"Bootiful" JRebel

Spring's about as efficient a way to build applications on the JVM as they come, but the JVM itself offers some room for improvement. Class changes, for example, require redeploys and dramatically slow down a developer's iteration cycle. ZeroTurnaround's JRebel can help! It knows how to reload all manner of class changes (add new methods, fields, constructors, methods, etc.) _and_ inform the frameworks (like Spring and JPA) that sit above those reloaded classes of the changes. In this talk, Adam Koblentz and I look at how to get started, and keep going, faster than ever before!

Transcript

1. Josh Long (⻰龙之春)
   @starbuxman
   jlong@pivotal.io
   github.com/joshlong
   the reloaded revolution
   “ BOOTIFUL”
   Adam Koblentz
   @akoblentz
   adam@zeroturnaround.com
   zeroturnaround.com/jrebel
   

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2. Adam Koblentz
   @akoblentz adam@zeroturnaround.com
   Product Marketing Manager - JRebel, ZeroTurnaround
   Used to write enterprise Java code for
   a financial company, now tries to
   improve the lives of Java developers
   everywhere
   |
   

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3. Josh Long (⻰龙之春)
   @starbuxman jlong@pivotal.io
   |
   Jean Claude
   van Damme! Java mascot Duke some thing’s I’ve authored...
   Spring Developer Advocate, Pivotal
   

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4. Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under a
   
   Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
   4
   Revolutionary tools for developing quality
   software faster.
   

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5. § Stop Redeploying
   § View Code Changes
   Instantly
   § Over 50,000 happy users
   Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under a
   
   Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
   

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6. Agenda
   § What is JRebel
   § Why use JRebel
   § How do I install it
   § Spring
   § Let’s see them in action
   § How do I get JRebel
   Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under a
   
   Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
   

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7. What is JRebel
   View Code Changes Instantly
   Unlike built-in JVM HotSwap, JRebel does not require debug mode,
   and supports class schema changes like adding methods or fields.
   JRebel supports:
   § Java classes
   § Resource files
   § 80+ Frameworks and their configurations
   Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under a
   
   Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
   

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8. Why use JRebel
   Developers on average spend one full work month per year
   waiting for redeploys
   With JRebel
   • View code changes instantly, code, save, refresh.
   • Finish sprints on time
   • Go home on time, don’t cut feature scope.
   • JRebel increases team velocity by up to 40% (backed by surveys and
   case studies).
   • Change anything
   • JRebel allows you to change your code and frameworks, regardless of
   your app’s complexity.
   Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under a
   
   Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
   

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9. JRebel compared to HotSwap
   Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under a
   
   Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
   

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10. What we support
    Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under a
    
    Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
    

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11. How do I install JRebel
    Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under a
    
    Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
    Let’s see!
    

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12. § Stop Redeploying
    § View Code Changes
    Instantly
    § Over 50,000 happy users
    § $1 per day ($365/year)
    § Save 5+ weeks per year
    § Go home and see your kids!
    Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under a
    
    Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
    

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13. Questions?
    Josh Long (⻰龙之春)
    @starbuxman
    jlong@gopivotal.com
    slideshare.net/joshlong
    github.com/joshlong
    http://spring.io
    @akoblentz
    @ZeroTurnaround
    adam@zeroturnaround.com
    zeroturnaround.com/jrebel
    slideshare.net/ZeroTurnaround
    Adam Koblentz
    &
    http://0t.ee/springboot1
    http://start.spring.io
    jrebel trial:
    spring boot:
    

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