view flys-artifacts/src/main/java/de/intevation/flys/jfree/StyledXYSeries.java @ 5779:ebec12def170

Datacage: Add a pool of builders to make it multi threadable. XML DOM is not thread safe. Therefore the old implementation only allowed one thread to use the builder at a time. As the complexity of the configuration has increased over time this has become a bottleneck of the whole application because it took quiet some time to build a result. Furthermore the builder code path is visited very frequent. So many concurrent requests were piled up resulting in long waits for the users. To mitigate this problem a round robin pool of builders is used now. Each of the pooled builders has an independent copy of the XML template and can be run in parallel. The number of builders is determined by the system property 'flys.datacage.pool.size'. It defaults to 4.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 21 Apr 2013 12:48:09 +0200
parents 0f7abd95c6e2
children
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package de.intevation.flys.jfree;

import java.util.List;

import org.apache.log4j.Logger;

import org.w3c.dom.Document;

import org.jfree.data.xy.XYDataItem;
import org.jfree.data.xy.XYSeries;

/**
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class StyledXYSeries extends XYSeries implements StyledSeries, HasLabel {

    private static final Logger logger = Logger.getLogger(StyledXYSeries.class);

    protected Style style;

    /** If this Series is to be labelled, use this String as label. */
    protected String label;


    public StyledXYSeries(String key, Document theme) {
        this(key, true, theme);
        this.label = key.toString();
    }


    public StyledXYSeries(String key, Document theme, XYSeries unstyledSeries) {
        this(key, theme);
        add(unstyledSeries);
    }


    /**
     * @param sorted whether or not to sort the points. Sorting will move NANs
     *               to one extrema which can cause problems in certain
     *               algorithms.
     */
    public StyledXYSeries(String key, boolean sorted, Document theme) {
        super(key, sorted);
        setStyle(new XYStyle(theme));
        this.label = key.toString();
    }


    @Override
    public void setStyle(Style style) {
        this.style = style;
    }


    @Override
    public Style getStyle() {
        return style;
    }


    @Override
    public String getLabel() {
        return label;
    }

    @Override
    public void setLabel(String label) {
        this.label = label;
    }

    protected void add(XYSeries series) {
        List<XYDataItem> items = series.getItems();
        add(items);
    }

    protected void add(List<XYDataItem> items) {
        for(XYDataItem item : items) {
            add(item.getXValue(), item.getYValue());
        }
    }
}
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