Report Handled Exceptions To New Relic

app/code/Magento/NewRelicReporting/Model/NewRelicWrapper.php

@@ -28,6 +28,19 @@ public function addCustomParameter($param, $value)
         return false;
     }
 
+    /**
+     * Wrapper for 'newrelic_notice_error' function
+     *
+     * @param  Exception $exception
+     * @return void
+     */
+    public function reportError($exception)
+    {
+        if (extension_loaded('newrelic')) {
+            newrelic_notice_error($exception->getMessage(), $exception);
+        }
+    }
+
     /**
      * Checks whether newrelic-php5 agent is installed
      *

app/code/Magento/NewRelicReporting/Plugin/HttpPlugin.php

@@ -0,0 +1,53 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\NewRelicReporting\Plugin;
+
+use Magento\Framework\App\Bootstrap;
+use Magento\Framework\App\Http;
+use Magento\NewRelicReporting\Model\Config;
+use Magento\NewRelicReporting\Model\NewRelicWrapper;
+
+class HttpPlugin
+{
+    /**
+     * @var Config
+     */
+    private $config;
+
+    /**
+     * @var NewRelicWrapper
+     */
+    private $newRelicWrapper;
+
+    /**
+     * @param Config $config
+     * @param NewRelicWrapper $newRelicWrapper
+     */
+    public function __construct(
+        Config $config,
+        NewRelicWrapper $newRelicWrapper
+    ) {
+        $this->config = $config;
+        $this->newRelicWrapper = $newRelicWrapper;
+    }
+
+    /**
+     * Report exception to New Relic
+     *
+     * @param Http $subject
+     * @param Bootstrap $bootstrap
+     * @param \Exception $exception
+     * @return void
+     *
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     */
+    public function beforeCatchException(Http $subject, Bootstrap $bootstrap, \Exception $exception)
+    {
+        if ($this->config->isNewRelicEnabled()) {
+            $this->newRelicWrapper->reportError($exception);
+        }
+    }
+}

app/code/Magento/NewRelicReporting/etc/di.xml

@@ -27,4 +27,7 @@
             </argument>
         </arguments>
     </type>
+    <type name="Magento\Framework\App\Http">
+        <plugin name="framework-http-newrelic" type="Magento\NewRelicReporting\Plugin\HttpPlugin"/>
+    </type>
 </config>