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ServiceInterceptorFactory.java | - | - | - | - |
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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; | |
16 | ||
17 | import java.util.List; | |
18 | ||
19 | import org.apache.hivemind.internal.Module; | |
20 | ||
21 | /** | |
22 | * Interface defining an interceptor factory, an object that can create | |
23 | * an interceptor. Interceptors are objects that implement a particular | |
24 | * interface, adding logic before or after invoking methods on a wrapped | |
25 | * object (implementing the same instance). | |
26 | * | |
27 | * <p> | |
28 | * Implementations must be stateless and multi-threaded. | |
29 | * An interceptor may only be applied once to any single service. | |
30 | * The factory will only be invoked once for any single service (even in the case | |
31 | * of non-standard service models such as threaded and pooled). | |
32 | * | |
33 | * @author Howard Lewis Ship | |
34 | */ | |
35 | public interface ServiceInterceptorFactory | |
36 | { | |
37 | /** | |
38 | * Creates an interceptor and pushes it onto the interceptor stack. | |
39 | */ | |
40 | public void createInterceptor(InterceptorStack stack, Module invokingModule, List parameters); | |
41 | } |
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