{"id":39096,"date":"2016-01-06T17:52:27","date_gmt":"2016-01-06T17:52:27","guid":{"rendered":"http:\/\/webkul.com\/blog\/?p=39096"},"modified":"2024-03-04T09:35:10","modified_gmt":"2024-03-04T09:35:10","slug":"how-to-create-custom-observers-in-magento2","status":"publish","type":"post","link":"https:\/\/webkul.com\/blog\/how-to-create-custom-observers-in-magento2\/","title":{"rendered":"How to create custom observers in magento2"},"content":{"rendered":"\n

How to create custom observers in magento2. :<\/p>\n\n\n\n

In this example we will should you How to create a event in Magento 2.<\/p>\n\n\n\n

This can be done by using event dispatcher and event observers .<\/p>\n\n\n\n

In this blog We are going to explain you about what are event dispatchers and event observers.<\/p>\n\n\n\n

Now we want to dispatch an event which allow other module can change the word displayed. We will change the controller like this:<\/p>\n\n\n\n

For this firstly we declare a event whenever we want like I am going to declare this observer in controller execute method-<\/p>\n\n\n\n

Step 1- Declaration of event in Controller<\/strong><\/p>\n\n\n\n

public function execute()\n    {\n        try{\n            if($this->getRequest()->isPost()){\n                if (!$this->_formKeyValidator->validate($this->getRequest())) {\n                    return $this->resultRedirectFactory->create()->setPath('*\/*\/');\n                }\n                ..\n\n                \/* Here want to create to execute some code whenever this controller will be executed - So we create custom event here *\/\n\n                $this->_eventManager->dispatch(\n                    'custom_observer_name',\n                    [$this->getRequest()->getParams()]\n                );\n\n                ..\n            }            \n        }catch (\\Magento\\Framework\\Exception\\LocalizedException $e) {\n            $this->messageManager->addError($e->getMessage());\n            return $this->resultRedirectFactory->create()->setPath('*\/*\/');\n        }  catch (Exception $e) {\n            $this->messageManager->addError($e->getMessage());\n            return $this->resultRedirectFactory->create()->setPath('*\/*\/');\n        }\n    }<\/pre>\n\n\n\n
Here, we have dispatched an event named “custom_observer_name”.<\/p>\n\n\n\n
NOTE<\/strong><\/h4>\n\n\n\n
The dispatch method will receive 2 arguments: an unique event name and an array data.<\/p>\n\n\n\n
For this we need to create a file events.xml at app \/ code \/ {vendor name} \/ {module name} \/ etc \/ and declare out custom observer as shown in the code below :<\/p>\n\n\n\n
Step 2- Declare the custom observer<\/strong><\/p>\n\n\n\n
<?xml version="1.0"?>\n<config xmlns:xsi="http:\/\/www.w3.org\/2001\/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event\/etc\/events.xsd">\n    <event name="custom_observer_name">\n        <observer name="custom_observer_method" instance="Webkul\\Grid\\Observer\\CustomObserverMethod"\/>\n    <\/event>\n<\/config><\/pre>\n\n\n\n
In this file, under config element, we define an event element with the name is the event name which was dispatch above.<\/p>\n\n\n\n
The class which will execute this event will be define in the observer element by instance attribute.<\/p>\n\n\n\n
Step 3- creating custom observer method : <\/strong><\/p>\n\n\n\n
Now, we will create a custom observer file named “CustomObserverMethod.php” at app \/ code \/ {vendorname} \/ {modulename} \/ Observer \/<\/p>\n\n\n\n
namespace Webkul\\Grid\\Observer;\n\nuse Magento\\Framework\\Event\\ObserverInterface;\n\nclass CustomObserverMethod implements ObserverInterface\n{\n    \/**\n     * custom event handler\n     *\n     * @param \\Magento\\Framework\\Event\\Observer $observer\n     * @return void\n     *\/\n    public function execute(\\Magento\\Framework\\Event\\Observer $observer)\n    {\n        try{\n            $eventData = $observer->getData();\n            \/\/ Write your code here\n        }catch(Exception $e){\n            $this->messageManager->addError($e->getMessage());\n        }\n    }\n}<\/pre>\n\n\n\n
NOTE<\/strong>:<\/p>\n\n\n\n
The excute method of this file will get called when the dispatcher event is called which we have prepared above in the first file.<\/p>\n\n\n\n
Now use the data to perform any custom operation which is required and after that the code after the dispatch event will get executed .<\/p>\n\n\n\n
So in this way you can create and call your own custom event easily.<\/p>\n\n\n\n
You can also check the below links  :<\/p>\n\n\n\n
https:\/\/developer.adobe.com\/commerce\/php\/development\/components\/events-and-observers\/<\/a><\/p>\n\n\n\n
https:\/\/webkul.com\/blog\/magento2-use-plugins\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
How to create custom observers in magento2. : In this example we will should you How to create a event in Magento 2. This can be done by using event dispatcher and event observers . In this blog We are going to explain you about what are event dispatchers and event observers. Now we want […]<\/a><\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[302],"tags":[2070,2573,388],"class_list":["post-39096","post","type-post","status-publish","format-standard","hentry","category-magento2","tag-magento2","tag-magento2-event","tag-observer"],"yoast_head":"\nHow to create custom observers in magento2 - Webkul Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/webkul.com\/blog\/how-to-create-custom-observers-in-magento2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to create custom observers in magento2 - Webkul Blog\" \/>\n<meta property=\"og:description\" content=\"How to create custom observers in magento2. : In this example we will should you How to create a event in Magento 2. This can be done by using event dispatcher and event observers . In this blog We are going to explain you about what are event dispatchers and event observers. Now we want [...]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/webkul.com\/blog\/how-to-create-custom-observers-in-magento2\/\" \/>\n<meta property=\"og:site_name\" content=\"Webkul Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/webkul\/\" \/>\n<meta property=\"article:published_time\" content=\"2016-01-06T17:52:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-04T09:35:10+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2021\/08\/webkul-og.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Pooja Sahu\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@webkul\" \/>\n<meta name=\"twitter:site\" content=\"@webkul\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Pooja Sahu\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/webkul.com\/blog\/how-to-create-custom-observers-in-magento2\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/webkul.com\/blog\/how-to-create-custom-observers-in-magento2\/\"},\"author\":{\"name\":\"Pooja Sahu\",\"@id\":\"https:\/\/webkul.com\/blog\/#\/schema\/person\/420601cccfd5bc83506bcdd12362504b\"},\"headline\":\"How to create custom observers in magento2\",\"datePublished\":\"2016-01-06T17:52:27+00:00\",\"dateModified\":\"2024-03-04T09:35:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/webkul.com\/blog\/how-to-create-custom-observers-in-magento2\/\"},\"wordCount\":319,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/webkul.com\/blog\/#organization\"},\"keywords\":[\"Magento2\",\"magento2 event\",\"OBSERVER\"],\"articleSection\":[\"Magento2\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/webkul.com\/blog\/how-to-create-custom-observers-in-magento2\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/webkul.com\/blog\/how-to-create-custom-observers-in-magento2\/\",\"url\":\"https:\/\/webkul.com\/blog\/how-to-create-custom-observers-in-magento2\/\",\"name\":\"How to create custom observers in magento2 - 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