Showing the changes to java/pkg/sun/tools/jconsole/OutputViewer.java (1 of 18352 files). Show all
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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 | +} | |