private OutgoingMessage HandleCountEnumerate(IncomingMessage requestMessage, EnumerationContextKey contextKey, EnumerateRequest request, EnumerationContext context)
{
var responseMessage = CreateEnumerateResponse();
int count = GetHandler(request.Filter)
.EstimateRemainingItemsCount(context, requestMessage, responseMessage);
responseMessage.AddHeader(new TotalItemsCountEstimateHeader(count), false);
responseMessage.SetBody(new SerializerBodyWriter(new EnumerateResponse
{
EnumerationContext = contextKey
}));
return(responseMessage);
}
public static PullResponse PullNextBatch(this IMessageBuilder messageBuilder, EnumerationContextKey context, int maxElements, out IMessageBuilder nextMessageBuilder)
{
var responseMessage = messageBuilder
.WithAction(Constants.PullAction)
.AddBody(new PullRequest
{
EnumerationContext = context,
MaxElements = new MaxElements(maxElements)
})
.SendAndGetResponse(out nextMessageBuilder);
return responseMessage.GetPayload<PullResponse>();
}
private OutgoingMessage HandleNormalEnumerate(IncomingMessage requestMessage, EnumerationContextKey contextKey, EnumerateRequest request, EnumerationContext context)
{
var responseMessage = CreateEnumerateResponse();
var enumerator = GetEnumerator(request, requestMessage, context, responseMessage);
OnEnumerationStarted(context.Context, enumerator, request.EnumerationMode);
responseMessage.SetBody(
new SerializerBodyWriter(new EnumerateResponse
{
EnumerationContext = contextKey,
Expires = request.Expires
}));
return responseMessage;
}
private OutgoingMessage Enumerate(IncomingMessage requestMessage)
{
var request = requestMessage.GetPayload <EnumerateRequest>();
var contextKey = EnumerationContextKey.Unique();
var filter = CreateFilterInstance(request.Filter);
var context = new EnumerationContext(contextKey.Text, filter);
if (IsCountRequest(requestMessage))
{
return(HandleCountEnumerate(requestMessage, contextKey, request, context));
}
if (request.OptimizeEnumeration != null)
{
return(HandleOptimizedEnumerate(requestMessage, contextKey, request, context));
}
return(HandleNormalEnumerate(requestMessage, contextKey, request, context));
}
private OutgoingMessage HandleNormalEnumerate(IncomingMessage requestMessage, EnumerationContextKey contextKey, EnumerateRequest request, EnumerationContext context)
{
var responseMessage = CreateEnumerateResponse();
var enumerator = GetEnumerator(request, requestMessage, context, responseMessage);
OnEnumerationStarted(context.Context, enumerator, request.EnumerationMode);
responseMessage.SetBody(
new SerializerBodyWriter(new EnumerateResponse
{
EnumerationContext = contextKey,
Expires = request.Expires
}));
return(responseMessage);
}
private OutgoingMessage HandleOptimizedEnumerate(IncomingMessage requestMessage, EnumerationContextKey contextKey, EnumerateRequest request, EnumerationContext context)
{
var responseMessage = CreateEnumerateResponse();
var maxElements = CalculateMaxElements(request.MaxElements);
if (request.EnumerationMode == EnumerationMode.EnumerateEPR)
{
var enumerator = GetEnumerator(request, requestMessage, context, responseMessage);
bool endOfSequence;
var items = enumerator.Take(maxElements, out endOfSequence);
if (!endOfSequence)
{
OnEnumerationStarted(context.Context, enumerator, request.EnumerationMode);
}
responseMessage.SetBody(new SerializerBodyWriter(
new EnumerateResponse
{
Items = new EnumerationItemList(items, request.EnumerationMode),
EndOfSequence = endOfSequence ? new EndOfSequence() : null,
EnumerationContext = endOfSequence ? null : contextKey
}));
return(responseMessage);
}
throw new NotSupportedException();
}
private OutgoingMessage HandleOptimizedEnumerate(IncomingMessage requestMessage, EnumerationContextKey contextKey, EnumerateRequest request, EnumerationContext context)
{
var responseMessage = CreateEnumerateResponse();
var maxElements = CalculateMaxElements(request.MaxElements);
if (request.EnumerationMode == EnumerationMode.EnumerateEPR)
{
var enumerator = GetEnumerator(request, requestMessage, context, responseMessage);
bool endOfSequence;
var items = enumerator.Take(maxElements, out endOfSequence);
if (!endOfSequence)
{
OnEnumerationStarted(context.Context, enumerator, request.EnumerationMode);
}
responseMessage.SetBody(new SerializerBodyWriter(
new EnumerateResponse
{
Items = new EnumerationItemList(items, request.EnumerationMode),
EndOfSequence = endOfSequence ? new EndOfSequence() : null,
EnumerationContext = endOfSequence ? null : contextKey
}));
return responseMessage;
}
throw new NotSupportedException();
}
private OutgoingMessage HandleCountEnumerate(IncomingMessage requestMessage, EnumerationContextKey contextKey, EnumerateRequest request, EnumerationContext context)
{
var responseMessage = CreateEnumerateResponse();
int count = GetHandler(request.Filter)
.EstimateRemainingItemsCount(context, requestMessage, responseMessage);
responseMessage.AddHeader(new TotalItemsCountEstimateHeader(count), false);
responseMessage.SetBody(new SerializerBodyWriter(new EnumerateResponse
{
EnumerationContext = contextKey
}));
return responseMessage;
}
public static PullResponse PullNextBatch(this IMessageBuilder messageBuilder, EnumerationContextKey context, int maxElements, out IMessageBuilder nextMessageBuilder)
{
var responseMessage = messageBuilder
.WithAction(Constants.PullAction)
.AddBody(new PullRequest
{
EnumerationContext = context,
MaxElements = new MaxElements(maxElements)
})
.SendAndGetResponse(out nextMessageBuilder);
return(responseMessage.GetPayload <PullResponse>());
}