call servlet not work in production environment, liferay production, liferay hello, liferay calling, liferay environment, liferay hosting, liferay url

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Alessandro Cosenza	:	call servlet not work in production environment
		hello, I have a servlet with mapping /abc (in web.xml).
		In local mode, calling -> localhost:8080/abc => works.
		In production environment -> www.xyz.com/abc => I get "resource not found".
		I use virtual hosting (Guest community has www.xyz.com as public URL configured in Manages Pages panel) with Apache Web Server on top of Tomcat. Maybe this could be the problem?
		Any suggestions ? I don't know what to do...
		Thanks in advance.
Mazhar Anwar	:	I think you need to set a mount point in your apache web server httpd.conf as follows,
		# Sets a mount point from a context to a Tomcat worker. In this case will allow access (forward the request) to the console.
		JkMount /abc/* ajp13
		Regards,
Alessandro Cosenza	:	Thanks for your fast answer.
		I just tried to insert that entry in my conf file but it doesn't work..
		A strange thing is that when I enter that URL (this already happened before), from my log console I can see that init() method of the servlet gets called. Instead service() method doesn't.
		More ideas? I'm a little bit frustrated.
		Thanks however.
Alessandro Cosenza	:	Content of my conf file is
		First I tried this
		add ProxyPass at the end of the file and it doesn't work.
		Then I tried to add JkMount at the end
		and for a few moments it worked (service() got called) but I got exceptions (from MainServlet, ecc.).
		After a new restart it began to stop working again.
		Strange....
Mazhar Anwar	:	Hi Aless...
		I wanna some more idea about the servlet. Have you written servlet in Liferay Context(ROOT)? Can you tell me your url-pattern for the servlet? What's the response you wanna to generate?
		If you want to call the servlet from the portlet it will be better if you use serveResource() method of portletAPI rather than defining a new servlet.
		Regards,
Alessandro Cosenza	:	I'm using Liferay 5.2.3.
		I have written servlet in Ext environment and modified web.xml as following:
		I need this servlet to interact with Facebook API.
		In service() method I have the following instructions
		I have also tried to call servlet from processAction() of a portlet. How could I use serveResource method? do you think it would be useful for me?
Mazhar Anwar	:	Hi Aless,
		Is your servlet working on local environment without any exception and you achieved expected functionality? If yes then don't bother about serveResource() method.
		Anyway, ServeRecource() methods is added in portlet API to serve static and dynamic content from the portlet. For more information about it you can refer following links.
		http://www.ibm.com/developerworks/websphere/library/techarticles/0803_hepper/0803_hepper.html
		AND
		http://www.bluesunrise.com/portlet-api/javax/portlet/ResourceServingPortlet.html
		Further, for using serveResource method in liferay portlet, simple steps are
		1- Create an instance of ResourceURL in you jsp as
		ResourceURL resourceURL = renderResponse.createResourceURL();
		resourceURL.setParameter("parameterName", parameterValue);
		2- Assign some event to hit the url using javascript or on form submit.
		<a href='javascipt:document.location.href="<%= resourceURL.toString() %>";'>
		3- define the method in your portlet class where you have define processAction(), as
		public void serveResource(
		ResourceRequest resourceRequest, ResourceResponse resourceResponse)
		throws IOException, PortletException {
		......
		your code goes here..
		... you can get parameters using resourceRequest Object.
		}
		Note: in your portlet class you need to import javax.portlet.ResourceRequest and javax.portlet.ResourceResponse classes.
		Hope This will help you
		Regards,