resources concat and minify in production

src/main/java/com/commafeed/frontend/resources/UserCustomCssReference.java

@@ -0,0 +1,39 @@
+package com.commafeed.frontend.resources;
+
+import java.io.IOException;
+
+import org.apache.commons.lang.StringUtils;
+import org.apache.wicket.request.resource.AbstractResource;
+import org.apache.wicket.request.resource.IResource;
+import org.apache.wicket.request.resource.ResourceReference;
+
+@SuppressWarnings("serial")
+public abstract class UserCustomCssReference extends ResourceReference {
+
+	public UserCustomCssReference() {
+		super(UserCustomCssReference.class, "custom.css");
+	}
+
+	@Override
+	public IResource getResource() {
+		return new AbstractResource() {
+			@Override
+			protected ResourceResponse newResourceResponse(Attributes attributes) {
+				ResourceResponse resourceResponse = new ResourceResponse();
+				resourceResponse.setContentType("text/css");
+				resourceResponse.setTextEncoding("UTF-8");
+				resourceResponse.setWriteCallback(new WriteCallback() {
+					@Override
+					public void writeData(Attributes attributes)
+							throws IOException {
+						attributes.getResponse().write(
+								StringUtils.trimToEmpty(getCss()));
+					}
+				});
+				return resourceResponse;
+			}
+		};
+	}
+
+	protected abstract String getCss();
+}

src/main/java/com/commafeed/frontend/resources/WroListener.java

@@ -0,0 +1,22 @@
+package com.commafeed.frontend.resources;
+
+import java.util.ResourceBundle;
+
+import ro.isdc.wro.config.jmx.WroConfiguration;
+import ro.isdc.wro.http.WroServletContextListener;
+
+public class WroListener extends WroServletContextListener {
+
+	@Override
+	protected WroConfiguration newConfiguration() {
+		WroConfiguration conf = super.newConfiguration();
+
+		boolean prod = Boolean.valueOf(ResourceBundle.getBundle("application")
+				.getString("production"));
+
+		conf.setDisableCache(prod);
+		conf.setDebug(!prod);
+		return conf;
+	}
+
+}