Refreshing the portlet at certain intervals in liferay

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In our Project we have requirement to refresh the portlet at certain interval of times.

Thanks to liferay we have utility method to get the refreshURL.

Have a look into the PortletURLUtil class. we have getRefreshURL(---....)  method to the current portlet URL.

So we have used in the following way in the jsp. As already we know "request" and "themeDisplay" Objects are predefined objects.
<%@page import="com.liferay.portlet.PortletURLUtil"%>

<script type="text/javascript">

setTimeout(openUrl, 5000); // Wait 5 seconds

function openUrl(){

   window.open('<%=PortletURLUtil.getRefreshURL(request, themeDisplay) %>');

}

</script>

Thats it will refresh the portlet for every 5 seconds.

In PortletURLUtil  also we have one more method to clone the URL, clone(----)

public static PortletURL clone(
PortletURL portletURL, MimeResponse mimeResponse)
throws PortletException {

----
---
}

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