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import json
import logging
from typing import Any, Dict, List, Optional
from uuid import uuid4
from pydantic import PrivateAttr
from sqlalchemy import Column, DateTime, String, create_engine, func
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from obsei.misc.utils import obj_to_json
from obsei.workflow.base_store import BaseStore
from obsei.workflow.workflow import WorkflowState, WorkflowConfig, Workflow
logger = logging.getLogger(__name__)
Base = declarative_base() # type: Any
class ORMBase(Base): # type: ignore
__abstract__ = True
id = Column(String(100), default=lambda: str(uuid4()), primary_key=True)
created = Column(DateTime, server_default=func.now())
updated = Column(DateTime, server_default=func.now(), server_onupdate=func.now())
class WorkflowTable(ORMBase):
__tablename__ = "workflow"
config = Column(String(2000), nullable=False)
source_state = Column(String(500), nullable=True)
sink_state = Column(String(500), nullable=True)
analyzer_state = Column(String(500), nullable=True)
class WorkflowStore(BaseStore):
_session: sessionmaker = PrivateAttr()
def __init__(self, url: str = "sqlite:///obsei.db", **data: Any):
super().__init__(**data)
engine = create_engine(url)
ORMBase.metadata.create_all(engine)
local_session = sessionmaker(bind=engine)
self._session = local_session()
def get(self, identifier: str) -> Optional[Workflow]:
row = self._session.query(WorkflowTable).filter_by(id=identifier).all()
return (
None
if row is None or len(row) == 0
else self._convert_sql_row_to_workflow_data(row[0])
)
def get_all(self) -> List[Workflow]:
rows = self._session.query(WorkflowTable).all()
return [self._convert_sql_row_to_workflow_data(row) for row in rows]
def get_workflow_state(self, identifier: str) -> Optional[WorkflowState]:
row = (
self._session.query(
WorkflowTable.source_state,
WorkflowTable.analyzer_state,
WorkflowTable.sink_state,
)
.filter(id=identifier)
.all()
)
return (
None
if row is None or len(row) == 0
else self._convert_sql_row_to_workflow_state(row[0])
)
def get_source_state(self, identifier: str) -> Optional[Dict[str, Any]]:
row = (
self._session.query(WorkflowTable.source_state)
.filter(WorkflowTable.id == identifier)
.all()
)
return None if row[0].source_state is None else json.loads(row[0].source_state)
def get_sink_state(self, identifier: str) -> Optional[Dict[str, Any]]:
row = self._session.query(WorkflowTable.sink_state).filter(id=identifier).all()
return None if row[0].sink_state is None else json.loads(row[0].sink_state)
def get_analyzer_state(self, identifier: str) -> Optional[Dict[str, Any]]:
row = self._session.query(WorkflowTable.analyzer_state).filter(id=identifier).all()
return (
None if row[0].analyzer_state is None else json.loads(row[0].analyzer_state)
)
def add_workflow(self, workflow: Workflow) -> None:
self._session.add(
WorkflowTable(
id=workflow.id,
config=obj_to_json(workflow.config),
source_state=obj_to_json(workflow.states.source_state),
sink_state=obj_to_json(workflow.states.sink_state),
analyzer_state=obj_to_json(workflow.states.analyzer_state),
)
)
self._commit_transaction()
def update_workflow(self, workflow: Workflow) -> None:
self._session.query(WorkflowTable).filter_by(id=workflow.id).update(
{
WorkflowTable.config: obj_to_json(workflow.config),
WorkflowTable.source_state: obj_to_json(workflow.states.source_state),
WorkflowTable.sink_state: obj_to_json(workflow.states.sink_state),
WorkflowTable.analyzer_state: obj_to_json(
workflow.states.analyzer_state
),
},
synchronize_session=False,
)
self._commit_transaction()
def update_workflow_state(self, workflow_id: str, workflow_state: WorkflowState) -> None:
self._session.query(WorkflowTable).filter_by(id=workflow_id).update(
{
WorkflowTable.source_state: obj_to_json(workflow_state.source_state),
WorkflowTable.sink_state: obj_to_json(workflow_state.sink_state),
WorkflowTable.analyzer_state: obj_to_json(
workflow_state.analyzer_state
),
},
synchronize_session=False,
)
self._commit_transaction()
def update_source_state(self, workflow_id: str, state: Dict[str, Any]) -> None:
self._session.query(WorkflowTable).filter_by(id=workflow_id).update(
{WorkflowTable.source_state: obj_to_json(state)}, synchronize_session=False
)
self._commit_transaction()
def update_sink_state(self, workflow_id: str, state: Dict[str, Any]) -> None:
self._session.query(WorkflowTable).filter_by(id=workflow_id).update(
{WorkflowTable.sink_state: obj_to_json(state)}, synchronize_session=False
)
self._commit_transaction()
def update_analyzer_state(self, workflow_id: str, state: Dict[str, Any]) -> None:
self._session.query(WorkflowTable).filter_by(id=workflow_id).update(
{WorkflowTable.analyzer_state: obj_to_json(state)},
synchronize_session=False,
)
self._commit_transaction()
def delete_workflow(self, id: str) -> None:
self._session.query(WorkflowTable).filter_by(id=id).delete()
self._commit_transaction()
def _commit_transaction(self) -> Any:
try:
self._session.commit()
except Exception as ex:
logger.error(f"Transaction rollback: {ex.__cause__}")
# Rollback is important here otherwise self.session will be in inconsistent state and next call will fail
self._session.rollback()
raise ex
@staticmethod
def _convert_sql_row_to_workflow_state(row: Any) -> Optional[WorkflowState]:
if row is None:
return None
source_state_dict = (
None if row.source_state is None else json.loads(row.source_state)
)
sink_state_dict = None if row.sink_state is None else json.loads(row.sink_state)
analyzer_state_dict = (
None if row.analyzer_state is None else json.loads(row.analyzer_state)
)
workflow_states: Optional[WorkflowState] = None
if source_state_dict or sink_state_dict or analyzer_state_dict:
workflow_states = WorkflowState(
source_state=source_state_dict,
sink_state=sink_state_dict,
analyzer_state=analyzer_state_dict,
)
return workflow_states
@staticmethod
def _convert_sql_row_to_workflow_data(row: Any) -> Workflow:
config_dict = json.loads(row.config)
workflow = Workflow(
id=row.id,
config=WorkflowConfig(**config_dict),
states=WorkflowStore._convert_sql_row_to_workflow_state(row),
)
return workflow
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