| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.activemq.jndi; |
| |
| import java.util.Enumeration; |
| import java.util.Hashtable; |
| import java.util.Properties; |
| |
| import javax.naming.Context; |
| import javax.naming.Name; |
| import javax.naming.NamingException; |
| import javax.naming.Reference; |
| import javax.naming.StringRefAddr; |
| import javax.naming.spi.ObjectFactory; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Converts objects implementing JNDIStorable into a property fields so they can |
| * be stored and regenerated from JNDI |
| */ |
| public class JNDIReferenceFactory implements ObjectFactory { |
| |
| static Logger log = LoggerFactory.getLogger(JNDIReferenceFactory.class); |
| |
| /** |
| * This will be called by a JNDIprovider when a Reference is retrieved from |
| * a JNDI store - and generates the orignal instance |
| * |
| * @param object the Reference object |
| * @param name the JNDI name |
| * @param nameCtx the context |
| * @param environment the environment settings used by JNDI |
| * @return the instance built from the Reference object |
| * @throws Exception if building the instance from Reference fails (usually |
| * class not found) |
| */ |
| public Object getObjectInstance(Object object, Name name, Context nameCtx, Hashtable environment) throws Exception { |
| Object result = null; |
| if (object instanceof Reference) { |
| Reference reference = (Reference)object; |
| |
| if (log.isTraceEnabled()) { |
| log.trace("Getting instance of " + reference.getClassName()); |
| } |
| |
| Class theClass = loadClass(this, reference.getClassName()); |
| if (JNDIStorableInterface.class.isAssignableFrom(theClass)) { |
| |
| JNDIStorableInterface store = (JNDIStorableInterface)theClass.newInstance(); |
| Properties properties = new Properties(); |
| for (Enumeration iter = reference.getAll(); iter.hasMoreElements();) { |
| |
| StringRefAddr addr = (StringRefAddr)iter.nextElement(); |
| properties.put(addr.getType(), (addr.getContent() == null) ? "" : addr.getContent()); |
| |
| } |
| store.setProperties(properties); |
| result = store; |
| } |
| } else { |
| log.error("Object " + object + " is not a reference - cannot load"); |
| throw new RuntimeException("Object " + object + " is not a reference"); |
| } |
| return result; |
| } |
| |
| /** |
| * Create a Reference instance from a JNDIStorable object |
| * |
| * @param instanceClassName |
| * @param po |
| * @return |
| * @throws NamingException |
| */ |
| |
| public static Reference createReference(String instanceClassName, JNDIStorableInterface po) throws NamingException { |
| if (log.isTraceEnabled()) { |
| log.trace("Creating reference: " + instanceClassName + "," + po); |
| } |
| Reference result = new Reference(instanceClassName, JNDIReferenceFactory.class.getName(), null); |
| try { |
| Properties props = po.getProperties(); |
| for (Enumeration iter = props.propertyNames(); iter.hasMoreElements();) { |
| String key = (String)iter.nextElement(); |
| String value = props.getProperty(key); |
| javax.naming.StringRefAddr addr = new javax.naming.StringRefAddr(key, value); |
| result.add(addr); |
| } |
| } catch (Exception e) { |
| log.error(e.getMessage(), e); |
| throw new NamingException(e.getMessage()); |
| } |
| return result; |
| } |
| |
| /** |
| * Retrieve the class loader for a named class |
| * |
| * @param thisObj |
| * @param className |
| * @return |
| * @throws ClassNotFoundException |
| */ |
| |
| public static Class loadClass(Object thisObj, String className) throws ClassNotFoundException { |
| // tryu local ClassLoader first. |
| ClassLoader loader = thisObj.getClass().getClassLoader(); |
| Class theClass; |
| if (loader != null) { |
| theClass = loader.loadClass(className); |
| } else { |
| // Will be null in jdk1.1.8 |
| // use default classLoader |
| theClass = Class.forName(className); |
| } |
| return theClass; |
| } |
| |
| } |