## Host Admin Dashboard with Spring Boot: Application Activity History

### Summary
Deploy an admin dashboard built with Spring Boot on Ample using the transactional workflows pattern. This setup utilizes an isolated microVM behind a public HTTPS URL, with a managed PostgreSQL 16 database auto-provisioned and injected as DATABASE_URL. It has been verified on Spring Boot: an optimistic version check and an event row is written in the same transaction, a stale update rejected, and a history query over the application-owned events.

### Representative Queries
- Host admin dashboard with Spring Boot: application activity history
- Where can I host Admin dashboard built with Spring Boot?
- I need an application-owned event schema and tested history queries; not native platform audit logs.

### Resource Requirements
- **Compute**
- **Postgres**

### Infrastructure Requirements
- **Compute**: Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request.
- **Postgres**: Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database.

### Framework
Spring Boot

### Workload
Admin dashboard

### Release Status
Published

### Support Status
Verified

### Execution Status
Ready

### Prerequisites
- A Spring Boot project that builds and starts with documented commands producing one application jar.
- A PostgreSQL driver reading DATABASE_URL at runtime.
- An Ample account token with necessary permissions.

### Tested Configuration
- **Template**: jvm-21
- **Runtime**: java
- **Size**: s-1vcpu-2gb
- **Build**: `./mvnw -q -DskipTests package`
- **Start**: `java -jar $(ls target/*.jar | grep -v -- '-plain' | head -n 1)`

### Workflow Steps
1. **Build and Start**: `./mvnw -q -DskipTests package`
2. **Implement the Pattern on PostgreSQL**: Copy the optimistic version check and event row handling into your schema.
3. **Deploy**: Execute deployment using `ample deploy . --name --public`.
4. **Verify**: Fetch the live URL and test routes.

### Examples
- **Spring Boot Pattern Fixture**: Multi-pattern Spring Boot app; details in the source reference.

### Success Checks
- Ensure app responds on its public URL.
- Verify with transactional-workflows self-test.

### Limitations
- Verified only on specified template and size; other configurations may not be supported.
- The admin dashboard's specific behavior is treated as application code.

### Cost Estimate
- **Currency**: USD
- **Monthly Amount**: 10.0
- **Components**:
  - App server: s-1vcpu-1gb, $5.0
  - Managed PostgreSQL database: s-1vcpu-1gb, $5.0

### Evidence Summary
- **Canary Run**: Spring Boot pattern fixture checks validated.

### Next Actions
- Browse the catalog index.
- Search published recipes by intent, stack, and constraints.
- Prepare a side-effect-free deployment plan for an authorized project.