Ttdfjt

I need to override Admin sales/order/index controller, but still getting 404. Below the Steps I take to override -

Created My Custom Module
app/code/A2bizz/Order/registration.php

<?php
MagentoFrameworkComponentComponentRegistrar::register(
 MagentoFrameworkComponentComponentRegistrar::MODULE,
 'A2bizz_Order',
 __DIR__
);

app/code/A2bizz/Order/etc/module.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
 <module name="A2bizz_Order" setup_version="2.0.0" schema_version="2.0.0">
 <sequence>
 <module name="Magento_Sales"/>
 <module name="Magento_Rule"/>
 <module name="Magento_Catalog"/>
 <module name="Magento_Customer"/>
 <module name="Magento_Payment"/>
 <module name="Magento_SalesSequence"/>
 </sequence>
 </module>
</config>

app/code/A2bizz/Order/Controller/Adminhtml/Order/Index.php

<?php

 namespace A2bizzOrderControllerAdminhtmlOrder;

 class Index extends MagentoSalesControllerAdminhtmlOrderIndex
 
 public function execute()
 
 $this->messageManager->addSuccess('Message from new admin controller.');
 // Do your stuff here
 return parent::execute();
 
 

app/code/A2bizz/Order/etc/adminhtml/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
 <preference for="MagentoSalesControllerAdminhtmlOrderIndex" 
 type="A2bizzOrderControllerAdminhtmlOrderIndex" />
</config>

if anyone can help me on what I am doing wrong.
Thanks

It is recommendable use the plugin instead of preference for this.

https://devdocs.magento.com/guides/v2.2/extension-dev-guide/plugins.html

You must do the next.

Vendor/Namespace/etc/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
<type name="MagentoSalesControllerAdminhtmlOrderIndex">
 <plugin name="vendor_namespace_plugin_list" type="VendorNamespacePluginControllerOrderIndexPlugin"/>
</type>

Vendor/Namespace/Plugin/ControllerOrderIndexPlugin.php

<?php

namespace VendorNamespacePlugin;

use MagentoFrameworkMessageManagerInterface;
use MagentoSalesControllerAdminhtmlOrderIndex;

/**
 * Class ControllerOrderIndexPlugin
 */
class ControllerOrderIndexPlugin


 /**
 * @var ManagerInterface
 */
 private $messageManager;

 /**
 * ControllerOrderIndexPlugin constructor.
 *
 * @param ManagerInterface $messageManager
 */
 public function __construct(ManagerInterface $messageManager)
 
 $this->messageManager = $messageManager;
 

 /**
 * @param Index $subject
 */
 public function beforeExecute(
 Index $subject
 ) 
 $this->messageManager->addSuccessMessage(__('Message from new admin controller.'));