Add support for websocket subscriptions

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

@@ -0,0 +1,26 @@
+package ca.uhn.fhir.jpa.starter;
+
+import ca.uhn.fhir.context.FhirVersionEnum;
+import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
+
+public class ApplicationContext extends AnnotationConfigWebApplicationContext {
+
+    public ApplicationContext() {
+        FhirVersionEnum fhirVersion = HapiProperties.getFhirVersion();
+        if (fhirVersion == FhirVersionEnum.DSTU2) {
+            register(FhirServerConfigDstu2.class, FhirServerConfigCommon.class);
+        } else if (fhirVersion == FhirVersionEnum.DSTU3) {
+            register(FhirServerConfigDstu3.class, FhirServerConfigCommon.class);
+        } else if (fhirVersion == FhirVersionEnum.R4) {
+            register(FhirServerConfigR4.class, FhirServerConfigCommon.class);
+        } else {
+            throw new IllegalStateException();
+        }
+
+        if (HapiProperties.getSubscriptionWebsocketEnabled()) {
+            register(ca.uhn.fhir.jpa.config.WebsocketDispatcherConfig.class);
+        }
+
+    }
+
+}