001/* 002 * (C) Copyright 2006-2009 Nuxeo SAS (http://nuxeo.com/) and contributors. 003 * 004 * (C) Copyright 2006, JBoss Inc., and individual contributors as indicated 005 * by the @authors tag. See the copyright.txt in the distribution for a 006 * full listing of individual contributors. 007 * 008 * All rights reserved. This program and the accompanying materials 009 * are made available under the terms of the GNU Lesser General Public License 010 * (LGPL) version 2.1 which accompanies this distribution, and is available at 011 * http://www.gnu.org/licenses/lgpl.html 012 * 013 * This library is distributed in the hope that it will be useful, 014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 016 * Lesser General Public License for more details. 017 * 018 * Contributors: 019 * JBoss and Seam dev team 020 * Thierry Delprat 021 */ 022package org.nuxeo.ecm.webapp.seam; 023 024import java.lang.reflect.Field; 025import java.util.Set; 026 027import javax.management.InstanceNotFoundException; 028import javax.management.JMException; 029import javax.management.MBeanException; 030import javax.management.MBeanServer; 031import javax.management.MalformedObjectNameException; 032import javax.management.ObjectName; 033import javax.management.ReflectionException; 034import javax.servlet.ServletContext; 035import javax.servlet.http.HttpServletRequest; 036 037import org.apache.commons.logging.Log; 038import org.apache.commons.logging.LogFactory; 039import org.jboss.seam.Seam; 040import org.jboss.seam.core.Init; 041import org.jboss.seam.init.Initialization; 042import org.nuxeo.launcher.config.ConfigurationGenerator; 043import org.nuxeo.runtime.api.Framework; 044import org.nuxeo.runtime.management.ServerLocator; 045 046/** 047 * Helper class to manage Seam Hot Reload Most of the code comes from Jboss Seam 2.0.3-RC1 Debug package 048 * (HotDeployFilter) 049 */ 050public class SeamHotReloadHelper { 051 052 private static final Log log = LogFactory.getLog(SeamHotReloadHelper.class); 053 054 @Deprecated 055 public static final String SEAM_HOT_RELOAD_SYSTEM_PROP = ConfigurationGenerator.SEAM_DEBUG_SYSTEM_PROP; 056 057 public static boolean isHotReloadEnabled() { 058 String sysProp = System.getProperty(ConfigurationGenerator.SEAM_DEBUG_SYSTEM_PROP, "false"); 059 return Boolean.TRUE.equals(Boolean.valueOf(sysProp)); 060 } 061 062 public static void flush() { 063 Seam.clearComponentNameCache(); 064 try { 065 Field f = Seam.class.getDeclaredField("CLASSLOADERS_LOADED"); 066 f.setAccessible(true); 067 ((Set<?>) f.get(null)).clear(); 068 } catch (ReflectiveOperationException e) { 069 log.warn("Can't flush seam class loader cache", e); 070 } 071 try { 072 // TODO: check if this would be needed for Studio hot reload (?) 073 flushWebResources(); 074 } catch (ReflectiveOperationException | JMException e) { 075 log.error("Cannot flush web resources, did you start with the sdk profile active ?", e); 076 } 077 } 078 079 public static Set<String> reloadSeamComponents(HttpServletRequest httpRequest) { 080 081 ServletContext servletContext = httpRequest.getSession().getServletContext(); 082 083 Init init = (Init) servletContext.getAttribute(Seam.getComponentName(Init.class)); 084 if (init != null && init.hasHotDeployableComponents()) { 085 try { 086 new Initialization(servletContext).redeploy(httpRequest); 087 } catch (InterruptedException e) { 088 log.error("Error during hot redeploy", e); 089 } 090 } 091 092 // re-initialized by re-deployment, why removing ? 093 // servletContext.removeAttribute(Seam.getComponentName(Pages.class)); 094 return init.getHotDeployableComponents(); 095 } 096 097 public static Set<String> getHotDeployableComponents(HttpServletRequest httpRequest) { 098 ServletContext servletContext = httpRequest.getSession().getServletContext(); 099 Init init = (Init) servletContext.getAttribute(Seam.getComponentName(Init.class)); 100 return init.getHotDeployableComponents(); 101 102 } 103 104 /** 105 * Flushes resources for tomcat cache 106 * 107 * @since 5.5 108 */ 109 protected static void flushWebResources() throws ReflectiveOperationException, JMException { 110 ObjectName on = new ObjectName("org.nuxeo:type=sdk,name=web-resources"); 111 MBeanServer mbs = Framework.getLocalService(ServerLocator.class).lookupServer(); 112 if (mbs.isRegistered(on)) { 113 // only in tomcat container 114 mbs.invoke(on, "flushWebResources", new Object[0], new String[0]); 115 } 116 } 117 118}