前回の「送金のトランザクション処理パターン」では、EntityGroupにまたがるトランザクション処理について簡単に紹介しました。 様々なコメントいただきまして(ありがとうございます)、どうやら「Distributed Transactions on App Engine - Nick's Blog」のやり方が非常に優れているようですので、今回は「送金のトランザクション処理パターン」で紹介した手法に最適化を施して、Nickさんのやり方に近付けてみようと思います。 今回紹介する最適化は、前回のような「狭い範囲のACIDトランザクション」と「べき等性による処理の伝搬」を組み合わせた分散トランザクション一般に適用できそうな手法です。そんなに大層なことはしていませんが、例によってまだ構想段階ですので、また至らない点があればご指摘いただければ幸いです。 おさらい 送金のトランザクション処理パターンで
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