/// <summary>
/// Sends the callback for a read request.
/// </summary>
private bool SendCallback(
int transactionId,
TransationType transactionType,
List<HdaReadRequest> requests)
{
try
{
IComHdaDataCallback callback = m_callback;
if (callback == null)
{
return false;
}
switch (transactionType)
{
case TransationType.Read:
{
callback.OnReadComplete(transactionId, requests);
break;
}
case TransationType.ReadModified:
{
callback.OnReadModifiedComplete(transactionId, requests);
break;
}
case TransationType.ReadAttribute:
{
callback.OnReadAttributeComplete(transactionId, requests);
break;
}
case TransationType.ReadAnnotation:
{
callback.OnReadAnnotations(transactionId, requests);
break;
}
}
return true;
}
catch (Exception e)
{
Utils.Trace(e, "Unexpected error sending callback to HDA client.");
return false;
}
}
/// <summary>
/// Sends the callback for a read request.
/// </summary>
private bool SendCallback(
int transactionId,
TransationType transactionType,
List<HdaUpdateRequest> requests)
{
try
{
IComHdaDataCallback callback = m_callback;
if (callback == null)
{
return false;
}
switch (transactionType)
{
case TransationType.Update:
case TransationType.DeleteRaw:
case TransationType.DeleteAtTime:
{
callback.OnUpdateComplete(transactionId, requests);
break;
}
case TransationType.InsertAnnotation:
{
callback.OnInsertAnnotations(transactionId, requests);
break;
}
}
return true;
}
catch (Exception e)
{
Utils.Trace(e, "Unexpected error sending callback to HDA client.");
return false;
}
}
/// <summary>
/// Creates and queues a new transaction.
/// </summary>
private int[] CreateTransaction(
TransationType transationType,
int transactionId,
ExtensionObject details,
List<HdaReadRequest> requests,
bool asyncReportErrors,
out int cancelId)
{
lock (Lock)
{
cancelId = ++m_lastCancelId;
// create the transaction.
ReadRequestTransaction transaction = new ReadRequestTransaction();
transaction.TransationType = transationType;
transaction.TransactionId = transactionId;
transaction.CancelId = cancelId;
transaction.Details = details;
transaction.Requests = new List<HdaReadRequest>();
// keep only the valid requests.
int[] errors = new int[requests.Count];
for (int ii = 0; ii < requests.Count; ii++)
{
if (!asyncReportErrors)
{
errors[ii] = requests[ii].Error;
if (errors[ii] < 0)
{
continue;
}
}
transaction.Requests.Add(requests[ii]);
}
// queue the transaction.
if (transaction.Requests.Count > 0)
{
m_transactions.Add(transaction.CancelId, transaction);
ThreadPool.QueueUserWorkItem(DoRead, transaction);
}
// return the error list.
return errors;
}
}
/// <summary>
/// Creates and queues a new transaction.
/// </summary>
private int[] CreateTransaction(
TransationType transationType,
int transactionId,
List<HdaUpdateRequest> requests,
out int cancelId)
{
lock (Lock)
{
cancelId = ++m_lastCancelId;
// create the transaction.
UpdateRequestTransaction transaction = new UpdateRequestTransaction();
transaction.TransationType = transationType;
transaction.TransactionId = transactionId;
transaction.CancelId = cancelId;
transaction.Requests = new List<HdaUpdateRequest>();
// keep only the valid requests.
int[] errors = new int[requests.Count];
for (int ii = 0; ii < requests.Count; ii++)
{
errors[ii] = requests[ii].Error;
if (errors[ii] < 0)
{
continue;
}
transaction.Requests.Add(requests[ii]);
}
// queue the transaction.
if (transaction.Requests.Count > 0)
{
m_transactions.Add(transaction.CancelId, transaction);
ThreadPool.QueueUserWorkItem(DoUpdate, transaction);
}
// return the error list.
return errors;
}
}
