/// <summary>
/// Returns null if:
/// 1. Could not take a lock on the item
/// 2. Item was not available locally
///
/// When you are done editing, call CommitAsync() on the RecordItemEditOperation
/// To abort, call RecordItemEditOperation::Cancel()
///
/// </summary>
public IAsyncOperation <RecordItemEditOperation> OpenForEditAsync(ItemKey key)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
return(AsyncInfo.Run <RecordItemEditOperation>(async cancelToken =>
{
RecordItemLock rLock = this.AcquireItemLock(key);
if (rLock == null)
{
return null;
}
RecordItemEditOperation editOp = null;
try
{
editOp = await this.OpenForEditAsync(key, rLock);
return editOp;
}
finally
{
if (editOp == null)
{
rLock.Release();
}
}
}));
}
void ReleaseLock()
{
if (m_rLock != null)
{
m_rLock.Release();
m_rLock = null;
}
}