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Flash5/flash-extensions/flash-ext-view-jte/docs/architecture.md
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# Architecture
`flash-ext-view-jte` has two layers:
1. **Boot-time**
- `JteExtension` installs runtime + annotation processor.
- `JteTargetResolver` validates handlers and resolves `@Template`.
- Resolved targets are cached per handler class.
2. **Request-time**
- Handler builds local `ViewModel`.
- Runtime injects globals under reserved `global` namespace and merges local model.
- jte renders template into `StringOutput`.
3. **Static assets (optional, enabled by default)**
- Extension mounts wildcard routes under `staticPrefix` (default `/static/**`).
- Assets are served from classpath `/static/**`.
- Uses Flash `Response.body(...)` for small payloads and `Response.stream(...)` for large payloads.
- Supports ETag/304, gzip precompressed assets, MIME auto-resolution, and byte ranges.
## Handler Contract
- Must extend `JteHandler`.
- Must have route annotation (`@Route`, `@GET`, `@POST`, ...).
- Must declare exactly one view annotation: `@Template`.
Invalid configurations fail fast at startup.
## Defaults
- `templateRoot`: `/templates`
- `contentType`: `gg.jte.ContentType.Html`
- `developmentMode`: `Flash.DEV`
- `usePrecompiled`: derived from `!developmentMode` unless explicitly set
- `binaryStaticContent`: `false`
- `serveStatics`: `true`
- `staticPrefix`: `/static`
- `largeFileThresholdBytes`: `65536`
- static CORS: disabled (`false`)