Liferay Portlet部署时间戳

Question

I need to include some JavaScript in jsp pages:

<script type="text/javascript" src="<%=request.getContextPath()%>/newsletter/js/newsletter.js"></script>

When I deploy a new portlet version and I change this JavaScript file, some users see the old version of this file.

I saw that Liferay adds last deploy timestamp to javascripts ( ...js?t=14573725543 ), and I can do it if I add this file to liferay-portlet.xml . But I can't do it with newsletter.js . Sometimes I need no load this file.

Is it possible to add manually this automatic timestamp? I do something similar in a theme with $theme_timestamp .

Answer 1

Liferay is using com.liferay.portal.model.Portlet.getTimestamp() to generate the number after t= . You can get the (Liferay) portlet from the PortletContext:

<%
LiferayPortletContext context = (LiferayPortletContext) portletConfig.getPortletContext();
long timestamp = context.getPortlet().getTimestamp();
%>
<script type="text/javascript" 
        src="<%=request.getContextPath()%>/newsletter/js/newsletter.js?t=<%=timestamp%>">
</script>