Build Your First Real-time App with the Streaming API

Build your first Real-Time App with
Streaming API

Hal Hildebrand
Vinod Mehra
Jeff Lai

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Hal, Vinod, Jeff, Alex
Salesforce R&D

Before we begin

What you will need to follow along
 Have your DEV Org created and ready
 Install the Streaming Hands on Package
 See http://bit.ly/demo-setup for complete instructions
Note!
Chrome browser support has a bug when showing maps!
Please use FireFox for this demo

See demo installation instructions at: http://bit.ly/demo-setup

What are we going to build

Build two scenarios
 Use geo location coordinates to plot Opportunities Real Time
• Use browser based geo location to show where Opportunities taking place
• Plot location on map based on Streaming API events
 Enable Real Time updates for a Leaderboard
• Update page with sales results from different sales people
• Use CometD to listen to Streaming API and get events


Short Introduction to Streaming

•Clients concerned with changes in data
• Data creation
• Data update
•Common solution is to poll for changes
• Wastes resources on both client and server
•Streaming API pushes changes to clients
• Sets up continuous queries to monitor changes
• JSON events describing changes

Demo Object Model

Event Custom Object
 Central Mechanism for notifications
Use Apex triggers to create Events
 When monitored objects are
 Created
 Updated

Event Location
 Captures locations for events

Event Publishing Workflow

Define triggers on entities
 Invoice
• After update
• After create
 Ticket
• After create

EventPublisher creates Event

Streaming Subscription Flow

Event is published (created)
EventUpdates topic query matches
Javascript function notifyEvent() called
Browser posts location information
 Rest call to create and add the
EventLocation on the event
Javascript function postLocation() called

Add Apex triggers to desired entities

Tickets
Invoices
Opportunities

Streaming Push Topics

Create Push Topics to enable detection of events
 EventUpdates
• SELECT Id, Name, Type__c, Timestamp__c, SObjectName__c, SObjectId__c
FROM Event__c
 OpportunityWon
• Select Id, OwnerId, Amount, isWon, StageName from Opportunity


Launch Workbench

Start Workbench to create a topic
 https://workbench.developerforce.com/login.php


View/Create Push Topics


Getting GPS from Browser

Include Static Resources for CometD and get Coordinates

Plotting new deals on a map

Connect and subscribe to events to plot


Demo!
Use your tablet, phone or laptop browser to login to your DE org
Select the “Location Streaming” tab
Open another browser tab, login to DE org
Create a new ticket
Location is pushed to the first tab
Select “Events” tab
Select event to see map with monitoring browser locations
tagged

Leaderboard – Deals Page

Show deals the usual way
 WonDeal Page


Leaderboard – Deals Page

Streaming Enabled


Leaderboard – Deals Page with Streaming API

Add Streaming API
 CometD from Static Resources


Leaderboard – Deals Page with Streaming API

Add Streaming API
 Connect
 Subscribe
 Listen to Topics


Build Your First Real-time App with the Streaming API

Build Your First Real-time App with the Streaming API

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