IKnowledgeSyncProvider::GetFullEnumerationChangeBatch method (winsync.h)

Article
10/13/2021

Gets a change batch that contains item metadata for items that have IDs greater than the specified lower bound, as part of a full enumeration.

Syntax

HRESULT GetFullEnumerationChangeBatch(
  [in]  DWORD                           dwBatchSize,
  [in]  const BYTE                      *pbLowerEnumerationBound,
  [in]  ISyncKnowledge                  *pSyncKnowledge,
  [out] ISyncFullEnumerationChangeBatch **ppSyncChangeBatch,
  [out] IUnknown                        **ppUnkDataRetriever
);

Parameters

[in] dwBatchSize

The number of changes to include in the change batch.

[in] pbLowerEnumerationBound

The lower bound for item IDs. This method returns changes that have IDs greater than or equal to this ID value.

[in] pSyncKnowledge

If an item change is contained in this knowledge object, data for that item already exists on the destination replica.

[out] ppSyncChangeBatch

Returns a change batch that contains item metadata for items that have IDs greater than the specified lower bound.

[out] ppUnkDataRetriever

Returns an object that can be used to retrieve change data. It can be an ISynchronousDataRetriever object or a provider-specific object.

Return value

The possible return codes include, but are not limited to, the values shown in the following table.

Return code	Description
S_OK	The method succeeded.
Provider-determined error codes

Remarks

This method enumerates, in sorted order by item ID, changes that have an item ID of pbLowerEnumerationBound or greater. This enables a synchronization session to determine which items on the destination provider have been deleted but forgotten by the source provider. Optionally, this method can also add changes to the batch, sorted by item ID, that have item ID less than pbLowerEnumerationBound and that are not contained in the destination knowledge.

Note If there are no more changes to send after this batch, ISyncChangeBatchBase::SetLastBatch must be called on the returned change batch. Otherwise, the synchronization session calls GetFullEnumerationChangeBatch again to retrieve another batch of changes.

For a provider that sends item data together with item change metadata, pSyncKnowledge can be used to determine whether it is necessary to send item data. Item data does not have to be sent when the item change is contained in pSyncKnowledge. Be aware that before it can be used to check items for containment, pSyncKnowledge must be mapped by using the ISyncKnowledge::MapRemoteToLocal method on the knowledge object that is contained in the current provider.

Requirements

Requirement	Value
Minimum supported client	Windows 7 [desktop apps only]
Minimum supported server	Windows Server 2008 R2 [desktop apps only]
Target Platform	Windows
Header	winsync.h