org.vfny.geoserver.action.FreeJAIMemoryAction Maven / Gradle / Ivy
/*
* Created on Jan 28, 2004
*
* To change the template for this generated file go to
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*/
package org.vfny.geoserver.action;
import com.sun.media.jai.util.SunTileCache;
import org.apache.struts.Globals;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.vfny.geoserver.global.GeoServer;
import org.vfny.geoserver.global.UserContainer;
import javax.media.jai.JAI;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Free JAI Memory by running the Tile Cahce flushing.
*
* This represents an action that interacts with the running GeoServer
* application (it is not really a config action, it is just that I want the
* user to be logged in).
*
* @author $Author: Alessio Fabiani $ (last modification)
*/
public class FreeJAIMemoryAction extends ConfigAction {
/* (non-Javadoc)
* @see org.vfny.geoserver.action.ConfigAction#execute(org.apache.struts.action.ActionMapping, org.apache.struts.action.ActionForm, org.vfny.geoserver.global.UserContainer, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
public ActionForward execute(ActionMapping mapping, ActionForm form, UserContainer user,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
ServletContext sc = request.getSession().getServletContext();
final JAI jaiDef = ((GeoServer) sc.getAttribute(GeoServer.WEB_CONTAINER_KEY)).getJAIDefault();
final SunTileCache jaiCache = ((GeoServer) sc.getAttribute(GeoServer.WEB_CONTAINER_KEY))
.getJaiCache();
final long capacityBefore = jaiCache.getMemoryCapacity();
final long usageBefore = jaiCache.getCacheMemoryUsed();
jaiCache.flush();
jaiCache.setMemoryCapacity(0); //to be sure we realease all tiles
System.gc();
System.gc();
System.gc();
System.gc();
System.gc();
System.gc();
jaiCache.setMemoryCapacity(capacityBefore);
final long usageAfter = jaiCache.getCacheMemoryUsed();
// Provide status message
//
final ActionErrors errors = new ActionErrors();
errors.add(ActionErrors.GLOBAL_ERROR,
new ActionError("message.JAI.memory", new Long((usageBefore - usageAfter) / 1024)));
request.setAttribute(Globals.ERROR_KEY, errors);
// return back to the admin screen
//
return mapping.findForward("admin");
}
}