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/* Copyright (c) 2010-2025. 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. */
/* This example shows how to suspend and resume an asynchronous communication. */
import org.simgrid.s4u.*;
class sender extends Actor {
public void run() throws SimgridException
{
Mailbox mbox = this.get_engine().mailbox_by_name("receiver");
String payload = "Sent message";
/* Create a communication representing the ongoing communication and then */
Comm comm = mbox.putInit(payload, 13194230);
Engine.info(String.format("Suspend the communication before it starts (remaining: %.0f bytes) and wait a second.",
comm.get_remaining()));
sleep_for(1);
Engine.info(String.format("Now, start the communication (remaining: %.0f bytes) and wait another second.",
comm.get_remaining()));
comm.start();
sleep_for(1);
Engine.info(String.format("There is still %.0f bytes to transfer in this communication. Suspend it for one second.",
comm.get_remaining()));
comm.suspend();
Engine.info(String.format("Now there is %.0f bytes to transfer. Resume it and wait for its completion.",
comm.get_remaining()));
comm.resume();
comm.await();
Engine.info(
String.format("There is %f bytes to transfer after the communication completion.", comm.get_remaining()));
Engine.info("Suspending a completed activity is a no-op.");
comm.suspend();
}
}
class receiver extends Actor {
public void run() throws SimgridException
{
Mailbox mbox = this.get_engine().mailbox_by_name("receiver");
Engine.info("Wait for the message.");
String received = (String)mbox.get();
Engine.info("I got '" + received + "'.");
}
}
public class comm_suspend {
public static void main(String[] args)
{
Engine e = new Engine(args);
e.load_platform(args[0]);
e.host_by_name("Tremblay").add_actor("sender", new sender());
e.host_by_name("Jupiter").add_actor("receiver", new receiver());
e.run();
// 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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