How to use

incomingRequestPreHandled

method

in

ca.uhn.fhir.rest.server.interceptor.IServerInterceptor

/**
 * This method may be invoked by user code to notify interceptors that a nested
 * operation is being invoked which is denoted by this request details.
 */
public void notifyIncomingRequestPreHandled(RestOperationTypeEnum theOperationType) {
  RequestDetails requestDetails = getRequestDetails();
  if (requestDetails == null) {
    return;
  }
  IRestfulServerDefaults server = requestDetails.getServer();
  if (server == null) {
    return;
  }
  List<IServerInterceptor> interceptors = server.getInterceptors();
  for (IServerInterceptor next : interceptors) {
    next.incomingRequestPreHandled(theOperationType, this);
  }
}

protected final Object invokeServerMethod(IRestfulServer<?> theServer, RequestDetails theRequest, Object[] theMethodParams) {
  // Handle server action interceptors
  RestOperationTypeEnum operationType = getRestOperationType(theRequest);
  if (operationType != null) {
    for (IServerInterceptor next : theServer.getInterceptors()) {
      ActionRequestDetails details = new ActionRequestDetails(theRequest);
      populateActionRequestDetailsForInterceptor(theRequest, details, theMethodParams);
      next.incomingRequestPreHandled(operationType, details);
    }
  }
  // Actually invoke the method
  try {
    Method method = getMethod();
    return method.invoke(getProvider(), theMethodParams);
  } catch (InvocationTargetException e) {
    if (e.getCause() instanceof BaseServerResponseException) {
      throw (BaseServerResponseException) e.getCause();
    }
    throw new InternalErrorException("Failed to call access method: " + e.getCause(), e);
  } catch (Exception e) {
    throw new InternalErrorException("Failed to call access method: " + e.getCause(), e);
  }
}

public void notifyInterceptors(RestOperationTypeEnum theOperationType, ActionRequestDetails theRequestDetails) {
  if (theRequestDetails.getId() != null && theRequestDetails.getId().hasResourceType() && isNotBlank(theRequestDetails.getResourceType())) {
    if (theRequestDetails.getId().getResourceType().equals(theRequestDetails.getResourceType()) == false) {
      throw new InternalErrorException(
        "Inconsistent server state - Resource types don't match: " + theRequestDetails.getId().getResourceType() + " / " + theRequestDetails.getResourceType());
    }
  }
  if (theRequestDetails.getUserData().get(PROCESSING_SUB_REQUEST) == Boolean.TRUE) {
    theRequestDetails.notifyIncomingRequestPreHandled(theOperationType);
  }
  List<IServerInterceptor> interceptors = getConfig().getInterceptors();
  for (IServerInterceptor next : interceptors) {
    next.incomingRequestPreHandled(theOperationType, theRequestDetails);
  }
}

/**
 * This method may be invoked by user code to notify interceptors that a nested
 * operation is being invoked which is denoted by this request details.
 */
public void notifyIncomingRequestPreHandled(RestOperationTypeEnum theOperationType) {
  RequestDetails requestDetails = getRequestDetails();
  if (requestDetails == null) {
    return;
  }
  IRestfulServerDefaults server = requestDetails.getServer();
  if (server == null) {
    return;
  }
  List<IServerInterceptor> interceptors = server.getInterceptors();
  for (IServerInterceptor next : interceptors) {
    next.incomingRequestPreHandled(theOperationType, this);
  }
}

protected final Object invokeServerMethod(IRestfulServer<?> theServer, RequestDetails theRequest, Object[] theMethodParams) {
  // Handle server action interceptors
  RestOperationTypeEnum operationType = getRestOperationType(theRequest);
  if (operationType != null) {
    for (IServerInterceptor next : theServer.getInterceptors()) {
      ActionRequestDetails details = new ActionRequestDetails(theRequest);
      populateActionRequestDetailsForInterceptor(theRequest, details, theMethodParams);
      next.incomingRequestPreHandled(operationType, details);
    }
  }
  // Actually invoke the method
  try {
    Method method = getMethod();
    return method.invoke(getProvider(), theMethodParams);
  } catch (InvocationTargetException e) {
    if (e.getCause() instanceof BaseServerResponseException) {
      throw (BaseServerResponseException) e.getCause();
    }
    throw new InternalErrorException("Failed to call access method: " + e.getCause(), e);
  } catch (Exception e) {
    throw new InternalErrorException("Failed to call access method: " + e.getCause(), e);
  }
}

public void notifyInterceptors(RestOperationTypeEnum theOperationType, ActionRequestDetails theRequestDetails) {
  if (theRequestDetails.getId() != null && theRequestDetails.getId().hasResourceType() && isNotBlank(theRequestDetails.getResourceType())) {
    if (theRequestDetails.getId().getResourceType().equals(theRequestDetails.getResourceType()) == false) {
      throw new InternalErrorException(
        "Inconsistent server state - Resource types don't match: " + theRequestDetails.getId().getResourceType() + " / " + theRequestDetails.getResourceType());
    }
  }
  if (theRequestDetails.getUserData().get(PROCESSING_SUB_REQUEST) == Boolean.TRUE) {
    theRequestDetails.notifyIncomingRequestPreHandled(theOperationType);
  }
  List<IServerInterceptor> interceptors = getConfig().getInterceptors();
  for (IServerInterceptor next : interceptors) {
    next.incomingRequestPreHandled(theOperationType, theRequestDetails);
  }
}