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titleMultiple Configuration FIles

As described in the ReloadableServices documentation, the configuration is actually loaded from a bean whose name is specified by the property idp.service.metadata.resources, with the default value shibboleth.MetadataResolverResources (in turn defined in conf/services.xml to be a list with one entry: the file metadata-providers.xml)

You can, if you choose, override this with additional or different files or more advanced sources. Each resource usually is expected to supply a "top level" <MetadataProvider> element with attributes and child elements as described above. Search order amongst multiple top level elements is arbitrated by the sortKey attribute, where lower values are processed before higher ones.

It is also now possible to declare "by reference" metadata filters that are attached by reference, so it is possible to supply a resource whose top-level element is such a <MetadataFilter> in such cases.

titleSearch Ordering

If a specific relying party (as identified by a specific entityID) is duplicated in the metadata sources provided, then which precise entry is chosen is governed by the following rules:

  • Metadata sources combined via a chain are searched in the order in which they occur in the chain, and the first entry matching the entityID is returned.

  • If multiple "top level" Metadata Providers are provided then they are searched in an order derived from the (numeric) value of the sortKey attribute (lowest key first). If no sortKey is specified, then the search order is undefined.

  • In whatever order of sources is in effect, the first entry matching the entityID is returned.

  • If a single metadata source contains multiple entries with the same entityID, then which entry is returned is undefined (exception: invalid entries would be ignored in favor of valid ones in most cases).