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from __future__ import annotations

import asyncio
from typing import Any, Sequence

from airflow.exceptions import AirflowException
from import CloudComposerAsyncHook
from airflow.triggers.base import BaseTrigger, TriggerEvent

[docs]class CloudComposerExecutionTrigger(BaseTrigger): """The trigger handles the async communication with the Google Cloud Composer.""" def __init__( self, project_id: str, region: str, operation_name: str, gcp_conn_id: str = "google_cloud_default", impersonation_chain: str | Sequence[str] | None = None, pooling_period_seconds: int = 30, ): super().__init__() self.project_id = project_id self.region = region self.operation_name = operation_name self.gcp_conn_id = gcp_conn_id self.impersonation_chain = impersonation_chain self.pooling_period_seconds = pooling_period_seconds self.gcp_hook = CloudComposerAsyncHook( gcp_conn_id=self.gcp_conn_id, impersonation_chain=self.impersonation_chain, )
[docs] def serialize(self) -> tuple[str, dict[str, Any]]: return ( "", { "project_id": self.project_id, "region": self.region, "operation_name": self.operation_name, "gcp_conn_id": self.gcp_conn_id, "impersonation_chain": self.impersonation_chain, "pooling_period_seconds": self.pooling_period_seconds, }, )
[docs] async def run(self): while True: operation = await self.gcp_hook.get_operation(operation_name=self.operation_name) if operation.done: break elif operation.error.message: raise AirflowException(f"Cloud Composer Environment error: {operation.error.message}") await asyncio.sleep(self.pooling_period_seconds) yield TriggerEvent( { "operation_name":, "operation_done": operation.done, } )

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