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/* Copyright (c) 2007-2025. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
import org.simgrid.s4u.*;
/* This actor simply starts an activity in a fire and forget (a.k.a. detached) mode and quit.*/
class detached extends Actor {
public void run()
{
double computation_amount = get_host().get_speed();
Engine.info("Execute %g flops, should take 1 second.", computation_amount);
Exec activity = exec_init(computation_amount);
// Attach a callback to print some log when the detached activity completes
activity.on_this_completion_cb(new CallbackExec() {
@Override public void run(Exec e)
{
Engine.info("Detached activity is done");
}
});
activity.detach();
Engine.info("Goodbye now!");
}
}
/* This actor simply waits for its activity completion after starting it.
* That's exactly equivalent to synchronous execution. */
class waiter extends Actor {
public void run() throws SimgridException
{
double computation_amount = get_host().get_speed();
Engine.info("Execute %g flops, should take 1 second.", computation_amount);
Exec activity = exec_init(computation_amount);
activity.start();
activity.await();
Engine.info("Goodbye now!");
}
}
/* This actor tests the ongoing execution until its completion, and don't wait before it's terminated. */
class monitor extends Actor {
public void run()
{
double computation_amount = get_host().get_speed();
Engine.info("Execute %g flops, should take 1 second.", computation_amount);
Exec activity = exec_init(computation_amount);
activity.start();
while (!activity.test()) {
Engine.info("Remaining amount of flops: %g (%.0f%%)", activity.get_remaining(),
100 * activity.get_remaining_ratio());
sleep_for(0.3);
}
Engine.info("Goodbye now!");
}
}
/* This actor cancels the ongoing execution after a while. */
class canceller extends Actor {
public void run()
{
double computation_amount = get_host().get_speed();
Engine.info("Execute %g flops, should take 1 second.", computation_amount);
Exec activity = exec_async(computation_amount);
sleep_for(0.5);
Engine.info("I changed my mind, cancel!");
activity.cancel();
Engine.info("Goodbye now!");
}
}
public class exec_async {
public static void main(String[] args)
{
Engine e = new Engine(args);
e.load_platform(args[0]);
e.host_by_name("Fafard").add_actor("wait", new waiter());
e.host_by_name("Ginette").add_actor("monitor", new monitor());
e.host_by_name("Boivin").add_actor("cancel", new canceller());
e.host_by_name("Tremblay").add_actor("detach", new detached());
e.run();
Engine.info("Simulation ends.");
// The following call is useless in your code, but our continuous integration uses it to track memleaks
e.force_garbage_collection();
}
}
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