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annotate org.eclipse.equinox.common/src/org/eclipse/core/internal/runtime/RuntimeLog.d @ 105:bbe49769ec18

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author Frank Benoit <benoit@tionex.de>
date Sun, 08 Nov 2009 12:42:30 +0100
parents bc29606a740c
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Julian Chen - fix for bug #92572, jclRM
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11 *******************************************************************************/
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12 // Port to the D programming language:
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13 // Frank Benoit <benoit@tionex.de>
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14 module org.eclipse.core.internal.runtimeRuntimeLog;
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15
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16 import java.lang.all;
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18 import org.eclipse.core.internal.runtimeIRuntimeConstants; // packageimport
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19
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20 import java.util.ArrayList;
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21 import java.util.Iterator;
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22
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23 import org.eclipse.core.runtime.ILogListener;
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24 import org.eclipse.core.runtime.IStatus;
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25 import org.eclipse.core.runtime.OperationCanceledException;
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26
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27 /**
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28 * NOT API!!! This log infrastructure was split from the InternalPlatform.
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29 *
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30 * @since org.eclipse.equinox.common 3.2
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31 */
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32 // XXX this must be removed and replaced with something more reasonable
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33 public final class RuntimeLog {
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34
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35 private static ArrayList logListeners = new ArrayList(5);
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36
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37 /**
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38 * Keep the messages until the first log listener is registered.
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39 * Once first log listeners is registred, it is going to receive
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40 * all status messages accumulated during the period when no log
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41 * listener was available.
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42 */
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43 private static ArrayList queuedMessages = new ArrayList(5);
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44
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45 /**
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46 * See org.eclipse.core.runtime.Platform#addLogListener(ILogListener)
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47 */
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48 public static void addLogListener(ILogListener listener) {
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49 synchronized (logListeners) {
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50 bool firstListener = (logListeners.size() is 0);
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51 // replace if already exists (Set behaviour but we use an array
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52 // since we want to retain order)
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53 logListeners.remove(listener);
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54 logListeners.add(listener);
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55 if (firstListener) {
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56 for (Iterator i = queuedMessages.iterator(); i.hasNext();) {
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57 try {
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58 IStatus recordedMessage = cast(IStatus) i.next();
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59 listener.logging(recordedMessage, IRuntimeConstants.PI_RUNTIME);
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60 } catch (Exception e) {
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61 handleException(e);
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62 } catch (LinkageError e) {
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63 handleException(e);
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64 }
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65 }
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66 queuedMessages.clear();
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67 }
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68 }
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69 }
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70
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71 /**
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72 * See org.eclipse.core.runtime.Platform#removeLogListener(ILogListener)
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73 */
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74 public static void removeLogListener(ILogListener listener) {
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75 synchronized (logListeners) {
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76 logListeners.remove(listener);
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77 }
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78 }
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80 /**
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81 * Checks if the given listener is present
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82 */
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83 public static bool contains(ILogListener listener) {
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84 synchronized (logListeners) {
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85 return logListeners.contains(listener);
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86 }
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87 }
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89 /**
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90 * Notifies all listeners of the platform log.
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91 */
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92 public static void log(final IStatus status) {
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93 // create array to avoid concurrent access
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94 ILogListener[] listeners;
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95 synchronized (logListeners) {
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96 listeners = (ILogListener[]) logListeners.toArray(new ILogListener[logListeners.size()]);
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97 if (listeners.length is 0) {
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98 queuedMessages.add(status);
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99 return;
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100 }
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101 }
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102 for (int i = 0; i < listeners.length; i++) {
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103 try {
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104 listeners[i].logging(status, IRuntimeConstants.PI_RUNTIME);
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105 } catch (Exception e) {
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106 handleException(e);
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107 } catch (LinkageError e) {
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108 handleException(e);
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109 }
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110 }
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111 }
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112
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113 private static void handleException(Throwable e) {
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114 if (!( null !is cast(OperationCanceledException)e )) {
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115 // Got a error while logging. Don't try to log again, just put it into stderr
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116 e.printStackTrace();
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117 }
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118 }
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119
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120 /**
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121 * Helps determine if any listeners are registered with the logging mechanism.
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122 * @return true if no listeners are registered
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123 */
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124 public static bool isEmpty() {
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125 synchronized (logListeners) {
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126 return (logListeners.size() is 0);
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127 }
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128 }
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129
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130 }