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実践Akka

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社内勉強会のAkka発表資料

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実践Akka

  1. 1. 実践akka @huydx Adtech studio
  2. 2. ScalaおよびJava向けの並列 および分散処理フレームワー クです。
  3. 3. Actor == 人
  4. 4. Actorに関する概念 • Dispatcher • MailBox • Tell/Ask • Supervisor • Eventbus
  5. 5. Actorに関する概念 • Dispatcher • MailBox • Tell/Ask • Supervisor • Eventbus Executor Pool Message Queue RPC Manager Pub/Sub
  6. 6. Actorってなのためのもの?
  7. 7. •Concurrency? •Parallelism?
  8. 8. •Concurrency? •Parallelism?
  9. 9. Java世界では? • 並行処理プログラミングが難しい • @volatile, share variable, mutex, synchronized, lockなどなど • Concurrent Packageでだいぶ助かった • Atomic 変数、Executor Pool….
  10. 10. Actor世界では? • 全部ノンブロッキング • メールボックスの中のものを順次に処理する
  11. 11. Faq • 共有なメモリを使いたい? • 共有メモリを管理する専用Actorを利用して、 そのActorに問い合わせする • Actorに送ったメッセージすぐ回答もらいたい? • Askパータンが用意されている
  12. 12. Actorの他にいいところ • Monitoring構成で失敗したActor・処理できな いメッセージを簡単にリーランできる(self- healingシステム実現可能) • Actorはアドレス・パスで管理しやすい • Remote Actorで分散システムが実現可能
  13. 13. 設計Faq • できるだけ一つのActorが小さいなタスクをやるべ き • 設計するときに失敗するシナリオを考えるべき(let- it-crash) • Actor Systemをたくさん作らない • メッセージをシリアライズできるものしか送らない

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