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@shinichi-takahashi

AWS LambdaからLambda呼んでハマった話。

Lambda(Python)からLambdaの呼び方

import boto3

def lambda_handler(event, context):
    clientLambda = boto3.client("lambda")
    clientLambda.invoke(
        FunctionName="recieveMail",
        InvocationType="Event",
        Payload=json.dumps(event)
    )

boto3のlambda clientから invoke() メソッドで呼び出すんですが、
InvocationType がよくわかってなくつかっててハマってました。

こいつ、Event|RequestResponse のどちらかを受け取るんですが、
Event は非同期で、
RequestResponse は同期で、
それぞれ動きます。

SESのEventで大量のメール処理をしようと思って適当に RequestResponse 選んで全然さばけない問題にぶちあたって調査したら、ちゃんと (?) マークのとこに説明がありました。

悪いのは私でした。ってお話。

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