[SOLR-8698] params.json should have a way to specify appends and invariants

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 6.0
• Assignee: Noble Paul
• Reporter: Noble Paul
• Created: 18/Feb/16 22:52
• Updated: 01/Mar/16 17:06
• Resolved: 23/Feb/16 12:11

Description

params.json only supports defaults today. It should be possible to add appends and invariants

for example

{
"params":{

"my_param_set" : {
"a":"A",
"b" :"B",
"_appends_" : {
"c": "C"
},
"_invariants_":{
"d" : "D"
}}
}

In this case variables a and b are defaults, c is appends and d is invariants

The fact that we can have invariants and appends means that if a useParam is specified with the component, it should not be overridable from the request

So, this introduces a back incompat change