Github user nickwallen commented on the issue:
https://github.com/apache/metron/pull/740
> Can't we turn everything passed in into json and use the json patch stuff
to "build out' the configuration? Why not have the globals as a
map<string,object> all the time?
It still is always a map<string, object>, that has not changed. When I said
"How about we just restrict %define to strings only for now.", that just means
that a `%define` drops into the map<string, object>, values of strings without
trying to interpret the value and create a complex type.
The main itch that I'm trying to scratch here (which is maybe the 80%
case?) is to just set a simple property value.
```
%define bootstrap.servers=node1:6667
KAFKA_GET("indexing", 10)
```
If we treat `%define` arguments as JSON (so it behaves just like the `-z`)
then it would have to look something like this, which is way more quotes and
parens than I'd like to deal with.
```
%define { "bootstrap.servers" : "node1:6667" }
KAFKA_GET("indexing", 10)
```
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