|
| 1 | +import asyncio |
| 2 | +import json |
| 3 | +import os |
| 4 | + |
| 5 | +from a2a.server.agent_execution import AgentExecutor, RequestContext |
| 6 | +from a2a.server.apps.jsonrpc import A2AFastAPIApplication |
| 7 | +from a2a.server.events import EventQueue |
| 8 | +from a2a.server.request_handlers import DefaultRequestHandler |
| 9 | +from a2a.server.tasks import InMemoryTaskStore |
| 10 | +from a2a.types import Artifact, TaskState, TaskStatus, TaskStatusUpdateEvent, TaskArtifactUpdateEvent, TextPart, AgentCard, AgentCapabilities, AgentSkill |
| 11 | +from fastapi.middleware.cors import CORSMiddleware |
| 12 | + |
| 13 | +from investigator_crew import InvestigatorCrew |
| 14 | +from payload import payload |
| 15 | + |
| 16 | + |
| 17 | +class InvestigatorExecutor(AgentExecutor): |
| 18 | + async def execute(self, context: RequestContext, event_queue: EventQueue) -> None: |
| 19 | + await event_queue.enqueue_event( |
| 20 | + TaskStatusUpdateEvent(task_id=context.task_id, context_id=context.context_id, status=TaskStatus(state=TaskState.working), final=False) |
| 21 | + ) |
| 22 | + user_input = context.get_user_input() |
| 23 | + try: |
| 24 | + parsed = json.loads(user_input) |
| 25 | + user_request = parsed.get("user_request", user_input) |
| 26 | + suspect_names = parsed.get("suspect_names", user_input) |
| 27 | + except (json.JSONDecodeError, TypeError): |
| 28 | + user_request = user_input |
| 29 | + suspect_names = user_input |
| 30 | + |
| 31 | + loop = asyncio.get_event_loop() |
| 32 | + result = await loop.run_in_executor( |
| 33 | + None, |
| 34 | + lambda: InvestigatorCrew().crew().kickoff( |
| 35 | + inputs={"payload": payload, "user_request": user_request, "suspect_names": suspect_names} |
| 36 | + ), |
| 37 | + ) |
| 38 | + await event_queue.enqueue_event( |
| 39 | + TaskArtifactUpdateEvent( |
| 40 | + task_id=context.task_id, |
| 41 | + context_id=context.context_id, |
| 42 | + artifact=Artifact(artifactId="investigation_result", parts=[TextPart(text=str(result))], name="investigation_result"), |
| 43 | + ) |
| 44 | + ) |
| 45 | + await event_queue.enqueue_event( |
| 46 | + TaskStatusUpdateEvent(task_id=context.task_id, context_id=context.context_id, status=TaskStatus(state=TaskState.completed), final=True) |
| 47 | + ) |
| 48 | + |
| 49 | + async def cancel(self, context: RequestContext, event_queue: EventQueue) -> None: |
| 50 | + await event_queue.enqueue_event( |
| 51 | + TaskStatusUpdateEvent(task_id=context.task_id, context_id=context.context_id, status=TaskStatus(state=TaskState.canceled), final=True) |
| 52 | + ) |
| 53 | + |
| 54 | + |
| 55 | +agent_card = AgentCard( |
| 56 | + name="Investigator Crew", |
| 57 | + description="Multi-agent art theft investigation crew exposed as an A2A server", |
| 58 | + url=os.environ.get("APP_URL", "http://localhost:8080"), |
| 59 | + version="1.0.0", |
| 60 | + capabilities=AgentCapabilities(streaming=False), |
| 61 | + skills=[ |
| 62 | + AgentSkill( |
| 63 | + id="investigate", |
| 64 | + name="Investigate Art Theft", |
| 65 | + description="Investigates art theft cases by appraising losses and analyzing evidence", |
| 66 | + tags=["investigation", "art", "insurance", "theft"], |
| 67 | + inputModes=["text/plain"], |
| 68 | + outputModes=["text/markdown"], |
| 69 | + ) |
| 70 | + ], |
| 71 | + defaultInputModes=["text/plain"], |
| 72 | + defaultOutputModes=["text/markdown"], |
| 73 | +) |
| 74 | +handler = DefaultRequestHandler(agent_executor=InvestigatorExecutor(), task_store=InMemoryTaskStore()) |
| 75 | +app = A2AFastAPIApplication(agent_card=agent_card, http_handler=handler).build() |
| 76 | + |
| 77 | +app.add_middleware( |
| 78 | + CORSMiddleware, |
| 79 | + allow_origins=["*"], |
| 80 | + allow_methods=["*"], |
| 81 | + allow_headers=["*"], |
| 82 | +) |
| 83 | + |
| 84 | + |
| 85 | +@app.get("/health") |
| 86 | +def health(): |
| 87 | + return {"status": "ok"} |
| 88 | + |
| 89 | + |
| 90 | +if __name__ == "__main__": |
| 91 | + import uvicorn |
| 92 | + uvicorn.run(app, host="0.0.0.0", port=int(os.environ.get("PORT", 8080))) |
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