/*
* Copyright (C) 2011 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.web.application.javascript;
import java.io.InputStream;
import javax.servlet.ServletContext;
import org.exoplatform.commons.utils.Safe;
import org.exoplatform.container.PortalContainer;
import org.exoplatform.container.RootContainer.PortalContainerPostInitTask;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import org.gatein.wci.WebApp;
import org.gatein.wci.WebAppEvent;
import org.gatein.wci.WebAppLifeCycleEvent;
import org.gatein.wci.WebAppListener;
/**
* An listener for listening the ADDED and REMOVED events of the webapp to deploy/undeploy Javascript configured in
* <code>/WEB-INF/gatein-resources.xml</code> file.
*
* @author <a href="trongtt@gmail.com">Trong Tran</a>
* @version $Revision$
*/
public class JavascriptConfigDeployer implements WebAppListener {
public static final String GATEIN_CONFIG_RESOURCE = "/WEB-INF/gatein-resources.xml";
/**
* Logger
*/
private static final Log LOG = ExoLogger.getLogger(JavascriptConfigDeployer.class);
/** . */
private final JavascriptConfigService javascriptService;
/**
* The name of the portal container
*/
private final String portalContainerName;
public JavascriptConfigDeployer(String portalContainerName, JavascriptConfigService javascriptService) {
this.javascriptService = javascriptService;
this.portalContainerName = portalContainerName;
}
public void onEvent(WebAppEvent event) {
if (event instanceof WebAppLifeCycleEvent) {
WebAppLifeCycleEvent lifeCycleEvent = (WebAppLifeCycleEvent) event;
ServletContext servletContext = lifeCycleEvent.getWebApp().getServletContext();
switch (lifeCycleEvent.getType()) {
case WebAppLifeCycleEvent.ADDED:
add(event.getWebApp());
break;
case WebAppLifeCycleEvent.REMOVED:
remove(event.getWebApp());
break;
}
}
}
private void add(final WebApp webApp) {
try {
InputStream is = webApp.getServletContext().getResourceAsStream(GATEIN_CONFIG_RESOURCE);
if (is == null) {
return;
}
Safe.close(is);
final PortalContainerPostInitTask task = new PortalContainerPostInitTask() {
public void execute(ServletContext scontext, PortalContainer portalContainer) {
register(scontext, portalContainer);
javascriptService.registerContext(webApp);
}
};
PortalContainer.addInitTask(webApp.getServletContext(), task, portalContainerName);
} catch (Exception ex) {
LOG.error(
"An error occurs while registering 'Javascript in gatein-resources.xml' from the context '"
+ (webApp.getServletContext() == null ? "unknown" : webApp.getServletContext()
.getServletContextName()) + "'", ex);
}
}
private void remove(WebApp webApp) {
javascriptService.unregisterServletContext(webApp);
try {
JavascriptConfigParser.unregisterResources(javascriptService, webApp.getServletContext());
} catch (Exception ex) {
LOG.error(
"An error occured while removing script resources for the context '"
+ webApp.getServletContext().getServletContextName() + "'", ex);
}
}
private void register(ServletContext scontext, PortalContainer container) {
InputStream is = null;
try {
is = scontext.getResourceAsStream(GATEIN_CONFIG_RESOURCE);
JavascriptConfigParser.processConfigResource(is, javascriptService, scontext);
} catch (Exception ex) {
LOG.error(
"An error occurs while processing 'Javascript in gatein-resources.xml' from the context '"
+ scontext.getServletContextName() + "'", ex);
} finally {
Safe.close(is);
}
}
}