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;
}
}
public Subsciption Subscribe(Filter filter,
IEnumerable<Selector> selectors,
Expires expires,
EndpointAddressBuilder susbcriptionManagerEndpointAddress)
{
PullSubscription subscription = new PullSubscription(Guid.NewGuid().ToString(), _deliveryResourceUri, _eventType, filter, expires, selectors, this);
_handler.Bind(subscription, susbcriptionManagerEndpointAddress);
_deliveryServer.AddSubscription(subscription);
_subscriptions[subscription.Identifier] = subscription;
return subscription;
}
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 EnumerationContext(string context, Filter filter, IEnumerable<Selector> selectors)
{
_context = context;
_selectors = selectors;
_filter = filter;
}
public PullSubscription(string identifier, string deliveryUri, Type eventType, Filter filter, Expires expires, IEnumerable<Selector> selectors, ISubscriptionManager manager)
: base(identifier, deliveryUri, eventType, filter, expires, selectors, manager)
{
}
private ISubscriptionManager GetManager(string resourceUri, Filter filter)
{
string dialect = (filter != null && filter.Dialect != null)
? filter.Dialect
: FilterMap.DefaultDialect;
//TODO: Fault is no existing
return _enumHandlers[new HandlerMapKey(resourceUri, dialect)];
}
private void HandleCountEnumerate(string context, Filter filter)
{
int count = GetHandler(filter).EstimateRemainingItemsCount(new EnumerationContext(context, filter, SelectorSetHeader.GetCurrent()));
OperationContextProxy.Current.AddHeader(new TotalItemsCountEstimate(count));
}
private IEnumerationRequestHandler GetHandler(Filter filter)
{
//TODO: Add fault if not found
ResourceUriHeader resourceUriHeader = OperationContextProxy.Current.FindHeader<ResourceUriHeader>();
string dialect = (filter != null && filter.Dialect != null)
? filter.Dialect
: FilterMap.DefaultDialect;
return _handlerMap[new HandlerMapKey(resourceUriHeader.ResourceUri, dialect)];
}
public int EstimateCount(Uri resourceUri, Filter filter, params Selector[] selectors)
{
return EstimateCount(resourceUri, filter, (IEnumerable<Selector>) selectors);
}
public IEnumerable<EndpointAddress> EnumerateEPR(Uri resourceUri, Filter filter, int maxElements, params Selector[] selectors)
{
return EnumerateEPR(resourceUri, filter, maxElements, (IEnumerable<Selector>)selectors);
}