February 2017
Intermediate to advanced
434 pages
10h 27m
English
Content preview from Learning Concurrent Programming in Scala - Second EditionBecome 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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Reactor system services
In the earlier sections, we learned that reactors delimit concurrent executions, and that event streams allow routing events within each reactor. This is already a powerful set of abstractions, and we can use reactors and event streams to write all kinds of distributed programs. However, such a model is restricted to reactor computations only. We cannot, for example, start blocking I/O operations, read from a temperature sensor implemented in hardware, wait until a GPU computation completes, or react to temporal events. In some cases, we need to interact with the native capabilities of the OS, or tap into a rich ecosystem of existing libraries. For this purpose, every reactor system has a set of services: protocols that ...
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