--- /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.cdsim;
+
+import java.util.Arrays;
+import peersim.config.Configuration;
+import peersim.core.Node;
+import peersim.core.Control;
+
+/**
+* A protocol that is not really a protocol, but a trick to carry out all
+* kinds of tasks during the simulation. Many users will probably not need it,
+* but it is a nice way to e.g. run controls at any time, not only between cycles.
+*/
+public class DaemonProtocol implements CDProtocol {
+
+
+// ========================= fields =================================
+// ==================================================================
+
+
+/**
+* This is the prefix for network dynamism managers.
+* @config
+*/
+private static final String PAR_CTRL = "control";
+
+/**
+* The controls will be run according to this frequency.
+* It is interpreted within a cycle, in terms of cycle time
+* ({@link CDState#getCycleT}). The first cycletime is 0.
+* Defaults to 1.
+* @config
+*/
+private static final String PAR_STEP = "cstep";
+
+// --------------------------------------------------------------------
+
+private static Control[] controls=null;
+
+private static int step;
+
+// ========================= initialization =========================
+// ==================================================================
+
+
+public DaemonProtocol(String s)
+{
+ step = Configuration.getInt(s+"."+PAR_STEP,1);
+
+ String[] names = Configuration.getNames(s+"."+PAR_CTRL);
+ controls = new Control[names.length];
+ for(int i=0; i<names.length; ++i)
+ {
+ controls[i]=(Control)Configuration.getInstance(names[i]);
+ }
+ System.err.println(s+": loaded controls "+Arrays.asList(names));
+}
+
+// ------------------------------------------------------------------
+
+public Object clone() {
+
+ DaemonProtocol ip = null;
+ try { ip=(DaemonProtocol)super.clone(); }
+ catch( CloneNotSupportedException e ) {} // never happens
+ return ip;
+}
+
+
+// ========================= methods =================================
+// ===================================================================
+
+
+/**
+* Runs the configured controls if {@link CDState#getCycleT} %
+* {@value #PAR_STEP}=0.
+*/
+public void nextCycle( Node node, int protocolID ) {
+
+ if( CDState.getCycleT() % step != 0 ) return;
+ for(int j=0; j<controls.length; ++j) controls[j].execute();
+}
+
+}
+
