[richfaces-issues] [JBoss JIRA] (RF-12072) Lost event in push
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https://issues.jboss.org/browse/RF-12072?page=com.atlassian.jira.plugin.s...
]
Stian Thorgersen commented on RF-12072:
---------------------------------------
{quote}
Hey Stian, any chance you could look into fixing the issue the proposed way ^ ?
{quote}
Are you talking about the workaround or queueing requests?
I think the best solution is the subscribed event, as the other solution of queueing
requests sounds fairly complex + as you say it doesn't eliminate the problem.
Lost event in push
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Key: RF-12072
URL: https://issues.jboss.org/browse/RF-12072
Project: RichFaces
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: component-push/poll
Reporter: Stian Thorgersen
Assignee: Lukáš Fryč
Fix For: 4.2.1.CR1
Event can be lost if produced while a response is being prepared. I've attached an
example where a push event is used to refresh a count whenever an event is fired. It's
using Thread.sleep to simulate an event being produced while the response is being
prepared. Note, if the sleep just before returning the count is removed it all works fine,
and the page is refreshed every 5 seconds, but with the sleep in place the event is lost.
View:
{code}
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-GB"
lang="en-GB"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:a4j="http://richfaces.org/a4j"
xmlns:rich="http://richfaces.org/rich">
<h:head>
<meta http-equiv="Content-Type" content="text/html;
charset=UTF-8" />
</h:head>
<h:body>
<h:form id="myForm">
<a4j:push address="chat">
<a4j:ajax event="dataavailable" render="count" />
</a4j:push>
<h:outputText value="#{myBean.count}" id="count" />
</h:form>
</h:body>
</html>
{code}
Bean:
{code}
package com.example;
import java.io.Serializable;
import java.util.concurrent.atomic.AtomicInteger;
import javax.enterprise.context.SessionScoped;
import javax.inject.Named;
import org.richfaces.application.push.TopicKey;
import org.richfaces.application.push.TopicsContext;
@Named
@SessionScoped
public class MyBean implements Serializable
{
private AtomicInteger count = new AtomicInteger();
public int getCount()
{
int c = count.get();
new Thread()
{
public void run()
{
try
{
Thread.sleep(5000);
count.incrementAndGet();
TopicKey topicKey = new TopicKey("chat");
TopicsContext topicsContext = TopicsContext.lookup();
topicsContext.publish(topicKey, "");
}
catch (Exception e)
{
e.printStackTrace();
}
};
}.start();
try
{
Thread.sleep(10000);
}
catch (InterruptedException e)
{
}
return c;
}
}
{code}
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