Achieving AutoComplete feature using Solrj client

Hi, I am trying to upgrade a system which had an older version of Lucene library. I want to implement AutoCompletion feature using solrj client. In the earlier version they have used IndexSearcher class of lucene to do that. Is there any similar way to achieve it using solrj? I basically want to

code v.s. schema for BEST_COMPRESSION mode

I want to reduce the size of indexed and stored documents in Solr. I found two way in the first solution http://https://lucene.apache.org/solr/guide/6_6/codec-factory.html#solr-schemacodecfactory it

Re: Remove schema.xml in favor of managed-schema

Currently, there are no restrictions on hand-editing config files, mutable or not. The rub is that any of the APIs that modify configs operate on their in-memory copy and write that out (both Cloud and stand-alone modes). So if I start Solr, the nodes have image of the configs at time T. Now I

Re: Remove schema.xml in favor of managed-schema

I'm not sure changing something from mutable -> unmutable means it suddenly becomes hand-editable. I don't know the details here, but I can imagine a case that unmutable implies some level of consistency, where the file is hashed, and later might be confirmed to still be the same 'unmutable'