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johnynek
/ twophase.scala
Last active
October 2, 2020 22:36
A two-phase commit Transaction Monad. See: http://en.wikipedia.org/wiki/Two-phase_commit_protocol
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| // Run this with scala <filename> | |
| /** | |
| * A Two-phase commit Monad | |
| */ | |
| trait Transaction[+T] { | |
| def map[U](fn: T => U): Transaction[U] = flatMap { t => Constant(fn(t)) } | |
| def flatMap[U](fn: T => Transaction[U]): Transaction[U] = | |
| FlatMapped(this, fn) |