Examples of org.jboss.cache.eviction.EvictionAlgorithm

org.jboss.cache.eviction.EvictionAlgorithm
Interface for all eviction algorithms.
Note: None of the Eviction classes are thread safe. It is assumed that an individual instance of an EvictionPolicy/ EvictionAlgorithm/EvictionQueue/EvictionConfiguration are only operated on by one thread at any given time. @author Ben Wang 2-2004 @author Daniel Huang - dhuang@jboss.org - 10/2005 @version $Revision: 6776 $

      String algorithmClassName = getAttributeValue(element, "algorithmClass");
      EvictionAlgorithmConfig algorithmConfig = null; // every eviction region config needs an algorithm config.


      if (existsAttribute(algorithmClassName))
      {
         EvictionAlgorithm algorithm;
         Class<? extends EvictionAlgorithm> algorithmClass;
         // try using a 'getInstance()' factory.


         try
         {
            algorithmClass = Util.loadClass(algorithmClassName);
         }
         catch (Exception e)
         {
            throw new RuntimeException("Unable to load eviction algorithm class [" + algorithmClassName + "]", e);
         }




         try
         {
            algorithm = Util.getInstance(algorithmClass);
         }
         catch (Exception e)
         {
            throw new ConfigurationException("Unable to construct eviction algorithm class [" + algorithmClassName + "]", e);
         }


         try
         {
            algorithmConfig = Util.getInstance(algorithm.getConfigurationClass());
         }
         catch (Exception e)
         {
            throw new RuntimeException("Failed to instantiate eviction algorithm configuration class [" +
                  algorithm.getConfigurationClass() + "]", e);
         }
      }
      else
      {
         if (!isDefault)

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         if (trace) log.trace("Instantiating " + evictionActionPolicyClass);
         EvictionActionPolicy actionPolicy = (EvictionActionPolicy) Util.getInstance(evictionActionPolicyClass);
         actionPolicy.setCache(regionManager.getCache());


         if (trace) log.trace("Instantiating " + algoConfig.getEvictionAlgorithmClassName());
         EvictionAlgorithm algorithm = (EvictionAlgorithm) Util.getInstance(algoConfig.getEvictionAlgorithmClassName());
         algorithm.setEvictionActionPolicy(actionPolicy);
         algorithm.assignToRegion(fqn, regionManager.getCache(), algoConfig, regionManager.getConfiguration());
         return algorithm;
      }
      catch (Exception e)
      {
         log.fatal("Unable to instantiate eviction algorithm " + algoConfig.getEvictionAlgorithmClassName(), e);

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   {
      assertIsTransformable(defaultEvictionPolicyClass);
      try
      {
         EvictionPolicy policy = (EvictionPolicy) Util.getInstance(defaultEvictionPolicyClass);
         EvictionAlgorithm ea = policy.getEvictionAlgorithm();
         defaultEvictionRegionConfig.setEvictionAlgorithmConfig(Util.getInstance(ea.getConfigurationClass()));
         this.defaultEvictionPolicyClass = defaultEvictionPolicyClass;
      }
      catch (Exception e)
      {
         throw new ConfigurationException(e);

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      String algorithmClassName = getAttributeValue(element, "algorithmClass");
      EvictionAlgorithmConfig algorithmConfig = null; // every eviction region config needs an algorithm config.


      if (existsAttribute(algorithmClassName))
      {
         EvictionAlgorithm algorithm;
         Class<? extends EvictionAlgorithm> algorithmClass;
         // try using a 'getInstance()' factory.


         try
         {
            algorithmClass = Util.loadClass(algorithmClassName);
         }
         catch (Exception e)
         {
            throw new RuntimeException("Unable to load eviction algorithm class [" + algorithmClassName + "]", e);
         }




         try
         {
            algorithm = Util.getInstance(algorithmClass);
         }
         catch (Exception e)
         {
            throw new ConfigurationException("Unable to construct eviction algorithm class [" + algorithmClassName + "]", e);
         }


         try
         {
            algorithmConfig = Util.getInstance(algorithm.getConfigurationClass());
         }
         catch (Exception e)
         {
            throw new RuntimeException("Failed to instantiate eviction algorithm configuration class [" +
                  algorithm.getConfigurationClass() + "]", e);
         }
      }
      else
      {
         if (!isDefault)

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   private static EvictionAlgorithmConfig getEvictionAlgorithmConfig(String evictionClass)
   {
      EvictionConfig.assertIsTransformable(evictionClass);


      EvictionAlgorithm algorithm;


      try
      {
         EvictionPolicy ep = (EvictionPolicy) Util.getInstance(evictionClass);
         Class<? extends EvictionAlgorithm> algoClass = ((ModernizablePolicy) ep).modernizePolicy();
         if (log.isTraceEnabled()) log.trace("Using algo class " + algoClass);
         algorithm = Util.getInstance(algoClass);
      }
      catch (RuntimeException e)
      {
         throw e;
      }
      catch (Exception e)
      {
         throw new RuntimeException("Eviction class is not properly loaded in classloader", e);
      }


      EvictionAlgorithmConfig algorithmConfig;
      try
      {
         algorithmConfig = algorithm.getConfigurationClass().newInstance();
      }
      catch (RuntimeException e)
      {
         throw e;
      }
      catch (Exception e)
      {
         throw new RuntimeException("Failed to instantiate eviction configuration of class " +
               algorithm.getConfigurationClass(), e);
      }
      return algorithmConfig;
   }

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      String algorithmClassName = getAttributeValue(element, "algorithmClass");
      EvictionAlgorithmConfig algorithmConfig = null; // every eviction region config needs an algorithm config.


      if (existsAttribute(algorithmClassName))
      {
         EvictionAlgorithm algorithm;
         Class<? extends EvictionAlgorithm> algorithmClass;
         // try using a 'getInstance()' factory.


         try
         {
            algorithmClass = Util.loadClass(algorithmClassName);
         }
         catch (Exception e)
         {
            throw new RuntimeException("Unable to load eviction algorithm class [" + algorithmClassName + "]", e);
         }




         try
         {
            algorithm = Util.getInstance(algorithmClass);
         }
         catch (Exception e)
         {
            throw new ConfigurationException("Unable to construct eviction algorithm class [" + algorithmClassName + "]", e);
         }


         try
         {
            algorithmConfig = Util.getInstance(algorithm.getConfigurationClass());
         }
         catch (Exception e)
         {
            throw new RuntimeException("Failed to instantiate eviction algorithm configuration class [" +
                  algorithm.getConfigurationClass() + "]", e);
         }
      }
      else
      {
         if (!isDefault)

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      String algorithmClassName = getAttributeValue(element, "algorithmClass");
      EvictionAlgorithmConfig algorithmConfig = null; // every eviction region config needs an algorithm config.


      if (existsAttribute(algorithmClassName))
      {
         EvictionAlgorithm algorithm;
         Class<? extends EvictionAlgorithm> algorithmClass;
         // try using a 'getInstance()' factory.


         try
         {
            algorithmClass = Util.loadClass(algorithmClassName);
         }
         catch (Exception e)
         {
            throw new RuntimeException("Unable to load eviction algorithm class [" + algorithmClassName + "]", e);
         }




         try
         {
            algorithm = Util.getInstance(algorithmClass);
         }
         catch (Exception e)
         {
            throw new ConfigurationException("Unable to construct eviction algorithm class [" + algorithmClassName + "]", e);
         }


         try
         {
            algorithmConfig = Util.getInstance(algorithm.getConfigurationClass());
         }
         catch (Exception e)
         {
            throw new RuntimeException("Failed to instantiate eviction algorithm configuration class [" +
                  algorithm.getConfigurationClass() + "]", e);
         }
      }
      else
      {
         if (!isDefault)

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   private static EvictionAlgorithmConfig getEvictionAlgorithmConfig(String evictionClass)
   {
      EvictionConfig.assertIsTransformable(evictionClass);


      EvictionAlgorithm algorithm;


      try
      {
         EvictionPolicy ep = (EvictionPolicy) Util.getInstance(evictionClass);
         Class<? extends EvictionAlgorithm> algoClass = ((ModernizablePolicy) ep).modernizePolicy();
         if (log.isTraceEnabled()) log.trace("Using algo class " + algoClass);
         algorithm = Util.getInstance(algoClass);
      }
      catch (RuntimeException e)
      {
         throw e;
      }
      catch (Exception e)
      {
         throw new RuntimeException("Eviction class is not properly loaded in classloader", e);
      }


      EvictionAlgorithmConfig algorithmConfig;
      try
      {
         algorithmConfig = algorithm.getConfigurationClass().newInstance();
      }
      catch (RuntimeException e)
      {
         throw e;
      }
      catch (Exception e)
      {
         throw new RuntimeException("Failed to instantiate eviction configuration of class " +
               algorithm.getConfigurationClass(), e);
      }
      return algorithmConfig;
   }

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   private static EvictionAlgorithmConfig getEvictionAlgorithmConfig(String evictionClass)
   {
      EvictionConfig.assertIsTransformable(evictionClass);


      EvictionAlgorithm algorithm;


      try
      {
         EvictionPolicy ep = (EvictionPolicy) Util.getInstance(evictionClass);
         Class<? extends EvictionAlgorithm> algoClass = ((ModernizablePolicy) ep).modernizePolicy();
         if (log.isTraceEnabled()) log.trace("Using algo class " + algoClass);
         algorithm = Util.getInstance(algoClass);
      }
      catch (RuntimeException e)
      {
         throw e;
      }
      catch (Exception e)
      {
         throw new RuntimeException("Eviction class is not properly loaded in classloader", e);
      }


      EvictionAlgorithmConfig algorithmConfig;
      try
      {
         algorithmConfig = algorithm.getConfigurationClass().newInstance();
      }
      catch (RuntimeException e)
      {
         throw e;
      }
      catch (Exception e)
      {
         throw new RuntimeException("Failed to instantiate eviction configuration of class " +
               algorithm.getConfigurationClass(), e);
      }
      return algorithmConfig;
   }

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      String algorithmClassName = getAttributeValue(element, "algorithmClass");
      EvictionAlgorithmConfig algorithmConfig = null; // every eviction region config needs an algorithm config.


      if (existsAttribute(algorithmClassName))
      {
         EvictionAlgorithm algorithm;
         Class<? extends EvictionAlgorithm> algorithmClass;
         // try using a 'getInstance()' factory.


         try
         {
            algorithmClass = Util.loadClass(algorithmClassName);
         }
         catch (Exception e)
         {
            throw new RuntimeException("Unable to load eviction algorithm class [" + algorithmClassName + "]", e);
         }




         try
         {
            algorithm = Util.getInstance(algorithmClass);
         }
         catch (Exception e)
         {
            throw new ConfigurationException("Unable to construct eviction algorithm class [" + algorithmClassName + "]", e);
         }


         try
         {
            algorithmConfig = Util.getInstance(algorithm.getConfigurationClass());
         }
         catch (Exception e)
         {
            throw new RuntimeException("Failed to instantiate eviction algorithm configuration class [" +
                  algorithm.getConfigurationClass() + "]", e);
         }
      }
      else
      {
         if (!isDefault)

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Related Classes of org.jboss.cache.eviction.EvictionAlgorithm

org.jboss.cache.config.EvictionConfig

org.jboss.cache.config.parsing.element.EvictionElementParser

org.jboss.cache.config.parsing.XmlConfigurationParser2x

org.jboss.cache.RegionImpl

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