Mercurial > dive4elements > river
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> |
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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()); } } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :