Streaming API Developer Guide

Getting Started with 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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Example: Subscribe to and Replay Events Using a Java Client

This code example implements Streaming API from a Java client using a library called Enterprise Messaging Platform (EMP) Connector. EMP connector is a thin wrapper around the CometD library. It hides the complexity of creating a CometD client and subscribing to Streaming API in Java. The example subscribes to a channel, receives notifications, and supports replaying events with durable streaming.

EMP Connector is a free, open-source, community-supported tool. Salesforce provides this tool as an example of how to subscribe to events using CometD. To contribute to the EMP Connector project with your own enhancements, submit pull requests to the repository at https://github.com/forcedotcom/EMP-Connector.

Important

EMP Connector is based on Java 8 and uses CometD version 3.1.0. The connector supports PushTopic and generic streaming. It also supports username and password authentication and OAuth bearer token authentication.

The example requires API version 37.0 or later. For a code example that supports earlier API versions, refer to an earlier version of this documentation.

Note