Add interceptor example

examples/pom.xml

@@ -92,6 +92,11 @@
 			<groupId>org.springframework</groupId>
 			<artifactId>spring-web</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>ca.uhn.hapi.fhir</groupId>
+			<artifactId>hapi-fhir-jpaserver-base</artifactId>
+			<version>${project.version}</version>
+		</dependency>
 
 		<dependency>
 			<groupId>org.slf4j</groupId>

examples/src/main/java/example/interceptor/MyTestInterceptor.java

@@ -0,0 +1,25 @@
+package example.interceptor;
+
+import ca.uhn.fhir.jpa.model.interceptor.api.Hook;
+import ca.uhn.fhir.jpa.model.interceptor.api.Interceptor;
+import ca.uhn.fhir.jpa.model.interceptor.api.Pointcut;
+import ca.uhn.fhir.jpa.subscription.module.CanonicalSubscription;
+import ca.uhn.fhir.jpa.subscription.module.subscriber.ResourceDeliveryMessage;
+
+/**
+ * Interceptor class
+ */
+@Interceptor
+public class MyTestInterceptor {
+
+	@Hook(Pointcut.SUBSCRIPTION_BEFORE_REST_HOOK_DELIVERY)
+	public boolean beforeRestHookDelivery(ResourceDeliveryMessage theDeliveryMessage, CanonicalSubscription theSubscription) {
+
+		String header = "Authorization: Bearer 1234567";
+
+		theSubscription.addHeader(header);
+
+		return true;
+	}
+
+}