[JIRA] (IDP-1870) Detect duplicate entityIDs when ingesting metadata

[Brent Putman (Jira)]

Brent Putman ( https://shibboleth.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3A97de0981-adc3-4044-95ed-131622fad81e ) *commented* on IDP-1870 ( https://shibboleth.atlassian.net/browse/IDP-1870?atlOrigin=eyJpIjoiNTcyOTMxMjBjZTY0NGE2NTk1MTllYzNjYjE3NGU2ZDMiLCJwIjoiaiJ9 )

Re: Detect duplicate entityIDs when ingesting metadata ( https://shibboleth.atlassian.net/browse/IDP-1870?atlOrigin=eyJpIjoiNTcyOTMxMjBjZTY0NGE2NTk1MTllYzNjYjE3NGU2ZDMiLCJwIjoiaiJ9 )

Added some draft support java-opensaml for this in 4f8b4c77b747cb5c70eb904d0a9bcb6b2b3082f0.

The approach is detection on resolution within the ChainingMetadataResolver. A strategy enum can be supplied either via static config on the resolver, or dynamically in the criteria. The dynamic value from criteria overrides the static property. Strategy can be Off, Batch, Dynamic, All. (The Dynamic is probably not useful in reality, but for symmetry seemed appropriate to support).

If this approach works out, then still need:

* Spring parser support in the IdP for the static config property.
* Support in the admin flow of the IdP for dynamically adding the strategy to the criteria if specified via query param, etc.

( https://shibboleth.atlassian.net/browse/IDP-1870#add-comment?atlOrigin=eyJpIjoiNTcyOTMxMjBjZTY0NGE2NTk1MTllYzNjYjE3NGU2ZDMiLCJwIjoiaiJ9 ) Add Comment ( https://shibboleth.atlassian.net/browse/IDP-1870#add-comment?atlOrigin=eyJpIjoiNTcyOTMxMjBjZTY0NGE2NTk1MTllYzNjYjE3NGU2ZDMiLCJwIjoiaiJ9 )

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