Force.com Streaming API Developer Guide

Getting Started with Force.com Streaming API
Code Examples
Example: Subscribe to and Replay Events Using a Visualforce Page
Example: Interactive Visualforce Page without Replay
Example: Subscribe to and Replay Events Using a Java Client
Prerequisites
Step 1: Create an Object
Step 2: Create a PushTopic
Step 3: Download and Build the Project
Step 4: Use the Connector with Username and Password Login
Step 5: Use the Connector with OAuth Bearer Token Login
Learn More About EMP Connector
Example: Authentication
Using Streaming API
Generic Streaming
Reference
PDF

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Learn More About EMP Connector

Let’s take a closer look at the components of EMP Connector.

Authenticating

User credential information is passed in to the login function. The login function’s return value is passed in to the main connector class later.

For OAuth authentication, use the BayeuxParameters constructor to override the methods in the BayeuxParameters class and provide the token and URL values.

Listening to Events

To listen to events, the connector uses the Java event in a lambda expression. This statement prints the event message to the output for each received event notification. Place this statement before the statement that subscribes to the topic.

Subscribing to a Topic

The EmpConnector class is the main class that exposes the functionality of starting a connection and subscribing. The class contains functions to create a connection, subscribe to a topic, cancel a subscription, and stop a connection.

To end a subscription, call these functions.