protected static async Task <TResource> CreateResourceByIdentityAsync <TResource>(IFhirClient client, Model.Identifier identifier, Action <TResource, Model.Identifier> propertySetter)
where TResource : Model.Resource, new()
{
EnsureArg.IsNotNull(client, nameof(client));
EnsureArg.IsNotNull(identifier, nameof(identifier));
var resource = new TResource();
propertySetter?.Invoke(resource, identifier);
return(await client.CreateAsync <TResource>(resource).ConfigureAwait(false));
}
public virtual async Task <string> SaveObservationAsync(ILookupTemplate <IFhirTemplate> config, IObservationGroup observationGroup, IDictionary <ResourceType, string> ids)
{
var identifier = GenerateObservationIdentifier(observationGroup, ids);
var cacheKey = $"{identifier.System}|{identifier.Value}";
if (!_observationCache.TryGetValue(cacheKey, out Model.Observation existingObservation))
{
existingObservation = await GetObservationFromServerAsync(identifier).ConfigureAwait(false);
}
Model.Observation result;
if (existingObservation == null)
{
var newObservation = GenerateObservation(config, observationGroup, identifier, ids);
result = await _client.CreateAsync <Model.Observation>(newObservation).ConfigureAwait(false);
}
else
{
var policyResult = await Policy <Model.Observation>
.Handle <FhirOperationException>(ex => ex.Status == System.Net.HttpStatusCode.Conflict || ex.Status == System.Net.HttpStatusCode.PreconditionFailed)
.RetryAsync(2, async(polyRes, attempt) =>
{
existingObservation = await GetObservationFromServerAsync(identifier).ConfigureAwait(false);
})
.ExecuteAndCaptureAsync(async() =>
{
var mergedObservation = MergeObservation(config, existingObservation, observationGroup);
return(await _client.UpdateAsync(mergedObservation, versionAware: true).ConfigureAwait(false));
}).ConfigureAwait(false);
var exception = policyResult.FinalException;
if (exception != null)
{
throw exception;
}
result = policyResult.Result;
}
_observationCache.CreateEntry(cacheKey)
.SetAbsoluteExpiration(DateTimeOffset.UtcNow.AddHours(1))
.SetSize(1)
.SetValue(result)
.Dispose();
return(result.Id);
}