/// <summary>
/// Searches a resource from the client registry datastore
/// </summary>
public Bundle SearchResource(string resourceType)
{
this.ThrowIfNotReady();
// Get the services from the service registry
var auditService = ApplicationContext.Current.GetService(typeof(IAuditorService)) as IAuditorService;
// Stuff for auditing and exception handling
AuditData audit = null;
List <IResultDetail> details = new List <IResultDetail>();
FhirQueryResult result = null;
try
{
// Get query parameters
var queryParameters = WebOperationContext.Current.IncomingRequest.UriTemplateMatch.QueryParameters;
var resourceProcessor = FhirResourceHandlerUtil.GetResourceHandler(resourceType);
// Setup outgoing content
WebOperationContext.Current.OutgoingRequest.Headers.Add("Last-Modified", DateTime.Now.ToString("ddd, dd MMM yyyy HH:mm:ss zzz"));
if (resourceProcessor == null) // Unsupported resource
{
throw new FileNotFoundException();
}
// TODO: Appropriately format response
// Process incoming request
result = resourceProcessor.Query(WebOperationContext.Current.IncomingRequest.UriTemplateMatch.QueryParameters);
if (result == null || result.Outcome == ResultCode.Rejected)
{
throw new InvalidDataException("Message was rejected");
}
else if (result.Outcome != ResultCode.Accepted)
{
throw new DataException("Query failed");
}
audit = AuditUtil.CreateAuditData(result.Results);
// Create the Atom feed
return(MessageUtil.CreateBundle(result));
}
catch (Exception e)
{
audit = AuditUtil.CreateAuditData(null);
audit.Outcome = OutcomeIndicator.EpicFail;
return(this.ErrorHelper(e, result, true) as Bundle);
}
finally
{
if (auditService != null)
{
auditService.SendAudit(audit);
}
}
}
/// <summary>
/// Get a resource's history
/// </summary>
public Bundle GetResourceInstanceHistory(string resourceType, string id, string mimeType)
{
this.ThrowIfNotReady();
FhirOperationResult readResult = null;
try
{
readResult = this.PerformRead(resourceType, id, String.Empty);
WebOperationContext.Current.OutgoingResponse.Headers.Remove("Content-Disposition");
return(MessageUtil.CreateBundle(readResult));
}
catch (Exception e)
{
return(this.ErrorHelper(e, readResult, true) as Bundle);
}
}
/// <summary>
/// Reads the complete history of the specified identifier
/// </summary>
public Bundle History(string id)
{
if (String.IsNullOrEmpty(id))
{
this.m_traceSource.TraceError($"Argument {nameof(id)} null or empty");
throw new ArgumentNullException(this.m_localizationService.GetString("error.type.ArgumentNullException"));
}
Guid guidId = Guid.Empty;
if (!Guid.TryParse(id, out guidId))
{
throw new ArgumentException(this.m_localizationService.FormatString("error.type.ArgumentException", new
{
param = "id"
}));
}
var result = this.Read(guidId, Guid.Empty);
if (result == null)
{
throw new KeyNotFoundException(this.m_localizationService.GetString("error.type.KeyNotFoundException"));
}
// Results
List <TModel> results = new List <TModel>()
{
result
};
while ((result as IVersionedEntity)?.PreviousVersionKey.HasValue == true)
{
result = this.Read(guidId, (result as IVersionedEntity).PreviousVersionKey.Value);
results.Add(result);
}
// FHIR Operation result
var retVal = new FhirQueryResult(typeof(TFhirResource).Name)
{
Results = results.Select(this.MapToFhir).Select(o => new Bundle.EntryComponent()
{
Resource = o,
Response = new Bundle.ResponseComponent()
{
Status = "200"
}
}).ToList()
};
return(ExtensionUtil.ExecuteBeforeSendResponseBehavior(TypeRestfulInteraction.HistoryInstance, this.ResourceType, MessageUtil.CreateBundle(retVal, Bundle.BundleType.History)) as Bundle);
}
/// <summary>
/// Queries for a specified resource.
/// </summary>
/// <param name="parameters">The parameters.</param>
/// <returns>Returns the FHIR query result containing the results of the query.</returns>
/// <exception cref="System.ArgumentNullException">parameters</exception>
public virtual Bundle Query(System.Collections.Specialized.NameValueCollection parameters)
{
if (parameters == null)
{
this.m_traceSource.TraceError($"Argument {nameof(parameters)} null or empty");
throw new ArgumentNullException(this.m_localizationService.GetString("error.type.ArgumentNullException"));
}
Core.Model.Query.NameValueCollection hdsiQuery = null;
FhirQuery query = QueryRewriter.RewriteFhirQuery(typeof(TFhirResource), typeof(TModel), parameters, out hdsiQuery);
// Do the query
int totalResults = 0;
var predicate = QueryExpressionParser.BuildLinqExpression <TModel>(hdsiQuery);
var hdsiResults = this.Query(predicate, query.QueryId, query.Start, query.Quantity, out totalResults);
var auth = AuthenticationContext.Current;
// Return FHIR query result
if (Environment.ProcessorCount > 4)
{
hdsiResults = hdsiResults.AsParallel().AsOrdered();
}
var retVal = new FhirQueryResult(typeof(TFhirResource).Name)
{
Results = hdsiResults.Select(o =>
{
using (AuthenticationContext.EnterContext(auth.Principal))
{
return(new Bundle.EntryComponent()
{
Resource = this.MapToFhir(o),
Search = new Bundle.SearchComponent()
{
Mode = Bundle.SearchEntryMode.Match
}
});
}
}).ToList(),
Query = query,
TotalResults = totalResults
};
this.ProcessIncludes(hdsiResults, parameters, retVal);
return(ExtensionUtil.ExecuteBeforeSendResponseBehavior(TypeRestfulInteraction.SearchType, this.ResourceType, MessageUtil.CreateBundle(retVal, Bundle.BundleType.Searchset)) as Bundle);
}
/// <summary>
/// Throw an appropriate exception based on the caught exception
/// </summary>
private object ErrorHelper(Exception e, FhirOperationResult result, bool returnBundle)
{
if (result == null && returnBundle)
{
result = new FhirQueryResult()
{
Details = new List <IResultDetail>(), Query = new FhirQuery()
{
Start = 0, Quantity = 0
}
}
}
;
else if (result == null)
{
result = new FhirOperationResult()
{
Details = new List <IResultDetail>()
{
new ResultDetail(ResultDetailType.Error, "No information available", e)
}
}
}
;
this.m_tracer.TraceEvent(TraceEventType.Error, 0, e.ToString());
result.Details.Add(new ResultDetail(ResultDetailType.Error, e.Message, e));
HttpStatusCode retCode = HttpStatusCode.OK;
if (e is NotSupportedException)
{
retCode = System.Net.HttpStatusCode.MethodNotAllowed;
}
else if (e is NotImplementedException)
{
retCode = System.Net.HttpStatusCode.NotImplemented;
}
else if (e is InvalidDataException)
{
retCode = HttpStatusCode.BadRequest;
}
else if (e is FileLoadException)
{
retCode = System.Net.HttpStatusCode.Gone;
}
else if (e is FileNotFoundException || e is ArgumentException)
{
retCode = System.Net.HttpStatusCode.NotFound;
}
else if (e is ConstraintException)
{
retCode = (HttpStatusCode)422;
}
else
{
retCode = System.Net.HttpStatusCode.InternalServerError;
}
WebOperationContext.Current.OutgoingResponse.StatusCode = retCode;
WebOperationContext.Current.OutgoingResponse.Format = WebMessageFormat.Xml;
if (returnBundle)
{
throw new WebFaultException <Bundle>(MessageUtil.CreateBundle(result), retCode);
}
else
{
WebOperationContext.Current.OutgoingResponse.Headers.Add("Content-Disposition", "filename=\"error.xml\"");
throw e;
}
//return MessageUtil.CreateOutcomeResource(result);
}
/// <summary>
/// Parameters
/// </summary>
public override Bundle Query(NameValueCollection parameters)
{
if (parameters == null)
{
this.m_tracer.TraceError(nameof(parameters));
throw new ArgumentNullException(nameof(parameters), this.m_localizationService.GetString("error.type.ArgumentNullException"));
}
Core.Model.Query.NameValueCollection hdsiQuery = null;
var query = QueryRewriter.RewriteFhirQuery(typeof(Observation), typeof(Core.Model.Acts.Observation), parameters, out hdsiQuery);
// Do the query
var totalResults = 0;
IEnumerable <Core.Model.Acts.Observation> hdsiResults = null;
if (parameters["value-concept"] != null)
{
var predicate = QueryExpressionParser.BuildLinqExpression <CodedObservation>(hdsiQuery);
hdsiResults = this.QueryEx(predicate, query.QueryId, query.Start, query.Quantity, out totalResults).OfType <Core.Model.Acts.Observation>();
}
else if (parameters["value-quantity"] != null)
{
var predicate = QueryExpressionParser.BuildLinqExpression <QuantityObservation>(hdsiQuery);
hdsiResults = this.QueryEx(predicate, query.QueryId, query.Start, query.Quantity, out totalResults).OfType <Core.Model.Acts.Observation>();
}
else
{
var predicate = QueryExpressionParser.BuildLinqExpression <Core.Model.Acts.Observation>(hdsiQuery);
hdsiResults = this.Query(predicate, query.QueryId, query.Start, query.Quantity, out totalResults);
}
// Return FHIR query result
var retVal = new FhirQueryResult("Observation")
{
Results = hdsiResults.Select(this.MapToFhir).Select(o => new Bundle.EntryComponent
{
Resource = o,
Search = new Bundle.SearchComponent
{
Mode = Bundle.SearchEntryMode.Match
}
}).ToList(),
Query = query,
TotalResults = totalResults
};
base.ProcessIncludes(hdsiResults, parameters, retVal);
return(ExtensionUtil.ExecuteBeforeSendResponseBehavior(TypeRestfulInteraction.SearchType, this.ResourceType, MessageUtil.CreateBundle(retVal, Bundle.BundleType.Searchset)) as Bundle);
}
