1 package org.apache.fulcrum.yaafi.framework.interceptor;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22
23 /**
24 * Defining the common interface of all interceptors.
25 *
26 * @author <a href="mailto:siegfried.goeschl@it20one.at">Siegfried Goeschl</a>
27 */
28
29 public interface AvalonInterceptorService
30 {
31 /** indicating entering a service method */
32 int ON_ENTRY = 0;
33
34 /** indicating exiting a service method without throwing an exception */
35 int ON_EXIT = 1;
36
37 /** indicating exiting a service method throwing an exception */
38 int ON_ERROR = 2;
39
40 /**
41 * Called before a service method is invoked.
42 *
43 * @param avalonInterceptorContext shared interceptor context
44 */
45 void onEntry( AvalonInterceptorContext avalonInterceptorContext );
46
47 /**
48 * Called after a service method was invoked.
49 *
50 * @param avalonInterceptorContext shared interceptor context
51 * @param result the result of the invocation
52 */
53 void onExit( AvalonInterceptorContext avalonInterceptorContext, Object result );
54
55 /**
56 * Called when a service method throws an exeption
57 *
58 * @param avalonInterceptorContext shared interceptor context
59 * @param t the resulting exception
60 */
61 void onError( AvalonInterceptorContext avalonInterceptorContext, Throwable t);
62 }