Surviving SOA Delivering (somewhat) continuously on a hostile planet @TomAkehurst
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!
Surviving SOA Delivering (somewhat) continuously on a hostile planet!
!@TomAkehurst
You can’t always get what you want…!
The OrgLarge, horizontally sliced programme
The OrgLarge, horizontally sliced programme !Fixed-price contracts (inflexibility)
The OrgLarge, horizontally sliced programme !Fixed-price contracts (inflexibility) !DevOps and testers in separate teams
The OrgLarge, horizontally sliced programme !Fixed-price contracts (inflexibility) !DevOps and testers in separate teams !Theory X (leading to endemic risk/change aversion)
The Process“Agile” but….
The Process“Agile” but…. !Lack of feedback and improvement mechanisms
The Process“Agile” but…. !Lack of feedback and improvement mechanisms !Enabling technical practices neglected
The Process“Agile” but…. !Lack of feedback and improvement mechanisms !Enabling technical practices neglected !Very infrequent live releases, tons of WIP
The Process“Agile” but…. !Lack of feedback and improvement mechanisms !Enabling technical practices neglected !Very infrequent live releases, tons of WIP !Long cycle times, but nobody seemed to notice
The TechnologyBig vendor SOA + BPM !Old skool J2EE containers !!
The TechnologyBig vendor SOA + BPM !Old skool J2EE containers !SOAP !
The TechnologyBig vendor SOA + BPM !Old skool J2EE containers !SOAP !Shoddy inherited codebase !!
Database
Database
ETL
Database
The SOAP Layer
ETL
Database
The SOAP Layer
The MoreSOAP Layer
ETL
Database
The SOAP Layer
The MoreSOAP Layer
ETL
Database
The SOAP Layer
The MoreSOAP Layer
ETL
Our thing
The PipelineNo pre-test integration environments !Very locked-down test environments !!!!
The PipelineNo pre-test integration environments !Very locked-down test environments !Separate test team per test environment - ReleaseTesting3 !!!
The PipelineNo pre-test integration environments !Very locked-down test environments !Separate test team per test environment - ReleaseTesting3
!Test automation team building vast Selenium suite !
ENERGIZED WORK / Metal Box Factory Unit 323 30 Great Guildford Street London SE1 0HS / www.energizedwork.com
!!!
Survival!!
What does (as) good (as we can manage) look like?
What does (as) good (as we can manage) look like?Keep our own cycle time down, but don’t locally optimise
What does (as) good (as we can manage) look like?Keep our own cycle time down, but don’t locally optimise !Minimise the risks we can control, manage those we can’t
What does (as) good (as we can manage) look like?Keep our own cycle time down, but don’t locally optimise !Minimise the risks we can control, manage those we can’t !Don’t compromise on quality (even if others are)
The BasicsTDD + ATDD !Trunk-based development !Build discipline !Small batches (commits, pushes, releases)
Service Mocking
Service MockingFast functional tests
Service MockingFast functional tests !Parallel development with service teams
Service MockingFast functional tests !Parallel development with service teams !Reduce need for a dev/int environment
Service MockingFast functional tests !Parallel development with service teams !Reduce need for a dev/int environment !Fault injection
Sham data
Sham dataHigh fidelity demos !Serendipitous bug discovery + better exploratory testing
Sham dataHigh fidelity demos !Serendipitous bug discovery + better exploratory testing !Generative-style tests
App JVM
App
Hermetic Testing
Test JVM
WireMock
SpockSham
Geb/Selenium
phantomjsGenerate SOAP stubs
SOAP
Templates
SOAP minus WSDL
SOAP minus WSDLgroovy-ws-lite - XML builders for SOAP messages, not generated source
SOAP minus WSDLgroovy-ws-lite - XML builders for SOAP messages, not generated source !Tolerant reader
SOAP minus WSDLgroovy-ws-lite - XML builders for SOAP messages, not generated source !Tolerant reader !Reduced need for synchronised releases
SOAP minus WSDLgroovy-ws-lite - XML builders for SOAP messages, not generated source !Tolerant reader !Reduced need for synchronised releases !Use WSDL for unit tests (with off switch)
Telemetry
TelemetrySOAP request/response history
TelemetrySOAP request/response history !Metrics
TelemetrySOAP request/response history !Metrics !Service check
TelemetrySOAP request/response history !Metrics !Service check !Scenario (integration) tests
Exploratory Testing as Peer ReviewSneaky tunnel to the test environment !Guided by common gotchas list !Reduce pressure on bottleneck - the testers
Hermetic Demo EnvironmentLaptop install via USB key !Sham data for realism !Early feedback
Did it work?We didn’t work weekends (everyone else did)
Did it work?We didn’t work weekends (everyone else did) !Able to react quickly to late, complex changes
Did it work?We didn’t work weekends (everyone else did) !Able to react quickly to late, complex changes !Defect rate so low that business sponsors thought there was a reporting problem
Did it work?Integration bugs due to bad assumptions about semantics persisted !!!
Did it work?Integration bugs due to bad assumptions about semantics persisted !Manual testing remained a bottleneck
Did it work?Integration bugs due to bad assumptions about semantics persisted !Manual testing remained a bottleneck !Failed to significantly influence practices outside our team
ENERGIZED WORK / Metal Box Factory Unit 323 30 Great Guildford Street London SE1 0HS / www.energizedwork.com
!!!
Next time we’ll…!!
…shun container securityTight coupling !Frequent nasty surprises on deployment to test environments !Hard to mock effectively for testing
…keep the build time downHeavy-heavy-heavyweight framework (Grails) !Selenium overuse !Build breakage frequency increased with duration !Temptation to skimp on new test cases !Adding concurrency afterwards is hard
…choose a better optimised tech stack
Wire protocol supporting loose coupling and evolution !Small framework - fast startup, small footprint under no load !Embedded container - fast, simple deployments, no compatibility hassles !Minimise need for browser-driven tests
If you only take away one thing
Don’t settle for the lowest common denominator - CD can be practiced in hostile environments, and it’s worth it!
ENERGIZED WORK / Metal Box Factory Unit 323 30 Great Guildford Street London SE1 0HS / www.energizedwork.com
!!!
Ta!!!!!
@TomAkehurst!https://github.com/tomakehurst
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