public void TestSourceCaching()
{
var src = new CachedResolver(new MultiResolver(ZipSource.CreateValidationSource(), new WebResolver()));
Stopwatch sw1 = new Stopwatch();
// Ensure looking up a failed endpoint repeatedly does not cost much time
sw1.Start();
src.ResolveByUri("http://some.none.existant.address.nl/fhir/StructureDefinition/bla");
sw1.Stop();
var sw2 = new Stopwatch();
sw2.Start();
src.ResolveByUri("http://some.none.existant.address.nl/fhir/StructureDefinition/bla");
sw2.Stop();
Debug.WriteLine("sw2 {0}, sw1 {1}", sw2.ElapsedMilliseconds, sw1.ElapsedMilliseconds);
Assert.IsTrue(sw2.ElapsedMilliseconds <= sw1.ElapsedMilliseconds && sw2.ElapsedMilliseconds < 100);
// Now try an existing artifact
sw1.Restart();
src.ResolveByUri("http://hl7.org/fhir/ValueSet/v2-0292");
sw1.Stop();
sw2.Restart();
src.ResolveByUri("http://hl7.org/fhir/ValueSet/v2-0292");
sw2.Stop();
Assert.IsTrue(sw2.ElapsedMilliseconds < sw1.ElapsedMilliseconds && sw2.ElapsedMilliseconds < 100);
}
public void SaveStructureDefinition(StructureDefinition sd)
{
// Ensure the folder exists
Uri t = new Uri(sd.Url);
string profileOutputDirectory = Path.Combine(_outputProfilePath, t.Host);
if (!Directory.Exists(profileOutputDirectory))
{
Directory.CreateDirectory(profileOutputDirectory);
}
// Non extensions will just go in the root of the output
if (sd.BaseDefinition != "http://hl7.org/fhir/StructureDefinition/Extension")
{
profileOutputDirectory = _outputProfilePath;
}
// Now output the file
System.IO.File.WriteAllText($"{profileOutputDirectory}/StructureDefinition-{sd.Id}.xml", new FhirXmlSerializer(new SerializerSettings()
{
AppendNewLine = true, Pretty = true
}).SerializeToString(sd));
// And add it to our resolver
sourceSD.InvalidateByCanonicalUri(sd.Url);
ds.Refresh();
// And check that it comes back...
var instSD = sourceSD.ResolveByUri(sd.Url) as StructureDefinition;
if (instSD == null)
{
Console.WriteLine($"Was not able to resolve the newly created extension");
}
}
public void TestCacheInvalidation()
{
var src = new CachedResolver(new MultiResolver(ZipSource.CreateValidationSource()));
CachedResolver.LoadResourceEventArgs eventArgs = null;
CachedResolver.LoadResourceEventHandler handler = (sender, args) => { eventArgs = args; };
src.Load += handler;
// Verify that the Load event is fired on the initial load
const string resourceUri = "http://hl7.org/fhir/ValueSet/v2-0292";
var resource = src.ResolveByUri(resourceUri);
Assert.IsNotNull(eventArgs);
Assert.AreEqual(resourceUri, eventArgs.Url);
Assert.AreEqual(resource, eventArgs.Resource);
// Verify that the Load event is not fired on subsequent load
eventArgs = null;
resource = src.ResolveByUri(resourceUri);
Assert.IsNull(eventArgs);
// Verify that we can remove the cache entry
var result = src.InvalidateByUri(resourceUri);
Assert.IsTrue(result);
// Verify that the cache entry has been removed
result = src.InvalidateByUri(resourceUri);
Assert.IsFalse(result);
// Verify that the Load event is fired again on the next load
var resource2 = src.ResolveByUri(resourceUri);
Assert.IsNotNull(eventArgs);
Assert.AreEqual(resourceUri, eventArgs.Url);
Assert.AreEqual(resource2, eventArgs.Resource);
// Verify that the cache returned a new instance with exact same value
Assert.AreNotEqual(resource2.GetHashCode(), resource.GetHashCode());
Assert.IsTrue(resource.IsExactly(resource2));
}