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Java > Open Source Codes > org > apache > catalina > CometFilterChain


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
19 package org.apache.catalina;
20
21 import java.io.IOException JavaDoc;
22
23 import javax.servlet.ServletException JavaDoc;
24
25 /**
26  * A CometFilterChain is an object provided by the servlet container to the developer
27  * giving a view into the invocation chain of a filtered event for a resource. Filters
28  * use the CometFilterChain to invoke the next filter in the chain, or if the calling filter
29  * is the last filter in the chain, to invoke the resource at the end of the chain.
30  *
31  * @author Remy Maucherat
32  * @author Filip Hanik
33  */
34 public interface CometFilterChain {
35
36     
37     /**
38      * Causes the next filter in the chain to be invoked, or if the calling filter is the last filter
39      * in the chain, causes the resource at the end of the chain to be invoked.
40      *
41      * @param event the event to pass along the chain.
42      */
43     public void doFilterEvent(CometEvent event) throws IOException JavaDoc, ServletException JavaDoc;
44     
45
46 }
47
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