The document discusses porting legacy applications to Spring Boot in one week. It describes how a legacy backend-as-a-service application at Turkcell was migrated to Spring Boot, redesigning the architecture and reimplementing it as a simple Spring web application. This resulted in faster development and running, and improved throughput and number of sessions without any changes needed to mobile clients. Ongoing projects at Turkcell are also now built with Spring Boot.

1. Porting legacy apps to Spring Boot in one week
By Erdem Günay (@gunayus)
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2. About Turkcell
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3. About Turkcell
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4. How I met Spring Boot?
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5. Turkcell Video – legacy BaaS
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6. Turkcell Video – legacy BaaS
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7. Porting to Spring Boot – end of 1st hour
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http://spring.io/guides/gs/actuator-service/

8. Porting to Spring Boot – end of 1st day
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9. Porting to Spring Boot – end of 1st day
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10. Porting to Spring Boot – end of the week
• All the legacy REST APIs are migrated to @RestController(s)
• Architecture is redesigned
• Reimplemented as true, simple Spring 4 web application
• Zero mobile client update
• Faster development, running & debugging
• Jboss netty  Apache web server & Tomcat 7
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11. Porting to Spring Boot – number of sessions
%100
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12. Porting to Spring Boot – throughput
500
450
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50
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0
Throughput (GB)
Total

13. Android Remote App Configuration
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14. Android Remote App Configuration
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15. Android Remote App Configuration
[operation] == 'command' and [manufacturer] == ‘turkcell' and [model] == 't50‘
{
"operation": "command",
"manufacturer": "turkcell",
"model": "t50",
"appVersion": "31",
"board": "MSM8226",
"device": "msm8226",
"hardware": "qcom",
"networkCountryIso": "tr",
"resolution": "720x1184"
}
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16. Ongoing projects
• All new projects are "bootiful"
• Object storage project with 1 Million users and 2 PB storage
capacity
• Mobile analytics platform 90 Million transactions per day
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Spring
Framework
Spring
Security
Spring
Data
Spring
Integration
Spring
Social
Spring REST &
Web Services
Spring
Boot

17. Thanks
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@gunayus