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Date: 9 Dec 2001 07:12:55 -0000
Message-ID: <20011209071255.56836.qmail@icarus.apache.org>
From: donaldp@apache.org
To: jakarta-avalon-phoenix-cvs@apache.org
Subject: cvs commit:
 jakarta-avalon-phoenix/console/src/java/org/apache/avalon/phoenix/console
 TimeTool.java MBeanAccessor.java MBeanTool.java
X-Spam-Rating: daedalus.apache.org 1.6.2 0/1000/N
X-Spam-Rating: daedalus.apache.org 1.6.2 0/1000/N

donaldp     01/12/08 23:12:55

  Added:       console/src/java/org/apache/avalon/phoenix/console
                        TimeTool.java MBeanAccessor.java MBeanTool.java
  Log:
  Add some tools that make it easier to display MBeans using velocity.
  
  Revision  Changes    Path
  1.1                  jakarta-avalon-phoenix/console/src/java/org/apache/avalon/phoenix/console/TimeTool.java
  
  Index: TimeTool.java
  ===================================================================
  /*
   * Copyright (C) The Apache Software Foundation. All rights reserved.
   *
   * This software is published under the terms of the Apache Software License
   * version 1.1, a copy of which has been included  with this distribution in
   * the LICENSE file.
   */
  package org.apache.avalon.phoenix.console;
  
  import java.util.Date;
  import java.text.SimpleDateFormat;
  
  /**
   * Provides convenient time utilities for Velocity.
   *
   * @author <a href="mailto:nathan@esha.com">Nathan Bubna</a>
   * @author <a href="mailto:peter@apache.org">Peter Donald</a>
   */
  public class TimeTool
  {
      private final static long SECOND = 1000;
      private final static long MINUTE = SECOND * 60;
      private final static long HOUR = MINUTE * 60;
      private final static long DAY = HOUR * 24;
      private final static long YEAR = DAY * 365;
      
      /**
       * This is probably going to be the most used method.  
       * As such, here's the some quick examples
       *
       *   Examples: "E, MMMM d" will result in "Tue, July 7"
       *             "EEE, M/dd/yyyy (H:m)" will result in "Tuesday, 7/07/1996 (14:12)"
       *
       * @see <a href="http://java.sun.com/j2se/1.3/docs/api/java/text/SimpleDateFormat.html">SimpleDateFormat</a>
       * @param format SimpleDateFormat (e.g. "MM/dd/yyyy") that you wish to use for the given date
       * @param date that is a Date
       * @return String representation of the given date/time in the given format
       */
      public static String formatDate( final String format, final long date )
      {
          final SimpleDateFormat formatter = new SimpleDateFormat( format );
          return formatter.format( new Date( date ) );
      }
  
      public static String formatDuration( final long duration )
      {
          return formatDuration( duration, Integer.MAX_VALUE );
      }
  
      public static String formatDuration( long duration, int accuracy )
      {
          final long years = duration / YEAR;
          duration -= years * YEAR;
          final long days = duration / DAY;
          duration -= days * DAY;
          final long hours = duration / HOUR;
          duration -= hours * HOUR;
          final long minutes = duration / MINUTE;
          duration -= minutes * MINUTE;
          final long seconds = duration / SECOND;
          duration -= seconds * SECOND;
  
          final StringBuffer sb = new StringBuffer();
  
          if( 0 < years )
          {
              if( 0 != sb.length() ) sb.append( ", " );
              sb.append( years );
              sb.append( " year" );
              if( 1 != years ) sb.append( "s" );
              accuracy--;
              if( 0 >= accuracy ) return sb.toString();
          }
  
          if( 0 < days )
          {
              if( 0 != sb.length() ) sb.append( ", " );
              sb.append( days );
              sb.append( " day" );
              if( 1 != days ) sb.append( "s" );
              accuracy--;
              if( 0 >= accuracy ) return sb.toString();
          }
  
          if( 0 < hours )
          {
              if( 0 != sb.length() ) sb.append( ", " );
              sb.append( hours );
              sb.append( " hour" );
              if( 1 != hours ) sb.append( "s" );
              accuracy--;
              if( 0 >= accuracy ) return sb.toString();
          }
  
          if( 0 < minutes )
          {
              if( 0 != sb.length() ) sb.append( ", " );
              sb.append( minutes );
              sb.append( " minute" );
              if( 1 != minutes ) sb.append( "s" );
              accuracy--;
              if( 0 >= accuracy ) return sb.toString();
          }
  
          if( 0 < seconds )
          {
              if( 0 != sb.length() ) sb.append( ", " );
              sb.append( seconds );
              sb.append( " second" );
              if( 1 != seconds ) sb.append( "s" );
              accuracy--;
              if( 0 >= accuracy ) return sb.toString();
          }
  
          return sb.toString();
      }
  }
  
  
  
  1.1                  jakarta-avalon-phoenix/console/src/java/org/apache/avalon/phoenix/console/MBeanAccessor.java
  
  Index: MBeanAccessor.java
  ===================================================================
  package org.apache.avalon.phoenix.console;
  
  import java.util.ArrayList;
  import javax.management.MBeanAttributeInfo;
  import javax.management.MBeanInfo;
  import javax.management.MBeanServer;
  import javax.management.ObjectName;
  import javax.management.ObjectInstance;
  import org.apache.jmx.adaptor.RMIAdaptor;
  
  /**
   *  This is a small utility class to allow easy access to mbean attributes.
   *
   * @author <a href="mailto:peter@apache.org">Peter Donald</a>
   */
  public class MBeanAccessor
  {
      private final RMIAdaptor m_mBeanServer;
      private final ObjectName m_objectName;
  
      private MBeanInfo m_mBeanInfo;
      private ObjectInstance m_objectInstance;
  
      /** Hold the attribute objects by attribute name */
      private ArrayList m_attributes = new ArrayList();
  
      /**
       * Create an accessor that treats, mBean attributes as normal attributes.
       * It also adds a special attribute "meta" via which you can get the
       * MBeanInfo.
       *
       * @param mBeanInfo the MBeanInfo to wrap
       */
      public MBeanAccessor( final ObjectName objectName, final RMIAdaptor mBeanServer )
      {
          m_objectName = objectName;
          m_mBeanServer = mBeanServer;
      }
  
      public String className()
          throws Exception
      {
          return getObjectInstance().getClassName();
      }
  
      public MBeanInfo info()
          throws Exception
      {
          return getMBeanInfo();
      }
  
      public ObjectName name()
      {
          return m_objectName;
      }
  
      /**
       *  Accessor method to get the fields by name.
       *
       *  @param fieldName Name of static field to retrieve
       *
       *  @return The value of the given field.
       */
      public Object get( String fieldName )
          throws Exception
      {
          //We need to force load the MBeanInfo 
          //If it hasn't yet been loaded
          getMBeanInfo();
  
          if( m_attributes.contains( fieldName ) )
          {
              return m_mBeanServer.getAttribute( m_objectName, fieldName );
          }
          else
          {
              return null;
          }
      }
  
      private MBeanInfo getMBeanInfo()
          throws Exception
      {
          if( null == m_mBeanInfo )
          {
              m_mBeanInfo = m_mBeanServer.getMBeanInfo( m_objectName );
  
              final MBeanAttributeInfo[] attributes = m_mBeanInfo.getAttributes();
              if( null != attributes ) 
              {
                  for( int i = 0; i < attributes.length; i++ )
                  {
                      final MBeanAttributeInfo attribute = attributes[ i ];
                      m_attributes.add( attribute.getName() );
                  }
              }
          }
  
          return m_mBeanInfo;
      }
  
      private ObjectInstance getObjectInstance()
          throws Exception
      {
          if( null == m_objectInstance )
          {
              m_objectInstance = m_mBeanServer.getObjectInstance( m_objectName );
          }
  
          return m_objectInstance;
      }
  }
  
  
  
  1.1                  jakarta-avalon-phoenix/console/src/java/org/apache/avalon/phoenix/console/MBeanTool.java
  
  Index: MBeanTool.java
  ===================================================================
  package org.apache.avalon.phoenix.console;
  
  import javax.management.MBeanAttributeInfo;
  import javax.management.MBeanInfo;
  import javax.management.MBeanServer;
  import javax.management.ObjectName;
  import javax.management.InstanceNotFoundException;
  import org.apache.jmx.adaptor.RMIAdaptor;
  
  /**
   *  This is a small utility class to interact with an MBeanServer.
   *
   * @author <a href="mailto:peter@apache.org">Peter Donald</a>
   */
  public class MBeanTool
  {
      private final RMIAdaptor m_mBeanServer;
  
      public MBeanTool( final RMIAdaptor mBeanServer )
      {
          m_mBeanServer = mBeanServer;
      }
  
      public MBeanAccessor getObject( final String name )
          throws Exception
      {
          return new MBeanAccessor( getObjectName( name ), m_mBeanServer );
      }
  
      private ObjectName getObjectName( final String name )
          throws Exception
      {
          //Deal with domains et al here
          return new ObjectName( name );
      }
  }
  
  
  

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