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


   @Test(groups = "functional", expectedExceptions = { CacheException.class })
   public void testSyncReplTimeout() {
      AdvancedCache cache1 = cache(0, "syncReplCache").getAdvancedCache();
      AdvancedCache cache2 = cache(1, "syncReplCache").getAdvancedCache();
      cache2.addInterceptor(new CommandInterceptor() {
         @Override
         protected Object handleDefault(InvocationContext ctx, VisitableCommand cmd)
                  throws Throwable {
            // Add a delay
            Thread.sleep(100);

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         assertValue(1, i, expected);
      }


      final CountDownLatch applyStateProceedLatch = new CountDownLatch(1);
      final CountDownLatch applyStateStartedLatch = new CountDownLatch(1);
      cacheConfigBuilder.customInterceptors().addInterceptor().before(InvocationContextInterceptor.class).interceptor(new CommandInterceptor() {
         @Override
         protected Object handleDefault(InvocationContext ctx, VisitableCommand cmd) throws Throwable {
            // if this 'put' command is caused by state transfer we delay it to ensure other cache operations
            // are performed first and create opportunity for inconsistencies
            if (cmd instanceof PutKeyValueCommand && ((PutKeyValueCommand) cmd).hasFlag(Flag.PUT_FOR_STATE_TRANSFER)) {

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         assertEquals("before_st_" + i, cache(2).get(i));
      }


      final CountDownLatch applyStateProceedLatch = new CountDownLatch(1);
      final CountDownLatch applyStateStartedLatch1 = new CountDownLatch(1);
      advancedCache(0).addInterceptor(new CommandInterceptor() {
         @Override
         protected Object handleDefault(InvocationContext ctx, VisitableCommand cmd) throws Throwable {
            // if this 'put' command is caused by state transfer we delay it to ensure other cache operations
            // are performed first and create opportunity for inconsistencies
            if (cmd instanceof PutKeyValueCommand && ((PutKeyValueCommand) cmd).hasFlag(Flag.PUT_FOR_STATE_TRANSFER)) {
               // signal we encounter a state transfer PUT
               applyStateStartedLatch1.countDown();
               // wait until it is ok to apply state
               if (!applyStateProceedLatch.await(15, TimeUnit.SECONDS)) {
                  throw new TimeoutException();
               }
            }
            return super.handleDefault(ctx, cmd);
         }
      }, 0);


      final CountDownLatch applyStateStartedLatch2 = new CountDownLatch(1);
      advancedCache(2).addInterceptor(new CommandInterceptor() {
         @Override
         protected Object handleDefault(InvocationContext ctx, VisitableCommand cmd) throws Throwable {
            // if this 'put' command is caused by state transfer we delay it to ensure other cache operations
            // are performed first and create opportunity for inconsistencies
            if (cmd instanceof PutKeyValueCommand && ((PutKeyValueCommand) cmd).hasFlag(Flag.PUT_FOR_STATE_TRANSFER)) {

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    * @param interceptor the first interceptor in the new chain.
    */
   public static void replaceInterceptorChain(Cache cache, CommandInterceptor interceptor) {
      ComponentRegistry cr = extractComponentRegistry(cache);
      // make sure all interceptors here are wired.
      CommandInterceptor i = interceptor;
      do {
         cr.wireDependencies(i);
      }
      while ((i = i.getNext()) != null);


      InterceptorChain inch = cr.getComponent(InterceptorChain.class);
      inch.setFirstInChain(interceptor);
   }

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    * @return true if the interceptor was replaced
    */
   public static boolean replaceInterceptor(Cache cache, CommandInterceptor replacingInterceptor, Class<? extends CommandInterceptor> toBeReplacedInterceptorType) {
      ComponentRegistry cr = extractComponentRegistry(cache);
      // make sure all interceptors here are wired.
      CommandInterceptor i = replacingInterceptor;
      do {
         cr.wireDependencies(i);
      }
      while ((i = i.getNext()) != null);
      InterceptorChain inch = cr.getComponent(InterceptorChain.class);
      return inch.replaceInterceptor(replacingInterceptor, toBeReplacedInterceptorType);
   }

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      LocalTransaction localTx = txTable.getLocalTransaction(tm(c1).getTransaction());
      txCoordinator.prepare(localTx);


      // Delay the commit on the remote node. Can't used blockNewTransactions because we don't want a StateTransferInProgressException
      InterceptorChain c2ic = TestingUtil.extractComponent(c2, InterceptorChain.class);
      c2ic.addInterceptorBefore(new CommandInterceptor() {
         protected Object handleDefault(InvocationContext ctx, VisitableCommand command) throws Throwable {
            if (command instanceof CommitCommand) {
               Thread.sleep(3000);
            }
            return super.handleDefault(ctx, command);

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


      if (isUsingMarshalledValues(configuration)) {
         CommandInterceptor interceptor;
            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 {
            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);
         }
      }


      // This needs to be added after the locking interceptor (for tx caches) but before the wrapping interceptor.
      if (configuration.clustering().l1().enabled()) {
         interceptorChain.appendInterceptor(createInterceptor(new L1LastChanceInterceptor(), L1LastChanceInterceptor.class), false);
      }


      if (configuration.clustering().hash().groups().enabled()) {
         interceptorChain.appendInterceptor(createInterceptor(new GroupingInterceptor(), GroupingInterceptor.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.persistence().usingStores()) {
         if (configuration.persistence().passivation()) {
            if (configuration.clustering().cacheMode().isClustered())
               interceptorChain.appendInterceptor(createInterceptor(new ClusteredActivationInterceptor(), ClusteredActivationInterceptor.class), false);
            else
               interceptorChain.appendInterceptor(createInterceptor(new ActivationInterceptor(), ActivationInterceptor.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:
               case REPL_SYNC:
               case REPL_ASYNC:
                  interceptorChain.appendInterceptor(createInterceptor(new DistCacheWriterInterceptor(), DistCacheWriterInterceptor.class), false);
                  break;
               default:
                  interceptorChain.appendInterceptor(createInterceptor(new CacheWriterInterceptor(), CacheWriterInterceptor.class), false);
                  break;
            }
         }
      }


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


      if (configuration.clustering().l1().enabled()) {
         if (configuration.transaction().transactionMode().isTransactional()) {
            interceptorChain.appendInterceptor(createInterceptor(new L1TxInterceptor(), L1TxInterceptor.class), false);
         }
         else {
            interceptorChain.appendInterceptor(createInterceptor(new L1NonTxInterceptor(), L1NonTxInterceptor.class), false);
         }
      }


      switch (configuration.clustering().cacheMode()) {
         case INVALIDATION_SYNC:
         case INVALIDATION_ASYNC:
            interceptorChain.appendInterceptor(createInterceptor(new InvalidationInterceptor(), InvalidationInterceptor.class), false);
            break;
         case DIST_SYNC:
         case REPL_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:
         case REPL_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 {
               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();
         SecurityActions.applyProperties(customInterceptor, config.properties());
         register(customInterceptor.getClass(), customInterceptor);
         if (config.first())
            interceptorChain.addInterceptor(customInterceptor, 0);
         else if (config.last())
            interceptorChain.addInterceptorBefore(customInterceptor, CallInterceptor.class, true);
         else if (config.index() >= 0)

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      assert found.get(0).equals(person1);
      StaticTestingErrorHandler.assertAllGood(cache1, cache2);
   }


   private void assertQueryInterceptorPresent(Cache<?, ?> c) {
      CommandInterceptor i = TestingUtil.findInterceptor(c, QueryInterceptor.class);
      assert i != null : "Expected to find a QueryInterceptor, only found "
               + c.getAdvancedCache().getInterceptorChain();
   }

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