Examples of org.jboss.cache.Node

org.jboss.cache.Node
A Node is a {@link Fqn named} logical grouping of data in the JBoss {@link Cache}. A node should be used to contain data for a single data record, for example information about a particular person or account.
One purpose of grouping cache data into separate nodes is to minimize transaction locking interference, and increase concurrency. So for example, when multiple threads or possibly distributed caches are acccessing different accounts simultaneously.
Another is that when making changes to this node, its data might be kept in a single database row or file on disk. (Persisted via the use of a {@link org.jboss.cache.loader.CacheLoader}.)
A node has references to its children, parent (each node except the root - defined by {@link Fqn#ROOT} - hasa single parent) and data contained within the node (as key/value pairs). The data access methods are similar to the collections {@link Map} interface,but some are read-only or return copies of the underlying the data.
@author Manik Surtani (manik AT jboss DOT org) @see Cache @since 2.0.0

   }


   public void testLazyLoadingOnNodeRemoveChild() throws Exception
   {
      cache.getTransactionManager().begin();
      Node node = cache.getRoot().getChild(parent);
      node.removeChild(child.getLastElement());
      assert !node.hasChild(child.getLastElement()) : "Node should have removed child";
      WorkspaceNode n = getWorkspaceNode(parent);
      assert !n.isChildrenLoaded() : "Should not have loaded children";
      cache.getTransactionManager().commit();
   }

View Full Code Here

      assertDataLoaded(child);
      cache.get(child, "foo2"); // does not exist, will trigger a load
      assertDataLoaded(child);


      // should not load
      Node node = cache.getRoot().getChild(parent);
      assertDataLoaded(child);
      assertDataNotLoaded(parent);


      // needs to load children at this stage in case there are other children that have been evicted.
      Set children = node.getChildren(); //getchildrennames /parent
      assertEquals(1, children.size());
      assertDataLoaded(child);
      cache.get(child, "foo"); //get /parent/child
      assertDataLoaded(child);

View Full Code Here

      // evict the parent
      cache.evict(parent, false);
      assertNull(cache.peek(parent, false));


      // now get node.
      Node n = cache.getRoot().getChild(parent);
      assertNotNull(n);
      assertDataNotLoaded(parent);


      verify(mockCacheLoader);
   }

View Full Code Here

      // evict the parent
      cache.evict(parent, false);
      assertNull(cache.peek(parent, false));


      // now get node.
      Node n = cache.getRoot().getChild(parent);
      assertNotNull(n);
      assertDataNotLoaded(parent);


      // should not load node but should change isDataLoaded to true
      // will trigger a removedata() though
      n.clearData();


      assertDataLoaded(parent);
      verify(mockCacheLoader);
   }

View Full Code Here

      return config;
   }


   public Set<?> getChildrenNames(Fqn fqn) throws Exception
   {
      Node node = delegate.getRoot().getChild(fqn);
      if (node == null) return null;


      Set cn = node.getChildrenNames();


      // the cache loader contract is a bit different from the cache when it comes to dealing with childrenNames
      if (cn.isEmpty()) return null;
      return cn;
   }

View Full Code Here

      delegate.removeNode(fqn);
   }


   public void removeData(Fqn fqn) throws Exception
   {
      Node node = delegate.getRoot().getChild(fqn);
      if (node != null) node.clearData();
   }

View Full Code Here

      int maxCountBase = 0;
      int maxCountData = 0;
      boolean sawBaseDecrease = false;
      boolean sawDataDecrease = false;
      long start = System.currentTimeMillis();
      Node root = cache2.getRoot();
      while ((System.currentTimeMillis() - start) < 10000)
      {
         parent = root.getChild(Fqn.fromString("/org/jboss/test/data"));
         children = parent.getChildren();
         if (children != null)
         {
            int dataCount = children.size();
            if (dataCount < maxCountData)

View Full Code Here

      cache.getConfiguration().setCacheMode(Configuration.CacheMode.LOCAL);
      cache.getConfiguration().setIsolationLevel(IsolationLevel.NONE);
      cache.start();
      cache.put(FQN, KEY, VALUE);
      cache.put(FQN + "/d", KEY, VALUE);
      Node node = cache.peek(FQN, false, false);
      assertTrue(node != null && node.getKeys().contains(KEY));
      assertEquals(VALUE, cache.get(FQN, KEY));
      assertEquals(0, cache.getNumberOfLocksHeld());
   }

View Full Code Here

      cache.getConfiguration().setTransactionManagerLookupClass(TransactionSetup.getManagerLookup());
      cache.start();
      tm = startTransaction();
      cache.put(FQN, KEY, VALUE);
      cache.put(FQN + "/d", KEY, VALUE);
      Node node = cache.peek(FQN, false, false);
      assertTrue(node != null && node.getKeys().contains(KEY));
      assertEquals(VALUE, cache.get(FQN, KEY));
      assertEquals(0, cache.getNumberOfLocksHeld());
      tm.commit();
   }

View Full Code Here

      cache.getConfiguration().setTransactionManagerLookupClass(TransactionSetup.getManagerLookup());
      cache.start();
      tm = startTransaction();
      cache.put(FQN, KEY, VALUE);
      cache.put(FQN + "/d", KEY, VALUE);
      Node node = cache.peek(FQN, false, false);
      assertTrue(node != null && node.getKeys().contains(KEY));
      assertEquals(VALUE, cache.get(FQN, KEY));
      assertEquals(5, cache.getNumberOfLocksHeld());
      tm.commit();
   }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of org.jboss.cache.Node

com.kylin.jbosscache.api.CacheAPITest

com.kylin.jbosscache.api.NodeNameTest

com.kylin.jbosscache.custom.service.JBossCacheSession

com.kylin.jbosscache.demo.JBossCacheConsole

EDU.oswego.cs.dl.util.concurrent.ConcurrentReaderHashMap

jboss.test.TestCacheBean

org.hibernate.cache.jbc.BasicRegionAdapter

org.hibernate.cache.jbc.util.CacheHelper

org.hibernate.cache.jbc2.BasicRegionAdapter

org.hibernate.cache.jbc2.util.CacheHelper

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.