2010-06 - a smalltalk about salesforce.com with java architects at YaJuG

a smalltalk about Salesforc e with architects

June 30th, 2010 Yves Leblond Leblond
Yves @small_talks
@small_talks

2010 Chatter - VMforce
2009 67 900 1 500 000
2008 51 800 1 100 000 force.com “sites” - GoogleApps link
2007 41 000 850 000 VisualForce - force.com
2006 29 800 646 000 App Exchange
2005 20 500 393 000
2004 13 900 227 000

2003 8 700 127 000
2002 5 700 76 000
2001 3 500 53 000 Fastest Growing Online CRM Company
2000 1 500 3 000 Salesforce CRM - the multi tenant architecture
Founders launch salesforce.com in small San Francisco apartment
1999
“The End of Software” revolution begins

June 30th, 2010 Yves Leblond @small_talks

Cloud computing ?


Cloud computing ?
• everything as a service
(and more) PAAS !
SAAS ! IAAS !
Cloud !

Cloud SA SaaS AG

• consider IT as a facility Cloud
computing
expert summit

provided on demand

The great IAAS leap forward ;-)
Before IAAS After IAAS

add some RAM, CPU, servers
and see what happens...
I have the solution : provision
but had to wait for budget,
some virtual machines ;-)
purchase and delivery... so
think twice

Does anyone knows what this What is this virtual machine
server is there for ? don’t for ? anyway, it costs ‘only’
unplug it ! 100!/month. don’t touch !.
(even in big banks...)


The owner point of
view
more ﬂexible
Cheaper


What may happen if wild
usages (as usual?)
the more systems we
Virtualisation have, the more we are happy !
is our new game ! The worst the software is, the most
Give us more System we have work
fun ! administrators That will never change !


“Good practices usage” is the key to cloud
computing implementation projects

• ITSM ‘in the IAAS cloud’ :
new constraints, but stay rigorous (even more)

• Software design ‘in the PAAS cloud’:
think scalability and cloud deployment

• Learn, then use best practices, cloud application
frameworks, etc...

• Or...

Lets take the developer
(and user) point of view
IAAS (may be) part of the solution.
but not the solution

SOFTWARE DESIGN
USER SOLUTION DESIGN


Which IT components ?
SalesCloud
Applications SAAS ServiceCloud
Custom apps
Transaction/ Google Force.com
PAAS AppEngine
Structured data Force.com sites

Servers IAAS Amazon EC2 (VMForce)

Massive
Amazon S3
Storage

so let’s go !

1. force.com model
2. force.com multitenant architecture
3. force.com and java
4. VMforce (VMWare, force.com & java)


1. force.com model


force.com layers
• Custom Objects : your data
• Native GUI and customization
• Workﬂow, Rules, Security proﬁles, Dashboards,
Reporting ...
• Apex Classes and Triggers : processing
• VisualForce : native MVC framework

Basic Objects

• User, Contact, Account, ...
• Tasks, Notes, ...
• Mail, templates, ...

• ako of groupware layer

Custom objects


Native GUI and customisation


Workﬂows, ...


Apex language
trigger blockDuplicates_tgr on Lead bulk(before insert, before update) {
/*
* begin by building a map which stores the (unique) list of leads
* being inserted/updated, using email address as the key.
*/
Map<String, Lead> leadMap = new Map<String, Lead>();
for (Lead lead : System.Trigger.new) {"
if (lead.Email != null) { // skip null emails
" /* for inserts OR
" * updates where the email address is changing
" * check to see if the email is a duplicate of another in
" * this batch, if unique, add this lead to the leadMap
" */
" if ( System.Trigger.isInsert ||
" " (System.Trigger.isUpdate &&
"lead.Email != System.Trigger.oldMap.get(lead.Id).Email)) {
""
" if (leadMap.containsKey(lead.Email)) {
" lead.Email.addError('Another new lead has the same email address.');
" } else {
" leadMap.put(lead.Email, lead);
" }
" }
}
}

/* Using the lead map, make a single database query,
* find all the leads in the database that have the same email address as
* any of the leads being inserted/updated.
*/ June 30th, 2010 Yves Leblond @small_talks
for (Lead lead : [select Email from Lead where Email IN :leadMap.KeySet()]) {

Apex usage

• triggers
• classes (internal or web services)
• batch processing
• Visualforce controllers
• ...

SOQL - SOSL
• SOQL (Salesforce Object Query Language)
• “select” : more or less the SQL logic for querying
objects stored in DB
• “insert, update, delete” : used for loaded/instantiated
objects (one or many per request), not like SQL
processing logic (more like a “persistence layer”).
• SOSL (Salesforce Object Search Languages)
• text based search (full text indexes)

Visual force
• Salesforce MVC development model


Security and
user management
• by roles (company organigram)
• by proﬁle (manager, vendor, project mgr)
• can be reﬁned using complexe rules (e.g.
depending of attributes values)
• immediate and automatic propagation

Proﬁles, roles


Packaging
• a set of custom object deﬁnitions, classes,
trigger deﬁnitions,VisualForce components

• “packaged” together

• to be moved from on org to another

• Versioning and dependancies

• Installation and uninstallation (removing associated data)

• Unit tests mandatory !

• 75% of code must be covered by unit tests before
being packaged...


Sandbox
• a complete copy of your company data (called your
“organisation”), where you can :
• deploy new packages version
• deploy other company applications
• and test them for real
Have you ever dream of such a test environment ???
think to the efforts, human and ﬁnancial ressources,
to have a test environment always up to date...


force.com governor
Governor limit : execution time, external calls per
transaction, SOQL statements per transaction, ...

Limit Trigger Anonymous Block, ...

Total number of SOQL queries issued2 20 100
Total number of records retrieved by SOQL queries 1000 10000
Total number of SOSL queries issued 0 20
Total number of records retrieved by a single SOSL query 0 200
Total number of DML statements issued (insert, update, upsert, merge, delete,
or database.emptyRecycleBin) 20 100

Total number of records processed as a result of DML statements or
database.emptyRecycleBin 100 10000

....

force.com governor

The governor is there to guarantee
performance and scalability fo all
customers.


Best practices

Governor (performance constraints), mandatory unit
tests, bulk management processing and most of the
salesforce constraints
help also developer to apply best software practices

even if it is sometimes frustrating ;-), if used to “Code and Go Live”.


3. At the heart :

the multitenant
architecture

“There is only one salesforce
database worldwide shared by all
salesforces organisations and
customers”

And it is a giant Oracle Database, located in US,
Singapore, and next in Europe data centers.

Multitenant architecture


Physical architecture


“There is only one object table”

A complete heterodox design ;-)

Texte


Query processing


This is where important
part of SF “know how” is
(patented) : how to
guarantee request
response time....

Salesforce rebuild a query engine for the databases
in order to manage
300.000.000 transactions every day,
very little servers
and an average response time of 270ms

see http://trust.salesforce.com for live stats


and Java ?
• Internally, there is a lot of java :
• APEX is precompiled in java code
• it seems that VisualForce generates Java
Faces code
• ...
• But you don’t see it ;-)

3. force.com java API


One of the integration options

• Flex • Amazon • Python
• .net & VB • AJAX • Cocoa
• Ruby • java
• Google • PHP • Any WSDL consumer
(APEX classes can be

• Perl • Facebook declared as web
services)


Data management
using “Enterprise WSDL”

strongly typed, based on
package deﬁnition

try {
binding = (SoapBindingStub) new SforceServiceLocator().getSoap();
} catch (ServiceException ex1) {
System.out.println(ex1.getMessage());
return;
}
try {
lr = binding.login(userName, pwd);
} catch (UnexpectedErrorFault ex2) {
connect
System.out.println(ex2.getExceptionMessage() + "nn"
return;
} catch (LoginFault ex2) {
System.out.println(ex2.getExceptionMessage() + "nn");
return;
} catch (RemoteException ex2) {
System.out.println(ex2.getMessage() + "nn");
return;
}
// create a variable to hold the query result
QueryResult qr = null;
// call the query saving the results in qr SOQL request
try {
qr = binding
.query("select Name, numberOfEmployees, Id, Industry from Account");
} catch (UnexpectedErrorFault uef) {
System.out.println(uef.getExceptionMessage() + "nn");
return;
} catch (Exception e) {
e.printStackTrace();
System.out.println("nn");

java
return;
}
if (qr != null) {
SObject[] records = qr.getRecords();
_accounts = new Account[records.length];
// we can loop through the returned records
for (int i = 0; i < records.length; i++) {
// Because we asked for accounts we will convert
// the SObject for each record into an Account object
Account account = (Account) records[i];
_accounts[i] = account;
// Now we can access any of the fields we had in the query
// select clause directly from the account variable
System.out.print(new Integer(i).toString() + ". ");
System.out.print(account.getName() + " - ");
System.out.println(account.getId());
}


Data management
using “Partner WSDL”

weakly typed, based on
generic metadata infos

private void querySample() {
...

QueryResult qr = null;
QueryOptions qo = new QueryOptions();
qo.setBatchSize(new Integer(3));
binding.setHeader(new SforceServiceLocator().getServiceName()
.getNamespaceURI(), "QueryOptions", qo);
SOQL request
try {
qr = binding.query("select FirstName, LastName from Contact");
int loopCount = 0;
boolean continueLoop = true;
while (continueLoop) {
java, but
// process the query results
for (int i = 0; i < qr.getRecords().length; i++) {
SObject con = qr.getRecords()[i];
laborious.
String fName = "";
String lName = "";
(like in old JDBC)
if (con.get_any()[0].getName().toLowerCase().equals(
"firstname")) {
fName = con.get_any()[0].getValue();
lName = con.get_any()[1].getValue();
} else
lName = con.get_any()[0].getValue();

if (fName == null) {
System.out.println("Contact " + (i + 1) + ": " + lName);
} else {
System.out.println("Contact " + (i + 1) + ": " + fName
+ " " + lName);
}
}
// handle the loop + 1 problem by checking to see if the most
// recent queryResult
if (qr.isDone())
continueLoop = false;
else
qr = binding.queryMore(qr.getQueryLocator());
}
System.out.println("nQuery succesfully executed.");
getUserInput("nHit return to continue...");
} catch (ApiFault af) {
System.out
.println("nFailed to execute query succesfully, error message was: n"
+ af.getExceptionMessage());
June 30th, 2010
getUserInput("nHit return to continue...");
} catch (Exception ex) {
Yves Leblond @small_talks

Even metadata
management can be
done in Java...


ex : creation of a new kind of
Custom Object type
private void createCustomObject()
{
"
"
CustomObject co = new CustomObject();
String name = "My Custom Object";
NB :
"
"
co.setFullName("MyCustomObject" + "__c");
co.setDeploymentStatus(DeploymentStatus.Deployed);
the Force.com IDE
"
"
co.setDescription("Created by the Metadata API Sample");
co.setEnableActivities(true); (eclipse plugin)
"
"
co.setLabel(name);
co.setPluralLabel(co.getLabel() + "s"); use this.
" co.setSharingModel(SharingModel.ReadWrite);
" CustomField nf = new CustomField();
" nf.setType(FieldType.Text);
" nf.setDescription("The custom object identifier on page layouts, " +
"related lists etc");
" nf.setLabel("My Custom Object");
" nf.setFullName("MyCustomObject" + " __c");
null)try { AsyncResult[] ars = metadatabinding.create(new CustomObject[] { co }); if (ars ==
" {
" " System.out.println("The object was not created successfully"); return;
" }
" String createdObjectId = ars[0].getId();"
" String[] ids = new String[] {createdObjectId};
" boolean done = false;
" long waitTimeMilliSecs = ONE_SECOND;
" AsyncResult[] arsStatus = null;
"
" ….


4.VMforce ?


VMforce ?
• VMforce : Spring applications on top of this
• Custom Objects : your data
• Native GUI and customization
• Workﬂow, Rules, Security proﬁles, ...
• Apex Classes and Triggers : processing
• VisualForce : native MVC framework

• Spring :

• Spring Framework

• SpringSource TC server (Server® runtime, the Enterprise version of
Apache Tomcat)

• force.com

• force.com services

• force.com database

• everything we talked before : including automatic scalability, high
availability, auto-tuning, back up and disaster recovery....

• VMware

• vCloud technology: Automatic management of the Java stack that
powers VMforce applications

• VMware vSphere: Industry leading virtualization platform will provide
the resource isolation, management, and virtualization


VMforce


one many more
things...


2010-06 - a smalltalk about salesforce.com with java architects at YaJuG

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