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Is it possible to trigger a event for specific plugin?

I can load a specific plugin

$loaded = JPluginHelper::importPlugin('my_component', 'my_plugin_1');

But when I trigger an event, all the plugins that have that event are fired:

$results = JEventDispatcher::getInstance()->trigger('my_event');

I get the results not only of plugin1 but all the plugins that listen to that event.

$results = ['my_plugin_1_response', 'my_plugin_2_response'];

Is it possible to limit the plugins listening to the event to my_plugin_1_response only?

Please note that one possible solution would be to order the plugins and get the $results[0] as the result, but I'm not interested in this, I don't want that the other plugins are fired at all.

Thanks!

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Generally, an event dispatcher does not support this concept. You're better off directly calling that single function versus going through a dispatcher if you really only want one response from one location.

Joomla 4.0 will use the refactored Event package as its base for event management, and the EventInterface contains a stopPropagation() method which a listener (your plugins) can call which will instruct the event dispatcher to stop propagating the event to additional listeners. So you have that to look forward to.

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  • Thank you Michael for the info! The problem calling that function directly is that it won't be able to access params through $this->params, so I would need a workaround. Probably the best solution -in my case- will be to prefix the method so the plugins don't share the same event name. I will have to wait for Joomla 4 then! 😓
    – xavip
    Commented Jan 3, 2017 at 12:55
  • ``` $plugin = JPluginHelper::getPlugin($type, $pluginName); $params = new Registry($plugin->params); ``` As long as you aren't dynamically setting params in the plugin, that'll give you what's in the database.
    – Michael
    Commented Jan 3, 2017 at 21:31

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