/**
* 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());
}
public static String getSimplePieChart(Map dataSource, String objectName, HttpSession session)
throws Throwable {
DefaultPieDataset dataset = new DefaultPieDataset();
Element chartObject =
XMLHandler.getElementByAttribute(getChartObjectList(), "name", objectName);
String title = chartObject.getAttributeValue("title");
int width = Integer.parseInt(chartObject.getAttributeValue("width"));
int height = Integer.parseInt(chartObject.getAttributeValue("height"));
Element LabelKeys = chartObject.getChild("Labels");
Element ValueKeys = chartObject.getChild("Values");
String valueKey = ValueKeys.getText();
String valueType = ValueKeys.getAttributeValue("type");
List labelKeys = LabelKeys.getChildren("Label");
String labelKey = LabelKeys.getText();
if (valueType.equalsIgnoreCase("number")) {
for (int i = 0; i < dataSource.size(); i++) {
Map rec = (Map) dataSource.get("ROW" + i);
Number value = (Number) rec.get(valueKey);
String label;
if (labelKeys.isEmpty()) {
label = DataFilter.show(rec, labelKey);
} else {
label = ((Element) labelKeys.get(i)).getText();
}
dataset.setValue(label, value);
}
} else {
for (int i = 0; i < dataSource.size(); i++) {
Map rec = (Map) dataSource.get("ROW" + i);
double value = (Double) rec.get(valueKey);
String label;
if (labelKeys.isEmpty()) {
label = DataFilter.show(rec, labelKey);
} else {
label = ((Element) labelKeys.get(i)).getText();
}
dataset.setValue(label, value);
}
}
JFreeChart chart =
ChartFactory.createPieChart3D(
title,
dataset,
chartObject.getAttribute("showLegend").getBooleanValue(),
chartObject.getAttribute("showToolTips").getBooleanValue(),
chartObject.getAttribute("urls").getBooleanValue());
PiePlot3D pie3dplot = (PiePlot3D) chart.getPlot();
float alpha = 0.7F;
if (chartObject.getAttribute("alpha") != null) {
alpha = chartObject.getAttribute("alpha").getFloatValue();
}
pie3dplot.setForegroundAlpha(alpha);
return ServletUtilities.saveChartAsPNG(chart, width, height, null, session);
}
/**
* 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);
}