This release is a pre-release and may not be stable for production use.
stablemates-workhorse
The Python clients, worker runtimes, and dashboard host for the Workhorse PostgreSQL durable execution protocol.
Public beta: Workhorse is usable for evaluation and early production adoption, but 0.x minor releases may break compatibility, including the schema. There is no upgrade path between 0.x releases; ordered migrations begin at 1.0.0.
Install
pip install stablemates-workhorse
Install the schema during deployment with the TypeScript CLI. Runtime processes should verify compatibility instead of attempting schema changes.
Requires Python 3.12 through 3.14 and PostgreSQL 15 through 18.
Run one job
from __future__ import annotations
import os
import psycopg
from workhorse import Queue, Worker
database_url = os.environ["DATABASE_URL"]
with psycopg.connect(database_url) as application_connection:
job_id = Queue(application_connection).enqueue("email.welcome", {"to": "ada@example.com"})
application_connection.commit()
with psycopg.connect(database_url, autocommit=True) as worker_connection:
worker = Worker(worker_connection).handle(
"email.welcome",
lambda payload, _context: {"deliveredTo": payload["to"]},
)
assert worker.run_once() is True # Production worker processes call run().
print(job_id)
Handlers receive at-least-once delivery. Use stable provider idempotency keys around external effects; named checkpoints prevent completed application stages from running after a later restart.
Package boundary
This distribution provides synchronous Psycopg and asynchronous Psycopg or asyncpg clients and workers. Application clients use caller-owned connections and transactions. Workers use dedicated connections for claims and lifecycle calls. The package never installs or migrates the shared PostgreSQL schema.
Next
- Follow the quickstart and deploy worker processes.
- Read the API reference and compatibility policy.
- Use the operations guide for telemetry, health, and maintenance.
- Browse the repository or report a problem in GitHub issues.
License
Apache-2.0. See LICENSE and NOTICE in the package.
1 maintainer
Metadata
1 maintainer
Release files for stablemates-workhorse 0.1.0b3
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Total release size: 1.0 MB
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