Extension points in Enterprise Application, ITDays Cluj-Napoca,

1. .

3. Who am I?
: ”vunvulear@outlook.com”,

10. Features
• Component does not know anything about
other components beyond the scope of the
extension contract
• Applications can have more than one
component that extend a specific extension
point

14. Evolution
public class Calculator
{
private string baseValue;
...
public void Add(string value)
{
if (value==null
|| value.Count == 0
|| value == "-")
{
baseValue = baseValue + "-";
}
...
}
}

15. Evolution
public class Calculator
{
private string baseValue;
...
public void Add(string value)
{
if (ContainsDefaultValue(value))
{
baseValue = baseValue + "-";
}
...
}
protected virtual bool ContainsDefaultValue(string value)
{
return (value==null
|| value.Count == 0
|| value == "-");
}
}

16. Natural
Based
on the
needs
Every
iteration
At
design
time

18. Interfaces
Virtual Methods
Abstract Class
Modules
Services
Configuration Files

19. Interfaces
Virtual
Methods
Abstract Class
Modules
Services
Configuration
Files

22. Interfaces
public class MyCalculator : ICalculator
{
public void Add(string value)
{
// Some action
}
void Initialize()
{
// Some action
}
void Refresh()
}
{
}
public interface ICalculator
{
void Add(string value);
void Initialize();
void Refresh();
}

23. Annotation
[InitializeAttribute(typeof(MyInitialize)]
public class MyCalculator : ICalculator
{
public void Add(string value)
{
...
}
void Initialize()
void Refresh()
}
public interface ICalculator
{
void Add(string value);
void Initialize();
void Refresh();
}

25. Print
EP
Internal
Teams
Print
EP
Print
EP
External
Teams
View
EP
Core
Core Team

27. •
•
•
•
Manager
Expiration Policy
Encryption
Backing Store
Caching
• Provider
• CRUD
• Retry Policy
• Hash Algorithm
• Symmetric
Encryption
Data Access
Cryptography

28. • Validator
• Attributes
• Handing
• Formatter
• Listeners
• Filters
• Handler
• Formatter
• Management
Validation
Logging
Exception
• Authorization
• Authentication
• Security Cache
Security

31. Changes
Be prepared for changes
• Frameworks
• Services
• Hardware
• On-premise to Cloud
• Cloud to On-premise

32. Question
Answers

33. {
“name” : “Radu Vunvulea,
“blog” : “vunvulearadu.blogspot.com”
“email” : ”vunvulear@outlook.com”,
“socialMedia” :
{
“twitter” : “@RaduVunvulea”,
“fb” : “radu.vunvulea”
}
}