Examples of org.jboss.cache.optimistic.WorkspaceNode

org.jboss.cache.optimistic.WorkspaceNode
Represents a type of {@link org.jboss.cache.Node} that is to be copied into a {@link TransactionWorkspace} for optimistically lockednodes. Adds versioning and dirty flags over conventional Nodes.
Typically used when the cache mode configured is {@link org.jboss.cache.config.Configuration.NodeLockingScheme#OPTIMISTIC} @author Manik Surtani (manik AT jboss DOT org) @author Steve Woodcock (stevew@jofti.com) @since 1.3.0 @deprecated will be removed along with optimistic and pessimistic locking.

   @Override
   public Object visitGetDataMapCommand(InvocationContext ctx, GetDataMapCommand command) throws Throwable
   {
      TransactionWorkspace workspace = getTransactionWorkspace(ctx);
      Object result;
      WorkspaceNode workspaceNode = fetchWorkspaceNode(ctx, command.getFqn(), workspace, false, false);
      if (workspaceNode == null)
      {
         if (trace) log.trace("unable to find node " + command.getFqn() + " in workspace.");
         result = null;
      }
      else
      {
         notifier.notifyNodeVisited(command.getFqn(), true, ctx);
         Object data = workspaceNode.getData();
         workspace.addNode(workspaceNode);
         notifier.notifyNodeVisited(command.getFqn(), false, ctx);
         result = data;
      }
      return result;

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   @Override
   public Object visitGetChildrenNamesCommand(InvocationContext ctx, GetChildrenNamesCommand command) throws Throwable
   {
      TransactionWorkspace workspace = getTransactionWorkspace(ctx);
      Object result;
      WorkspaceNode workspaceNode = fetchWorkspaceNode(ctx, command.getFqn(), workspace, false, false);
      if (workspaceNode == null)
      {
         if (trace) log.trace("Unable to find node " + command.getFqn() + " in workspace.");
         result = null;
      }
      else
      {
         notifier.notifyNodeVisited(command.getFqn(), true, ctx);
         Object nameSet = workspaceNode.getChildrenNames();
         workspace.addNode(workspaceNode);
         notifier.notifyNodeVisited(command.getFqn(), false, ctx);
         result = nameSet;
      }
      return result;

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   @Override
   public Object visitGetNodeCommand(InvocationContext ctx, GetNodeCommand command) throws Throwable
   {
      TransactionWorkspace workspace = getTransactionWorkspace(ctx);
      Object result;
      WorkspaceNode workspaceNode = fetchWorkspaceNode(ctx, command.getFqn(), workspace, false, false);
      if (workspaceNode == null)
      {
         if (trace) log.trace("Unable to find node " + command.getFqn() + " in workspace.");
         result = null;
      }
      else if (workspaceNode.isRemoved())
      {
         if (trace) log.trace("Attempted to retrieve node " + command.getFqn() + " but it has been deleted!");
         result = null;
      }
      else
      {
         notifier.notifyNodeVisited(command.getFqn(), true, ctx);
         workspace.addNode(workspaceNode);
         notifier.notifyNodeVisited(command.getFqn(), false, ctx);
         result = workspaceNode.getNode();
      }
      return result;
   }

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      {
         log.warn("Attempting to move the root node.  Not taking any action, treating this as a no-op.");
         return;
      }


      WorkspaceNode oldParent = fetchWorkspaceNode(ctx, nodeFqn.getParent(), ws, false, true);
      if (oldParent == null) throw new NodeNotExistsException("Node " + nodeFqn.getParent() + " does not exist!");


      if (parentFqn.equals(oldParent.getFqn()))
      {
         log.warn("Attempting to move a node in same place.  Not taking any action, treating this as a no-op.");
         return;
      }
      // retrieve parent
      WorkspaceNode parent = fetchWorkspaceNode(ctx, parentFqn, ws, false, true);
      if (parent == null) throw new NodeNotExistsException("Node " + parentFqn + " does not exist!");


      Object nodeName = nodeFqn.getLastElement();


      // now that we have the parent and target nodes:
      // first correct the pointers at the pruning point
      oldParent.removeChild(nodeName);


      // parent pointer is calculated on the fly using Fqns.
      // now adjust Fqns of node and all children.
      Fqn nodeNewFqn = Fqn.fromRelativeElements(parent.getFqn(), nodeFqn.getLastElement());


      // pre-notify
      notifier.notifyNodeMoved(nodeFqn, nodeNewFqn, true, ctx);
      recursiveMoveNode(ctx, node, parent.getFqn(), ws);


      // remove old nodes. this may mark some nodes which have already been moved as deleted
      removeNode(ws, node, false, ctx);


      // post-notify

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    * @param ws      transaction workspace
    */
   private void recursiveMoveNode(InvocationContext ctx, WorkspaceNode node, Fqn newBase, TransactionWorkspace ws)
   {
      Fqn newFqn = Fqn.fromRelativeElements(newBase, node.getFqn().getLastElement());
      WorkspaceNode movedNode = fetchWorkspaceNode(ctx, newFqn, ws, true, true);
      movedNode.putAll(node.getData());


      // invoke children
      for (Object n : node.getChildrenNames())
      {
         WorkspaceNode child = fetchWorkspaceNode(ctx, Fqn.fromRelativeElements(node.getFqn(), n), ws, false, true);
         if (child != null) recursiveMoveNode(ctx, child, newFqn, ws);
      }
   }

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   {
      // it is already removed - we can ignore it
      if (workspaceNode == null) return false;


      Fqn parentFqn = workspaceNode.getFqn().getParent();
      WorkspaceNode parentNode = fetchWorkspaceNode(ctx, parentFqn, workspace, false, true);
      if (parentNode == null) throw new NodeNotExistsException("Unable to find parent node with fqn " + parentFqn);


      // pre-notify
      if (notify) notifier.notifyNodeRemoved(workspaceNode.getFqn(), true, workspaceNode.getData(), ctx);


      Fqn nodeFqn = workspaceNode.getFqn();
      parentNode.removeChild(nodeFqn.getLastElement());


      SortedMap<Fqn, WorkspaceNode> tailMap = workspace.getNodesAfter(workspaceNode.getFqn());


      for (WorkspaceNode toDelete : tailMap.values())
      {

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    * @param includeInvalidNodes
    * @return a node, if found, or null if not.
    */
   private WorkspaceNode fetchWorkspaceNode(InvocationContext ctx, Fqn fqn, TransactionWorkspace workspace, boolean undeleteIfNecessary, boolean includeInvalidNodes)
   {
      WorkspaceNode workspaceNode = workspace.getNode(fqn);
      // if we do not have the node then we need to add it to the workspace
      if (workspaceNode == null)
      {
         NodeSPI node = dataContainer.peek(fqn, true, includeInvalidNodes);
         if (node == null) return null;
         GlobalTransaction gtx = ctx.getGlobalTransaction();
         workspaceNode = lockAndCreateWorkspaceNode(nodeFactory, node, workspace, gtx, lockAcquisitionTimeout);


         // and add the node to the workspace.
         workspace.addNode(workspaceNode);
      }


      // Check that the workspace node has been marked as deleted.
      if (workspaceNode.isRemoved())
      {
         if (trace) log.trace("Node " + fqn + " has been deleted in the workspace.");
         if (undeleteIfNecessary)
         {
            undeleteWorkspaceNode(workspaceNode, fetchWorkspaceNode(ctx, fqn.getParent(), workspace, undeleteIfNecessary, includeInvalidNodes));
         }
         else if (!includeInvalidNodes)
         {
            // don't return deleted nodes if undeleteIfNecessary is false!
            workspaceNode = null;
         }
      }


      // set implicit node versioning flag.
      if (workspaceNode != null && !(workspaceNode.getVersion() instanceof DefaultDataVersion))
      {
         workspaceNode.setVersioningImplicit(false);
      }


      // now make sure all parents are in the wsp as well
      if (workspaceNode != null && !fqn.isRoot())
         fetchWorkspaceNode(ctx, fqn.getParent(), workspace, false, includeInvalidNodes);

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   }


   protected DataVersion getNodeVersion(TransactionWorkspace w, Fqn f)
   {
      if (w == null) return null;
      WorkspaceNode wn = w.getNode(f);
      if (wn == null) return null; // JBCACHE-1297
      DataVersion v = wn.getVersion();


      if (wn.isVersioningImplicit())
      {
         // then send back an incremented version
         v = ((DefaultDataVersion) v).increment();
      }

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   @Override
   public Object visitRemoveNodeCommand(InvocationContext ctx, RemoveNodeCommand command) throws Throwable
   {
      TransactionWorkspace workspace = getTransactionWorkspace(ctx);
      WorkspaceNode workspaceNode = fetchWorkspaceNode(ctx, command.getFqn(), workspace, false, true);
      if (workspaceNode != null)
      {
         setVersioning(ctx, workspace, workspaceNode);
      }
      Object result = removeNode(workspace, workspaceNode, true, ctx);

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   @Override
   public Object visitPutKeyValueCommand(InvocationContext ctx, PutKeyValueCommand command) throws Throwable
   {
      TransactionWorkspace workspace = getTransactionWorkspace(ctx);
      WorkspaceNode workspaceNode = fetchWorkspaceNode(ctx, command.getFqn(), workspace, true, true);
      if (workspaceNode != null)
      {
         setVersioning(ctx, workspace, workspaceNode);
      }
      else

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org.jboss.cache.interceptors.InvalidationInterceptor

org.jboss.cache.interceptors.OptimisticCreateIfNotExistsInterceptor

org.jboss.cache.interceptors.OptimisticInterceptor

org.jboss.cache.interceptors.OptimisticLockingInterceptor

org.jboss.cache.interceptors.OptimisticNodeInterceptor

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