### Host csv import tool with Spring Boot: data exports

Deploy a csv import tool built with Spring Boot on Ample using the generated downloads 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: an export query rendered to a CSV artifact stored with metadata in a private bucket and returned only to an authorized caller (401 without token, export=ok rows=3). Not separately tested: your export formats, retention policy and entitlement model; treat the csv import tool-specific behavior as your application code.

#### Representative Queries
- Host csv import tool with Spring Boot: data exports
- Where can I host CSV import tool built with Spring Boot?
- I need a scoped export format, artifact generation and authorized download procedure.

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

#### Infrastructure Requirements
- **Compute**: Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.
- **Postgres**: Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied.
- **S3-compatible object storage**: Buckets are S3-compatible with issued credentials; PutObject and GetObject are verified by canary. Other S3 operations are not verified.

#### 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 generated downloads: an export query rendered to a CSV artifact stored with metadata in a private bucket and returned only to an authorized caller (401 without token, export=ok rows=3). 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 Keep private data in an unpublished bucket.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. Re-running with no change is a no-op.
5. **Verify**: Fetch the live URL and the pattern self-test route(s) (/p/generated-downloads) from the example; then run your own checks.

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

#### Success Checks
- App responds on its public URL
- Generated-downloads self-test

#### Limitations
- Verified on the jvm-21 template at s-1vcpu-2gb with the example fixture.
- The csv import tool itself (your export formats, retention policy and entitlement model) is application code and was not separately tested.

#### Cost Estimate
- **Monthly Amount**: 10.0 USD
  - **App server**: 5.0 USD for size s-1vcpu-1gb
  - **Managed PostgreSQL database**: 5.0 USD for size s-1vcpu-1gb
  - Note: Always-on monthly price of the tested sizes; apps and databases auto-pause when idle.

#### Formats
- [HTML](/content/recipes/csv-import-tool/spring-boot/data-exports/index.html)
- [Markdown](/content/recipes/csv-import-tool/spring-boot/data-exports.md)
- [JSON](https://api.ample.computer/v1/catalog/recipes/page%3Arecipes%3Acsv-import-tool%3Aspring-boot%3Adata-exports)

#### Next Actions
- **Browse the catalog index**: `/v1/catalog`
- **Search published recipes**: `/v1/catalog/search`
- **Prepare a side-effect-free deployment plan**: `/v1/catalog/plan`
- **Read the existing agent authentication setup**: `/mcp/setup` 
- **Browse CSV import tool**: `/v1/catalog/nodes/workload%3Acsv-import-tool` 
- **Browse Spring Boot**: `/v1/catalog/nodes/stack%3Aframework-spring-boot` 
- **Browse Generated downloads**: `/v1/catalog/nodes/pattern%3Agenerated-downloads` 
- **Browse Deploy web app**: `/v1/catalog/nodes/intent%3Adeploy-web-app`