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In Magento 1 I can get list of events/observers by debugging dispatchEvent() method from Mage.php like below.

/** * Dispatch event * * Calls all observer callbacks registered for this event * and multiple observers matching event name pattern * * @param string $name * @param array $data * @return Mage_Core_Model_App */ public static function dispatchEvent($name, array $data = array()) { Mage::log($name,null,'Events'); Varien_Profiler::start('DISPATCH EVENT:'.$name); $result = self::app()->dispatchEvent($name, $data); Varien_Profiler::stop('DISPATCH EVENT:'.$name); return $result; }

In magento 2 where I can get list of events/observers?

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3 Answers 3

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You can do the same thing you did in Magento 1.x in the method \Magento\Framework\Event\Manager::dispatch().

but it's a difference. You don't have access to the logger.
You will have to inject an instance of the logger in the constructor.

protected $logger; public function __construct( InvokerInterface $invoker, ConfigInterface $eventConfig, \Psr\Log\LoggerInterface $logger ) { $this->_invoker = $invoker; $this->_eventConfig = $eventConfig; $this->logger = $logger; }

Then you can call in the dispatch method this:

$this->logger->info($message);

Instead of info you can use all the methods from \Psr\Log\LoggerInterface

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  • You are rocking........ Commented Oct 15, 2015 at 5:56
  • @Marius just a typo with keyword $protected instead of protected $logger. Commented Apr 13, 2016 at 6:33
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Since this is for "quick debugging", you could avoid multiple edits by doing.

public function dispatch($eventName, array $data = []) { $logger = \Magento\Framework\App\ObjectManager::getInstance()->get(\Psr\Log\LoggerInterface::class); $logger->info($eventName); ...

Location

/lib/internal/Magento/Framework/Event/Manager.php

@Marius answer is the correct solution.

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4
  • Use \Psr\Log\LoggerInterface::class please. Always. Commented Nov 19, 2015 at 17:17
  • @nevvermind .. I tried that before ... Fatal error: Non-static method Psr\Log\LoggerInterface::info() cannot be called statically. Please let me know if you figure out an easier way. Commented Nov 19, 2015 at 17:26
  • I'm talking about the ::class keyword instead of the literal string FQCN. Commented Nov 19, 2015 at 17:43
  • Just get the idea here, instead of modifying the core. In other words, create a before/after Plugin for the above method, inject your Logger, and be happy. :) Commented Dec 14, 2020 at 7:43
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In my case I can get list of all event by doing below changes which is very short cut like we do in mage.php file of magento1:

Note: I have only tested on magento2.1.1 version so I am not sure for any other version

\vendor\magento\framework\Event\Manager.php public function dispatch

write below code to get all event in debug.log file after 

$eventName = mb_strtolower($eventName);

near to line 56

\Magento\Framework\App\ObjectManager::getInstance()->get('Psr\Log\LoggerInterface')->debug($eventName);
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