1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.proxy.invoker;
19
20 import org.apache.commons.proxy.Invoker;
21 import org.apache.commons.proxy.exception.InvokerException;
22 import org.apache.xmlrpc.XmlRpcException;
23 import org.apache.xmlrpc.XmlRpcHandler;
24
25 import java.lang.reflect.Method;
26 import java.util.Vector;
27
28 /**
29 * Uses <a href="http://ws.apache.org/xmlrpc/">Apache XML-RPC</a> to invoke methods on an XML-RPC service.
30 *
31 * <p>
32 * <b>Dependencies</b>:
33 * <ul>
34 * <li>Apache XML-RPC version 2.0 or greater</li>
35 * </ul>
36 * </p>
37 * @author James Carman
38 * @since 1.0
39 */
40 public class XmlRpcInvoker implements Invoker
41 {
42 private final XmlRpcHandler handler;
43 private final String handlerName;
44
45 public XmlRpcInvoker( XmlRpcHandler handler, String handlerName )
46 {
47 this.handler = handler;
48 this.handlerName = handlerName;
49 }
50
51 public Object invoke( Object proxy, Method method, Object[] args ) throws Throwable
52 {
53 final Object returnValue = handler.execute( handlerName + "." + method.getName(), toArgumentVector( args ) );
54 if( returnValue instanceof XmlRpcException )
55 {
56 throw new InvokerException( "Unable to execute XML-RPC call.", ( XmlRpcException )returnValue );
57
58 }
59 return returnValue;
60 }
61
62 private Vector toArgumentVector( Object[] args )
63 {
64 final Vector v = new Vector();
65 for( int i = 0; i < args.length; i++ )
66 {
67 Object arg = args[i];
68 v.addElement( arg );
69 }
70 return v;
71 }
72 }