Transfer/share resources and attributes between clones

[Enchufa2]

Currently, each cloned arrival is a separate entity that is reponsible for its own seized resources and attributes (which, e.g., makes parallel tasks a bit tricky). Some mechanism to transfer or share this responsibility may be interesting.

[thigger]

Hehe, sorry - ignore my comment in #206 - great minds think alike!

[Enchufa2]

It might also be interesting to set some kind of clone index.

[Enchufa2]

@thigger The following may be of interest to you. Discussing a similar issue, I've come up with an alternative, more general way of dealing with this kind of situation:

library(simmer)

t <- trajectory() %>%
  seize("room") %>%
  clone(
    n = 3,
    trajectory("controller") %>%
      trap("clone end"),
    trajectory("doctor") %>%
      timeout(1) %>%
      send("clone end"),
    trajectory("nurse") %>%
      timeout(2) %>%
      send("clone end")) %>%
  synchronize(wait = FALSE) %>%
  wait() %>%
  wait() %>%
  timeout(0.5) %>%
  release("room")

simmer() %>%
  add_resource("room") %>%
  add_generator("visit", t, at(0)) %>%
  run()

Particularly, in the case I was discussing, two units were seized at the beginning (one per clone), and then they were released one by one after each wait(). So I think this approach is quite flexible. I may even change the implementation of simmer.bricks::do_parallel to this simpler one.