57 lines
1.9 KiB
Python
57 lines
1.9 KiB
Python
"""ADK Postgres Session Service for GCP Solution Architecture Agent.
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Uses google.adk.sessions.SessionService backed by external PostgreSQL database.
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"""
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import logging
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import uuid
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from typing import Any, Dict, Optional
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from app.adk.compat import Session, SessionService
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from app.database import get_db_manager
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logger = logging.getLogger(__name__)
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class PostgresSessionService(SessionService):
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"""ADK Session Service persisting state to PostgreSQL."""
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def __init__(self) -> None:
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self.db_manager = get_db_manager()
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def create_session(self, agent_name: str, session_id: Optional[str] = None) -> Session:
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"""Create a new session record in PostgreSQL database."""
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sid = session_id or str(uuid.uuid4())
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session = Session(session_id=sid, agent_name=agent_name, state={})
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self.db_manager.save_session(
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session_id=sid,
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agent_name=agent_name,
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state_data=session.state,
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metadata={"created_via": "PostgresSessionService"},
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)
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logger.info("Created ADK session %s in PostgreSQL database.", sid)
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return session
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def get_session(self, session_id: str) -> Optional[Session]:
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"""Fetch session state from PostgreSQL database."""
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sess_data = self.db_manager.get_session(session_id)
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if not sess_data:
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return None
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return Session(
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session_id=sess_data["session_id"],
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agent_name=sess_data["agent_name"],
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state=sess_data.get("state_data", {}),
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)
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def save_session(self, session: Session) -> bool:
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"""Update session state in PostgreSQL database."""
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success = self.db_manager.save_session(
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session_id=session.session_id,
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agent_name=session.agent_name,
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state_data=session.state,
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)
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if success:
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logger.info("Updated ADK session %s in PostgreSQL database.", session.session_id)
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return success
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