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feat(storage): add CitusStorageBackend for distributed PostgreSQL #238

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Merged
yasha-dev1 merged 3 commits into from
Mar 1, 2026
Merged

feat(storage): add CitusStorageBackend for distributed PostgreSQL #238

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08f3fbd
feat(storage): add CitusStorageBackend for distributed PostgreSQL
yasha-dev1 Feb 28, 2026
78208da
fix(storage): sort imports in test_citus_storage to satisfy ruff I001
yasha-dev1 Mar 1, 2026
ffcdf02
style(storage): apply ruff format to citus.py
yasha-dev1 Mar 1, 2026
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6 changes: 3 additions & 3 deletions pyworkflow/config.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@
... )

Environment Variables:
PYWORKFLOW_STORAGE_TYPE: Storage backend type (file, memory, sqlite, postgres, mysql)
PYWORKFLOW_STORAGE_TYPE: Storage backend type (file, memory, sqlite, postgres, mysql, citus)
PYWORKFLOW_STORAGE_PATH: Path for file/sqlite backends
PYWORKFLOW_POSTGRES_HOST: PostgreSQL host
PYWORKFLOW_POSTGRES_PORT: PostgreSQL port
Expand Down Expand Up @@ -58,9 +58,9 @@ def _load_env_storage_config() -> dict[str, Any] | None:

storage_type = storage_type.lower()

if storage_type == "postgres":
if storage_type in ("postgres", "citus"):
return {
"type": "postgres",
"type": storage_type,
"host": os.getenv("PYWORKFLOW_POSTGRES_HOST", "localhost"),
"port": int(os.getenv("PYWORKFLOW_POSTGRES_PORT", "5432")),
"user": os.getenv("PYWORKFLOW_POSTGRES_USER", "pyworkflow"),
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7 changes: 7 additions & 0 deletions pyworkflow/storage/__init__.py
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Expand Up @@ -47,6 +47,12 @@
except ImportError:
MySQLStorageBackend = None # type: ignore

# Citus distributed PostgreSQL backend - optional import (requires asyncpg + Citus extension)
try:
from pyworkflow.storage.citus import CitusStorageBackend
except ImportError:
CitusStorageBackend = None # type: ignore

__all__ = [
"StorageBackend",
"FileStorageBackend",
Expand All @@ -56,6 +62,7 @@
"DynamoDBStorageBackend",
"CassandraStorageBackend",
"MySQLStorageBackend",
"CitusStorageBackend",
"WorkflowRun",
"StepExecution",
"Hook",
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