Resource shell extension points

[hpehl]

Overview

The ResourceShell provides a composable framework for CRUD operations on arbitrary WildFly management resources. The ModelBrowser is currently the most prominent consumer. While the generic UX works well for the vast majority of resources, some resources benefit from a more specialized UI.

This umbrella issue tracks all extension points for the resource shell. Each extension point is a separate sub-issue that can be designed and implemented independently.

Design Decisions

1. Separate registries per concern — each extension point has its own registry rather than one monolithic ResourceExtension interface. This keeps concerns decoupled and allows incremental adoption.
2. Registration key — extensions register against a combination of Environment (which provides operation mode, stability level, product version, etc.) and an AddressTemplate (which can contain wildcards). This allows extensions to be scoped by resource type and conditional on server capabilities.

Extension Points

• Extension point: custom tabs #329 — Custom tabs: contribute additional tabs to ResourceTabs or replace/remove default tabs
• Extension point: custom add-resource dialog #330 — Custom add-resource dialog: replace the generic add dialog with a resource-specific wizard
• Extension point: custom resource header #331 — Custom resource header: replace or augment the default header with resource-specific content
• Extension point: custom data view / form #332 — Custom data view / form: customize the Data tab's view and edit modes
• Extension point: custom resource list rendering #333 — Custom resource list rendering: customize how child resources are displayed in folder views
• Extension point: custom delete behavior #334 — Custom delete behavior: customize the delete confirmation and pre/post-delete actions
• Extension point: custom breadcrumb #335 — Custom breadcrumb: customize segment rendering or add breadcrumb actions

Current Architecture

The ResourceShell is a pure layout container that composes optional children:

ResourceShell
├── Sticky header group
│   ├── ResourceBreadcrumb (optional)
│   └── ResourceHeader (optional)
└── Content section
    ├── ResourceTabs (option A)
    │   ├── Data tab → ResourceData → Pipeline → ResourceView / ResourceForm
    │   ├── Attributes tab → AttributesTable
    │   ├── Operations tab → OperationsTable
    │   └── Capabilities tab → CapabilitiesTable
    └── ResourceList (option B)
        └── DataList of child resources

All intelligence lives in the composed children. The shell itself has no behavior and no data loading.