2015 - Network 2015, UA: Defensive programming, resilience patterns & antifragility

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Cloud computing, DevOps, IOT or just connecting the local active directory or {put any LOB system here}: The applications we build are getting more and more distributed. Now guess who's guilty if your application fails, because there was some error outside of your code (even outside of your control influence)? This session is about designing, developing and deploying rock solid applications.

Software

danielfisher.com
https://www.flickr.com/photos/38295844@N05/4980776534/

danielfisher.com
https://www.flickr.com/photos/pagedooley/2398572388/

danielfisher.com
http://www.city-data.com/forum/anchorage/692696-anchorage-here-we-come-finally.html

danielfisher.com
“Office Space” by Mike Judge / Twentieth Century Fox Film Corporation

danielfisher.com
https://www.flickr.com/photos/bluedharma/89186151

danielfisher.com
https://www.flickr.com/photos/armydre2008/3144377781

danielfisher.com
Time
Change
Big…
Small…

danielfisher.com
https://www.flickr.com/photos/38403488@N08/5100179116

danielfisher.com
https://www.flickr.com/photos/edrost88/8235944730

danielfisher.com
Yoda Conditions
if (variable.Equals("literal"))
{
...
}
if ("literal".Equals(variable))
{
...
}

danielfisher.com
Check Collections for Null
var files = SomeApi.GetFileList();
if (files != null)
{
for (var i = 0; i < files.length; i++)
{
...
}
}

danielfisher.com
All classes are sealed by default
public class Class1
{
...
}
public sealed class Class1
{
...
}

danielfisher.com
DDD Value Object Input Validation
public sealed class ZipCode
: IValueObject
{
public ZipCode(int value)
{
// Input validation!!!
Value = value;
}
public int Value { get; private set;}
}

danielfisher.com
http://research.microsoft.com/en-us/um/people/lamport/pubs/distributed-system.txt

danielfisher.com
https://www.flickr.com/photos/qubodup/8278039181

danielfisher.com
https://www.flickr.com/photos/st3f4n/143623217

danielfisher.com
http://moonbasetshirts.limitedrun.com/products/557785-palpatine-vader-2016

danielfisher.com
https://www.flickr.com/photos/susivinh/16341538221

danielfisher.com
Antifragility
Resilience
Robustness
Fragile

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2015 - Network 2015, UA: Defensive programming, resilience patterns & antifragility

6. danielfisher.com https://www.flickr.com/photos/38295844@N05/4980776534/

7. danielfisher.com https://www.flickr.com/photos/pagedooley/2398572388/

8. danielfisher.com http://www.city-data.com/forum/anchorage/692696-anchorage-here-we-come-finally.html

9. danielfisher.com BOSS

10. danielfisher.com “Office Space” by Mike Judge / Twentieth Century Fox Film Corporation

11. danielfisher.com CHANGE

12. danielfisher.com https://www.flickr.com/photos/bluedharma/89186151

13. danielfisher.com https://www.flickr.com/photos/armydre2008/3144377781

14. danielfisher.com RELEASE

15. danielfisher.com Time Change Big… Small…

16. danielfisher.com

17. danielfisher.com FAIL

18. danielfisher.com https://www.flickr.com/photos/38403488@N08/5100179116

19. danielfisher.com Thomas Edison

20. danielfisher.com

21. danielfisher.com https://www.flickr.com/photos/edrost88/8235944730

22. danielfisher.com Yoda Conditions if (variable.Equals("literal")) { ... } if ("literal".Equals(variable)) { ... }

23. danielfisher.com Check Collections for Null var files = SomeApi.GetFileList(); if (files != null) { for (var i = 0; i < files.length; i++) { ... } }

24. danielfisher.com All classes are sealed by default public class Class1 { ... } public sealed class Class1 { ... }

25. danielfisher.com DDD Value Object Input Validation public sealed class ZipCode : IValueObject { public ZipCode(int value) { // Input validation!!! Value = value; } public int Value { get; private set;} }

32. danielfisher.com http://research.microsoft.com/en-us/um/people/lamport/pubs/distributed-system.txt