January 2018
Intermediate to advanced
336 pages
7h 22m
English
Content preview from Node.js 8 the Right WayBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Routing and Dealing Messages
The REQ/REP socket pair we explored makes request/reply logic easy to code by operating sequentially. The Node.js code for a given responder will only ever be aware of one message at a time.
For parallel message processing, ØMQ includes the more advanced socket types ROUTER and DEALER. Let’s explore these a bit; then we’ll be ready to construct our Node.js cluster.
Routing Messages
You can think of a ROUTER socket as a parallel REP socket. Rather than replying to only one message at a time, a ROUTER socket can handle many requests simultaneously. It remembers which connection each request came from and will route reply messages accordingly.
Recall from Implementing a Messaging Protocol, that any time you do networked ...
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