view flys-artifacts/src/main/java/de/intevation/flys/exports/VisibleAttribute.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 58bdf95df5e4
children
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package de.intevation.flys.exports;

import org.w3c.dom.Element;
import org.w3c.dom.Node;

import de.intevation.artifactdatabase.state.DefaultAttribute;


/**
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class VisibleAttribute extends DefaultAttribute {

    protected boolean visible;


    public VisibleAttribute(String name, Object value, boolean visible) {
        super(name, value);
        this.visible = visible;
    }


    /**
     * This implementation of Attribute calls DefaultAttribute.toXML() first.
     * After this, a new Attr <i>display</i> is added to the resulting Node.
     *
     * @param parent The parent Node.
     *
     * @return a new Node that represents this Attribute.
     */
    @Override
    public Node toXML(Node parent) {
        Element ele = (Element) super.toXML(parent);
        ele.setAttribute("display", String.valueOf(visible));

        return ele;
    }
}
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