A lightweight job-processing microservice that accepts text-processing jobs via REST, processes them asynchronously (simulated heavy work), persists state/results in SQLite, and exposes endpoints to submit and query jobs.

• ⁠POST /jobs to submit a job
• ⁠GET /jobs/{job_id} to fetch status and result
• ⁠Background processing using Tokio tasks
• ⁠SQLite persistence with connection pooling via ⁠ sqlx ⁠
• ⁠Tests: unit and integration

• ⁠Rust toolchain (1.62+ recommended)
• ⁠⁠ cargo ⁠ available

Optional environment variables

• ⁠⁠ DATABASE_URL ⁠ - SQLite connection string. Defaults to ⁠ sqlite://jobs.db ⁠.
• ⁠⁠ BIND_ADDR ⁠ - server bind address. Defaults to ⁠ 127.0.0.1:8080 ⁠.

cargo build --release

run with default SQLite file 'jobs.db' in the working directory

cargo run --release

or set a different database or bind address

DATABASE_URL="sqlite://./my_jobs.db" BIND_ADDR="0.0.0.0:8080" cargo run --release

On first run the service will create the jobs table if it does not exist.

POST /jobs

Request JSON

{ "input": "some text" }

Response JSON

{ "job_id": "<uuid>" }

Behavior

Inserts a new row with status = "pending"

Spawns a background task that updates status to running, sleeps 5 seconds, computes reverse(input), and sets status to completed with the result.

Example curl

curl -s -X POST http://127.0.0.1:8080/jobs
-H "Content-Type: application/json"
-d '{"input": "hello world"}'

GET /jobs/{job_id}

Response JSON

{
  "job_id": "<uuid>",
  "status": "pending|running|completed|failed",
  "result": "<string|null>",
  "created_at": "<RFC3339>",
  "updated_at": "<RFC3339>"
}

Example curl

curl -s http://127.0.0.1:8080/jobs/<job_id> | jq