Examples of CacheLoader

com.gemstone.gemfire.cache.CacheLoader
javax.cache.CacheLoader
Used for read-through caching and loading data into a cache.
See {@link CacheWriter} which is the corollary for load used for write-through caching. @param < K> the type of keys handled by this loader @param < V> the type of values generated by this loader @author Greg Luck @author Yannis Cosmadopoulos @since 1.0
javax.util.jcache.CacheLoader
This class loads object into the cache with the aid of the abstract load method. Should be extended by the user to implement custom loaders, such as Database queries, Directory searches, File extraction, Net searches etc. @deprecated Will be removed and replaced with an interface. @author Frank Karlstr�m
net.sf.ehcache.loader.CacheLoader
Extends JCache CacheLoader with load methods that take an argument in addition to a key @author Greg Luck @version $Id$
net.sf.jsr107cache.CacheLoader
User should implement this CacheLoader interface to provide a loader object to load the objects into cache.
org.infinispan.loader.CacheLoader
Responsible for loading cache data from an external source @author Manik Surtani @since 4.0
org.infinispan.loaders.CacheLoader
Responsible for loading cache data from an external source @author Manik Surtani @since 4.0
org.infinispan.loaders.spi.CacheLoader
Responsible for loading cache data from an external source @author Manik Surtani @author Navin Surtani @author Tristan Tarrant @since 6.0
org.infinispan.persistence.spi.CacheLoader
Defines the logic for loading data from an external storage. The writing of data is optional and coordinated through a {@link CacheWriter}. @author Mircea Markus @since 6.0
org.jboss.cache.loader.CacheLoader
A {@link org.jboss.cache.loader.CacheLoader} implementation persists and load keys to and fromsecondary storage, such as a database or filesystem. Typically, implementations store a series of keys and values (an entire {@link Map}) under a single {@link Fqn}. Loading and saving properties of an entire {@link Map} should be atomic.
Lifecycle: First an instance of the loader is created, then the configuration ( {@link #setConfig(org.jboss.cache.config.CacheLoaderConfig.IndividualCacheLoaderConfig)}) and cache ( {@link #setCache(CacheSPI)}) are set. After this, {@link #create()} is called.Then {@link #start()} is called. When re-deployed, {@link #stop()} will becalled, followed by another {@link #start()}. Finally, when shut down, {@link #destroy()} is called, after which the loader is unusable.
An {@link org.jboss.cache.loader.AbstractCacheLoader} is provided as a convenient starting placewhen implementing your own {@link org.jboss.cache.loader.CacheLoader}.
It is important to note that all implementations are thread safe, as concurrent reads and writes, potentially even to the same {@link Fqn}, are possible.
@author Manik Surtani (manik AT jboss DOT org) @see CacheSPI @see org.jboss.cache.config.CacheLoaderConfig.IndividualCacheLoaderConfig @see org.jboss.cache.loader.AbstractCacheLoader @since 2.0.0

Examples of org.jboss.cache.loader.CacheLoader

      assertNull(loader.get(fqn));
   }


   public void testCacheLoadOnTree() throws Exception
   {
      CacheLoader loader = null;
      try
      {
         CacheSPI<Object, Object> cache = createCacheWithLoader();
         loader = cache.getCacheLoaderManager().getCacheLoader();


         TransactionManager mgr = cache.getTransactionManager();
         Transaction tx;


         // make sure the fqn is not in cache
         assertNull(cache.getNode(fqn));


         // put something in the loader and make sure all tx's can see it
         loader.put(fqn, key, value);


         // start the 1st tx
         mgr.begin();
         tx = mgr.getTransaction();
         assertEquals(value, cache.get(fqn, key));
         mgr.suspend();


         // start a new tx
         mgr.begin();
         assertEquals(value, cache.get(fqn, key));
         mgr.commit();


         mgr.resume(tx);
         assertEquals(value, cache.get(fqn, key));
         mgr.commit();
      }
      finally
      {
         // cleanup
         if (loader != null) loader.remove(fqn);
      }
   }

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Examples of org.jboss.cache.loader.CacheLoader


   public void testCacheStoring() throws Exception
   {
      Transaction tx;
      CacheSPI<Object, Object> cache = createCacheWithLoader();
      CacheLoader loader = cache.getCacheLoaderManager().getCacheLoader();


      // test the cache ...
      TransactionManager mgr = cache.getTransactionManager();
      assertNull(mgr.getTransaction());
      mgr.begin();
      cache.put(fqn, key, value);
      mgr.commit();


      assertEquals(value, cache.get(fqn, key));


      //now lets see if the state has been persisted in the cache loader
      assertEquals(value, loader.get(fqn).get(key));




      mgr.begin();
      cache.removeNode(fqn);
      mgr.commit();


      assertNull(cache.get(fqn, key));
      //now lets see if the state has been persisted in the cache loader
      assertNull(loader.get(fqn));


      mgr.begin();
      cache.put(fqn, key, value);
      tx = mgr.getTransaction();
      mgr.suspend();


      // lets see what we've got halfway within a tx
      assertNull(cache.get(fqn, key));
      assertNull(loader.get(fqn));


      mgr.resume(tx);
      mgr.commit();


      // and after committing...
      assertEquals(value, cache.get(fqn, key));
      assertEquals(value, loader.get(fqn).get(key));


      // clean up loader
      loader.remove(fqn);
   }

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Examples of org.jboss.cache.loader.CacheLoader




   public void testCacheStoringImplicitTx() throws Exception
   {
      CacheSPI<Object, Object> cache = createCacheWithLoader();
      CacheLoader loader = cache.getCacheLoaderManager().getCacheLoader();


      // test the cache ...
      TransactionManager mgr = cache.getTransactionManager();
      assertNull(mgr.getTransaction());
      cache.put(fqn, key, value);


      assertEquals(value, cache.get(fqn, key));


      //now lets see if the state has been persisted in the cache loader
      assertEquals(value, loader.get(fqn).get(key));




      cache.removeNode(fqn);


      assertNull(cache.get(fqn, key));
      //now lets see if the state has been persisted in the cache loader
      assertNull(loader.get(fqn));


      cache.put(fqn, key, value);


      assertEquals(value, cache.get(fqn, key));
      assertEquals(value, loader.get(fqn).get(key));


      // clean up loader
      loader.remove(fqn);
   }

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Examples of org.jboss.cache.loader.CacheLoader

   }


   public void testCacheStoringImplicitTxOptionOverride() throws Exception
   {
      CacheSPI<Object, Object> cache = createCacheWithLoader();
      CacheLoader loader = cache.getCacheLoaderManager().getCacheLoader();
      Option option = new Option();
      option.setCacheModeLocal(true);
      cache.getInvocationContext().setOptionOverrides(option);
      cache.put(fqn, key, value);
      assertEquals(value, cache.get(fqn, key));
      //now lets see if the state has been persisted in the cache loader
      assertNotNull(loader.get(fqn));
      assertNotNull(value, loader.get(fqn).get(key));
      cache.removeNode(fqn);
   }

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Examples of org.jboss.cache.loader.CacheLoader




   public void testCacheLoading() throws Exception
   {
      CacheSPI<Object, Object> cache = createCacheWithLoader();
      CacheLoader loader = cache.getCacheLoaderManager().getCacheLoader();


      assertNull(cache.get(fqn, key));


      // put something in the loader
      loader.put(fqn, key, value);
      assertEquals(value, loader.get(fqn).get(key));


      // test that this can now be accessed by the cache
      assertEquals(value, cache.get(fqn, key));


      // clean up loader
      loader.remove(fqn);


      // what's in the cache now?  Should not ne null...
      assertNotNull(cache.get(fqn, key));
   }

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Examples of org.jboss.cache.loader.CacheLoader

   }


   public void testCacheLoadingWithReplication() throws Exception
   {
      CacheSPI<Object, Object> cache1 = createReplicatedCacheWithLoader(false);
      CacheLoader loader1 = cache1.getCacheLoaderManager().getCacheLoader();


      CacheSPI<Object, Object> cache2 = createReplicatedCacheWithLoader(false);
      CacheLoader loader2 = cache2.getCacheLoaderManager().getCacheLoader();


      // test the cache ...
      TransactionManager mgr = cache1.getTransactionManager();
      assertNull(mgr.getTransaction());


      mgr.begin();


      // add something in cache1
      cache1.put(fqn, key, value);
      assertEquals(value, cache1.get(fqn, key));


      // test that loader1, loader2, cache2 doesnt have entry
      assertNull(loader1.get(fqn));
      assertNull(loader2.get(fqn));
      assertNull(cache2.get(fqn, key));


      // commit
      mgr.commit();


      // test that loader1, loader2, cache2 has entry
      assertEquals(value, cache1.get(fqn, key));
      assertEquals(value, loader1.get(fqn).get(key));
      assertEquals(value, loader2.get(fqn).get(key));
      assertEquals(value, cache2.get(fqn, key));


      // cache2 removes entry
      cache2.getTransactionManager().begin();
      cache2.removeNode(fqn);
      assertNull(cache2.get(fqn, key));
      // test that loader1, loader2 and cache2 have the entry
      assertEquals(value, cache1.get(fqn, key));
      assertEquals(value, loader1.get(fqn).get(key));
      assertEquals(value, loader2.get(fqn).get(key));


      // commit
      cache2.getTransactionManager().commit();


      // test that the entry has been removed everywhere.
      assertNull(cache1.getNode(fqn));
      assertNull(loader1.get(fqn));
      assertNull(loader2.get(fqn));
      assertNull(cache2.getNode(fqn));


   }

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Examples of org.jboss.cache.loader.CacheLoader

   }


   public void testSharedCacheLoadingWithReplication() throws Exception
   {
      CacheSPI<Object, Object> cache1 = createReplicatedCacheWithLoader(true);
      CacheLoader loader1 = cache1.getCacheLoaderManager().getCacheLoader();


      CacheSPI<Object, Object> cache2 = createReplicatedCacheWithLoader(true);
      CacheLoader loader2 = cache2.getCacheLoaderManager().getCacheLoader();


      // test the cache ...
      TransactionManager mgr = cache1.getTransactionManager();
      assertNull(mgr.getTransaction());


      mgr.begin();


      // add something in cache1
      cache1.put(fqn, key, value);
      assertEquals(value, cache1.get(fqn, key));


      // test that loader1, loader2, cache2 doesnt have entry
      System.out.println("*** " + loader1.get(fqn));
      assertNull(loader1.get(fqn));
      assertNull(loader2.get(fqn));
      assertNull(cache2.get(fqn, key));


      // commit
      mgr.commit();


      // test that loader1, loader2, cache2 has entry
      assertEquals(value, cache1.get(fqn, key));
      assertEquals(value, loader1.get(fqn).get(key));
      assertEquals(value, loader2.get(fqn).get(key));
      assertEquals(value, cache2.get(fqn, key));


      // cache2 removes entry
      cache2.getTransactionManager().begin();
      cache2.removeNode(fqn);
      assertNull(cache2.get(fqn, key));
      // test that loader1, loader2 and cache2 have the entry
      assertEquals(value, cache1.get(fqn, key));
      assertEquals(value, loader1.get(fqn).get(key));
      assertEquals(value, loader2.get(fqn).get(key));


      // commit
      cache2.getTransactionManager().commit();


      // test that the entry has been removed everywhere.
      assertNull(cache1.getNode(fqn));
      assertNull(loader1.get(fqn));
      assertNull(loader2.get(fqn));
      assertNull(cache2.getNode(fqn));


   }

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Examples of org.jboss.cache.loader.CacheLoader

   }


   public void testPassivationLocal() throws Exception
   {
      CacheSPI cache = createLocalCache();
      CacheLoader loader = cache.getCacheLoaderManager().getCacheLoader();


      // clean up
      cache.removeNode(fqn);
      loader.remove(fqn);


      assertNull(loader.get(fqn));


      DummyTransactionManager mgr = DummyTransactionManager.getInstance();


      // put something in the cache
      mgr.begin();
      cache.put(fqn, key, value);
      mgr.commit();


      // should be nothing in the loader
      assertEquals(value, cache.get(fqn, key));
      assertNull(loader.get(fqn));


      // evict from cache
      mgr.begin();
      cache.evict(fqn);
      mgr.commit();


      mgr.begin();
      // should now be passivated in the loader
      // don't do a cache.get() first as this will activate this node from the loader again!
      // assertNull( cache.get( fqn ) );
      assertEquals(value, loader.get(fqn).get(key));


      // now do a cache.get()...
      assertEquals(value, cache.get(fqn, key));


      // and the object should now be removed from the loader
      assertNull(loader.get(fqn));
      mgr.commit();


      // clean up
      mgr.begin();
      cache.removeNode(fqn);
      loader.remove(fqn);
      mgr.commit();


   }

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Examples of org.jboss.cache.loader.CacheLoader

    * Tests the getChildrenNames() method.
    */
   public void testGetChildrenNames()
         throws Exception
   {
      CacheLoader loader = loaderTL.get();


      checkChildren(Fqn.ROOT, null);
      checkChildren(Fqn.fromString("/key0"), null);


      loader.put(Fqn.fromString("/key0"), null);
      addDelay();
      checkChildren(Fqn.ROOT, new String[]{"key0"});


      loader.put(Fqn.fromString("/key1/x"), null);
      addDelay();
      checkChildren(Fqn.ROOT, new String[]{"key0", "key1"});
      checkChildren(Fqn.fromString("/key1"), new String[]{"x"});


      loader.remove(Fqn.fromString("/key1/x"));
      addDelay();
      checkChildren(Fqn.ROOT, new String[]{"key0", "key1"});
      checkChildren(Fqn.fromString("/key0"), null);
      checkChildren(Fqn.fromString("/key1"), null);


      loader.put(Fqn.fromString("/key0/a"), null);
      loader.put(Fqn.fromString("/key0/ab"), null);
      loader.put(Fqn.fromString("/key0/abc"), null);
      addDelay();
      checkChildren(Fqn.fromString("/key0"),
            new String[]{"a", "ab", "abc"});


      loader.put(Fqn.fromString("/key0/xxx"), null);
      loader.put(Fqn.fromString("/key0/xx"), null);
      loader.put(Fqn.fromString("/key0/x"), null);
      addDelay();
      checkChildren(Fqn.fromString("/key0"),
            new String[]{"a", "ab", "abc", "x", "xx", "xxx"});


      loader.put(Fqn.fromString("/key0/a/1"), null);
      loader.put(Fqn.fromString("/key0/a/2"), null);
      loader.put(Fqn.fromString("/key0/a/2/1"), null);
      addDelay();
      checkChildren(Fqn.fromString("/key0/a/2"), new String[]{"1"});
      checkChildren(Fqn.fromString("/key0/a"), new String[]{"1", "2"});
      checkChildren(Fqn.fromString("/key0"),
            new String[]{"a", "ab", "abc", "x", "xx", "xxx"});

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Examples of org.jboss.cache.loader.CacheLoader

    * Checks that the given list of children part names is returned.
    */
   private void checkChildren(Fqn fqn, String[] names)
         throws Exception
   {
      CacheLoader loader = loaderTL.get();


      Set set = loader.getChildrenNames(fqn);
      if (names != null)
      {
         assertEquals(names.length, set.size());
         for (int i = 0; i < names.length; i += 1)
         {

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