Boxcars and Cabooses: When one more XHR is too much - Peter Chittum - Codemotion Amsterdam 2016

Boxcars and
Cabooses
When one more XHR is too much
Peter Chittum
Developer Evangelist
@pchittum
github.com/pchittum
Cleaning up your CRUDdy API

Forward Looking Statement
Safe harbor statement under the Private Securities Litigation Reform Act of 1995:
This presentation may contain forward-looking statements that involve risks, uncertainties, and assumptions. If any such uncertainties materialize 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 projections of
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
service, new products and services, our new business model, our past operating losses, possible fluctuations in our operating results and rate of growth,
interruptions or delays in our Web hosting, breach of our security measures, the outcome of any litigation, risks associated with completed and any
possible mergers and acquisitions, the immature market in which we operate, our relatively limited operating history, our ability to expand, retain, and
motivate our employees and manage our growth, new releases of our service and successful customer deployment, our limited history reselling non-
salesforce.com products, and utilization and selling to larger enterprise customers. Further information on potential factors that could affect the financial
results of salesforce.com, inc. is included in our annual report on Form 10-K for the most recent fiscal year and in our quarterly report on Form 10-Q for
the most recent fiscal quarter. These documents and others containing important disclosures are available on the SEC Filings section of the Investor
Information section of our Web site.
Any unreleased services or features referenced in this or other presentations, press releases or public statements are not currently available and 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.

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

Force.com - Employee Facing Apps
 
Apps
HR Product
Supply
Chain
ITFinanceOps

Multi Tenant
150k customers
40 Prod POD’s
40 Prod DB’s

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

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
3rd Party
Adapters
Apex
Callouts

 Overall site peak day
•  >4 Billion transactions
•  200-250 milliseconds average
•  ~30% of transactions via API
requests
Salesforce’s Daily API Performance
Yesterday: ???  Source: trust.salesforce.com

Automatic REST Endpoint Creation
 POST
/services/data/v35.0/sobjects/Account
BODY: {
"Name" : "CodeMotion Amsterdam",
"BillingCountry" : "Netherlands"
}

Create Record
 POST
/services/data/v35.0/sobjects/Account
BODY: {
"BillingCountry" : "Netherlands"
}

Fetch Record
 GET
/services/data/v35.0/sobjects/Account/0012400000NBMWyAAP
SUCCESS RESPONSE: {
"attributes" : {"type" : "Account”,"url" : "...”},
"Id" : "0012400000NBMWyAAP",
"BillingCountry" : "Netherlands",
...
}

Query Endpoint
 GET
/services/data/v35.0/query?q=SELECT ... FROM Account WHERE ...
SUCCESS RESPONSE: { "totalSize" : 2,
"done" : true,
"records" : [
{"attributes" : {"type" : "Account","url" : "..."},
"Id" : "0012400000NBMWyAAP",
"Name" : "Test 123",...},
{...}, ...]}

Describe (Discover)
 GET
/services/data/v35.0/sobjects/Account/describe
SUCCESS RESPONSE: {
...
"queryable" : true,
"searchable" : true,
"updateable" : true,
...
}

Limits
 GET
/services/data/v35.0/limits
SUCCESS RESPONSE: {
...
"DailyBulkApiRequests": {"Max" : 5000,"Remaining" : 5000},
"DailyStreamingApiEvents": {"Max" : 10000,"Remaining" : 9996},
"DataStorageMB" : {"Max" : 5,"Remaining" : 5},
...
}

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

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

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/query?q=select id, name, industry from account
  order by createddate desc limit 10"},
  {"method" : "GET",
  "url" : "v35.0/limits"
  }]
 }

Sample Batch Response Object
 {
  "hasErrors": false,
  "results": [
  { "statusCode": 201, "result": {...} },
  { "statusCode": 200, "result": {...} },
  { "statusCode": 200, "result": {...} }
  ]
 }

Batch Request Behavior
•  Resource which accepts multiple REST calls to execute
•  Up to 25 sub-requests
•  URI, Method, and optional Body
•  Sub-requests can be unrelated API calls
•  Sub-requests are executed serially, in order, and as the running user
•  Commit each subrequest on completion
•  Optional parameter: haltOnError
•  Do not continue after error occurs
•  But check subrequests for errors

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

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

Sample Tree Request
 POST: <salesforcedomain>/services/data/v35.0/composite/tree/Account
 {"records" :[
  {"attributes": {"type":"Account", "referenceId":"ref1"},
  "name" : "CodeMotion", "phone" : "1234567890",
  "type" : "Customer", "industry" : "Events",
  "Contacts" : {
  "records" : [
  {"attributes": {"type":"Contact", "referenceId":"ref2"},
  "lastname" : "Smith", "title" : "Organizer"},
  ...]},
  "Cases" : {
  "records" : [
  {"attributes": {"type":"Case", "referenceId":"ref3"},
  "" : "", "" : "", "" : ""}
  ...]}, }}, ...] }

Sample Tree Request: Many Records
 {"records" :[
  "Contacts" : {
  "records" : [
  ...]},
  "Cases" : {
  "records" : [
  "" : "", "" : "", "" : ""}
  ...]}, }}, ...] }

Sample Tree Request: Parent Record
 {"records" :[
  "Contacts" : {
  "records" : [
  ...]},
  "Cases" : {
  "records" : [
  "" : "", "" : "", "" : ""}
  ...]}, }}, ...] }

Sample Tree Request: Child Records
 {"records" :[
  "Contacts" : {
  "records" : [
  ...]},
  "Cases" : {
  "records" : [
  "" : "", "" : "", "" : ""}
  ...]}, }}, ...] }

Sample Tree Request: Client Ids
 {"records" :[
  "type" : "Analyst", "industry" : "Events",
  "Contacts" : {
  "records" : [
  ...]},
  "Cases" : {
  "records" : [
  "" : "", "" : "", "" : ""}
  ...]}, }}, ...] }

The (Near) Future
 Extension of Batch and Composite
 Outputs from one sub request to be used as inputs for the another

Possible Future Features
 Parameter-based values
 Basic orchestration baked into /batch
 Updates on /tree

Aura and Lightning Component Framework
Lightning
Component
Framework

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

Many Components Many Server Trips
XMLHttpRequest
XMLHttpRequest
XMLHttpRequest

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

Boxcarring: Many Actions, One XHR
ActionService

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

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

Upcoming Features
 Integration of oﬄine data store with Action service
 Ability to prioritize actions

Takeaways
 Minimize server requests
 Optimize CRUD-based APIs with aggregation
 Optimize creation of hierarchical data
 Client-side libraries to support request batching

 Meetup: bit.ly/ams-sf-devs

Q & A
Peter Chittum
Developer Evangelist
@pchittum
github.com/pchittum
 Learn: developer.salesforce.com/trailhead
 Meetup: bit.ly/ams-sf-devs

Boxcars and Cabooses: When one more XHR is too much - Peter Chittum - Codemotion Amsterdam 2016

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Boxcars and Cabooses: When one more XHR is too much - Peter Chittum - Codemotion Amsterdam 2016