Coverage Report - org.mule.management.support.AutoDiscoveryJmxSupportFactory
 
Classes in this File Line Coverage Branch Coverage Complexity
AutoDiscoveryJmxSupportFactory
0%
0/16
0%
0/5
1.4
 
 1  
 /*
 2  
  * $Id: AutoDiscoveryJmxSupportFactory.java 7976 2007-08-21 14:26:13Z dirk.olmes $
 3  
  * --------------------------------------------------------------------------------------
 4  
  * Copyright (c) MuleSource, Inc.  All rights reserved.  http://www.mulesource.com
 5  
  *
 6  
  * The software in this package is published under the terms of the CPAL v1.0
 7  
  * license, a copy of which has been included with this distribution in the
 8  
  * LICENSE.txt file.
 9  
  */
 10  
 package org.mule.management.support;
 11  
 
 12  
 import org.mule.util.ClassUtils;
 13  
 
 14  
 import java.io.ObjectStreamException;
 15  
 import java.lang.reflect.Method;
 16  
 
 17  
 import javax.management.ObjectName;
 18  
 
 19  
 import org.apache.commons.logging.Log;
 20  
 import org.apache.commons.logging.LogFactory;
 21  
 
 22  
 /**
 23  
  * Will discover if newer JMX version is available, otherwise fallback to JMX 1.1
 24  
  * style support.
 25  
  */
 26  
 // @Immutable
 27  
 public class AutoDiscoveryJmxSupportFactory implements JmxSupportFactory
 28  
 {
 29  
     /**
 30  
      * Safe initialization for a singleton.
 31  
      */
 32  0
     private static final JmxSupportFactory instance = new AutoDiscoveryJmxSupportFactory();
 33  
 
 34  
     /**
 35  
      * logger used by this class
 36  
      */
 37  0
     private transient Log logger = LogFactory.getLog(getClass());
 38  
 
 39  
     /**
 40  
      * A cached JMX support class instance.
 41  
      */
 42  
     private JmxSupport jmxSupport;
 43  
 
 44  
 
 45  
     /** Constructs a new AutoDiscoveryJmxSupportFactory. */
 46  
     protected AutoDiscoveryJmxSupportFactory ()
 47  0
     {
 48  0
         final boolean jmxModernAvailable = isModernSpecAvailable();
 49  
 
 50  
         // tertiary operand does not work anymore after hiererachy refactoring ?!
 51  0
         if (jmxModernAvailable)
 52  
         {
 53  0
             jmxSupport = new JmxModernSupport();
 54  
         }
 55  
         else
 56  
         {
 57  0
             jmxSupport = new JmxLegacySupport();
 58  
         }
 59  0
         if (logger.isDebugEnabled())
 60  
         {
 61  0
             logger.debug("JMX support instance is " + jmxSupport);
 62  
         }
 63  0
     }
 64  
 
 65  
     /**
 66  
      * Obtain an instance of the factory class.
 67  
      * @return a cached singleton instance
 68  
      */
 69  
     public static JmxSupportFactory getInstance()
 70  
     {
 71  0
         return instance;
 72  
     }
 73  
 
 74  
 
 75  
     /**
 76  
      * Will try to detect if JMX 1.2 or later is available, otherwise will fallback
 77  
      * to the JMX 1.1 version of the support class.
 78  
      *
 79  
      * @return matching support class instance
 80  
      * @see JmxLegacySupport
 81  
      */
 82  
     public JmxSupport getJmxSupport ()
 83  
     {
 84  0
         return this.jmxSupport;
 85  
     }
 86  
 
 87  
     /**
 88  
      * Is JMX 1.2 and up available for use?
 89  
      * @return false if only JMX 1.1 can be used
 90  
      */
 91  
     protected boolean isModernSpecAvailable ()
 92  
     {
 93  0
         Class clazz = ObjectName.class;
 94  
         // method escape() is available since JMX 1.2
 95  0
         Method method = ClassUtils.getMethod(clazz, "quote", new Class[]{String.class});
 96  
 
 97  0
         return  method != null;
 98  
     }
 99  
 
 100  
     /**
 101  
      * Safe deserialization.
 102  
      * @throws ObjectStreamException will never throw it for this class
 103  
      * @return singleton instance for this classloader/JVM
 104  
      */
 105  
     private Object readResolve() throws ObjectStreamException
 106  
     {
 107  0
         return instance;
 108  
     }
 109  
 }