Last active
December 15, 2025 13:36
-
-
Save t3yamoto/cae9eb847b1626e5164d2914f56055aa to your computer and use it in GitHub Desktop.
aws-durable-execution-sdk-python で wait_for_condition を使うサンプル
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| from aws_durable_execution_sdk_python import ( | |
| durable_execution, | |
| durable_step, | |
| DurableContext, | |
| StepContext, | |
| ) | |
| from aws_durable_execution_sdk_python.waits import ( | |
| WaitForConditionConfig, | |
| WaitForConditionDecision, | |
| ) | |
| from aws_durable_execution_sdk_python.config import Duration | |
| from aws_durable_execution_sdk_python.types import WaitForConditionCheckContext | |
| from typing import TypedDict, NotRequired | |
| import boto3 | |
| ec2 = boto3.client("ec2") | |
| class State(TypedDict): | |
| instance_id: str | |
| status: NotRequired[str] | |
| @durable_execution | |
| def lambda_handler(event: dict, context: DurableContext) -> dict: | |
| print("Durable function の実行を開始します") | |
| # イベント変数からインスタンス ID を取得 | |
| instance_id = event["instance_id"] | |
| # EC2 インスタンス起動 API （非同期）を呼び出す | |
| context.step(start_instance(instance_id)) | |
| # インスタンスの状態が "running" になるまでポーリングする | |
| result = context.wait_for_condition( | |
| check=check_status, | |
| config=WaitForConditionConfig( | |
| initial_state={"instance_id": instance_id}, | |
| wait_strategy=wait_strategy, | |
| ), | |
| ) | |
| print("Durable function の実行を終了します") | |
| return result | |
| @durable_step | |
| def start_instance(context: StepContext, instance_id: str): | |
| ec2.start_instances(InstanceIds=[instance_id]) | |
| def check_status(state: State, context: WaitForConditionCheckContext) -> State: | |
| print(f"ステータスチェック開始: {state}") | |
| res = ec2.describe_instances(InstanceIds=[state["instance_id"]]) | |
| instance_state = res["Reservations"][0]["Instances"][0]["State"]["Name"] | |
| state = {"instance_id": state["instance_id"], "status": instance_state} | |
| print(f"ステータスチェック結果: {state}") | |
| return state | |
| def wait_strategy(state: State, attempt: int) -> WaitForConditionDecision: | |
| if state.get("status") == "running": | |
| print("インスタンスが running 状態になりました。ポーリングを終了します") | |
| return WaitForConditionDecision.stop_polling() | |
| else: | |
| print("インスタンスが running 状態ではありません。ポーリングを継続します") | |
| return WaitForConditionDecision.continue_waiting(Duration.from_seconds(10)) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment