[アップデート]AWS SAM CLIのローカルLambdaエンドポイント(start-lambda)が非同期タイプの実行をサポートするようになりました

% sam --version
SAM CLI, version 1.149.0

% aws lambda invoke --function-name HelloWorldFunction --endpoint-url http://127.0.0.1:3001 --invocation-type Event /dev/stdout
...
2026-02-12 18:56:05,946 - MainThread - botocore.endpoint - DEBUG - Sending http request: <AWSPreparedRequest stream_output=True, method=POST, url=http://127.0.0.1:3001/2015-03-31/functions/HelloWorldFunction/invocations, headers={'X-Amz-Invocation-Type': b'Event', 'User-Agent': b'aws-cli/2.32.10 md/awscrt#0.29.1 ua/2.1 os/macos#25.2.0 md/arch#arm64 lang/python#3.13.9 md/pyimpl#CPython m/N,Z,g,E,b cfg/retry-mode#standard md/installer#exe sid/dbc23cea9051 md/prompt#off md/command#lambda.invoke', 'X-Amz-Date': b'20260212T095605Z', 'Authorization': b'AWS4-HMAC-SHA256 Credential=xxxxxxxx/20260212/ap-northeast-1/lambda/aws4_request, SignedHeaders=host;x-amz-date;x-amz-invocation-type, Signature=xxxxxxx', 'Content-Length': '0'}>
2026-02-12 18:56:05,946 - MainThread - urllib3.connectionpool - DEBUG - Starting new HTTP connection (1): 127.0.0.1:3001
2026-02-12 18:56:05,950 - MainThread - urllib3.connectionpool - DEBUG - http://127.0.0.1:3001 "POST /2015-03-31/functions/HelloWorldFunction/invocations HTTP/1.1" 501 114
2026-02-12 18:56:05,950 - MainThread - botocore.parsers - DEBUG - Response headers: {'Server': 'Werkzeug/3.1.4 Python/3.13.9', 'Date': 'Thu, 12 Feb 2026 09:56:05 GMT', 'x-amzn-errortype': 'NotImplemented', 'Content-Type': 'application/json', 'Content-Length': '114', 'Connection': 'close'}
2026-02-12 18:56:05,950 - MainThread - botocore.parsers - DEBUG - Response body:
b'{"Type": "LocalService", "Message": "invocation-type: Event is not supported. RequestResponse is only supported."}'
...
An error occurred (NotImplemented) when calling the Invoke operation: invocation-type: Event is not supported. RequestResponse is only supported.

% /tmp/venv/bin/sam --version
SAM CLI, version 1.151.0

% sam local start-lambda
Initializing the lambda functions containers.                                                     Local image is up-to-date                                                                         Using local image: public.ecr.aws/lambda/python:3.14-rapid-x86_64.

Mounting /Users/xxxxx/sam-app/hello_world as /var/task:ro,delegated, inside runtime container     SAM_CONTAINER_ID: 2a3f80b73a3b723c187181f0f44c32233cdb026d2c0a0222769904efc9f8cae7               Containers created. Waiting for readiness...                                                     Waiting for 1 containers to be running...                                                         All 1 containers running after 0.0 seconds                                                       All containers are ready.                                                                         Starting the Local Lambda Service. You can now invoke your Lambda Functions defined in your template through the endpoint.                                                                   2026-02-12 19:20:03 WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
 * Running on http://127.0.0.1:3001
2026-02-12 19:20:03 Press CTRL+C to quit

import json

def lambda_handler(event, context):
    return {
        "statusCode": 200,
        "body": json.dumps({
            "message": "hello world",
        }),
    }

## 非同期実行
% aws lambda invoke --function-name HelloWorldFunction --endpoint-url http://127.0.0.1:3001 --invocation-type Event  /dev/stdout
{
    "StatusCode": 202
}

## 未指定(同期実行)の場合
% aws lambda invoke --function-name HelloWorldFunction --endpoint-url http://127.0.0.1:3001  /dev/stdout
{"statusCode": 200, "body": "{\"message\": \"hello world\"}"}
    "StatusCode": 200
}

import json
import time
from datetime import datetime
def lambda_handler(event, context):
    for i in range(120):
        print(f"ループ回数{i}")
        time.sleep(1)

    return {
        "statusCode": 200,
        "body": json.dumps({
            "message": "hello world"
        }),
    }