Regarding the InterceptorService in the RestfulServer

[fight-nn]

Description

The root cause of the issue was that I wanted to intercept the /$mdm-merge-golden-resources operation and perform some custom operations after that. Therefore, I implemented an interceptor in the hapi-fhir-jpa-server. However, I found that the interceptor was not actually invoked. After in-depth debugging, I discovered that the RestfulServer was constructed in the StarterJpaConfig, and the specific code is as follows:

hapi-fhir-jpaserver-starter/src/main/java/ca/uhn/fhir/jpa/starter/common/StarterJpaConfig.java

Line 338 in cf00333

RestfulServer fhirServer = new RestfulServer(fhirSystemDao.getContext());

The code inside the constructor of this RestfulServer is as follows:
the hapi-fhir link is：
https://github.com/hapifhir/hapi-fhir/blob/76163efbb8dee90a37d945c44b94e74fa12a775d/hapi-fhir-server/src/main/java/ca/uhn/fhir/rest/server/RestfulServer.java#L191-L198
the hapi-fhir code is:

	public RestfulServer(FhirContext theCtx) {
		this(theCtx, new InterceptorService());
	}

You will find that the constructor creates a new InterceptorService. In fact, this class has already been instantiated in Spring. Please refer to the specific code for details:

the hapi-fhir link is：
https://github.com/hapifhir/hapi-fhir/blob/76163efbb8dee90a37d945c44b94e74fa12a775d/hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/config/JpaConfig.java#L518-L521

the hapi-fhir code is：

	@Bean
	public IInterceptorService jpaInterceptorService() {
		return new InterceptorService();
	}

And in other places, this InterceptorService is injected as well.

Was there any consideration when constructing the RestfulServer without obtaining it from the Spring Beans?

[XcrigX]

@fight-nn - I haven't looked at this closely, but remembered a similar issue raised previously. Please review this to see if it sheds any new light: #665