Multiplatform Java application developmentNikita Salnikov-Tarnovski@iNikemhttp://plumbr.eu

Monday, October 21, 13

• Estonian startup trying to solve performance problems

• We started with memory leaks and solved them :)

• Ongoing effort, more problems to be solved

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Plumbr company

Monday, October 21, 13

• Java agent, runs alongside your application

• Uses Instrumentation API to hook into your code

• Native counterpart in platform-specific C code

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Plumbr software

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• To support java 5, 6, 7, JRockit, IBM JVM

• To support Windows, Linux, Mac OS X, Solaris Sparc and Solaris x86

• Not the last versions only

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“External” Goals

Monday, October 21, 13

• Build infrastructure as automated as possible

• Automatic tests on all platforms

• Release maintenance vs future development

• Traceability

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“Inner” goals

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Forward Traceability

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Backward traceability

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1.2 1.3 2.0 2.1 2.1.3

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Our team

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One

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Two

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Virtually three

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Mini hero

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Ancient legend

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Mastermind

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• Small subproject in C, rarely updated

• Lives in BitBucket as well

• Jenkins builds it with make

• Then publishes to Artifactory

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Native part

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• We build native part on AWS instance

• But we need old enough libc

• Have to use chroot with older system

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The problem of libc

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• Jenkins builds whole project on every commit

• Runs fast tests, collects metrics

• Pushes all artifacts to ‘builds’ repo

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CI

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• All those environments are put into Jenkins pipeline

• Runs every night

• Downloads given version from ‘builds’ repo and runs full acceptance tests suite

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Test pipeline

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• End-to-end test

• Leaking application is started and used

• Plumbr’s report is then verified

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Acceptance test

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• If whole pipeline succeeds, pushes that tested version to ‘nightly’ repo

• Updates downloadable version on our site

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Nightly

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• Another job in Jenkins

• Lets you select version number from JIRA

• Pushes ready version from ‘nightly’ to ‘release’ repo

• Tags Mercurial revision corresponding to that version with JIRA version tag

• Updates Plumbr download page with new version

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Release

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Live fix

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• WORA does not mean T(est)ORA

• There are more to Java than Hotspot

• We are blessed by not writing C

• Tools matter a lot

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Conclusion

Monday, October 21, 13

Solving performance problems is hard. We don’t think it needs to be.

@iNIkem/@JavaPlumbrplumbr.eu

Monday, October 21, 13