Contents
How do I subscribe to a platform event in Salesforce?
Subscribe to Platform Event Notifications with Apex Triggers
- Click the Setup icon, select Developer Console, and click File | New | Apex Trigger.
- Provide a name and choose your event for the sObject, and click Submit.
How do I subscribe to platform events in LWC?
Firstly we need to import empApi component to use Platform Event in Lightning Web Components (LWC). Then we need to pass channel name. We can use the same component to use the Push topic channel name. Finally, once the component loads we call the handleSubscribe() method to subscribe the channel.
What is lightning message service?
Introduced in the Winter ’20 release by Salesforce, Lightning Message Service is the out-of-the-box functionality that empowers you to communicate between Visualforce and Lightning Components, including Aura web components (AWC) and Lightning web components (LWC).
What is LWC event?
LWC uses standard DOM events to create and dispatch events. The DOM events system is a programming design pattern that includes these elements. For example – if you change the dispatch statement to this. dispatchEvent(new CustomEvent(“uploadEvent”)); code won’t work because the event name contain upper case letter.
How to subscribe to platform events in Lightning?
Subscribe to platform events with the empApi component in your Lightning web component or Aura component. The empApi component provides access to methods for subscribing to a streaming channel and listening to event messages.
How does the empapi component work in Lightning?
The empApi component provides access to methods for subscribing to a streaming channel and listening to event messages. The empApi component uses a shared CometD-based Streaming API connection, enabling you to run multiple streaming apps in the browser for one user.
What kind of components are used in Lightning?
The connection is not shared across user sessions. As of Spring ’19 (API version 45.0), you can build Lightning components using two programming models: the Lightning Web Components model, and the original Aura Components model. Lightning web components are custom HTML elements built using HTML and modern JavaScript.