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POOrder of execution of f:event causing exception
 

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    <p>I am trying to run f:event when the page loads. <code>f:event</code> is associated with the backing bean function <code>init()</code>. The <code>init()</code> creates the session object <code>toIndex</code> which is used in the <code>getStatusList()</code> function. But the problem that I am facing is that the <code>getStatusList()</code> funciton is executed first and hence it cannot find the <code>toIndex</code> session object,and its giving me a null pointer exception. The <code>init()</code> function is never called. The <code>StatusBean</code> is session scoped.</p> <p>1)xhtml</p> <pre><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:p="http://primefaces.org/ui" xmlns:c="http://java.sun.com/jsp/jstl/core"&gt; &lt;f:view&gt; &lt;f:event type="postAddToView" listener="#{statusBean.init}" &gt;&lt;/f:event&gt; &lt;/f:view&gt; &lt;h:head&gt;&lt;/h:head&gt; &lt;h:body&gt; &lt;c:forEach var="p" items="#{statusBean.statusList}" varStatus="loop"&gt; //content &lt;/c:forEach&gt; &lt;/h:body&gt; &lt;/html&gt; </code></pre> <p>2) Backing bean</p> <pre><code>public class StatusBean { public List&lt;Status&gt; getStatusList() { FacesContext context = FacesContext.getCurrentInstance(); HttpSession session = (HttpSession) context.getExternalContext() .getSession(true); User user = (User) session.getAttribute("userdet"); Query query = em.createQuery("SELECT s FROM Status s WHERE s.email='" + user.getEmail() + "' ORDER BY s.timeMillis desc", Status.class); List&lt;Status&gt; results = query.getResultList(); Collections.sort(results); int toIndex = (int) session.getAttribute("toIndex"); List&lt;Status&gt; subList = results.subList(0, toIndex); return subList; } public void init(ComponentSystemEvent event) { System.out.println("inside init"); FacesContext context = FacesContext.getCurrentInstance(); HttpSession session = (HttpSession) context.getExternalContext().getSession(true); int toIndex = 5; session.setAttribute("toIndex",toIndex); } } </code></pre>
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