001 /* 002 * Copyright (C) 2010 eXo Platform SAS. 003 * 004 * This is free software; you can redistribute it and/or modify it 005 * under the terms of the GNU Lesser General Public License as 006 * published by the Free Software Foundation; either version 2.1 of 007 * the License, or (at your option) any later version. 008 * 009 * This software is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * You should have received a copy of the GNU Lesser General Public 015 * License along with this software; if not, write to the Free 016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org. 018 */ 019 package org.crsh.jcr; 020 021 import groovy.lang.GroovySystem; 022 import groovy.lang.MetaClassRegistry; 023 import org.crsh.jcr.groovy.NodeMetaClass; 024 import org.crsh.plugin.CRaSHPlugin; 025 026 import javax.jcr.Node; 027 import java.beans.IntrospectionException; 028 import java.util.*; 029 import javax.jcr.Repository; 030 031 /** 032 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> 033 * @version $Revision$ 034 */ 035 public abstract class JCRPlugin<T extends JCRPlugin> extends CRaSHPlugin<T> { 036 037 public static Repository findRepository(Map<String, String> properties) throws Exception { 038 for (JCRPlugin plugin : ServiceLoader.load(JCRPlugin.class)) { 039 Repository repository = plugin.getRepository(properties); 040 if (repository != null) { 041 return repository; 042 } 043 } 044 return null; 045 } 046 047 public static Iterable<JCRPlugin> findRepositories() throws Exception { 048 return ServiceLoader.load(JCRPlugin.class); 049 } 050 051 /** . */ 052 private static final Collection<String> NODES = Arrays.asList( 053 "org.exoplatform.services.jcr.impl.core.NodeImpl", 054 "org.apache.jackrabbit.core.NodeImpl", "org.apache.jackrabbit.rmi.client.ClientNode", 055 "org.apache.jackrabbit.rmi.server.ServerNode"); 056 057 /** . */ 058 private static final Object LOCK = new Object(); 059 060 /** . */ 061 private static boolean integrated = false; 062 063 public Collection<String> getNodeClassNames() { 064 return NODES; 065 } 066 067 public abstract Repository getRepository(Map<String, String> properties) throws Exception; 068 069 public abstract String getName(); 070 071 public abstract String getDisplayName(); 072 073 public abstract String getUsage(); 074 075 @Override 076 public void init() { 077 // Force integration of node meta class 078 NodeMetaClass.setup(); 079 synchronized (LOCK) { 080 if (!integrated) { 081 try { 082 MetaClassRegistry registry = GroovySystem.getMetaClassRegistry(); 083 Collection<Class<? extends Node>> nodes = loadAvailablesNodeImplementations(getNodeClassNames()); 084 for (Class<? extends Node> nodeClass : nodes) { 085 registerNodeImplementation(registry, nodeClass); 086 } 087 } catch (IntrospectionException e) { 088 throw new RuntimeException(e); 089 } 090 } 091 integrated = true; 092 } 093 } 094 095 private Collection<Class<? extends Node>> loadAvailablesNodeImplementations( 096 Collection<String> classNames) { 097 List<Class<? extends Node>> classes = new ArrayList<Class<? extends Node>>(classNames.size()); 098 for (String className : classNames) { 099 Class<? extends Node> nodeClass = loadNodeImplementation(className); 100 if (nodeClass != null) { 101 classes.add(nodeClass); 102 } 103 } 104 return classes; 105 } 106 107 private Class<? extends Node> loadNodeImplementation(String className) { 108 try { 109 return (Class<? extends Node>) Thread.currentThread().getContextClassLoader().loadClass( 110 className); 111 } catch (ClassNotFoundException e) { 112 return null; 113 } 114 } 115 116 private void registerNodeImplementation(MetaClassRegistry registry, 117 Class<? extends Node> nodeClass) throws IntrospectionException { 118 NodeMetaClass mc2 = new NodeMetaClass(registry, nodeClass); 119 mc2.initialize(); 120 registry.setMetaClass(nodeClass, mc2); 121 } 122 }