001package votorola.g.lang; // Copyright 2001-2007, Michael Allan. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE. 002 003import java.util.logging.*; 004import votorola.g.logging.LoggerX; 005 006 007/** An extended Thread, and Thread utilities. 008 */ 009public final @ThreadSafe class ThreadX extends Thread 010{ 011 012 013 public ThreadX() {} 014 015 016 017 public ThreadX( Runnable target ) { super( target ); } 018 019 020 021 public ThreadX( Runnable target, String name ) { super( target, name ); } 022 023 024 025 public ThreadX( ThreadGroup threadGroup, Runnable target, String name ) 026 { 027 super( threadGroup, target, name ); 028 } 029 030 031 032 // ------------------------------------------------------------------------------------ 033 034 035 /** Same as {@linkplain Thread#join() join}(), but returns normally if interrupted. 036 * 037 * @return true if the wait ended normally; false if an InterruptedException 038 * occurred. 039 */ 040 public boolean tryJoin() { return tryJoin( ThreadX.this ); } 041 042 043 044 /** Same as {@linkplain Thread#join() join}(), but returns normally if 045 * interrupted. 046 * 047 * @return true if the wait ended normally; false if an InterruptedException 048 * occurred. 049 */ 050 public static boolean tryJoin( Thread thread ) 051 { 052 try 053 { 054 thread.join(); 055 return true; 056 } 057 catch( InterruptedException x ) { return false; } 058 } 059 060 061 062 /** Same as {@linkplain Thread#join(long) join}(), but returns normally if 063 * interrupted. 064 * 065 * @return true if the wait ended normally; false if an InterruptedException 066 * occurred. 067 */ 068 public boolean tryJoin( long milliseconds ) { return tryJoin( ThreadX.this, milliseconds ); } 069 070 071 072 /** Same as {@linkplain Thread#join(long) join}(), but returns normally if 073 * interrupted. 074 * 075 * @return true if the wait ended normally; false if an InterruptedException 076 * occurred. 077 */ 078 public static boolean tryJoin( Thread thread, long milliseconds ) 079 { 080 try 081 { 082 thread.join( milliseconds ); 083 return true; 084 } 085 catch( InterruptedException x ) { return false; } 086 } 087 088 089 090 /** Same as {@linkplain Thread#sleep(long) sleep}(), but an interruption merely cuts 091 * short the sleep. 092 * 093 * @return true if the wait ended normally; false if an InterruptedException 094 * occurred. 095 */ 096 public static boolean trySleep( long milliseconds ) 097 { 098 try 099 { 100 Thread.sleep( milliseconds ); 101 return true; 102 } 103 catch( InterruptedException x ) { return false; } 104 } 105 106 107 108 // ==================================================================================== 109 110 111 /** A handler that logs uncaught exceptions and errors using the thread's associated 112 * logger. 113 */ 114 public static @ThreadSafe class UncaughtExceptionLogger 115 implements Thread.UncaughtExceptionHandler 116 { 117 118 119 /** Constructs an UncaughtExceptionLogger. 120 * 121 * @see #loggingLevel() 122 */ 123 public UncaughtExceptionLogger( Level _loggingLevel ) { loggingLevel = _loggingLevel; } 124 // FIX by parametizing with a Catcher instead 125 126 127 128 // -------------------------------------------------------------------------------- 129 130 131 /** The level at which all uncaught exceptions and errors are logged. 132 */ 133 public final Level loggingLevel() { return loggingLevel; } 134 135 136 private final Level loggingLevel; 137 138 139 140 // - T h r e a d . U n c a u g h t - E x c e p t i o n - H a n d l e r ------------ 141 142 143 public void uncaughtException( final Thread thread, final Throwable t ) 144 { 145 if( t instanceof ThreadDeath ) throw (ThreadDeath)t; // always let it die, if ThreadDeath ever passed into here 146 147 LoggerX.i(thread.getClass()).log( loggingLevel, /*message*/"", t ); 148 } 149 150 151 152 } 153 154 155 156 // ==================================================================================== 157 158 159 /** A handler that prints stack traces of uncaught exceptions and errors to the 160 * standard error stream. Similar to the default behaviour of 161 * ThreadGroup.{@linkplain java.lang.ThreadGroup#uncaughtException 162 * uncaughtException}. 163 */ 164 public static @ThreadSafe class UncaughtExceptionPrinter 165 implements Thread.UncaughtExceptionHandler 166 { 167 public void uncaughtException( Thread thread, final Throwable t ) 168 { 169 if( t instanceof ThreadDeath ) throw (ThreadDeath)t; // always let it die, if ThreadDeath ever passed into here 170 171 Catcher.U.printStackTrace( thread, t, System.err ); 172 } 173 } 174 175 176}