view flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeAccess.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 0b9b2a0c4e64
children
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package de.intevation.flys.themes;

import de.intevation.flys.utils.ThemeUtil;

import java.awt.Color;
import java.awt.Font;

import org.w3c.dom.Document;


public class ThemeAccess
{
    protected Document theme;

    protected Integer lineWidth;

    protected Color   lineColor;
    protected Color   textColor;
    protected Font    font;
    protected String  textOrientation;
    protected Color   textBackground;
    protected Boolean showTextBackground;
    protected Color   pointColor;


    public ThemeAccess(Document theme) {
        this.theme = theme;
    }


    public int parseLineWidth() {
        if (lineWidth == null) {
            lineWidth = ThemeUtil.parseLineWidth(theme);
        }
        return lineWidth;
    }


    public Color parseLineColorField() {
        if (lineColor == null) {
            lineColor = ThemeUtil.parseLineColorField(theme);
            if (lineColor == null) {
                lineColor = Color.BLACK;
            }
        }
        return lineColor;
    }


    public Color parseTextColor() {
        if (textColor == null) {
            textColor = ThemeUtil.parseTextColor(theme);
            if (textColor == null) {
                textColor = Color.BLACK;
            }
        }
        return textColor;
    }


    public Font parseTextFont() {
        if (font == null) {
            font = ThemeUtil.parseTextFont(theme);
            if (font == null) {
                font = new Font("Arial", Font.BOLD, 10);
            }
        }
        return font;
    }


    public String parseTextOrientation() {
        if (textOrientation == null) {
            textOrientation = ThemeUtil.parseTextOrientation(theme);
        }
        return textOrientation;
    }


    public Color parseTextBackground() {
        if (textBackground == null) {
            textBackground = ThemeUtil.parseTextBackground(theme);
            if (textBackground == null) {
                textBackground = Color.WHITE;
            }
        }
        return textBackground;
    }

    public boolean parseLabelShowBackground() {
        if (showTextBackground == null) {
            showTextBackground = ThemeUtil.parseLabelShowBackground(theme);
        }
        return showTextBackground;
    }


    public Color parsePointColor() {
        if (pointColor == null) {
            pointColor = ThemeUtil.parsePointColor(theme);

            if (pointColor == null) {
                return parseLineColorField();
            }
        }

        return pointColor;
    }


    public LineStyle parseLineStyle() {
        return new LineStyle(parseLineColorField(), Integer.valueOf(parseLineWidth()));
    }

    public TextStyle parseTextStyle() {
        return new TextStyle(
            parseTextColor(),
            parseTextFont(),
            parseTextBackground(),
            parseLabelShowBackground(),
            !parseTextOrientation().equals("horizontal"));
    }
}
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