File size: 5,652 Bytes
92c4ae6 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 | import uuid
import logging
from datetime import datetime, timezone
from typing import List, Dict, Any, Optional
from sqlalchemy.orm import Session
from core.models import DelegationChain, ChainLink, AgentRegistry
logger = logging.getLogger(__name__)
class AgentFleetService:
"""
Service for orchestrating multi-agent fleets (Admiralty model).
Manages delegation chains, recruitment, and shared blackboard context.
"""
def __init__(self, db: Session):
self.db = db
def initialize_fleet(
self,
tenant_id: str,
root_agent_id: str,
root_task: str,
root_execution_id: Optional[str] = None,
initial_metadata: Optional[Dict[str, Any]] = None
) -> DelegationChain:
"""
Initializes a new delegation chain (a fleet root).
"""
logger.info(f"Initializing fleet for root agent {root_agent_id}, task: {root_task[:50]}...")
chain = DelegationChain(
tenant_id=tenant_id,
root_agent_id=root_agent_id,
root_task=root_task,
root_execution_id=root_execution_id,
status="active",
metadata_json=initial_metadata or {},
started_at=datetime.now(timezone.utc)
)
self.db.add(chain)
self.db.commit()
self.db.refresh(chain)
return chain
def recruit_member(
self,
chain_id: str,
parent_agent_id: str,
child_agent_id: str,
task_description: str,
context_json: Optional[Dict[str, Any]] = None,
link_order: int = 0,
optimization_metadata: Optional[Dict[str, Any]] = None
) -> ChainLink:
"""
Adds a new specialized agent to an active fleet.
"""
logger.info(f"Recruiting fleet member {child_agent_id} for chain {chain_id}")
# Merge optimization data into context
final_context = context_json or {}
if optimization_metadata:
final_context["optimization"] = optimization_metadata
link = ChainLink(
chain_id=chain_id,
parent_agent_id=parent_agent_id,
child_agent_id=child_agent_id,
task_description=task_description,
context_json=final_context,
status="pending",
link_order=link_order,
started_at=datetime.now(timezone.utc)
)
self.db.add(link)
# Increment total links in chain
chain = self.db.query(DelegationChain).filter(DelegationChain.id == chain_id).first()
if chain:
chain.total_links += 1
self.db.commit()
self.db.refresh(link)
return link
def update_blackboard(self, chain_id: str, updates: Dict[str, Any]):
"""
Updates the shared fleet context (blackboard).
"""
chain = self.db.query(DelegationChain).filter(DelegationChain.id == chain_id).first()
if not chain:
logger.error(f"Cannot update blackboard: Chain {chain_id} not found")
return
current_metadata = chain.metadata_json or {}
current_metadata.update(updates)
chain.metadata_json = current_metadata
self.db.commit()
logger.info(f"Updated blackboard for chain {chain_id}")
def get_blackboard(self, chain_id: str) -> Dict[str, Any]:
"""
Retrieves the shared fleet context.
"""
chain = self.db.query(DelegationChain).filter(DelegationChain.id == chain_id).first()
return chain.metadata_json if chain else {}
def update_link_status(
self,
link_id: str,
status: str,
result: Optional[Dict[str, Any]] = None,
error: Optional[str] = None
):
"""
Updates the status and result of a specific delegation link.
"""
link = self.db.query(ChainLink).filter(ChainLink.id == link_id).first()
if not link:
logger.error(f"Link {link_id} not found")
return
link.status = status
if result is not None:
link.result_json = result
if error is not None:
link.error_message = error
if status in ["completed", "failed"]:
link.completed_at = datetime.now(timezone.utc)
if link.started_at:
delta = link.completed_at - link.started_at
link.duration_ms = int(delta.total_seconds() * 1000)
self.db.commit()
logger.info(f"Link {link_id} updated to {status}")
# Trigger Self-Healing (Async)
if status in ["completed", "failed"]:
try:
from core.fleet.self_heal_service import SelfHealService
import asyncio
self_heal = SelfHealService(self.db)
# In Upstream, we also use background tasks to ensure low latency for the orchestrator
asyncio.create_task(self_heal.process_link_update(link_id))
except Exception as e:
logger.error(f"⚠️ Self-Heal Trigger Failed: {e}")
def complete_chain(self, chain_id: str, status: str = "completed"):
"""
Marks a delegation chain as finished.
"""
chain = self.db.query(DelegationChain).filter(DelegationChain.id == chain_id).first()
if not chain:
return
chain.status = status
chain.completed_at = datetime.now(timezone.utc)
self.db.commit()
logger.info(f"Chain {chain_id} finalized with status: {status}")
|