Adding support for '*' cornercase

src/main/java/ca/uhn/fhir/jpa/starter/AppProperties.java

@@ -928,6 +928,7 @@ public class AppProperties {
 			request_tenant_partitioning_mode = theRequest_tenant_partitioning_mode;
 		}
 	}
+
 	public static class RemoteSystem {
 		private String system;
 		private String url;

src/main/java/ca/uhn/fhir/jpa/starter/common/FhirServerConfigR4.java

@@ -30,20 +30,60 @@ public class FhirServerConfigR4 {
 
 	@Bean(name = "myHybridRemoteValidationSupportChain")
 	@Conditional({OnR4Condition.class, OnRemoteTerminologyPresent.class})
-	public IValidationSupport addRemoteValidation(ValidationSupportChain theValidationSupport, FhirContext theFhirContext, AppProperties theAppProperties)
+	public IValidationSupport addRemoteValidation(
-	{
+			ValidationSupportChain theValidationSupport, FhirContext theFhirContext, AppProperties theAppProperties) {
-		theAppProperties.getRemoteTerminologyServicesMap().forEach((key, remoteSystem) -> {
+		var values = theAppProperties.getRemoteTerminologyServicesMap().values();
-			theValidationSupport.addValidationSupport(0 , new RemoteTerminologyServiceValidationSupport(theFhirContext, remoteSystem.getUrl()){
+
+		// If the remote terminology service is "*" and is the only one then forward all requests to the remote
+		// terminology service
+		if (values.size() == 1 && "*".equalsIgnoreCase(values.iterator().next().getSystem())) {
+			var remoteSystem = values.iterator().next();
+			theValidationSupport.addValidationSupport(
+					0, new RemoteTerminologyServiceValidationSupport(theFhirContext, remoteSystem.getUrl()) {
 						@Override
-				public CodeValidationResult validateCode(ValidationSupportContext theValidationSupportContext, ConceptValidationOptions theOptions, String theCodeSystem, String theCode, String theDisplay, String theValueSetUrl) {
+						public CodeValidationResult validateCode(
+								ValidationSupportContext theValidationSupportContext,
+								ConceptValidationOptions theOptions,
+								String theCodeSystem,
+								String theCode,
+								String theDisplay,
+								String theValueSetUrl) {
+							return super.validateCode(
+									theValidationSupportContext,
+									theOptions,
+									theCodeSystem,
+									theCode,
+									theDisplay,
+									theValueSetUrl);
+						}
+					});
+			return theValidationSupport;
+
+			// If there are multiple remote terminology services, then add each one to the validation chain
+		} else {
+			values.forEach((remoteSystem) -> theValidationSupport.addValidationSupport(
+					0, new RemoteTerminologyServiceValidationSupport(theFhirContext, remoteSystem.getUrl()) {
+						@Override
+						public CodeValidationResult validateCode(
+								ValidationSupportContext theValidationSupportContext,
+								ConceptValidationOptions theOptions,
+								String theCodeSystem,
+								String theCode,
+								String theDisplay,
+								String theValueSetUrl) {
 							if (remoteSystem.getSystem().equalsIgnoreCase(theCodeSystem)) {
-						return super.validateCode(theValidationSupportContext, theOptions, theCodeSystem, theCode, theDisplay, theValueSetUrl);
+								return super.validateCode(
+										theValidationSupportContext,
+										theOptions,
+										theCodeSystem,
+										theCode,
+										theDisplay,
+										theValueSetUrl);
 							}
 							return null;
 						}
-			});
+					}));
-		});
+		}
-
 		return theValidationSupport;
 	}
 }

src/main/resources/application.yaml

@@ -290,12 +290,15 @@ hapi:
     #    retain_cached_searches_mins: 60
     #    reuse_cached_search_results_millis: 60000
     remote_terminology_service:
+    #  all:
+    #    system: '*'
+    #    url: 'https://tx.fhir.org/r4/'
       snomed:
         system: 'http://snomed.info/sct'
         url: 'https://tx.fhir.org/r4/'
       loinc:
         system: 'http://loinc.org'
-        url: 'https://fhir.loinc.org/'
+        url: 'https://hapi.fhir.org/baseR4/'
     tester:
       home:
         name: Local Tester