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201809 FHIR Subscriptions

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FHIR Subscriptions

Dedicated Zulip chat stream for this track.

Previous Subscriptions Connectathons

Submitting WG/Project/Implementer Group

FHIR-I

Justification

This track is an important step in advancing the maturity of the interactions and resources associated with FHIR Subscriptions.

The subscription pub/sub pattern enables FHIR clients to retrieve data from a server without performing a more expensive periodic polling queries.

Proposed Track Lead

See Connectathon_Track_Lead_Responsibilities

Jenni Syed

FHIR version

STU3

Expected participants

Cerner, <your name here!>

Roles

FHIR Server

The FHIR Server supports the Subscription resource and pushing relevant FHIR resources to client.

  • Must expose a Subscriptions resource supporting read, create and update.
  • Must also act as a FHIR client to send notifications.

Subscribing client

Subscribes to FHIR server and gets updates.

  • Must create a Subscriptions instance on external FHIR server.
  • Must expose an endpoint to accept notifications.

Scenarios

Create FHIR Subscription

Action: Subscribing client creates a Subscription instance on FHIR Server.
Precondition: n/a
Success Criteria: Subscribing client POSTs new subscription resource to FHIR server. FHIR Server persists active subscription resource. Subscribing client can read newly created Subscription.
Bonus point: Subscribing client updates Subscription instance's status element to _off_ once the subscription is no longer needed. FHIR server respects this setting.

REST Hook with payload of "payload": "application/fhir+json"

Action: FHIR Server notifies Subscribing client by pushing a FHIR resource to the endpoint identified in the subscription resource instance.
Precondition: Create FHIR Subscription scenario
Success Criteria: FHIR server pushes FHIR payload of relevant resource using REST Hook when the subscribed event occurs in the FHIR server..

Argonaut Patient Scheduling prefetch

Subscribe to Schedule using Argonaut extension

Action: Client subscribes to Schedule per Argonaut Patient Scheduling IG.
Precondition: n/a
Success Criteria: Subscribing client POSTs new subscription resource (including Schedule identifier in _\_criteria_) to FHIR server. FHIR Server persists active subscription resource. Subscribing client can read newly created Subscription.

Notify client of Slot change

Action: FHIR Server notifies subscribers by pushing a FHIR Schedule resource to the endpoint identified in the subscription, according to Argonaut Patient Scheduling.
Precondition: FHIR Subscription created
Success Criteria: FHIR server pushes FHIR payload of relevant resource using REST Hook when the subscribed event occurs in the FHIR server.
Bonus point: Subscriber subsequently fetches Slots associated with Schedule from notification.

Notes

Please discuss/explore this tracker issue: [1]