| /* |
| * 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.naming.factory; |
| |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Proxy; |
| import java.sql.SQLException; |
| import java.util.Hashtable; |
| |
| import javax.naming.Context; |
| import javax.naming.Name; |
| import javax.naming.NamingException; |
| import javax.naming.RefAddr; |
| import javax.naming.Reference; |
| import javax.sql.DataSource; |
| |
| |
| |
| /** |
| * <p>Object factory for resource links for shared data sources.</p> |
| * |
| * @author Filip Hanik |
| */ |
| public class DataSourceLinkFactory extends ResourceLinkFactory { |
| |
| public static void setGlobalContext(Context newGlobalContext) { |
| ResourceLinkFactory.setGlobalContext(newGlobalContext); |
| } |
| // ------------------------------------------------- ObjectFactory Methods |
| |
| |
| /** |
| * Create a new DataSource instance. |
| * |
| * @param obj The reference object describing the DataSource |
| */ |
| @Override |
| public Object getObjectInstance(Object obj, Name name, Context nameCtx, Hashtable<?,?> environment) |
| throws NamingException { |
| Object result = super.getObjectInstance(obj, name, nameCtx, environment); |
| // Can we process this request? |
| if (result!=null) { |
| Reference ref = (Reference) obj; |
| RefAddr userAttr = ref.get("username"); |
| RefAddr passAttr = ref.get("password"); |
| if (userAttr.getContent()!=null && passAttr.getContent()!=null) { |
| result = wrapDataSource(result,userAttr.getContent().toString(), passAttr.getContent().toString()); |
| } |
| } |
| return result; |
| } |
| |
| protected Object wrapDataSource(Object datasource, String username, String password) throws NamingException { |
| try { |
| Class<?> proxyClass = Proxy.getProxyClass(datasource.getClass().getClassLoader(), datasource.getClass().getInterfaces()); |
| Constructor<?> proxyConstructor = proxyClass.getConstructor(new Class[] { InvocationHandler.class }); |
| DataSourceHandler handler = new DataSourceHandler((DataSource)datasource, username, password); |
| return proxyConstructor.newInstance(handler); |
| }catch (Exception x) { |
| if (x instanceof NamingException) throw (NamingException)x; |
| else { |
| NamingException nx = new NamingException(x.getMessage()); |
| nx.initCause(x); |
| throw nx; |
| } |
| } |
| } |
| |
| /** |
| * Simple wrapper class that will allow a user to configure a ResourceLink for a data source |
| * so that when {@link javax.sql.DataSource#getConnection()} is called, it will invoke |
| * {@link javax.sql.DataSource#getConnection(String, String)} with the preconfigured username and password. |
| */ |
| public static class DataSourceHandler implements InvocationHandler { |
| private final DataSource ds; |
| private final String username; |
| private final String password; |
| private final Method getConnection; |
| public DataSourceHandler(DataSource ds, String username, String password) throws Exception { |
| this.ds = ds; |
| this.username = username; |
| this.password = password; |
| getConnection = ds.getClass().getMethod("getConnection", String.class, String.class); |
| } |
| |
| @Override |
| public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { |
| |
| if ("getConnection".equals(method.getName()) && (args==null || args.length==0)) { |
| args = new String[] {username,password}; |
| method = getConnection; |
| } else if ("unwrap".equals(method.getName())) { |
| return unwrap((Class<?>)args[0]); |
| } |
| try { |
| return method.invoke(ds,args); |
| }catch (Throwable t) { |
| if (t instanceof InvocationTargetException) { |
| InvocationTargetException it = (InvocationTargetException)t; |
| throw it.getCause()!=null?it.getCause():it; |
| } else { |
| throw t; |
| } |
| } |
| } |
| |
| public Object unwrap(Class<?> iface) throws SQLException { |
| if (iface == DataSource.class) { |
| return ds; |
| } else { |
| throw new SQLException("Not a wrapper of "+iface.getName()); |
| } |
| } |
| |
| } |
| |
| |
| |
| |
| } |
| |