+++ /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.dynamics;
-
-import peersim.core.*;
-import peersim.config.Configuration;
-
-/**
- * Initializes a node's neighbor list with a fixed center.
- */
-public class StarNI implements NodeInitializer {
-
-
-// ========================= fields =================================
-// ==================================================================
-
-
-/**
- * The protocol to operate on.
- * @config
- */
-private static final String PAR_PROT = "protocol";
-
-/**
- * If this config property is defined, method {@link Linkable#pack()} is
- * invoked on the specified protocol at the end of the wiring phase.
- * Default to false.
- * @config
- */
-private static final String PAR_PACK = "pack";
-
-/**
- * The protocol we want to wire
- */
-protected final int pid;
-
-/** If true, method pack() is invoked on the initialized protocol */
-protected final boolean pack;
-
-/**
- * Used as center: nodes will link to this node.
- */
-protected Node center = null;
-
-
-// ==================== initialization ==============================
-//===================================================================
-
-
-public StarNI(String prefix) {
-
- pid = Configuration.getPid(prefix+"."+PAR_PROT);
- pack = Configuration.contains(prefix+"."+PAR_PACK);
-}
-
-
-// ===================== public methods ==============================
-// ===================================================================
-
-
-/**
- * Adds a link to a fixed node, the center. This fixed node remains the same
- * throughout consecutive calls to this method. If the center fails in the
- * meantime, a new one is chosen so care should be taken. The center is the
- * first node that is not down (starting from node 0, 1, etc)
- * at the time of the first call to the function. When a new center needs to
- * be chosen (the current one is down), the new center is again the first
- * one which is up. If no nodes are up, the node with the last index is set
- * as center, and selection of a new center is always attempted when this
- * method is called again.
- */
-public void initialize(Node n) {
-
- if( Network.size() == 0 ) return;
-
- for(int i=0; (center==null || !center.isUp()) && i<Network.size(); ++i)
- center=Network.get(i);
-
- ((Linkable)n.getProtocol(pid)).addNeighbor(center);
-
- if(pack)
- {
- ((Linkable)n.getProtocol(pid)).pack();
- }
-}
-
-}
-
