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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 use Activity.await() to wait for a given communication. */
import org.simgrid.s4u.*;
class sender extends Actor {
int messagesCount;
int payloadSize;
public sender(int messagesCount, int payloadSize)
{
this.messagesCount = messagesCount;
this.payloadSize = payloadSize;
}
public void run() throws SimgridException
{
double sleepStartTime = 5.0;
double sleepTestTime = 0;
Mailbox mbox = this.get_engine().mailbox_by_name("receiver");
Engine.info("sleep_start_time : %f , sleep_test_time : %f", sleepStartTime, sleepTestTime);
sleep_for(sleepStartTime);
for (int i = 0; i < messagesCount; i++) {
String payload = "Message " + i;
/* Create a communication representing the ongoing communication and then */
Comm comm = mbox.put_async(payload, payloadSize);
Engine.info("Send '%s' to '%s'", payload, mbox.get_name());
if (sleepTestTime > 0) { /* - "test_time" is set to 0, wait */
while (!comm.test()) { /* - Call test() every "sleep_test_time" otherwise */
sleep_for(sleepTestTime);
}
} else {
comm.await();
}
}
/* Send message to let the receiver know that it should stop */
Engine.info("Send 'finalize' to 'receiver'");
mbox.put("finalize", 0);
}
}
class receiver extends Actor {
public void run()
{
double sleepStartTime = 1.0;
double sleepTestTime = 0.1;
Mailbox mbox = this.get_engine().mailbox_by_name("receiver");
Engine.info("sleep_start_time : %f , sleep_test_time : %f", sleepStartTime, sleepTestTime);
sleep_for(sleepStartTime);
Engine.info("Wait for my first message");
for (boolean moreMessages = true; moreMessages;) { // While we expect more messages
Comm comm = mbox.get_async();
// Such an active loop is possible but inefficient. If you don't have anything to do meanwhile, just use await()
while (!comm.test()) {
sleep_for(sleepTestTime);
// I could deal with other things while waiting for the message to come
}
String received = (String)comm.get_payload();
Engine.info("I got a '%s'.", received);
if (received.equals("finalize"))
moreMessages = false; // If it's a finalize message, we're done.
}
}
}
public class comm_await {
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(3, 482117300));
e.host_by_name("Ruby").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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