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copied!<p>You need to implement the <a href="http://docs.oracle.com/javaee/6/api/javax/faces/event/PhaseListener.html" rel="noreferrer"><code>PhaseListener</code></a> interface and hook on <a href="http://docs.oracle.com/javaee/6/api/javax/faces/event/PhaseListener.html#beforePhase%28javax.faces.event.PhaseEvent%29" rel="noreferrer"><code>beforePhase()</code></a> of the <a href="http://docs.oracle.com/javaee/6/api/javax/faces/event/PhaseId.html#RENDER_RESPONSE" rel="noreferrer"><code>PhaseId_RENDER_RESPONSE</code></a>. The render response is the last phase of the JSF lifecycle.</p> <pre class="lang-java prettyprint-override"><code>public class MyPhaseListener implements PhaseListener { @Override public PhaseId getPhaseId() { return PhaseId.RENDER_RESPONSE; } @Override public void beforePhase(PhaseEvent event) { // Do your job here which should run right before the RENDER_RESPONSE. } @Override public void afterPhase(PhaseEvent event) { // Do your job here which should run right after the RENDER_RESPONSE. } } </code></pre> <p>To get it to run, register it as follows in <code>faces-config.xml</code>:</p> <pre class="lang-xml prettyprint-override"><code><lifecycle> <phase-listener>com.example.MyPhaseListener</phase-listener> </lifecycle> </code></pre> <hr> <p><strong>Update</strong> the above phase listener is indeed applicaiton-wide. To have a phase listener for a specific view, use the <code>beforePhase</code> and/or <code>afterPhase</code> attributes of the <a href="http://download.oracle.com/javaee/6/javaserverfaces/2.1/docs/vdldocs/facelets/f/view.html" rel="noreferrer"><code><f:view></code></a>.</p> <p>E.g.</p> <pre class="lang-html prettyprint-override"><code><f:view beforePhase="#{bean.beforePhase}"> ... </f:view> </code></pre> <p>with</p> <pre><code>public void beforePhase(PhaseEvent event) { if (event.getPhaseId() == PhaseId.RENDER_RESPONSE) { // Do here your job which should run right before the RENDER_RESPONSE. } } </code></pre> <p>A more JSF 2.0 way is by the way using the <a href="http://download.oracle.com/javaee/6/javaserverfaces/2.1/docs/vdldocs/facelets/f/event.html" rel="noreferrer"><code><f:event type="preRenderView"></code></a>:</p> <pre class="lang-html prettyprint-override"><code><f:event type="preRenderView" listener="#{bean.preRenderView}" /> </code></pre> <p>with</p> <pre><code>public void preRenderView() { // Do here your job which should run right before the RENDER_RESPONSE. } </code></pre>

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