We are using Solr for our searches, and sharding the data across several cores. We have one core per week of data, so we are dynamically creating and deleting cores each week.
How can I query a solr server for a list of all its cores? The JavaDoc says I can use coreAdminHandler.getCoreContainer().getCoreNames(), but I'm not sure how to build a coreAdminHandler object.
Using SolrJ as you asked, here is how I did:
// Solr server instance
CommonsHttpSolrServer solrServer = ...;
// Request core list
CoreAdminRequest request = new CoreAdminRequest();
request.setAction(CoreAdminAction.STATUS);
CoreAdminResponse cores = request.process(solrServer);
// List of the cores
List<String> coreList = new ArrayList<String>();
for (int i = 0; i < cores.getCoreStatus().size(); i++) {
coreList.add(cores.getCoreStatus().getName(i));
}