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Example 1: A traditional configuration using FilesystemMetadataProvider for local metadata and FileBackedHTTPMetadataProvider for federation metadata
Example 2: A "no touch" configuration using LocalDynamicMetadataProvider for local metadata and FileBackedHTTPMetadataProvider for federation metadata
Example 3: A completely dynamic configuration using LocalDynamicMetadataProvider for local metadata and DynamicHTTPMetadataProvider for federation metadata
Example 4: A variation on the previous example that pre-fetches metadata for one or more high-value SPs

The following example illustrates one or more providers of type FilesystemMetadataProvider followed by a single FileBackedHTTPMetadataProvider:

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Tip

title	Avoid redundant providers in the chain

Resolve federation metadata with either a FileBackedHTTPMetadataProvider (Example #2) or a DynamicHTTPMetadataProvider (Example #3) but not both. Assuming the same set of entities are represented in each case, the two approaches are mutually exclusive.

The following example expands on the previous example by adding one or more providers of type FileBackedHTTPMetadataProvider:

Code Block

language	xml
title	Example 4: A dynamic configuration with pre-fetch
collapse	true

<MetadataProvider id="chain" xsi:type="ChainingMetadataProvider">
	<!-- 
		Exactly one provider of type LocalDynamicMetadataProvider for local metadata.
		The metadata provider configures a source directory containing one or more
		static entity descriptors.
	-->
	<MetadataProvider id="LocalMetadata" xsi:type="LocalDynamicMetadataProvider" ...>
      <!-- ... -->
	</MetadataProvider>
	
	<!-- 
		One or more providers of type FileBackedHTTPMetadataProvider for federation
		metadata. Each provider loads (and reloads) a single entity descriptor
		(which would otherwise expire).
	-->
	<MetadataProvider id="HighValueEntityMetadata" xsi:type="FileBackedHTTPMetadataProvider" ...>
      <!-- ... -->
	</MetadataProvider>

	<!-- 
		Exactly one provider of type DynamicHTTPMetadataProvider for federation metadata.
		Individual entity descriptors are fetched dynamically as needed from a metadata
		query server.
	-->
	<MetadataProvider id="FederationMetadata" xsi:type="DynamicHTTPMetadataProvider" ...>
      <!-- ... -->
	</MetadataProvider>
</MetadataProvider>

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