Streaming API Developer Guide

Getting Started with Streaming API
Code Examples
Example: Subscribe to and Replay Events Using a Java Client (EMP Connector)
Example: Subscribe to and Replay Events Using a Lightning Component
Example: Subscribe to and Replay Events Using a Visualforce Page
Prerequisites
Deploy a Sample Project to Your Org
Assign a Permission Set
Durable PushTopic Streaming Sample
Durable Generic Streaming Sample
Replay Events Sample: Code Walkthrough
Example: Interactive Visualforce Page without Replay
Example: Authentication
Client Connection Considerations
PushTopic Events
Generic Events
Monitoring Event Usage
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Example: Subscribe to and Replay Events Using a Visualforce Page

The Visualforce sample app shows you how to subscribe to durable streaming events for PushTopic and generic events. The app contains two interactive Visualforce pages: one for PushTopic events and one for generic events. You can generate test events and view them on each page. You specify which events are retrieved and displayed by setting replay options.

For each Visualforce page, the logic for replaying events is contained within a Visualforce component. The component registers the Salesforce-provided CometD extension and sets replay options.