public IList <ReadTask> ReadItems(IList <ReadRequest> values, Duration?timeout)
{
Func <Task <VTQ[]>, DataItemValue[]> f = task => {
VTQ[] vtqs = task.Result;
if (vtqs.Length != values.Count)
{
throw new Exception("ReadDataItems returned wrong number of VTQs");
}
DataItemValue[] divalues = new DataItemValue[vtqs.Length];
for (int i = 0; i < vtqs.Length; ++i)
{
divalues[i] = new DataItemValue(values[i].ID, vtqs[i]);
}
return(divalues);
};
if (ItemGroups.Length == 1 || values.Count == 1)
{
string group = ItemGroups.Length == 1 ? ItemGroups[0].ID : MapItem2GroupID[values[0].ID];
Task <VTQ[]> t = Instance.ReadDataItems(group, values, timeout);
Task <DataItemValue[]> tt = t.ContinueWith(f);
return(new ReadTask[] { new ReadTask(tt, values.Select(x => x.ID).ToArray()) });
}
else
{
return(values.GroupBy(x => MapItem2GroupID[x.ID]).Select(group => {
ReadRequest[] items = group.ToArray();
Task <VTQ[]> t = Instance.ReadDataItems(group.Key, items, timeout);
Task <DataItemValue[]> tt = t.ContinueWith(f);
return new ReadTask(tt, items.Select(x => x.ID).ToArray());
}).ToArray());
}
}
public WriteManager(IList <DataItemValue> writeRequests, Func <DataItemValue, REF> f)
{
int N = writeRequests.Count;
this.writeRequests = writeRequests;
this.failures = new List <FailedDataItemWrite>();
this.refs = new List <REF>(N);
this.mapIdx = new int[N];
for (int i = 0; i < N; ++i)
{
DataItemValue request = writeRequests[i];
try {
REF refItem = f(request);
mapIdx[refs.Count] = i;
refs.Add(refItem);
}
catch (Exception exp) {
failures.Add(new FailedDataItemWrite(request.ID, exp.Message));
}
}
}
