/**
* Updates the data set for both charts with the contents of the supplied Hashtable. The Hashtable
* is expected to contain the following items:
*
* <ul>
* <li>down - The number of links currently in a down state
* <li>up - The number of links currently in an up state
* <li>unknown - The number of links currently in an unknown state
* </ul>
*
* @param linkStats The hashtable containing the entries indicating current link statistics.
*/
public void updateData(Hashtable<String, Integer> linkStats) {
dpdCurrentData.insertValue(0, "Link Down", linkStats.get("down"));
dpdCurrentData.insertValue(1, "Link Up", linkStats.get("up"));
dpdCurrentData.insertValue(2, "Link State Unknown", linkStats.get("unknown"));
dcdPreviousData.addValue(
linkStats.get("down"), "Link Down", Calendar.getInstance().getTime().toString());
dcdPreviousData.addValue(
linkStats.get("up"), "Link Up", Calendar.getInstance().getTime().toString());
dcdPreviousData.addValue(
linkStats.get("unknown"),
"Link State Unknown",
Calendar.getInstance().getTime().toString());
}
protected void update() {
// We have to rebuild the dataset from scratch (deleting and replacing it) because JFreeChart's
// piechart facility doesn't have a way to move series. Just like the histogram system: stupid
// stupid stupid.
SeriesAttributes[] sa = getSeriesAttributes();
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
for (int i = 0; i < sa.length; i++)
if (sa[i].isPlotVisible()) {
PieChartSeriesAttributes attributes = (PieChartSeriesAttributes) (sa[i]);
Object[] elements = attributes.getElements();
double[] values = null;
String[] labels = null;
if (elements != null) {
HashMap map = convertIntoAmountsAndLabels(elements);
labels = revisedLabels(map);
values = amounts(map, labels);
} else {
values = attributes.getValues();
labels = attributes.getLabels();
}
UniqueString seriesName = new UniqueString(attributes.getSeriesName());
for (int j = 0; j < values.length; j++)
dataset.addValue(values[j], labels[j], seriesName); // ugh
}
setSeriesDataset(dataset);
}
/**
* Initialises the class and internal logger. Uses the supplied arguments to receive data from the
* application and add data to the charts dynamically.
*
* @param title The title of the charts on display. Whether the displayed data is for <code>new
* </code> or <code>old</code> links. That is whether the data is for newly discovered links
* or existing (old) links already stored within the database.
* @param parent The instance of <code>COMPortClient</code> that acts as the data source for the
* charts.
*/
public LinkChart(String title, COMPortClient parent) {
super("Charts", true, true, true, true);
super.setLayer(1);
identifier = title.toLowerCase();
// Obtain an instance of Logger for the class
log = LoggerFactory.getLogger(className);
owner = parent;
// Setup a hashtable to hold the values for up, down and unknown link states
Hashtable<String, Integer> linkStats = new Hashtable<String, Integer>();
if (identifier.equals("old")) {
this.setTitle("Recognised Link Status on " + owner.getPortName() + ":");
// Get the current figures from the link table
linkStats = ((LinkTable) owner.getLinkTable().getModel()).getInitialFigures();
} else if (identifier.equals("new")) {
this.setTitle("Discovered Link Status on " + owner.getPortName() + ":");
linkStats = ((LinkTable) owner.getNewLinkTable().getModel()).getInitialFigures();
} else {
// If the identifier was set to something other than old or new then it's not right.
log.warning("An instance of LinkChart has been created for an unknown purpose.");
return;
}
// Initialise the dataset for the pie chart
dpdCurrentData = new DefaultPieDataset();
dpdCurrentData.insertValue(0, "Link Down", linkStats.get("down"));
dpdCurrentData.insertValue(1, "Link Up", linkStats.get("up"));
dpdCurrentData.insertValue(2, "Link State Unknown", linkStats.get("unknown"));
// Initialise the dataset for the line chart
dcdPreviousData = new DefaultCategoryDataset();
dcdPreviousData.addValue(
linkStats.get("down"), "Link Down", Calendar.getInstance().getTime().toString());
dcdPreviousData.addValue(
linkStats.get("up"), "Link Up", Calendar.getInstance().getTime().toString());
dcdPreviousData.addValue(
linkStats.get("unknown"),
"Link State Unknown",
Calendar.getInstance().getTime().toString());
// Set the variables we need for holding the charts
JFreeChart jfcCurrentStatus; // This will be displayed as a pie chart
JFreeChart jfcPreviousStatus; // This will be displayed as a line chart
ChartPanel cpCurrent; // Chartpanels hold the JFreeChart
ChartPanel cpPrevious;
// Use the factory to create the charts
jfcCurrentStatus =
ChartFactory.createPieChart("Current Status", dpdCurrentData, true, true, false);
jfcPreviousStatus =
ChartFactory.createLineChart(
"Previous Status",
"Time received",
"Number of Links",
dcdPreviousData,
PlotOrientation.VERTICAL,
true,
true,
false);
// Add them to the chart panels
cpCurrent = new ChartPanel(jfcCurrentStatus);
cpPrevious = new ChartPanel(jfcPreviousStatus);
// Add the chart panels to the content pane
this.add(cpCurrent, BorderLayout.EAST);
this.add(cpPrevious, BorderLayout.WEST);
// Change the layout to show them next to each other
this.setLayout(new GridLayout(1, 2));
// Add a listener to the window
this.addInternalFrameListener(new CloseLinkChart(this));
log.finest("Adding frame to the desktop");
// Set the window properties and display it
Client.getJNWindow().addToDesktop(this);
this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
this.setSize(650, 400);
this.setVisible(true);
owner.addChartWindow(title, this);
}