David Smiley created SOLR-17354:
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Summary: A RequestHandler should be able to customize the
ResponseWriter
Key: SOLR-17354
URL: https://issues.apache.org/jira/browse/SOLR-17354
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Reporter: David Smiley
The ResponseWriter is resolved in a generic way in
{{org.apache.solr.servlet.HttpSolrCall#getResponseWriter}} by looking up the
{{wt}} param in {{org.apache.solr.core.SolrCore#DEFAULT_RESPONSE_WRITERS}},
more or less. But we have one and soon two special response writers (e.g.
prometheus or the schema) that are specific to a handler. We shouldn't be
forced to register a weird response writer in that static map; we should allow
a handler to instantiate the ResponseWriter on its own.
I imagine SolrQueryResponse could hold the ResponseWriter, which HttpSolrCall
could fetch. The default logic could be there, ignoring the detail about the
SolrCore instance. It's weird (to me) to see response writers registered on
the core; it seems much more like a node level concept. That's for another
issue to improve.
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