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| 1 | /* | ||
| 2 | * Copyright (c) 2006, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * 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 | } | ||