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

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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      // load the tx interceptor
      if (configuration.transaction().transactionMode().isTransactional())
         interceptorChain.appendInterceptor(createInterceptor(new TxInterceptor(), TxInterceptor.class), false);


      if (isUsingMarshalledValues(configuration)) {
         CommandInterceptor interceptor;
         if (configuration.storeAsBinary().defensive()) {
            interceptor = createInterceptor(
                  new DefensiveMarshalledValueInterceptor(), DefensiveMarshalledValueInterceptor.class);
         } else {
            interceptor = createInterceptor(
                  new MarshalledValueInterceptor(), MarshalledValueInterceptor.class);
         }


         interceptorChain.appendInterceptor(interceptor, false);
      }




      interceptorChain.appendInterceptor(createInterceptor(new NotificationInterceptor(), NotificationInterceptor.class), false);


      if (configuration.transaction().useEagerLocking()) {
         configuration.transaction().lockingMode(LockingMode.PESSIMISTIC);
      }


      //the total order protocol doesn't need locks
      if (!isTotalOrder) {
         if (configuration.transaction().transactionMode().isTransactional()) {
            if (configuration.transaction().lockingMode() == LockingMode.PESSIMISTIC) {
               interceptorChain.appendInterceptor(createInterceptor(new PessimisticLockingInterceptor(), PessimisticLockingInterceptor.class), false);
            } else {
               interceptorChain.appendInterceptor(createInterceptor(new OptimisticLockingInterceptor(), OptimisticLockingInterceptor.class), false);
            }
         } else {
            if (configuration.locking().supportsConcurrentUpdates())
               interceptorChain.appendInterceptor(createInterceptor(new NonTransactionalLockingInterceptor(), NonTransactionalLockingInterceptor.class), false);
         }
      }


      if (configuration.sites().hasEnabledBackups() && !configuration.sites().disableBackups()) {
         if ((configuration.transaction().transactionMode() == TransactionMode.TRANSACTIONAL)) {
            if (configuration.transaction().lockingMode() == LockingMode.OPTIMISTIC) {
               interceptorChain.appendInterceptor(createInterceptor(new OptimisticBackupInterceptor(), OptimisticBackupInterceptor.class), false);
            } else {
               interceptorChain.appendInterceptor(createInterceptor(new PessimisticBackupInterceptor(), PessimisticBackupInterceptor.class), false);
            }
         } else {
            interceptorChain.appendInterceptor(createInterceptor(new NonTransactionalBackupInterceptor(), NonTransactionalBackupInterceptor.class), false);
         }
      }


      if (needsVersionAwareComponents && configuration.clustering().cacheMode().isClustered()) {
         if (isTotalOrder) {
            interceptorChain.appendInterceptor(createInterceptor(new TotalOrderVersionedEntryWrappingInterceptor(),
                                                                 TotalOrderVersionedEntryWrappingInterceptor.class), false);
         } else {
            interceptorChain.appendInterceptor(createInterceptor(new VersionedEntryWrappingInterceptor(), VersionedEntryWrappingInterceptor.class), false);
         }
      } else
         interceptorChain.appendInterceptor(createInterceptor(new EntryWrappingInterceptor(), EntryWrappingInterceptor.class), false);


      if (configuration.loaders().usingCacheLoaders()) {
         if (configuration.loaders().passivation()) {
            if (configuration.clustering().cacheMode().isClustered())
               interceptorChain.appendInterceptor(createInterceptor(new ClusteredActivationInterceptor(), ClusteredActivationInterceptor.class), false);
            else
               interceptorChain.appendInterceptor(createInterceptor(new ActivationInterceptor(), ActivationInterceptor.class), false);
            interceptorChain.appendInterceptor(createInterceptor(new PassivationInterceptor(), PassivationInterceptor.class), false);
         } else {
            if (configuration.clustering().cacheMode().isClustered())
               interceptorChain.appendInterceptor(createInterceptor(new ClusteredCacheLoaderInterceptor(), ClusteredCacheLoaderInterceptor.class), false);
            else
               interceptorChain.appendInterceptor(createInterceptor(new CacheLoaderInterceptor(), CacheLoaderInterceptor.class), false);
            switch (configuration.clustering().cacheMode()) {
               case DIST_SYNC:
               case DIST_ASYNC:
                  interceptorChain.appendInterceptor(createInterceptor(new DistCacheStoreInterceptor(), DistCacheStoreInterceptor.class), false);
                  break;
               default:
                  interceptorChain.appendInterceptor(createInterceptor(new CacheStoreInterceptor(), CacheStoreInterceptor.class), false);
                  break;
            }
         }
      }


      if (configuration.deadlockDetection().enabled() && !isTotalOrder) {
         interceptorChain.appendInterceptor(createInterceptor(new DeadlockDetectingInterceptor(), DeadlockDetectingInterceptor.class), false);
      }


      if (configuration.clustering().l1().enabled() && !configuration.transaction().transactionMode().isTransactional()) {
         interceptorChain.appendInterceptor(createInterceptor(new L1NonTxInterceptor(), L1NonTxInterceptor.class), false);
      }


      switch (configuration.clustering().cacheMode()) {
         case REPL_SYNC:
            if (needsVersionAwareComponents) {
               //added custom interceptor to replace the original
               if (isTotalOrder) {
                  interceptorChain.appendInterceptor(createInterceptor(new TotalOrderVersionedReplicationInterceptor(),
                                                                       TotalOrderVersionedReplicationInterceptor.class), false);
               } else {
                  interceptorChain.appendInterceptor(createInterceptor(new VersionedReplicationInterceptor(), VersionedReplicationInterceptor.class), false);
               }
               break;
            }
         case REPL_ASYNC:
            if (isTotalOrder) {
               interceptorChain.appendInterceptor(createInterceptor(new TotalOrderReplicationInterceptor(), TotalOrderReplicationInterceptor.class), false);
            } else {
               interceptorChain.appendInterceptor(createInterceptor(new ReplicationInterceptor(), ReplicationInterceptor.class), false);
            }
            break;
         case INVALIDATION_SYNC:
         case INVALIDATION_ASYNC:
            interceptorChain.appendInterceptor(createInterceptor(new InvalidationInterceptor(), InvalidationInterceptor.class), false);
            break;
         case DIST_SYNC:
            if (needsVersionAwareComponents) {
               if (isTotalOrder) {
                  interceptorChain.appendInterceptor(createInterceptor(new TotalOrderVersionedDistributionInterceptor(),
                                                                       TotalOrderVersionedDistributionInterceptor.class), false);
               } else {
                  interceptorChain.appendInterceptor(createInterceptor(new VersionedDistributionInterceptor(), VersionedDistributionInterceptor.class), false);
               }
               break;
            }
         case DIST_ASYNC:
            if (configuration.transaction().transactionMode().isTransactional()) {
               if (isTotalOrder) {
                  interceptorChain.appendInterceptor(createInterceptor(new TotalOrderDistributionInterceptor(), TotalOrderDistributionInterceptor.class), false);
               } else {
                  interceptorChain.appendInterceptor(createInterceptor(new TxDistributionInterceptor(), TxDistributionInterceptor.class), false);
               }
            } else {
               if (configuration.locking().supportsConcurrentUpdates()) {
                  interceptorChain.appendInterceptor(createInterceptor(new NonTxConcurrentDistributionInterceptor(), NonTxConcurrentDistributionInterceptor.class), false);
               } else {
                  interceptorChain.appendInterceptor(createInterceptor(new NonTxDistributionInterceptor(), NonTxDistributionInterceptor.class), false);
               }
            }
            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();
         applyProperties(customInterceptor, config.properties());
         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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            interceptor.setNext(firstInChain);
            firstInChain = interceptor;
            return;
         }
         if (firstInChain == null) return;
         CommandInterceptor it = firstInChain;
         int index = 0;
         while (it != null) {
            if (++index == position) {
               interceptor.setNext(it.getNext());
               it.setNext(interceptor);
               return;
            }
            it = it.getNext();
         }
         throw new IllegalArgumentException("Invalid index: " + index + " !");
      } finally {
         lock.unlock();
      }

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         if (firstInChain == null) return;
         if (position == 0) {
            firstInChain = firstInChain.getNext();
            return;
         }
         CommandInterceptor it = firstInChain;
         int index = 0;
         while (it != null) {
            if (++index == position) {
               if (it.getNext() == null) return; //nothing to remove
               it.setNext(it.getNext().getNext());
               return;
            }
            it = it.getNext();
         }
         throw new IllegalArgumentException("Invalid position: " + position + " !");
      } finally {
         lock.unlock();
      }

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   /**
    * Returns the number of interceptors in the chain.
    */
   public int size() {
      int size = 0;
      CommandInterceptor it = firstInChain;
      while (it != null) {
         size++;
         it = it.getNext();
      }
      return size;


   }

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    */
   public List<CommandInterceptor> asList() {
      if (firstInChain == null) return InfinispanCollections.emptyList();


      List<CommandInterceptor> retval = new LinkedList<CommandInterceptor>();
      CommandInterceptor tmp = firstInChain;
      do {
         retval.add(tmp);
         tmp = tmp.getNext();
      }
      while (tmp != null);
      return Collections.unmodifiableList(retval);
   }

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      lock.lock();
      try {
         if (isFirstInChain(clazz)) {
            firstInChain = firstInChain.getNext();
         }
         CommandInterceptor it = firstInChain.getNext();
         CommandInterceptor prevIt = firstInChain;
         while (it != null) {
            if (it.getClass() == clazz) {
               prevIt.setNext(it.getNext());
            }
            prevIt = it;
            it = it.getNext();
         }
      } finally {

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      lock.lock();
      try {
         Class<? extends CommandInterceptor> interceptorClass = toAdd.getClass();
         assertNotAdded(interceptorClass);
         validateCustomInterceptor(interceptorClass);
         CommandInterceptor it = firstInChain;
         while (it != null) {
            if (it.getClass().equals(afterInterceptor)) {
               toAdd.setNext(it.getNext());
               it.setNext(toAdd);
               return true;
            }
            it = it.getNext();
         }
         return false;
      } finally {
         lock.unlock();
      }

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         if (firstInChain.getClass().equals(beforeInterceptor)) {
            toAdd.setNext(firstInChain);
            firstInChain = toAdd;
            return true;
         }
         CommandInterceptor it = firstInChain;
         while (it.getNext() != null) {
            if (it.getNext().getClass().equals(beforeInterceptor)) {
               toAdd.setNext(it.getNext());
               it.setNext(toAdd);
               return true;
            }
            it = it.getNext();
         }
         return false;
      } finally {
         lock.unlock();
      }

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