Knowledge Hub
14 resources · 243 worked questions · 283 pages. Read online, search every section, or take the PDF with you.
Eight chapters of tight question-and-answer material on multi-tenancy, sites and organizations, Kaleo workflow, roles and permissions, the asset framework, personalization and staging — the concepts every Liferay architect is expected to explain without notes.
A practical reference to Liferay Objects with a worked Student–Course application, the generated REST API pattern, and clear guidance on when Service Builder is still the better tool.
Thirty-five questions that take you from Object fundamentals to advanced relationships, business logic, UI integration and deployment lifecycle — each answer short enough to say aloud and deep enough to defend.
Concise notes on what client extensions are, why they decouple custom code from Liferay’s OSGi runtime, and how frontend, configuration, microservice and batch types fit together.
A structured tour of all four client-extension classes, covering client-extension.yaml, Workspace layout, OAuth 2 integration, deployment, configuration as code, batch data and how to choose between them.
How to run services outside the Liferay JVM and still integrate them cleanly: the extension contract, OAuth 2 security, Docker-based deployment, and calls back into the Headless APIs.
Eight chapters and thirty-four questions covering extension types, custom elements, theming and styling, configuration as code, packaging and deployment, integration patterns, best practices and migration.
The complete picture of Liferay DXP clustering: load balancing, a shared database and document store, Elasticsearch, cluster communication, sessions, caches, failover, monitoring and production design principles.
Thirty-six questions on cluster link and cache replication, search-engine clustering, load balancing and sessions, schedulers and background jobs, containerised clusters, troubleshooting and best practices.
A concise architecture blueprint with infrastructure prerequisites, configuration snippets, JGroups and Tomcat session settings, a sequential startup protocol and a verification and failover checklist.
Design a seven-level approval workflow in Kaleo with scripted round-robin assignment, including state handling across nodes, concurrency, rejection paths, escalation, auditing and production hardening.
Everything needed to add enterprise single sign-on with OpenID Connect: OAuth 2.0 versus OIDC, providers and endpoints, the authentication flow, ID tokens, user mapping, logout and security considerations.
Customize how widgets render without touching Java: Application Display Templates, FreeMarker syntax and context, collections, localization, security and performance — and how templates compare with fragments and themes.
Fifty-six senior-level questions with detailed answers, architecture sketches and scenarios across OSGi, MVC, Service Builder, headless REST, Spring Boot, Hibernate, React, security, performance, CI/CD, upgrades, testing and leadership.
Where to start
Pick the sequence that matches your role. Each track is an ordered path through the library.
From extension basics to production-grade integrations.
Platform decisions, resilience, identity and process.
Model, automate and publish without heavy code.
Rehearse answers you can defend under pressure.
