1. Advanced Developer Workshop
Joshua Birk
Developer Evangelist
@joshbirk
joshua.birk@salesforce.com
Gordon Jackson
Solution Architect
gjackson@salesforce.com
2. Safe Harbor
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 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, 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, risks associated with 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 quarter ended
July 31, 2011. This document and others 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 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.
14. Unit Testing
Assert all use cases
Maximize code coverage
Test early, test often
o Logic without assertions
o 75% is the target
o Test right before deployment
16. Testing Context
// this is where the context of your test begins
Test.StartTest();
//execute future calls, batch apex, scheduled apex
// this is where the context ends
Text.StopTest();
System.assertEquals(a,b); //now begin assertions
17. Testing Permissions
//Set up user
User u1 = [SELECT Id FROM User
WHERE Alias='auser'];
//Run As U1
System.RunAs(u1){
//do stuff only u1 can do
}
23. Indexed Fields
• Primary Keys
• Id
• Name
• OwnerId
Using a query with two or more indexed filters greatly increases performance
• Audit Dates
• Created Date
• Last Modified Date
• Foreign Keys
• Lookups
• Master-Detail
• CreatedBy
• LastModifiedBy
• External ID fields
• Unique fields
• Fields indexed by
Saleforce
24. SOQL + Maps
Map<Id,Id> accountFormMap = new Map<Id,Id>();
for (Client_Form__c form : [SELECT ID, Account__c FROM
Client_Form__c
WHERE Account__c
in :accountFormMap.keySet()])
{
accountFormMap.put(form.Account__c, form.Id);
}
Map<ID, Contact> m = new Map<ID, Contact>(
[SELECT Id, LastName FROM Contact]
);
25. Child Relationships
List<Invoice__c> invoices = [SELECT Name,
(SELECT Merchandise__r.Name
from Line_Items__r)
FROM Invoice__c];
List<Invoice__c> invoices = [SELECT Name,
(SELECT Child_Field__c
from Child_Relationship__r)
FROM Invoice__c];
26. SOQL Loops
public void massUpdate() {
for (List<Contact> contacts: [SELECT FirstName, LastName
FROM Contact])
{
for(Contact c : contacts) {
if (c.FirstName == 'Barbara' &&
c.LastName == 'Gordon') {
c.LastName = 'Wayne';
}
}
update contacts;
}
}
27. ReadOnly
<apex:page controller="SummaryStatsController" readOnly="true">
<p>Here is a statistic: {!veryLargeSummaryStat}</p>
</apex:page>
public class SummaryStatsController {
public Integer getVeryLargeSummaryStat() {
Integer closedOpportunityStats =
[SELECT COUNT() FROM Opportunity WHERE
Opportunity.IsClosed = true];
return closedOpportunityStats;
}
}
28. SOQL Polymorphism
List<Case> cases = [SELECT Subject,
TYPEOF What
WHEN Account THEN Phone, NumberOfEmployees
WHEN Opportunity THEN Amount, CloseDate
END
FROM Event];
29. Offset
SELECT Name
FROM Merchandise__c
WHERE Price__c > 5.0
ORDER BY Name
LIMIT 10
OFFSET 0
SELECT Name
FROM Merchandise__c
WHERE Price__c > 5.0
ORDER BY Name
LIMIT 10
OFFSET 10
30. AggregateResult
List<AggregateResult> res = [
SELECT SUM(Line_Item_Total__c) total,
Merchandise__r.Name name
from Line_Item__c
where Invoice__c = :id
Group By Merchandise__r.Name
];
List<AggregateResult> res = [
SELECT SUM(INTEGER FIELD) total,
Child_Relationship__r.Name name
from Parent__c
where Related_Field__c = :id
Group By Child_Relationship__r.Name
];
35. Reducing Viewstate
//Transient data that does not get sent back,
//reduces viewstate
transient String userName {get; set;}
//Static and/or private vars
//also do not become part of the viewstate
static private integer VERSION_NUMBER = 1;
36. Reducing Viewstate
//Asynchronous JavaScript callback. No viewstate.
//RemoteAction is static, so has no access to Controller context
@RemoteAction
public static Account retrieveAccount(ID accountId) {
try {
Account a = [SELECT ID, Name from ACCOUNT
WHERE Id =:accountID LIMIT 1];
return a;
} catch (DMLException e) {
return null;
}
}
37. Handling Parameters
//check the existence of the query parameter
if(ApexPages.currentPage().getParameters().containsKey(„id‟)) {
try {
Id aid = ApexPages.currentPage().getParameters().get(„id‟);
Account a =
[SELECT Id, Name, BillingStreet FROM Account
WHERE ID =: aid];
} catch(QueryException ex) {
ApexPages.addMessage(new ApexPages.Message(
ApexPages.Severity.FATAL, ex.getMessage()));
return;
}
}
38. SOQL Injection
String account_name = ApexPages.currentPage().getParameters().get('name');
account_name = String.escapeSingleQuotes(account_name);
List<Account> accounts = Database.query('SELECT ID FROM
Account WHERE Name = '+account_name);
39. Cookies
//Cookie =
//new Cookie(String name, String value, String path,
// Integer milliseconds, Boolean isHTTPSOnly)
public PageReference setCookies() {
Cookie companyName =
new Cookie('accountName','TestCo',null,315569260,false);
ApexPages.currentPage().setCookies(new Cookie[]{companyName});
return null;
}
public String getCookieValue() {
return ApexPages.currentPage().
getCookies().get('accountName').getValue();
}
40. Inheritance and Construction
public with sharing class PageController
implements SiteController {
public PageController() {
}
public PageController(ApexPages.StandardController stc) {
}
41. Controlling Redirect
//Stay on same page
return null;
//New page, no Viewstate
PageReference newPage = new Page.NewPage();
newPage.setRedirect(true);
return newPage;
//New page, retain Viewstate
PageReference newPage = new Page.NewPage();
newPage.setRedirect(false);
return newPage;
42. Unit Testing Pages
//Set test page
Test.setCurrentPage(Page.VisualforcePage);
//Set test data
Account a = new Account(Name='TestCo');
insert a;
//Set test params
ApexPages.currentPage().getParameters().put('id',a.Id);
//Instatiate Controller
SomeController controller = new SomeController();
//Make assertion
System.assertEquals(controller.AccountId,a.Id)
52. Any Language, Any Platform
• Only has to be accessible from the user’s browser
• Authentication via OAuth or Signed Response
• JavaScript based SDK can be associated with any language
• Within Canvas, the App can make API calls as the current user
• apex:CanvasApp allows embedding via Visualforce
Canvas Anatomy
58. DOM Control
accountDiv = j$(id*=idname);
accountDiv.hide();
accountDiv.hide.removeClass('bDetailBlock');
accountDiv.hide.children().show();
//make this make sense
Call common functions
Manipulate CSS Directly
Interact with siblings and children
Partial CSS Selectors
64. Controlling Flow
trigger LineItemTrigger on Line_Item__c (before insert,
before update) {
//separate before and after
if(Trigger.isBefore) {
//separate events
if(Trigger.isInsert) {
System.debug(„BEFORE INSERT‟);
DelegateClass.performLogic(Trigger.new);
//
65. Delegates
public class BlacklistFilterDelegate
{
public static Integer FEED_POST = 1;
public static Integer FEED_COMMENT = 2;
public static Integer USER_STATUS = 3;
List<PatternHelper> patterns {set; get;}
Map<Id, PatternHelper> matchedPosts {set; get;}
public BlacklistFilterDelegate()
{
patterns = new List<PatternHelper>();
matchedPosts = new Map<Id, PatternHelper>();
preparePatterns();
}
66. Static Flags
public with sharing class AccUpdatesControl {
// This class is used to set flag to prevent multiple calls
public static boolean calledOnce = false;
public static boolean ProdUpdateTrigger = false;
}
67. Chatter Triggers
trigger AddRegexTrigger on Blacklisted_Word__c (before insert, before update) {
for (Blacklisted_Word__c f : trigger.new)
{
if(f.Custom_Expression__c != NULL)
{
f.Word__c = '';
f.Match_Whole_Words_Only__c = false;
f.RegexValue__c = f.Custom_Expression__c;
}
else
f.RegexValue__c = RegexHelper.toRegex(f.Word__c,
f.Match_Whole_Words_Only__c);
}
}
73. Batchable Interface
global with sharing class WarehouseUtil
implements Database.Batchable<sObject> {
//Batch execute interface
global Database.QueryLocator start(Database.BatchableContext BC){
//setup SOQL for scope
}
global void execute(Database.BatchableContext BC,
List<sObject> scope) {
//Execute on current scope
}
global void finish(Database.BatchableContext BC) {
//Finish and clean up context
}
79. Apex SOAP
global class MyWebService {
webService static Id makeContact(String lastName, Account a) {
Contact c = new Contact(lastName = 'Weissman',
AccountId = a.Id);
insert c;
return c.id;
}
}
80. Apex REST
@RestResource(urlMapping='/CaseManagement/v1/*')
global with sharing class CaseMgmtService
{
@HttpPost
global static String attachPic(){
RestRequest req = RestContext.request;
RestResponse res = Restcontext.response;
Id caseId = req.requestURI.substring(req.requestURI.lastIndexOf('/')+1);
Blob picture = req.requestBody;
Attachment a = new Attachment (ParentId = caseId,
Body = picture,
ContentType = 'image/
82. Outgoing Email
Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
String body = count+' closed records older than 90 days have been deleted';
//Set addresses based on label
mail.setToAddresses(Label.emaillist.split(','));
mail.setSubject ('[Warehouse] Dated Invoices');
mail.setPlainTextBody(body);
//Send the email
Messaging.SendEmailResult [] r =
Messaging.sendEmail(new Messaging.SingleEmailMessage[] {mail});
83. Incoming Email
global class PageHitsController implements Messaging.InboundEmailHandler {
global Messaging.InboundEmailResult handleInboundEmail(
Messaging.inboundEmail email,
Messaging.InboundEnvelope env)
{
if(email.textAttachments.size() > 0) {
Messaging.InboundEmail.TextAttachment csvDoc =
email.textAttachments[0];
PageHitsController.uploadCSVData(csvDoc.body);
}
Messaging.InboundEmailResult result = new
Messaging.InboundEmailResult();
result.success = true;
return result;
}
97. Double-click to enter title
Double-click to enter text
@forcedotcom
@joshbirk
@metadaddy
#forcedotcom
98. Double-click to enter title
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Join A
Developer User Group
http://bit.ly/fdc-dugs
LA DUG:
http://www.meetup.com/Los-Angeles-
Force-com-Developer-Group/
Leader: Nathan Pepper
99. Double-click to enter title
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Become A
Developer User Group Leader
Email:
April Nassi
<anassi@salesforce.com>
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http://developer.force.com
http://www.slideshare.net/inkless/
elevate-advanced-workshop
102. Thank You
Joshua Birk
Developer Evangelist
@joshbirk
joshua.birk@salesforce.com
Matthew Reiser
Solution Architect
@Matthew_Reiser
mreiser@salesforce.com
Notes de l'éditeur
Check this again – find that transaction / average time stat
Here is an overview of what our data model will look like. Recommended: Break into a demo of building data in the browser, either custom object wizard or schema builder depending on audience/workbooks
We are going to start the day by talking about unit testing, and then in a bit SOQL. Because these are aspects of the platform which are really a dialtone, something we should be constantly evolving with.And yes, that’s a real bug. The first real bug.So if our new fictional job is to enhance this existing Warehouse application, how we write our unit tests are going to be very important.
So let’s talk about what some of your best practices are? Or if you’re brave, some of your worst?OK, let’s actually look at some really bad examples.
So to recap – Unit Tests should prove out not just code, but use cases. You should try to cover as much of your code as possible. And when should you test?
One theor
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
Indexed fields are fields tracked specifically by the database, and hence can lend to greater performance when your queries use them.
Apex can automatically create Maps from any SOQL result, and you can use that feature to either easily loop through the results or even to easily track the result in the map. For instance, the example here on the bottom would make it possible to find a specific contact in the result with one call from the map.
It’s also good to remember that you can pull children from the parent in one SOQL call. Let’s take a look at that in the Dev Console.SELECT Name, (SELECT Merchandise__r.Name from Line_Items__r) from Invoice__c LIMIT 5
You can also assign the SOQL result directly to a list, and then loop through that array. This allows you to quickly bulkify your code by generating loops and then performing any necessary DML when those loops are done.
One feature added recently to SOQL was the ability to use a readOnly annotation or flag to declare the results unusable in DML, but greatly expanding the number of results that can be handles. For instance, this visualforce page would normally only be able to handle an array of 1,000, but with readOnly that limit is relaxed to 10,000.
Some of the fields in the database are polymorphic, but until a few releases ago – SOQL didn’t really recognize that fact. Now that it does, you can cue specific results from those fields based on their Sobject type. Here’s an example in the Dev Console.SELECT Subject, TYPEOF What WHEN Account THEN Phone, NumberOfEmployees WHEN Opportunity THEN Amount, CloseDate ENDFROM Event
OFFSET allows you to create paginated results easily. The query on the left would give us the first 10 results, and the query on the right would give us the next 10. To see that in the Dev Console:SELECT NAME from Merchandise__c LIMIT 5 OFFSET 0SELECT NAME from Merchandise__c LIMIT 5 OFFSET 10(Or use Contact depending on the org)Now one key limit on OFFSET is that the maximum offset is 2000, so you’ll need to be paginating through a recordset smaller than that.
Aggregate searches allow a developer to do powerful mathematical searches against the database. In the example on the top here, you’ll get a count of merchandise by name for a specific invoice. Think of it like a highly customizable rollup field.The example on the bottom takes that same search, but shows you how it is split up. We’re summarizing an integer field, getting a child name field and then grouping it by that field. Here’s another example, where we can see how much a line item is worth by merchandise:SELECT SUM(Quantity__c) quantity, Merchandise__r.Name name from Line_Item__c Group By Merchandise__r.Name
The platform now supports geolocation. In order to do a dynamic search, like above, you’ll need to construct the string and then use a dynamic query. Using these queries, you could easily gather data based on physical location, for instance if you wanted to find the contact closest to where you parked.Here’s an example in the dev console:SELECT Name FROM Account WHERE DISTANCE(Location__c, GEOLOCATION(37.7945391,-122.3947166), 'mi') < 1
So SOSL isn’t exactly new – we’ve had in the system for some time. But if you are trying to search across different Sobject types, nothing beats it. Here we can find Tim even if he is a contact or account. Let’s look at an example in the Dev Console:FIND {Tim} IN Name Fields RETURNING lead(id, name), contact(id, name, LastModifiedDate), account(id, name, LastModifiedDate), user(id, name, LastModifiedDate) LIMIT 5
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
Explain the ID trick, - for SOQL injection protection
Explain the ID trick, - for SOQL injection protection
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
Controller testing should also include page reference asserts if you are moving from page to page
We’re used to thinking about Visualforce as a component based library, and that let’s us create HTML based interfaces very quickly and easily by binding those components to data. But what about using those components to mix and match Visualforce across your instance?
For instance, you can use Visualforce to create very custom dashboards, and then put those on your homepage. Here’s an example I’ve got with the Warehouse app, which is showing recently created Invoices:( /home/home.jsp )Now if I click into one of those Invoices, we’re also seeing visualforce.
Because, and this is probably one of the more common use cases for Visualforce, anything with a Standard Controller can be used in place of the standard list, view, edit style pages. On this page, I’m still displaying the page layout via the detail component, but we wanted to be able to leverage a new footer across different detail pages(show WarehouseDetail
And we’re keeping that new detail consistent by using a template. We can define our inserts, and then define our content. This allows us to maintain a lot of different look and feels across different object types, but controlling the parts that will the same in one place.
And of course, as we customize that layout, we can create custom components which can take incoming attributes and then render what we need. For instance, in my footer I am using a visualization jQuery plugin called isotope, which allows us to view the line items in a very different way than the related list. You’ll see more about jQuery later.
And of course, if I want that Visualforce in the middle of my layout, I can use a StandardController to embed that right into it. In fact, in this layout – this section is not being generated here on Salesforce.
It’s actually using Canvas, which allows me to easily put third part applications into Salesforce in a secure manner.
For instance, maybe I have a large internal intranet applications. I don’t want to port all that functionality into Salesforce, but I do want to be able to integrate this one interface.
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
Apex controllers are probably the most common use case for the language, but triggers merit a second place.
And with all of those potentials triggers in your system, they can easily get out of hand. There are a few best practices people have found to make them more maintainable.First, consider having only one trigger per object. Within the trigger class itself, break out every possible event, before and after, and start putting system.debugs around them. At the very least, this will make it very easy to track down in debug logs where the logic is getting fired.Second, consider handing off the actual logic to delegate classes. Send them the current scope of the trigger and let them sort it out. This will neatly divide the functionality that your trigger is trying to accomplish.
A delegate also gives you more breathing room. Look at all the variables we are using to properly track what this delegate wants to do – if you started stacking all the logic into the trigger itself, this will start to get unruly really fast. Don’t let your triggers become a battleground, they should be more like highways.
Another trick is using static variables in another class to track progress in your trigger. Changes to these flags will be visible for the span of the trigger context. So if, for instance, another process kicks off your trigger logic a second time, and you don’t want it to – you could swap the first flag here to true, and then not execute any logic if that flag is true.
And remember one of the more powerful uses of triggers is in association with Chatter. Let’s take a look at a Force.com labs app, Chatter Blacklist, which illustrates this very well.
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?
Self Service case structure by Email
Update this subtitle
How does privacy work with Chatter? Can you accidentally share a record I’m not supposed to see?