Chapter 4

1. The wire format is not usable in environments that only look at the HTTP status code to determine the HC status.
2. An MP-HC response can include arbitrary properties using the HealthCheckResponse#withData() methods.
3. You can create a HealthCheck implementation for each service, and the MP-HC feature will logically combine them to produce an overall status response.
4. A JWT is a JSON Web Token, a JSON-formatted object that has a header, payload, and signature component.
5. A claim is a single named value from the JWT payload.
6. Anything that can be represented in JSON can be used in a JWT.
7. The single main step in authenticating a JWT is validating that it is signed via the RS256 algorithm based on a configured public key.
8. One could look at claims other that the groups claim to make checks to add application specific authorization decisions.

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