# Host project tracker with Spring Boot: private attachments

Deploy a project tracker built with Spring Boot on Ample using the private document library pattern. Compute runs the app in an isolated microVM behind a public HTTPS URL, a managed PostgreSQL 16 database is auto-provisioned and injected as DATABASE_URL, a private S3-compatible bucket holds objects with credentials delivered as encrypted environment variables. Verified on Spring Boot: a role-to-document access model with negative tests (401 without identity, 403 for the wrong role) and a private-bucket round-trip for the allowed role (private=ok). Not separately tested: your identity integration and role assignments; treat the project tracker-specific behavior as your application code.

## Summary

- **Framework:** Spring Boot  
- **Workload:** Project tracker  
- **Release Status:** published  
- **Support Status:** verified  
- **Execution Status:** ready

## Representative Queries
1. Host project tracker with Spring Boot: private attachments  
2. Where can I host Project tracker built with Spring Boot?  
3. I need attachment metadata, access checks and a tested private object access path.

## Prerequisites
- A Spring Boot project that builds and starts with the documented commands (`./mvnw -q -DskipTests package` or the Gradle wrapper) producing one application jar, then `java -jar` on the jvm-21 template (Temurin JDK 21) with `server.port` read from `PORT`.  
- A PostgreSQL driver reading `DATABASE_URL` at runtime (auto-provisioned when omitted, or supplied with `--env`)  
- A bucket from `ample bucket create` with its credentials passed as encrypted `S3_*` environment variables  
- An Ample account token with `servers:write`, `databases:read`, `buckets:read`

## Resource Requirements
- `primitive:compute`  
- `primitive:postgres`  
- `primitive:s3-compatible-object-storage`

## Workflow Steps
1. **Build and start**  
   `./mvnw -q -DskipTests package` (or the Gradle wrapper) producing one application jar, then `java -jar` on the jvm-21 template (Temurin JDK 21) with `server.port` read from `PORT`. The server must bind 0.0.0.0 on PORT.
2. **Implement the pattern on PostgreSQL**  
   The fixture's module implements private document library: a role-to-document access model with negative tests (401 without identity, 403 for the wrong role) and a private-bucket round-trip for the allowed role (private=ok). Copy the approach into your schema; keep migrations idempotent and run them with `--release-command`.
3. **Wire object storage**  
   Create the bucket(s), then pass endpoint, region, bucket and keys as `--env` values. Use path-style addressing. Keep private data in an unpublished bucket.
4. **Deploy**  
   Run the synchronous deploy once and read the result (exit 0 live, 1 failed, 2 blocked). Re-running with no change is a no-op.  
   ```  
   ample deploy . --name  --public --env S3_ENDPOINT=... --env S3_REGION=... --env S3_BUCKET=... --env S3_ACCESS_KEY_ID=... --env S3_SECRET_ACCESS_KEY=...  
   ```
5. **Verify**  
   Fetch the live URL and the pattern self-test route(s) (`/p/private-document-library`) from the example; then run your own checks. On failure read `ample logs  --kind build` then `--kind runtime`.  
   ```  
   ample logs  --kind build  
   ```

## Success Checks
- App responds on its public URL  
- Private-document-library self-test

## Limitations
1. Verified on the jvm-21 template at s-1vcpu-2gb with the example fixture; other sizes, templates and Spring Boot major versions are not verified.
2. The project tracker itself (your identity integration and role assignments) is application code and was not separately tested.
3. Region, compliance attestations and request-duration limits are unknown and not claimed.

## Examples
- **Spring Boot pattern fixture**: Multi-pattern Spring Boot app whose private document library module was checked live; the module is under `tests/deploy-canaries/_pattern-modules`.

## Evidence Summary
- Spring Boot pattern fixture deployed on Ample with checks passed for private-document-library and configuration-secrets.