts );
}

Then use $redi-> in the get/set methods
eg
sub dredis {
        my( $called, $plugin, $method, @args ) = @_;
        
        return $redii->{$called}->$method(@args);
}
1;

--
Clive Eisen
GPG: 75056DD0






> On 13 Oct 2017, at 14:29, Alfonso Pinto <alfonso.pinto at gmail.com> wrote:
> 
> Dear all,
> 
> I'm trying to write a Dancer2::Plugin to maintain ZMQ socket and send some information to a backend when a request is received.
> 
> This is the plugin :
> package Dancer2::Plugin::ZMQ;
> 
> 
> 
> use Dancer2::Plugin;
> 
> 
> 
> use ZMQ::FFI;
> 
> use ZMQ::FFI::Constants qw(ZMQ_REQ);
> 
> 
> 
> has host => (is => 'ro');
> 
> has identity => (is => 'ro');
> 
> 
> 
> has _context => (is => 'ro', lazy_build => 1);
> 
> sub _build_context {
> 
>     my $plugin = shift;
> 
>     return ZMQ::FFI->new();
> 
> }
> 
> 
> 
> has client => (is => 'ro', lazy_build => 1, plugin_keyword => 'zmq');
> 
> sub _build_client {
> 
>     my $plugin = shift;
> 
> 
> 
>     my $client = $plugin->_context->socket(ZMQ_REQ);
> 
>     $client->set_identity = $plugin->config->{identity} . "-$$";
> 
>     $client->connect($plugin->config->{host});
> 
>     return $client;
> 
> }
> 
> 
> 
> 1;
> 
>  
>  This is my config.yml:
> 
> plugins:
>     ZMQ:
>         identity: "api-gw"
>         host: "tcp://proxy:6660"
> 
> 
> And this is how I use it in one route:
> 
> post '/' => sub {
>     my $message = body_parameters->get('message');
>     zmq->send(message =>$message);
>     my $reply = zmq->recv();
>     return {"reply" => $reply};
> };
>  
> 
> The issue is that I get this error:
> Router exception: Can't call method "send" on an undefined 
>  
> I don't understand why it's not keeping the client instantiated. What is wrong withmy approach? What I don't want is to create a socket for each request received.
> 
> And before someone asks, the backend is working and replying. A simple script like this one works in my setup:
> 
> use v5.10;
> use ZMQ::FFI qw(ZMQ_REQ);
>  
> my $endpoint = "tcp://proxy:6660";
> my $ctx      = ZMQ::FFI->new();
>  
> my $s1 = $ctx->socket(ZMQ_REQ);
> $s1->connect($endpoint);
>  
> $s1->send('ohhai');
> print $s1->recv();
> 
> Thanks in advance.
> Regards,
> Alfonso 
> _______________________________________________
> dancer-users mailing list
> dancer-users at dancer.pm
> http://lists.preshweb.co.uk/mailman/listinfo/dancer-users

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