001/* 002 * (C) Copyright 2006, JBoss Inc., and individual contributors as indicated 003 * by the @authors tag. See the copyright.txt in the distribution for a 004 * full listing of individual contributors. 005 * 006 * All rights reserved. This program and the accompanying materials 007 * are made available under the terms of the GNU Lesser General Public License 008 * (LGPL) version 2.1 which accompanies this distribution, and is available at 009 * http://www.gnu.org/licenses/lgpl.html 010 * 011 * This library is distributed in the hope that it will be useful, 012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 * Lesser General Public License for more details. 015 * 016 * Contributors: 017 * JBoss and Seam dev team 018 * Thierry Delprat 019 */ 020package org.nuxeo.ecm.webapp.seam; 021 022import java.lang.reflect.Field; 023import java.util.Set; 024 025import javax.management.JMException; 026import javax.management.MBeanServer; 027import javax.management.ObjectName; 028import javax.servlet.ServletContext; 029import javax.servlet.http.HttpServletRequest; 030 031import org.apache.commons.logging.Log; 032import org.apache.commons.logging.LogFactory; 033import org.jboss.seam.Seam; 034import org.jboss.seam.core.Init; 035import org.jboss.seam.init.Initialization; 036import org.nuxeo.ecm.core.api.NuxeoException; 037import org.nuxeo.launcher.config.ConfigurationGenerator; 038import org.nuxeo.runtime.api.Framework; 039import org.nuxeo.runtime.management.ServerLocator; 040 041/** 042 * Helper class to manage Seam Hot Reload Most of the code comes from Jboss Seam 2.0.3-RC1 Debug package 043 * (HotDeployFilter) 044 */ 045public class SeamHotReloadHelper { 046 047 private static final Log log = LogFactory.getLog(SeamHotReloadHelper.class); 048 049 @Deprecated 050 public static final String SEAM_HOT_RELOAD_SYSTEM_PROP = ConfigurationGenerator.SEAM_DEBUG_SYSTEM_PROP; 051 052 public static boolean isHotReloadEnabled() { 053 return Framework.isBooleanPropertyTrue(ConfigurationGenerator.SEAM_DEBUG_SYSTEM_PROP); 054 } 055 056 public static void flush() { 057 Seam.clearComponentNameCache(); 058 try { 059 Field f = Seam.class.getDeclaredField("CLASSLOADERS_LOADED"); 060 f.setAccessible(true); 061 ((Set<?>) f.get(null)).clear(); 062 } catch (ReflectiveOperationException e) { 063 log.warn("Can't flush seam class loader cache", e); 064 } 065 try { 066 // TODO: check if this would be needed for Studio hot reload (?) 067 flushWebResources(); 068 } catch (ReflectiveOperationException | JMException e) { 069 log.error("Cannot flush web resources, did you start with the sdk profile active ?", e); 070 } 071 } 072 073 public static Set<String> reloadSeamComponents(HttpServletRequest httpRequest) { 074 075 ServletContext servletContext = httpRequest.getSession().getServletContext(); 076 077 Init init = (Init) servletContext.getAttribute(Seam.getComponentName(Init.class)); 078 if (init.hasHotDeployableComponents()) { 079 try { 080 new Initialization(servletContext).redeploy(httpRequest); 081 } catch (InterruptedException e) { 082 Thread.currentThread().interrupt(); 083 throw new NuxeoException(e); 084 } 085 } 086 087 // re-initialized by re-deployment, why removing ? 088 // servletContext.removeAttribute(Seam.getComponentName(Pages.class)); 089 return init.getHotDeployableComponents(); 090 } 091 092 public static Set<String> getHotDeployableComponents(HttpServletRequest httpRequest) { 093 ServletContext servletContext = httpRequest.getSession().getServletContext(); 094 Init init = (Init) servletContext.getAttribute(Seam.getComponentName(Init.class)); 095 return init.getHotDeployableComponents(); 096 097 } 098 099 /** 100 * Flushes resources for tomcat cache 101 * 102 * @since 5.5 103 */ 104 protected static void flushWebResources() throws ReflectiveOperationException, JMException { 105 ObjectName on = new ObjectName("org.nuxeo:type=sdk,name=web-resources"); 106 MBeanServer mbs = Framework.getService(ServerLocator.class).lookupServer(); 107 if (mbs.isRegistered(on)) { 108 // only in tomcat container 109 mbs.invoke(on, "flushWebResources", new Object[0], new String[0]); 110 } 111 } 112 113}