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Java > Open Source Codes > org > apache > taglibs > response > FlushBufferTag


1 /*
2  * Copyright 1999,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 package org.apache.taglibs.response;
18
19 import java.io.*;
20 import java.util.*;
21 import javax.servlet.*;
22 import javax.servlet.http.*;
23 import javax.servlet.jsp.*;
24 import javax.servlet.jsp.tagext.*;
25
26 /**
27  * JSP Tag <b>flushBuffer</b>, used to flush the output buffer to the client.
28  * <p>
29  * JSP Tag Lib Descriptor
30  * <p><pre>
31  * &lt;name&gt;flushBuffer&lt;/name&gt;
32  * &lt;tagclass&gt;org.apache.taglibs.response.FlushBufferTag&lt;/tagclass&gt;
33  * &lt;bodycontent&gt;empty&lt;/bodycontent&gt;
34  * &lt;info&gt;Forces any content in the buffer to be written to the client.&lt;/info&gt;
35  * </pre>
36  *
37  * @author Glenn Nielsen
38  */
39
40 public class FlushBufferTag extends TagSupport
41 {
42
43     /**
44      * Method called at end of Tag, forces flush of output buffer to client.
45      *
46      * @return EVAL_PAGE
47      */
48     public final int doEndTag() throws JspException
49     {
50     try {
51         pageContext.getResponse().flushBuffer();
52     } catch(IOException e) {
53         throw new JspException("Response flushBuffer tag failed: " +
54         e.getMessage());
55     }
56     return EVAL_PAGE;
57     }
58
59 }
60
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