001 /* 002 * Copyright (C) 2012 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 public abstract class JCRPlugin<T extends JCRPlugin> extends CRaSHPlugin<T> { 032 033 public static Repository findRepository(Map<String, String> properties) throws Exception { 034 for (JCRPlugin plugin : ServiceLoader.load(JCRPlugin.class)) { 035 Repository repository = plugin.getRepository(properties); 036 if (repository != null) { 037 return repository; 038 } 039 } 040 return null; 041 } 042 043 public static Iterable<JCRPlugin> findRepositories() throws Exception { 044 return ServiceLoader.load(JCRPlugin.class); 045 } 046 047 /** . */ 048 private static final Collection<String> NODES = Arrays.asList( 049 "org.exoplatform.services.jcr.impl.core.NodeImpl", 050 "org.apache.jackrabbit.core.NodeImpl", "org.apache.jackrabbit.rmi.client.ClientNode", 051 "org.apache.jackrabbit.rmi.server.ServerNode"); 052 053 /** . */ 054 private static final Object LOCK = new Object(); 055 056 /** . */ 057 private static boolean integrated = false; 058 059 public Collection<String> getNodeClassNames() { 060 return NODES; 061 } 062 063 public abstract Repository getRepository(Map<String, String> properties) throws Exception; 064 065 public abstract String getName(); 066 067 public abstract String getDisplayName(); 068 069 public abstract String getUsage(); 070 071 @Override 072 public void init() { 073 // Force integration of node meta class 074 NodeMetaClass.setup(); 075 synchronized (LOCK) { 076 if (!integrated) { 077 try { 078 MetaClassRegistry registry = GroovySystem.getMetaClassRegistry(); 079 Collection<Class<? extends Node>> nodes = loadAvailablesNodeImplementations(getNodeClassNames()); 080 for (Class<? extends Node> nodeClass : nodes) { 081 registerNodeImplementation(registry, nodeClass); 082 } 083 } catch (IntrospectionException e) { 084 throw new RuntimeException(e); 085 } 086 } 087 integrated = true; 088 } 089 } 090 091 private Collection<Class<? extends Node>> loadAvailablesNodeImplementations( 092 Collection<String> classNames) { 093 List<Class<? extends Node>> classes = new ArrayList<Class<? extends Node>>(classNames.size()); 094 for (String className : classNames) { 095 Class<? extends Node> nodeClass = loadNodeImplementation(className); 096 if (nodeClass != null) { 097 classes.add(nodeClass); 098 } 099 } 100 return classes; 101 } 102 103 private Class<? extends Node> loadNodeImplementation(String className) { 104 try { 105 return (Class<? extends Node>) Thread.currentThread().getContextClassLoader().loadClass( 106 className); 107 } catch (ClassNotFoundException e) { 108 return null; 109 } 110 } 111 112 private void registerNodeImplementation(MetaClassRegistry registry, 113 Class<? extends Node> nodeClass) throws IntrospectionException { 114 NodeMetaClass mc2 = new NodeMetaClass(registry, nodeClass); 115 mc2.initialize(); 116 registry.setMetaClass(nodeClass, mc2); 117 } 118 }