RESTful APIs have simplified backend access providing clean URL-based resource representations using standard HTTP methods such as GET and POST. But growth in the number of these APIs can lead to inefficiencies: if an app needs to access many of these resources at once, performance can bog down and user experience can suffer, especially for mobile devices. 'Boxcarring' is the bundling together of multiple HTTP requests into a single request. For example, a client framework might abstract the transport layer and bundle multiple requests into a single call. On the server, a RESTful API must be surfaced to accept a POST to multiple resource representations in one request. This talk will demonstrate both client and server side examples of boxcar requests.

1. Boxcars and
Cabooses
When one more XHR is too much
Peter Chittum
Developer Evangelist
@pchittum
github.com/pchittum

2. Safe Harbor
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any of the assumptions proves incorrect, the results of salesforce.com, inc. could differ materially from the results expressed or implied by the forward-
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product or service availability, subscriber growth, earnings, revenues, or other financial items and any statements regarding strategies or plans of
management for future operations, statements of belief, any statements concerning new, planned, or upgraded services or technology developments
and customer contracts or use of our services.
The risks and uncertainties referred to above include – but are not limited to – risks associated with developing and delivering new functionality for our
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5. The Goal
​ Suggest design principles
​ Try Salesforce platform
​ Lots of Salesforce projects looking for developers

6. Salesforce Background

8. ​ Business and Enterprise Application Platform Company

9. Sales
Service
Marketing
CommunityApps
Analytics

10. Bulk
REST
Metadata
SOAP
Tooling
Streaming
INTEGRATIONLAYER
Point & Click
Integration
Tools
Page
Builder
DECLARATIVE DEVELOPMENT
GLOBAL ENTERPRISE CLOUD INFRASTRUCTURE
PLATFORM SERVICES
APP MANAGEMENT & DEPLOYMENT
Workflow
Engine
UI
Framework
Sharing &
Permissions
Global
Search
Reports &
Dashboards
Files
& Content
Authenticatio
n
CollaborationEvent Log
Framework
Translation
Workbench
App
Builder
Process
Builder
Schema
Builder
Multi-Tenant Network
& Firewall
Auto
Updates
Backup &
Geodiversity
Security Trust
IDECLI Agile
Accelerator
Store
Builder
Dev
Console
Sandbox
Metadata
Heroku DX node.js
PROGRAMMATIC DEVELOPMENT
Database Smart
Containers
Heroku
Add-ons
Heroku
Button
Ruby
Identity
Global
Data Centers
Data
Storage
Single code
base
Python Java APEXPHP
Offline
Salesforce1 Mobile
Container
Geolocation
Push
Notifications
SDK Mobile Identity
MOBILE SERVICES
Community
Builder
Page
Builder
Everything You Need to Build Apps
​ Full spectrum of capabilities from enterprise control to
elastic flexibility

12. Agile and elastic platform that developers love
Smarter infrastructure lets you build apps that scale
Open and extensible
Modern language support and ecosystem of 150+ add-ons
Connected to Force.com
Sync customer apps with business processes
Build Customer-Facing Apps with Heroku

13. HR Help Desk
Employee Intranet
Recruiting &
Onboarding
Performance
& Coaching
IT Help Desk / Self-
Service Community
Legacy Applications
Consolidation
Enterprise
Knowledge
Identity Mgmt
Custom Web /
Mobile Applications
Business Agility
Layer (e.g. Claims,
Underwriting, …)
Asset & Facilities
Management
Financial Shared
Services
M&A Enablement
Early Warning
Management
Product Ideas &
Innovation
Pre-Production
Testing
Warrant Coverage
Decisioning
Procurement
Vendor
Management
Transportation
Logistics
Contract
Management
Budget
Management
Contract
Management
Pricing
Billing
Management
Audit
Management
Force.com - Employee Facing Apps
​
Apps
HR
Produc
t
Supply
Chain
IT
Financ
e
Ops

14. Multi Tenant
>150k customers
40 Prod POD’s
40 Prod DB’s

15. Core Force.com Characteristics
​ Single Code Base
​ Single Schema
​ 3 Upgrades Per Year
​ Secure
​ Durable and Scalable
​ Customizable
​ Easy enough for a Business Analyst
​ Flexible enough for a Coder

16. Pre-Built Apps
​ AppExchange is the #1 Business App Marketplace
Customized for Salesforce
Trusted and Secure
Reviewed by Peers
Over 2,800 apps 3 million installs

17. ​ Overall site peak day
• >3.5 Billion transactions
• 200 milliseconds average
• 60% of transactions via API
requests
​ Typically production instance
• >8,000 Customer Orgs
• 30 App Servers and 8 DB Servers
Salesforce’s Daily Performance
Friday: 3,173,762,799 Transactions

18. 3 Releases Per Year
API backward compatibility ensures ease of deployment
47 Major Releases
100’s of Small Releases Yearly
All Integrations and
Customizations Auto-Upgraded
6BLines of
Apex Code
1BAPI Calls
Per Day,
32
versions
12M
Visualforce
Pages
15MCustom
Database
Tables
1
Version

19. The Composite App

20. The Client Problem

21. Problem: Old Custom UI Technology
​ Server-side generated, page based HTML
HTML
<div>...</div>

22. New UI: Component-based Client-rendered
JSON
component:{...}
<div>...</div>

23. Aura and Lightning Component Framework
Lightning
Component
Framework

24. Lightning Component Design Principles
• Component author namespacing
• Automatic component-based CSS namespacing
• Everything is a component
• Allow for programmatic or point-and-click UI composition
• Enable Salesforce, customers, and partners to build composite UIs
• Works on any form factor

26. Many Components Many Server Trips
XMLHttpRequest
XMLHttpRequest
XMLHttpRequest

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

28. Boxcarring: Many Actions, One XHR
ActionService

29. Caboose: Postpone High Volume Actions
ActionService
• Defer High-Volume Actions
• Action.setCaboose()

30. Action Service: Server Side API
​ Apex: Code on Force.com

31. Action Service Client API

32. Demo

33. Possible Future Features
​ Making actions cacheable
​ Ability to prioritize actions

34. What About the API

35. Comprehensive Suite of APIs and Toolkits
Web Service
Endpoint
Web Service
Endpoint
Apex
WS/REST
Outbound
Messaging
Business Logic
Sync Bulk API
Streaming
API Topic
CRUD
Data
Bayeux
Client
Applications and Middleware
Java SDK Ruby gem
PHP
Toolkit
Mobile
SDK
Mobile
SDK
3rd Party
Adapters
Apex
Callouts

36. Salesforce1 Enterprise APIs
​ The Salesforce “Data” APIs
• Allow programmatic access to your salesforce data through various API technologies
• Many different APIs to suit your specific needs
Rest
APIs
Access and manipulate data with a RESTful pattern with JSON and XML payloads
Soap
APIs
Access and manipulate data using SOAP.
Streaming
APIs
Subscribe to updates using a Bayeux / CometD HTTP Streaming API.
Bulk
APIs
Perform Bulk Queries and Inserts/Updates Asynchronously.

37. Boxcarring, what a great idea!
​ Boxcarring is dependent on Lightning Components
​ Only works with one client interface
​ What about all those API apps out there?
​ If only we could let any client batch together requests…

38. Many Requests Many Server Trips
POST Record
GET Server Gen Data
GET API Limits

39. Composite Batch REST API
.../composite/batch
POST Batch
{
"batchRequests":[
{POST},
{GET},
{GET}
]
}

40. Sample Batch Request
​ POST: <salesforcedomain>/services/data/v35.0/composite/batch
​ {"batchRequests" : [
​ {"method" : "POST",
​ "url" : "v35.0/sobjects/account/",
​ "richInput" : {"Name" : "NewName", "Industry" : "Tech"}},
​ {"method" : "GET",
​ "url" : "v35.0/sobjects/account/describe/"},
​ {"method" : "GET",
​ "url" : "v35.0/query?q=select id, name, industry from account
​ order by createddate desc limit 10"
​ }]
​ }

41. Parent/Child Related Data
POST Account
POST related Contacts
POST related Cases
RESP: Account ID
RESP: Contact IDs
RESP: Case IDs

42. Composite Tree REST API
.../composite/tree/entity
POST Tree
”records":[
{parent1},
{parent2},
{parent3}
]

43. Sample Batch Request
​ POST: <salesforcedomain>/services/data/v35.0/composite/tree/Account
​ {"records" :[
​ {"attributes": {"type":"Account", "referenceId":"ref1"},
​ "name" : "SampleAccount", "phone" : "1234567890",
​ "type" : "Analyst", "industry" : "Banking",
​ "Contacts" : {
​ "records" : [
​ {"attributes": {"type":"Contact", "referenceId":"ref2"},
​ "lastname" : "Smith", "title" : "President"},
​ ...]},
​ "Cases" : {
​ "records" : [
​ {"attributes": {"type":"Case", "referenceId":"ref3"},
​ "" : "", "" : "", "" : ""}
​ ...]}, }}, ...] }

44. Demo

45. Possible Future Features
​ Parameter-based values
​ Basic Orchestration
​ Updates on /tree

46. Free Developer Edition of Force.com
​ http://bit.ly/webcamp-salesforce

47. developer.salesforce.com/trailhead

48. Q & A
Peter Chittum
Developer Evangelist
@pchittum
github.com/pchittum
​ Signup: http://bit.ly/webcamp-salesforce
​ Learn: https://developer.salesforce.com/trailhead
RATE ME!
https://joind.in/15243

49. Thank
you