Examples of org.dspace.app.xmlui.utils.DSpaceValidity

org.dspace.app.xmlui.utils.DSpaceValidity
This is a validity object specifically implemented for the caching needs of DSpace, Manakin, and Cocoon. The basic idea is that each time a DSpace object rendered by a cocoon component the object and everything about it that makes it unique should be reflected in the validity object for the component. By following this principle if the object has been updated externally then the cache will be invalidated. This DSpaceValidity object makes this processes easier by abstracting out the processes of determining what is unique about a DSpace object. A class is expected to create a new DSpaceValidity object and add() to it all DSpaceObjects that are rendered by the component. This validity object will serialize all those objects to a string, take a hash of the string and compare the hash of the string for any updates. @author Scott Phillips

    {
      if (this.validity == null)
      {
          try
          {
              DSpaceValidity validity = new DSpaceValidity();
              
              DSpaceObject scope = getScope();
              validity.add(scope);
              
              performSearch();


                validity.add("total:"+queryResults.getHitCount());
                validity.add("start:"+queryResults.getStart());
              
              @SuppressWarnings("unchecked") // This cast is correct
              java.util.List<String> handles = queryResults.getHitHandles();
              for (String handle : handles)
              {
                  DSpaceObject resultDSO = HandleManager.resolveToObject(context, handle);
                  validity.add(resultDSO);
              }
              
              this.validity = validity.complete();
            }
            catch (RuntimeException re)
            {
                throw re;
            }

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                    return null;
                }
  
              collection = (Collection) dso;
  
              DSpaceValidity validity = new DSpaceValidity();
              
              // Add the actual collection;
              validity.add(collection);
  
              this.validity = validity.complete();
          }
          catch (Exception e)
          {
              // Just ignore all errors and return an invalid cache.
          }

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                    return null;
                }


              collection = (Collection) dso;


              DSpaceValidity validity = new DSpaceValidity();


              // Add the actual collection;
              validity.add(collection);


              // add recently submitted items
              for(BrowseItem item : getRecentlySubmittedItems(collection))
              {
                  validity.add(item);
              }


              this.validity = validity.complete();
          }
          catch (Exception e)
          {
              // Just ignore all errors and return an invalid cache.
          }

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                    return null;
                }
              
              community = (Community) dso;
              
              DSpaceValidity validity = new DSpaceValidity();
              validity.add(community);
              
              Community[] subCommunities = community.getSubcommunities();
              Collection[] collections = community.getCollections();
              // Sub communities
              for (Community subCommunity : subCommunities)
              {
                  validity.add(subCommunity);
                  
                  // Include the item count in the validity, only if the value is shown.
                  boolean showCount = ConfigurationManager.getBooleanProperty("webui.strengths.show");
                  if (showCount)
              {
                      try {  
                        int size = new ItemCounter(context).getCount(subCommunity);
                        validity.add("size:"+size);
                      } catch(ItemCountException e) { /* ignore */ }
              }
              }
              // Sub collections
              for (Collection collection : collections)
              {
                  validity.add(collection);
                  
                  // Include the item count in the validity, only if the value is shown.
                  boolean showCount = ConfigurationManager.getBooleanProperty("webui.strengths.show");
                  if (showCount)
              {
                      try {
                        int size = new ItemCounter(context).getCount(collection);
                        validity.add("size:"+size);
                      } catch(ItemCountException e) { /* ignore */ }
              }
              }


              this.validity = validity.complete();
          } 
          catch (Exception e)
          {
              // Ignore all errors and invalidate the cache.
          }

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        if (this.validity == null)
      {
          try {
              dso = HandleUtil.obtainHandle(objectModel);


              DSpaceValidity validity = new DSpaceValidity();
              validity.add(dso);
              this.validity =  validity.complete();
          }
          catch (Exception e)
          {
              // Ignore all errors and just invalidate the cache.
          }

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    public SourceValidity getValidity()
    {
      if (validity == null)
      {
          try {
              DSpaceValidity validity = new DSpaceValidity();
              
              TreeNode root = buildTree(Community.findAllTop(context));
              
              Stack<TreeNode> stack = new Stack<TreeNode>();
              stack.push(root);
              
              while (!stack.empty())
              {
                  TreeNode node = stack.pop();
                  
                  validity.add(node.getDSO());
                  
                  // If we are configured to use collection strengths (i.e. item counts) then include that number in the validity.
                  boolean showCount = ConfigurationManager.getBooleanProperty("webui.strengths.show");
                  if (showCount)
              {
                      try
                      {  //try to determine Collection size (i.e. # of items)
                        
                        int size = new ItemCounter(context).getCount(node.getDSO());
                        validity.add("size:"+size);
                      }
                      catch(ItemCountException e) { /* ignore */ }
              }
                  
                  
                  for (TreeNode child : node.getChildren())
                  {
                      stack.push(child);
                  }
              }
              
              // Check if we are configured to assume validity.
              String assumeCacheValidity = ConfigurationManager.getProperty("xmlui.community-list.cache");
              if (assumeCacheValidity != null)
                {
                    validity.setAssumedValidityDelay(assumeCacheValidity);
                }
              
              this.validity = validity.complete();
          } 
          catch (SQLException sqle) 
          {
              // ignore all errors and return an invalid cache.
          }

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     */
    public SourceValidity getValidity() {
        if (this.validity == null) {


            try {
                DSpaceValidity validity = new DSpaceValidity();


                DSpaceObject dso = HandleUtil.obtainHandle(objectModel);


                if (dso != null) {
                    // Add the actual collection;
                    validity.add(dso);
                }


                // add recently submitted items, serialize solr query contents.
                DiscoverResult response = getQueryResponse(dso);


                validity.add("numFound:" + response.getDspaceObjects().size());


                for (DSpaceObject resultDso : response.getDspaceObjects()) {
                    validity.add(resultDso);
                }


                for (String facetField : response.getFacetResults().keySet()) {
                    validity.add(facetField);


                    List<DiscoverResult.FacetResult> facetValues = response.getFacetResults().get(facetField);
                    for (DiscoverResult.FacetResult facetValue : facetValues) {
                        validity.add(facetValue.getAsFilterQuery() + facetValue.getCount());
                    }
                }




                this.validity = validity.complete();
            }
            catch (Exception e) {
                // Just ignore all errors and return an invalid cache.
            }

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  public SourceValidity getValidity() {
    if (this.validity == null) {
      // Only use the DSpaceValidity object is someone is logged in.
      if (context.getCurrentUser() != null) {
        try {
          DSpaceValidity validity = new DSpaceValidity();


          validity.add(eperson);


          Group[] groups = Group.allMemberGroups(context, eperson);
          for (Group group : groups) {
            validity.add(group);
          }


          this.validity = validity.complete();
        } catch (SQLException sqle) {
          // Just ignore it and return invalid.
        }
      } else {
        this.validity = NOPValidity.SHARED_INSTANCE;

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    {
        if (validity == null)
        {
            try
            {
                DSpaceValidity newValidity = new DSpaceValidity();
                DSpaceObject dso = HandleUtil.obtainHandle(objectModel);


                if (dso != null)
                {
                    newValidity.add(dso);
                }


                BrowseInfo info = getBrowseInfo();


                // Are we browsing items, or unique metadata?
                if (isItemBrowse(info))
                {
                    // Add the browse items to the validity
                    for (BrowseItem item : (java.util.List<BrowseItem>) info.getResults())
                    {
                        newValidity.add(item);
                    }
                }
                else
                {
                    // Add the metadata to the validity
                    for (String[] singleEntry : browseInfo.getStringResults())
                    {
                        newValidity.add(singleEntry[0]+"#"+singleEntry[1]);
                    }
                }


                validity = newValidity;
            }

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    public SourceValidity getValidity() {
        if (this.validity == null) {


            try {
                DSpaceObject dso = HandleUtil.obtainHandle(objectModel);
                DSpaceValidity val = new DSpaceValidity();


                // Retrieve any facet results to add to the validity key
                performSearch();


                // Add the actual collection;
                if (dso != null)
                {
                    val.add(dso);
                }


                val.add("numFound:" + queryResults.getDspaceObjects().size());


                for (DSpaceObject resultDso : queryResults.getDspaceObjects()) {
                    val.add(resultDso);
                }


                for (String facetField : queryResults.getFacetResults().keySet()) {
                    val.add(facetField);


                    java.util.List<DiscoverResult.FacetResult> facetValues = queryResults.getFacetResults().get(facetField);
                    for (DiscoverResult.FacetResult facetValue : facetValues) {
                        val.add(facetField + facetValue.getAsFilterQuery() + facetValue.getCount());
                    }
                }


                this.validity = val.complete();
            }
            catch (Exception e) {
                log.error(e.getMessage(),e);
            }
            //TODO: dependent on tags as well :)

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