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Provisioning & Migration with p2: Case study - The Good, the Bad and the Ugly

Provisioning & Migration with p2: Case study - The Good, the Bad and the Ugly. Christian Bourgeois @bourgeois_c. Some Context on Previous Product Version. Based on Eclipse 3.4 Too much time to deliver a simple update Migration would leave system in inconsistent state.

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Provisioning & Migration with p2: Case study - The Good, the Bad and the Ugly

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  1. Provisioning & Migration with p2: Case study - The Good, the Bad and the Ugly Christian Bourgeois @bourgeois_c

  2. Some Context on Previous Product Version • Based on Eclipse 3.4 • Too much time to deliver a simple update • Migration would leave system in inconsistent state

  3. How can we update a software component and migrate it’s configuration data while having a stable system in case of failure?

  4. Demonstration

  5. Provisioning UI importorg.eclipse.equinox.internal.p2.ui.ProvUI; importorg.eclipse.equinox.internal.p2.ui.ProvUIProvisioningListener; importorg.eclipse.equinox.internal.p2.ui.dialogs.AddRepositoryDialog; importorg.eclipse.equinox.internal.provisional.p2.repository.RepositoryEvent;

  6. Business ModelArtifacts Layout • server.feature • info.feature • server.bundle • common.bundle • config.feature • client.feature • info.feature • client.bundle • common.bundle • client.bundle.nls

  7. Business Modelinfo.feature – p2.inf properties.1.name = bsm.adaptor properties.1.value = true properties.2.name = adaptor.name properties.2.value = ZExampleAdaptor properties.3.name = client.feature.name properties.3.value = zzz.compuware.example.adaptor.client.feature properties.4.name = server.feature.name properties.4.value = zzz.compuware.example.adaptor.server.feature properties.5.name = adaptor.id properties.5.value = ZExampleAdaptor properties.6.name = adaptor.version properties.6.value = 1.0.0 properties.7.name = company.id properties.7.value = CPWR properties.8.name = domains.ids properties.8.value = APM

  8. Migrations… How to integrate them with p2? public abstract class org.eclipse.equinox.p2.engine.spi.ProvisioningAction { … public abstract IStatusexecute(Map<String, Object> parameters); public abstract IStatusundo(Map<String, Object> parameters); … }

  9. Remote Provisioning Server Client Create Plan Uninstall Create Plan Execute Plan Save timestamp Install Create Plan Migrate Execute Plan timestamp Execute Plan

  10. p2 Touchpoint Actions instructions.configure=markStarted(started:true); instructions.configure=copy(source:a, target:b,overwrite:true); instructions.configure=setProgramProperty(propName:key, propValue:value); instructions.configure=addJvmArg(jvmArg:-XX:+UnlockDiagnosticVMOptions); They are executed in the “builder”!

  11. Custom p2 Touchpoint Actions instructions.configure=…adaptors.p2.engine.touchpoint.migrate(); instructions.unconfigure=…adaptors.p2.engine.touchpoint.saveConfigurations(); • Executes business logic • Must have knowledge of their runtime

  12. public IStatusexecute(Map<String, Object> parameters) { booleanisServer = RuntimeInfo.isServer(); if (!isServer) { return Status.OK_STATUS; } … IInstallableUnitinfoInstallableUnit = this.getInfoInstallableUnit(iu, repositoryManager, progressMonitor); String adaptorID = this.getAdaptorID(infoInstallableUnit); Version adaptorVersion = this.getAdaptorVersion(infoInstallableUnit); MigrationManager manager = this.getMigrationManager(); MigrationStatusmigrationStatus = manager.migrate(adaptorID, adaptorVersion); IStatus status = EclipseStatusFactory.createStatus(migrationStatus); return status; } public IStatusundo(Map<String, Object> parameters) { … MigrationManager manager = this.getMigrationManager(); manager.revert(adaptorID, adaptorVersion); }

  13. Ok… But now I get a “No action found” message?

  14. p2 Meta-Requirements • Provisions the meta-requirements in the builder com.compuware.vantage.vsm.adaptors.p2.engine.touchpoint.feature provides.0.namespace=com.compuware.vantage.vsm.adaptors.p2 provides.0.name=touchpoints provides.0.version=1.1 com.compuware.vantage.vsm.adaptors.p2.prerequisite.feature metaRequirements.0.namespace=com.compuware.vantage.vsm.adaptors.p2 metaRequirements.0.name=touchpoints metaRequirements.0.range=1.1

  15. p2 Meta-RequirementsBeware! • Tycho Bugzilla 351487 • tycho-p2-director-plugin ignores meta-requirements • *.target in IDE

  16. Conclusion • p2 is easy to use (when you know the basics) • p2 API is becoming more high level • Must be aware of the “tricks” and pitfalls

  17. Feedback is always appreciated Christian Bourgeois @bourgeois_c

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