From my experience this is still limited and lot of things are broken if you
still want to do it in a strongly typed manner.
The only reliable way is to go right now is via a string-expression building
route for the streaming expression.
That being said, if your expressions are simple enough you could build it in a
strongly typed manner.
@Joel may be able to advise here.
> On Jun 27, 2018, at 9:41 AM, Pratik Patel <pra...@semandex.net> wrote:
>
> Hello Everyone,
>
> Is there any java library for building Streaming Expressions? Currently, I
> am using solr's java client and building Streaming Expressions as follows.
>
> StreamFactory factory = new StreamFactory().withCollectionZkHost( collName,
> zkHost )
> .withFunctionName("gatherNodes",
> GatherNodesStream.class)
> .withFunctionName("search", CloudSolrStream.class)
> .withFunctionName("count", CountMetric.class)
> .withFunctionName("having", HavingStream.class)
> .withFunctionName("gt", GreaterThanOperation.class)
> .withFunctionName("eq", EqualsOperation.class);
> HavingStream cs = (HavingStream) factory.constructStream(
> <streaming_expression_str> );
>
> In this approach, I still have to build streaming_expression_str in code.
> Is there any better approach for this or is there any java library to do
> this? My search for it didn't yield anything so I was wondering if anyone
> here has an idea.
>
> Thanks,
> Pratik
