+++ /dev/null
-/*
- * Copyright (c) 2003-2005 The BISON Project
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-package peersim.transport;
-
-import peersim.config.*;
-import peersim.core.*;
-import peersim.edsim.*;
-
-
-/**
- * Implement a transport layer that reliably delivers messages with a random
- * delay, that is drawn from the configured interval according to the uniform
- * distribution.
- *
- * @author Alberto Montresor
- * @version $Revision: 1.14 $
- */
-public final class UniformRandomTransport implements Transport
-{
-
-//---------------------------------------------------------------------
-//Parameters
-//---------------------------------------------------------------------
-
-/**
- * String name of the parameter used to configure the minimum latency.
- * @config
- */
-private static final String PAR_MINDELAY = "mindelay";
-
-/**
- * String name of the parameter used to configure the maximum latency.
- * Defaults to {@value #PAR_MINDELAY}, which results in a constant delay.
- * @config
- */
-private static final String PAR_MAXDELAY = "maxdelay";
-
-//---------------------------------------------------------------------
-//Fields
-//---------------------------------------------------------------------
-
-/** Minimum delay for message sending */
-private final long min;
-
-/** Difference between the max and min delay plus one. That is, max delay is
-* min+range-1.
-*/
-private final long range;
-
-
-//---------------------------------------------------------------------
-//Initialization
-//---------------------------------------------------------------------
-
-/**
- * Reads configuration parameter.
- */
-public UniformRandomTransport(String prefix)
-{
- min = Configuration.getLong(prefix + "." + PAR_MINDELAY);
- long max = Configuration.getLong(prefix + "." + PAR_MAXDELAY,min);
- if (max < min)
- throw new IllegalParameterException(prefix+"."+PAR_MAXDELAY,
- "The maximum latency cannot be smaller than the minimum latency");
- range = max-min+1;
-}
-
-//---------------------------------------------------------------------
-
-/**
-* Returns <code>this</code>. This way only one instance exists in the system
-* that is linked from all the nodes. This is because this protocol has no
-* node specific state.
-*/
-public Object clone()
-{
- return this;
-}
-
-//---------------------------------------------------------------------
-//Methods
-//---------------------------------------------------------------------
-
-/**
- * Delivers the message with a random
- * delay, that is drawn from the configured interval according to the uniform
- * distribution.
-*/
-public void send(Node src, Node dest, Object msg, int pid)
-{
- // avoid calling nextLong if possible
- long delay = (range==1?min:min + CommonState.r.nextLong(range));
- EDSimulator.add(delay, msg, dest, pid);
-}
-
-/**
- * Returns a random
- * delay, that is drawn from the configured interval according to the uniform
- * distribution.
-*/
-public long getLatency(Node src, Node dest)
-{
- return (range==1?min:min + CommonState.r.nextLong(range));
-}
-
-
-}
