Examples of org.infinispan.interceptors.base.CommandInterceptor

Package org.infinispan.interceptors.base

Examples of org.infinispan.interceptors.base.CommandInterceptor

org.infinispan.interceptors.base.CommandInterceptor
This is the base class for all interceptors to extend, and implements the {@link Visitor} interface allowing it tointercept invocations on {@link VisitableCommand}s.
Commands are either created by the {@link CacheImpl} (for invocations on the {@link Cache} public interface), orby the {@link InboundInvocationHandler} for remotely originating invocations, and are passed up the interceptor chainby using the {@link InterceptorChain} helper class.
When writing interceptors, authors can either override a specific visitXXX() method (such as {@link #visitGetKeyValueCommand(InvocationContext,GetKeyValueCommand)}) or the more generic {@link #handleDefault(InvocationContext,VisitableCommand)} which is the default behaviour of any visit method, as definedin {@link AbstractVisitor#handleDefault(InvocationContext,VisitableCommand)}.
The preferred approach is to override the specific visitXXX() methods that are of interest rather than to override {@link #handleDefault(InvocationContext,VisitableCommand)} and then write a series of if statements or a switchblock, if command-specific behaviour is needed.
@author Mircea.Markus@jboss.com @see VisitableCommand @see Visitor @see InterceptorChain @since 4.0

      if (firstInChain.getClass().equals(toBeReplacedInterceptorType)) {
         replacingInterceptor.setNext(firstInChain.getNext());
         firstInChain = replacingInterceptor;
         return true;
      }
      CommandInterceptor it = firstInChain;
      CommandInterceptor previous = firstInChain;
      while (it.getNext() != null) {
         CommandInterceptor current = it.getNext();
         if (current.getClass().equals(toBeReplacedInterceptorType)) {
            replacingInterceptor.setNext(current.getNext());
            previous.setNext(replacingInterceptor);
            return true;
         }
         previous = current;
         it = current;

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   /**
    * Appends at the end.
    */
   public synchronized void appendIntereceptor(CommandInterceptor ci) {
      CommandInterceptor it = firstInChain;
      while (it.hasNext()) it = it.getNext();
      it.setNext(ci);
      // make sure we nullify the "next" pointer in the last interceptors.
      ci.setNext(null);
   }

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   /**
    * Returns all the interceptors that have the fully qualified name of their class equal with the supplied class
    * name.
    */
   public List<CommandInterceptor> getInterceptorsWithClassName(String name) {
      CommandInterceptor iterator = firstInChain;
      List<CommandInterceptor> result = new ArrayList<CommandInterceptor>(2);
      while (iterator != null) {
         if (iterator.getClass().getName().equals(name)) result.add(iterator);
         iterator = iterator.getNext();
      }
      return result;
   }

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      return result;
   }


   public String toString() {
      StringBuilder sb = new StringBuilder();
      CommandInterceptor i = firstInChain;
      while (i != null) {
         sb.append("\n\t>> ");
         sb.append(i.getClass().getName());
         i = i.getNext();
      }
      return sb.toString();
   }

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   /**
    * Checks whether the chain contains the supplied interceptor instance.
    */
   public boolean containsInstance(CommandInterceptor interceptor) {
      CommandInterceptor it = firstInChain;
      while (it != null) {
         if (it == interceptor) return true;
         it = it.getNext();
      }
      return false;
   }

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      }
      return false;
   }


   public synchronized boolean containsInterceptorType(Class<? extends CommandInterceptor> interceptorType) {
      CommandInterceptor it = firstInChain;
      while (it != null) {
         if (it.getClass().equals(interceptorType)) return true;
         it = it.getNext();
      }
      return false;
   }

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public class InterceptorChainFactory extends AbstractNamedCacheComponentFactory implements AutoInstantiableFactory {


   private static final Log log = LogFactory.getLog(InterceptorChainFactory.class);


   private CommandInterceptor createInterceptor(CommandInterceptor interceptor, Class<? extends CommandInterceptor> interceptorType) {
      CommandInterceptor chainedInterceptor = componentRegistry.getComponent(interceptorType);
      if (chainedInterceptor == null) {
         chainedInterceptor = interceptor;
         register(interceptorType, chainedInterceptor);
      } else {
         // wipe next/last chaining!!
         chainedInterceptor.setNext(null);
      }
      return chainedInterceptor;
   }

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            break;
         case LOCAL:
            //Nothing...
      }


      CommandInterceptor callInterceptor = createInterceptor(new CallInterceptor(), CallInterceptor.class);
      interceptorChain.appendInterceptor(callInterceptor, false);
      log.trace("Finished building default interceptor chain.");
      buildCustomInterceptors(interceptorChain, configuration.customInterceptors());
      return interceptorChain;
   }

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   private void buildCustomInterceptors(InterceptorChain interceptorChain, CustomInterceptorsConfiguration customInterceptors) {
      for (InterceptorConfiguration config : customInterceptors.interceptors()) {
         if (interceptorChain.containsInterceptorType(config.interceptor().getClass())) continue;


         CommandInterceptor customInterceptor = config.interceptor();
         register(customInterceptor.getClass(), customInterceptor);
         if (config.first())
            interceptorChain.addInterceptor(customInterceptor, 0);
         else if (config.last())
            interceptorChain.appendInterceptor(customInterceptor, true);
         else if (config.index() >= 0)

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 */
@DefaultFactoryFor(classes = InterceptorChain.class)
public class InterceptorChainFactory extends AbstractNamedCacheComponentFactory implements AutoInstantiableFactory {


   public CommandInterceptor createInterceptor(Class<? extends CommandInterceptor> clazz) {
      CommandInterceptor chainedInterceptor = componentRegistry.getComponent(clazz);
      if (chainedInterceptor == null) {
         chainedInterceptor = Util.getInstance(clazz);
         try {
            componentRegistry.registerComponent(chainedInterceptor, clazz);
         }
         catch (RuntimeException e) {
            log.warn("Problems creating interceptor " + clazz);
            throw e;
         }
      } else {
         // wipe next/last chaining!!
         chainedInterceptor.setNext(null);
      }
      return chainedInterceptor;
   }

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