J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.tools.jconsole; |
| 27 | |
| 28 | import java.awt.Font; |
| 29 | import java.awt.event.WindowAdapter; |
| 30 | import java.awt.event.WindowEvent; |
| 31 | import java.io.*; |
| 32 | |
| 33 | import javax.swing.*; |
| 34 | |
| 35 | /** |
| 36 | * A simple console window to display messages sent to System.out and |
| 37 | * System.err. |
| 38 | * |
| 39 | * A stop-gap solution until an error dialog is implemented. |
| 40 | */ |
| 41 | public class OutputViewer { |
| 42 | private static JFrame frame; |
| 43 | private static JTextArea ta; |
| 44 | |
| 45 | static { |
| 46 | System.setOut(PipeListener.create("System.out")); |
| 47 | System.setErr(PipeListener.create("System.err")); |
| 48 | } |
| 49 | |
| 50 | // Dummy to cause class to be loaded |
| 51 | public static void init() { } |
| 52 | |
| 53 | private static void append(String s) { |
| 54 | if (frame == null) { |
| 55 | // FIXME: The frame title should be a localized string. |
| 56 | frame = new JFrame("JConsole: Output"); |
| 57 | ta = new JTextArea(); |
| 58 | ta.setEditable(false); |
| 59 | frame.getContentPane().add(new JScrollPane(ta)); |
| 60 | ta.setFont(new Font("Monospaced", Font.BOLD, 14)); |
| 61 | frame.setSize(500, 600); |
| 62 | frame.setLocation(1024-500, 768-600); |
| 63 | // Exit JConsole if no window remains. |
| 64 | // e.g. jconsole -version only creates the OutputViewer |
| 65 | // but no other window. |
| 66 | frame.addWindowListener(new WindowAdapter() { |
| 67 | public void windowClosing(WindowEvent e) { |
| 68 | if (JFrame.getFrames().length == 1) { |
| 69 | System.exit(0); |
| 70 | } |
| 71 | } |
| 72 | }); |
| 73 | } |
| 74 | ta.append(s); |
| 75 | ta.setCaretPosition(ta.getText().length()); |
| 76 | frame.setVisible(true); |
| 77 | } |
| 78 | |
| 79 | private static void appendln(String s) { |
| 80 | append(s+"\n"); |
| 81 | } |
| 82 | |
| 83 | private static class PipeListener extends Thread { |
| 84 | public PrintStream ps; |
| 85 | private String name; |
| 86 | private PipedInputStream inPipe; |
| 87 | private BufferedReader br; |
| 88 | |
| 89 | public static PrintStream create(String name) { |
| 90 | return new PipeListener(name).ps; |
| 91 | } |
| 92 | |
| 93 | private PipeListener(String name) { |
| 94 | this.name = name; |
| 95 | |
| 96 | try { |
| 97 | inPipe = new PipedInputStream(); |
| 98 | ps = new PrintStream(new PipedOutputStream(inPipe)); |
| 99 | br = new BufferedReader(new InputStreamReader(inPipe)); |
| 100 | } catch (IOException e) { |
| 101 | appendln("PipeListener<init>("+name+"): " + e); |
| 102 | } |
| 103 | start(); |
| 104 | } |
| 105 | |
| 106 | public void run() { |
| 107 | try { |
| 108 | String str; |
| 109 | while ((str = br.readLine()) != null) { |
| 110 | appendln(str); |
| 111 | |
| 112 | // Hack: Turn off thread check in PipedInputStream. |
| 113 | // Any thread should be allowed to write except this one |
| 114 | // but we just use this one to keep the pipe alive. |
| 115 | try { |
| 116 | java.lang.reflect.Field f = |
| 117 | PipedInputStream.class.getDeclaredField("writeSide"); |
| 118 | f.setAccessible(true); |
| 119 | f.set(inPipe, this); |
| 120 | } catch (Exception e) { |
| 121 | appendln("PipeListener("+name+").run: "+e); |
| 122 | } |
| 123 | } |
| 124 | appendln("-- "+name+" closed --"); |
| 125 | br.close(); |
| 126 | } catch (IOException e) { |
| 127 | appendln("PipeListener("+name+").run: "+e); |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | } |