Example usage for org.jfree.chart.servlet ChartDeleter addChart

Introduction

In this page you can find the example usage for org.jfree.chart.servlet ChartDeleter addChart.

Prototype

public void addChart(String filename) 

Source Link

Document

Add a chart to be deleted when the session expires

Usage

From source file:com.portalbook.charting.PortletUtilities.java

/**
 * Adds a ChartDeleter object to the session object with the name JFreeChart_Deleter
 * if there is not already one bound to the session and adds the filename to the
 * list of charts to be deleted./*from ww w .  j a v  a2  s.  c  om*/
 *
 * @param tempFile  the file to be deleted.
 * @param session  the portlet session of the client.
 */
protected static void registerChartForDeletion(File tempFile, PortletSession session) {

    //  Add chart to deletion list in session
    if (session != null) {
        ChartDeleter chartDeleter = (ChartDeleter) session.getAttribute("JFreeChart_Deleter",
                PortletSession.APPLICATION_SCOPE);
        if (chartDeleter == null) {
            chartDeleter = new ChartDeleter();
            session.setAttribute("JFreeChart_Deleter", chartDeleter, PortletSession.APPLICATION_SCOPE);
        }
        chartDeleter.addChart(tempFile.getName());
        System.out.println(tempFile.getName());
    } else {
        System.out.println("Session is null - chart will not be deleted");
    }
}

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