Implement Salesforce Custom Notification Actions using Apex code Rest API Included Test Class

‪Code Way You to start with creating a Salesforce custom notification, enable Lightning Experience & Mobile App notifications!!‬

Custom Notification is very important to send alerts on desktop and/or mobile & keep your users in the know when important. Sometimes it is necessary to use custom Apex code instead using Process Builder or Flow. 

Here I tried to write code with schedular to run autonomously as cron job by Apex Schedular Class.

This Example will show how to trigger Alert to an Opportunity owner in day to Opportunity  Closing date , or this class can be reused for any objects with custom message with minimum required re coding. I have in Included Test Class too .

Before you send a custom notification, you must first create a notification type: 

How to create a Notification Type :

To send custom notifications via a process in Process Builder, a Flow in Flow Builder, or invocable action API you must Create notification types.

1. Enter Notification Builder in the Quick Find box in Setup, then select Custom Notifications.
2. Click New and add your Custom Notification Name and API Name, and supported channels.
3. Save your notification type.
4. If you enable the mobile channel, you must enable the supported apps for your notification type.
   1. From Setup, enter Notification Builder in the Quick Find box, then select Notification Delivery Settings.
   2. Choose your custom notification type, and select Edit from the dropdown menu.
   3. Select the supported applications for your notification type and save.

Supported REST HTTP Methods

* This object is available in API version 46.0 and later.

URI

/vXX.X/actions/standard/customNotificationAction

Formats

JSON, XML

HTTP Methods

GET, HEAD, POST

Authentication

Authorization: Bearer token

Inputs

Input	Details
customNotifTypeId	The ID of the Custom Notification Type being used for the notification.
recipientIds	The ID of the recipient or recipient type of the notification. UserId — The notification will be sent to this user, if this user is active. Values can be combined in a list up to the maximum of 500 values.
senderId	The User ID of the sender of the notification.
title	The title of the notification, as it will be seen by recipients. Maximum characters: 250.
body	body of the notification, as it will be seen by recipients. Maximum characters: 750.
targetId	The Record ID for the target record of the notification.

Sample Output:

 

Class CustNotify will get Notification Type Id, Generate JSON and call REST API to Trigger Bulk/single Notification for Object Owner !!

String NotifTypeID = [SELECT Id FROM CustomNotificationType WHERE DeveloperName = :NotifiDeveloperName].Id;

above SOQL will get Notification Type Id by passing Notification Developer Name.

Here is the Code Example :

  and this Schedule Class is to Execute CustNotify ! 

And my use case was to execute Every Midnight    to schedule to Notify Opportunity Owners .

System.schedule('Scheduled CustNotify', '0 0 0 * * ?', new CustNotifyScheduledCron ());

 

Here is the Test Class

 

Ref: 

https://developer.salesforce.com/docs/atlas.en-us.api_action.meta/api_action/actions_obj_custom_notification.htm

https://help.salesforce.com/articleView?id=notif_builder_custom_type.htm&type=5