GoogleAnalytics as a jsp-tag

google-analytics.xml

<?xml version="1.0" encoding="ISO-8859-1"?>

<taglib xmlns="http://java.sun.com/xml/ns/javaee"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd"
        version="2.1">

    <tlib-version>1.0</tlib-version>
    <short-name>googleAnalytics</short-name>
    <uri>https://storm.ipc.be</uri>
    <tag>
        <name>googleAnalytics</name>
        <tag-class>be.ipc.storm.common.tags.GoogleAnalyticsHandler</tag-class>
        <body-content>empty</body-content>
    </tag>


    <!-- Invoke 'Generate' action to add tags or functions -->

</taglib>

GoogleAnalyticshandler.java

package be.ipc.storm.common.tags;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;
import java.io.IOException;
import java.util.Properties;

/**
 * Created by Davy van Roy.
 * Date: 06/06/12
 * Time: 11:38
 */
public class GoogleAnalyticsHandler extends TagSupport {
    private static final String ACCOUNT_ID = "UA-32402572-1";
    private static final boolean ANALYTICS_ENABLED;

    @Override
    public int doStartTag() throws JspException {
        StringBuilder html = new StringBuilder();
        if (ANALYTICS_ENABLED) {
            html.append("<script type=\"text/javascript\">\n" +
                    "\n" +
                    "          var _gaq = _gaq || [];\n" +
                    "          _gaq.push(['_setAccount', '" + ACCOUNT_ID + "']);\n" +
                    "          _gaq.push(['_setDomainName', 'ipc.be']);\n" +
                    "          _gaq.push(['_trackPageview']);\n" +
                    "\n" +
                    "          (function() {\n" +
                    "            var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;\n" +
                    "            ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';\n" +
                    "            var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);\n" +
                    "          })();\n" +
                    "\n" +
                    "        </script>");
        }
        JspWriter out = this.pageContext.getOut();
        try {
            out.print(html);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return TagSupport.SKIP_BODY;
    }

    static {
        Properties PROPERTIES = null;
        try {
            PROPERTIES = new Properties();
            PROPERTIES.load(Thread.currentThread().getContextClassLoader().getResourceAsStream("storm.properties"));

        } catch (IOException e) {
            e.printStackTrace();
        }
        ANALYTICS_ENABLED = PROPERTIES.get("google.analytics.enabled") == null ? false : Boolean.valueOf((String) PROPERTIES.get("google.analytics.enabled"));
    }

}

randompage.jsp

-- include --
<%@taglib prefix="google" uri="/WEB-INF/google-analytics-tag.tld" %>

-- usage --    
<google:googleAnalytics/>