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1 /* ====================================================================
2 * The Apache Software License, Version 1.1
3 *
4 * Copyright (c) 2000 The Apache Software Foundation. All rights
5 * reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * 3. The end-user documentation included with the redistribution,
20 * if any, must include the following acknowledgment:
21 * "This product includes software developed by the
22 * Apache Software Foundation (http://www.apache.org/)."
23 * Alternately, this acknowledgment may appear in the software itself,
24 * if and wherever such third-party acknowledgments normally appear.
25 *
26 * 4. The names "Apache" and "Apache Software Foundation" must
27 * not be used to endorse or promote products derived from this
28 * software without prior written permission. For written
29 * permission, please contact apache@apache.org.
30 *
31 * 5. Products derived from this software may not be called "Apache",
32 * nor may "Apache" appear in their name, without prior written
33 * permission of the Apache Software Foundation.
34 *
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * SUCH DAMAGE.
47 * ====================================================================
48 *
49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Software Foundation. For more
51 * information on the Apache Software Foundation, please see
52 * <http://www.apache.org/>;.
53 *
54 * Portions of this software are based upon public domain software
55 * originally written at the National Center for Supercomputing Applications,
56 * University of Illinois, Urbana-Champaign.
57 */
58
59 package org.troublescope.examples.helloworld;
60
61 import java.io.*;
62
63 import java.net.JarURLConnection;
64 import java.net.URL;
65
66 /***
67 * A 'Hello World' application for testing the TroubleScope system.
68 */
69 public class HelloWorldApplication
70 {
71
72 /***
73 * Start the application.
74 */
75 static public void main(String[] args)
76 {
77 BufferedReader in = null;
78 try {
79 String home = getHomeDirectory();
80 System.out.println("Home directory: " + home);
81 in = new BufferedReader(new FileReader(new File(home, "HelloWorld.txt")));
82 System.out.println(in.readLine());
83 } catch (Exception e) {
84 System.err.println("Error starting application. Please go to http://www.troublescope.org/ for troubleshooting assistance.");
85 } finally {
86 if (in != null) {
87 try {
88 in.close();
89 } catch (IOException e) {
90 System.err.println("Error closing resource");
91 }
92 }
93 }
94 }
95
96 /***
97 * Find the home directory.
98 */
99 static private String getHomeDirectory()
100 {
101 URL url = HelloWorldApplication.class.getResource("HelloWorldApplication.class");
102 if ("jar".equals(url.getProtocol())) {
103 try {
104 JarURLConnection conn = (JarURLConnection) url.openConnection();
105 return new File(conn.getJarFile().getName()).getParent();
106 } catch (IOException e) {
107 return ".";
108 }
109 } else {
110 return url.getFile();
111 }
112 }
113
114 }
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