Recording of Session: http://salesforce.vidyard.com/watch/gz2QhCfxJ9-3kXx6QOGsrA Getting the most out of any new technology requires in depth knowledge of how key components behave and how to use them. Join us for an in-depth examination of the Lightning Components transport layer: the Action Service.

1. All Aboard
The Lightning Components Action Service
​ Peter Chittum
​ Developer Evangelist
​ @pchittum
​ github.com/pchittum
​

2. Safe Harbor
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or if any of the assumptions proves incorrect, the results of salesforce.com, inc. could differ materially from the results expressed or implied by
the forward-looking statements we make. All statements other than statements of historical fact could be deemed forward-looking, including any
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The risks and uncertainties referred to above include – but are not limited to – risks associated with developing and delivering new functionality
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may not be delivered on time or at all. Customers who purchase our services should make the purchase decisions based upon features that are
currently available. Salesforce.com, inc. assumes no obligation and does not intend to update these forward-looking statements.

3. Peter Chittum
Developer Evangelist
@pchittum
github.com/pchittum
Speaker

4. Agenda
▪ Brief Overview of Components
▪ Action Service Basics
▪ Beyond the Basics
▪ A Miscellany of Things

5. App Cloud and Lightning
Connect Process
Builder
App
Builder
Component
Framework

6. Introducing Lightning Components
​ Reusable UI components for any device
Connect
Process
Builder
App
Builder
Component
Framework

7. Component Artifacts
Design Principles
• Structured Bundle of
Resources
• Client-side Rendered
• Extensible, Reusable, Atomic,
Event-Driven
• Apex as backend
• First Class UI Citizen
APP or COMPONENT BUNDLE
Definition: markup
Style: css
Helper : js
Documentation
Controller: js
Renderer: js
Design Markup Icon: SVG

8. Component Client Side Rendering
JSON
component:{...}
<div>...</div>

9. Component State
Attribute

10. Component-to-Component Communication
Event

11. Component-to-Server Communication
Action

12. Agenda
▪ Brief Overview of Components
▪ Action Service Basics
▪ Beyond the Basics
▪ A Miscellany of Things

13. Actions: Interact with the Server
• Apex Method Surfaced to Lightning Components
• @AuraEnabled annotation

14. Many Components Many Server Trips
XMLHttpRequest
XMLHttpRequest
XMLHttpRequest

15. Many Components Many Actions: Boxcarring
ActionService

16. Demo

17. Agenda
▪ Brief Overview of Components
▪ Action Service Basics
▪ Beyond the Basics
▪ A Miscellany of Things

18. Defer High Volume Actions
ActionService
• Defer High-Volume Actions
• Action.setCaboose()

19. Insert tracking
record
Caboose action
measures on
setInterval
Device
Orientation
Stop tracking
Update record
Clear handlers
Component
render
wobble__c measurement__c
Demo

20. Parent Child Display Optimization
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21. Actions: Chained
callback
enqueueAction(child)

22. Demo

23. Agenda
▪ Brief Overview of Components
▪ Action Service Basics
▪ Beyond the Basics
▪ A Miscellany of Things

24. Useful Tools and Lessons
• Javascript
• Callbacks and isValid
• Closures
• Unsupported Events
• Only on init
• Component Lifecycle

25. Learn Javascript
James Governor, RedMonk

26. Javascript is Async
​ console.log('this will go first’);
​ setTimeout(function(){'this happens third'},1);
​ console.log('this happens second');
​ // output:
​ 'this will go first'
​ 'this happens second'
​ 'this happens third'
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27. Check Component Validity: isValid()
​ myhandler : function(component, event, helper){
​ ...
​ var action = component.get('c.myApexMethod');
​ ...
​ action.setCallback(this, function(serverResponse){
​ ...
​ component.set('v.myAttrib',serverResponse.getReturnValue());
​ });
​ $A.enqueueAction(action);
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​ action.setCallback(this, (function(serverResponse){
​ ...
if (component.isValid()) {
​ component.set('v.myAttrib',serverResponse.getReturnValue());
​ } else {
​ ...exit gracefully
​ }
​ });
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28. Closures for Reusability
​ //in MyComponentHelper.js
​ callbackFactory : function(component){
​ return function (serverResponse){
​ component.set('v.myAttribute', serverResponse.getReturnValue());
​
​ }
​ }
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​ doInit: function(component, event, helper){
​ component.myCallbackFunction = helper.callbackFactory(component);
​ });
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​ //while setting up action do this...
​ action.setCallback(this, helper.myCallbackFunction);
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29. Clean Up After Yourself in Unrender
​ unrender: function(component, helper){
​
​ window.removeEventListener('deviceorientation',component.doOrientation);
​ }
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30. Go Play and Break Things
​ That what your Developer Edition org is for!
• Action Service is how your Lightning Component talks to the App Cloud
• Learn it!
• It is still new, so learn the effects of working with it
• http://salesforce.stackexchange.com

31. Q & A
Peter Chittum
Developer Evangelist
@pchittum
github.com/pchittum
​ A list of resources will be posted to the session Chatter feed.

32. Thank you