1 /*
2 *
3 * ====================================================================
4 *
5 * The Apache Software License, Version 1.1
6 *
7 * Copyright (c) 1999-2002 The Apache Software Foundation. All rights
8 * reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 *
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in
19 * the documentation and/or other materials provided with the
20 * distribution.
21 *
22 * 3. The end-user documentation included with the redistribution, if
23 * any, must include the following acknowlegement:
24 * "This product includes software developed by the
25 * Apache Software Foundation (http://www.apache.org/)."
26 * Alternately, this acknowlegement may appear in the software itself,
27 * if and wherever such third-party acknowlegements normally appear.
28 *
29 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
30 * Foundation" must not be used to endorse or promote products derived
31 * from this software without prior written permission. For written
32 * permission, please contact apache@apache.org.
33 *
34 * 5. Products derived from this software may not be called "Apache"
35 * nor may "Apache" appear in their names without prior written
36 * permission of the Apache Group.
37 *
38 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
39 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
40 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
41 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
44 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
45 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
46 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
47 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
48 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49 * SUCH DAMAGE.
50 * ====================================================================
51 *
52 * This software consists of voluntary contributions made by many
53 * individuals on behalf of the Apache Software Foundation. For more
54 * information on the Apache Software Foundation, please see
55 * <http://www.apache.org/>.
56 */
57 package org.apache.commons.jelly.tags.core;
58
59 import java.io.FileOutputStream;
60 import java.io.FileWriter;
61 import java.io.IOException;
62
63 import org.apache.commons.jelly.MissingAttributeException;
64 import org.apache.commons.jelly.TagSupport;
65 import org.apache.commons.jelly.XMLOutput;
66
67 /*** A tag that spwans the contained script in a separate thread
68 *
69 * @author <a href="mailto:vinayc@apache.org">Vinay Chandran</a>
70 */
71 public class ThreadTag extends TagSupport
72 {
73 /*** Thread Name */
74 private String name = null;
75 /*** the destination of output */
76 private XMLOutput xmlOutput;
77
78
79 public ThreadTag()
80 {
81 }
82
83 // Tag interface
84 //-------------------------------------------------------------------------
85 public void doTag(final XMLOutput output) throws Exception {
86 if ( xmlOutput == null ) {
87 throw new MissingAttributeException("xmlOutput");
88 }
89
90 Thread thread = new Thread(
91 new Runnable() {
92 public void run() {
93 try {
94 invokeBody(xmlOutput);
95 xmlOutput.close();
96 }
97 catch (Exception e) {
98 e.printStackTrace();
99 }
100 }
101 }
102 );
103 if ( name != null ) {
104 thread.setName( name );
105 }
106 thread.start();
107 }
108
109 /***
110 * Sets the name of the thread.
111 * @param name The name to set
112 */
113 public void setName(String name) {
114 this.name = name;
115 }
116
117 /***
118 * Sets the destination of output
119 */
120 public void setXmlOutput(XMLOutput xmlOutput) {
121 this.xmlOutput = xmlOutput;
122 }
123
124 /***
125 * Set the file which is generated from the output
126 * @param name The output file name
127 */
128 public void setFile(String name) throws IOException {
129 setXmlOutput( XMLOutput.createXMLOutput(new FileOutputStream(name)) );
130 }
131 }
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