1. Multiplatform Java
application development
Nikita Salnikov-Tarnovski
@iNikem
http://plumbr.eu
Monday, October 21, 13

2. Plumbr company
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Estonian startup trying to solve performance problems
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We started with memory leaks and solved them :)
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Ongoing effort, more problems to be solved
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Monday, October 21, 13

3. Plumbr software
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Java agent, runs alongside your application
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Uses Instrumentation API to hook into your code
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Native counterpart in platform-specific C code
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Monday, October 21, 13

4. “External” Goals
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To support java 5, 6, 7, JRockit, IBM JVM
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To support Windows, Linux, Mac OS X, Solaris Sparc and
Solaris x86
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Not the last versions only
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Monday, October 21, 13

5. “Inner” goals
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Build infrastructure as automated as possible
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Automatic tests on all platforms
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Release maintenance vs future development
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Traceability
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Monday, October 21, 13

6. Forward Traceability
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Monday, October 21, 13

7. Backward traceability
1.2
1.3
2.0
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2.1
2.1.3

8. Our team
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Monday, October 21, 13

9. One
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10. Two
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11. Virtually three
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12. Mini hero
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13. Ancient legend
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14. Mastermind
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15. Native part
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Small subproject in C, rarely updated
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Lives in BitBucket as well
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Jenkins builds it with make
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Then publishes to Artifactory
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Monday, October 21, 13

16. The problem of libc
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We build native part on AWS instance
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But we need old enough libc
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Have to use chroot with older system
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Monday, October 21, 13

17. CI
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Jenkins builds whole project on every commit
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Runs fast tests, collects metrics
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Pushes all artifacts to ‘builds’ repo
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Monday, October 21, 13

18. Test pipeline
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All those environments are put into Jenkins pipeline
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Runs every night
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Downloads given version from ‘builds’ repo and runs full
acceptance tests suite
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Monday, October 21, 13

19. Acceptance test
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End-to-end test
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Leaking application is started and used
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Plumbr’s report is then verified
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20. Nightly
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If whole pipeline succeeds, pushes that tested version to
‘nightly’ repo
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Updates downloadable version on our site
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Monday, October 21, 13

21. Release
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Another job in Jenkins
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Lets you select version number from JIRA
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Pushes ready version from ‘nightly’ to ‘release’ repo
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Tags Mercurial revision corresponding to that version with
JIRA version tag
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Updates Plumbr download page with new version
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Monday, October 21, 13

22. Live fix
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Monday, October 21, 13

23. Conclusion
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WORA does not mean T(est)ORA
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There are more to Java than Hotspot
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We are blessed by not writing C
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Tools matter a lot
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Monday, October 21, 13

24. Solving performance problems is hard.
We don’t think it needs to be.
@iNIkem/@JavaPlumbr
plumbr.eu
Monday, October 21, 13