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    <p>Your <code>web.xml</code> is missing the "URL Configuration" part of PrimeFaces Push setup.</p> <p>As mentioned in my answer on your <a href="https://stackoverflow.com/questions/10758147/a-two-user-tic-tac-toe-using-jsf">previous question</a>, Installation details of PrimeFaces Push are outlined in chapter 6 of PrimeFaces <a href="http://www.primefaces.org/documentation.html" rel="nofollow noreferrer">User's Guide</a>. Here's an extract of relevance for the step you're missing:</p> <blockquote> <h1>6.1 Setup</h1> <h3>Push Server</h3> <p>PrimeFaces Push uses a servlet as a dispatcher. This servlet should be in a different application than the JSF application and at the moment can only be deployed on jetty server.</p> <pre class="lang-xml prettyprint-override"><code>&lt;servlet&gt; &lt;servlet-name&gt;Push Servlet&lt;/servlet-name&gt; &lt;servlet-class&gt;org.primefaces.push.PushServlet&lt;/servlet-class&gt; &lt;load-on-startup&gt;1&lt;/load-on-startup&gt; &lt;init-param&gt; &lt;param-name&gt;channels&lt;/param-name&gt; &lt;param-value&gt;chat,counter&lt;/param-value&gt; &lt;/init-param&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;Push Servlet&lt;/servlet-name&gt; &lt;url-pattern&gt;/prime-push/*&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; </code></pre> <p>channels configuration defines the topic names that push server can publish to.</p> <h3>URL Configuration</h3> <p>The JSF application needs to define the push server url to send messages.</p> <pre class="lang-xml prettyprint-override"><code>&lt;context-param&gt; &lt;param-name&gt;primefaces.PUSH_SERVER_URL&lt;/param-name&gt; &lt;param-value&gt;ws://url_to_push_server&lt;/param-value&gt; &lt;/context-param&gt; </code></pre> </blockquote>
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    1. POPrimefaces JSF null returned from RequestContext.getCurrentInstance()
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    1. COIt seems though that it can only be deployed on Jetty server, which pretty much makes the whole solution useless for me since I have to run it on Tomcat. Thanks anyway :)
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    2. COPerhaps you didn't understand that you're supposed to run them next each other? Jetty is solely supposed to handle push, you can just keep Tomcat running for your webapp. Because, as explained in my answer on your previous question, there is no single standard to handle push, PrimeFaces has just choosen Jetty as reference server for push, otherwise it'd be a total waste of time to write push logic for every single server which exist nowadays (Tomcat, Jetty, Glassfish, Weblogic, Websphere, JBoss, etc..etc..). Jetty was chosen because it's so small and has good native websockets support.
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    3. COSo, if I understand it correctly, I should create a new Eclipse project just for the Servlet, modify only its web.xml and then run it on Jetty? And then, in my old application in web.xml add the primefaces.PUSH_SERVER_URL declaration? I'll try that in a moment, but first I have to install Jetty.
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