Source for gnu.java.lang.management.CompilationMXBeanImpl

   1: /* CompilationMXBeanImpl.java - Implementation of a compilation bean
   2:    Copyright (C) 2006 Free Software Foundation
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package gnu.java.lang.management;
  39: 
  40: import gnu.classpath.SystemProperties;
  41: 
  42: import java.lang.management.CompilationMXBean;
  43: 
  44: import javax.management.NotCompliantMBeanException;
  45: 
  46: /**
  47:  * Provides access to information about the JIT
  48:  * compiler of the virtual machine, if one exists.
  49:  * Instances of this bean are obtained by calling
  50:  * {@link ManagementFactory#getCompilationMXBean()},
  51:  * if this is the case.
  52:  *
  53:  * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
  54:  * @since 1.5
  55:  */
  56: public final class CompilationMXBeanImpl
  57:   extends BeanImpl
  58:   implements CompilationMXBean
  59: {
  60: 
  61:   /**
  62:    * Constant for compiler name.
  63:    */
  64:   private static final String COMPILER_NAME = "gnu.java.compiler.name";
  65: 
  66:   /**
  67:    * Constant for compilation time support.
  68:    */
  69:   private static final String COMPILATION_TIME_SUPPORT =
  70:     "gnu.java.lang.management.CompilationTimeSupport";
  71: 
  72:   /**
  73:    * Constructs a new <code>CompilationMXBeanImpl</code>.
  74:    *
  75:    * @throws NotCompliantMBeanException if this class doesn't implement
  76:    *                                    the interface or a method appears
  77:    *                                    in the interface that doesn't comply
  78:    *                                    with the naming conventions.
  79:    */
  80:   public CompilationMXBeanImpl()
  81:     throws NotCompliantMBeanException
  82:   {
  83:     super(CompilationMXBean.class);
  84:   }
  85: 
  86:   public String getName()
  87:   {
  88:     return SystemProperties.getProperty(COMPILER_NAME);
  89:   }
  90: 
  91:   public boolean isCompilationTimeMonitoringSupported()
  92:   {
  93:     return SystemProperties.getProperty(COMPILATION_TIME_SUPPORT) != null;
  94:   }
  95: 
  96:   public long getTotalCompilationTime()
  97:   {
  98:     if (isCompilationTimeMonitoringSupported())
  99:       return VMCompilationMXBeanImpl.getTotalCompilationTime();
 100:     else
 101:       throw new UnsupportedOperationException("Compilation time monitoring "
 102:                                               + "is not supported");
 103:   }
 104: 
 105: }