Arguments in favor of a progressive software rewrite . It's a presentation about why software should be preserved and . Written and adapted for Byoskill. Byoskill.com

1. Arguments in favor
of a progressive
webapps
Automatic legacy software migration
https://www.byoskill.com

2. 2www.byoskill.com
Why are we there ?

3. 3©2015 – Confidential, metrixware
We are healers
for
unlucky software

4. 4©2015 – Confidential, metrixware
Because
the market goes fast
And software, the victim

5. 5©2015 – Confidential, metrixware
❖ Software ages
❖ Software becomes irrelevant
❖ Software may have broken concepts
❖ Software without love :-(
❖ Fashion is gone
We help a lot of software

6. 6©2015 – Confidential, metrixware
Our unique
skills
● Source to source refactoring
● Static code analysis
● Code (re) generation

7. 7©2015 – Confidential, metrixware
Our tools
Transform the code and
the architecture automatically
➔ Speed up the upgrade of a software
➔ Replacing outdated technologies

8. 8©2015 – Confidential, metrixware
Your gain
➔ Increase the success-rate of
rewrite projects
➔ Shorten the “out of order” effect
➔ Decrease the cost and risk of
migration

9. 9©2015 – Confidential, metrixware
Our Patient
Your software XX

10. 10©2015 – Confidential, metrixware
A great Software
that becomes old

11. 11©2015 – Confidential, metrixware
A common (current) wish :
Transform a monolith application
Into a SaaS/Cloud based solution

12. 12©2015 – Confidential, metrixware
Your software
has
an amazing set
of
functionalities

13. 13©2015 – Confidential, metrixware
Why a progressive rewrite is possible
1. The team loves its product
2. But would like :
a. To feel more confident when a LOC is about to be changed
b. To provide more efficiently new exciting features
c. To live a better technology experience
d. To solve the main architectural problems

14. 14©2015 – Confidential, metrixware
What we want
➔ Robustness
➔ Simplicity
➔ Softness
➔ Productivity
Katrina Asfardi

15. 15©2015 – Confidential, metrixware
What we have
➔ Fragility
➔ Complexity
➔ Rigidity

16. 16©2015 – Confidential, metrixware
What the doctor’s tool says

17. 17©2015 – Confidential, metrixware
What the mama says
An architecture solution
that missed the goal

18. 18©2015 – Confidential, metrixware
Daily routine
● Instability / Fiability problems
○ Productivity problems (never the developer fault!)
○ Technology mess, requires godlike developers
○ Application: IDE Hostile
● Testable problems
○ Tough debugging
○ Not designed for unit tests
○ Not-so-obvious installation and deployment procedure
● Non-standard way of development and technologies
○ Costly to evolve
○ Tightly coupled to the technologies

19. 19©2015 – Confidential, metrixware
What are the evolutions ?

20. 20©2015 – Confidential, metrixware
“Cities grow, cities evolve, cities have parts that simply die while others parts flourish ;
each city has to be renewed in order to meet the needs of its populace…
Software-intensive systems are like that…”
- Grady Booch

21. 21©2015 – Confidential, metrixware
TOP 5 Reasons
… to not attempt a big rewrite
1. It's a critical product for XYZ
2. Its featured-rich content is hard to reproduce
3. It will take longer than you think
a. markets change
b. existing customers may become frustrated
4. XYZ is an experienced software
a. many bugs have been found
b. many bugs have been fixed
c. use has been customized for the customer satisfaction
5. A complete frustration for the team during the whole rewrite

22. 22©2015 – Confidential, metrixware
Our suggestion:
● An incremental (smart) approach
● Refactor and improve the existing base in a
big (automated) jump
● Obtain a functional architecture quickly

23. 23©2015 – Confidential, metrixware
A possible Roadmap
Fix the main
issue
Create
functional
modules
Upgrade the
technologies
Create your
Cloud/SaaS
system
Improve the software factory process

24. 24©2015 – Confidential, metrixware
The tasks
1. Fix the main issue
2. Creation of a functional architecture
a. Functional modules
b. Loosely coupled
3. Externalization of the functionalities shared with other products
4. Technology change for Open-source/Standards
5. Improves the software release process to make it
a. less difficult
b. more DevOps friendly

25. 25©2015 – Confidential, metrixware
Our solution

26. 26©2015 – Confidential, metrixware
Our offer
An IDE Tool
To fix the issue with Automation
Time optimization: min 60%
Cost reduction: >50%

27. 27©2015 – Confidential, metrixware
Better make it
fast and safe
And a whole new road begins right
there...