[JIRA] (MDA-276) Unify SimplePipeline and CompositeStage

[Ian Young (Jira)]

Ian Young ( https://shibboleth.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3Ae127cb03-43ed-473d-b6ba-592949cb4be8 ) *created* an issue

Metadata Aggregator ( https://shibboleth.atlassian.net/browse/MDA?atlOrigin=eyJpIjoiMjVkYWRhNmNhYzEwNDU0NmEyNjA3M2FhZmViZWQxYjgiLCJwIjoiaiJ9 ) / Improvement ( https://shibboleth.atlassian.net/browse/MDA-276?atlOrigin=eyJpIjoiMjVkYWRhNmNhYzEwNDU0NmEyNjA3M2FhZmViZWQxYjgiLCJwIjoiaiJ9 ) MDA-276 ( https://shibboleth.atlassian.net/browse/MDA-276?atlOrigin=eyJpIjoiMjVkYWRhNmNhYzEwNDU0NmEyNjA3M2FhZmViZWQxYjgiLCJwIjoiaiJ9 ) Unify SimplePipeline and CompositeStage ( https://shibboleth.atlassian.net/browse/MDA-276?atlOrigin=eyJpIjoiMjVkYWRhNmNhYzEwNDU0NmEyNjA3M2FhZmViZWQxYjgiLCJwIjoiaiJ9 )

Issue Type: Improvement Affects Versions: 0.9.2 Assignee: Ian Young ( https://shibboleth.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3Ae127cb03-43ed-473d-b6ba-592949cb4be8 ) Components: Pipeline Created: 01/Feb/23 5:41 PM Fix Versions: 0.10.0 Priority: Trivial Reporter: Ian Young ( https://shibboleth.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3Ae127cb03-43ed-473d-b6ba-592949cb4be8 )

It’s quite striking looking at large configurations that there are essentially two constructs with the same purpose of aggregating multiple stages and allowing them to be executed in sequence: the Pipeline interface as implemented by SimplePipeline and the specific CompositeStage implementation of Stage.

Each of these is usable in different places: CompositeStage is what you’d put in a Pipeline , or into another CompositeStage , but if you want to move the same group of stages into something like SplitMergeStage then you need to pick the other class.

My intuition is that it should be possible to make these interchangeable (thus eliminating one of them) or very nearly so. We should certainly try to eliminate needless differences (e.g., Pipeline has a stages property, while CompositeStage has composedStages ).

( https://shibboleth.atlassian.net/browse/MDA-276#add-comment?atlOrigin=eyJpIjoiMjVkYWRhNmNhYzEwNDU0NmEyNjA3M2FhZmViZWQxYjgiLCJwIjoiaiJ9 ) Add Comment ( https://shibboleth.atlassian.net/browse/MDA-276#add-comment?atlOrigin=eyJpIjoiMjVkYWRhNmNhYzEwNDU0NmEyNjA3M2FhZmViZWQxYjgiLCJwIjoiaiJ9 )

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