Added a filter to add variables to requests (GA)

src/main/java/org/genesys2/server/servlet/filter/EnvVariablesFilter.java

+/**
+ * Copyright 2013 Global Crop Diversity Trust
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ **/
+
+package org.genesys2.server.servlet.filter;
+
+import java.io.IOException;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.lang.StringUtils;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+@Component("envVarFilter")
+public class EnvVariablesFilter extends OncePerRequestFilter {
+
+	@Value("${google.analytics.account}")
+	private String googleAnalyticsAccount;
+
+	@Override
+	protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
+
+		if (StringUtils.isNotBlank(googleAnalyticsAccount)) {
+			request.setAttribute("googleAnalyticsAccount", googleAnalyticsAccount);
+		}
+
+		filterChain.doFilter(request, response);
+	}
+
+}
\ No newline at end of file

src/main/resources/spring/servlet.xml

@@ -45,7 +45,7 @@
     <mvc:default-servlet-handler/>
 
     <!--Controllers-->
-    <context:component-scan base-package="org.genesys2.server.servlet.controller"/>
+    <context:component-scan base-package="org.genesys2.server.servlet.filter,org.genesys2.server.servlet.controller" />
 
     <aop:aspectj-autoproxy/>
 

src/main/webapp/WEB-INF/decorator/footer.jsp

@@ -29,6 +29,19 @@
 	</div>
 </div>
 
+<c:if test="${googleAnalyticsAccount ne null}">
+<script type="text/javascript">
+  var _gaq = _gaq || [];
+  _gaq.push(['_setAccount', '${googleAnalyticsAccount}']);
+  _gaq.push(['_trackPageview']);
+
+  (function() {
+    var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+  })();
+</script>
+</c:if>
 
 <!-- Processing time:
 <div class="footer clearfix" style="font-size: 80%"><spring:message code="page.rendertime" arguments="${springExecuteTime}" /></div>

src/main/webapp/WEB-INF/web.xml

@@ -42,6 +42,16 @@
         <filter-name>org.springframework.security.filterChainProxy</filter-name>
         <url-pattern>/*</url-pattern>
     </filter-mapping>
+    
+	<filter>
+        <filter-name>envVarFilter</filter-name>
+        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
+        <description>Adds variables to all requests</description>
+    </filter>
+    <filter-mapping>
+        <filter-name>envVarFilter</filter-name>
+        <url-pattern>/*</url-pattern>
+    </filter-mapping>
 	
 	<filter>
 		<filter-name>sitemesh</filter-name>