view flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeField.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 b36fd8f21e6a
children
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package de.intevation.flys.themes;

import org.w3c.dom.Document;


/**
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public interface ThemeField {

    /**
     * Returns the name of this field.
     *
     * @return the name of this field.
     */
    String getName();

    /**
     * Returns the type of this field.
     *
     * @return the type of this field.
     */
    String getType();


    /**
     * Returns the value of this field.
     *
     * @return the value of this field.
     */
    Object getValue();


    /**
     * Changes the value of this field.
     *
     * @param value The new value.
     */
    void setValue(Object value);


    /**
     * Sets the value of an attribute.
     *
     * @param name The name of an attribute.
     * @param value The value of an attribute.
     */
    void setAttribute(String name, Object value);


    /**
     * Dumps the field to XML.
     *
     * @return a document.
     */
    Document toXML();
}
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