private async Task <IDictionary <string, CatalogItemSummary> > SaveItems(Guid commitId, DateTime commitTimeStamp, CancellationToken cancellationToken)
{
ConcurrentDictionary <string, CatalogItemSummary> pageItems = new ConcurrentDictionary <string, CatalogItemSummary>();
int batchIndex = 0;
var saveTasks = new List <Task>();
foreach (CatalogItem item in _batch)
{
ResourceSaveOperation saveOperationForItem = null;
try
{
item.TimeStamp = commitTimeStamp;
item.CommitId = commitId;
item.BaseAddress = Storage.BaseAddress;
saveOperationForItem = CreateSaveOperationForItem(Storage, Context, item, cancellationToken);
if (saveOperationForItem.SaveTask != null)
{
saveTasks.Add(saveOperationForItem.SaveTask);
}
IGraph pageContent = item.CreatePageContent(Context);
if (!pageItems.TryAdd(saveOperationForItem.ResourceUri.AbsoluteUri, new CatalogItemSummary(item.GetItemType(), commitId, commitTimeStamp, null, pageContent)))
{
throw new Exception("Duplicate page: " + saveOperationForItem.ResourceUri.AbsoluteUri);
}
batchIndex++;
}
catch (Exception e)
{
string msg = (saveOperationForItem == null || saveOperationForItem.ResourceUri == null)
? string.Format("batch index: {0}", batchIndex)
: string.Format("batch index: {0} resourceUri: {1}", batchIndex, saveOperationForItem.ResourceUri);
throw new Exception(msg, e);
}
}
await Task.WhenAll(saveTasks);
return(pageItems);
}
protected virtual ResourceSaveOperation CreateSaveOperationForItem(IStorage storage, CatalogContext context, CatalogItem item, CancellationToken cancellationToken)
{
// This method decides what to do with the item.
// Standard method of operation: if content == null, don't do a thing. Else, write content.
var content = item.CreateContent(Context); // note: always do this first
var resourceUri = item.GetItemAddress();
var operation = new ResourceSaveOperation();
operation.ResourceUri = resourceUri;
if (content != null)
{
operation.SaveTask = storage.SaveAsync(resourceUri, content, cancellationToken);
}
return(operation);
}
protected override ResourceSaveOperation CreateSaveOperationForItem(IStorage storage, CatalogContext context, CatalogItem item, CancellationToken cancellationToken)
{
// This method decides what to do with the item.
// If it's a RegistrationMakerCatalogItem and it already exists, then don't write content.
var registrationMakerCatalogItem = item as RegistrationMakerCatalogItem;
if (registrationMakerCatalogItem != null)
{
var content = item.CreateContent(Context); // note: always do this first
var resourceUri = item.GetItemAddress();
var saveOperation = new ResourceSaveOperation();
saveOperation.ResourceUri = resourceUri;
if (!registrationMakerCatalogItem.IsExistingItem && content != null)
{
saveOperation.SaveTask = storage.Save(resourceUri, content, cancellationToken);
}
else
{
Trace.WriteLine(string.Format("Resource {0} already exists. Skipping.", resourceUri), "Debug");
}
return saveOperation;
}
return base.CreateSaveOperationForItem(storage, context, item, cancellationToken);
}
protected virtual ResourceSaveOperation CreateSaveOperationForItem(IStorage storage, CatalogContext context, CatalogItem item, CancellationToken cancellationToken)
{
// This method decides what to do with the item.
// Standard method of operation: if content == null, don't do a thing. Else, write content.
var content = item.CreateContent(Context); // note: always do this first
var resourceUri = item.GetItemAddress();
var operation = new ResourceSaveOperation();
operation.ResourceUri = resourceUri;
if (content != null)
{
operation.SaveTask = storage.Save(resourceUri, content, cancellationToken);
}
return operation;
}