missionary.core/via

Usage

• (via executor & body)

JVM only.

A macro operator returning a task evaluating body, in an implicit do, via a java.util.concurrent.Executor. via process completes with the evaluation result, or crashes if an exception is thrown. Cancelling via process interrupts evaluating thread.

Example : assign a cpu-intensive operation to a fixed thread pool

(def fib42
  (m/via m/cpu
    ((fn fib [n]
       (case n
         0 0
         1 1
         (+ (fib (dec n))
           (fib (dec (dec n))))))
     42)))

(m/? fib42) := 267914296

Synchronicity

• via completion is not synchronous with via spawn

See also

• via-call
• blk
• cpu