ProxyLoggingInterceptorFactory


1   // Copyright 2004, 2005 The Apache Software Foundation
2   //
3   // Licensed under the Apache License, Version 2.0 (the "License");
4   // you may not use this file except in compliance with the License.
5   // You may obtain a copy of the License at
6   //
7   //     http://www.apache.org/licenses/LICENSE-2.0
8   //
9   // Unless required by applicable law or agreed to in writing, software
10  // distributed under the License is distributed on an "AS IS" BASIS,
11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  // See the License for the specific language governing permissions and
13  // limitations under the License.
14  
15  package org.apache.hivemind.examples.impl;
16  
17  import java.lang.reflect.InvocationHandler  ;
18  import java.lang.reflect.Proxy  ;
19  import java.util.List  ;
20  
21  import org.apache.commons.logging.Log;
22  import org.apache.hivemind.InterceptorStack;
23  import org.apache.hivemind.ServiceInterceptorFactory;
24  import org.apache.hivemind.internal.Module;
25  
26  /**
27   * Creates a simple, proxy-based interceptor that mimics most (but not all) of the behavior
28   * of {@link org.apache.hivemind.service.impl.LoggingInterceptorFactory}.
29   *
30   * @author Howard Lewis Ship
31   */
32  public class ProxyLoggingInterceptorFactory implements ServiceInterceptorFactory
33  {
34  
35      public void createInterceptor(InterceptorStack stack, Module invokingModule, List   parameters)
36      {
37          Log log = stack.getServiceLog();
38  
39          InvocationHandler   handler = new ProxyLoggingInvocationHandler(log, stack.peek());
40  
41          Object   interceptor =
42              Proxy.newProxyInstance(
43                  invokingModule.getClassResolver().getClassLoader(),
44                  new Class  [] { stack.getServiceInterface()},
45                  handler);
46  
47          stack.push(interceptor);
48      }
49  }
50

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