01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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.catalina;
19:
20: import java.io.IOException;
21:
22: import javax.servlet.ServletException;
23:
24: /**
25: * A CometFilterChain is an object provided by the servlet container to the developer
26: * giving a view into the invocation chain of a filtered event for a resource. Filters
27: * use the CometFilterChain to invoke the next filter in the chain, or if the calling filter
28: * is the last filter in the chain, to invoke the resource at the end of the chain.
29: *
30: * @author Remy Maucherat
31: * @author Filip Hanik
32: */
33: public interface CometFilterChain {
34:
35: /**
36: * Causes the next filter in the chain to be invoked, or if the calling filter is the last filter
37: * in the chain, causes the resource at the end of the chain to be invoked.
38: *
39: * @param event the event to pass along the chain.
40: */
41: public void doFilterEvent(CometEvent event) throws IOException,
42: ServletException;
43:
44: }
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