Upgrading to SolrJ 10

[Christopher Schultz]

All,

I'm looking at migrating from Solr 8 -> Solr 10 and I'm starting with 
the changes to my application necessary from a Java API standpoint. I'm 
moving from 8.11.4 to 10.0.0. I'm also running Solr server in 
"standalone" mode if that changes anything.

Previously, I was using HttpSolrClient which no longer exists. It looks 
like I need to move to HttpJdkSolrClient or perhaps HttpJettySolrClient.

I started with HttpJdkSolrClient and it looks like I have far fewer 
options than I did before for customizing TLS options. For example, I 
need to provide a custom key store and trust store (okay, key managers 
and trust managers -- both of which appear to be doable via a custom 
SSLContext) and also custom TLS protocols and cipher suites. Neither of 
these last two seem to be an option through the current HttpJdkSolrClient.

Is this still possible? I'm finding that with more recent JREs I have 
less and less of a reason to customize the TLS protocols and cipher 
suites, but I would still like the option if necessary.

Related... will I be able to use the Solr 10 client to connect to my 
Solr 8 server? My plan is to run connected to both servers for a 
migration from one to the other.

-chris