public int EstimateCount(Uri resourceUri, Filter filter, IEnumerable <Selector> selectors)
{
using (ClientContext <IWSEnumerationContract> ctx =
new ClientContext <IWSEnumerationContract>(_endpointUri, _binding.MessageVersion.Addressing, _proxyFactory,
mx =>
{
mx.Add(new ResourceUriHeader(resourceUri.ToString()));
mx.Add(new SelectorSetHeader(selectors));
}))
{
OperationContextProxy.Current.AddHeader(new RequestTotalItemsCountEstimate());
FilterMapExtension.Activate(_filterMap);
EnumerationModeExtension.Activate(EnumerationMode.EnumerateEPR, null);
ctx.Channel.Enumerate(new EnumerateRequest
{
EnumerationMode = EnumerationMode.EnumerateEPR,
OptimizeEnumeration = _optimize ? new OptimizeEnumeration() : null,
Filter = filter,
});
TotalItemsCountEstimate totalItemsCountEstimate =
OperationContextProxy.Current.FindHeader <TotalItemsCountEstimate>();
return(totalItemsCountEstimate.Value);
}
}
private PullResponse PullNextEPRBatch(EnumerationContextKey context, string resourceUri, int maxElements, IEnumerable <Selector> selectors)
{
using (ClientContext <IWSEnumerationContract> ctx =
new ClientContext <IWSEnumerationContract>(_endpointUri, _binding.MessageVersion.Addressing, _proxyFactory,
mx =>
{
mx.Add(new ResourceUriHeader(resourceUri));
mx.Add(new SelectorSetHeader(selectors));
}))
{
FilterMapExtension.Activate(_filterMap);
EnumerationModeExtension.Activate(EnumerationMode.EnumerateEPR, null);
return(ctx.Channel.Pull(new PullRequest
{
EnumerationContext = context,
MaxElements = new MaxElements(maxElements)
}));
}
}
public IEnumerable <EndpointAddress> EnumerateEPR(Uri resourceUri, Filter filter, int maxElements, IEnumerable <Selector> selectors)
{
EnumerateResponse response;
using (ClientContext <IWSEnumerationContract> ctx =
new ClientContext <IWSEnumerationContract>(_endpointUri, _binding.MessageVersion.Addressing, _proxyFactory,
mx =>
{
mx.Add(new ResourceUriHeader(resourceUri.ToString()));
mx.Add(new SelectorSetHeader(selectors));
}))
{
FilterMapExtension.Activate(_filterMap);
EnumerationModeExtension.Activate(EnumerationMode.EnumerateEPR, null);
response = ctx.Channel.Enumerate(new EnumerateRequest
{
EnumerationMode = EnumerationMode.EnumerateEPR,
OptimizeEnumeration = _optimize ? new OptimizeEnumeration() : null,
Filter = filter,
MaxElements = new MaxElements(maxElements)
});
}
if (response.Items != null)
{
foreach (EnumerationItem item in response.Items.Items)
{
yield return(item.EprValue);
}
}
EnumerationContextKey context = response.EnumerationContext;
bool endOfSequence = response.EndOfSequence != null;
while (!endOfSequence)
{
PullResponse pullResponse = PullNextEPRBatch(context, resourceUri.ToString(), maxElements, selectors);
foreach (EnumerationItem item in pullResponse.Items.Items)
{
yield return(item.EprValue);
}
endOfSequence = pullResponse.EndOfSequence != null;
context = pullResponse.EnumerationContext;
}
}
public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext)
{
FilterMapExtension.Activate(_map);
return(null);
}
