Main init() {
// Create a chart to monitor the infection progress rate
final XYLineChart chart =
new XYLineChart("Infection Rate", 5.0, "Infected Nodes (%)", "time(s)");
chart.setYRange(false, 0, 100);
chart.setSeriesLinesAndShapes("s0", true, true);
Gui.setFrameRectangle("MainFrame", 0, 0, 480, 480);
Gui.setFrameRectangle("Infection Rate", 484, 0, 480, 480);
// Create the simulation nodes
for (int i = 0; i < TOTAL_NODES; i++) new Node();
// Initialize the simulation nodes
for (Node i : NodeDB.nodes()) i.init();
NodeDB.randomNode().infect();
// Sets up a periodic task that, at one second intervals, computes and shows the percentage of
// infected nodes in the system
// Stops the simulation when it detects that every node is infected...
new PeriodicTask(1.0) {
public void run() {
double T = 0, N = 0;
for (Node n : NodeDB.nodes()) {
if (n.infected) T++;
N++;
}
chart.getSeries("s0").add(Simulation.currentTime(), 100.0 * T / N);
if (N == T) stop();
};
};
// From time to time, select a random node to go fail and go offline...
new Task(0) {
public void run() {
NodeDB.randomNode().crash();
reSchedule(0.5 + 0.5 * rg.nextDouble()); // schedules a new execution of this task...
}
};
// From time to time, create a new node. If the rate of births and deaths is the same,
// the size of the system should stay constant on average.
new Task(0) {
public void run() {
new Node().init();
reSchedule(0.5 + 0.5 * rg.nextDouble()); // schedules a new execution of this task...
}
};
super.setSimulationMaxTimeWarp(2.0);
return this;
}
public void start() {
nodes.addAll(readNodes);
nodes.addAll(taskNodes);
nodes.addAll(writerNodes);
for (Node node : nodes) {
node.init();
node.pre();
}
for (ReadNode readNode : readNodes) {
readNode.start();
}
}
/**
* Obtain a new Node randomly chosen from the given list. The Node is cloned and initialized, so
* it can be used separatedly
*
* @param l The list of Nodes from which to choose
* @param currentGlobalDepth The depth of the requested Node in the Tree
*/
public Node newRandomNode(List<Node> l, int currentGlobalDepth) {
int which = Common.globalRandom.nextInt(l.size());
Node outNode = null;
try {
outNode = (Node) l.get(which).clone();
}
/* This should never happen, as nodes do support cloning, so it's ok
* to catch this exception here
*/
catch (CloneNotSupportedException e) {
Logger.log(e);
}
outNode.init(config, problemData);
outNode.setCurrentDepth(currentGlobalDepth);
return outNode;
}
static Node alloc() {
final int threshold = 2;
int tryCnt = 0;
while (true) {
tryCnt++;
Node n = pool.poll();
if (n == null) {
return new Node();
} else {
if (n.getRefCnt() > 0) {
pool.add(n);
if (tryCnt <= threshold) continue;
else return new Node();
} else {
if (n.next != null) n.next.decRefCnt();
n.init();
return n;
}
}
}
}
