+# Copyright (c) 2006-2018. 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 declare and start your actors.
+#
+# The first step is to declare the code of your actors (what they do exactly does not matter to this example) and then
+# you ask SimGrid to start your actors. There is three ways of doing so:
+# - Directly, by instantiating your actor as paramter to Actor::create()
+# - By first registering your actors before instantiating it;
+# - Through the deployment file.
+#
+# This example shows all these solutions, even if you obviously should use only one of these solutions to start your
+# actors. The most advised solution is to use a deployment file, as it creates a clear separation between your
+# application and the settings to test it. This is a better scientific methodology. Actually, starting an actor with
+# Actor.create() is mostly useful to start an actor from another actor.
+
+import simgrid, sys
+
+# Our first class of actors is simply implemented with a function, that takes a single string as parameter.
+#
+# Later, this actor class is instantiated within the simulation.
+def receiver(mailbox_name):
+ mailbox = simgrid.Mailbox.by_name(mailbox_name)
+
+ simgrid.info("Hello s4u, I'm ready to get any message you'd want on {:s}".format(mailbox.get_name()))
+
+ msg1 = mailbox.get()
+ msg2 = mailbox.get()
+ msg3 = mailbox.get()
+ simgrid.info("I received '{:s}', '{:s}' and '{:s}'".format(msg1, msg2, msg3))
+ simgrid.info("I'm done. See you.")
+
+# Our second class of actors is also a function
+def forwarder(*args):
+ if len(args) < 2: raise AssertionError("Actor forwarder requires 2 parameters, but got only {:d}".format(len(args)))
+ mb_in = simgrid.Mailbox.by_name(args[0])
+ mb_out = simgrid.Mailbox.by_name(args[1])
+
+ msg = mb_in.get()
+ simgrid.info("Forward '{:s}'.".format(msg))
+ mb_out.put(msg, len(msg))
+
+# Declares a third class of actors which sends a message to the mailbox 'mb42'.
+# The sent message is what was passed as parameter on creation (or 'GaBuZoMeu' by default)
+#
+# Later, this actor class is instantiated twice in the simulation.
+class Sender:
+ mbox = "mb42"
+ msg = "GaBuZoMeu";
+ def __init__(self, *args):
+ if len(args) > 0: self.msg = args[0];
+ if len(args) > 1: self.mbox = args[1];
+ if len(args) > 2: raise AssertionError("Actor sender requires 2 parameters, but got only {:d}".format(len(args)))
+
+ def __call__(self):
+ simgrid.info("Hello s4u, I have something to send")
+ mailbox = simgrid.Mailbox.by_name(self.mbox)
+
+ mailbox.put(self.msg, len(self.msg))
+ simgrid.info("I'm done. See you.")
+
+# Here comes the main function of your program
+if __name__ == '__main__':
+ # When your program starts, you have to first start a new simulation engine, as follows
+ e = simgrid.Engine(sys.argv)
+
+ # Then you should load a platform file, describing your simulated platform
+ e.load_platform("../platforms/small_platform.xml");
+
+ # And now you have to ask SimGrid to actually start your actors.
+ #
+ # The easiest way to do so is to implement the behavior of your actor in a single function,
+ # as we do here for the receiver actors. This function can take any kind of parameters, as
+ # long as the last parameters of Actor::create() match what your function expects.
+ simgrid.Actor.create("receiver", simgrid.Host.by_name("Fafard"), receiver, "mb42")
+
+ # If your actor is getting more complex, you probably want to implement it as a class instead,
+ # as we do here for the sender actors. The main behavior goes into operator()() of the class.
+ #
+ # You can then directly start your actor, as follows:
+ simgrid.Actor.create("sender1", simgrid.Host.by_name("Tremblay"), Sender())
+ # If you want to pass parameters to your class, that's very easy: just use your constructors
+ simgrid.Actor.create("sender2", simgrid.Host.by_name("Jupiter"), Sender("GloubiBoulga"));
+
+ # But starting actors directly is considered as a bad experimental habit, since it ties the code
+ # you want to test with the experimental scenario. Starting your actors from an external deployment
+ # file in XML ensures that you can test your code in several scenarios without changing the code itself.
+ #
+ # For that, you first need to register your function or your actor as follows.
+ e.register_actor("sender", Sender)
+ e.register_actor("forwarder", forwarder)
+ # Once actors and functions are registered, just load the deployment file
+ e.load_deployment("actor-create/actor-create_d.xml")
+
+ # Once every actors are started in the engine, the simulation can start
+ e.run();
+
+ # Once the simulation is done, the program is ended
