May 2019
Intermediate to advanced
464 pages
9h 22m
Japanese
Content preview from Node.jsデザインパターン 第2版
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11.3
パイプラインとタスク分散パターン
405
$ node ventilator 4 f8e966d1e207d02c44511a58dccff2f5429e9a3b
上のコマンドを実行するとベンチレータが処理を開始します。長さ最長
4
文字の考えられるすべての
単語を生成し、指定したチェックサムと合わせて予め起動しておいた各ワーカーへ分配します。計算
結果は、一致するものが得られればシンクアプリケーションのターミナルに表示されます。
11.3.2
パイプラインと
AMQP
の競合コンシューマ
前の節では、並列パイプラインをピアツーピア方式の場合に実装する方法を見ました。今度は、
RabbitMQ
などの本格的なメッセージブローカにこのパターンを適用する方法を探っていきます。
11.3.2.1
ポイントツーポイント通信と競合コンシューマ
ピアツーピア構成の場合、パイプラインはイメージしやすいとても単純明快な概念です。しかしメッ
セージブローカが間に入るとシステムの各種ノードの関係を理解するのが少し難しくなります。ブロー
カ自体は通信の仲介者として働きますが、その向こうでメッセージをリッスンしているのが何者かわか
らない場合があります。たとえば、
AMQP
を使ってメッセージを送信する場合、宛先に直接届けるの
ではなく交換器に送ってそれがキューに入ります。最終的にメッセージの配送経路を決定するのはブ
ローカであり、交換器に定義されている規則とバインド、宛先キューに基づいてそれを行います。
AMQP
などのシステムを使
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.