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[utils] / wicket / components / src / main / java / org / wamblee / wicket / behavior / WebApplicationBasePage.java

diff --git a/wicket/components/src/main/java/org/wamblee/wicket/behavior/WebApplicationBasePage.java b/wicket/components/src/main/java/org/wamblee/wicket/behavior/WebApplicationBasePage.java
index 9b89818c539eea7083edbd4cf114f15bbe20cbea..6770b91a71680a6eac1e2432f9e866d5676e649e 100644 (file)
--- a/wicket/components/src/main/java/org/wamblee/wicket/behavior/WebApplicationBasePage.java
+++ b/wicket/components/src/main/java/org/wamblee/wicket/behavior/WebApplicationBasePage.java
@@ -15,46 +15,111 @@
  */
 package org.wamblee.wicket.behavior;
 
+import javax.persistence.EntityManager;
+
 import org.apache.wicket.IPageMap;
 import org.apache.wicket.PageParameters;
 import org.apache.wicket.markup.html.WebPage;
 import org.apache.wicket.model.IModel;
+import org.apache.wicket.protocol.http.WebResponse;
 
 /**
  * Base page for wicket applications that allows customization of various bahaviors of the 
  * page. This page has no associated markup. 
  * 
+ * The utility methods {@link #disableCaching()}, {@link #expireImmediately()}, 
+ * and {@link #flushEntityManagerAfterRender(EntityManager)} are provide for quicly adding 
+ * behaviors. Alternatively, the method {@link #addBehavior(PageBehavior)} can be used. 
+ * 
  * @author Erik Brakkee
  *
  */
 public class WebApplicationBasePage extends WebPage {
     
+    private CompositePageBehavior behaviors;
+    
     protected WebApplicationBasePage() { 
         super();
+        init();
     }
     
     protected WebApplicationBasePage(final IModel<?> model)
     {
         super(model);
+        init();
     }
 
     protected WebApplicationBasePage(final IPageMap pageMap)
     {
         super(pageMap);
+        init();
     }
     
     protected WebApplicationBasePage(final IPageMap pageMap, final IModel<?> model)
     {
         super(pageMap, model);
+        init();
     }
 
     protected WebApplicationBasePage(final PageParameters parameters)
     {
         super(parameters);
+        init();
     }
 
     protected WebApplicationBasePage(final IPageMap pageMap, final PageParameters parameters)
     {
         super(pageMap, parameters);
+        init();
+    }
+    
+    private void init() { 
+        behaviors = new CompositePageBehavior(); 
+    }
+    
+    /**
+     * Disables caching. This implies expiry of the page from the page map. 
+     */
+    protected void disableCaching() { 
+        addBehavior(new DisableCachingBehavior());
+    }
+    
+    /**
+     * Expires the page immediately. Refresh in the browser will lead to an expired page. 
+     */
+    protected void expireImmediately() { 
+        addBehavior(new ExpirePageImmediatelyBehavior());
+    }
+    
+    /**
+     * Flushes the entitymanager immedately after rendering to make sure that errors are
+     * caught early. 
+     * @param aEntityManager Contextual reference to an entity manager. 
+     */
+    protected void flushEntityManagerAfterRender(EntityManager aEntityManager) { 
+        addBehavior(new FlushEntityManagerBehavior(aEntityManager));
+    }
+    
+    
+    public void addBehavior(PageBehavior aBehavior) { 
+        behaviors.add(aBehavior);
+    }
+    
+    @Override
+    protected void onBeforeRender() {
+        behaviors.onBeforeRender(this);
+        super.onBeforeRender();
+    }
+    
+    @Override
+    protected void setHeaders(WebResponse aResponse) {
+        super.setHeaders(aResponse);
+        behaviors.setHeaders(this, aResponse);
+    }
+    
+    @Override
+    protected void onAfterRender() {
+        super.onAfterRender();
+        behaviors.onAfterRender(this);
     }
 }